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Sample records for agulha cortante trucut

  1. Transjugular liver biopsy: histological diagnosis success comparing the trucut to the modified aspiration Ross needle Biopsia hepática transjugular: comparação do sucesso diagnóstico histológico entre as agulhas trucut e a aspirativa modificada de Ross

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    Antonio Carlos Maciel

    2003-06-01

    Full Text Available BACKGROUND: Transjugular liver biopsy is an alternative procedure for patients who present contraindications to standard percutaneous procedure. AIM: To compare the rate of histological diagnosis obtained on transjugular liver biopsy with an automated trucut needle and with a modified Ross needle. PATIENTS / METHOD: Eighty-five patients with suspicion of chronic liver diseases and presenting contraindications for percutaneous liver biopsy (coagulopathy, massive ascites, morbid obesity, or chronic renal problems were submitted to 89 transjugular liver biopsies between March 1994 and April 2001 at ''Hospital São José, Irmandade da Santa Casa de Misercórdia'', Porto Alegre, RS, Brazil. Thirty-five patients underwent 36 biopsies with an automated trucut needle, and 50 patients underwent 53 biopsies with a modified Ross needle. RESULTS: Histological diagnosis was reached in 32/35 subjects submitted to transjugular liver biopsy with the trucut needle (91% and in 35/50 (70% submitted to biopsy with the modified Ross needle. Specimens obtained with the trucut needle were significantly larger and less fragmented than those obtained with the Ross needle. CONCLUSION: Transjugular liver biopsy with the automated trucut needle allowed a higher rate of histological diagnosis when compared to the modified Ross needle in patients with suspicion of chronic liver diseases.RACIONAL: A biopsia hepática transjugular é um procedimento alternativo para pacientes que apresentam contra-indicações ao procedimento padrão (percutâneo. OBJETIVO: Comparar o índice de diagnóstico obtido por meio da biopsia hepática transjugular utilizando uma agulha automatizada trucut e uma agulha Ross modificada. MÉTODOS: Oitenta e cinco pacientes com suspeita de doenças hepáticas crônicas e apresentando contra-indicações para biopsia hepática percutânea (coagulopatia, ascite maciça, obesidade mórbida ou problemas renais crônicos foram submetidos a 89 biopsias hep

  2. Geodesic detection of Agulhas rings

    Science.gov (United States)

    Beron-Vera, F. J.; Wang, Y.; Olascoaga, M. J.; Goni, G. J.; Haller, G.

    2012-12-01

    Mesoscale oceanic eddies are routinely detected from instantaneous velocities. While simple to implement, this Eulerian approach gives frame-dependent results and often hides true material transport by eddies. Building on the recent geodesic theory of transport barriers, we develop an objective (i.e., frame-independent) method for accurately locating coherent Lagrangian eddies. These eddies act as compact water bodies, with boundaries showing no leakage or filamentation over long periods of time. Applying the algorithm to altimetry-derived velocities in the South Atlantic, we detect, for the first time, Agulhas rings that preserve their material coherence for several months, while eddy candidates yielded by other approaches tend to disperse or leak within weeks. These findings suggest that current Eulerian estimates of the Agulhas leakage need significant revision.Temporal evolution of fluid patches identified as eddies by different methods. First column: eddies extracted using geodesic eddy identification [1,2]. Second column: eddies identified from sea surface height (SSH) using the methodology of Chelton et al. [2] with U/c > 1. Third column: eddies identified as elliptic regions by the Okubo-Weiss (OW) criterion [e.g., 3]. Fourth column: eddies identified as mesoelliptic (ME) regions by Mezic et al.'s [4] criterion. References: [1] Beron-Vera et al. (2012). Geodesic eddy detection suggests reassessment of Agulhas leakage. Proc. Nat. Acad. Sci. USA, submitted. [2] Haller & Beron-Vera (2012). Geodesic theory of transport barriers in two-dimensional flows. Physica D, in press. [2] Chelton et al. (2011). Prog. Oceanog. 91, 167. [3] Chelton et al. (2007). Geophys. Res. Lett. 34, L5606. [4] Mezic et al. (2010). Science 330, 486.

  3. Clinical significance of transurethral tru-cut biopsy in confirmation of bladder tumor invasive character

    International Nuclear Information System (INIS)

    The objective of this study was to evaluate the feasibility of resection (TURBT) replacement in patients with strong suspicion of invasive bladder tumor by transurethral tru-cut biopsy carried out during cystoscopy. Fifty-eight patients (52 men and six women; mean age 65 years, range 43-79) presenting with extensive bladder tumor suggested by ultrasound and computed tomography were included in the study. Each patient was submitted to transurethral, cystoscopically-guided tru-cut biopsy of bladder tumor before the planned TURBT. Comparison of histopathological assessment of tissue cores, resection and radical cystectomy specimens was carried out. Histopathological analysis of resection specimens and tissue cores were in complete accordance with previous tissue cores assessment in terms of type and grade of bladder cancer. Histological type of bladder tumor revealed by tru-cut biopsy and radical cystectomy was identical in 56 (96.6%) cases. Tumor grade was the same in biopsy cores and radical cystectomy specimens in 55 (95%) cases. Endoscopic tru-cut bladder tumor biopsy allows us to collect sufficient amounts of tissue material for histopathological confirmation of detrusor muscle infiltration in patients presenting with bladder tumors suspected to cause muscle invasiveness. The procedure is carried out under cystoscopic control and is fast, efficient, safe, easy to perform and less invasive than standard TURB in cases of an extensive bladder tumor. (author)

  4. An observed 20 yr time-series of Agulhas leakage

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    D. Le Bars

    2014-01-01

    Full Text Available We provide a time series of Agulhas leakage anomalies over the last twenty years from satellite altimetry. Until now, measuring the interannual variability of Indo-Atlantic exchange has been the major barrier in the investigation of the dynamics and large scale impact of Agulhas leakage. We compute the difference of transport between Agulhas Current and Agulhas Return Current which allows to deduce Agulhas leakage. The main difficulty is to separate the Agulhas Return Current from the southern limb of the subtropical "supergyre" south of Africa. For this purpose, an algorithm that uses absolute dynamic topography data is developed. The algorithm is applied to a state-of-the-art ocean model. The comparison with a Lagrangian method to measure the leakage allows to validate the new method. An important result is that it is possible to measure Agulhas leakage in this model using the velocity field along a section that crosses both the Agulhas Current and the Agulhas Return Current. In the model a good correlation is found between measuring leakage using the full depth velocities and using only the surface geostrophic velocities. This allows us to extend the method to along-track absolute dynamic topography from satellites. It is shown that the accuracy of the mean dynamic topography does not allow to determine the mean leakage but that leakage anomalies can be accurately computed.

  5. Impact of the Indonesian throughflow on Agulhas leakage

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    D. Le Bars

    2013-02-01

    Full Text Available Using ocean models of different complexity we show that opening the Indonesian Passage between the Pacific and the Indian Ocean increases the input of Indian Ocean water into the South Atlantic via the Agulhas leakage. In a strongly eddying global ocean model this response results from an increased Agulhas Current transport and a constant proportion of Agulhas retroflection south of Africa. The leakage increases through an increased frequency of ring shedding events. In an idealized two-layer and flat-bottom eddy resolving model, the proportion of the Agulhas Current transport that retroflects is (for a wide range of wind stress forcing not affected by an opening of the Indonesian Passage. A linear ocean model is not able to explain this behavior which reveals the importance of mixed barotropic/baroclinic instabilities in controlling the Agulhas leakage.

  6. On Madagascar, Mozambique and Agulhas eddies

    Science.gov (United States)

    Lacasce, J. H.; Isachsen, P. E.

    2006-12-01

    Agulhas, Madagascar and Mozambique eddies are vortices which form in the southwest Indian Ocean. All are in excess of 100 km in size, extend deep in the water column and drift westward from their respective formation sites. We suggest all three phenomena may originate from discontinuities in the wind-driven Sverdrup circulation. These discontinuities produce westward-flowing jets which are barotropically unstable, and thus generate vortices. We illustrate the idea using a linear analytical model and a nonlinear numerical model. The linear model produces westward jets off the northern and southern tips of Madagascar, and off the southern tip of South Africa. All these are unstable by the Rayleigh-Kuo criterion. Vortices of realistic size form in all three locations in the numerical model and subsequently drift westward, as observed. The primary shortcoming in the models is their failure to produce a strong retroflection of the Agulhas Current. Further model simulations suggest that both topography and stratification are required for this, consistent with previous numerical results.

  7. Resistencia a cortante de los forjados de vigueta pretensada y bovedilla

    OpenAIRE

    Ribas Gonzalez, Carlos R.

    2013-01-01

    A pesar de que los forjados de vigueta pretensada y bovedilla se han utilizado desde los años 40 en prácticamente todo el mundo, los modelos que actualmente se utilizan para su cálculo frente al Estado Límite Último de cortante adolecen de falta de base teórica e incluso experimental. El objetivo principal de esta tesis es contribuir al avance del conocimiento del comportamiento frente a la rotura de las vigas que componen los forjados de vigueta pretensada y bovedilla, fundamentalmente a ...

  8. Impact of the Indonesian Throughflow on Agulhas leakage

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    D. Le Bars

    2013-09-01

    Full Text Available Using ocean models of different complexity we show that opening the Indonesian Passage between the Pacific and the Indian oceans increases the input of Indian Ocean water into the South Atlantic via the Agulhas leakage. In a strongly eddying global ocean model this response results from an increased Agulhas Current transport and a constant proportion of Agulhas retroflection south of Africa. The leakage increases through an increased frequency of ring shedding events. In an idealized two-layer and flat-bottom eddy resolving model, the proportion of the Agulhas Current transport that retroflects is (for a wide range of wind stress forcing not affected by an opening of the Indonesian Passage. Using a comparison with a linear model and previous work on the retroflection problem, the result is explained as a balance between two mechanisms: decrease retroflection due to large-scale momentum balance and increase due to local barotropic/baroclinic instabilities.

  9. Acidentes com pérfuro-cortantes na equipe de enfermagem

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    Rafael da Silva Soares

    2012-03-01

    Full Text Available Normal 0 21 false false false MicrosoftInternetExplorer4 Objetivo: discutir a ocorrência de acidente de trabalho com material pérfuro-cortante entre a equipe de enfermagem. Método: a pesquisa é de natureza descritivo-exploratória, que se deu por meio de revisão bibliográfica. A seleção dos artigos, em ambiente virtual, se deu pelos descritores relacionados ao assunto e leitura interpretativa do material das publicações. Foram incluídos artigos, dissertações e livros referentes a temática. A coleta do material foi realizada no período de julho de 2007 a julho de 2008. Resultados e Conclusão: constatou-se que, a ocorrência de acidentes se dá principalmente a partir de condições de trabalho inadequadas, com a existência de fatores do tipo: desconhecimento dos profissionais, jornada de trabalho, divisão e acúmulo de tarefas insatisfatórias, dentre outras que predispõem os trabalhadores aos riscos de acidentes com materiais pérfuro-cortantes e exposição biológica.

  10. Coastal upwelling on the far eastern Agulhas Bank associated with large meanders in the Agulhas Current

    Science.gov (United States)

    Goschen, W. S.; Bornman, T. G.; Deyzel, S. H. P.; Schumann, E. H.

    2015-06-01

    Six large solitary meanders in the Agulhas Current, so-called Natal Pulses, propagated down the eastern coast of South Africa between 2009 and 2011. Their influence on the coastal waters between Port Alfred and Algoa Bay, on the far eastern Agulhas Bank, was measured by thermistor strings moored at 30-80 m bottom depths and two current metres (30 m bottom depth) located at both sides of Algoa Bay. During all events active upwelling lasting 1-3 weeks was observed over the inner shelf and in Algoa Bay. During upwelling the isotherms ascended at an average rate of 1.8 m day-1 as the cold bottom layer increased in thickness to 40-60 m, although upwelled water did not break the surface in all cases. Cold water remained in the area for a further 2-3 weeks. During three Natal Pulses the water temperatures at the outer moorings initially increased as the plume of the leading edge (crest) of the meander moved onshore. During one Natal Pulse upwelling was recorded before the warm water plume impacted the moorings. At the onset of upwelling currents switched to the southwest in the case of Bird Island and southward at the Cape Recife inner-bay site and reached a maximum speed of 80 cm s-1. During all Natal Pulses cold bottom water (10-12 °C) flooded over the 80 m bottom depth moorings as the crest of the meander moved onshore, but also around the same time the core of the Agulhas Current began to move offshore. In all cases upwelling was wide-spread.

  11. Spatio-temporal characteristics of the Agulhas Current retroflection

    OpenAIRE

    Dencausse, Guillaume; Arhan, Michel; Speich, Sabrina

    2010-01-01

    A 12 7-year series of weekly absolute sea surface height (SSH) data in the region south of Africa is used for a statistical characterization of the location of the Agulhas Current retroflection and its variations at periods up to 2 years The highest probability of presence of the retroflection point is at similar to 39 5 S/ 18-20 E The longitudinal probability density is negatively skewed A sharp eastward decrease at 22 E is related to detachments of the Agulhas Current from the continental s...

  12. US-guided transcutaneous tru-cut biopsy of laryngo-hypopharyngeal lesions

    Energy Technology Data Exchange (ETDEWEB)

    Preda, Lorenzo; De Fiori, Elvio; Rampinelli, Cristiano; Petralia, Giuseppe; Bonello, Luke [European Institute of Oncology, Department of Radiology, Milan (Italy); Ansarin, Mohssen; Chiesa, Fausto [European Institute of Oncology, Department of Head and Neck Surgery, Milan (Italy); Maffini, Fausto [European Institute of Oncology, Patology Division, Laboratory of Anatomy, Milan (Italy); Alterio, Daniela [European Institute of Oncology, Radiotherapy Division, Milan (Italy); Bellomi, Massimo [European Institute of Oncology, Department of Radiology, Milan (Italy); University of Milan, School of Medicine, Milan (Italy)

    2010-06-15

    To evaluate the feasibility and performance of ultrasound-guided transcutaneous tru-cut biopsy (USGTCB) in selected patients (with stenosis of airways or difficult intubation or contraindication to general anaesthesia) with untreated or previously treated suspicious laryngo-hypopharyngeal masses. Biopsies were performed with a free-hand technique by a single radiologist. Thirty-six USGTCBs were scheduled in 34 patients (24 males, 10 females; age range 47-95 years). Two USGTCBs were not performed, as lesions were not detectable: therefore, 16 USGTCBs were performed for an untreated mass suspicious for malignancy and 18 were performed for a mass suspicious for recurrence after radiotherapy alone, or associated with endoscopic laser surgery or chemotherapy. USGTCB diagnosed 25 squamous cell carcinomas (73.5%) and nine benign lesions (26.5%); no false positives and two false negatives were reported, both in patients previously treated with radiotherapy. The sensitivity, specificity, positive and negative predictive value of the technique was 92.5%, 100%, 100% and 77.7% respectively, with no major complications. Although biopsy under microlaryngoscopy remains the ''gold-standard'' technique, USGTCB is feasible, carries the advantages of avoiding general anaesthesia, is suitable for outpatients and is cost-effective. If applied to selected patients, it could be considered for the histological diagnosis of both primary and recurrent laryngo-hypopharyngeal masses. (orig.)

  13. EUS-Guided Fine Needle Aspiration with and without Trucut Biopsy of Pancreatic Masses

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    Syed Mubashir Shah

    2008-07-01

    Full Text Available Context Endoscopic ultrasound-guided trucut biopsy (EUS TCB has a lower yield than fine needle aspiration (FNA in pancreatic masses but the additional use of TCB to FNA may improve the diagnostic accuracy over FNA alone. Objective To compare the yield of EUS FNA alone or combined with EUS TCB for diagnosis of pancreatic masses. Design Single center retrospective case control study conducted at academic tertiary center. Study conducted between March 2004 and April 2007. Participants A total of 126 consecutive patients referred for EUS guided biopsy of pancreatic mass; three patients excluded from analysis, final cohort comprised 123 patients (108 malignant and 15 benign. EUS FNA was performed in 72 patients and EUS FNA+TCB was performed in 51 patients. Main outcome measures The diagnostic performance of EUS FNA versus EUS FNA+TCB was compared. Results The sensitivity, specificity and frequency of cases correctly identified for malignancy of FNA alone were 87.1% (54/62, 100% (10/10 and 88.8% (64/72, while for the combination of FNA+TCB they were: 95.7% (44/46, 100% (5/5 and 96.0% (49/51, respectively (P=0.184, 1.000, and 0.193 FNA versus FNA+TCB. No major complication occurred in either group. Conclusion FNA+TCB can be safely performed in selected lesions but sensitivity is not statistically improved over FNA alone (95.7% versus 87.1%.

  14. Wind changes above warm Agulhas Current eddies

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    Rouault, M.; Verley, P.; Backeberg, B.

    2016-04-01

    Sea surface temperature (SST) estimated from the Advanced Microwave Scanning Radiometer E onboard the Aqua satellite and altimetry-derived sea level anomalies are used south of the Agulhas Current to identify warm-core mesoscale eddies presenting a distinct SST perturbation greater than to 1 °C to the surrounding ocean. The analysis of twice daily instantaneous charts of equivalent stability-neutral wind speed estimates from the SeaWinds scatterometer onboard the QuikScat satellite collocated with SST for six identified eddies shows stronger wind speed above the warm eddies than the surrounding water in all wind directions, if averaged over the lifespan of the eddies, as was found in previous studies. However, only half of the cases showed higher wind speeds above the eddies at the instantaneous scale; 20 % of cases had incomplete data due to partial global coverage by the scatterometer for one path. For cases where the wind is stronger above warm eddies, there is no relationship between the increase in surface wind speed and the SST perturbation, but we do find a linear relationship between the decrease in wind speed from the centre to the border of the eddy downstream and the SST perturbation. SST perturbations range from 1 to 6 °C for a mean eddy SST of 15.9 °C and mean SST perturbation of 2.65 °C. The diameter of the eddies range from 100 to 250 km. Mean background wind speed is about 12 m s-1 (mostly southwesterly to northwesterly) and ranging mainly from 4 to 16 m s-1. The mean wind increase is about 15 %, which corresponds to 1.8 m s-1. A wind speed increase of 4 to 7 m s-1 above warm eddies is not uncommon. Cases where the wind did not increase above the eddies or did not decrease downstream had higher wind speeds and occurred during a cold front associated with intense cyclonic low-pressure systems, suggesting certain synoptic conditions need to be met to allow for the development of wind speed anomalies over warm-core ocean eddies. In many cases

  15. Fast-track, ambulatory ultrasound-guided Tru-Cut liver biopsy is feasible and cost-efficient

    DEFF Research Database (Denmark)

    Huang, Chenxi; Lorentzen, Torben; Skjoldbye, Bjørn; Rosenberg, Jacob; Nolsøe, Christian Pállson

    2015-01-01

    -biopsy observation time. METHODS: Patients referred to our institution underwent fast-track ultrasound-guided 18-gauge Tru-Cut liver biopsy procedures. Each single biopsy procedure was followed by a post-procedure observational period of one hour and an additional focused assessment with sonography for trauma before...... throughput, this approach may also reduce diagnostic work-up time and bring financial benefits. Therefore, we encourage the use of this approach in institutions comparable to our own. FUNDING: not relevant. TRIAL REGISTRATION: not relevant....

  16. Análisis de métodos para evaluar el refuerzo a esfuerzo cortante con CFRP en vigas de hormigón armado

    OpenAIRE

    Valcuende Payá, Manuel Octavio; Parra, C; Martínez-Conesa, E.; Garrido, A.

    2012-01-01

    [ES] En este trabajo de investigación se comparan diferentes modelos de cálculo de refuerzo a esfuerzo cortante mediante polímeros reforzados con fibras de carbono (CFRP) clasificados según el modo de fallo. En el diseño del refuerzo se tiene en cuenta la modificación del comportamiento de la viga por el refuerzo. Los estudios muestran que siempre que sea posible, la dirección principal de las fibras debe ser perpendicular a las fisuras de cortante. La contribu...

  17. Endoscopic ultrasonography-guided trucut biopsy for the preoperative diagnosis of peripancreatic castleman's disease: A case report

    Institute of Scientific and Technical Information of China (English)

    Kyoung Hoon Rhee; Sang Soo Lee; Joo Ryung Huh

    2008-01-01

    Castleman's disease (CD) of the pancreas/peripancreas is extremely rare. The recently introduced, endoscopic ultrasonography (EUS)-guided trucut biopsy (TCB) is a useful diagnostic modality for obtaining tissue samples from peripancreatic lesions. However, its role in diagnosing CD remains unknown. We report a case of localized, peripancreatic, hyaline-vascular CD biopsied using EUS. The pathology results were initially interpreted as an extranodal, marginal-zone B-cell lymphoma. However, polymerase chain reaction (PCR) study for the IgH gene rearrangement revealed a polyclonal pattern. We also reviewed the relevant literature. To our knowledge, this is the first illustrated report on EUS-TCB findings of CD with its pathology results of EUS-TCB mimicked a B-cell lymphoma.

  18. Fast-track, ambulatory ultrasound-guided Tru-Cut liver biopsy is feasible and cost-efficient

    DEFF Research Database (Denmark)

    Huang, Chenxi; Lorentzen, Torben; Skjoldbye, Bjørn;

    2015-01-01

    INTRODUCTION: Most institutions perform percutaneous liver biopsy with a post-biopsy patient observation period lasting up to eight hours, which is resource-demanding. This study aimed to evaluate the safety of liver biopsy performed in a fast-track set-up with an only one-hour post-biopsy...... observation time. METHODS: Patients referred to our institution underwent fast-track ultrasound-guided 18-gauge Tru-Cut liver biopsy procedures. Each single biopsy procedure was followed by a post-procedure observational period of one hour and an additional focused assessment with sonography for trauma before...... patient discharge. All patients underwent a clinical follow-up programme at revisit in order to register any delayed onset of major complications. RESULTS: Out of 200 completed biopsy procedures, two major complications were registered post biopsy and they were treated appropriately. All patients were...

  19. Origins and impacts of mesoscale meanders in the Agulhas Current

    Science.gov (United States)

    Elipot, S.; Beal, L. M.

    2014-12-01

    The Agulhas Current (AC) is the western boundary current of the South Indian subtropical gyre and is also the pathway for the inter-basin exchange of water, heat and salt between the Indian Ocean and the Atlantic Ocean, and thus a crucial part of the global overturning circulation of the world ocean. The AC, which otherwise flows stably along the coast of South Africa, undergoes dramatic offshore excursions from its mean path, forming large mesoscale solitary meanders propagating downstream and potentially linked to the leakage of Indian Ocean waters to the South Atlantic. These irregular meander events have been referred to as Natal Pulses.Here we present new observations and analyses of Agulhas meanders using full-depth velocity mooring observations from the Agulhas Current Time series experiment (ACT). Detailed analyses of the in-situ velocity reveal important differences between the behavior of the flow during solitary meander events and during meander events of smaller amplitude. During solitary meanders, an onshore cyclonic circulation and an offshore anticyclonic circulation act in concert to displace the jet offshore, leading to sudden and strong positive conversion of kinetic energy of the mean flow to the meander. In contrast, smaller amplitude meanderings are principally represented by a single cyclonic circulation spanning the entire jet that acts to displace the jet without significantly extracting kinetic energy from the mean flow. Solitary meander events can be traced upstream using satellite altimetry and linked to either Mozambique Channel eddies or Madagascar dipoles, the latter possibly part of a basin-wide pattern of propagating sea level anomalies consistent with Rossby wave dynamics. However, only a small number of these anomalies lead to solitary meanders. Altimetric observations suggest 1.5 meanders per year and show that the two-year period during ACT when no events were observed is unprecedented in the 20-year satellite record.

  20. Spatio-temporal characteristics of Agulhas leakage: a model inter-comparison study

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    Holton, L.; Deshayes, J.; Backeberg, B. C.; Loveday, B. R.; Hermes, J. C.; Reason, C. J. C.

    2016-05-01

    Investigating the variability of Agulhas leakage, the volume transport of water from the Indian Ocean to the South Atlantic Ocean, is highly relevant due to its potential contribution to the Atlantic Meridional Overturning Circulation as well as the global circulation of heat and salt and hence global climate. Quantifying Agulhas leakage is challenging due to the non-linear nature of this process; current observations are insufficient to estimate its variability and ocean models all have biases in this region, even at high resolution . An Eulerian threshold integration method is developed to examine the mechanisms of Agulhas leakage variability in six ocean model simulations of varying resolution. This intercomparison, based on the circulation and thermohaline structure at the Good Hope line, a transect to the south west of the southern tip of Africa , is used to identify features that are robust regardless of the model used and takes into account the thermohaline biases of each model. When determined by a passive tracer method, 60 % of the magnitude of Agulhas leakage is captured and more than 80 % of its temporal fluctuations, suggesting that the method is appropriate for investigating the variability of Agulhas leakage. In all simulations but one, the major driver of variability is associated with mesoscale features passing through the section. High resolution ({<} 1/10°) hindcast models agree on the temporal (2-4 cycles per year) and spatial (300-500 km) scales of these features corresponding to observed Agulhas Rings. Coarser resolution models ({<} 1/4°) reproduce similar time scale of variability of Agulhas leakage in spite of their difficulties in representing the Agulhas rings properties. A coarser resolution climate model (2°) does not resolve the spatio-temporal mechanism of variability of Agulhas leakage. Hence it is expected to underestimate the contribution of Agulhas Current System to climate variability.

  1. Impact of intensified Indian Ocean winds on mesoscale variability in the Agulhas system

    Science.gov (United States)

    Backeberg, Björn C.; Penven, Pierrick; Rouault, Mathieu

    2012-08-01

    South of Africa, the Agulhas Current retroflects and a portion of its waters flows into the South Atlantic Ocean, typically in the form of Agulhas rings. This flux of warm and salty water from the Indian to the Atlantic Ocean (the Agulhas leakage) is now recognized as a key element in global climate. An Agulhas leakage shutdown has been associated with extreme glacial periods, whereas a vigorous increase has preceded shifts towards interglacials. In the absence of a coherent observing system, studies of the Agulhas have relied heavily on ocean models, which have revealed a possible recent increase in Agulhas leakage. However, owing to the high levels of oceanic turbulence, model solutions of the region are highly sensitive to their numerical choices, stressing the need for observations to confirm these important model results. Here, using satellite altimetry observations from 1993 to 2009, we show that the mesoscale variability of the Agulhas system, in particular in the Mozambique Channel and south of Madagascar, has intensified. This seems to result from an increased South Equatorial Current driven by enhanced trade winds over the tropical Indian Ocean. Overall, the intensified mesoscale variability of the Agulhas system is reflected in accelerated eddy propagation, in its source regions as well as the retroflection from which eddies propagate into the South Atlantic Ocean. This suggests that the Agulhas leakage may have increased from 1993 to 2009, confirming previous modelling studies that have further implied an increased Agulhas leakage may compensate a deceleration of meridional overturning circulation associated with a freshening of the North Atlantic Ocean.

  2. Estudio experimental del comportamiento a esfuerzo cortante de vigas de hormigón reforzadas con fibra de carbono

    OpenAIRE

    Picazo Iranzo, Alvaro

    2010-01-01

    Cada vez son más frecuentes en edificación los casos en que es necesario rehabilitar o reforzar una estructura, bien por causas patológicas debidas a fallos o defectos de las obras de hormigón o por el cambio de uso o cargas de un edificio. El refuerzo de elementos estructurales de hormigón sometidos a flexión y cortante, mediante el encolado de bandas de acero con resinas de tipo epoxídico se ha venido empleando en España desde la década de los años setenta, llegando de manera progresiv...

  3. The role of mesoscale eddies in the source regions of the Agulhas Current

    OpenAIRE

    Biastoch, Arne; Krauß, Wolfgang

    1999-01-01

    A primitive equation model to study the dynamics of the Agulhas system has been developed. The model domain covers the South Atlantic and the south Indian Ocean with a resolution of ⅓° in the Agulhas region while coarser outside. It is driven by a climatology of the European Centre for Medium-Range Weather Forecasts. It is shown that the model simulates the Agulhas Current, its retroflection, and the ring shedding successfully. The model results show baroclinic anticyclonic eddies in the Moza...

  4. The importance of flow in the Mozambique Channel to seasonality in the Greater Agulhas Current System

    Science.gov (United States)

    Biastoch, A.; Reason, C. J. C.; Lutjeharms, J. R. E.; Boebel, O.

    The temporal variability of the greater Agulhas Current system has important climatological consequences. Some recent results have suggested that this variability contains a large seasonal component, due to changes in the circulation at latitudes poleward of Madagascar only. A model simulation shows that the contribution of Tropical Surface Water to Agulhas Current waters, via the Mozambique Channel, also has a distinct seasonal characteristic that is brought about by the seasonal wind stress over the tropical Indian Ocean. This simulated flow through the Channel contributes substantially to the seasonality of the Agulhas Current. This model result is shown to be not inconsistent with available hydrographic observations.

  5. Madagascar: A pacemaker for the Agulhas Current system?

    Science.gov (United States)

    Penven, P.; Lutjeharms, J. R. E.; Florenchie, P.

    2006-09-01

    Western boundary currents are driven by zonally integrated wind-stress curl over the width of subtropical basins. This cross-basin integration is interrupted in the South Indian Ocean where Madagascar presents a formidable barrier. Nevertheless, a western boundary current has been thought to exist in the Mozambique Channel, the Mozambique Current. Recent observations have however shown that no such current exists and that the flow in the channel instead consists of a train of eddies. Is this western boundary anomaly due to the presence of Madagascar? We have used a primitive equations model to investigate the flow in the South West Indian Ocean as if there were no Madagascar. We show that a normal, continuous western boundary current is then formed that constitutes a continuum with the Agulhas Current. The presence of Madagascar is shown to affect the frequency of inter-ocean exchange events south of Africa.

  6. The Agulhas-Karoo Geoscience Transect: Structures and processes along the southern African continental margin

    OpenAIRE

    N. Parsiegla; Gohl, K.; G. Uenzelmann-Neben; Jacek Stankiewicz

    2008-01-01

    The southern African continental transform margin is of great interest for the understanding of processes related to continental breakup, transform fault formation and vertical plate motion. Open questions include the cause and consequences for the high topography of southern Africa, neotectonic activity along the Agulhas-Falkland Fracture Zone and the formation of the Outeniqua Basin. As a component of the project “Inkaby yeAfrica”, the 900 km long Agulhas-Karoo Geoscience Transect was carri...

  7. 内镜超声引导下Trucut针活检%Endoscopic Ultrasound Guided Trucut Biopsy (EUS TCB)

    Institute of Scientific and Technical Information of China (English)

    2005-01-01

    EUS is a sensitive method for staging gastrointestinal malignancies and pancreatic lesions. EUS FNA offers a diagnostic accuracy of about 60% - 90% for pancreatic tumors and more than 90% for lymph nodes.There are several limitations of EUS FNA including the need for on - site cytopathology review. In addition, accuracy of cytologic review is hampered by the presence of blood, benign epithelial cells, desmoplasia and well - differentiated tumors. Furthermore, the small biopsy sample and destruction of tissue architecture limits the diagnostic sensitivity for GISTs and lymphomas. Many of these problems can be overcomed with use of EUS trucut biopsy (TCB) needles. These large calibers , cutting needles, acquire larger tissue samples allowing preservation of tissue architecture and histologic examination. Our recently described experience with EUS TCB initially in swine and later humans demonstrated the safety for acquiring histologic tissue representative of the target organs sampled enabling accurate diagnosis. These studies suggested greater diagnostic accuracy of EUS TCB for submucosal mass lesions and lymphoma and potentially the need for fewer needles passes for solid pancreatic neoplasms. In this paper we reviewed the current TCB literature, device design and technique, help trouble shoot potential problems, and offerred opinion as to the utility and role of this new device.

  8. Teoría del hormigón armado tomando en consideración el esfuerzo cortante

    Directory of Open Access Journals (Sweden)

    López Jamar, José Antonio

    1965-09-01

    Full Text Available This article is an advanced summary of the original theory elaborated by Messrs. López Jamar and Tirado Cruz, on compound bending in reinforced concrete parts, taking account of shear effects. The authors assume the structure to be similar to an open web girder. The top chord is the uncracked zone, and is assumed to withstand eccentric compression and shear, in the same way as the uncracked diagonal portions of concrete, between cracks. The bottom chord consists of the longitudinal reinforcement and the complementary series of diagonal uncracked concrete portions (which may no actually exist. These are subject to almost pure tensile loads. A parabolic distribution of longitudinal stresses is supposed initially, and from this the normal and tangential forces on the non cracked zone is precisely obtained. Also assuming a parabolic stress distribution for the stirrups, the efficient stress distribution laws in the cracked zone of the concrete are obtained. These stress laws make it possible to study the partial strength of the cracked and uncracked zones: the latter, because of its intrinsic strength. Thus, the shear is mainly dependent on the relative strain of the cracked zone. There are therefore four possible ways of reaching ultimate failure: simultaneous transversal failure of concrete and stirrups; longitudinal reinforcement failure; compression failure and total failure of the structure. The complex resulting system of equations can be solved by means of computers. Graphical and tabulated results are obtained for the various cases and systems of reinforcement. A first check of the theory has been made by means of a test.Este artículo es un resumen, anticipo de la teoría original de los señores López Jamar y Tirado Cruz, sobre flexión compuesta de piezas de hormigón armado, tomando en consideración el esfuerzo cortante. La pieza se asimila a una viga en celosía; la cabeza superior, constituida por la faja sin fisurar, trabaja a

  9. Análisis de métodos para evaluar el refuerzo a esfuerzo cortante con CFRP en vigas de hormigón armado

    Directory of Open Access Journals (Sweden)

    Parra, C.

    2012-06-01

    Full Text Available Different models of shear-strengthened calculation by means of Carbon Fiber-Reinforced Polymer (CFRP are compared in this investigation works classified according to the way of failure. We take into account the modification of the behavior of the beam for the reinforcement in its design. The surveys show that as long as it is possible the main direction of the fibers must be perpendicular to the shear crakc. The contribution of the reinforcement to the resistance to shear-strengthened of the beam depends on the steel stirrups in the original beam. When the reinforcement strips thickness increases the resistance to shear-strengthened of the beam also increases. This relation tends to be lineal when the beam is not cracks. At last we must state that both the inclination angle of the crack and the shear-strengthened resisted by the reinforcement depend on the inclination angle of the fiber.

    En este trabajo de investigación se comparan diferentes modelos de cálculo de refuerzo a esfuerzo cortante mediante polímeros reforzados con fibras de carbono (CFRP clasificados según el modo de fallo. En el diseño del refuerzo se tiene en cuenta la modificación del comportamiento de la viga por el refuerzo. Los estudios muestran que siempre que sea posible, la dirección principal de las fibras debe ser perpendicular a las fisuras de cortante. La contribución del refuerzo a la resistencia a cortante de la viga depende de los estribos de acero existentes en la viga original. Cuando aumenta el espesor del refuerzo la resistencia a cortante de la viga se incrementa. Esta relación tiende a ser lineal cuando la viga no está fisurada. Por último indicar que tanto el ángulo de inclinación de las fisuras, como el cortante resistido por el refuerzo, dependen del ángulo de inclinación de las fibras.

  10. Agulhas Leakage changes in the Pliocene as a modulator of AMOC strength

    Science.gov (United States)

    Patel, N. P.; Deconto, R. M.; Condron, A.

    2015-12-01

    The leakage of Agulhas Current water into the South Atlantic is now thought to be a major player in global climate change. Its volume is linked to the strength and position of southern westerlies. Past changes in the westerly winds over the southern ocean have been noted on glacial-interglacial timescales, in response to both Northern Hemispheric conditions and changes in Antarctic ice volume. The Pliocene to Pleistocene transition, associated cooling and Northern Hemisphere glaciation may have related to changes in Antarctica and the Southern Ocean, affecting both the position and strength of southern westerly winds. A northward shift in the westerlies, observed in past records of glaciation events, is thought to restrict the flow of warm, salty water from the Indian Ocean into the Atlantic, potentially impacting the Atlantic Meridional Overturning Circulation (AMOC) and North Atlantic SSTs. A weakening of the Agulhas Leakage therefore could transmit changes in the southern hemisphere to the northern hemisphere. Much of the Agulhas leakage is carried in small eddies rotating off the main flow south of Cape Horn. High ocean model resolution (test the effect of a shift in the southern hemisphere westerlies on the Agulhas Leakage, during a past climate (Pliocene) warmer than today. A prescribed perturbation of the winds near South Africa shows a significant increase in Agulhas eddies into the Atlantic. Following this, we have performed longer simulations (> 25 model years) on the simulated Pliocene Ocean reflecting past shifts in the wind field quantify changes in Agulhas Leakage transport and salinity anomalies into the South Atlantic. We then investigate whether there is any corresponding change in North Atlantic Deep Water formation and the overall response of the AMOC from the Agulhas Leakage changes.

  11. The life cycle of a coherent Lagrangian Agulhas ring

    CERN Document Server

    Wang, Y; Olascoaga, M J

    2016-01-01

    We document the long-term evolution of an Agulhas ring detected from satellite altimetry using a technique from nonlinear dynamical systems that enables objective (i.e., observer-independent) eddy framing. Such objectively detected eddies have Lagrangian (material) boundaries that remain coherent (unfilamented) over the detection period. The ring preserves a quite compact material entity for a period of about 2 years even after most initial coherence is lost within 5 months after detection. We attribute this to the successive development of short-term coherent material boundaries around the ring. These boundaries provide effective short-term shielding for the ring, which prevents a large fraction of the ring's interior from being mixed with the ambient turbulent flow. We show that such coherence regain events cannot be inferred from Eulerian analysis. This process is terminated by a ring-splitting event which marks the ring demise, near the South American coast. The genesis of the ring is characterized by a r...

  12. Paleo Agulhas rings enter the subtropical gyre during the penultimate deglaciation

    Directory of Open Access Journals (Sweden)

    P. Scussolini

    2013-04-01

    Full Text Available A maximum in the strength of Agulhas Leakage has been registered at the interface between Indian and South Atlantic oceans during glacial Termination II (T II, presumably transporting the salt and heat necessary to maintain the Atlantic Meridional Overturning Circulation (AMOC at rates similar to the present day. However, it was never shown whether these were effectively incorporated in the South Atlantic gyre, or whether they retroflected into the Indian and/or Southern Oceans. To solve this question, we investigate the presence of paleo Agulhas rings from a sediment core on the central Walvis Ridge, almost 1800 km farther into the Atlantic basin than previously studied. Analysis of a 20 yr dataset from a global ocean circulation model allows us to relate density perturbations, at the depth of the thermocline, to the passage of individual rings over the core site. Using this relation from the numerical model as the basis for a proxy, we generate a time series of δ18O variability of Globorotalia truncatulinoides single specimens, revealing high levels of pycnocline depth variability at the site, suggesting enhanced numbers of Agulhas rings moving into the South Atlantic gyre around and before T II. Our record closely follows the published quantifications of Agulhas Leakage from the east of the Cape Basin, and thus shows that Indian Ocean waters entered the South Atlantic circulation. This provides crucial support to the view of a prominent role of the Agulhas Leakage in the shift from a glacial to an interglacial mode of AMOC.

  13. Refuerzo a cortante de vigas de hormigón armado, mediante laminados de polímeros reforzados con fibras (FRP)

    OpenAIRE

    Pujol, Mireia; Bairán García, Jesús Miguel; Oller Ibars, Eva; Marí Bernat, Antonio Ricardo

    2011-01-01

    En la actualidad, la aplicación de laminados de polímeros reforzados con fibras (FRP) en el campo de la reparación y del refuerzo de estructuras de hormigón resulta cada vez más frecuente. Si bien los mecanismos de rotura están bien definidos a flexión, no sucede lo mismo en el caso del cortante. De acuerdo con la base de datos experimentales recopilada por los autores, existe una gran dispersión entre los resultados obtenidos experimentalmente y los obtenidos analíticamente siguiendo reco...

  14. Comportamiento de vigas de hormigón reforzadas a cortante con tejidos de fibras de carbono o basalto pegados con resina epoxi

    OpenAIRE

    Picazo Iranzo, Alvaro; Cobo Escamilla, Alfonso

    2011-01-01

    Tanto en estructuras de edificación como de obra civil cada día resulta más frecuente la necesidad de su refuerzo, bien por problemas asociados a patologías o por el aumento de las cargas asociado generalmente a un cambio de uso. El objetivo principal de este trabajo ha sido estudiar el comportamiento de vigas de hormigón, reforzadas a cortante con tejidos de fibra de carbono o basalto pegados con resinas epoxi. Para conseguir este objetivo se han planteado objetivos parciales como el a...

  15. Influencia de la distribución de la carga en la capacidad resistente a cortante en elementos sin armadura transversal : estudio teórico y experimental

    OpenAIRE

    Padilla Lavaselli, Patricio S.

    2009-01-01

    Resumen A partir de la aparición de la instrucción de hormigón estructural EHE-98, ha surgido una queja generalizada en el ámbito profesional. Dicha queja está fundamentada en que, con la aparición de dicha normativa, algunos elementos que anteriormente se diseñaban sin armadura de cortante, hoy la requieren. Dicho problema afecta a toda la región europea debido a que las expresiones de la EHE-98 están basadas en las propuestas por el Eurocódigo 2. Para estudiar el problema y poder dar una so...

  16. Ocean-Atmosphere Interaction Over Agulhas Extension Meanders

    Science.gov (United States)

    Liu, W. Timothy; Xie, Xiaosu; Niiler, Pearn P.

    2007-01-01

    Many years of high-resolution measurements by a number of space-based sensors and from Lagrangian drifters became available recently and are used to examine the persistent atmospheric imprints of the semi-permanent meanders of the Agulhas Extension Current (AEC), where strong surface current and temperature gradients are found. The sea surface temperature (SST) measured by the Advanced Microwave Scanning Radiometer-Earth Observing System (AMSR-E) and the chlorophyll concentration measured by the Sea-viewing Wide Field-of-view Sensor (SeaWiFS) support the identification of the meanders and related ocean circulation by the drifters. The collocation of high and low magnitudes of equivalent neutral wind (ENW) measured by Quick Scatterometer (QuikSCAT), which is uniquely related to surface stress by definition, illustrates not only the stability dependence of turbulent mixing but also the unique stress measuring capability of the scatterometer. The observed rotation of ENW in opposition to the rotation of the surface current clearly demonstrates that the scatterometer measures stress rather than winds. The clear differences between the distributions of wind and stress and the possible inadequacy of turbulent parameterization affirm the need of surface stress vector measurements, which were not available before the scatterometers. The opposite sign of the stress vorticity to current vorticity implies that the atmosphere spins down the current rotation through momentum transport. Coincident high SST and ENW over the southern extension of the meander enhance evaporation and latent heat flux, which cools the ocean. The atmosphere is found to provide negative feedback to ocean current and temperature gradients. Distribution of ENW convergence implies ascending motion on the downwind side of local SST maxima and descending air on the upwind side and acceleration of surface wind stress over warm water (deceleration over cool water); the convection may escalate the contrast of

  17. Avaliação microbiológica de agulhas sistêmicas descartáveis de acupuntura

    OpenAIRE

    Flaviana Regina Pimenta; Lara Stefania Netto de Oliveira Leão; Fabiana Cristina Pimenta

    2009-01-01

    A acupuntura é uma técnica invasiva que tem como principal ferramenta o uso de agulhas. Este estudo teve comoobjetivo avaliar a qualidade microbiológica de diferentes marcas de agulhas sistêmicas descartáveis de acupuntura eidentificar os microrganismos contaminantes isolados. Amostra foi composta por 11 marcas, correspondendo a 30lotes diferentes, totalizando 1500 agulhas sistêmicas descartáveis de acupuntura analisadas em Goiânia no ano de2007. Procedeu-se ao teste de esterilidade por meio ...

  18. Análisis de las formulaciones sobre la resistencia a cortante del hormigón

    Directory of Open Access Journals (Sweden)

    Freire Tellado, Manuel J.

    2005-06-01

    Full Text Available In this paper, we analyse all of the formulations stated in the Spanish regulation, which allows to evaluate concrete contribution to a structure shear strength. We also offer a historical review of the different formulations included not only in the Spanish regulation, but also in the current versions of other relevant guidelines; this opens a short discussion on the problem to be considered. Afterwards, we contrast results obtained under the Spanish regulation with those obtained under other rules. A numerical analysis is done parallely on two rectangular sections, one plane (axb and the other being edgeways (bxa. Both have the same dimensions and are under the action of the same bending moment. Finally, the formulations previously stated are applied to a floor concrete wrought; we study different types of resistance on the concrete with three armed solutions for each case, we compare results obtained, and this leads to some curious conclusions.El artículo realiza un análisis de la expresiones de la normativa española que permiten estimar la contribución del hormigón en la resistencia a cortante de una estructura, sugiriendo algunas precisiones, mejoras y refinamientos posibles. Seguidamente se realiza un repaso de las diferentes expresiones que planteó la normativa española a lo largo de su historia y de las versiones actuales de otras normas de reconocido prestigio, realizándose una breve discusión sobre el problema del ancho a considerar. Posteriormente se contrastan los resultados de las formulaciones españolas con los que derivan de las otras normas citadas, análisis que se realiza paralelamente sobre dos secciones, una plana y otra de canto, de iguales dimensiones y sometidas a la actuación del mismo momento flector. Finalmente se aplican las formulaciones anteriores a la sección de un forjado, estudiando hormigones de distinta resistencia con tres soluciones de armado en cada caso, comparándose los resultados obtenidos, y

  19. Acidentes de trabalho com instrumentos perfurocortantes entre os trabalhadores de enfermagem Accidentes de trabajo con instrumentos perforo cortantes entre enfermeros trabajadores Accidents with sharp instruments among nursing workers

    Directory of Open Access Journals (Sweden)

    Leila Maria Mansano Sarquis

    2002-09-01

    Full Text Available O presente estudo analisou os acidentes de trabalho ocorridos com trabalhadores de enfermagem, de um hospital público, provocados por instrumentos perfurocortantes. A instituição campo de estudo foi um hospital público do interior de São Paulo. A população foi composta por 787 trabalhadores de enfermagem. Na coleta de dados foram usados dois instrumentos: o primeiro foi o questionário que se destinou ao levantamento dos dados referentes aos acidentes de trabalho ocorridos no ano de 1996; o segundo foi a entrevista realizada com estes trabalhadores que sofreram acidentes com instrumentos perfurocortantes. Os resultados encontrados mostram a significativa freqüência desse tipo de acidente entre os auxiliares de enfermagem. A interação do trabalhadores de enfermagem com instrumentos perfurocortantes, indica a grande exposição aos riscos biológicos e às graves doenças.El presente estudio analizó los accidentes de trabajo ocurridos con enfermeros trabajadores, de un hospital público, ocasionados por instrumentos perforo cortantes. La institución campo de estudio fue un hospital público del interior de San Pablo. La población fue compuesta por 787 enfermeros trabajadores. En la coleta de datos fueran usados dos instrumentos: el primer fue un cuestionario que se destinó al examen de datos referentes a los accidentes de trabajo ocurridos en el ano de 1996; el segundo fue una cita con estos trabajadores que sufrieron accidentes con instrumentos perforo cortantes. Los resultados mostran la significativa frecuencia de ese tipo de accidente entre los auxiliares de enfermero. La interacción de los enfermeros trabajadores con instrumentos perforo cortantes indica la grande exposición a los riesgos biológicos y a las graves enfermedades.The present study analyzed the accidents happened at work with the nursing staff of a public hospital, provoked by sharp instruments. All the nursing staff composed the study population. In the

  20. Significant Atmospheric Boundary Layer Change Observed above an Agulhas Current Warm Cored Eddy

    OpenAIRE

    C. Messager; Swart, S

    2016-01-01

    The air-sea impact of a warm cored eddy ejected from the Agulhas Retroflection region south of Africa was assessed through both ocean and atmospheric profiling measurements during the austral summer. The presence of the eddy causes dramatic atmospheric boundary layer deepening, exceeding what was measured previously over such a feature in the region. This deepening seems mainly due to the turbulent heat flux anomaly above the warm eddy inducing extensive deep and persistent changes in the atm...

  1. Red Sea Intermediate Water in the source regions of the Agulhas Current

    Science.gov (United States)

    Roman, R. E.; Lutjeharms, J. R. E.

    2009-06-01

    Red Sea Intermediate Water (RSIW) has been shown to move down the Agulhas Current as distinct lenses. It has been assumed that this intermittency is the result of variable input. To clarify and quantify the nature of RSIW contributions from the source regions of the Agulhas Current observations at 15 hydrographic sections were examined using a multi-parameter analysis. In the northern Mozambique Channel RSIW is found to be layer-like, but with patches of distinctly different contributions. In the southern part of the channel the layer-like distribution disappears with RSIW mostly confined within anticyclonic and cyclonic eddies exhibiting varying maximum contributions ranging from 15-20% to 25-30% purity. Net transports across the channel ranged from -0.45 to -0.7 Sv. At the southern tip of Madagascar RSIW contributions exhibited similar purity variability ranging from 10-15% to 15-20%. The net southward transport of RSIW in the East Madagascar Current displayed an even greater variability due to changes in the flux of the undercurrent ranging from negligible to -0.3 Sv. Indications therefore were that the transport of RSIW to the Agulhas Current occurs in both cyclones and anti-cyclones through the Mozambique Channel whilst from the East Madagascar Current it is mostly confined to anti-cyclones. This variability in the inflow was also reflected in the northern part of the Agulhas Current proper. The maximum contributions of RSIW range here from 10-15% to 20-25% purity and net transports from -0.75 to -1.39 Sv off Durban. As it was east of Madagascar RSIW was mostly confined to the slope.

  2. Mesoscale variability study of the Agulhas Current from satellite radar altimetry and a high resolution model

    OpenAIRE

    Backeberg, Bjørn C.

    2006-01-01

    Towards understanding the dynamics and eddy evolving processes in the greater Agulhas Current system, a Hybrid Coordinate Ocean Model (HYCOM) system has been set up to simulation the ocean circulation around Southern Africa in a hindcast experiment. In a region characterised by a general paucity of hydrographic observations, model validation from satellite remote sensing data products play an important role. In particular, radar altimetry observations from satellites are of benefi...

  3. Evaluating two numerical advection schemes in HYCOM for eddy-resolving modelling of the Agulhas Current

    OpenAIRE

    Backeberg, B. C.; Bertino, L.; J. A. Johannessen

    2009-01-01

    A 4th order advection scheme is applied in a nested eddy-resolving Hybrid Coordinate Ocean Model (HYCOM) of the greater Agulhas Current system for the purpose of testing advanced numerics as a means for improving the model simulation for eventual operational implementation. Model validation techniques comparing sea surface height variations, sea level skewness and variogram analyses to satellite altimetry measurements quantify that generally the 4th order advection scheme improves the realism...

  4. The greater Agulhas Current system: an integrated study of its mesoscale variability

    OpenAIRE

    Backeberg, Bjørn C.; Johannessen, Johnny A.; Bertino, Laurent; Reason, Chris J. C.

    2008-01-01

    For the purpose of developing an operational oceanography system for the greater Agulhas Current regime, a high resolution Hybrid Coordinate Ocean Model (HYCOM) has been set in a nested configuration. The intense and complex current regime poses a challenge in modelling. However, access to satellite and in-situ data with strong and persistent signals of the dynamics and mesoscale variability ensure that adequate model validation is feasible. The study concludes that HYCOM reproduces the gener...

  5. Agulhas leakage as a key process in the modes of Quaternary climate changes

    OpenAIRE

    Caley, T.; Giraudeau, J.; Malaize, B.; L. Rossignol; Pierre, C

    2012-01-01

    Heat and salt transfer from the Indian Ocean to the Atlantic Ocean (Agulhas leakage) has an important effect on the global thermohaline circulation and climate. The lack of long transfer record prevents elucidation of its role on climate changes throughout the Quaternary. Here, we present a 1,350-ka accumulation rate record of the planktic foraminiferal species Globorotalia menardii. We demonstrate that, according to previous assumptions, the presence and reseeding of this fauna in the subtro...

  6. Una teoría de la flexión con esfuerzo cortante en piezas de hormigón armado

    Directory of Open Access Journals (Sweden)

    López Jamar, J. A.

    1962-10-01

    Full Text Available En la Monografía número 221, el Instituto Eduardo Torroja de la Construcción y del Cemento ha publicado recientemente el trabajo arriba titulado, original de los ingenieros citados. Creemos constituye un interesante intento de explicar el comportamiento del hormigón armado en el caso de existir esfuerzos cortantes, simultáneamente con la flexión simple o compuesta. Actualmente se están realizando una serie de ensayos de rotura de vigas, en nuestros Laboratorios y bajo el patronato del Instituto, para contrastar esta teoría. Pero como consideramos interesará el asunto a muchos de nuestros lectores, exponemos a continuación un resumen de los principales puntos de aquélla y su comparación con los criterios clásicos que se han venido siguiendo hasta ahora.

  7. Evaluating two numerical advection schemes in HYCOM for eddy-resolving modelling of the Agulhas Current

    Directory of Open Access Journals (Sweden)

    B. C. Backeberg

    2009-02-01

    Full Text Available A 4th order advection scheme is applied in a nested eddy-resolving Hybrid Coordinate Ocean Model (HYCOM of the greater Agulhas Current system for the purpose of testing advanced numerics as a means for improving the model simulation for eventual operational implementation. Model validation techniques comparing sea surface height variations, sea level skewness and variogram analyses to satellite altimetry measurements quantify that generally the 4th order advection scheme improves the realism of the model simulation. The most striking improvement over the standard 2nd order momentum advection scheme, is that the Southern Agulhas Current is simulated as a well-defined meandering current, rather than a train of successive eddies. A better vertical structure and stronger poleward transports in the Agulhas Current core contribute toward a better southwestward penetration of the current, and its temperature field, implying a stronger Indo-Atlantic inter-ocean exchange. It is found that the transport, and hence this exchange, is sensitive to the occurrences of mesoscale features originating upstream in the Mozambique Channel and Southern East Madagascar Current, and that the improved HYCOM simulation is well suited for further studies of these inter-actions.

  8. Evaluating two numerical advection schemes in HYCOM for eddy-resolving modelling of the Agulhas Current

    Directory of Open Access Journals (Sweden)

    B. C. Backeberg

    2009-06-01

    Full Text Available A 4th order advection scheme is applied in a nested eddy-resolving Hybrid Coordinate Ocean Model (HYCOM of the greater Agulhas Current system for the purpose of testing advanced numerics as a means for improving the model simulation for eventual operational implementation. Model validation techniques comparing sea surface height variations, sea level skewness and variogram analyses to satellite altimetry measurements quantify that generally the 4th order advection scheme improves the realism of the model simulation. The most striking improvement over the standard 2nd order momentum advection scheme, is that the southern Agulhas Current is simulated as a well-defined meandering current, rather than a train of successive eddies. A better vertical structure and stronger poleward transports in the Agulhas Current core contribute toward a better southwestward penetration of the current, and its temperature field, implying a stronger Indo-Atlantic inter-ocean exchange. It is found that the transport, and hence this exchange, is sensitive to the occurrences of mesoscale features originating upstream in the Mozambique Channel and southern East Madagascar Current, and that the improved HYCOM simulation is well suited for further studies of these inter-actions.

  9. Evaluating two numerical advection schemes in HYCOM for eddy-resolving modelling of the Agulhas Current

    Science.gov (United States)

    Backeberg, B. C.; Bertino, L.; Johannessen, J. A.

    2009-06-01

    A 4th order advection scheme is applied in a nested eddy-resolving Hybrid Coordinate Ocean Model (HYCOM) of the greater Agulhas Current system for the purpose of testing advanced numerics as a means for improving the model simulation for eventual operational implementation. Model validation techniques comparing sea surface height variations, sea level skewness and variogram analyses to satellite altimetry measurements quantify that generally the 4th order advection scheme improves the realism of the model simulation. The most striking improvement over the standard 2nd order momentum advection scheme, is that the southern Agulhas Current is simulated as a well-defined meandering current, rather than a train of successive eddies. A better vertical structure and stronger poleward transports in the Agulhas Current core contribute toward a better southwestward penetration of the current, and its temperature field, implying a stronger Indo-Atlantic inter-ocean exchange. It is found that the transport, and hence this exchange, is sensitive to the occurrences of mesoscale features originating upstream in the Mozambique Channel and southern East Madagascar Current, and that the improved HYCOM simulation is well suited for further studies of these inter-actions.

  10. Aquatic systems in and adjacent to Agulhas National Park with particular reference to the fish fauna

    Directory of Open Access Journals (Sweden)

    I.A. Russell

    2006-12-01

    Full Text Available The study aimed to determine the distribution and relative abundance of freshwater fishes in and adjacent to Agulhas National Park. Fourteen fish species were collected during surveys carried out in the Heuningnes and Ratel river systems and a variety of endorheic pans from 2003 to 2005. Seven of the species are marine fishes tolerant of low salinity (Mugil cephalus, Liza richardsonii, Monodactylus falciformis, Caffrogobius gilchristi, Rhabdosargus holubi, Solea bleekeri, Gilchristella aestuaria with the remaining seven species being primary freshwater fishes. Three are indigenous, including Pseudobarbus burchelli, Sandelia capensis, and Galaxias zebratus of which two morphological forms were recorded within Agulhas National Park. The remaining four species are invasive aliens (Cyprinus carpio, Lepomis macrochirus, Micropterus salmoides, Micropterus punctulatus. Classification using physico-chemical variables indicated four major wetland groups, with fishes occurring predominantly in the group comprising palustrine, lacustrine and riverine wetlands, and in one instance in a brackish endorheic pan. Management actions which should facilitate conservation of indigenous fishes in the Agulhas region are suggested.

  11. Retroflection from a double-slanted coastline: a model for the Agulhas leakage variability

    Directory of Open Access Journals (Sweden)

    V. Zharkov

    2010-12-01

    Full Text Available The Agulhas leakage to the South Atlantic exhibits a strong anti-correlation with the mass flux of the Agulhas Current. When the Agulhas retroflection is in its normal position near Cape Agulhas, leakage is relatively high and the nearby South African coastal slant (angle of derivation from zonal is very small and relatively invariant alongshore. During periods of strong incoming flux (low leakage, the retroflection shifts upstream to Port Elizabeth or East London, where the coastline shape has a "kink", i.e., the slant changes abruptly from small on the west side, to large (about 55° on the east side. Here, we show that the variability of rings shedding and anti-correlation between Agulhas mass flux and leakage to the South Atlantic may be attributed to this kink.

    To do so, we develop a nonlinear analytical model for retroflection near a coastline that consists of two sections, a zonal western section and a strongly slanted eastern section. The principal difference between this and the model of a straight slanted coast (discussed in our earlier papers is that, here, free purely westward propagation of eddies along the zonal coastline section is allowed. This introduces an interesting situation in which strong slant of the coast east of the kink prohibits the formation and shedding of rings, while the almost zonal coastal orientation west of the kink encourages shedding. Therefore, the kink "locks" the position of the retroflection, forcing it to occur just downstream of the kink. Rings are necessarily shed from the retroflection area in our kinked model, regardless of the degree of eastern coast slant. In contrast, a no-kink model with a coastline of intermediate slant indicates that shedding is almost completely arrested by that slant.

    We suggest that the observed difference in ring-shedding intensity during times of normal retroflection position and times when the retroflection is shifted eastward is due to the change in

  12. Are percutaneous transgastric biopsies using 14-,16- and 18-G Tru-Cut needles safe? An experimental study in the rabbit

    Energy Technology Data Exchange (ETDEWEB)

    Akan, H.; Incesu, L.; Gunes, M. [Ondokuz Mayis University Medical School, Samsun (Turkey). Department of Radiology; Ozen, N.; Gumus, S. [Ondokuz Mayis University Medical School, Samsun (Turkey). Department of Surgery

    1998-05-01

    We evaluated perforation, peritonitis and bleeding after 14-, 16-, 18-G Tru-Cut needles were passed through the stomach in an animal model. Insertions were performed on seven anesthetized rabbits with 18-,16-and 14-G needles simulating the clinical technique. Diluted contrast medium with methylene blue (60mL) was administered through a nasogastric tube after the biopsy. Computed tomography (CT) scanning of the upper abdomen was performed 10 minutes after the insertion for leakage. The abdominal contents were inspected by laparotomy. There was no contrast medium leakage outside the gastrointestinal tract on CT images. Neither methylene blue nor other stomach content leakage was identified by laparotomy, even with manual squeezing. A tiny spot of blood was observed on the serosal surface of the stomach with the 18-G needle passes (five cases), whereas a relatively large haematoma was present with 14-G needle (four cases). Six of the rabbits survived and one died due to an inadvertant aortic injury. The results of the study show that transgastric route with an 1 8-G cutting needle can be used without fear of peritonitis and bleeding. Copyright (1998) Blackwell Science Pty Ltd 19 refs., 1 tab., 1 fig.

  13. Agulhas ring injection into the South Atlantic during glacials and interglacials

    Directory of Open Access Journals (Sweden)

    V. Zharkov

    2008-09-01

    Full Text Available Recent proxies suggest that, at the end of the last glacial, there was a significant increase in the injection of Agulhas rings into the South Atlantic (SA. This brought about a dramatic increase in the salt-influx (from the Indian Ocean into the SA helping re-start the then-collapsed meridional overturning cell (MOC, leading to the termination of the Younger Dryas (YD. Here, we propose a mechanism through which large variations in ring production take place.

    Using nonlinear analytical solutions for eddy shedding, we show that there are restricted possibilities for ring detachment when the coast is oriented in the north-south direction. We define a critical coastline angle below which there is rings shedding and above which there is almost no shedding. In the case of the Agulhas region, the particular shape of the African continent implies that rings can be produced only when the retroflection occurs beyond a specific latitude where the angle is critical. During glaciation, the wind stress curl (WSC vanished at a latitude lower than that of the critical angle, which prohibited the retroflection from producing rings. When the latitude at which the WSC vanishes migrated poleward towards its present day position, the corresponding coastline angle decreased below the critical angle and allowed for a vigorous production of rings.

    Simple process-oriented numerical simulations (using the Bleck and Boudra model are in satisfactory agreement with our results and enable us to affirm that, during the glacials, the behavior of the Agulhas Current (AC was similar to that of the modern East Australian Current (EAC, for which the coastline slant is supercritical.

  14. Significant Atmospheric Boundary Layer Change Observed above an Agulhas Current Warm Cored Eddy

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    C. Messager

    2016-01-01

    Full Text Available The air-sea impact of a warm cored eddy ejected from the Agulhas Retroflection region south of Africa was assessed through both ocean and atmospheric profiling measurements during the austral summer. The presence of the eddy causes dramatic atmospheric boundary layer deepening, exceeding what was measured previously over such a feature in the region. This deepening seems mainly due to the turbulent heat flux anomaly above the warm eddy inducing extensive deep and persistent changes in the atmospheric boundary layer thermodynamics. The loss of heat by turbulent processes suggests that this kind of oceanic feature is an important and persistent source of heat for the atmosphere.

  15. Hydrographic changes in the Agulhas Recirculation Region during the late Quaternary.

    Digital Repository Service at National Institute of Oceanography (India)

    Naik, Dinesh K.; Saraswat, R.; Khare, N.; Pandey, A.C.; Nigam, R.

    –758, 2014 www.clim-past.net/10/745/2014/ doi:10.5194/cp-10-745-2014 © Author(s) 2014. CC Attribution 3.0 License. Climate of the Past O pen A ccess Hydrographic changes in the Agulhas Recirculation Region during the late Quaternary D. K. Naik1, R. Saraswat1..., 1993; Lutjeharms and Ansorge 2001; Quartly et al., 2006). The retroflection depends on the in- ertia of the AC off Africa, wind stress over this region and the bottom topography (Lutjeharms and Ballegooyen, 1988; Le Bars et al., 2012). A distinct...

  16. Aplicabilidade da auriculoterapia com agulhas ou sementes para diminuição de estresse em profissionais de enfermagem

    Directory of Open Access Journals (Sweden)

    Leonice Fumiko Sato Kurebayashi

    2012-02-01

    Full Text Available Este estudo clínico randomizado objetivou avaliar os níveis de estresse na equipe de Enfermagem de um hospital e analisar a efetividade da auriculoterapia com agulhas e sementes. 75 pessoas com escores médio (44/58,7% e alto (31/41,3% de acordo com a Lista de Sintomas de Estresse foram divididas em grupos (controle, agulhas e sementes, que receberam oito sessões nos pontos Shenmen, Rim e Tronco Cerebral e foram avaliados no início, com quatro, oito sessões e follow-up (15 dias. Na análise de variância (ANOVA, constataram-se diferenças entre os grupos, na 3ª avaliação (F=3,963/P=0,023 e follow-up (F=6,136/P=0,003. Tais diferenças foram entre o grupo controle e agulha. Os grupos de intervenção mostraram diferenças (P<0,05 a partir da segunda avaliação, quando comparados dentro do mesmo grupo. Concluiu-se que a auriculoterapia reduziu o estresse em profissionais de enfermagem, com melhores resultados para agulhas do que sementes, em escores altos, com manutenção de efeitos por 15 dias.

  17. Decomposição de agulhas de Pinus pinaster e de folhas de Eucalyptus globulus em regiões do interior e do litoral de Portugal

    OpenAIRE

    Ribeiro, C.; Cortez, N; Martins, A.; Azevedo, António; M. Madeira

    2007-01-01

    Estudou-se, pela metodologia dos litter-bags, a decomposição de agulhas de Pinus pinaster (PP) e de folhas de Eucalyptus globulus (EG), considerando a taxa de decomposição e a dinâmica de libertação dos nutrientes mais relevantes para a sustentabilidade dos sistemas florestais. Os estudos decorreram no litoral da Região Centro (Furadouro, Óbidos), quer com folhas de EG quer com agulhas de PP, no interior da Região Norte (Vila Pouca de Aguiar), com agulhas de PP, e numa situação intermédia com...

  18. Avaliação microbiológica de agulhas sistêmicas descartáveis de acupuntura

    Directory of Open Access Journals (Sweden)

    Flaviana Regina Pimenta

    2009-09-01

    Full Text Available A acupuntura é uma técnica invasiva que tem como principal ferramenta o uso de agulhas. Este estudo teve comoobjetivo avaliar a qualidade microbiológica de diferentes marcas de agulhas sistêmicas descartáveis de acupuntura eidentificar os microrganismos contaminantes isolados. Amostra foi composta por 11 marcas, correspondendo a 30lotes diferentes, totalizando 1500 agulhas sistêmicas descartáveis de acupuntura analisadas em Goiânia no ano de2007. Procedeu-se ao teste de esterilidade por meio de técnica asséptica, distribuindo as agulhas em tubo de ensaiocontendo água peptonada, incubados à 37ºC por 21 dias. As amostras com contaminação visível foram semeadas emplacas de ágar sangue para o isolamento microbiano. As colônias desenvolvidas foram caracterizadas macro emicroscopicamente (coloração de Gram e, posteriormente, realizado testes bioquímicos para identificação dasespécies isoladas. A contaminação microbiana foi detectada em 13 (0,86% das 1500 agulhas analisadas,pertencentes a seis marcas, sem alcançar, no entanto, significância estatística. Os microrganismos identificados forambacilos Gram positivos, Micrococcus sp e estafilococos coagulase negativa. Verificou-se um número reduzido deagulhas contaminadas, sem significância estatística, portanto, essas marcas podem ser consideradas seguras para ouso nos procedimentos de acupuntura.

  19. Agulha (Potiguar Basin): an old field with exploitation new ideas; Agulha (Bacia Potiguar): um velho campo com novas ideias de explotacao

    Energy Technology Data Exchange (ETDEWEB)

    Oliveira, Diogenes C. de; Rodrigues, Luis G. [PETROBRAS, Natal, RN (Brazil)

    2004-07-01

    The integrated reservoir analysis of the Agulha field has led to several alternative actions to improve oil recovery, despite the fact that the field has already produced more than 45% of the currently mapped oil in place in nearly three decades. Studies were carried out taking into account not only elements of production behavior, but also the geologic aspects of the productive zones. Among various proposed actions, the following can be outlined: change of the water injection quota; workover for improvement of the swept efficiency; modification of the production schedule of some wells; improvement on the efficiency of the gas lift system. Additionally, the possibility that some wells be systematically producing from some hydrocarbon accumulations in volcanic rocks (not classified as reservoir yet), which is feeding traditional turbidities reservoirs is also investigated. The use of geochemical saturation, image and cement logs may lead to identify new oil producing horizons, including non-conventional reservoirs. In order to support new ideas on reservoir geometry and subsequent modeling, a new seismic acquisition is proposed. (author)

  20. KAPEX RAFOS float data report 1997 - 1999. Pt. A. The Agulhas- and South Atlantic current components

    Energy Technology Data Exchange (ETDEWEB)

    Boebel, O.; Anderson-Fontana, S.; Lazarevich, P.; Prater, M.; Rossby, T. [Rhode Island Univ., Narragansett, RI (United States). Graduate School of Oceanography; Schmid, C.; Zenk, W. [Institut fuer Meereskunde an der Univ. Kiel (Germany); Ansorge, I.; Lutjeharms, J. [Cape Town Univ. (South Africa). Dept. of Oceanography

    2000-10-01

    This data report presents trajectories and corresponding in-situ data for all acoustically tracked RAFOS floats that were deployed within the Agulhas and the South Atlantic Current components of KAPEX. KAPEX stands for Cape of Good Hope Experiment, Kaap die Goeie Hoop Eksperimente or Kap der Guten Hoffnung Experiment in the three languages of the participating authors. The objective of the program was to study the interocean exchange of subsurface waters south of Africa between the Atlantic and the Indian Oceans. A total of 92 floats were deployed during four cruises at depths between 100 - 1200 m during March 1997 and June 1998. It is the first time that eddy-resolving floats are used to measure ocean flow patterns at intermediate and thermocline levels off southern Africa. (orig.)

  1. Wave-current interaction in the northern Agulhas Current and shipping safety

    Science.gov (United States)

    Uys, Louw

    2015-04-01

    The Agulhas Current along the south east coast of South Africa is well known for severe wave conditions and the occurrence of rogue waves. The statistical probability of rogue wave occurrence is a well-known topic, but the occurrence of rogue waves cannot be predicted. Similarly, interaction between the Agulhas Current and wave fields emanating from the south west is a known phenomenon, which results in the creation of modified waves that could be different from those predicted by standard models. Although this modelled interaction can contribute much to the research on rogue waves, the enhancement or attenuation of wave fields due to wave-current interaction, is seen as a stand-alone phenomenon. Currently, standard models generating wave field prediction do not make provision for the interaction between waves and currents. Modelling the wave-current interaction in a main shipping route and providing the results thereof for use in the shipping industry, is a necessity not widely available yet. This area spans a grid of 800 km by 240 km between Richards Bay in the north and Port Elizabeth in the south. Using a conventional model in an area that it was not necessarily intended for, can contribute significantly towards knowledge expansion in this field. The SWAN model is a near shore wave model that is widely used in the field of coastal engineering. This readily available model provides for wave-current interaction and its limited resource requirements makes it ideal to supply information on wave interaction to the shipping community. Although this may not be seen to be the best model to provide a final accurate product of wave interaction prediction to the shipping community, it does serve to provide a very good baseline for the provision of safety information. This safety information can be produced and used for the safe routing of ships as well as in the ship design process during the determination of Response Amplitude Operators (RAO).

  2. Influencia del contenido de finos del hormigón en la respuesta estructural a flexión y cortante de vigas de hormigón armado

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    Ferreira, D.

    2015-09-01

    Full Text Available This paper presents an experimental study on the flexural and shear behavior of reinforced concrete beams with a fines content (275 kg/m3 higher than the limit value allowed by the Spanish Concrete Code EHE-08 (175 kg/m3. In the studied range, the fines content scarcely affected the flexural response. The shear strength of the beams with a high content of fines was lower than that of the beams cast with conventional concrete, especially for those with a high longitudinal internal reinforcement ratio and with transversal stirrups, where the reduction of the ultimate load was up to 23 %. Such a reduction is considered due to the reduction of mechanical properties of concrete and that of the aggregate interlock along the crack length. Finally, the experimental results have allowed verifying a numerical model for the non-linear analysis of RC members to accurately predict the influence of the amount of fine aggregate on the structural response.Este artículo presenta un estudio experimental sobre el comportamiento a flexión y cortante de vigas de hormigón armado con un contenido de finos (275 kg/m3 superior al límite permitido por la Instrucción EHE-08 (175 kg/m3. En el rango estudiado, el contenido de finos apenas afectó a la respuesta a flexión. La resistencia a cortante de vigas con alto contenido de finos fue menor que la de las vigas de hormigón convencional, en especial para las vigas con cuantía alta de armadura longitudinal y con armadura de cortante, con una reducción de hasta el 23 % en la carga última. Esta reducción se considera debida a la disminución de propiedades mecánicas del hormigón que afecta especialmente al cortante resistido por fricción en la fisura. Por último, los ensayos realizados han permitido verificar un modelo numérico de análisis no lineal evolutivo para predecir el comportamiento de estructuras de hormigón con distintos contenidos de finos.

  3. Substituição da agulha isolada para eletroneuroestimulação pela agulha metálica de cateter intravenoso, na verificação da punção epidural, em cães Replacement of an insulated electric neurostimulation spinal needle with an intravenous catheter metal needle to confirm correct epidural puncture in dogs

    OpenAIRE

    E.A. Tudury; T.H.T. Fernandes; M.L. Figueiredo; J.A.A. Gomes; B.M. Araújo; M.A. Bonelli; A.C. Silva

    2013-01-01

    Utilizou-se o eletroneuroestimulador como um meio adequado para confirmação do posicionamento da ponta de agulhas isoladas no espaço epidural lombossal, por meio de pequenas estimulações elétricas que provocam contrações dos músculos inervados, empregando-se agulha de cateter intravenoso em vez de agulha isolada para a eletroneuroestimulação. Foram utilizados 40 cães para procedimentos cirúrgicos ortopédicos, abdominais ou retroumbilicais que necessitassem de bloqueio epidural. Durante a intr...

  4. Ocorrência de acidente de trabalho por materiais perfurocortantes e fluidos biológicos em estudantes e trabalhadores da saúde de um hospital escola de Brasília Frecuencia de accidentes del trabajo causados por instrumentos puntiagudo-cortantes y fluidos biológicos entre estudiantes y personal de un hospital escuela de la ciudad de Brasilia Occurrence of work accidents caused by sharp-edged hollow-pointed equipment and biological fluids among medical students and health personnel in a Brasília university hospital

    Directory of Open Access Journals (Sweden)

    Helena Eri Shimizu

    2002-12-01

    Full Text Available estudo teve por objetivo verificar e analisar a ocorrência de acidentes de trabalho causados por materiais perfurocortantes e fluidos biológicos em estudantes e trabalhadores da área da saúde. Foi realizado em um hospital-escola de Brasilia. A coleta de dados foi feita a partir dos registros de acidentes de trabalho mantidos pela Comissão de Controle de Infecção Hospitalar e referentes ao período de agosto de 1998 a junho de 2000. Verificou-se que 117 pessoas sofreram acidentes de trabalho, em sua grande maioria causados por agulhas. Concluiu-se que existe a necessidade de melhoria nos sistemas de prevenção de acidentes na instituição.El objetivo del estudio fue el de verificar y analizar la frecuencia de accidentes del trabajo causados por instrumentos puntiagudo-cortantes entre estudiantes y personal de un hospital escuela de la ciudad de Brasilia. Los datos, recogidos de los registros de accidentes del trabajo de la Comisión de Control de Infección Hospitalaria, corresponden al periodo entre agosto de 1998 y junio de 2000. Se verifico que 117 personas sufrieron accidentes del trabajo, en su gran mayoría causados por agujas. Se llegó a la conclusión de que es necesario mejorar el sistema de prevención de accidentes en dicha institución.The objective of the study was to check and analyze the occurrence of work accidents caused by sharp-edged hollow-pointed equipment and biological fluids among medical students and health personnel. It was carried out in a Brasilia university hospital. The data were collected from records of work accidents kept by the Hospital Infection Control Committee, from August 1998 to June 2000. It has turned out that 117 persons were victims of work accidents, the vast majority of them caused by needles. The study has reached the conclusion that the accident prevention system must be improved at the above mentioned hospital.

  5. Inter-comparison studies between high-resolution HYCOM simulation and observational data: The South Atlantic and the Agulhas leakage system

    Science.gov (United States)

    Castellanos, P.; Campos, E. J. D.; Giddy, I.; Santis, W.

    2016-07-01

    Statistical analyses and model-data inter-comparisons are performed to evaluate the model's ability to reproduce the dynamics in the upper layers (water in the southeastern Atlantic. Furthermore, linear trends found in the transport time-series in the North Brazil Current, and the South Equatorial Current were seen to correspond with increasing trends of the warmer water from the Agulhas Current into South Atlantic. The integrated transport during the period 1960-2010, shows an increase in westward changes in the large-scale circulation south of Africa are show in the negative trends indicate a widening of the "Agulhas gap" and increase in westward volume transport since 1980. It is therefore suggested that variability in the Agulhas System on the last two decades is affecting the dynamic in the South Atlantic, namely the temperature and the volume transport, reach the tropical region of the Atlantic.

  6. Assimilating along-track SLA data using the EnOI in an eddy resolving model of the Agulhas system

    Science.gov (United States)

    Backeberg, Björn C.; Counillon, François; Johannessen, Johnny A.; Pujol, Marie-Isabelle

    2014-08-01

    The greater Agulhas Current is one of the most energetic current systems in the global ocean. It plays a fundamental role in determining the mean state and variability of the regional marine environment, affecting its resources and ecosystem, the regional weather and the global climate on a broad range of temporal and spatial scales. In the absence of a coherent in-situ and satellite-based observing system in the region, modelling and data assimilation techniques play a crucial role in both furthering the quantitative understanding and providing better forecasts of this complicated western boundary current system. In this study, we use a regional implementation of the Hybrid Coordinate Ocean Model and assimilate along-track satellite sea level anomaly (SLA) data using the Ensemble Optimal Interpolation (EnOI) data assimilation scheme. This study lays the foundation towards the development of a regional prediction system for the greater Agulhas Current system. Comparisons to independent in-situ drifter observations show that data assimilation reduces the error compared to a free model run over a 2-year period. Mesoscale features are placed in more consistent agreement with the drifter trajectories and surface velocity errors are reduced. While the model-based forecasts of surface velocities are not as accurate as persistence forecasts derived from satellite altimeter observations, the error calculated from the drifter measurements for eddy kinetic energy is significantly lower in the assimilation system compared to the persistence forecast. While the assimilation of along-track SLA data introduces a small bias in sea surface temperatures, the representation of water mass properties and deep current velocities in the Agulhas system is improved.

  7. Changing surface water conditions for the last 500 ka in the Southeast Atlantic: Implications for variable influences of Agulhas leakage and Benguela upwelling

    Science.gov (United States)

    Petrick, Benjamin F.; McClymont, Erin L.; Marret, Fabienne; Meer, Marcel T. J.

    2015-09-01

    The Southeast Atlantic Ocean is an important component of global ocean circulation, as it includes heat and salt transfer into the Atlantic through the Agulhas leakage as well as the highly productive Benguela upwelling system. Here we reconstruct sea surface temperatures (SSTs) from Ocean Drilling Program (ODP) Site 1087 in the Southeast Atlantic to investigate surface ocean circulation patterns during the late Pleistocene (0-500 ka). The UK'37 index and dinoflagellate cyst assemblages are used to reconstruct SSTs, δDalkenone is used to reconstruct changes in sea surface salinity, and mass accumulation rates of alkenones and chlorine pigments are quantified to detect changing marine export productivity. The greatest amplitude of SST warming precedes decreases in benthic δ18O and therefore occurs early in the transition from glacials to interglacials. The δDalkenone, as a salinity indicator, increases before SSTs, suggesting that the pattern of Agulhas leakage is more complex than suggested by SST proxies. Marine isotope stage (MIS) 10 shows an anomalous pattern: it is marked by a pronounced increase in chlorine concentration, which may be related to enhanced/expanded Benguela upwelling reaching the core site. We find no evidence of an absence of Agulhas leakage throughout the record, suggesting that there is no Agulhas cutoff even during MIS 10. Finally, the ODP Site 1087 record shows an increasing strength of Agulhas leakage towards the present day, which may have impacted the intensity of the Atlantic meridional overturning circulation. As a result, the new analyses from ODP Site 1087 demonstrate a complex interaction between influences of the Benguela upwelling and the Agulhas leakage through the late Pleistocene, which are inferred here to reflect changing circulation patterns in the Southern Ocean and in the atmosphere.

  8. Capacidad Resistente a Flexión y Cortante de Vigas de Acero Mediante la Aplicación Mathcad Flexure Resistance and Shear Capacity of Steel Beams using Mathcad

    Directory of Open Access Journals (Sweden)

    R. Cedeño-Rosete

    2005-01-01

    Full Text Available Se presenta la implementación de un programa de cómputo para determinar la capacidad resistente a flexión y cortante de perfiles de acero. La metodología se basa en el criterio de diseño Factores de Carga y Resistencia establecida en el reglamento del Instituto Americano de Construcción en Acero (AISC. Se generan hojas de cálculo en la aplicación Mathcad de fácil utilización. Se plantean dos ejemplos de vigas de acero obteniendo su capacidad resistente a flexión y cortante para cargas uniformes y concentradas y se comparan los resultados con las acciones últimas especificadas. El programa también cumple las funciones de diseño estructural permitiendo al usuario obtener el perfil más económico para la solución de un problema. La aplicación resulta ser un material de interés práctico profesional y de utilidad didáctica para cursos de diseño en acero.A computer program was developed to determine the flexure and shear resistance capacity of steel beams. The methodology was based on the Load Resistance Factor Design (LRFD criteria of the American Institute of Steel Construction code (AISC. Easy to use working spreadsheets were developed using Mathcad. Two examples are solved for steel beams subjected to uniform and concentrated loads, comparing their flexural and shear resistance capacities under these loads. The program also fulfills structural design features allowing the user to obtain the most economic steel shape to solve a problem. The resultant application is of practical professional interest and also serves as additional teaching material in courses of steel design.

  9. Punção da fístula arteriovenosa com a técnica em casa de botão com agulha romba Arteriovenous fistula cannulation by buttonhole technique using dull needle

    Directory of Open Access Journals (Sweden)

    Manuel Carlos Martins de Castro

    2010-09-01

    Full Text Available INTRODUÇÃO: A canulação da fístula arteriovenosa (FAV pode ser realizada pelas técnicas de punção por área, rotatória ou em casa de botão (CB; entretanto, a técnica ideal ainda não foi estabelecida. OBJETIVO: Avaliar as dificuldades e complicações na introdução da técnica de punção em CB em FAV construída com veia nativa. MÉTODOS: 16 pacientes com idade de 57±14 anos, em hemodiálise há 63±38 meses foram submetidos à punção em CB. Na fase de formação do túnel (T, as punções foram feitas com agulha cortante (AC e na fase de manutenção com agulha romba (AR. Nas duas fases, os pacientes foram avaliados para a intensidade da dor em uma escala de 0 a 10. RESULTADOS: O nº de sessões de HD para formação do T foi de 9,5 ± 1,5 e o número de sessões na fase de manutenção foi de 29,7 ± 0,8. Nas 152 HD para formação do T não ocorreram complicações significativas. Durante 475 HD com AR as complicações foram: resistência na punção (7,6%, punção com AC por opção do puncionador (5,7%, troca de AR para AC durante a punção (4,2% e sangramento local durante a HD (0,8%. Um paciente necessitou antibioticoterapia. A mediana do índice de dor foi 4 na fase de formação do T e 2 na fase de manutenção. Os valores de Kt/V pré- e pós-alteração na técnica de punção não foram diferentes (1,48 ± 0,27 e 1,45 ± 0,23. CONCLUSÃO: A implantação da punção em CB com AR é tecnicamente fácil, apresenta poucas complicações, reduz a dor e não induz variação na dose de diálise.INTRODUCTION: Cannulation of arteriovenous fistula (AVF may be performed by the following techniques: area puncture, rope ladder, or buttonhole. The ideal technique has not yet been established. OBJECTIVE: To assess the complications and difficulties of introducing the buttonhole (BH technique for cannulation of AVF created with a native vein in a dialysis unit. METHODS: Sixteen patients (mean age, 57 ± 14 years undergoing

  10. Influences of the Agulhas Current on South African terrestrial climate as inferred from speleothem stable isotope records

    Science.gov (United States)

    Braun, K.; Bar-Matthews, M.; Ayalon, A.; Marean, C.; Herries, A. I. R.; Zahn, R.; Matthews, A.

    2012-04-01

    South African (SA) climate is strongly influenced by the circulation systems surrounding the subcontinent. The warm tropical Agulhas Current provides large amounts of moisture, transported onshore by south-easterly trade winds during summer. As the trade wind shifts north during winter, the south-western tip of SA is especially affected by temperate westerlies. High amounts of rainfall from the Benguela region off the west coast then only affect the very south-west of the country. This seasonal pattern creates a highly variable terrestrial climate, characterized by strong E-W gradients in the seasonal distribution and amount of rainfall. As summer and winter rain is derived from sources with different properties (density, salinity, temperature), the rainfall also displays seasonal isotopic compositional variations, as for example the present mean δ18O of rainfall in Mossel Bay located in the transition region varies from ~0.13‰ in January to -6.05‰ in July. Vegetation type (C3 vs C4) also follows the rainfall regime with C4 vegetation dominating in the summer rainfall region. As part of the GATEWAYS project, speleothems are used as an excellent, high resolution, precisely dated archive of terrestrial paleoenvironmental conditions[1]. This study focuses on a speleothem record from Crevice Cave on the South African south coast (near Mossel Bay), covering the interval between ~111 and ~53 ka[1,2]. At present, the area is influenced by both summer and winter rainfall, and has mostly C3 type vegetation. Variations in the past show more positive δ18O and δ13C values in the interval corresponding to the glacial MIS 4 and indicate increased summer rainfall and C4 vegetation. This contradicts the common assumption that MIS 4 was characterized by a northward shift of the climatic belts over SA and an increase of winter rainfall and C3 vegetation in the cave area[3]. Comparison of the record to marine sediment cores from the Agulhas Retroflection area[4] and the Cape

  11. Terapia alternativa para microvarizes e telangiectasias com uso de agulha Alternative therapy for microvarices and telangiectasias with use of needle

    Directory of Open Access Journals (Sweden)

    Raimundo Rosendo de Oliveira

    2007-03-01

    Full Text Available CONTEXTO: O desenvolvimento de terapia alternativa à convencional para a destruição de microvarizes e telangiectasias sem o uso de produtos químicos tem como objetivo reduzir os efeitos colaterais, faz uso de agulha para lise mecânica dos vasos e tem como modelo experimental galinhas da linhagem Lohmann Brown. OBJETIVO: Elaborar uma nova técnica, desenvolvendo um tratamento alternativo, sem uso de produtos químicos, objetivando a redução dos efeitos colaterais. MÉTODOS: Foram utilizadas 30 galinhas da linhagem Lohmann Brown, sendo que 15 foram submetidas ao método convencional de tratamento de microvarizes e telangiectasias (grupo-controle e as outras 15 receberam o tratamento experimental proposto (grupo experimental. O grupo experimental foi tratado com agulha de lise vascular, percorrendo todo o trajeto dos vasos escolhidos em punções escalonadas até que todo o vaso ser atingido. O grupo-controle foi tratado com oleato de monoetanolamina e glicose a 50%, puncionando-se o vaso com agulha 13 x 3 mm e injetando-se, em média, 0,3 mL da solução em cada vaso. RESULTADOS: Dos 50 vasos tratados no grupo experimental, dois apresentaram recidiva total, cinco apresentaram recidiva parcial, e 43 apresentaram destruição (lise satisfatória; enquanto que, no grupo-controle, dos 51 vasos tratados, quatro apresentaram recidiva total, 12, recidiva parcial, 22, destruição satisfatória, e em 13 ocorreu endurecimento de trajeto. CONCLUSÃO: O presente estudo demonstrou que o método experimental proposto, com uso de agulha de lise vascular, possui mais eficiência no tratamento de microvarizes se comparado com o método convencional, devido à redução das recidivas e à ausência de hipercromia de trajeto endurecido.BACKGROUND: The development of an alternative to the conventional therapy for microvarices and telangiectasias without using chemical products aims at reducing side effects, using a needle for mechanical lysis of vessels. It

  12. Ocean Virtual Laboratory: A New Way to Explore Multi-Sensor Synergy Demonstrated over the Agulhas Region

    Science.gov (United States)

    Collard, F.; Quartly, G. D.; Konik, M.; Johannessen, J. A.; Korosov, A.; Chapron, B.; Piolle, J.-F.; Herledan, S.; Darecki, M.; Isar, A.; Nafornita, C.

    2015-12-01

    Ocean Virtual Laboratory is an ESA-funded project to prototype the concept of a single point of access for all satellite remote-sensing data with ancillary model output and in situ measurements for a given region. The idea is to provide easy access for the non-specialist to both data and state-of-the-art processing techniques and enable their easy analysis and display. The project, led by OceanDataLab, is being trialled in the region of the Agulhas Current, as it contains signals of strong contrast (due to very energetic upper ocean dynamics) and special SAR data acquisitions have been recorded there. The project also encourages the take up of Earth Observation data by developing training material to help those not in large scientific or governmental organizations make the best use of what data are available. The website for access is: http://ovlproject.oceandatalab.com/

  13. Profile and bottle data collected on the RV Melville (cruise Vancouver 06) from the Agulhas-South Atlantic Thermohaline Transport Experiment (ASTTEX) in the Atlantic Ocean from 20030102 to 20030115 (NODC Accession 0074001)

    Data.gov (United States)

    National Oceanic and Atmospheric Administration, Department of Commerce — Introduction: The Agulhas-South Atlantic Thermohaline Experiment (ASTTEX) examined the fluxes of heat, salt and mass entering the South Atlantic ocean via the...

  14. Acurácia da punção aspirativa por agulha fina e da punção por agulha grossa no diagnóstico de lesões mamárias Diagnostic accuracy of the fine needle aspiration cytologyand core needle biopsy as a diagnostic method for breast lesions

    OpenAIRE

    Patrícia Pontes Frankel; Viviane Fernandes Esteves; Luiz Claudio Santos Thuler; Roberto José da Silva Vieira

    2011-01-01

    OBJETIVO: avaliar a acurácia da punção aspirativa por agulha fina (PAAF) e da punção por agulha grossa (PAG) no diagnóstico da lesão mamária e do câncer de mama. MÉTODOS: trata-se de um estudo transversal, retrospectivo e descritivo, baseado na busca em prontuários médicos. A PAAF e a PAG foram realizadas sequencialmente, como rotina do serviço de Mastologia. Os dois procedimentos percutâneos foram realizados em 233 pacientes, no período de março de 2005 a fevereiro de 2007. Foram incluídas m...

  15. Proceso de formación de una red regional: Región turística de las Agulhas Negras - RJ - Brasil The Process of Construction of Tourism Regional networks: The Tourist Region of Agulhas Negras-RJ, Brazil

    Directory of Open Access Journals (Sweden)

    Aguinaldo Cesar Fratucci

    2011-12-01

    Full Text Available Este artículo se propone analizar el proceso de constitución de las redes regionales de turismo establecidas a partir de la estructuración de territorios-redes a escala regional. Basándose en las categorías de territorio-red y redes regionales y en la región turística de las Agulhas Negras-RJ, Brasil, como objeto empírico de observación, este estudio propone que la consolidación de redes regionales de turismo puede estructurar nuevas instancias público-privadas de gestión del ordenamiento del desarrollo turístico; como es el caso del CONRETUR de las Agulhas Negras. Se realizó una investigación estructurada principalmente a partir de la técnica de la observación participante, además de entrevistas personales y por medios electrónicos.This article aims at analyzing the process of constitution of tourism regional networks established from the structuring of networks-territories in regional scale. Having as theoretical basis territory-network and regional network basis as well as the tourist region of Agulhas Negras-RJ as empirical object, this text proposes that the consolidation of tourism regional networks may structure new public-private instances of tourist development reordering, as in the case of CONRETUR Agulhas Negras - RJ. In order to do that, structured researches have been used, mainly from the technique of participant observation, besides personal interviews and electronic means.

  16. Strontium isotope investigation of ungulate movement patterns on the Pleistocene Paleo-Agulhas Plain of the Greater Cape Floristic Region, South Africa

    Science.gov (United States)

    Copeland, Sandi R.; Cawthra, Hayley C.; Fisher, Erich C.; Lee-Thorp, Julia A.; Cowling, Richard M.; le Roux, Petrus J.; Hodgkins, Jamie; Marean, Curtis W.

    2016-06-01

    Middle Stone Age sites located within the Greater Cape Floristic Region on the South African southern coast have material culture with early evidence for key modern human behaviors such as projectile weaponry, large animal hunting, and symbolic behavior. In order to interpret how and why these changes evolved, it is necessary to understand their ecological context as it has direct relevance to foraging behavior. During periods of lowered sea level, a largely flat and vast expanse of land existed south of the modern coastline, but it is now submerged by higher sea levels. This exposed area, the Paleo-Agulhas Plain, likely created an ecological context unlike anything in the region today, as evidenced by fossil assemblages dominated by migratory ungulates. One hypothesis is that the Paleo-Agulhas Plain supported a migration ecosystem of large grazers driven by summer rainfall, producing palatable forage during summer in the east, and winter rainfall, producing palatable forage during winter in the west. Alternatively, ungulates may have been moving from the coastal plain in the south to the interior north of the Cape Fold Mountains, as observed for elephants in historic times. In this study, we assess ungulate movement patterns with inter- and intra-tooth enamel samples for strontium isotopes in fossil fauna from Pinnacle Point sites PP13B and PP30. To accomplish our goals we created a bioavailable 87Sr/86Sr isoscape for the region by collecting plants at 171 sampling sites and developing a geospatial model. The strontium isotope results indicate that ungulates spent most of their time on the Paleo-Agulhas Plain and avoided dissected plain, foothill, and mountain habitats located more than about 15 km north of the modern coastline. The results clearly exclude a north-south (coastal-interior) movement or migration pattern, and cannot falsify the east-west movements hypothesized in the south coast migration ecosystem hypothesis.

  17. Modelo experimental de cultura primária de melanoma metastático por punção aspirativa de agulha fina

    Directory of Open Access Journals (Sweden)

    Oliveira Andrea Fernandes de

    2005-01-01

    Full Text Available OBJETIVO: Estabelecer um modelo experimental de cultura primária de melanoma metastático por punção aspirativa por agulha fina (PAAF. MÉTODOS: Duas culturas primárias de células de melanoma metastático através de PAAF foram desenvolvidas a partir de pacientes submetidos à excisão de lesões metastáticas e identificadas por imunohistoquímica utilizando os marcadores S-100 e MB-45, específicos para melanoma. RESULTADOS: O diagnóstico da cultura foi confirmado através da imunohistoquímica. A técnica oferece vantagens como pequena morbidade e invasibilidade, além do mais, a mesma lesão pode ser puncionada seqüencialmente durante o tratamento do doente. CONCLUSÃO: O estabelecimento de cultura primária de melanoma metastático a partir de punção aspirativa por agulha fina mostrou-se uma técnica viável.

  18. Decomposição de agulhas de Pinus pinaster e de folhas de Eucalyptus globulus em regiões do interior e do litoral de Portugal Decomposition of needle litter of Pinus pinaster and leaf litter of Eucalyptus globulus in the littoral and inland areas of Portugal

    OpenAIRE

    Ribeiro, C.; Cortez, N; Martins, A.; Azevedo, A.; M. Madeira

    2007-01-01

    Estudou-se, pela metodologia dos litter-bags, a decomposição de agulhas de Pinus pinaster (PP) e de folhas de Eucalyptus globulus (EG), considerando a taxa de decomposição e a dinâmica de libertação dos nutrientes mais relevantes para a sustentabilidade dos sistemas florestais. Os estudos decorreram no litoral da Região Centro (Furadouro, Óbidos), quer com folhas de EG quer com agulhas de PP, no interior da Região Norte (Vila Pouca de Aguiar), com agulhas de PP, e numa situação intermédia com...

  19. Substituição da agulha isolada para eletroneuroestimulação pela agulha metálica de cateter intravenoso, na verificação da punção epidural, em cães Replacement of an insulated electric neurostimulation spinal needle with an intravenous catheter metal needle to confirm correct epidural puncture in dogs

    Directory of Open Access Journals (Sweden)

    E.A. Tudury

    2013-02-01

    Full Text Available Utilizou-se o eletroneuroestimulador como um meio adequado para confirmação do posicionamento da ponta de agulhas isoladas no espaço epidural lombossal, por meio de pequenas estimulações elétricas que provocam contrações dos músculos inervados, empregando-se agulha de cateter intravenoso em vez de agulha isolada para a eletroneuroestimulação. Foram utilizados 40 cães para procedimentos cirúrgicos ortopédicos, abdominais ou retroumbilicais que necessitassem de bloqueio epidural. Durante a introdução gradativa da agulha no canal vertebral lombossacral, estímulos elétricos de 1,5 a 0,5mA foram aplicados. Diante de contrações musculares em membros pélvicos, cauda e/ou ânus, as quais foram consideradas respostas condizentes com o correto posicionamento da agulha no espaço epidural, estimulando raízes da cauda equina, procedeu-se à administração da associação de lidocaína, bupivacaína e tramadol. Constatou-se a adequada anestesia epidural mediante relaxamento do esfíncter anal, ausência dos reflexos patelares e flexor e a analgesia na área cirúrgica abdominal. Conclui-se que o método foi eficaz para a confirmação do correto posicionamento da agulha no espaço epidural durante a realização dessa anestesia regional em cães.The electric neurostimulator was used as an adequate mean for the confirmation of the correct placement of the tip of the insulated needles in the lumbosacral epidural space through small electric stimulations causing muscle contractions by using an intravenous catheter needle instead of an electric neurostimulation insulated needle. Forty dogs were selected based on the need for an epidural block for orthopedic, abdominal or retroumbilical surgical procedures. Electrical stimuli were applied from 1.5 to 0.5mA during a gradual introduction of the needle into the lumbosacral vertebral canal. Responses that were considered as indicative of the correct placement of the needle and stimulation of

  20. Punção aspirativa por agulha fina como método de coleta de material para a histopatologia no osteossarcoma canino

    OpenAIRE

    Luciele V. Teixeira; Lopes, Sonia T.A.; Danieli B. Martins; Raqueli T. França; Rafael A. Fighera

    2010-01-01

    Para a obtenção do diagnóstico definitivo do osteossarcoma realizam-se exames citopatológico e histopatológico. O material para exame citopatológico é coletado através de punção aspirativa por agulha fina (PAAF), já para a realização do exame histopatológico é necessário uma amostra de tamanho maior, geralmente conseguida através de biópsia incisional. Este trabalho tem como objetivo desenvolver uma técnica de coleta de material em cães com suspeita de osteossarcoma através de PAAF para a rea...

  1. Partial pressure (or fugacity) of carbon dioxide, salinity and other variables collected from underway - surface observations using Carbon dioxide (CO2) gas analyzer, Shower head chamber equilibrator for autonomous carbon dioxide (CO2) measurement and other instruments from the S. A. AGULHAS in the Indian Ocean and South Atlantic Ocean from 2009-01-26 to 2011-01-10 (NODC Accession 0081024)

    Data.gov (United States)

    National Oceanic and Atmospheric Administration, Department of Commerce — NODC Accession 0081024 includes chemical, meteorological, physical and underway - surface data collected from S. A. AGULHAS in the Indian Ocean and South Atlantic...

  2. Dissolved inorganic carbon, pH, alkalinity, temperature, salinity and other variables collected from discrete sample and profile observations using CTD, bottle and other instruments from the S. A. AGULHAS in the South Atlantic Ocean from 1997-12-04 to 1998-02-06 (NODC Accession 0113247)

    Data.gov (United States)

    National Oceanic and Atmospheric Administration, Department of Commerce — NODC Accession 0113247 includes chemical, discrete sample, physical and profile data collected from S. A. AGULHAS in the South Atlantic Ocean from 1997-12-04 to...

  3. Punção aspirativa por agulha fina guiada por ultra-sonografia de nódulos tireoidianos: estudo de 63 casos Ultrasound-guided fine needle aspiration biopsy of thyroid nodules: study of 63 cases

    OpenAIRE

    Daniel Andrade Tinoco de Souza; Heloisa Maria Pereira Freitas; Mônica Muzzi; Antonio Carlos Pires Carvalho; Edson Marchiori

    2004-01-01

    Neste trabalho foi revisada a técnica empregada na execução da punção aspirativa por agulha fina guiada por ultra-sonografia, e são descritos os seus benefícios no diagnóstico de nódulos tireoidianos. Foram realizadas punções aspirativas por agulha fina em 63 pacientes do Hospital Universitário Clementino Fraga Filho da Universidade Federal do Rio de Janeiro, encaminhados ao Serviço de Radiodiagnóstico, no período de agosto de 2001 a junho de 2002. Dos 63 pacientes estudados, 58 (92%) eram do...

  4. Simulación numérica del proceso de fractura en concreto reforzado mediante la metodología de discontinuidades fuertes de continuo. Parte II: Aplicación a páneles sometidos a cortante Numerical modelling of the fracture process in reinforced concrete by means of a continuum strong discontinuity approach. Part II: application to shear panels

    Directory of Open Access Journals (Sweden)

    Huespe Alfredo E.

    2010-12-01

    Full Text Available En este trabajo se presentan los resultados de la simulación numérica del proceso de fractura en páneles de concreto reforzado sometidos a cortante, utilizando un modelo basado en la metodología de discontinuidades fuertes de continuo(CSDA y la teoría de mezclas. La CSDA describe la localzación de la deformación y la formación de una discontinuidad asociada con la aparición de una fisura. En cambio, la teoría de mezclas representa el comportamiento de un material compuesto, constituido por una matriz de concreto simple y uno o dos paquetes de barras largas de acero de refuerzo. El comportamiento del concreto simple y el acero se representan mediante un modelo de daño bidimensional y un modelo de plasticidad unidimensional, respectivamente. El modelo se implementa en el método de los elementos finitos considerando estado plano de esfuerzos, deformaciones infinitesimales y cargas estáticas. Se simularon tres páneles reforzados en una o en dos direcciones, los cuales estaban y sometidos principalmente a fuerzas cortantes. Los resultados de la simulación numérica, como la respuesta estructural y el patrón de fisuración, fueron satisfactorios.The numerical simulation results of the fracture process in reinforced concrete shear panels are presented in this work. The simulation used a model based on the continuum strong discontinuity approach (CSDA and mixing theory. CSDA describes strain localization and formation of discontinuity associated with the appearance of a crack. On the other hand, mixing theory represents composite material behaviour which is formed by a simple concrete matrix and one or two bundles of long reinforcement bars. The behaviour of simple concrete and steel is represented by a two-dimensional damage model and one-dimensional plasticity model, respectively. The model has been implemented in the finite element method which considers plane stress, infinitesimal strain and static loads. Three panels are simulated

  5. Diagnóstico de criptococose canina pela citologia aspirativa por agulha fina Diagnosis of canine cryptococcosis by fine-needle aspiration cytology

    Directory of Open Access Journals (Sweden)

    Danieli Brolo Martins

    2008-06-01

    Full Text Available Relata-se um caso de criptococose canina de caráter sistêmico e neurológico diagnosticado com o auxílio da citologia aspirativa por agulha fina (CAAF. O paciente, da raça Labrador, 1 ano e 5 meses, macho, apresentava sinais de depressão/estupor, hiporexia, presença de uma massa cervical delimitada entre os dois linfonodos submandibulares e aumento de linfonodos. A punção aspirativa da massa cervical e dos linfonodos poplíteo, pré-escapular e submandibular revelaram presença de fungos compatíveis com Cryptococcus neoformans, o qual foi então confirmado pela cultura fúngica, e classificado como sorotipo D. A CAAF mostrou ser um método rápido, seguro e eficaz em casos de criptococose canina com presença de linfoadenomegalia.This paper aimed to described a 1.5 year-old Labrador male, diagnosed with cryptococcosis using fine-needle aspiration cytology (FNAC. The dog was showing signs of depression and hyporexia. Peripheral lymph nodes and a mass situated between the submandibular lymph nodes were aspirated. The cytology showed yeast-like structures resembling Cryptococcus sp. in all samples examined. These findings were confirmed by culture (C. neoformans, serotype D. The FNAC technique allowed a quick, safe and easy diagnosis in this case.

  6. Frontolysis by surface heat flux in the Agulhas Return Current region with a focus on mixed layer processes: observation and a high-resolution CGCM

    Science.gov (United States)

    Ohishi, Shun; Tozuka, Tomoki; Komori, Nobumasa

    2016-02-01

    Detailed mechanisms for frontogenesis/frontolysis of the Agulhas Return Current (ARC) Front, defined as the maximum of the meridional sea surface temperature (SST) gradient at each longitude within the ARC region (40°-50°E, 55°-35°S), are investigated using observational datasets. Due to larger (smaller) latent heat release to the atmosphere on the northern (southern) side of the front, the meridional gradient of surface net heat flux (NHF) is found throughout the year. In austral summer, surface warming is weaker (stronger) on the northern (southern) side, and thus the NHF tends to relax the SST front. The weaker (stronger) surface warming, at the same time, leads to the deeper (shallower) mixed layer on the northern (southern) side. This enhances the frontolysis, because deeper (shallower) mixed layer is less (more) sensitive to surface warming. In austral winter, stronger (weaker) surface cooling on the northern (southern) side contributes to the frontolysis. However, deeper (shallower) mixed layer is induced by stronger (weaker) surface cooling on the northern (southern) side and suppresses the frontolysis, because the deeper (shallower) mixed layer is less (more) sensitive to surface cooling. Therefore, the frontolysis by the NHF becomes stronger (weaker) through the mixed layer processes in austral summer (winter). The cause of the meridional gradient of mixed layer depth is estimated using diagnostic entrainment velocity and the Monin-Obukhov depth. Furthermore, the above mechanisms obtained from the observation are confirmed using outputs from a high-resolution coupled general circulation model. Causes of model biases are also discussed.

  7. Aplicação do modelo de crenças em saúde na prevenção dos acidentes com agulha Application of the health belief model to the prevention of occupational needlestick injuries

    Directory of Open Access Journals (Sweden)

    Maria Meimei Brevidelli

    2001-04-01

    Full Text Available OBJETIVO: Para prevenir a aquisição de infecções sangüíneas (Aids, hepatites B e C por profissionais de saúde, recomenda-se não reencapar agulhas. Entretanto, esses profissionais não adotam essa recomendação com freqüência. O objetivo do estudo foi aplicar o modelo de crenças em saúde (MCS para explicar este problema, relacionando o comportamento individual às crenças de suscetibilidade, severidade, benefícios e barreiras, e aos estímulos recebidos para adotar a recomendação. MÉTODOS: Por meio de questionário respondido por profissionais de enfermagem de um hospital, foram identificados: a freqüência com que reencaparam agulhas (mês anterior e as crenças do MCS. Para mensurar as crenças, foram construídas escalas tipo Likert, submetidas à validação de conteúdo (juízes e de constructo (análise fatorial exploratória e à análise da confiabilidade (coeficientes alfa de Cronbach e de correlação de duas metades. A relação entre crenças e adesão à recomendação de não reencapar agulhas foi obtida pela análise de regressão. RESULTADOS: Da amostra de profissionais de enfermagem obtida por adesão (n=319, cerca de 75% relataram reencapar agulhas pelo menos alguma vez. Os profissionais de enfermagem que aderiram mais freqüentemente à recomendação de não reencapar agulhas tinham menos de dois anos de experiência profissional, percebiam menor número de barreiras e maior número de benefícios para adotar a recomendação. Esses resultados possibilitaram discutir a reformulação do treinamento oferecido pela instituição hospitalar.OBJECTIVE: To prevent health care professionals from acquiring blood-borne diseases (AIDS, hepatitis B and C, it is recommended that needles should not be recapped. However, these professionals frequently do not comply with this recommendation. The main purpose of this study was to assess this problem by using the Health Belief Model (HBM to correlate the compliance with the

  8. Punção aspirativa por agulha fina como método de coleta de material para a histopatologia no osteossarcoma canino

    Directory of Open Access Journals (Sweden)

    Luciele V. Teixeira

    2010-02-01

    Full Text Available Para a obtenção do diagnóstico definitivo do osteossarcoma realizam-se exames citopatológico e histopatológico. O material para exame citopatológico é coletado através de punção aspirativa por agulha fina (PAAF, já para a realização do exame histopatológico é necessário uma amostra de tamanho maior, geralmente conseguida através de biópsia incisional. Este trabalho tem como objetivo desenvolver uma técnica de coleta de material em cães com suspeita de osteossarcoma através de PAAF para a realização de exame histopatológico. Foram coletadas duas amostras de 12 cães suspeitos de osteossarcoma por PAAF. O material obtido pela primeira coleta foi utilizado para confirmar o diagnóstico através do exame citopatológico, enquanto que o material oriundo da segunda coleta foi fixado em formol a 10% para a análise histopatológica. Quatro das 12 amostras (33,3% avaliadas histopatologicamente pela metodologia proposta obtiveram também o diagnóstico de osteossarcoma. Esses resultados apontam para uma possível adequação da técnica de coleta de material por PAAF para exame histopatológico.Cytopathologic and histopathologic tests are important to obtain a definitive diagnosis of osteosarcoma. The sample for cytopathological exam is collected through fine-needle aspiration cytology (FNA. On the other hand, histopathological exams need a larger sample that is usually obtained by incisional biopsy. The objective of this article is to develop a FNA technique to biopsy and evaluate histopatologically samples of dogs with suspected osteosarcoma. Two FNS samples were collected from 12 such dogs. Samples obtained in the first procedure were examined cytologically. The material sampled at the second biopsy was fixed in 10% formalin and submitted to histopathological analysis. Four out of the 12 samples (33.3% examined by the herein proposed method were diagnosed as osteosarcoma. These results indicate a possible adaptation of FNA for

  9. Punção aspirativa por agulha fina em lesão nodular de tireóide Fine-needle aspiration in thyroid nodular disease

    Directory of Open Access Journals (Sweden)

    Carlos Felipe Saraiva Bezerra

    2003-06-01

    Full Text Available OBJETIVO: O presente trabalho se propõe a analisar a precisão da punção aspirativa por agulha fina (PAAF em pacientes avaliados no Departamento de Cirurgia do Hospital Universitário Walter Cantídio (HUWC, portadores de lesões nodulares da tireóide. MÉTODO: A avaliação contemplou 130 pacientes que apresentavam nódulos de tireóide clinicamente palpáveis, com indicação de tratamento cirúrgico, segundo critérios clínicos e citopatológicos. Utilizaram-se seringas descartáveis de 10ml, agulhas descartáveis 25x06, lâminas esmerilhadas para microscopia, frascos para lâmina e álcool a 95%. RESULTADOS: A análise citopatológica mostrou nódulos benignos - 58 (44,6%; indeterminados (lesões foliculares e suspeitos - 38 (29,2%; malignos - 21 (16,2% e insatisfatório - 13 (10,0%. Através do exame histopatológico, foram identificadas 45 neoplasias malignas e 85 lesões benignas. Foram observados os seguintes índices na análise da associação entre os dados obtidos com citopatologia e histopatologia: sensibilidade de 74%; especificidade de 98%; valor preditivo positivo de 95,2%; falso-positivo de 1,9%; valor preditivo negativo de 87,9%; falso-negativo de 25,9% e acurácia de 89,8%. Quando foram incluídos os resultados indeterminados (suspeito e lesão folicular como positivo para neoplasia maligna, na mesma seqüência anterior, os resultados foram: 82,5%; 66,2%; 55,9%; 33,7%; 87,9%; 17,5% e 71,8%. A avaliação dos grupos supracitados mostrou significância estatística (p = 0,00, aplicando-se o teste exato de Fisher. CONCLUSÕES: Os resultados apresentados confirmam a precisão da PAAF na abordagem dos pacientes com lesões nodulares da tireóide, no HUWC-UFC.BACKGROUND: The objective of this study is to analyze the accuracy of fine-needle aspiration technique (FNA in patients who presented thyroid nodular disease referred to the Surgical Department of the Ceará Federal University School of Medicine. METHODS: One hundred and

  10. Fratura de agulha durante punção subaracnóidea: relato de caso Fractura de aguja durante punción subaracnóidea: relato de caso Needle fracture during spinal puncture: case report

    Directory of Open Access Journals (Sweden)

    Marcos G C Cruvinel

    2004-12-01

    Full Text Available JUSTIFICATIVA E OBJETIVOS: Depois da introdução das agulhas de fino calibre (26G, 27G e 29G e a conseqüente diminuição da incidência de cefaléia pós-punção da dura-máter, a raquianestesia vem sendo cada dia mais empregada. Suas complicações são pouco freqüentes. Recentemente, entretanto, foi observada uma complicação aparentemente rara, de fratura da agulha durante punção subaracnóidea. O objetivo deste relato é registrar o fato e aventar as possíveis causas e sua prevenção. RELATO DO CASO: Paciente do sexo masculino, 53 anos, 90 kg, 175 cm, portador de hipertensão arterial sistêmica crônica e insuficiência renal crônica apresentou-se, em caráter de urgência, para transplante renal. Foi proposta a administração de morfina subaracnóidea visando analgesia pós-operatória. Inicialmente tentou-se, sem sucesso, punção em L3-L4 com agulha 27G, seguiu-se tentativa de punção em L2-L3 quando se percebeu deformação da agulha. Ao ser retirada a agulha partiu-se, permanecendo um fragmento de 43 mm no ligamento interespinhoso de L2-L3, confirmado por fluoroscopia. Foi induzida anestesia geral e procedeu-se exploração cirúrgica guiada por fluoroscopia com retirada do fragmento da agulha. A seguir, o transplante renal foi realizado sem intercorrências. CONCLUSÕES: A diminuição do calibre das agulhas, que trouxe a vantagem da redução da incidência de cefaléia pós-punção da dura-máter, fez também com que elas se tornassem mais frágeis. Em casos onde os ligamentos são mais resistentes e a punção tentada mais de uma vez, pode haver deformação do material que fica susceptível a quebra. Conclui-se que em situações em que há resistência aumentada à passagem da agulha ou dificuldade de punção, o risco de sua deformação e a possibilidade de fratura devem ser confrontados com as vantagens do uso de agulhas de fino calibre.JUSTIFICATIVA Y OBJETIVOS: Después de la introducción de las agujas de

  11. Frequency of fear of needles and impact of a multidisciplinary educational approach towards pregnant women with diabetes Frequência de medo de agulhas e impacto de uma abordagem educacional multidisciplinar em gestantes com diabetes

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    Alina Coutinho Rodrigues Feitosa

    2013-03-01

    Full Text Available PURPOSE: To evaluate the frequency of fear of needles and the impact of a multidisciplinary educational program in women with pre-gestational and gestational diabetes taking insulin during pregnancy. METHODS: The short Diabetes Fear of Injecting and Self-testing Questionnaire (D-FISQ, composed by two subscales that access fear of self injection (FSI and fear of self testing (FST, was administered twice during pregnancy to 65 pregnant women with pre-gestational and gestational diabetes: at the first endocrine consult and within the last two weeks of pregnancy or postpartum. An organized multidisciplinary program provided diabetes education during pregnancy. Statistical analysis was carried out by Wilcoxon and McNemar tests and Spearman correlation. A pOBJETIVO: Avaliar a frequência do medo de agulhas e o impacto de um programa educacional multidisciplinar em mulheres com diabetes pré-gestacional e gestacional em uso de insulinas durante a gravidez. MÉTODOS: O questionário Diabetes Fear of Injecting and Self-testing Questionnaire (D-FISQ resumido, composto por duas subescalas que acessam o medo de injeções (FSI e o medo da automonitoração (FST, foi administrado duas vezes durante a gestação de 65 mulheres com diabetes pré-gestacional e gestacional: na primeira consulta endocrinológica e dentro das últimas duas semanas de gestação ou pós-parto. Durante a gravidez, as gestantes foram submetidas a um programa multidisciplinar sistematizado para prover educação em diabetes. A análise estatística foi realizada por meio dos testes de Wilcoxon e McNemar e a correlação de Spearman. Valor p<0,05 foi considerado como significativo. RESULTADOS: A aplicação do questionário D-FISQ resumido indicou que 43,1% das gestantes apresentavam medo de agulhas na primeira avaliação. Houve significativa redução nos escores das subescalas FSI e FST entre a primeira e segunda avaliação (primeiro FSI 38,5% comparado com o segundo 12,7%, p=0

  12. Emergency right hepatectomy after laparoscopic tru-cut liver biopsy

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    Nicolás Quezada

    2015-01-01

    Conclusion: Care must be taken when performing this kind of procedures and a high level of suspicion regarding this complication should be taken in count when clinical/hemodynamic deterioration occurs after these procedures.

  13. Evaluation of the apical seal after intraradicular retainer removal with ultrasound or carbide bur Avaliação do selamento apical após remoção de retentor intra-radicular com ultra-som ou instrumento cortante rotatório

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    Tomie Nakakuki Campos

    2007-09-01

    Full Text Available There are situations in which intraradicular retainers have to be removed and replaced. The objective of this research was to evaluate the apical seal after the removal of a custom cast post and core with a carbide bur or with an ultrasound apparatus. Twenty five roots of extracted human incisors were used. They were endodontically treated and prepared to receive the posts. The posts and cores were cast with 2 types of dental alloys, CuAlZn and PdAg, and were cemented with zinc phosphate cement. After 24 hours, they were removed using the two above mentioned techniques. Then, the roots had their external surface made impermeable by two layers of cyanoacrylate adhesive, leaving only the cervical area for dye penetration. The teeth were immersed in rhodamine for 24 hours. They were then cut and observed under an optical microscope and analyzed with appropriate software (Imagelab. The results were submitted to ANOVA, and they evidenced that, regarding the alloy factor, PdAg posts presented a larger mean infiltration value (2.23 ± 0.48 mm as compared to the posts made of CuAlZn (1.39 ± 0.48 mm (p = 0.025. Regarding the technique factor, there was no significant difference (p = 0.9 between the removal of the intraradicular retainer using ultrasound (1.99 ± 0.62 mm or using a rotating cutting instrument (1.62 ± 0.62 mm. Under these experimental conditions, it was possible to conclude that the degree of apical leakage was directly related to the alloy type, and it was present in both techniques used.Há situações que exigem a remoção ou substituição de retentores intra-radiculares. O objetivo deste trabalho foi avaliar o selamento apical do material obturador após a remoção de pino intra-radicular metálico fundido com instrumento cortante rotatório ou com aparelho de ultra-som. Utilizaram-se 25 raízes de incisivos humanos extraídos, que foram endodonticamente tratadas e preparadas para receberem os pinos. Os retentores intra

  14. Decomposição de agulhas de Pinus pinaster e de folhas de Eucalyptus globulus em regiões do interior e do litoral de Portugal Decomposition of needle litter of Pinus pinaster and leaf litter of Eucalyptus globulus in the littoral and inland areas of Portugal

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    C. Ribeiro

    2007-07-01

    Full Text Available Estudou-se, pela metodologia dos litter-bags, a decomposição de agulhas de Pinus pinaster (PP e de folhas de Eucalyptus globulus (EG, considerando a taxa de decomposição e a dinâmica de libertação dos nutrientes mais relevantes para a sustentabilidade dos sistemas florestais. Os estudos decorreram no litoral da Região Centro (Furadouro, Óbidos, quer com folhas de EG quer com agulhas de PP, no interior da Região Norte (Vila Pouca de Aguiar, com agulhas de PP, e numa situação intermédia com folhas de EG (Pegões e Rio Maior. Para igual período, a taxa de decomposição das agulhas de PP, estimada pelo modelo exponencial simples, foi inferior à determinada para as folhas de EG, sendo a diferença mais acentuada na fase inicial da decomposição (6 meses, em que a perda de peso das agulhas de PP foi cerca de metade da observada para as folhas de EG. Durante a fase inicial decomposição, tanto das folhas de EG como das agulhas de PP, ocorreu uma assinalável libertação de P, K e de Mg. A libertação do N dependeu da taxa de decomposição, observando- -se imobilização para as agulhas de PP com mais baixa taxa de decomposição, e libertação rápida para as folhas de EG com mais elevada taxa de decomposição. No caso do Ca o factor diferenciador foi a espécie, sendo a respectiva libertação baixa para as agulhas de PP, mas acentuada para as folhas de EG. As folhas verdes de resíduos de abate de EG decompuseram-se e libertaram os nutrientes mais rapidamente do que as folhas senescentes da mesma espécie.Decomposition of needle litter of Pinus pinaster (PP and leaf litter of Eucalyptus globulus (EG was assessed using the litterbag methodology. Decomposition rate of these residues and release dynamics of nutrients with more relevance to the sustainability of forest systems were measured. The study was carried out in the litoral of Central Portugal (Furadouro,Óbidos, using both PP and EG, in inland of North Portugal (Vila Pouca

  15. Acurácia da punção aspirativa por agulha fina e da punção por agulha grossa no diagnóstico de lesões mamárias Diagnostic accuracy of the fine needle aspiration cytologyand core needle biopsy as a diagnostic method for breast lesions

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    Patrícia Pontes Frankel

    2011-03-01

    Full Text Available OBJETIVO: avaliar a acurácia da punção aspirativa por agulha fina (PAAF e da punção por agulha grossa (PAG no diagnóstico da lesão mamária e do câncer de mama. MÉTODOS: trata-se de um estudo transversal, retrospectivo e descritivo, baseado na busca em prontuários médicos. A PAAF e a PAG foram realizadas sequencialmente, como rotina do serviço de Mastologia. Os dois procedimentos percutâneos foram realizados em 233 pacientes, no período de março de 2005 a fevereiro de 2007. Foram incluídas mulheres com idade igual ou superior a 18 anos, com alterações no exame clínico e/ou de imagem das mamas ou com histórico familiar de câncer de mama e/ou ovário. A PAAF e a PAG foram realizadas de acordo com as recomendações técnicas do Instituto Nacional de Câncer. Foram calculados o percentual de concordância, o coeficiente Kappa de Cohen, a sensibilidade, a especificidade, os valores preditivos positivo e negativo e a acurácia da PAAF e da PAG, considerando como padrão-ouro a biópsia cirúrgica. RESULTADOS: a média de idade das pacientes foi de 49 anos (±12,7, os tumores mediam em média 26,9 mm (±23,1, e em 47,2% dos casos, tinham mais de 20 mm. A sensibilidade, a especificidade, os valores preditivos positivo e negativo e a acurácia foram maiores na PAG do que na PAAF, independentemente do tamanho da lesão mamária, tendo a PAG uma acurácia diagnóstica de 97,5% e a PAAF de 77,5%. CONCLUSÃO: apesar de a PAG mostrar maiores valores de sensibilidade, especificidade, valor preditivo positivo, valor preditivo negativo e acurácia que a PAAF, tanto para as lesões palpáveis quanto para as impalpáveis, o método permanece útil no diagnóstico minimamente invasivo das lesões mamárias, sobretudo quando seus resultados são analisados em conjunto com o exame clínico e de imagem.PURPOSE: to determine the accuracy of fine-needle aspiration biopsy (FNAB and of core-needle biopsy (CNB in diagnosing breast lumps and breast

  16. Punção aspirativa por agulha fina guiada por ultra-sonografia de nódulos tireoidianos: estudo de 63 casos Ultrasound-guided fine needle aspiration biopsy of thyroid nodules: study of 63 cases

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    Daniel Andrade Tinoco de Souza

    2004-10-01

    Full Text Available Neste trabalho foi revisada a técnica empregada na execução da punção aspirativa por agulha fina guiada por ultra-sonografia, e são descritos os seus benefícios no diagnóstico de nódulos tireoidianos. Foram realizadas punções aspirativas por agulha fina em 63 pacientes do Hospital Universitário Clementino Fraga Filho da Universidade Federal do Rio de Janeiro, encaminhados ao Serviço de Radiodiagnóstico, no período de agosto de 2001 a junho de 2002. Dos 63 pacientes estudados, 58 (92% eram do sexo feminino e cinco (8% eram do sexo masculino, com uma relação mulher/homem de cerca de 11:1. Trinta e um pacientes (49% se situaram na quinta e sexta décadas de vida. Oitenta e nove por cento dos pacientes apresentaram-se com nódulos múltiplos ao exame ecográfico; apenas 11% dos pacientes tinham nódulo único. Em relação aos laudos citológicos dos nódulos puncionados, 47% foram benignos, 31%, suspeitos, 17%, inadequados e apenas 5%, malignos. Todos os nódulos malignos (três pacientes tiveram o diagnóstico citológico de carcinoma papilífero. Dos nódulos benignos, 93% foram diagnosticados como hiperplasia nodular e apenas 7% tiveram diagnóstico de tireoidite. Dos laudos considerados inadequados, 70% foram considerados hemorrágicos, sendo 30% considerados hipocelulares. Os dados encontrados no nosso trabalho estiveram de acordo com os encontrados na literatura médica.In this study we reviewed the technique for ultrasound-guided fine needle aspiration biopsy and its benefits in the diagnosis of thyroid nodules. Ultrasound-guided fine needle aspiration was performed in 63 patients referred to the Department of Radiology of "Hospital Universitário Clementino Fraga Filho, Universidade Federal do Rio de Janeiro", Rio de Janeiro, Brazil, between August 2001 and June 2002. Fifty-eight (92% of the patients were female and five patients (8% were male; 11:1 female/male ratio. Thirty-one patients (49% had 50-60 years of age and 89

  17. Punção aspirativa transbrônquica por agulha no diagnóstico e estadiamento do câncer de pulmão Transbronchial needle aspiration in the diagnosis and staging of lung cancer

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    Mauro Zamboni

    2004-04-01

    Full Text Available INTRODUÇÃO: Nos últimos anos, a punção aspirativa transbrônquica por agulha vem sendo utilizada cada vez com maior freqüência no diagnóstico e estadiamento do câncer de pulmão, principalmente nos EUA. Entretanto, muito pouco se tem publicado a respeito do método em nosso país. OBJETIVO: Avaliar a efetividade da punção aspirativa transbrônquica por agulha no diagnóstico e estadiamento do câncer de pulmão. MÉTODO: Setenta e quatro punções aspirativas transbrônquicas por agulha, realizadas no Hospital do Câncer-INCA/MS, foram revistas retrospectivamente. Todos os pacientes realizaram tomografia computadorizada do tórax previamente ao procedimento. RESULTADOS: Onze (15% pacientes tinham massas mediastinais e 63 (85% massas hilares. Foram encontradas 76 alterações endoscópicas: alargamento da carina principal em 44 (59% pacientes, alargamento de carina secundária em 12 (16%, compressão paratraqueal em 5 (7%, compressão da parede posterior da traquéia em 3 (4%, e compressão de brônquio principal em 5 (7% pacientes. O material foi satisfatório para o diagnóstico em 42 (57% pacientes e em 34 (46% o diagnóstico foi confirmado. O diagnóstico de doença maligna foi confirmado em 30/34 (88% pacientes: carcinoma indiferenciado de pequenas células em 10/30 (33%, carcinoma escamoso em 7/30 (23%, adenocarcinoma em 7/30 (23%, e carcinoma não pequenas células em 6/30 (20% pacientes. Em 4/30 (12% pacientes foram diagnosticadas patologias benignas: tuberculose em 2/4 (50% e sarcoidose em 2/4 (50% pacientes. Não observamos nenhuma complicação com o método. CONCLUSÃO: Nossa experiência em 74 pacientes mostrou que o procedimento é seguro, rápido em sua realização, com mínimas complicações e de utilidade no diagnóstico e estadiamento de pacientes com neoplasia pulmonar.BACKGROUND: Transbronchial needle aspiration (TBNA with a flexible bronchoscope has been used to diagnose bronchogenic carcinoma for many years in

  18. Diagnóstico de fibromatosis colli por punção aspirativa por agulha fina: relato de três casos Diagnosis of fibromatosis colli by fine-needle aspiration cytology: report of three cases

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    Gisele Alborghetti Nai

    2005-06-01

    Full Text Available Fibromatosis colli é uma patologia benigna, rara, que se apresenta como uma massa cervical, aparecendo durante as primeiras semanas de vida e freqüentemente associada a torcicolo congênito. É uma lesão fibroblástica que acomete o músculo esternocleidomastóideo, com medidas variando entre 1 e 3cm. Relatamos os casos de três lactentes, dois do sexo masculino e um do feminino, de 30 dias de vida, que apresentavam massa cervical à direita, na projeção do músculo esternocleidomastóideo, medindo, cada, 1,5cm no maior eixo. Foram realizadas punções aspirativas por agulha fina (PAAF, cujos esfregaços mostraram moderado número de fibroblastos isolados e também células multinucleadas, compatíveis com células musculares degeneradas. Nenhum dos casos apresentou processo inflamatório. Os achados citológicos associados ao quadro clínico permitem diagnóstico definitivo e acurado desta patologia, evitando-se uma biópsia cirúrgica, além de proporcionar um início precoce do tratamento conservador que levará à resolução da doença na maioria dos casos.Fibromatosis colli is a benign and rare disorder presented as a neck mass, appearing during the first weeks of life and it is often associated with congenital torticollis. It is a fibroblastic lesion that affects the sternocleidomastoid muscle, and varies in size from 1 to 3cm. We report three cases of neonates, two males and one female, 30 days-old, presenting a right cervical mass, in the sternocleidomastoid, measuaring 1,5cm each one. The major cytologic finding was loose benign fibroblasts and multinucleated cells consistent with degerating skeletal muscle fibers. None of the cases presented inflammatory cells. The cytological findings together with the clinical picture allow a definitive and accurate diagnosis of this entity, avoiding surgical biopsy, providing early initiation of conservative treatment, which will lead to resolution of the disease in the majority of the cases.

  19. Punção Aspirativa por Agulha Fina Orientada por Ultra-Sonografia em Lesões Não-palpáveis Fine Needle Aspiration Cytology Guided by Ultrasound in Nonpalpable Lesions

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    Cláudio Kemp

    2001-06-01

    Full Text Available Objetivo: correlacionar os achados citológicos obtidos por punção com agulha fina dirigida pela ultra-sonografia de lesões não-palpáveis da mama, císticas ou sólidas, os aspectos ultra-sonográficos e os respectivos resultados histopatológicos das lesões que foram submetidas a cirurgia. Métodos: foram analisadas 617 lesões não-palpáveis visualizadas ao ultra-som. Realizou-se a punção aspirativa por agulha fina (PAAF orientada pela ultra-sonografia, com análise citológica do material, diferenciando-as em cistos ou nódulos sólidos. Estes tiveram seu resultado citológico confrontado com o resultado histopatológico, nos casos em que foi realizada a biópsia cirúrgica. Resultados: das 617 lesões não-palpáveis, 471 eram cistos, sendo 451 cistos simples que apresentaram citologia negativa em todos os casos e 20 casos foram considerados cistos complexos. Destes, 3 (15% tiveram resultado citológico positivo ou suspeito e em 2 casos confirmou-se malignidade. Dos 105 nódulos sólidos, 63 apresentaram citologia negativa, sendo 59 concordantes com a biópsia e houve 4 casos (0,3% de resultado falso-negativo pela citologia. Todos, porém, apresentavam discordância entre imagem e citologia. Em 14 nódulos sólidos (13%, a citologia foi suspeita e, destes, 5 foram diagnosticados como carcinoma. Em outros 14 (13%, o material foi insatisfatório e 1 era carcinoma. Em 51 casos, o tríplice diagnóstico foi concordante e optou-se por seguimento clínico. Conclusão: a análise citológica do material dos cistos mamários simples é desnecessária, porém quando são complexos, a citologia é imperativa. Nas lesões sólidas não-palpáveis, é fundamental a correlação da citologia com o aspecto ultra-sonográfico e mamográfico; caso sejam discordantes, deve-se sempre prosseguir a investigação da lesão.Purpose: to determine the relationship between fine needle aspiration cytology guided by ultrasound of nonpalpable breast lesions

  20. AGULHA FINA DE MAMA E TIREOIDE

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    Ivone Rosini

    2014-01-01

    Full Text Available El estudio objetivó construir un protocolo de cuidados para punción aspirativa con aguja fina de mama y tiroides. Con abordaje cualitativo, tipo convergente asistencial. el estudio fue realizado en un hospital de enseñanza en el sur de Brasil, en el periodo septiembre de 2010 a abril de 2011. Participaron del estudio 88 clientes y 20 profesionales que actúan en el Servicio de Radiología. La construcción del protocolo ocurrió en tres etapas: realización de actividades educativas em sala de espera junto a los clientes para identificación de dudas y ansiedades acerca del examen, encuentros con los profesionales para evaluación y validación del protocolo y búsqueda de evidencias científicas en las fuentes de datos. La organización de lós datos ha permitido la elaboración del organigrama de atendimiento del cliente y el protocolo de cuidados, que fue organizado en actividades secuenciales incluyendo el ejecutor, actividad y justificativa científica. Los profesionales indicaron la importancia del protocolo, trayendo beneficios para la asistencia del cliente, como la agilidad, organización y humanización del atendimiento.

  1. A utilidade da citologia por punção com agulha fina aliada a imunofenotipagem no diagnóstico dos linfomas não-Hodgkin Diagnosis of non-Hodgkin's lymphoma combining immunophenotyping and fine needle aspiration

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    Flávia P. S. Costa

    2005-03-01

    Full Text Available A classificação para linfomas não-Hodgkin (LNH proposta pela Organização Mundial da Saúde (OMS enfatiza a importância do imunofenótipo para o diagnóstico. O objetivo deste estudo foi avaliar a utilidade da citologia combinada a citometria de fluxo para o diagnóstico de LNH, utilizando um painel de anticorpos monoclonais e estudo do ciclo celular. O material foi obtido através de aspiração de linfonodos por agulha fina de 78 pacientes. O painel de anticorpos monoclonais para análise em citometria de fluxo foi o seguinte: CD19/CD10, CD20/CD5, CD23, CD38/CD7, CD3/CD4, CD3/CD8, kappa/lambda. O diagnóstico final foi confirmado pela histologia convencional, considerada gold standard. Em 85% dos casos a citologia associada a imunofenotipagem e porcentagem de células em fase S permitiram um diagnóstico correto. Nos demais casos foi possível diferenciar linfomas B ou T e estimar grau de agressividade. O painel, embora pequeno, foi suficiente exceto para os anaplásicos e subclassificação dos linfomas T. Nestes casos, a morfologia foi mais importante que imunofenótipo, sendo este seguro apenas para linfomas linfoblásticos. A fração de fase S mostrou-se importante para diferenciar linfomas indolentes e de alto grau. Concluímos que esta técnica é uma boa alternativa para o diagnóstico de linfomas não-Hodgkin. Permite um diagnóstico rápido, menos invasivo, podendo ser repetida quando necessário, agilizando o tratamento.The WHO classification of non-Hodgkin's lymphoma stresses the importance of the immunophenotype for diagnosis. The aim of our study was to evaluate the use of cytology together with flow cytometric examination using a panel of monoclonal antibodies including DNA S phase analysis. Material was obtained from lymph node aspiration of 78 patients. The panel for flow cytometric analysis comprised: CD19/CD10, CD20/CD5, CD23, CD3/CD4, CD3/CD8, CD38/CD7, kappa/lambda. The final diagnosis was confirmed by lymph node

  2. Carcinoma mucinoso invasor da mama e seus diagnósticos diferenciais em biópsia por agulha grossa: revisão da literatura Mucinous invasive carcinoma of the breast and its differential diagnosis by core biopsy: review of the literature

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    Juliana Silva Zanetti; Alfredo Ribeiro-Silva

    2010-01-01

    A biópsia por agulha grossa (BAG), ou core biopsy, é uma técnica utilizada para retirar pequenos cilindros de tecido mamário. Além de lesões palpáveis, o desenvolvimento de técnicas radiológicas acuradas de localização de lesões mamárias difundiu o uso da BAG como primeira abordagem histológica de lesões não palpáveis. O diagnóstico diferencial do carcinoma mucinoso com lesões mucinosas benignas por BAG pode ser desafiador, principalmente se a lesão apresentar extravasamento de mucina. A acur...

  3. Experiência em pacientes com suspeita de hepatopatia crônica e contra-indicação para biópsia hepática percutânea utilizando a agulha de Ross modificada Transjugular liver biopsy: experience in patients with suspected chronic liver disease and contraindication for percutaneous liver biopsy using modified Ross needle

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    Maciel, A. C.; S. G. Silva de Barros; D. P. Tarasconi; L. C. V. Severo Júnior; C.T.S. Cerski; D. de O. Ilha

    2000-01-01

    OBJETIVOS: O trabalho visou introduzir em nosso meio a técnica de biópsia hepática transjugular orientada por métodos radiológicos para a obtenção do diagnóstico histológico em pacientes clínica e laboratorialmente diagnosticados com hepatopatia crônica e com pelo menos uma das contra-indicações à biópsia hepática percutânea: coagulopatia, ascite maciça e anemia crônica acentuada com insuficiência renal crônica ou obesidade mórbida. MÉTODOS: Biópsia hepática aspirativa foi obtida com agulha d...

  4. O diagnóstico do carcinoma metastático de coróide pela biópsia aspirativa com agulha fina (BAAF: relato de caso The diagnosis of metastatic carcinoma of the choroid using fine-needle aspiration biopsy (FNAB: case report

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    Zélia Maria da Silva Corrêa

    2003-01-01

    Full Text Available OBJETIVO: Relatar o caso de um paciente com carcinoma de pulmão cuja primeira metástase detectada foi em coróide e a abordagem diagnóstica deste caso. MÉTODOS: Um homem de 35 anos, em tratamento devido a uma condensação pulmonar isolada, referiu baixa da acuidade visual súbita, dor, secreção e olho vermelho (olho direito há 10 dias. Ao exame oftalmológico foi detectada a presença de descolamento não regmatogênico de retina e múltiplos focos tumorais em coróide confirmado pela ultra-sonografia ocular diagnóstica. Foi sugerida biópsia aspirativa com agulha fina (BAAF para diagnosticar possível doença metastática. A biópsia aspirativa com agulha fina foi realizada sob anestesia peribulbar e sedação. A rota escolhida foi transvítrea através de esclerotomia a 4 mm do limbo. O procedimento foi monitorado via oftalmoscopia binocular indireta. Foram obtidas 2 amostras de focos tumorais diferentes. Após a biópsia aspirativa com agulha fina, as amostras foram encaminhadas para processamento, fixação e coloração pelos métodos Papanicolaou e hematoxilina-eosina. RESULTADOS: A citologia confirmou a suspeita de múltiplos focos metastáticos coroídeos. Os aspirados ocular e pulmonar revelaram ser de mesma origem devido à reação positiva com pan-citoqueratina (AE1/AE3. O paciente evoluiu para óbito 4 meses após diagnóstico citológico de carcinoma metastático ocular. CONCLUSÕES: A biópsia aspirativa com agulha fina foi eficiente em diagnosticar e correlacionar a citologia ocular com o tumor primário por métodos citoquímicos neste caso. A biópsia aspirativa com agulha fina ainda deve ser usada em casos selecionados e pesquisas futuras serão necessárias para que este procedimento diagnóstico seja considerado padrão em oftalmologia.PURPOSE: To report a case of a patient with lung carcinoma in which the first detected metastasis was to the choroid, how it was diagnosed and confirmed. METHODS: A 35 year-old white

  5. Valor das provas de posicionamento da ponta da agulha de veress em punção do hipocôndrio esquerdo na instalação do pneumoperitônio The value of tests results for veress needle tip placement intraperitoneally in the left hypochondrium for creating a pneumoperitoneum

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    Otávio Cansanção de Azevedo

    2006-10-01

    Full Text Available OBJETIVO: Avaliar provas de posicionamento da agulha de Veress no hipocôndrio esquerdo na criação do pneumoperitônio. MÉTODO: Em cem pacientes puncionados no hipocôndrio esquerdo, provas de posicionamento da agulha foram avaliadas, considerando-as positivas quando, na prova da aspiração (PA, material orgânico era aspirado; na prova da resistência (PRes, exercia-se pequena força no êmbolo da seringa à infusão de líquido; na prova da recuperação (PRec, não se recobrava o líquido infundido; na do gotejamento (PG, as gotas escoavam rapidamente e, na prova da pressão intraperitoneal inicial (PPII, os níveis eram = 8mmHg. PA positiva denunciava iatrogenia, enquanto que PRes, PRec, PG e PPII positivas indicavam que a ponta da agulha estava adequadamente posicionada na cavidade peritoneal. Foram calculadas a sensibilidade (S e a especificidade (E das provas, e os seus valores preditivos positivos (VPP e negativos (VPN, mediante correlação dos resultados verdadeiro-positivos (a, falso-positivos (b, falso negativos (c e verdadeiro-negativos (d, segundo as fórmulas: S=[a/(a+c]x100; E=[d/(b+d]x100; VPP=[a/(a+b]x100; VPN=[d(c+d]x100. RESULTADOS: Na PA, constatou-se que S e VPP não puderam ser aplicados, e E=100% e VPN=100%. Na PRes, S=0%, E=100%, VPP=não existiu e VPN=90%. Tanto na PRec quanto na PG, S=50%, E=100%, VPP=100% e VPN=94,7%. Na PPII, obteve-se que S, E, VPP e VPN=100%. CONCLUSÕES: Na punção no hipocôndrio esquerdo, PA negativa garante ausência de lesões; a PRes é insegura quanto ao mau posicionamento da agulha, mas indica corretamente o bom; a PRec e a PG não reconhecem bem o adequado posicionamento, mas detectam com segurança o inadequado; a PPII acusa com segurança tanto o mau quanto o bom posicionamento da agulha, sendo a prova mais confiável dentre as estudadas.BACKGROUND: To evaluate tests for Veress needle tip placement intraperitoneally in the left hypochondrium for creating a pneumoperitoneum. METHODS

  6. Análise dos acidentes com agulhas em um hospital universitário: situações de ocorrência e tendências Análisis de accidentes con agujas en un hospital universitário: situaciones de ocurrencia y tendéncias Analysis of needlestick injuries at a university hospital: occurrence situations and tendencies

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    Maria Meimei Brevidelli

    2002-12-01

    Full Text Available Os acidentes com agulhas constituem um dos principais riscos de transmissão ocupacional de infecções por via sangüínea (AIDS, hepatite B e C. É prioritário, portanto, discutir estratégias de intervenção baseadas nas fontes de risco. O objetivo deste estudo foi analisar os acidentes com agulhas ocorridos em um hospital universitário. A construção de um banco dados dos acidentes notificados, entre 1990 e 1996, permitiu identificar as situações de ocorrência e as tendências ao longo dos anos. Os resultados indicam que a maioria dos acidentes estava relacionada à realização ou auxílio de procedimentos. A implantação das primeiras medidas preventivas (precauções universais aponta para a redução no total de acidentes com perfurações. Não foram observadas alterações nas taxas de acidentes relacionados à prática de reencapar agulhas. Discute-se o uso de diferentes estratégias de intervenção: introdução de materiais de design seguro; mudança de enfoque no treinamento e reorganização do ambiente e das práticas de trabalho.Los accidentes con agujas constituyen uno de los principales riesgos de adquisición de infecciones (SIDA, hepatitis B y C. Por lo tanto, es prioritario discutir estrategias de intervención basadas en las fuentes de riesgo. El objetivo de este estudio fue analizar los accidentes con agujas ocurridos en un hospital universitario. La elaboración de un banco de datos permitió identificar las situaciones de ocurrencia de estos accidentes y las tendencias a largo plazo. Los resultados indican que la mayoría de los accidentes estaba relacionada con la realización o ayuda en los procedimientos. La implantación de las primeras medidas preventivas (precauciones universales muestra la reducción parcial de accidentes perforantes. No se observaron alteraciones en las tasas de accidentes relacionados a la práctica de recubrir agujas. Se discute el uso de diferentes estrategias de intervencion

  7. Impacto dos conectores sem agulhas na infecção da corrente sanguínea: revisão sistemática Impacto de los conectores sin agujas en la infección de la corriente sanguínea: revisión sistemática Impact of needleless connectors in the bloodstream infection: a systematic review

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    Silvia Helena Frota Mendonça

    2010-01-01

    Full Text Available Esta revisão sistemática buscou evidenciar o impacto do uso de conectores sem agulhas para sistema fechado de infusão na ocorrência de infecção da corrente sanguínea relacionada ao cateter venoso central. A amostra constitui-se de 14 estudos, os quais investigaram somente conectores sem agulhas. A infecção da corrente sanguínea relacionada ao cateter venoso central foi o desfecho de nove estudos. Seis apresentaram diferenças a favor do conector valvulado; quatro a favor do conector puncionável com cânula; um a favor do conector puncionável com agulha; um a favor do conector valvulado com pressão positiva e dois a favor do dispositivo usado antes da troca. A heterogeneidade dos estudos não permitiu a realização de metanálise.Esta revisión sistemática buscó evidenciar el impacto del uso de conectores sin agujas para sistemas cerrados de infusión en el caso de ocurrir una infección en la corriente sanguínea relacionada al catéter venoso central. La muestra fue constituida de 14 estudios, los cuales investigaron solamente conectores sin agujas. La infección de la corriente sanguínea relacionada al catéter venoso central fue el resultado de nueve estudios. Seis presentaron diferencias a favor del conector de válvula; cuatro a favor del conector para punción con cánula; uno a favor del conector para punción con aguja; uno a favor do conector de válvula con presión positiva y dos a favor del dispositivo usado antes del cambio. La heterogeneidad de los estudios no permitió la realización de una meta-análisis.This systematic review was intended to evaluate the impact of using needleless connectors in closed infusion systems in the event of a bloodstream infection related to central venous catheter. The sample consisted of 14 studies, which investigated only needleless connectors. The bloodstream infection related to central venous catheter was the result of nine studies. Six produced evidence in favor of the valve

  8. Kriptojenik organize pnömoni tanısında tru-cut biyopsi

    OpenAIRE

    Balcan, Baran; Olgun, Şehnaz; Sağmen, Seda Beyhan; Bağcı Ceyhan, Berrin

    2015-01-01

    Cryptogenic organizing pneumonia (COP) was first described by Davison and colleagues in 1983. Previously, it was called bronchiolitis obliterans organizing pneumonia (BOOB). The following are known causes of COP: toxic gas inhalation, chemotherapy, radiation therapy, aspiration, blood transfusion, upper respiratory tract infections, or it can be idiopathic. The clinical features of the patients resemble those of pneumonia or upper respiratory tract infection. In COP, imaging scans of the lung...

  9. Fine needle aspirating and cutting is superior to Tru-cut core needle in liver biopsy

    Institute of Scientific and Technical Information of China (English)

    Guo-Ping Li; Gao-Quan Gong; Xiao-Lin Wang; Yi Chen; Jie-Min Cheng and Chang-Yu Li

    2013-01-01

    BACKGROUND: Liver  biopsy  is  the  "gold  standard"  for evaluating liver disorders, but controversies over the potential risk of complications and patient discomfort still exist. Using a 21G fine needle, we developed a new biopsy procedure, fine needle aspirating and cutting (FNAC). Our procedure obtains enough  tissue  for  pathological  examination  and  meanwhile, reduces the risk of biopsy complications. The present study was to determine the safety and efficiency of 21G FNAC compared with 18G Tru-cut core needle (TCN) in liver tumor biopsies. METHODS: Ninety-four patients with unresectable malignant tumors were included in this study. Patients were divided into 2 groups: 18G TCN and 21G FNAC. The total positive rate (TPR) and safety of both groups were compared. RESULTS: TPR was not different between the two groups. Liver puncture  track  subcapsular  hemorrhage  and  arteriovenous shunt  were  reported  with  18G  TCN  but  not  with  21G  FNAC. The incidence of pain caused by biopsy was higher for the 18G TCN group compared to the 21G FNAC group (P0.5  cm,  but  52.1%  in  the  21G  FNAC  group  (P CONCLUSIONS: TPR is not different between the 21G FNAC and 18G TCN biopsy procedures, but the safety of 21G FNAC is superior to that of 18G TCN. Tissues obtained by either of these two procedures are sufficient for a pathological diagnosis.

  10. Punção aspirativa por agulha fina no diagnóstico de linfadenopatias e tumores sólidos em crianças e adolescentes Fine needle aspiration biopsy in the diagnosis of lymphadenopathies and solid tumors in children and adolescents

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    Wallace Acioli Freire de Gois

    2008-02-01

    Full Text Available OBJETIVO: Avaliar a importância diagnóstica da punção aspirativa por agulha fina (PAAF em crianças e adolescentes portadores de linfadenopatias e tumores sólidos. MÉTODOS: Análise retrospectiva dos pacientes com idade igual ou inferior a 18 anos, atendidos no Centro de Pediatria Cirúrgica do Hospital Universitário de Brasília, Universidade de Brasília, no período de julho de 2000 a julho de 2005. Foram calculados: sensibilidade, especificidade, precisão (acurácia diagnóstica, valor preditivo positivo e valor preditivo negativo. RESULTADOS: Em 50 pacientes estudados, os resultados da PAAF mostraram sensibilidade de 90,9%; especificidade de 100%, precisão diagnóstica de 95% e valores preditivos positivo e negativo de 100% e 90%, respectivamente. CONCLUSÃO: Em nossa experiência, a PAAF é um método preciso, simples e seguro, útil no diagnóstico de linfadenopatias e tumores sólidos em crianças e adolescentes.BACKGROUND: To evaluate the diagnostic value of the fine needle aspiration biopsy in children and adolescents with solid tumors or lymphadenopathy. METHODS: 18 years old or less patients were observed since July 2000 to July 2005. We observed: sensibility, specificity, diagnostic accuracy and predictive value. RESULTS: In 50 studied patients the fine needle aspiration biopsy we found 90.9% sensibility, 100% specificity, 95% diagnostic accuracy, 100% positive predictive value and 90% negative predictive value. CONCLUSION: The fine needle aspiration biopsy is a easy, safe and accurate diagnostic method for solid tumors and lymphadenopathies.

  11. Randomized clinical trial to assess pain and bruising in medicines administered by means of subcutaneous and intramuscular needle injection: Is it necessary to have needles changed? Ensayo clínico aleatorio para evaluación del dolor y hematoma durante la administración de medicamentos por vía subcutánea e intramuscular: ¿Es necesario cambiar las agujas? Ensaio clínico randomizado para avaliação de dor e hematoma em administração de medicamentos por via subcutânea e intramuscular: há necessidade de troca de agulhas?

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    Luiz Carlos Ribeiro Lamblet

    2011-10-01

    Full Text Available This clinical trial aimed at comparing the intensity of pain and bruising by subcutaneous and intramuscular injections using and retractable fixed syringes and needles and syringes with no needles combined, at a public hospital in Sao Paulo, for six months. We evaluated the perception of pain in case of intramuscular (n=1000 and subcutaneous injections (n=240. In subcutaneous application, bruise formation was also verified. Pain and bruising scores were higher in the group with no needles combined (pEste ensayo clínico tuvo como objetivo comparar la intensidad del dolor y hematoma de inyecciones por vía subcutánea e intramuscular utilizando jeringas y agujas fijas retráctiles y jeringas con agujas no conjugadas, en un hospital público en la ciudad de Sao Paulo, durante seis meses. Fue evaluada la percepción del dolor de la inyección intramuscular (n=1000 y la subcutánea (n=240. En la aplicación por vía subcutánea se verificó también la formación de hematoma. La puntuación del dolor y hematoma fue mayor en el Grupo con agujas no conjugadas (pEste ensaio clínico teve como objetivo comparar a intensidade da dor e hematoma consequentes a injeções por via subcutânea e intramuscular, utilizando seringas e agulhas fixas retráteis e seringas com agulhas não conjugadas, em hospital público na cidade de São Paulo, durante seis meses. Foi avaliada a percepção da dor na injeção intramuscular (n=1.000 e na subcutânea (n=240. Na aplicação por via subcutânea, verificou-se também a formação de hematoma. A pontuação de dor e hematoma foi maior no grupo com agulhas não conjugadas (p<0,001 e p<0,029, respectivamente. O poder do teste em relação à escala de dor foi de 0,98. Recomenda-se o uso de agulha fixa retrátil na aplicação de injeções intramusculares e subcutâneas. Registro de ensaio clínico nº NCT01271608.

  12. Punção aspirativa por agulha fina: desempenho no diagnóstico diferencial de nódulos mamários palpáveis Fine needle aspiration biopsy: performance in the differential diagnosis of palpable breast masses

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    Orlando José de Almeida

    1998-09-01

    Full Text Available Objetivo: avaliar, de forma prospectiva, o desempenho da punção aspirativa por agulha fina (PAAF no diagnóstico diferencial de nódulos mamários palpáveis. Método: avaliaram-se a sensibilidade, a especificidade, os valores preditivos e a acurácia deste teste em 102 mulheres com idade superior a 30 anos, com nódulos mamários palpáveis, atendidas na Universidade Estadual de Campinas. As punções foram realizadas por um único examinador. Resultados: o procedimento teve sensibilidade de 97%, especificidade de 87%, valor preditivo positivo de 94% e negativo de 93%. A taxa de material insuficiente ou insatisfatório foi de 16% na primeira punção, diminuindo para 2% com uma nova PAAF. Conclusões: Este teste mostrou-se altamente sensível e específico no diagnóstico diferencial de nódulos mamários palpáveis, reafirmando-se a sua grande importância na abordagem clínica de nódulos palpáveis.Purpose: to evaluate, in a prospective way, the performance of the fine needle aspiration biopsy in the differential diagnosis of palpable breast masses. Method: the sensitivity, specificity, positive and negative predictive values for this test were evaluated in 102 women with age above 30 years and a palpable breast mass, who were attended at the University of Campinas. All punctures were performed by the same examiner. Results: the procedure had a sensitivity of 97%, specificity of 87%, positive predictive value of 94% and negative predictive value of 93%. The insufficient or unsatisfactory sample rate was 16% for the first aspiration, decreasing to 2% with a new procedure. Conclusions: this test showed to be highly sensitive and specific for the differential diagnosis of palpable breast masses, reassuring its great importance for the clinical approach of palpable masses.

  13. Carcinoma mucinoso invasor da mama e seus diagnósticos diferenciais em biópsia por agulha grossa: revisão da literatura Mucinous invasive carcinoma of the breast and its differential diagnosis by core biopsy: review of the literature

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    Juliana Silva Zanetti

    2010-04-01

    Full Text Available A biópsia por agulha grossa (BAG, ou core biopsy, é uma técnica utilizada para retirar pequenos cilindros de tecido mamário. Além de lesões palpáveis, o desenvolvimento de técnicas radiológicas acuradas de localização de lesões mamárias difundiu o uso da BAG como primeira abordagem histológica de lesões não palpáveis. O diagnóstico diferencial do carcinoma mucinoso com lesões mucinosas benignas por BAG pode ser desafiador, principalmente se a lesão apresentar extravasamento de mucina. A acurácia do diagnóstico nesses casos é de extrema relevância para determinar o tipo de procedimento a ser realizado e o tratamento a ser seguido. Este estudo traz revisão e atualização da literatura sobre carcinoma mucinoso invasor da mama e seus diagnósticos diferenciais, com ênfase nos desafios para diagnóstico por intermédio da BAG. Entre os diagnósticos diferenciais estão alterações fibrocísticas com mucina luminal, lesões mucinosas papilares e mucocele-símile (que variam desde as benignas até aquelas associadas a hiperplasia ductal atípica e carcinoma ductal in situ. Alterações mucinosas também podem ser encontradas em uma variedade de lesões, como fibroadenoma e tumor phyllodes, adenoma pleomórfico e mucinose nodular. Conclui-se que a BAG é uma técnica confiável para diagnóstico de carcinoma mucinoso da mama e seus diagnósticos diferenciais, porém, em casos de dúvida ou de escassez de material, é prudente realizar biópsia excisional para melhor esclarecimento do diagnóstico.The needle core biopsy is a technique applied to remove small cylinders of breast tissue. The development of accurate radiological techniques for location of breast lesions has spread the use of core biopsy as the first histological approach to non-palpable lesions. The differential diagnosis of mucinous carcinoma and benign mucinous lesions by core biopsy may be challenging, mainly when the lesion shows mucin extravasation. The

  14. Preoperative assessment of thyroid nodules: role of ultrasonography and fine needle aspiration biopsy followed by cytology Avaliação preoperatória de nódulos thireóides: papel da ultrassonografia e da biópsia de aspiraçào por agulha fina, seguida de citologia

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    Rosalinda YA Camargo

    2007-01-01

    Full Text Available PURPOSE:To evaluate the preoperative assessment of thyroid nodules using ultrasound studies and cytology of nodular aspirates. SUBJECTS AND METHODS: 2,468 patients with thyroid nodules were examined from 1999 to 2005. All patients were clinically examined and underwent ultrasonography followed by fine-needle aspiration biopsy (FNAB and cytology. RESULTS:Nodules larger than 10 mm were classified ultrasonographically in a 4-tier system and received a score according to the criterion of possible malignancy. Cytological examinations were conducted independently by 2 cytologists and classified as benign (score 1, indeterminate (score 2, suspicious (score 3, and malignant (score 6. Combining both scores, an index was generated that would indicate a higher probability of malignancy (benign, doubtful, suspicious, and malignant. Thyroid surgery was performed in 274 patients. Of those, 115 patients had a score of 2 to 5 and only 8 had a histological diagnosis of thyroid cancer (6.9%. For patients with a score of 5 (n = 51, 11.5% had a malignant lesion, and 51% of the 61 patients with a score of 6 had confirmed thyroid cancer. Of the 98 patients with a combined score of 7 to 10, 99% had a histological confirmation of malignancy. CONCLUSIONS: The index score had a sensitivity of 94.1% and specificity of 77.5%. The overall accuracy was 85.8%. Therefore, we concluded that this methodology may improve the preoperative diagnosis of thyroid cancer in nodules larger than 10 mm. Association with other methods such as color Doppler echography, serum TSH concentration, galectin-3 expression analysis, and FDG/PET scan would be useful in avoiding the higher costs of thyroid surgical procedures.OBJETIVO: Avaliar a possibilidade de diagnóstico pré-operativo de nódulos da tireóide (de diâmetro superior a 10mm usando ultra-sonografia da glândula tireóide e citologia de punção aspirativa por agulha fina guiada pela ultra-sonografia. CASUÍSTICA E MÉTODOS: N

  15. Refuerzo a cortante de elementos de hormigón armado mediante laminados de fibra de carbono

    OpenAIRE

    Otero García, Álvaro

    2013-01-01

    El refuerzo de estructuras puede venir motivado por cambios de uso en la estructura, deterioro de la misma con la consecuente pérdida de capacidad portante o incluso por errores de proyecto o ejecución. En todos estos casos, los refuerzos consistentes en la adhesión de laminados de polímeros reforzados con fibras (FRP), resultan una alternativa frente a otras técnicas tradicionales, debido a sus características y prestaciones. Pese a la existencia de múltiples formulaciones para el cálculo de...

  16. Correct Pre-Operative Diagnosis of Breast Cancer by Tru-cut Biopsy: Key Point in Breast Cancer Management and a Part of Patient Right

    OpenAIRE

    A. Joulaee; M Kalantari; M. Salamati

    2009-01-01

    The new revolutionary concept in breast cancer diagnosis and management during the last 3 decades significantly decreases invasion against patients while maximizing the accuracy of diagnosis and the effectiveness of treatment."n"n In this new concept team work multidisciplinary approach is the key. The presence of an interventional breast radiologist in this new approach is absolutely necessary. The role of an interventional and a non interventional breast radiologist in this team w...

  17. Diagnostic role of ultra sound and computed tomography guided fine-needle aspiration cytology and Tru-cut biopsy experienced in 50 adult patients of mediastinal diseases

    OpenAIRE

    Dibyendu Saha; Jaydip Deb

    2015-01-01

    Context: Etiology and clinical spectrum of mediastinal diseases are very wide. Clinico-radiological pattern of mediastinal diseases depends on the size, location and etiology. Hence, noninvasive approach to these cases sometimes leads to diagnostic dilemma. Aims: We performed a prospective study over a 1-year period with the objective of evaluation of diagnostic yields and risk of trans thoracic ultra sound (TTUS) and computed tomography (CT) guided fine-needle aspiration cytology (FNAC) and ...

  18. High-latitude forcing of diatom productivity in the southern Agulhas Plateauduring the past 350kyr

    OpenAIRE

    Romero, O.E.; Kim, J. H.; Bárcena, M.A.; Hall, Ian R.; Zahn, Rainer; R. Schneider

    2015-01-01

    The hydrography of the Indian-Atlantic Ocean gateway has been connected to high-latitude climate dynamics by oceanic and atmospheric teleconnections on orbital and suborbital timescales. A wealth of sedimentary records aiming at reconstructing the late Pleistocene paleoceanography around the southern African continent has been devoted to understanding these linkages. Most of the records are, however, clustered close to the southern South African tip, with comparatively less attention devoted ...

  19. Incidência de acidentes de trabalho relacionada com a não utilização das precauções universais

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    Marcia de Souza

    1993-12-01

    Full Text Available Entrevistados todos (57 os funcionários do serviço de enfermagem de um hospital geral governamental de São Paulo, que sofreram acidentes de trabalho relacionados a materiais pérfuro-cortantes, ou que tiveram contato com sangue ou fluidos corpóreos contaminados no período de janeiro a setembro de 1992. Desses, 15,8% (9 eram enfermeiras, 49,1% (28 auxiliares de enfermagem, 33,3% (19 atendentes de atendentes de enfermagem e 1,8% (1 escriturária, que apresentavam idade inferior a 40 anos. 66,1% possuiam 2º grau completo ou superior e entre 4 a 7 anos de experiência na função. Em relação ao turno de trabalho, 49,1% dos acidentes ocorreram pela manhã e 38,7% durante a noite, principalmente no Pronto Socorro (36,8%. Materiais pérfuro-cortantes foram responsáveis por 71 ,9% dos acidentes, sendo 75,0% entre os auxiliares de enfermagem. Os funcionários acidentados atribuiram a causa do acidente: a fatalidade, ao descuido ou imprudencia da equipe medica e ao reencape de agulhas. Quanto as consequencias, 57,0% dos acidentados por. respingo de secreção nos olhos desenvolveram conjuntivite e uma das funcionárias, Hepatite B. Este estudo mostrou que 78,1 % dos acidentes poderiam ter sido evitados, 57,0% apenas com o uso das Precauções Universais.

  20. Acidente com material biológico no atendimento pré-hospitalar móvel: realidade para trabalhadores da saúde e não saúde

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    Anaclara Ferreira Veiga Tipple

    2013-06-01

    Full Text Available Estudo analítico transversal, com objetivos de identificar a prevalência e caracterizar os acidentes com material biológico entre profissionais do Atendimento Pré-Hospitalar (APH e comparar os comportamentos de risco adotados entre os grupos saúde e não saúde que podem influenciar na ocorrência e na gravidade destes acidentes. Dados foram obtidos por meio de questionário aplicado a todos os trabalhadores do APH de Goiânia - GO. Verificou-se alta prevalência de acidentes envolvendo material biológico que, apesar de maior no grupo saúde, também acometeu o grupo não saúde. Comportamentos de risco, estatisticamente significativos (p<0,05, para ocorrência de acidentes em ambos os grupos: não uso de luvas, máscara e óculos de proteção, descarte inapropriado de perfuro-cortante, vestimenta incompleta, reencape de agulhas e não imunização contra hepatite B. Os dados evidenciaram a importância da adesão às medidas preventivas por ambos os grupos e a necessidade de estruturação e implementação de um sistema de vigilância e controle deste tipo de acidente.

  1. Análisis de los modelos de comportamiento de vigas de hormigón armado reforzadas a cortante con polímeros armados con fibras (frp). Validación y calibración experimental

    OpenAIRE

    Alzate Ramírez, Albert Leonard

    2012-01-01

    Los polímeros armados con fibras (FRP) se utilizan en refuerzos de estructuras de hormigón debido sobre todo a sus excelentes propiedades mecánicas, su resistencia a la corrosión y a su ligereza que se traduce en facilidad y ahorro en el transporte, puesta en obra y aplicación, la cual se realiza de forma muy rápida, con pocos operarios y utilizando medios auxiliares ligeros, minimizándose las interrupciones del uso de la estructura y las molestias a los usuarios. Las razones presentadas ante...

  2. Estudio del comportamiento mecánico de vigas de hormigón armado reforzadas a flexión y a cortante con materiales compuestos de matriz cementítica

    OpenAIRE

    Escrig Pérez, Christian

    2015-01-01

    The global tendency to apply sustainability criteria in most of productive fields, as well as, the limited durability and the pathologies that suffer the reinforced concrete elements, are aspects that directly affect the increasing necessity of strengthening this type of structures. Reinforced concrete beams are frequently subjected to bending and shear efforts. The evolution of strengthening techniques, that permit to increase the load bearing capacity in front this type of efforts, has c...

  3. OCORRÊNCIA DE ACIDENTES COM MATERIAS PERFUROCORTANTES COM ENFERMEIROS NO AMBIENTE HOSPITALAR

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    PEREIRA, J.M.D.A.

    2015-09-01

    Full Text Available Segundo a Organização Internacional do Trabalho (OIT, cerca de 2,2 milhões pessoas morrem anualmente em ocorrência de acidentes e doenças de origem profissional, os quais geralmente são causados pelo não uso de equipamento de proteção individual (EPI, desobediência a normas e procedimentos; negligência profissional, imprudência pessoal e, terceirização de serviços. Neste contexto destacamos os enfermeiros, pois desempenham um trabalho de assistência direta e contínua ao paciente, tornando-se susceptível a contaminação por material biológico, principalmente em acidentes por inoculação percutânea mediada por agulhas ou instrumentos cortantes, que são os maiores responsáveis pela transmissão ocupacional de infecções sanguíneas. A prevenção de acidentes de trabalho deve ser uma preocupação tanto pelos profissionais quanto pelas instituições hospitalares. Os profissionais devem ser conscientes em relação à necessidade de conhecer e empregar adequadamente as normas de biossegurança e exigir segurança no ambiente hospitalar aos seus empregadores para o exercício assistencial com menor risco para a saúde ocupacional. Isto é de fundamental importância, uma vez que os profissionais de saúde e principalmente os de enfermagem, se opõem a utilização de equipamentos de proteção individual, subestimando o risco de se infectarem. Diante da frequência da ocorrência de acidentes de trabalho ocasionados por material perfuro cortante, que podem ser observados na atuação do enfermeiro, deve-se preocupar com implementação de práticas que lhe oferecem condições seguras para o desempenho de suas atividades laborais. Esta pesquisa terá como objetivo identificar o índice de acidentes com materiais perfurocortantes com enfermeiros nos diversos setores do hospital. Trata-se de um estudo retrospectivo descritivo, com abordagem quantitativa dos dados, no qual tem por finalidade se basear em dados de acidentes

  4. Raquianestesia unilateral com baixa dose de bupivacaína a 0,5% hiperbárica Raquianestesia unilateral con baja dosis de bupivacaína a 0,5% hiperbárica Unilateral spinal anesthesia with low 0.5% hyperbaric bupivacaine dose

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    Luiz Eduardo Imbelloni

    2004-10-01

    Full Text Available JUSTIFICATIVA E OBJETIVOS: A raquianestesia unilateral pode apresentar vantagens, principalmente em pacientes ambulatoriais. Baixas doses da solução anestésica, agulhas ponta de lápis ou ponta cortante, lenta velocidade de injeção e a posição lateral têm sido relatados como facilitadores da produção de raquianestesia unilateral. O presente estudo longitudinal investiga o grau de raquianestesia unilateral utilizando 5 mg de bupivacaína a 0,5% hiperbárica injetada através de agulha 27G tipo Quincke no paciente em decúbito lateral, com membro a ser operado voltado para baixo. MÉTODO: Raquianestesia com bupivacaína a 0,5% foi realizada através da agulha 27G Quincke em 30 pacientes estado físico ASA I e II, submetidos à cirurgias ortopédicas. A punção subaracnóidea foi realizada com o paciente previamente colocado com o lado a ser operado voltado para baixo e foram injetados 5 mg de bupivacaína a 0,5% hiperbárica na velocidade de 1 ml.15s-1. Bloqueios sensitivo e motor (picada de agulha e escala de 0 a 3 foram comparados entre os lados a ser operado e o contralateral. RESULTADOS: Os bloqueios motor e sensitivo entre o lado operado e o contralateral foram significativamente diferentes em todos os momentos. Raquianestesia unilateral foi obtida em 85,7% dos pacientes. Estabilidade hemodinâmica foi observada em todos os pacientes. Nenhum paciente desenvolveu cefaléia pós-raquianestesia. CONCLUSÕES: Nas condições deste estudo a bupivacaína hiperbárica a 0,5% (5 mg proporcionou um predominante bloqueio unilateral. Vinte minutos foram suficientes para a instalação do bloqueio. As principais vantagens da raquianestesia unilateral são a estabilidade hemodinâmica, a satisfação do paciente e recuperação mais rápida da anestesia.JUSTIFICATIVA Y OBJETIVOS: La raquianestesia unilateral pode presentar ventajas, principalmente en pacientes ambulatoriales. Bajas dosis de la solución anestésica, agujas punta de lápiz o

  5. DIAGNÓSTICO COMPARATIVO ENTRE CITOLOGIA ASPIRATIVA POR AGULHA FINA E AVALIAÇÃO HISTOLÓGICA DA GLÂNDULA MAMÁRIA DE CADELAS

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    Noeme Souza Rocha

    2005-12-01

    Full Text Available In a purpose to confirm the efficiency of Fine needle aspiration cytology (FNAC for the diagnosis of lesions of the female dog mammary gland a study was conducted during a period of one year. 21 mastitis, 21 benign tumors and 17 malignant tumors were studied in 148 bitches, ranging from 3 to 17 years old. The histological examination was performed in most cases. The correlation between the results of the histological and the cytological examination was studied. The correlation between the results of the histological and the cytological examination was detected in 80% of all cases. The limitations of the FNAC are the false-positive cases. Since the diagnosis can not definitely diagnose, a surgical biopsy and histopathology should be done when there is a suspicion of clinically and not cytologically confirmed malignancy. In a clinical context, the method has much to offer by preventing bitches from suffering inappropriate surgeries and investigations and allowing surgeons to plan quickly and more rationally.

  6. Suprapapillary needle puncture for common bile duct access: laboratory profile Punção suprapapilar por agulha para acesso ao ducto biliar comum: perfil laboratorial

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    Everson L. A. Artifon

    2006-12-01

    Full Text Available BACKGROUD: Biliary cannulation to perform endoscopic retrograde cholangiopancreatography may be difficult due to technical reasons and often is necessary to perform papillotomy, where complications as pancreatitis and perforation may occur AIM: To show minimal complications by a new model of biliary access by means of the suprapapillary needle puncture and its laboratory profile. PATIENTS AND METHODS: After the approval of the protocol by the Scientific Ethics Committee of the institution a free and informed consent was signed by all patients participating in the study. From July 2003 to August 2004, fulfilling the inclusion and exclusion criteria, 30 patients were selected for endoscopic retrograde cholangiopancreatography, using the suprapapillary puncture technique. All patients remained hospitalized, fasting and with basal hydroelectrolytic replacement, were clinically followed up and samples for the determination of serum amylase, lipase and C-RP (C-reactive protein were collected before and 4 h, 12 h and 24 h after the procedure and reevaluated 60 days after the procedure. Laboratory parameters were submitted to statistical study using analysis of variance for repeated measurements. Multiple comparisons were made based on Wald's statistics RESULTS: The technique was successful in 93.4% (28/30 of the patients. No statistically significant difference regarding to the laboratory profile were observed. Complications related to the technique of papillary puncture occurred in 1/28 patients by not using the guide wire and in 1/28 where mild hemorrhage after dilation of the papillary fistula occurred. Regarding complications related to therapeutic procedures, there were 2/28 retroduodenal perforations, with one (1/30 following unsuccessful puncture and another due to the passage of Dormia's basket through the dilated fistula path. All patients submitted to diagnostic puncture and evaluated 60 days after the procedure presented with the major duodenal papilla of normal aspect. The patients with dilation of the suprapapillary fistula showed the fistula continuing to drain clear bile CONCLUSION: Suprapapillary puncture allows investigative and therapeutic procedures without significant increases in amylase, lipase and C-RP. Patients submitted to diagnostic puncture present complete recovery of the papilla, while dilation of the fistula maintains it pervious later on, but without complications.RACIONAL: A cateterização para acesso às vias biliares na colangiopancreatografia retrógrada pode apresentar dificuldades técnicas, sendo necessário freqüentemente efetuar-se papilotomia, procedimento não isento de complicações como perfuração e pancreatite OBJETIVOS: Demonstrar menor incidência de complicações a partir do perfil laboratorial, através de nova técnica desenvolvida, a punção suprapapilar MATERIAL E MÉTODOS: Após aprovação pelo Comitê de Ética em Pesquisa da instituição, 30 pacientes foram selecionados no período de julho de 2003 a agosto de 2004. Preenchidos os critérios de inclusão e exclusão, os pacientes, após explicação do protocolo e a assinatura do consentimento livre e esclarecido, foram submetidos a colangiopancreatografia retrógrada pela técnica de punção suprapapilar. Após o procedimento, foi feito seguimento com o paciente internado para avaliar possíveis complicações, bem como determinação dos níveis séricos da amilase, lipase e proteína C reativa nas 4 h, 12 h e 24 h subseqüentes e reavaliados 60 dias após. O estudo estatístico foi feito por análise de variância para medidas múltiplas e comparações múltiplas foram feitas por meio do teste de Wald RESULTADOS: O sucesso da técnica ocorreu em 93,4% (28/30 dos pacientes. Não foram observadas alterações estatisticamente significantes no perfil laboratorial. Complicações relacionadas à técnica de punção ocorreram em dois pacientes: um pelo não uso do fio guia e em outro por hemorragia, após dilatação da papila. Relacionadas ao procedimento, ocorreram duas perfurações retroduodenais: uma decorrente de punção e outra após passagem do cesto de Dormia pela fístula dilatada. Após seguimento de 60 dias, nenhuma complicação foi observada CONCLUSÃO: Punção suprapapilar permite procedimentos investigativos e terapêuticos sem aumento significativo da amilase, lipase e proteína C reativa. Na punção diagnóstica ocorre reepitelização completa da papila, enquanto na dilatação da fístula mantém-se a perviedade, porém sem complicações.

  7. Análisis de dos modelos por el método dinámico para el diseño sísmico de edificios.

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    Arnulfo Luévanos Rojas

    2011-01-01

    Full Text Available En la presente investigación se propone un modelo por el método dinámico para el diseño sísmico de edificios, el cual considera las deformaciones por cortante, que es una innovación al método tradicional, el cual se utiliza para analizar toda clase de estructuras que están sujetas a movimientos del suelo. Esta metodología toma en cuenta las deformaciones por cortante y se hace una comparación con el método tradicional. El análisis se desarrolló para un edificio de cuatro niveles con estructura de acero. El modelo 1, desprecia las deformaciones por cortante y el modelo 2, considera las deformaciones por cortante. En cuanto a los resultados del problema considerado que se presentan en las tablas se observa que el modelo 2 es ligeramente más económico, en cuanto a los elementos mecánicos (Fuerzas axiales, Fuerzas cortantes y Momentos que actúan sobre cada uno de los miembros de la estructura. Por lo tanto, la práctica usual de no tomar en cuenta las deformaciones por cortante, no será una solución recomendable y se propone que se deben de considerar las deformaciones por cortante y además se apega más a las condiciones reales.

  8. Adesão às medidas de precaução-padrão: relato de experiência Adhesión a las medidas de precaución padrón: relato de experiencia Adoption of standard precautions: a report

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    Maria Helena Baena de Moraes Lopes

    1999-10-01

    Full Text Available Durante 1993 e 1994 foi realizada reciclagem em Precauções-Padrão para os profissionais de enfermagem do Centro de Atenção Integral à Saúde da Mulher (CAISM. Em 1995 foi avaliada, por observação direta nos setores, a adesão a estas medidas, o uso adequado, a acessibilidade e disponibilidade de luvas e caixas para descarte de materiais pérfuro-cortantes. Registraram-se 60 observações e 232 procedimentos. Em 164 (71% destes houve adoção das medidas, não ocorrendo o mesmo em outros 68 (29%. Evidenciou-se a necessidade de enfatizar a lavagem de mãos e o não-reencape de agulhas.Durante el periodo de 1993 y 1994 se realizó la actualización en medidas de precaución patrón para los profisionales de enfermeria del Centro de Atención Integral a la Salud de la Mujer (CAISM. En 1995, se realizó una evaluación a través de la observación directa en los sectores; la adhesión a estas medidas, el uso adecuado y la disposición de guantes y cajas para descarte de materiales corto-punzantes. Se registraron 60 observaciones e 232 procedimientos, 164 de ellos (71% adoptaron el uso de las medidas y en 68 (29% esto no ocurrió. Es evidente la necesidad de dar énfasis al lavado de las manos y colocar de nuevo la camisa (tapa a las agujas.During 1993 and 1994, a recycling program on Standard Precautions was conducted for the nursing personnel at the Women's Health Centre (CAISM. In 1995, an evaluation was obtained through direct observation of these sectors regarding the adoption of these measures, the adequate use, access and availability of gloves and boxes for the disposal of perforating, sharp material. Sixty observations and 232 procedures were reported. One hundred sixty four procedures (71% adopted these measures and 68 procedures (29% did not. It was evident that the need to wash hands and not to use needles twice should be emphasized.

  9. Biological risk in nursing care provided in family health units Situaciones de riesgo biológico presentes en la asistencia de enfermería en las unidades de salud de la familia (USF Situações de risco biológico presentes na assistência de enfermagem nas unidades de saúde da família (USF

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    Ana Carla Moreira Cardoso

    2010-06-01

    Full Text Available There is very frequent exposure to potentially contaminated material in procedures performed by nursing professionals. This exploratory and descriptive study characterizes the potential risk of biological exposure in procedures performed by nursing professionals in ten Family Health units in São Carlos-SP, Brazil. We observed 238 procedures involving potential risk of contact with biological material, in which more than 90% involved the use of needles. The average rates of adherence to standard precautions were: 27.9% hand washing prior to procedures; 41.4% use of gloves; and 88.8% adequate disposal of piercing and cutting instruments. These professionals are subject to risks similar to those which hospital workers are also subjected, because they have a high risk of blood exposure and the frequency with which they handle needles is very high.La exposición a material potencialmente contaminado es frecuente en las actividades del profesional de enfermería. Este estudio, de carácter exploratorio y descriptivo con abordaje cuantitativo, tuvo como objetivo caracterizar los riesgos potenciales de exposición biológica en las acciones desarrolladas por los profesionales de enfermería en diez USFs del municipio de Sao Carlos, SP. Fueron observados 238 procedimientos con posible riesgo de contacto con material biológico, siendo que más de 90% de estos envolvían el uso de agujas. Previo al procedimiento, la tasa promedio general de adhesión a las precauciones estándar fue de 27,9% en el lavado de manos, 41,4% en el uso de guantes y de 88,8% en el descarte adecuado de material punzo cortante. Se concluye que esos profesionales están sujetos a riesgos semejantes a los encontrados en el área hospitalaria, una vez que también manipulan agujas con mucha frecuencia y poseen alto riesgo de exposición la sangre.Exposição a material potencialmente contaminado é frequente nas atividades do profissional de enfermagem. Este estudo, de car

  10. Repercussões do acidente com perfurocortantes para a enfermagem: uma construção a partir do grupo focal Repercusiones para la enfermería de accidentes con materiales punzo cortantes: construcción a partir del grupo focal Repercussions of accident with perforating-cutting instruments for the nursing: a construction based on the focal group

    OpenAIRE

    Magda Ribeiro de Castro; Sheila Nascimento Pereira de Farias

    2009-01-01

    O estudo tem como objetivos conhecer as repercussões do acidente com perfurocortantes para o trabalhador de enfermagem e discutir essas repercussões. Metodologia: estudo descritivo, qualitativo, desenvolvido em um hospital público federal de grande porte (RJ), tendo a equipe de enfermagem como sujeito. Utilizou-se o grupo focal como técnica para coleta de dados e a análise temática. Resultados: depreendeu-se que as repercussões do acidente apresentam duas facetas: repercussões desfavoráveis à...

  11. Sobre palheiros, agulhas, doutores e o conhecimento médico: o estilo de pensamento dos clínicos On haystacks, needles, doctors, and medical knowledge: the thought style of physicians

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    Kenneth R. de Camargo Jr.

    2003-08-01

    Full Text Available Este artigo, o segundo de uma série, apresenta um estudo desenhado para avaliar como os médicos operam mecanismos para selecionar a informação relevante e/ou confiável dentre o que lhes é apresentado. Vinte e quatro professores de clínica médica de duas faculdades de Medicina relevantes no Rio de Janeiro foram submetidos a entrevistas abertas. O referencial conceitual adotado é baseado no trabalho de Ludwik Fleck (estilo de pensamento. O modo de pensar que emerge deste conjunto de entrevistas pode ser caracterizado resumidamente como uma busca amplamente intuitiva, pragmática, orientada a resultados, por informação relevante (isto é, potencialmente útil na prática, selecionada de fontes com suficiente credibilidade acadêmica e submetida a um primado do conhecimento prático. Apesar deste ceticismo, entretanto, os médicos carecem de recursos (isto é, tempo, conhecimento de aspectos técnicos da pesquisa, particularmente em termos de epidemiologia e estatística para avaliar o conhecimento que os está continuamente alimentando à força.This paper, the second in a series, reports on a study designed to assess how physicians operate selective mechanisms to sort out relevant and/or reliable information from what is presented to them. Twenty-four professors of internal medicine from two leading medical schools in Rio de Janeiro, Brazil, answered open-ended interviews. The conceptual framework adopted is based on Ludwik Fleck's work (on thought style. The thought style that emerged from this set of interviews can be briefly characterized as a largely intuitive, pragmatic, results-oriented search for relevant (i.e., potentially useful in practice information, selected from sources with sufficient academic credibility and submitted to a primacy of practical knowledge. However, despite this skepticism, doctors lack resources (i.e. time, as well as knowledge of technical aspects of research, particularly in terms of epidemiology and statistics to effectively assess the knowledge that is constantly being force-fed to them.

  12. Punção aspirativa por agulha fina para diagnóstico de mastocitoma em cães Fine needle aspiration for diagnosis of mast cell tumors in dogs

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    G.E. Lavalle

    2003-08-01

    Full Text Available Fine needle aspiration (FNA associated with the cytological diagnosis mast cell tumor is a widely employed technique in human medicine, but it is still underused in veterinary medicine. The aim of this study was to demonstrate the efficacy of FNA technique for the diagnosis of mast cell tumors in dogs. Over one year period all dogs referred to the Veterinary Hospital of the Universidade Federal de Minas Gerais with tumor-like formations of the skin were submitted to FNA. In order to detect metastasis, both skin lesions and the regional lymph nodes were subjected to FNA. After surgical removal of the lesions, histological examination indicated a complete agreement with the cytological diagnosis. In conclusion, FNA technique is a good choice for diagnosis of mast cell tumors in dogs. In addition, FNA allows an adequate and early therapeutic planning.

  13. Raquianestesia contínua com altas doses de anestésicos locais Raquianestesia continua con altas dosis de anestésicos locales Continuous spinal anesthesia with high dose of local anesthetics

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    Luiz Eduardo Imbelloni

    2010-10-01

    Full Text Available JUSTIFICATIVA E OBJETIVOS: A maior vantagem da raquianestesia contínua é o melhor controle de nível, intensidade e duração da analgesia espinal. Com o advento dos cateteres intermediários (cateter por foral da agulha e sua baixa incidência de cefaleia e sintomas neurológicos, a técnica vem ganhando credibilidade. O objetivo de caso é relatar a possível segurança do uso do novo cateter com grande dose de bupivacaína hiperbárica a 0,5% com glicose a 1,6% associada à lidocaína 2% hiperbárica com glicose a 1,6%. RELATO DO CASO: Paciente do sexo masculino, 78 anos, 85 kg, 168 cm, estado físico ASA III, hipertenso, coronariopata e insuficiência renal crônica. Candidato à cirurgia de volumosas hérnias inguinal bilateral e umbilical, sendo submetido por uma semana a pneumoperitôneo para criar espaço. Após venóclise com cateter 18G, monitoração com cardioscópio, pressão arterial não invasiva e oximetria de pulso, foi sedado com 1 mg de midazolam e fentanil 100 µg por via venosa e colocado em decúbito lateral esquerdo. Submetido à raquianestesia contínua por via mediana em L3-L4, com conjunto de agulha cortante 27G e cateter 22G. A dose total de anestésico utilizada no procedimento foi 25 mg de bupivacaína 0,5% (hiperbárica com glicose a 1,6% e 160 mg de lidocaína 2% (hiperbárica com glicose a 1,6% e morfina (100 µg. Paciente acompanhado até o 30º dia sem queixa neurológica. CONCLUSÕES: Recentemente, a má distribuição do anestésico local através de microcateter foi atribuída como causa de síndrome de cauda equina. Este relato de caso mostrou que, com a administração de altas doses de anestésicos hiperbáricos através do novo cateter, não houve má distribuição nem risco de síndrome de cauda equinaJUSTIFICATIVA Y OBJETIVOS: La mayor ventaja de la raquianestesia continua es el mejor control del nivel de intensidad y duración de la analgesia espinal. Con el advenimiento de los cat

  14. A enfermagem frente a acidentes de trabalho com material potencialmente contaminado na era do HIV The nursing team and occupational accidents with potentially contaminated material in the era of HIV

    OpenAIRE

    Elucir Gir; Fabiana Prado Potiens Costa; Adriana Maria da Silva

    1998-01-01

    Realizou-se esta investigação, com os objetivos de identificar a ocorrência de acidentes de trabalho com material pérfuro-cortante potencialmente contaminado, entre enfermeiros e auxiliares de enfermagem de um Hospital de ensino geral do interior do Estado de São Paulo; relacionar a ocorrência destes acidentes com a categoria profissional e anos de trabalho na instituição; identificar o tipo de material pérfuro-cortante causador do acidente e identificar as condutas tomadas após o acidente, p...

  15. Indications, results, and clinical impact of endoscopic ultrasound (EUS)-guided sampling in gastroenterology

    DEFF Research Database (Denmark)

    Dumonceau, J-M; Polkowski, M; Larghi, A;

    2011-01-01

    This article is part of a combined publication that expresses the current view of the European Society of Gastrointestinal Endoscopy (ESGE) about endoscopic ultrasound (EUS)-guided sampling in gastroenterology, including EUS-guided fine needle aspiration (EUS-FNA) and EUS-guided trucut biopsy (EU...

  16. PICAR LA PIEZA [Material gráfico

    OpenAIRE

    Anonymous

    2004-01-01

    ESTA ACCIÓN CONSISTE EN REALIZAR LAS DIFERENTES MUESCAS CORTANTES QUE LLEVA EL FILO DE LA HOJA DE HOZ. CON UN MARTILLO GOLPEA SUAVEMENTE LA PARTE SUPERIOR DE LA "PULSETA" Y COMO CONSECUENCIA DE ELLO LA PUNTA DE LA PULSETA SE CLAVA EN LA HOJA DE LA HOZ.

  17. Melt-processing of SBS/polyaniline-based blends

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    Ricardo Herbé Cruz Estrada

    2013-01-01

    debido a que lotes del mismo tamaño fueron usados independientemente de la composición de las mezclas; lo que propició que los niveles de esfuerzos cortantes generados durante la extrusión no fueran suficientes para dispersar eficazmente PANICX en el interior del SBS.

  18. Eddies in the southern Mozambique Channel

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    Quartly, G.D.; Srokosz, M.A.

    2004-01-01

    The Agulhas Current system contains one of the world's strongest western boundary currents, and plays an important part in the warm water path of the global thermohaline circulation. However, there have been few surveys of the source regions of the Agulhas Current, and thus little in situ measurement of their variability. Utilizing the more than 5-year record of SeaWiFS data, we examine the eddy activity present in the southern portion of the Mozambique Channel. The two sources of Agulhas inp...

  19. Percentual de recirculação sanguínea em diferentes formas de inserções de agulhas nas fístulas arterio-venosas, de pacientesem tratamento hemodialítico Percentage of blood recirculation in patients on hemodialysis in different models of insertion of needles in arteriovenous fistula

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    Ercia Missaio Koto dos Reis

    2001-03-01

    Full Text Available O objetivo deste estudo foi aferir a porcentagem de recirculação sangüínea (%R, nas diferentes formas de punções nas fístulas artério-venosa de pacientes em hemodiálise. Verificou-se o nível de uréia sangüínea em oito pacientes utilizando o modelo clássico de punção e de outros três grupos de oito pacientes com diferentes tipos de punção, simultânea e imediatamente após transcorridos 10 minutos de sessão, na linha arterial (A, linha venosa (V e membro contra-lateral ao acesso vascular (S, aplicando-se a fórmula %R = (S-A I (S-V . 100. Constatamos que na forma clássica de punção houve uma a porcentagem de recirculação significativamente menor.The aim of this study was to verify the percentage of recirculation (%R in patients on hemodialysis in different models of insertion of needles in arteriovenous fistula. Urea concentration was measured in samples of the arterial (A, venous line (V and blood from the apposite arm (S 10 minutes later in 8 patients using the classical model (apposite-oriented, ³ 5 cm apart needles as well as in patients with three other different models (8 patients in each group. The percentage of recirculation was calculated according to the formula %R= (S-A / (S-V.100 . A significant lower percentage of recirculation occurred in the use of the classical model.

  20. Estudo prospectivo e comparativo do escovado obtido pela CPER à ecoendoscopia associada à punção aspirativa com agulha fina (EE-PAAF no diagnóstico diferencial das estenoses biliares Prospective comparative study of ERCP brush cytology and EUS-FNA for the diferential diagnosis of biliary strictures

    Directory of Open Access Journals (Sweden)

    Monica Novis

    2010-06-01

    Full Text Available OBJETIVO: Avaliar o desempenho diagnóstico da citologia obtida pela CPER, aquele obtido pela EE-PAAF e a concordância entre patologistas gerais (PG e especialistas (PE em pacientes com estenose biliar. MÉTODOS: Incluímos pacientes com estenose biliar identificados pela CPER. A EE-PAAF foi realizada apenas em áreas com efeito de massa ou da parede espessada do ducto biliar. O padrão-ouro foi a cirurgia, histologia e/ou o seguimento. As amostras teciduais foram consideradas: malignas, suspeitas, atípicas, insuficientes ou benignas. Os espécimes obtidos por cada método foi interpretado (cego por um PG e outro PE. RESULTADO: 46 pacientes foram incluídos (37 malignos e 9 benignos. O diagnóstico final foi de tumor pancreático (26, biliar (11, pancreatite crônica (8 e estenose inflamatória do ducto biliar (1. Sensibilidade e acurácia da CPER foram 43,2% e 52,2% para o PG e 51,4% e 58,7% para o PE. Sensibilidade e acurácia da EE-PAAF foi 52,8% e 58,5% para o PG e 69,4% e 73,2% para o PE. A combinação entre a CPER e EE-PAAF demonstrou maior sensibilidade e acurácia para ambos PG (64,9% e 69,6% e PE (83,8% e 84,8%, respectivamente. CONCLUSÃO: A citologia obtida pelo escovado da via biliar durante a CPER e as amostras teciduais colhidas pela EE-PAAF tem rendimento semelhante para o diagnóstico das estenoses biliares. No entanto, a combinação dos métodos resulta em uma maior acurácia. Além disso, espera-se que a interpretação das amostras ocorra com maior precisão pelo PE se comparado ao PG.OBJECTIVE: To evaluate and to compare the diagnostic yield of ERCP brush cytology (ERCP and EUS-FNA in patients with biliary strictures and evaluates the agreement between general pathologists (GP and expert GI pathologists (GIP in the final diagnosis of biliary strictures. METHODS: Patients with biliary strictures documented by ERCP were included. Brush cytology was performed and during EUS, only visible mass lesions or localized bile duct wall thickening were aspirated. The gold standard method for diagnosis was surgical histology and/or follow-up. Tissue sampling results were: malignant, suspicious, atypical, insufficiently or benign. Specimens were interpreted by GP and GIP, blinded for prior tests results. RESULTS: 46 patients were included. Final diagnosis was malignancy in 37 (26 pancreatic - 11 biliary and benign in 9 (8 chronic pancreatitis - 1 common bile duct inflammatory stricture. Sensitivity and accuracy for ERCP brush cytology were 43.2% and 52.2% for GP and 51.4% and 58.7% for GIP. Sensitivity and accuracy for EUS-FNA were 52.8% and 58.5%, respectively for GP and 69.4% e 73.2% for GIP. In comparison, the combination of brush cytology and EUS-FNA demonstrated higher sensitivity and accuracy for both GP (64.9% and 69.6%, respectively and GIP (83.8% and 84.8%, respectively and improved agreement with final diagnosis for both (mostly for GIP. CONCLUSION: Both, ERCP brush cytology and EUS-FNA has a similar yield for the diagnosis of biliary strictures. However, the combination of these methods results in an improved diagnostic accuracy. In addition, GIP might be expected to interpret specimens with greater accuracy than GP.

  1. Percentual de recirculação sanguínea em diferentes formas de inserções de agulhas nas fístulas arterio-venosas, de pacientesem tratamento hemodialítico Percentage of blood recirculation in patients on hemodialysis in different models of insertion of needles in arteriovenous fistula

    OpenAIRE

    Ercia Missaio Koto dos Reis; Giudita Odoni Malvaso; Ana Emilia Pace Ferraz; Lídia Aparecida Rossi

    2001-01-01

    O objetivo deste estudo foi aferir a porcentagem de recirculação sangüínea (%R), nas diferentes formas de punções nas fístulas artério-venosa de pacientes em hemodiálise. Verificou-se o nível de uréia sangüínea em oito pacientes utilizando o modelo clássico de punção e de outros três grupos de oito pacientes com diferentes tipos de punção, simultânea e imediatamente após transcorridos 10 minutos de sessão, na linha arterial (A), linha venosa (V) e membro contra-lateral ao acesso vascular (S),...

  2. Modes of the southern extension of the East Madagascar Current

    OpenAIRE

    Siedler, Gerold; Rouault, Mathieu; Biastoch, Arne; Backeberg, B.; Reason, C.J.C.; Lutjeharms, J.R.E.

    2009-01-01

    Data sets from satellite observations and a nested high-resolution model are used to study a source region of the Agulhas Current. Altimeter-derived geostrophic surface currents are averaged over varying periods, providing evidence of the persistence of flow patterns in the extension of the southern branch of the East Madagascar Current (SEMC). South of Madagascar, the SEMC separates into one branch toward the Agulhas Current and into a second branch retroflecting and connecting to the Subtro...

  3. Modes of the southern extension of the East Madagascar Current

    OpenAIRE

    Siedler, G.; Rouault, M.; Biastoch, A.; Backeberg, Bjørn C.; Reason, Chris J. C.; Lutjeharms, J.R.E.

    2008-01-01

    Data sets from satellite observations and a nested high‐resolution model are used to study a source region of the Agulhas Current. Altimeter‐derived geostrophic surface currents are averaged over varying periods, providing evidence of the persistence of flow patterns in the extension of the southern branch of the East Madagascar Current (SEMC). South of Madagascar, the SEMC separates into one branch towards the Agulhas Current and into a second branch retroflecting and connecting to the Subtr...

  4. Cenozoic bottom current sedimentation in the Cape Basin, South Atlantic

    OpenAIRE

    Wildeboer Schut, E.; Uenzelmann-Neben, Gabriele

    2005-01-01

    The Cape Basin is located at a central location with respect to variouswater masses. The coldest and densest of these water masses is theLower Circumpolar Deep Water.The location and topography of the Agulhas Ridge effectively blocks itsnorthward flowing branches and deflects them into a south-westerndirection to follow the bathymetric contours of the Agulhas Ridge wheresuspended sediments accumulate in contourite drifts.Several hundred metres of sediments have accumulated since the onsetof A...

  5. Indian - Atlantic interocean exchange: variability and controls

    OpenAIRE

    Schouten, Mathijs Wilhelmus

    2003-01-01

    South of Africa, warm Indian Ocean water enters the Atlantic Ocean by means of large Agulhas Rings. These rings, with diameters up to 350 km and reaching all the way to the ocean floor at 5 km depth, form an important link in the global thermohaline circulation, which is the driving force behind the moderate temperatures over Northern Europe. For six years, the shedding of Agulhas rings has been monitored from space, using satellite altimeter measurements of the sea surface height. Rings can ...

  6. Study of the shear behaviour of fibre reinforced concrete beams

    Directory of Open Access Journals (Sweden)

    Barragán, B.

    2008-12-01

    Full Text Available This study presents a series of tests for characterizing the structural behaviour of fibre reinforced concrete beams subjected to shear loading. The experimental program involves three types of fibres; two steel fibres and a polypropylene fibre. As a reference, plain concrete and conventionally reinforced concrete specimens have also been tested. The ultimate shear capacity of the beams is calculated and these values compared with those predicted by existing formulations. The study confirms that the toughness and shear crack resistance of the material is greatly enhanced by the fibres. However, the incorporation of 1% of fibres yielded lower shear strength than conventionally reinforced beams with the same amount of steel in the form of transversal stirrups. Existing design methods seem sufficiently robust to estimate the maximum shear load, even when using material properties (toughness, tensile strength extrapolated from code formulae.Este trabajo presenta una serie de ensayos para caracterizar el comportamiento estructural de vigas realizadas con hormigón reforzado con fibras sometidas a cortante. El programa de ensayos incluía tres tipos de fibras, dos de acero y una de polipropileno. Asimismo, se realizó una serie de ensayos con una viga confeccionada con hormigón armado convencional. La resistencia a cortante de las vigas es comparada con los valores que la formulación existente predice. El estudio confirma que la tenacidad y la resistencia a cortante son incrementadas tras la adición de fibras al hormigón. Sin embargo, la incorporación de un 1% en volumen de fibras conduce a valores de resistencia última a cortante inferiores a los obtenidos con vigas de hormigón convencional con la misma cantidad de acero dispuesta en forma de cercos de cortante. Los actuales métodos de cálculo parecen lo suficientemente precisos para evaluar la carga de cortante último, incluso cuando los parámetros mecánicos utilizados en las f

  7. Avulsion fracture of the anterior inferior iliac spine with abundant reactive ossification in the soft tissue.

    Science.gov (United States)

    Resnick, J M; Carrasco, C H; Edeiken, J; Yasko, A W; Ro, J Y; Ayala, A G

    1996-08-01

    Patients who have sustained an avulsion fracture and present clinically during the healing phase of the injury may manifest a mass that clinically and radiographically mimics a malignant neoplasm. A 15-year-old male soccer goalkeeper presented with a large ossified mass in the soft tissues overlying the right hip 6 months after experiencing a popping sensation in his hip joint during a game. Although an osteosarcoma was suspected clinically and radiographically, a Tru-Cut needle biopsy of the lesion revealed reactive bone formation. Correlation of the clinical, radiographic, and pathologic findings indicated an avulsion fracture of the anterior inferior iliac spine with abundant reactive ossification in the soft tissues. The healing phase of an avulsion fracture may clinically and radiographically be mistaken for neoplasia. In such cases, a Tru-Cut needle biopsy may reveal the reactive nature of the process. PMID:8865496

  8. Estrogen and progesterone hormone receptor status in breast carcinoma: Comparison of immunocytochemistry and immunohistochemistry

    OpenAIRE

    K Radhika; A K Prayaga

    2010-01-01

    Context : Estrogen receptors (ER) and progesterone receptors (PR) play a significant role in the prognosis of breast cancer. For preoperative chemotherapy in locally advanced lesions, trucut biopsy is used to localize the ER and PR receptors by immunohistochemistry. Immunocytochemistry can be a better alternative to immunohistochemistry as it better fixes cells. AIMS : To evaluate the degree of correlation between immunocytochemical (ICC) and immunohistochemical (IHC) determination of ER an...

  9. Clinical course of a malignant peripheral nerve sheath tumor in a Siberian tiger (Panthera tigris altaica)

    OpenAIRE

    Steinmetz, H W; Rütten, M; Ruess-Melzer, K; Ohlerth, S; Lischer, C J; Oevermann, A; Bode-Lesniewska, B; Hatt, J M

    2010-01-01

    A 14-year-old male Siberian tiger (Panthera tigris altaica) was admitted with an ulcerating mass on the right thoracic wall. Radiographic and computed tomographic evaluation indicated 2 isolated cutaneous masses without any signs of metastasis. Histology of a Tru-Cut biopsy revealed an anaplastic sarcoma with giant cells. Both tumors were resected with appropriate normal tissue margins. The size of the defect did not allow primary closure of the wound; therefore, a mesh expansion technique wa...

  10. Giant germ cell tumor with mediastinal localization: A report of two cases

    Directory of Open Access Journals (Sweden)

    Fatih Meteroğlu

    2010-06-01

    Full Text Available Germ celled tumors frequently localize in anterior mediastinum.In this study we presented two germ cell tumors with different localization and huge size. We discussed two cases with germ cell tumors operated in our clinic togetherwith literature findings. Chest x-ray, computerized tomography (CT and transthorasic tru-cut biopsy were used for diagnosis. The huge intratorasic teratomas are rarely seen and surgical full resection is the most importantfactor in survival.

  11. AGR2 Predicts Tamoxifen Resistance in Postmenopausal Breast Cancer Patients

    OpenAIRE

    Roman Hrstka; Veronika Brychtova; Pavel Fabian; Borivoj Vojtesek; Marek Svoboda

    2013-01-01

    Endocrine resistance is a significant problem in breast cancer treatment. Thus identification and validation of novel resistance determinants is important to improve treatment efficacy and patient outcome. In our work, AGR2 expression was determined by qRT-PCR in Tru-Cut needle biopsies from tamoxifen-treated postmenopausal breast cancer patients. Our results showed inversed association of AGR2 mRNA levels with primary treatment response (P = 0.0011) and progression-free survival (P = 0.0366)...

  12. Basics of kidney biopsy: A nephrologist's perspective

    OpenAIRE

    Agarwal, S. K.; Sethi, S; A K Dinda

    2013-01-01

    The introduction of the kidney biopsy is one of the major events in the history of nephrology. Primary indications of kidney biopsy are glomerular hematuria/proteinuria with or without renal dysfunction and unexplained renal failure. Kidney biopsy is usually performed in prone position but in certain situations, supine and lateral positions may be required. Biopsy needles have changed with times from Vim–Silverman needle to Tru-cut needle to spring-loaded automatic gun. The procedure has also...

  13. Variación de la capacidad portante de suelos granulares contaminados con hidrocarburos

    OpenAIRE

    Fernandez Serrano, Roberto; Martínez Santamaría, José Manuel; Rogel Quesada, Juan Manuel

    2012-01-01

    El trabajo presenta una investigación sobre la variación de las propiedades geotécnicas básicas de una Arena de Miga (de Madrid) contaminada con hidrocarburos ligeros. Se deducen las siguientes conclusiones: (1) comportamiento particular frente a la compactación; (2) Disminución de la resistencia cortante drenada y (3) Variación de la capacidad portante de los suelos contaminados.

  14. STABILITY AND MINIMUM LATERAL BRACING FOR STEPPED COLUMNS WITH SEMI-RIGID CONNECTIONS INCLUDING SHEAR EFFECTS: II VERIFICATION AND EXAMPLES

    Directory of Open Access Journals (Sweden)

    J. DARIO ARISTIZABAL-OCHOA

    2012-01-01

    Full Text Available El análisis de estabilidad elástica de columnas con un cambio de sección con derivas laterales totalmente inhibidas, parcialmente inhibidas, y desinhibidas sometidas a cargas axiales concentradas en los extremos y en el nudo intermedio incluyendo los efectos de las conexiones y de las fuerzas a cortante utilizando tres modelos diferentes es presentado y discutido en una publicación adjunta. Los dos primeros modelos son de Engesser y de Haringx que incluyen la componente de la fuerza axial aplicada a cortante proporcional a la pendiente total (dy/dx y al ángulo de giro de la sección transversal ( a lo largo del miembro, respectivamente. El tercer modelo es una formulación simplificada basada en la teoría clásica de Euler, que incluye los efectos de las deformaciones por cortante, pero desprecia la componente a cortante de la fuerza axial aplicada a lo largo de la columna. Se presenta también criterios definidos para determinar la rigidez mínima de los arriostramientos laterales para columnas con un cambio de sección. Se incluye cinco ejemplos completos en esta publicación que muestran la efectividad de las ecuaciones de métodos propuesto en el análisis de estabilidad y en el cálculo de los arriostramientos mínimos para columnas con un cambio de sección.

  15. Característica, almacenamiento de una matriz de rigidez y comparación de métodos del gradiente conjugado y de cholesky

    OpenAIRE

    Mora E., Hector M.

    2012-01-01

    El cálculo de los esfuerzos (momento y cortante) en un pórtico plano (el esqueleto de un edificio) por el método de la rigidez se hace a partir de los desplazamientos resultantes de la aplicación de las cargas. El valor de los desplazamientos se obtiene resolviendo el sistema de ecuaciones Ax = b donde A es la matriz de rigidez. Usualmente se utiliza el método de Cholesky

  16. Shear strength of match cast dry joints of precast concrete segmental bridges: proposal for Eurocode 2

    Directory of Open Access Journals (Sweden)

    Aparicio, J. A.

    2006-06-01

    Full Text Available This paper discusses a study on the performance of concretesegmental bridges with shear keys, focusing on theshear behaviour of castellated dry joints under ultimatelimit state conditions. The widely varying formulationused to evaluate joint shear strength were compiled,along with the experimental results published in the literatureon the subject. The various approaches were evaluatedby comparing their predictions of ultimate jointstrength to published empirical findings. The formulagiving the best prediction was adapted to the safety factorprovisions set out in Eurocode 2.Este trabajo presenta un estudio sobre el comportamientode puentes de dovelas de hormigon con llaves de cortante,centrado en el comportamiento a cortante de lasjuntas secas conjugadas en Estado Limite Ultimo. Se harealizado una exhaustiva recopilacion de la dispar formulacionexistente para evaluar la resistencia a cortante delas juntas. Se ha realizado, asimismo, una investigacionbibliografica de los resultados experimentales disponiblessobre este particular en la literatura. Los resultados recogidosen la bibliografia han sido comparados con la variadaformulacion existente para predecir la resistencia ultimade las juntas. La formula que mejor predice laresistencia ha sido identificada. Esta ha sido adaptada alformato de seguridad presente en el Eurocodigo 2.

  17. Shear Strengthening of Corbels with Carbon Fibre Reinforced Polymers (CFRP

    Directory of Open Access Journals (Sweden)

    Nawaz, A.

    2010-09-01

    Full Text Available Corbels constitute what are known as “disturbed” regions in concrete structures, where typical shear failure may be anticipated on the grounds of small shear span-to-depth ratios. The concentration of stress induced by the weight of girders on the very small loadbearing areas in corbels often causes cracking in bridges and other structures. Little experimental research can be found in the literature on the shear strengthening of corbels. In the present study, nine such members were tested. Two had no carbon fibre reinforced polymers attached, while CFRP laminates were externally bonded to the other seven, in a number of different spatial arrangements. Ultimate shear strength was found and compared for all specimens. The results showed that CFRP configuration and geometry directly affected corbel shear strength, which was higher in all the CFRPstrengthened corbels than in the controls. The highest strength values were recorded for specimens whose shear-critical area was wrapped in CFRP.

    Las ménsulas constituyen lo que conocemos como regiones de “distorsión” en las estructuras de hormigón, zonas en que pueden preverse roturas por cortante debido a las bajas relaciones luz de cortante-canto presentes en ellas. La concentración de solicitaciones producida por el peso de las vigas sobre superficies de carga muy reducidas en las ménsulas a menudo provoca el agrietamiento de puentes y otras estructuras de obra civil. En la literatura especializada sobre el refuerzo a cortante de las ménsulas existen escasos ejemplos de estudios experimentales. Para la presente investigación se han realizado ensayos con nueve elementos de este tipo. Dos de ellos no incluían polímeros reforzados con fibra de carbono (CFRP, mientras que los siete restantes llevaban láminas externas de CFRP, dispuestas siguiendo distintas configuraciones espaciales. Los resultados indican que la configuración y la disposición geométrica de los CFRP repercuten

  18. Advocacy and coverage of needle exchange programs: results of a comparative study of harm reduction programs in Brazil, Bangladesh, Belarus, Ukraine, Russian Federation, and China Advocacy e cobertura de projetos de troca de agulhas: resultados de um estudo comparativo sobre programas de redução de danos no Brasil, Bangladesh, Belarus, Ucrânia, Federação Russa e China

    Directory of Open Access Journals (Sweden)

    Dave Burrows

    2006-04-01

    Full Text Available To prevent or mitigate an AIDS epidemic among injecting drug users (IDUs, effective activities need to be implemented on a large enough scale to reach and assist sufficient numbers of drug users and thereby change their risk behaviors related to drug use and sex. Recent work by UNAIDS on "high coverage sites", adopting the above strategies, has shown that one of the key elements in achieving high coverage is ongoing and sophisticated advocacy. High coverage harm reduction sites were studied through literature search and site visits, including key informant interviews, review of service statistics, and data analysis, in order to document the steps that led to scaling up, the way coverage was defined in these sites, and the lessons learned from their efforts. Syringe-exchange programs can achieve high coverage of IDUs. Monitoring to determine regular reach (those who are in regular contact with harm reduction services should be added to uniform data collection carried out by harm reduction programs. Advocacy is crucial to achieving high coverage.Para prevenir ou mitigar uma epidemia de AIDS entre usuários de drogas injetáveis (UDI, atividades eficazes devem ser implementadas numa escala suficiente para atingir e ajudar um número suficiente de usuários e, portanto, modificar seus comportamentos de risco em relação ao uso de drogas e práticas sexuais. Um estudo recente do UNAIDS sobre "locais de cobertura alta", ao adotar as estratégias propostas acima, demonstrou que um dos elementos centrais para atingir uma cobertura alta é a advocacy permanente e bem-elaborada. Locais de redução de danos que apresentavam altas taxas de cobertura foram estudados através de uma revisão bibliográfica e visitas aos locais de maior cobertura, incluindo entrevistas com informantes principais, revisão de dados estatísticos dos serviços e análise de dados para poder documentar os passos que levaram à ampliação do alcance dos projetos, à definição da cobertura dos programas e às lições aprendidas. Os programas de redução de danos podem alcançar uma ampla cobertura de UDI. Além da coleta de dados rotineiros, os programas devem monitorar os projetos para definir o alcance sistemático (ou seja, dos UDI que estão em contato permanente com os serviços de redução de danos. A advocacy é fundamental para alcançar taxas de cobertura altas.

  19. ANALISIS DE PRIMER y SEGUNDO-ORDEN Y ESTABILIDAD DE PÓRTICOS CON CONEXIONES SEMIRRÍGIDAS: MÉTODO DE HARDY CROSS (I-TEORIA

    Directory of Open Access Journals (Sweden)

    J. DARIO ARISTIZABAL-OCHOA

    2011-01-01

    Full Text Available A pesar de que el método de distribución de momentos (DM desarrollado por Hardy Cross en 1932 ha sido superado por métodos de cálculo más poderosos como el método de Elementos Finitos este es parte importante de los cursos de análisis y diseño estructural y todavía una herramienta utilizada en la práctica profesional por los ingenieros estructurales. El objetivo principal de esta publicación es presentar una versión extendida del MDM para la estabilidad lateral, el análisis de primer y de segundo-orden de vigas indeterminadas y estructuras aporticadas hechas de vigas y columnas de sección transversal simétrica. Los efectos combinados de las deformaciones por fl exión y por cortante, cargas axiales y conexiones semirrígidas son incluidos utilizando la formulación "modifi cada" de la cortante propuesta por Haringx en 1947 y descrita por Timoshenko y Gere (1961. El método propuesto, el cual incluye los efectos de la componente inducida por la fuerza axial aplicada en la cortante a la lo largo de cada elemento, tiene las siguientes ventajas: 1 puede ser utilizado en el análisis de primer y segundo orden y estabilidad lateral de estructuras aporticadas indeterminadas hechas de vigas y columnas con conexiones rígidas, semirrígidas y simples; 2 los efectos de las conexiones son condensados en los coefi cientes de rigidez a fl exión y en los momentos fi jos sin introducir grados de libertad ni ecuaciones de equilibrio adicionales; y 3 el método es exacto, poderoso, práctico, versátil y es una herramienta excelente de enseñanza. Estudios analíticos indican que los efectos de la cortante, de las conexiones semirrígidas y de la carga axial incrementan las defl exiones laterales y afectan los momentos internos y las reacciones en estructuras aporticadas. Estos efectos deben tenerse en cuenta particularmente en estructuras esbeltas y cuando son hechas de vigas o columnas con área a cortante relativamente pequeña (en celos

  20. Coherent water transport across the South Atlantic

    CERN Document Server

    Wang, Y; Beron-Vera, F J

    2015-01-01

    The role of mesoscale eddies in transporting Agulhas leakage is investigated using a recent technique from nonlinear dynamical systems theory applied on geostrophic currents inferred from the over two-decade-long satellite altimetry record. Eddies are found to acquire material coherence away from the Agulhas retroflection, near the Walvis Ridge in the South Atlantic. Yearly, 1 to 4 coherent material eddies are detected with diameters ranging from 40 to 280 km. A total of 23 eddy cores of about 50 km in diameter and with at least 30% of their contents traceable into the Indian Ocean were found to travel across the subtropical gyre with minor filamentation. No more than 5\\% of such cores pour their contents on the North Brazil Current. While ability of eddies to carry Agulhas leakage northwestward across the South Atlantic is supported by our analysis, this is more restricted than suggested by earlier ring transport assessments.

  1. A reinserção do estilete não afeta a incidência de cefaleia pós-punção dural (CPPD) após raquianestesia La reinserción del estilete no afecta la incidencia de cefalea pos punción dural (CPPD) posteriormente a la raquianestesia Reinsertion of the stylet does not affect incidence of post dural puncture headaches (PDPH) after spinal anesthesia

    OpenAIRE

    Nadir S. Sinikoglu; Hacer Yeter; Funda Gumus; Enver Belli; Aysin Alagol; Nesrin Turan

    2013-01-01

    JUSTIFICATIVA E OBJETIVOS: Este estudo foi conduzido para investigar os efeitos da reinserção do estilete em cefaleia pós-punção dural (CPPD) após raquianestesia. MÉTODOS: Foram selecionados para este estudo 630 pacientes submetidos a cirurgia eletiva com raquianestesia. Os pacientes foram randomicamente designados para dois grupos: Grupo A (reinserção do estilete antes da retirada da agulha) e Grupo B (retirada da agulha sem reinserção do estilete). Os pacientes foram observados durante 24 h...

  2. Modulación en la expresión de biomarcadores (RE, RP y C-erbB2 en cáncer de mama tras tratamiento neoadyuvante Modulation of biomarkers expression (OR, PR and C-erbB2 in breast cancer following neoadjuvant treatment

    Directory of Open Access Journals (Sweden)

    A. Córdoba

    2006-12-01

    Full Text Available Introducción: El tratamiento oncológico pre y postoperatorio en pacientes con carcinoma de mama está condicionado entre otros factores, por el resultado del estudio inmunohistoquímico de los receptores hormonales y por la expresión de c-erbB2. El objetivo del estudio es determinar la influencia del tratamiento neoadyuvante en la expresión de receptores de estrógeno (RE, progesterona (PR y c-erbB2. Material y métodos. Estudiamos 53 pacientes con cáncer de mama diagnosticadas mediante biopsia "trucut". Las pacientes con carcinoma localmente avanzado (20 se someten a quimioterapia preoperatoria. Se realiza extirpación quirúrgica en todos los casos. Comparamos la expresión de receptores de estrógeno (RE, receptores de progesterona (PR y c-erbB2, en la biopsia"trucut" y en la pieza quirúrgica. Resultados. Encontramos diferencias significativas en la expresión de RE, RP entre biopsia/pieza quirúrgica, comparando el grupo de pacientes sometidas a tratamiento neoadyuvante frente al grupo de pacientes sin tratamiento oncológico prequirúrgico. Encontramos diferencias de signo (positivización y negativización entre un 10 y un 40% de casos en la expresión inmunohistoquímica para RE, RP y c-erbB2 entre la biopsia"trucut" y la resección quirúrgica en las pacientes tratadas con neoadyuvancia. Estas diferencias de signo no tienen significación estadística.Introducción: Pre and post-operative oncological therapy in patients with breast cancer is determined, amongst other factors, by hormone receptor status and by c-erbB2 expression. The aim of this study is to determine the influence of neoadjuvant therapy on the expression of oestrogen receptor (OR, progesterone receptor (PR and c-erbB2. Methods. Fifty-three patients with breast cancer diagnosed by tru-cut biopsy were studied. Patients with locally advanced carcinoma (20 had preoperative treatment. All patients underwent surgical resection. Expression of OR, PR and c-erbB2 in both the

  3. Extremity localized intramuscular hemangiomas, follow up or surgery?

    OpenAIRE

    Atalay, İsmail Burak; KARAKOÇ, Yaman; Yılmaz, Selçuk; Arıkan, Murat; Özanlağan, Emre

    2015-01-01

    INTRODUCTION: In this study, we evaluated the retrospective analysis of 44 patients with the diagnosis of extremity located intramuscular hemangiomasMETHODS: Twenty five of the patients were female, and nineteen male. Twenty two of the hemagiomas were in thigh,8 were in cruris, 6 were in forearm,4 in elbow,2 in arm,one in shoulder, one in popliteal area. Ten patients who had malignancy potential, were maken tru-cut biyopsy. The other patients were diagnosed with clinical and radiological sign...

  4. Extramedullary paraspinal hematopoiesis in hereditary spherocytosis

    Directory of Open Access Journals (Sweden)

    Gogia P

    2008-01-01

    Full Text Available Hereditary spherocytosis (HS is a common inherited hemolytic anemia due to red cell membrane defects. Extramedullary hematopoiesis is a compensatory response to insufficient bone marrow blood cell production. The preferred sites of extramedullary hematopoietic involvement are the spleen, liver and lymph nodes; but in HS, the posterior paravertebral mediastinum is also commonly involved. We report a case of a 50-year-old male who presented to us in respiratory distress and with bilateral paravertebral posterior mediastinal masses, which on trucut biopsy were found to be extra-hematopoietic masses; and the patient was found to have hereditary spherocytosis.

  5. Plugging the biopsy tract in rabbit liver : gelfoam, fibrin sealant and NBCA

    International Nuclear Information System (INIS)

    To evaluate the effect of plugging the biopsy tract in rabbit liver and the pathologic changes caused by plugging materials. Thirty-two New Zealand White rabbits were divided into four groups (eight rabbits in each) and compared with one another. They were labeled group A (control), B (gelfoam), C (fibrin sealant) or D (NBCA). the liver was exposed and biopsied with an 18G disposable biopsy gun. The inner Tru-cut needle was withdrawn and plugging was undertaken through the outer cannula of the biopsy gun. Bleeding times of each material were compared. The rabbits were sacrificed and pathologically evaluated for 17 days

  6. Assessment of pancreatic neoplasms: review of biopsy techniques.

    Science.gov (United States)

    Goldin, Steven B; Bradner, Michael W; Zervos, Emmanuel E; Rosemurgy, Alexander S

    2007-06-01

    Pancreatic cancer is the 4th leading cause of cancer death annually. Recent technological advances in imaging have led to non-uniformity in the evaluation of pancreatic neoplasms. The following article describes the history behind various biopsy techniques and the rationale for obtaining a biopsy of a pancreatic neoplasm and discusses the benefits and disadvantages of the various pancreatic biopsy techniques, including fine needle aspiration biopsy, Tru-cut needle biopsy, endoscopic brushings/cytology, and endoscopic ultrasound guided biopsies. A treatment algorithm for pancreatic neoplasms is then presented. PMID:17562121

  7. Vigas tipo I para la construcción civil fabricadas con madera de plantaciones de rápido crecimiento en Costa Rica

    Directory of Open Access Journals (Sweden)

    Carolina Tenorio

    2014-03-01

    Full Text Available En años recientes, el mercado de la madera en Costa Rica ha sido abastecido por especies de plantaciones forestales de rápido crecimiento. No obstante, aún se presentan vacíos en el diseño y comercialización de productos de alto desarrollo tecnológico. Con el propósito de introducir las maderas de plantación en el mercado, se estableció como objetivo determinar los esfuerzos de diseño (esfuerzo en flexión, cortante y la rigidez a flexión de vigas tipo I construidas con madera de Gmelina arborea, utilizando madera sólida en las zapatas y plywood de 12 mm en el alma. Se desarrollaron tres tipos de perfiles (24, 16 y 10 cm de alto y dos tipos de calidades (A y B. Los resultados mostraron que los esfuerzos de diseño variaron de 60 a 147 kg/cm2 en el esfuerzo en flexión y de 42 a 92 kg/ cm2 en el esfuerzo en cortante. Las vigas de 10 cm y de calidad A presentaron los esfuerzos más altos en flexión y cortante, seguidos por las vigas de 24 cm y 16 cm. Con respecto a la rigidez a flexión, las vigas perfil 24 son las que poseen el valor más alto, con 302787437,1 kg-cm2; seguidas de los perfiles 16 y 10. Al demostrar el uso de las vigas en entrepisos, se observó que las vigas de calidad A son las que producen las longitudes óptimas para el mercado. Para techos, la clasificación por calidad de las vigas no produce efectos en la longitud permisible.

  8. Brechas en bordos de arcilla formadas por desbordamiento

    OpenAIRE

    Orozco Rivas, Ricardo; Berezowsky, Moisés

    2000-01-01

    Se describe un método para calcular el mecanismo de formación de una brecha en un bordo o dique de tierra como consecuencia de su falla por desbordamiento. La brecha se va formando conforme el flujo erosiona el bordo; este proceso, sumamente complejo, se incluye en el modelo numérico que aquí se describe mediante una relación empírica entre el esfuerzo cortante actuante y la tasa de erosión en un suelo cohesivo. Con la metodología propuesta se obtiene simultáneamente el hidrograma que sale po...

  9. Identificación de melocotones lanosos mediante técnicas no destructivas de impacto y espectroscopía en el infrarrojo cercano

    OpenAIRE

    Ortiz, Christopher; Barreiro Elorza, Pilar; Correa Hernando, Eva Cristina; Ruiz-Altisent, Margarita; Riquelme Ballesteros, F.

    1999-01-01

    270 melocotones de la variedad Maycrest pertenecientes a 3 estados de madurez en recolección y almacenados 0, 1, 2, 3 y 4 semanas a 1°C y 5 °C, fueron ensayados mediante técnicas no destructivas (impacto no destructivo y espectroscopia en el infrarrojo cercano) con la finalidad de estimar la lanosidad (harinosidad en melocotón). Como referencia del grado de lanosidad de cada fruto se empleó procedimientos mecánicos destructivos (Magness-Taylor, compresión confinada y esfuerzo cortante). Los d...

  10. Evaluación de la resolución del método de análisis de dispersión de ondas superficiales MASW (Multichannel Analysis of Surface Waves) en suelos residuales.

    OpenAIRE

    Serna Vásquez, Andrés Felipe

    2016-01-01

    Resumen: Tomando como punto de partida los procedimientos técnicos presentados en la literatura para la ejecución de los ensayos geofísicos tipo MASW (Análisis Multicanal de Ondas Superficiales), los cuales fueron desarrollados para obtener un alto grado de asertividad en la determinación de la velocidad de onda cortante y el espesor de cada geomaterial que conforma el perfil estratigráfico en ambientes litológicos sedimentarios, se propone realizar una evaluación de dichas metodologías en tr...

  11. Estudio de las mezclas bituminosas recicladas en frío con emulsión con el compactador giratorio Superpave

    OpenAIRE

    Nosetti, Rodolfo Adrián; Pérez Jiménez, Félix Edmundo; Martínez Reguero, Adriana Haydée

    2010-01-01

    En el presente trabajo se describen los estudios realizados con el compactador giratorio Superpave con mezclas bituminosas recicladas en frio con emulsión. Este compactador registra la evolución de la densidad y el esfuerzo cortante durante el proceso de compactación. Los valores de presión vertical y ángulo de incidencia del compactador giratorio ya están definidos en algunos países o administraciones de carreteras para el diseño de las mezclas bituminosas en caliente, pero hasta el mo...

  12. Uso de los antisépticos en atención primaria

    OpenAIRE

    M. Isabel Gutiérrez Pérez; M. Eulalia Lucio-Villegas Menéndez; Laura López González; Natalia Aresté Lluch; M. Luisa Morató Agustí; Santiago Pérez Cachafeiro

    2014-01-01

    Las heridas se pueden clasificar, según el mecanismo de acción, en quirúrgicas o traumáticas (que pueden ser incisas, como las provocadas por un objeto cortante; contusas, causadas por un objeto romo; punzantes, provocadas por objetos afilados y largos; por desgarro, causadas por tracción de los tejidos; por mordedura, que tienen alto riesgo de infección, por lo que no se deben suturar) o, por la evolución del proceso de cicatrización, en agudas o crónicas (úlceras por presión, úlceras vascul...

  13. Dimensionamiento experimental de pilares en la minería subterránea de oro en Colombia

    OpenAIRE

    Castro Caicedo, Alvaro Jesus; España, Ximena; Bustos, Yordy

    2010-01-01

    Aquí se presenta el procedimiento y los resultados obtenidos para dimensionar los pilares rocosos de explotaciones subterráneas de vetas auríferas situadas en los Distritos Mineros de Segovia-Remedios en el Departamento de Antioquia, y de La Llanada, en el Departamento de Nariño. Se utilizó la resistencia al esfuerzo cortante y a compresión proveniente de ensayos de laboratorio y levantamientos geotécnicos. Se encontraron mecanismos de ruptura de pilares y se proponen ábacos de diseño rela...

  14. Deformation analysis of concrete walls under shaking table excitations

    OpenAIRE

    JULIAN CARRILLO; Alcocer, Sergio M.; GIOVANNI GONZÁLEZ

    2012-01-01

    El análisis de deformación de elementos estructurales es una herramienta indispensable para investigar la relación fuerza lateral versus deformaciones de cortante, deslizamiento y flexión; evaluar el mecanismo de resistencia del modo de falla, asignar valores adecuados de rigidez lateral, estimar la contribución del acero de refuerzo a las capacidades de resistencia y desplazamiento, calibrar modelos analíticos y, para proponer parámetros apropiados para diseño sísmico basado en desempeño. Pa...

  15. Estudio numérico y experimental del efecto de tamaño en modo mixto de los paneles de yeso laminado y lana de roca

    OpenAIRE

    Alonso Vera, Juan Antonio; Reyes Pozo, Encarnación; Gálvez Ruíz, Jaime

    2012-01-01

    Los paneles sándwich de yeso laminado y lana de roca presentan una abundante patología de fisuración debida a flechas excesivas de forjados. Existe, por tanto, la necesidad de avanzar en la simulación y predicción de comportamiento bajo solicitaciones de tracción y cortante de ese tipo de paneles, a pesar de que en las aplicaciones habituales no tienen responsabilidad estructural. El comportamiento de este material puede ser considerado cuasi-frágil, y en base a ello en este trabajo ha sido e...

  16. Refuerzo de estructuras de hormigón armado con laminados de fibra de carbono (CFRP)

    OpenAIRE

    Oller Ibars, Eva; Marí Bernat, Antonio Ricardo; Bairán García, Jesús Miguel

    2011-01-01

    El uso de los materiales compuestos en el campo del refuerzo estructural ha experimentado un notable crecimiento en los últimos años gracias a sus elevadas relaciones resistencia/peso y rigidez/peso, que permiten reducir costes de mano de obra respecto al empleo de otros materiales más convencionales. Los polímeros reforzados con fibras (FRP) se pueden aplicar como refuerzo de estructuras de hormigón armado o pretensado a flexión, cortante o confinamiento. Independientemente de...

  17. Estudo epidemiológico das lesões traumáticas de plexo braquial em adultos

    OpenAIRE

    Flores Leandro Pretto

    2006-01-01

    OBJETIVO: Determinar informações epidemiológicas sobre as variáveis relacionadas ao trauma de plexo braquial em adultos. MÉTODO: Foram analisados 35 pacientes, de maneira prospectiva, atendidos consecutivamente no período de um ano. RESULTADOS: A maioria das lesões apresentou localização supraclavicular (62%), sendo 21 lesões por mecanismo de tração (60%), nove por projétil de arma de fogo (25%), três por compressão (8,5%) e dois ferimentos cortantes (5,7%). Acidentes motociclísticos responde...

  18. Estudo epidemiológico das lesões traumáticas de plexo braquial em adultos Epidemiological study of the traumatic brachial plexus injuries in adults

    OpenAIRE

    Leandro Pretto Flores

    2006-01-01

    OBJETIVO: Determinar informações epidemiológicas sobre as variáveis relacionadas ao trauma de plexo braquial em adultos. MÉTODO: Foram analisados 35 pacientes, de maneira prospectiva, atendidos consecutivamente no período de um ano. RESULTADOS: A maioria das lesões apresentou localização supraclavicular (62%), sendo 21 lesões por mecanismo de tração (60%), nove por projétil de arma de fogo (25%), três por compressão (8,5%) e dois ferimentos cortantes (5,7%). Acidentes motociclísticos responde...

  19. Exposição ocupacional a material biológico em medicina dentária

    OpenAIRE

    Afonso, Diogo Manuel Guerra

    2015-01-01

    Dissertação para obtenção do grau de Mestre no Instituto Superior de Ciências da Saúde Egas Moniz Os profissionais médicos dentários estão susceptíveis a um elevado risco de exposição ocupacional a material biológico uma vez que estes trabalham com diversos instrumentos perfuro-cortantes num local em constante movimento e dimensionalmente limitado que é a cavidade oral. É essencial ter consciência que, associado a essas exposições, pode o material biológico estar potencialmente contamin...

  20. Ampolas de vidro: riscos e benefícios

    OpenAIRE

    Antônio Roberto Carraretto; Erick Freitas Curi; Carlos Eduardo David de Almeida; Roberta Eleni Monteiro Abatti

    2011-01-01

    JUSTIFICATIVAS E OBJETIVOS: Ampolas de vidro têm sido amplamente utilizadas no acondicionamento de fármacos. O vidro apresenta importantes características que lhe conferem o uso amplo na fabricação de recipientes para o acondicionamento de fármacos e outras substâncias estéreis. No entanto, a contaminação das soluções com micropartículas de vidro durante a abertura, a presença de metais, acidentes pérfuro-cortantes e contaminações biológicas justificam a necessidade de materiais educativos qu...

  1. Salud laboral en artesanos de microempresas en un municipio mexicano: una investigación-acción participativa

    OpenAIRE

    Anaya Velasco, Ana; Universidad de Guadalajara; Aranda Beltrán, Carolina; Universidad de Guadalajara; Torres López, Teresa Margarita; Universidad de Guadalajara

    2013-01-01

    El presente trabajo describe una investigación-acción participativa para conocer las condiciones de salud y la evolución de grupo en diez microempresas en un municipio mexicano. Para evaluar las primeras se utilizó el Cuestionario de Grupo Homogéneo, extraído del modelo obrero italiano original, y para la segunda un listado de momentos de integración de grupos operativos e indicadores. Se identificaron condiciones peligrosas, tales como ruido, polvo, exposición a instrumentos cortantes y exig...

  2. Spawning patterns of shallow-water hake (Merluccius capensis) and deep-water hake (M. paradoxus) in the Benguela Current Large Marine Ecosystem inferred from gonadosomatic indices

    DEFF Research Database (Denmark)

    Jansen, Teunis; Kainge, Paulus Inekela; Singh, Larvika;

    2015-01-01

    the western Agulhas bank in the southern Benguela, spawning peaks were observed in both summer and winter. These peaks largely coincided with peaks in phytoplankton production that are linked to upwelling conditions in the region. Hake condition decreased subsequent to the development of the gonads...

  3. Comparison between three implementations of automatic identification algorithms for the quantification and characterization of mesoscale eddies in the South Atlantic Ocean

    Directory of Open Access Journals (Sweden)

    J. M. A. C. Souza

    2011-03-01

    Full Text Available Three methods for automatic detection of mesoscale coherent structures are applied to Sea Level Anomaly (SLA fields in the South Atlantic. The first method is based on the wavelet packet decomposition of the SLA data, the second on the estimation of the Okubo-Weiss parameter and the third on a geometric criterion using the winding-angle approach. The results provide a comprehensive picture of the mesoscale eddies over the South Atlantic Ocean, emphasizing their main characteristics: amplitude, diameter, duration and propagation velocity. Five areas of particular eddy dynamics were selected: the Brazil Current, the Agulhas eddies propagation corridor, the Agulhas Current retroflexion, the Brazil-Malvinas confluence zone and the northern branch of the Antarctic Circumpolar Current (ACC. For these areas, mean propagation velocities and amplitudes were calculated. Two regions with long duration eddies were observed, corresponding to the propagation of Agulhas and ACC eddies. Through the comparison between the identification methods, their main advantages and shortcomings were detailed. The geometric criterion presents a better performance, mainly in terms of number of detections, duration of the eddies and propagation velocities. The results are particularly good for the Agulhas Rings, that presented the longest lifetimes of all South Atlantic eddies.

  4. First record of larvae of Arnoglossus imperialis (Rafinesque, 1810) (Bothidae, Pieces) Atlantic species from the Indian Ocean

    Digital Repository Service at National Institute of Oceanography (India)

    Devi, C.B.L.; Stephen, R.

    Larvae ranging from 7.7 mm NL to 12.2 mm SL were found in zooplankton from the Agulhas Bank. The long leaf-like larval body, the presence of spiny discoid scutes distributed along the bases of median fin rays, cleithra urohyal, posterior...

  5. A visible record of eddies in the southern Mozambique Channel

    OpenAIRE

    Quartly, Graham D.; Srokosz, Meric A.

    2003-01-01

    The flows around Madagascar feed into the Agulhas Current, but there have been few hydrographic studies of the flow within the Mozambique Channel. Some cruise and altimetric data point to this being a region of high mesoscale activity, with eddies migrating through the area. Here we show how ocean colour data throw light on the behaviour of eddies in the southern Mozambique Channel.

  6. Percutaneous Liver Biopsies Guided with Ultrasonography: A Case Series

    International Nuclear Information System (INIS)

    Although liver biopsy is an easy procedure for hospitalized patients and outpatients, some complications may occur. To evaluate the efficiency, complications, safety and clinicopathological utility of ultrasonographic-guided percutaneous liver biopsy in diffuse liver disease. In our retrospective study, we evaluated ultrasound-assisted needle biopsies that were performed in outpatients from October 2006 to July 2010. The liver biopsies were performed following one-night fasting using the tru-cut biopsy gun (18-20 gauge) after marking the best seen and hypovascular part of the liver, distant enough from the adjacent organs. A total of 1018 patients were referred to our radiology department. Most of the patients had hepatitis B (60.6%). The biopsy specimens were recorded and sent to our pathology department for histopathological examination. According to the results of our series, percutaneous liver biopsy using the tru-cut biopsy gun guided by ultrasonography can be performed safely. We resolve that routine ultrasound of the puncture site is a quick, effective and safe procedure. The complication rate is very low. The US-assisted percutaneous liver biopsy should be used for all cases

  7. Evaluation of an interactive breath-hold control system in CT-guided lung biopsy

    International Nuclear Information System (INIS)

    Purpose: In this study we assessed the effect of an interactive breath-hold control system on procedure time and technical success in transthoracic CT-guided lung biopsies. Materials and Methods: in 36 patients (4 female, 32 male, mean age 65 years; range 33 - 88) with a pulmonary nodule, we performed CT-guided biopsy using a 18G Tru-cut needle (Cardinal Health, Dublin, UK) in a 64 row dual-source CT scanner (Somatom Definition, Siemens, Forchheim, Germany) using intermittent imaging of the needle. In half of the patients (2 female, 16 male, mean age 67 years), an interactive breathhold control system (IBC) (Mayo Clinic Medical Devices, USA) was applied. No additional device was used in the control group. Results: the biopsy was visually successful in all patients. The diameter of the target lesion was comparable in both groups (IBC: 30 ± 19 mm; control: 28 ± 15 mm). The number of imaging steps was significantly smaller (p < 0.05) and the intervention time was significantly shorter (p < 0.05) in the IBC group (IBC: 9 ± 5 steps 17 ± 10 min; control: 13 ± 5 steps 26 ± 12 min). Conclusion: application of the IBC unit reduced the intervention time and radiation exposure in CT-guided Tru-cut biopsy of pulmonary nodules. (orig.)

  8. Cytological diagnosis of a metastatic canine mammary tumor in pleural effusion Diagnóstico citológico de tumor mamário metastático canino em derrame pleural

    OpenAIRE

    Cassali, G.D.; Gärtner, F.; M.J. Vieira da Silva; Schmitt, F C

    1999-01-01

    Descrevem-se os achados citomorfológicos de um tumor maligno de mama em uma cadela Poodle de sete anos de idade, o qual foi observado inicialmente pelo exame citológico do derrame pleural. Comparam-se os aspectos citológicos do derrame pleural e punção aspirativa com agulha fina do tumor com aqueles descritos para o câncer de mama na espécie humana.

  9. Cytological diagnosis of a metastatic canine mammary tumor in pleural effusion

    OpenAIRE

    Cassali G.D.; Gärtner F.; Vieira da Silva M.J.; Schmitt F.C.

    1999-01-01

    Descrevem-se os achados citomorfológicos de um tumor maligno de mama em uma cadela Poodle de sete anos de idade, o qual foi observado inicialmente pelo exame citológico do derrame pleural. Comparam-se os aspectos citológicos do derrame pleural e punção aspirativa com agulha fina do tumor com aqueles descritos para o câncer de mama na espécie humana.

  10. Observed characteristics of Mozambique Channel eddies

    Science.gov (United States)

    Swart, N. C.; Lutjeharms, J. R. E.; Ridderinkhof, H.; de Ruijter, W. P. M.

    2010-09-01

    The flow in the Mozambique Channel is dominated by large, southward propagating, anti-cyclonic eddies, as opposed to a steady western boundary current. These Mozambique Channel eddies feed their waters into the Agulhas Current system, where they are thought to have a significant influence on the formation of the Natal Pulse and Agulhas Ring shedding. Here we use in situ hydrographic and nutrient data, together with satellite altimetry and surface velocity profilers to provide a detailed characterization of the Mozambique Channel eddies. Two warm eddies in the Channel at 20°S and 24°S had diameters of over 200 km. They rotated anti-cyclonically with a tangential velocity of over 0.5 m.s-1. Vertical sections show that the eddies reached to the bottom of the water column. Relative to the surrounding waters, the features were warm and saline. The total heat and salt anomalies for the southernmost eddy were computed relative to a reference station close by. At 24°S the total anomalies were 1.3 × 1020 J and 6.9 × 1012 kg, respectively, being on par with Agulhas rings. Mozambique Channel eddies thus have the potential to form a major contribution to the southward eddy heat flux in the Agulhas Current system. The feature also had positive nutrient and negative oxygen anomalies. The large magnitude of the water mass anomalies within the eddy suggests that interannual variability in Mozambique Channel eddy numbers would have a significant impact on downstream water mass characteristics.

  11. Thermorheological and textural behaviour of gluten-free gels obtained from chestnut and rice flours

    OpenAIRE

    Torres, Maria D.; Fradinho, Patricia; Raymundo, Anabela; Sousa, Isabel

    2013-01-01

    Nowadays, as celiac disease is becoming more common the consumers’ demand for gluten-free products with high nutritional and taste quality is increasing. This work deals with the study of the impact of four novelty gluten-free sources: chestnut flour (Cf), whole rice flour (Rw), Carolino rice flour (Rc) and Agulha rice flour (Ra). Textural, thermorheological and stability performance of gluten-free gels using different experimental techniques were evaluated. Mixed gels...

  12. Southern African continental margin: Dynamic processes of a transform margin

    OpenAIRE

    N. Parsiegla; Jacek Stankiewicz; Gohl, K.; Trond Ryberg; G. Uenzelmann-Neben;  

    2009-01-01

    Dynamic processes at sheared margins associated with the formation of sedimentary basins and marginal ridges are poorly understood. The southern African margin provides an excellent opportunity to investigate the deep crustal structure of a transform margin and to characterize processes acting at these margins by studying the Agulhas-Falkland Fracture Zone, the Outeniqua Basin, and the Diaz Marginal Ridge. To do this, we present the results of the combined seismic land-sea experiments of the ...

  13. A reinserção do estilete não afeta a incidência de cefaleia pós-punção dural (CPPD após raquianestesia

    Directory of Open Access Journals (Sweden)

    Nadir S. Sinikoglu

    2013-04-01

    Full Text Available JUSTIFICATIVA E OBJETIVOS: Este estudo foi conduzido para investigar os efeitos da reinserção do estilete em cefaleia pós-punção dural (CPPD após raquianestesia. MÉTODOS: Foram selecionados para este estudo 630 pacientes submetidos a cirurgia eletiva com raquianestesia. Os pacientes foram randomicamente designados para dois grupos: Grupo A (reinserção do estilete antes da retirada da agulha e Grupo B (retirada da agulha sem reinserção do estilete. Os pacientes foram observados durante 24 horas no hospital e avaliados quanto à CPPD no terceiro e sétimo dias do estudo. RESULTADOS: No geral, a incidência da CPPD foi de 10,8% (68 pacientes. Trinta e três desses pacientes (10,5% que estavam no Grupo A e 35 (11,1% no grupo B tiveram CPPD. Não houve diferença significativa entre os dois grupos em relação à CPPD. CONCLUSÕES: Ao contrário da punção lombar diagnóstica, a reinserção do estilete após raquianestesia com agulhas tipo Quincke de calibre 25 não reduz a incidência de CPPD.

  14. Response of the South Atlantic circulation to an abrupt collapse of the Atlantic meridional overturning circulation

    Energy Technology Data Exchange (ETDEWEB)

    Laurian, Audine [University of Hawai' i at Manoa, International Pacific Research Center, School of Ocean and Earth Science and Technology, Honolulu, HI (United States); Drijfhout, Sybren S. [Royal Netherlands Meteorological Institute, De Bilt (Netherlands)

    2011-08-15

    The South Atlantic response to a collapse of the North Atlantic meridional overturning circulation (AMOC) is investigated in the ECHAM5/MPI-OM climate model. A reduced Agulhas leakage (about 3.1 Sv; 1 Sv = 10{sup 6} m{sup 3} s{sup -1}) is found to be associated with a weaker Southern Hemisphere (SH) supergyre and Indonesian throughflow. These changes are due to reduced wind stress curl over the SH supergyre, associated with a weaker Hadley circulation and a weaker SH subtropical jet. The northward cross-equatorial transport of thermocline and intermediate waters is much more strongly reduced than Agulhas leakage in relation with an AMOC collapse. A cross-equatorial gyre develops due to an anomalous wind stress curl over the tropics that results from the anomalous sea surface temperature gradient associated with reduced ocean heat transport. This cross-equatorial gyre completely blocks the transport of thermocline waters from the South to the North Atlantic. The waters originating from Agulhas leakage flow somewhat deeper and most of it recirculates in the South Atlantic subtropical gyre, leading to a gyre intensification. This intensification is consistent with the anomalous surface cooling over the South Atlantic. Most changes in South Atlantic circulation due to global warming, featuring a reduced AMOC, are qualitatively similar to the response to an AMOC collapse, but smaller in amplitude. However, the increased northward cross-equatorial transport of intermediate water relative to thermocline water is a strong fingerprint of an AMOC collapse. (orig.)

  15. Modes of the southern extension of the East Madagascar Current

    Science.gov (United States)

    Siedler, Gerold; Rouault, Mathieu; Biastoch, Arne; Backeberg, Bjorn; Reason, Chris J. C.; Lutjeharms, Johann R. E.

    2009-01-01

    Data sets from satellite observations and a nested high-resolution model are used to study a source region of the Agulhas Current. Altimeter-derived geostrophic surface currents are averaged over varying periods, providing evidence of the persistence of flow patterns in the extension of the southern branch of the East Madagascar Current (SEMC). South of Madagascar, the SEMC separates into one branch toward the Agulhas Current and into a second branch retroflecting and connecting to the Subtropical Indian Ocean Countercurrent (SICC). Good agreement is found between long-term mean patterns of observational and model dynamic heights. Two basic modes are identified in the SEMC extension, with anticyclonic motion favoring retroflection in the northern Mozambique Basin when the extension is in a southwestward direction and cyclonic motion occurring in the case of the SEMC flowing westward along the southern Madagascar slope. A cross-correlation sequence between model SEMC transports and the modal changes in the extension region displays a correlation at about 1-month lag which agrees with eddy propagation time from the SEMC to the outflow region. Mean model SEMC transports are determined using floats released at 21°S, and the contribution of the SEMC to the SICC is obtained using floats injected at 55°E with the model running backward. Almost half of the SEMC volume transport contributes to the Agulhas system, and about 40% of SICC water originates from the SEMC.

  16. Lipoid pneumonia in infants: A radiological-pathological study

    International Nuclear Information System (INIS)

    A series of nine infants, 2-8 months of age, with a history of animal or vegetable fat intake within 10 days after birth, is presented. The infants developed respiratory problems and failure to thrive. Plain films and computed tomography showed areas of consolidation in the medial-posterior parts of the lungs. The areas of consolidation showed three types of changes of computed tomography. Attenuation measurements did not reveal fat. To establish the diagnosis, fine needle aspiration biopsy, tru-cut biopsy and/or open lung biopsy was done in eight infants and bronchopulmonary lavage in one patient. The pathological findings were an intense lymphocytic infiltration with scattered granulomas which contained lipid deposit. (orig.)

  17. GRANULOMATOSIS WITH POLYANGIITIS: A CASE REPORT

    Directory of Open Access Journals (Sweden)

    Allena Prem

    2015-04-01

    Full Text Available INTRODUCTION : Granulomatosis with polyangiitis ( GPA is an important form of AAV ( ANCA associated vasculitis syndrome . Being a multisystem disease , it can manifest in several combinations and can mimic an infection or malignancy . CASE PRESENTATION : A 55 years old man presented with cough , expectoration , haemoptysis , chronic otorrhoea and hearing loss . Imaging study suggested malignant mass lesion in right upper lobe with metastasis . HRCT o f Temporal bones showed chronic sclerosing mastoiditis with bilateral CSOM . USG Abdomen and urine examination suggested acute glomerulonephritis . Trucut biopsy of lung showed granuloma and ANCA assays showed him C ANCA positive . Treatment with prednisolone and cyclophosphamide resulted in rapid resolution of symptoms and radiological clearance . CONCLUSION : Since G P A can effect almost any organ and a high degree of suspicion should be maintained in any multisystemic disease . Rapid work up with biopsy and ANC A Assay and early treatment with immunosuppressants will prevent irreversible organ damage .

  18. Lipoid pneumonia in infants: A radiological-pathological study

    Energy Technology Data Exchange (ETDEWEB)

    Hugosson, C.O. (King Faisal Specialist Hospital and Research Centre, Riyadh (Saudi Arabia). Dept. of Radiology); Riff, E.J.; Tufenkeji, H.T. (King Faisal Specialist Hospital and Research Centre, Riyadh (Saudi Arabia). Dept. of Pediatrics); Moore, C.C.M. (King Faisal Specialist Hospital and Research Centre, Riyadh (Saudi Arabia). Dept. of Surgery); Akhtar, M. (King Faisal Specialist Hospital and Research Centre, Riyadh (Saudi Arabia). Dept. of Pathology)

    1991-04-01

    A series of nine infants, 2-8 months of age, with a history of animal or vegetable fat intake within 10 days after birth, is presented. The infants developed respiratory problems and failure to thrive. Plain films and computed tomography showed areas of consolidation in the medial-posterior parts of the lungs. The areas of consolidation showed three types of changes of computed tomography. Attenuation measurements did not reveal fat. To establish the diagnosis, fine needle aspiration biopsy, tru-cut biopsy and/or open lung biopsy was done in eight infants and bronchopulmonary lavage in one patient. The pathological findings were an intense lymphocytic infiltration with scattered granulomas which contained lipid deposit. (orig.).

  19. AGR2 Predicts Tamoxifen Resistance in Postmenopausal Breast Cancer Patients

    Directory of Open Access Journals (Sweden)

    Roman Hrstka

    2013-01-01

    Full Text Available Endocrine resistance is a significant problem in breast cancer treatment. Thus identification and validation of novel resistance determinants is important to improve treatment efficacy and patient outcome. In our work, AGR2 expression was determined by qRT-PCR in Tru-Cut needle biopsies from tamoxifen-treated postmenopausal breast cancer patients. Our results showed inversed association of AGR2 mRNA levels with primary treatment response (P=0.0011 and progression-free survival (P=0.0366 in 61 ER-positive breast carcinomas. As shown by our experimental and clinical evaluations, elevated AGR2 expression predicts decreased efficacy of tamoxifen treatment. From this perspective, AGR2 is a potential predictive biomarker enabling selection of an optimal algorithm for adjuvant hormonal therapy in postmenopausal ER-positive breast cancer patients.

  20. MASTITIS GRANULOMATOSA IDIOPÁTICA Y MASTITIS DE CÉLULAS PLASMÁTICAS: EXPERIENCIA DE TRES AÑOS

    OpenAIRE

    Raúl Barrero P; Alicia Benavides M; Manuel León B.; David Barrero V.; Victoria Vargas V.

    2005-01-01

    Se evaluó el manejo de 13 pacientes con mastitis granulomatosa idiopática y mastitis de células plasmáticas, tratadas en el Hospital Félix Bulnes, por un período de tres años. Se estudió la relación con la edad, anticoncepción, embarazo, lactancia y la atopia. Se evaluaron las limitaciones de la mamografía y de la ecotomografía mamaria y el uso de la biopsia trucut. Se compararon los resultados del tratamiento médico y quirúrgico13 patients with granulomatous mastitis and plasmatic cell masti...

  1. Prevalence of testicular microlithiasis in 382 non vasectomized, azoospermic men

    DEFF Research Database (Denmark)

    Fedder, J.

    2015-01-01

    borderline TM (bTM) with about 5 (3 to 7) TM elements in one or both testicles. Representative testicular biopsies were taken in 300 men using a TruCut needle, Ch.14 (Angiotech, USA). Frequencies of Carcinoma In Situ (CIS) testis/malignancy in men with different categories of TM were compared to men without...... found, e.g. 10 (23%) of the 44 men with KS and 4 (20%) of the 20 men with Y microdeletions had a history of cryptorchidism. Of the men with KS, 5 had extensive TM, 3 (7%) uTM and 2 (5%) pTM, while 14 (32%) showed bTM. Of 101 men with a history of cryptorchidism, 3 (3%) had uTM, 4 (4%) pTM, and 13 (13...

  2. Standards in radiographically guided biopsies - indications, techniques, complications

    International Nuclear Information System (INIS)

    In the first place, different needle types are presented, in particular, biopsy cannulae applying the ''TruCut'' principle and devices suitable for bone biopsy. Important aids for the daily practice, such as tandem technology and coaxial technology, are presented. Advantages and disadvantages are discussed, together with the most important sites of target-directed fluoroscopy, sonography and computer tomography as well as CT-fluoroscopy. Local anesthesia and analgosedation are presented, and the general and specific caliber- or entrance-dependent contraindications are described. The literature is reviewed for data of severe complications, such as death or tumor cell deposits along the puncture site. For the different targets in thorax and abdomen, the typical indications, points of entrance, contraindications, complications and special techniques are described, and the value of the biopsy for these localizations is presented. Under the heading ''Tips and Tricks'', practical advice useful for the daily routine can be found. (orig.)

  3. Evaluation of a novel Seldinger-needle for computed tomography guided interventions: initial experiences

    International Nuclear Information System (INIS)

    To evaluate a new Seldinger puncture device for computed tomography-guided interventions under difficult conditions, to analyze applicability, and to investigate assets and drawbacks. From November 2007 to March 2008, we performed CT-guided interventions in 16 patients (7 women, 9 men; mean age 62 years old) using a new 20G-Seldinger needle (Sika-Med, Wiehl, Germany). This novel needle serves as a guide for many different interventional devices due to a guide wire welded on the proximal needle end. It allows continuous application of anesthesia via four tiny holes at the distal needle end until the region of interest is reached. Each intervention was subject to difficult interventional conditions. The indications for intervention were drainage (n = 7), Trucut biopsy of tumor (n = 8) and radiofrequency ablation (n = 1). Handling, success, advantages, drawbacks, complications and patient tolerance were noted after each procedure. A pain scale from 1 - 10 was used to grade the pain level during the intervention. All interventions were performed successfully and no severe complications were observed. Patient tolerance was very good resulting in a mean pain score of 2 ± 1. Regions with dangerous and difficult access were successfully reached with the new Seldinger needle in 15 of 16 cases by dilatation of the puncture tract and continuous administration of local anesthesia via the system. Furthermore, different devices such as Trucut systems and a drainage catheter were able to be inserted without complication via the needle. With a proximal removable luer-lock connection, liquid material was able to be aspirated in six cases. Under difficult interventional conditions, the use of a Seldinger needle as a reliable technique for CT-guided interventions can provide a safe and successful procedure. (orig.)

  4. Evaluation of a novel Seldinger-needle for computed tomography guided interventions: initial experiences; Evaluierung einer neuen Seldinger-Nadel fuer computertomografisch gesteuerte Interventionen: Erste Erfahrungen

    Energy Technology Data Exchange (ETDEWEB)

    Plumhans, C.; Mahnken, A.; Iwa, R.; Behrendt, F.F.; Sebastian, K.; Guenther, R.W.; Honnef, D. [Universitaetsklinikum RWTH Aachen (Germany). Klinik fuer Radiologische Diagnostik

    2009-02-15

    To evaluate a new Seldinger puncture device for computed tomography-guided interventions under difficult conditions, to analyze applicability, and to investigate assets and drawbacks. From November 2007 to March 2008, we performed CT-guided interventions in 16 patients (7 women, 9 men; mean age 62 years old) using a new 20G-Seldinger needle (Sika-Med, Wiehl, Germany). This novel needle serves as a guide for many different interventional devices due to a guide wire welded on the proximal needle end. It allows continuous application of anesthesia via four tiny holes at the distal needle end until the region of interest is reached. Each intervention was subject to difficult interventional conditions. The indications for intervention were drainage (n = 7), Trucut biopsy of tumor (n = 8) and radiofrequency ablation (n = 1). Handling, success, advantages, drawbacks, complications and patient tolerance were noted after each procedure. A pain scale from 1 - 10 was used to grade the pain level during the intervention. All interventions were performed successfully and no severe complications were observed. Patient tolerance was very good resulting in a mean pain score of 2 {+-} 1. Regions with dangerous and difficult access were successfully reached with the new Seldinger needle in 15 of 16 cases by dilatation of the puncture tract and continuous administration of local anesthesia via the system. Furthermore, different devices such as Trucut systems and a drainage catheter were able to be inserted without complication via the needle. With a proximal removable luer-lock connection, liquid material was able to be aspirated in six cases. Under difficult interventional conditions, the use of a Seldinger needle as a reliable technique for CT-guided interventions can provide a safe and successful procedure. (orig.)

  5. Influência do preparo do orifício piloto na ancoragem dos parafusos pediculares Effect of the pilot hole preparation on the anchorage of pedicle screws

    OpenAIRE

    Gustavo Silva Abrahão; Rodrigo César Rosa; Rodrigo Okubo; Antônio Carlos Shimano

    2012-01-01

    OBJETIVO: Avaliamos a influência do diâmetro e do modo de preparação do orifício piloto na resistência ao arrancamento e no torque de inserção dos parafusos pediculares com diâmetro interno cônico. MÉTODOS: Ensaios mecânicos foram realizados com parafusos pediculares com alma cônica e diâmetro de 4,2mm e 5,2mm inseridos nos pedículos vertebrais lombares de suínos. O orifício piloto foi confeccionado com de broca e sondas (pontiaguda e cortante) com diferentes diâmetros. RESULTADOS: Testando o...

  6. Experiencias con distrofia simpática refleja

    OpenAIRE

    Hernández Castro, John Jairo

    2012-01-01

    Se presentan 30 pacientes con distrofia simpática refleja vistos en la Clínica del Dolor del Hospital San Juan de Dios de Santafé de Bogotá, entre enero de 1992 y julio de 1993. La mayoría de los enfermos son hombres entre los 20 y los 40 años. La causa de la entidad, en el 66.6% de los casos, es el trauma por proyectil de arma de fuego; los restantes fueron producidos per hernia discal lumbar, cirugía de hombro, operación cesárea, artroscopia de rodilla, herida cortante en mano, infarto del ...

  7. Condiciones de la superficie deslizamiento con falla

    Directory of Open Access Journals (Sweden)

    María Cecilia Sierra B.

    2011-06-01

    Full Text Available Se modelan seis (6 taludes can diferentes ángulos de inclinación y peso unitario de 1.8 ton/m3, módulo de Young de 500 ton/m2 y relación de Poisson de 0.45. En cada uno de estos taludes se calculan los esfuerzos a través del talud y se determinan los puntos que están sometidos a mayores esfuerzos cortantes, correspondiendo estos a los estados de esfuerzos mas críticos, La ubicación de estos puntos es por donde comenzará y terminará la superficie de falla. Se obtiene un gráfico de diseño que permite obtener la pendiente máxima que debe tener un talud para que no se presente falla local en ningún punto.

  8. Avaliação dos resíduos de serviços de saúde do Grupo A em hospitais de Vitória (ES), Brasil

    OpenAIRE

    Saulo Alves Aduan; Florindo dos Santos Braga; Eliana Zandonade; David Salles; Noil Amorim de Menezes Cussiol; Liséte Celina Lange

    2014-01-01

    Nesta pesquisa, quantificam-se e classificam-se, conforme a Resolução RDC ANVISA nº 306/2004, os Resíduos de Serviço de Saúde do Grupo A, gerados em seis hospitais de Vitória (ES), Brasil. Os resíduos acondicionados sem segregação foram separados por grupos e subgrupos, resultando em: 57% do Grupo D - comum; 41% do Grupo A - risco biológico; 1,5% do Grupo B - risco químico e 0,05% do Grupo E - perfuro-cortantes. O peso específico aparente foi de 106,2 kg.m-3 e a taxa média de geração de resíd...

  9. Análisis mecánico y tribológico de los recubrimientos fe-cr-ni-c y ni-al-mo

    OpenAIRE

    MUÑOZ, JORGE E.; JOHN J. CORONADO

    2008-01-01

    En este trabajo de investigación se evaluaron dos recubrimientos aplicados por medio de la técnica de rociado térmico por combustión, la aleación: Ni=89%, Al = 5,5%, Mo=5,5% y la aleación Fe=81,8%, Cr=16%, Ni=2%, C=0,2. La preparación superficial de las probetas se realizó usando chorro de arena. Se realizaron pruebas de resistencia al cortante, adherencia, desgaste abrasivo, desgaste por deslizamiento y flexión en cuatro puntos. El recubrimiento Fe-Cr-Ni-C presentó menor pérdida de masa, tan...

  10. Impact of the Indonesian Throughflow on the Atlantic Meridional Overturning Circulation

    Science.gov (United States)

    Le Bars, Dewi; Dijkstra, Henk

    2014-05-01

    Understanding the mechanisms controlling the strength and variability of the Atlantic Meridional Overturning Circulation (AMOC) is one of the main topics of climate science and in particular physical oceanography. Current simple representations of the global ocean overturning separates the surface return flow to the Atlantic basin into a cold water path through the Drake Passage and a warm water path through the Indonesian Throughflow and Agulhas leakage. The relative importance of these two paths has been investigated in non-eddying ocean models. In these models the Agulhas retroflection cannot be modelled properly, which leads to an important overestimation of the Agulhas leakage. Furthermore, it seems that the in these models the relation between the meridional density gradient and the overturning strength is greatly simplified and changes significantly when eddies are resolved (Den Toom et al. 2013). As a result, the impact of the Pacific-Indian Oceans exchange through the Indonesian Throughflow on the AMOC is still unknown. To investigate this question we run a state-of-the-art ocean model, the Parallel Ocean Program (POP), globally, at eddy resolving resolution (0.1º). Using climatological forcing from the CORE dataset we perform two simulations of 110 years, a control experiment with realistic coastlines and one in which the Indonesian Passages are closed. Results show that, for a closed Indonesian Throughflow, the Indian Ocean cools down but its salinity increases. The Agulhas leakage reduces also by 3Sv (Le Bars et al. 2013) and the net effect on the south Atlantic is a cooling down and decrease salinity. The anomalies propagate slowly northward and a significant decrease of the AMOC is found at 26ºN after 50 years. This decrease AMOC also leads to reduced northward heat flux in the Atlantic. These processes are investigated with a detailed analysis of the heat and freshwater balances in the Atlantic-Arctic region and in the region south of 34ºS where

  11. Evidence for panmixia despite barriers to gene flow in the southern African endemic, Caffrogobius caffer (Teleostei: Gobiidae

    Directory of Open Access Journals (Sweden)

    von der Heyden Sophie

    2008-12-01

    Full Text Available Abstract Background Oceanography and life-history characteristics are known to influence the genetic structure of marine species, however the relative role that these factors play in shaping phylogeographic patterns remains unresolved. The population genetic structure of the endemic, rocky shore dwelling Caffrogobius caffer was investigated across a known major oceanographic barrier, Cape Agulhas, which has previously been shown to strongly influence genetic structuring of South African rocky shore and intertidal marine organisms. Given the variable and dynamic oceanographical features of the region, we further sought to test how the pattern of gene flow between C. caffer populations is affected by the dominant Agulhas and Benguela current systems of the southern oceans. Results The variable 5' region of the mtDNA control region was amplified for 242 individuals from ten localities spanning the distributional range of C. caffer. Fifty-five haplotypes were recovered and in stark contrast to previous phylogeographic studies of South African marine species, C. caffer showed no significant population genetic structuring along 1300 km of coastline. The parsimony haplotype network, AMOVA and SAMOVA analyses revealed panmixia. Coalescent analyses reveal that gene flow in C. caffer is strongly asymmetrical and predominantly affected by the Agulhas Current. Notably, there was no gene flow between the east coast and all other populations, although all other analyses detect no significant population structure, suggesting a recent divergence. The mismatch distribution suggests that C. caffer underwent a population expansion at least 14 500 years ago. Conclusion We propose several possible life-history adaptations that could have enabled C. caffer to maintain gene flow across its distributional range, including a long pelagic larval stage. We have shown that life-history characteristics can be an important contributing factor to the phylogeography of marine

  12. Eddies in the southern Mozambique Channel

    Science.gov (United States)

    Quartly, G. D.; Srokosz, M. A.

    2004-01-01

    The Agulhas Current system contains one of the world's strongest western boundary currents, and plays an important part in the warm water path of the global thermohaline circulation. However, there have been few surveys of the source regions of the Agulhas Current, and thus little in situ measurement of their variability. Utilizing the more than 5-year record of SeaWiFS data, we examine the eddy activity present in the southern portion of the Mozambique Channel. The two sources of Agulhas input from the central Indian Ocean (southward flow through the Mozambique Channel and westward flow around the southern limit of Madagascar) both show great temporal variability, with no clear seasonal signal. A number of large (˜200 km diameter) anticyclonic rings intermittently propagate poleward along the western edge of the channel, sweeping coastal waters into mid-channel. Their passage past Maputo appears to affect the circulation of the lee eddy in the Delagoa Bight. The eastern side of the channel is mainly characterized by cyclonic eddies. These are made manifest in the lee of the southern tip of Madagascar, although it is not clear whether many form there or just develop a visible presence due to entrainment of high-chlorophyll coastal waters. Several of these cyclonic eddies then appear to move in west-southwesterly direction. The chlorophyll data do reveal the apparent East Madagascar Retroflection on occasions, but do not show clear examples of the pinching off of anticyclonic eddies. However, surface waters from the East Madagascar Current may reach the African mainland on occasions when no retroflection is present.

  13. Holocene climate variability in the Winter Rainfall Zone of South Africa

    Directory of Open Access Journals (Sweden)

    S. Weldeab

    2013-05-01

    Full Text Available We established a multi-proxy time series comprising analyses of major elements in bulk sediments, Sr and Nd isotopes and grain size of terrigenous fraction, and δ18O and δ13C in tests of Neogloboquadrina pachyderma (sinistral from a marine sediment sequence recovered off the Orange River. The records reveal coherent patterns of variability that reflect changes in wind strength, precipitation over the river catchments, and upwelling of cold and nutrient-rich coastal waters off western South Africa. The wettest episode of the Holocene in the Winter Rainfall Zone (WRZ of South Africa occurred during the "Little Ice Age" (700–100 yr BP. Wet phases were accompanied by strengthened coastal water upwellings, a decrease of Agulhas water leakage into the southern Atlantic, and a reduced dust incursion over Antarctica. A continuous aridification trend in the WRZ and a weakening of the southern Benguela Upwelling System (BUS between 9000 and 5500 yr BP parallel with increase of dust deposition over Antarctica and an enhanced leakage of warm Agulhas water into the southeastern Atlantic. The temporal relationship between precipitation changes in the WRZ, the thermal state of the coastal surface water, and leakage of warm water in southern Atlantic, and variation of dust incursion over Antarctica suggests a causal link that most likely was related to latitudinal shifts of the Southern Hemisphere westerlies. Our results of the mid-Holocene time interval may serve as an analogue to a possible long-term consequence of the current and future southward shift of the westerlies that may result in a decline of rainfall over southwest Africa and a weakened upwelling with implication for phytoplankton productivity and fish stocks. Furthermore, warming of the coastal surface water as a result of warm Agulhas water incursion into the southern BUS may affect coastal fog formation that is critical as moisture source for the endemic flora of the Namaqualand.

  14. Holocene climate variability in the winter rainfall zone of South Africa

    Directory of Open Access Journals (Sweden)

    S. Weldeab

    2013-10-01

    Full Text Available We established a multi-proxy time series comprising analyses of major elements in bulk sediments, Sr and Nd isotopes, grain size of terrigenous fraction, and δ18O and δ13C in tests of Neogloboquadrina pachyderma (sinistral from a marine sediment sequence recovered off the Orange River. The records reveal coherent patterns of variability that reflect changes in wind strength, precipitation over the river catchments, and upwelling of cold and nutrient-rich coastal waters off western South Africa. The wettest episode of the Holocene in the winter rainfall zone (WRZ of South Africa occurred during the "Little Ice Age" (700–100 cal years BP most likely in response to a northward shift of the austral westerlies. Wet phases and strengthened coastal water upwellings are companied by a decrease of Agulhas water leakage into the South Atlantic and a reduced dust incursion over Antarctica, as indicated in previous studies. A continuous aridification trend in the WRZ and a weakening of the southern Benguela Upwelling System (BUS between 9000 and 5500 cal years BP parallel with increase of dust deposition over Antarctica and an enhanced leakage of warm Agulhas water into the eastern South Atlantic. The temporal relationship between precipitation changes in the WRZ, the thermal state of the coastal surface water, and leakage of warm water in the South Atlantic, and variation of dust incursion over Antarctica suggests a causal link that most likely was related to latitudinal shifts of the Southern Hemisphere westerlies. Our results of the mid-Holocene time interval may serve as an analogue to a possible long-term consequence of the current and future southward shift of the westerlies. Furthermore, warming of the coastal surface water as a result of warm Agulhas water incursion into the southern BUS may affect coastal fog formation.

  15. Influência do dano físico na fisiologia pós-colheita de folhas de taioba

    OpenAIRE

    Teresa Drummond Correia Mendes; Joice Simone dos Santos; Luciana Marques Vieira; Deise Silva Castro Pimentel Cardoso; Fernando Luiz Finger

    2011-01-01

    Folhas de taioba danificadas fisicamente tornam-se amarelas e escuras na região do dano. Assim, o objetivo deste trabalho foi avaliar o efeito do dano físico sobre o metabolismo pós-colheita de folhas de taioba. Para esse fim, avaliou-se o teor de clorofila e o acúmulo de compostos fenólicos solúveis em discos foliares de taioba que continham furos realizados com uma agulha em um dos lados da folha, simulando os danos sofridos no campo e transporte. O lado não danificado foi usado como tratam...

  16. Cateteres intravenosos: estudo de condições bacteriológicas e avaliação da assistência de enfermagem

    OpenAIRE

    Maria Lúcia C. C Robazzi; Maria Helena M Bechelli; Carlos Emílio Levy; Tokico M Moriya

    1984-01-01

    Embora organizações de saúde Internacionais e autores nacionais tenham emitido há alguns anos diretrizes a serem aplicadas aos cateteres intravenosos, tanto introduzidos através de agulhas como de flebotomias, tem-se observado que estas não têm sido respeitadas. Os autores realizaram estudos junto a pacientes internados em um hospital de Ribeirão Preto, com os objetivos de verificar o tempo de permanência desses cateteres, relacionando-o com suas condições bacteriológicas e dos curativos real...

  17. Speed determination at the accident scene: needle slap effect

    OpenAIRE

    Charles Albert Andrade; Jorge Luiz Farias; Juliano de Andrade Gomes

    2015-01-01

    Nas reconstruções de acidentes de trânsito é muito importante determinar a velocidade do veículo no momento da colisão. Como se segue, pode-se utilizar as Leis da Física ou métodos alternativos. Nesta perspectiva, uma técnica interessante para estabelecer essa velocidade é o efeito needle slap, em que uma marca é feita na face do mostrador do velocímetro pela agulha no momento do impacto. Neste artigo, mostra-se como identificar esse efeito usando as seguintes técnicas de laboratório: Espectr...

  18. Comparação de diferentes doses de colagenase em modelo de indução de tendinite para eqüinos: estudo clínico e ultra-sonográfico Comparison of different doses of collagenase-induced equine tendonitis: clinical and ultrasonographic study

    OpenAIRE

    Ana Lucia Miluzzi Yamada; Ana Liz Garcia Alves; Carlos Alberto Hussni; José Luiz de Mello Nicoletti; Armen Thomassian; Marcos Jun Watanabe; Rodrigo Carneiro

    2009-01-01

    Neste estudo, lesões tendíneas foram induzidas experimentalmente em eqüinos por meio da administração de diferentes doses de colagenase. Foram usados 12 eqüinos adultos, clinicamente sadios e distribuídos aleatoriamente em dois grupos que receberam diferentes doses de colagenase. O grupo 1 (G1) recebeu 1,25mg e o grupo 2 (G2) recebeu 2,5mg de colagenase. Com a agulha posicionada no centro dos tendões flexores digitais superficiais dos membros torácicos, as diferentes doses de colagenase foram...

  19. Acupunctura em neurologia veterinária de animais de companhia

    OpenAIRE

    Caetano, Cristina dos Santos Rosa

    2014-01-01

    Dissertação de Mestrado Integrado em Medicina Veterinária, Ciências Veterinárias A acupunctura é uma forma de terapia baseada na Medicina Tradicional Chinesa, que consiste na introdução de agulhas finas na pele, desencadeando uma cascata de efeitos fisiológicos locais, regionais ou sistémicos. Apesar de ser amplamente usada no controlo da dor e na fisioterapia, ainda é pouco usada como único método de tratamento. Nesta dissertação são abordados cinco casos clínicos de cães trat...

  20. Holocene climate variability in the winter rainfall zone of South Africa

    Directory of Open Access Journals (Sweden)

    S. Weldeab

    2012-06-01

    Full Text Available We established a multi-proxy time series comprising analyses of major elements in bulk sediments, Sr and Nd isotopes, grain size of terrigenous fraction, and δ18O and δ13C in tests of Neogloboquadrina pachyderma (sinistral from a marine sediment sequence recovered off the Orange River. The records reveal coherent patterns of variability that reflect changes in wind strength, precipitation over the river catchments, and upwelling of cold and nutrient-rich coastal waters off Western South Africa. The wettest episode of the Holocene in the Winter Rainfall Zone (WRZ of South Africa occurred during the "Little Ice Age" (700–100 yr BP. Wet phases were accompanied by strengthened coastal water upwellings, a decrease of Agulhas water leakage into the Southern Atlantic, and a reduced dust incursion over Antarctica. A continuous aridification trend in the WRZ and a weakening of the Southern Benguela Upwelling System (BUS between 9000 and 5500 yr BP parallel with evidence of a poleward shift of the austral mid-latitude westerlies and an enhanced leakage of warm Agulhas water into the Southeastern Atlantic. The temporal relationship between precipitation changes in the WRZ, the thermal state of the coastal surface water, and variation of dust incursion over Antarctica suggests a causal link that most likely was related to latitudinal shifts of the Southern Hemisphere westerlies and changes in the amount of Agulhas water leakage into the Southern BUS. Our results of the mid-Holocene time interval may serve as an analogue to a possible long-term consequence of the current and future southward shift of the westerlies that may result in a decline of rainfall over Southwest Africa and a weakened upwelling with implication for phytoplankton productivity and fish stocks. Furthermore, warming of the coastal surface water as a result of warm Agulhas water incursion into the Southern BUS may affect coastal fog formation that is

  1. Indução de estruturações esféricas ou similares durante a cristalização da água por processos físicos ou químicos Induction of spherical or similar structures during the water crystallization by physical or chemical process

    OpenAIRE

    Fabiano de Carvalho

    2007-01-01

    Estruturar cristais de gelo é atrativo devido à possibilidade de diminuir os danos causados pelo congelamento ao mínimo. A ocorrência de agulhas ou esqueletos danosos às células significa que foram desiguais os crescimentos das faces do cristal. Objetivou-se com este trabalho induzir a formação de sementes cristalinas menores, arredondadas ou com alto grau de simetria, para aumentar a probabilidade de crescimentos geometricamente semelhantes à forma original e que elimine crescimentos desigua...

  2. The circulation of the Mozambique channel

    Science.gov (United States)

    Sætre, Roald; Da Silva, António Jorge

    1984-05-01

    Based on hydrographic data from 1977 to 1980 off the coast of Mozambique and historical data from the Mozambique Channel, the general circulation pattern of the area is described. The circulation pattern is characterized by the influence of three anticyclonic gyres covering the northern, the central, and the southern parts of the channel. Additionally, smaller cyclonic eddies are observed, of which some probably are topographically induced. The results strongly indicate that in the upper 1000 m the role of the Mozambique Current as one of the tributaries to the Agulhas Current is of minor significance and draw into question the concept of the Mozambique Current as a continuous one.

  3. Estudo piloto dos efeitos da terapia hormonal sobre o tecido mamário normal de mulheres após a menopausa A pilot study of the effects of hormone therapy on normal breast tissue of postmenopausal women

    OpenAIRE

    Simone Elias; Rita de Cássia Maio Dardes; Cláudio Kemp; Angela Flavia Logullo; Thaís Heinke; Edmund Chada Baracat; Geraldo Rodrigues de Lima

    2006-01-01

    OBJETIVOS: avaliou-se o tecido mamário de mulheres antes e depois de seis meses de terapia estroprogestativa combinada contínua (0,625 mg de estrogênios conjugados eqüinos associados a 2,5 mg de acetato de medroxiprogesterona). MÉTODOS: todas as pacientes foram avaliadas antes de se instituir o tratamento e consideradas aptas para este. Foram obtidos fragmentos de tecido mamário por meio de biópsia percutânea com agulha grossa (acoplada a um propulsor automático - "core-biópsia"). O material ...

  4. Curva de aprendizado da sonoanatomia do plexo braquial na região axilar Curva de aprendizaje de la sonoanatomía del plexo braquial en la región axilar Learning curve for the ultrasound anatomy of the brachial plexus in the axillary region

    OpenAIRE

    Pablo Escovedo Helayel; Diogo Bruggeman da Conceição; Bruno S. Nascimento; Anderson Kohler; Gustavo Luchi Boos; Getúlio Rodrigues de Oliveira Filho

    2009-01-01

    JUSTIFICATIVA E OBJETIVOS: A proficiência em bloqueios guiados por ultrassom exige quatro habilidades: reconhecimento da sonoanatomia, capacidade de geração de imagens, alinhamento da agulha ao feixe ultrassonográfico e reconhecimento da dispersão do anestésico local. O objetivo deste estudo foi construir e avaliar curvas de aprendizado da geração de imagens e identificação ultrassonográfica das estruturas neurovasculares axilares. MÉTODO: Sete médicos em especialização em Anestesiologia rece...

  5. Determinação do volume mínimo efetivo de bupivacaína 0,5% para bloqueio do plexo braquial por via axilar guiado por ultrassom

    OpenAIRE

    Leonardo Henrique Cunha Ferraro; Alexandre Takeda; Luiz Fernando dos Reis Falcão; André Hosoi Rezende; Eduardo Jun Sadatsune; Maria Angela Tardelli

    2014-01-01

    Justificativa e objetivo: o uso do ultrassom para acompanhar o correto posicionamento da agulha e a dispersão do anestésico local permitiu a redução do volume de anestésico local necessário para o bloqueio de nervos periféricos. Existem poucos trabalhos sobre o volume mínimo efetivo de anestésico local para o bloqueio do plexo braquial via axilar (BPVA). Este estudo foi conduzido com o objetivo de determinar o volume mínimo efetivo (VE90) de bupivacaína 0,5% comadrenalina (1:200.000) para o ...

  6. Mean and Seasonal Circulation of the South Indian Ocean Estimated by Combining Satellite Altimetry and Surface Drifter Observations

    OpenAIRE

    N. Peter Benny; Daisuke Ambe; K. Rayaroth Mridula; Sahrum Ses; Kamaludin Mohd Omar; and Mohd Razali Mahmud

    2014-01-01

    The mean velocity field of south Indian Ocean has been derived by combining high resolution maps of sea level anomalies and the surface drifter data from the Global Drifter program from 1993 to 2012 with a resolution of 1/3 _ 1/3 degrees in latitude and longitude. The estimated mean velocity field exhibits strong western boundary currents, zonal currents and eastern boundary currents. The Agulhas Current shows a velocity of above 1.5 m s-1 at around _ The distribution of energy associated wit...

  7. Lycopodiaceae no Parque Nacional do Itatiaia, RJ e MG, Brasil Lycopodiaceae of Itatiaia National Park, Rio de Janeiro and Minas Gerais states, Brazil

    OpenAIRE

    Carla Gabriela Vargas Ramos; Lana da Silva Sylvestre

    2010-01-01

    O Parque Nacional do Itatiaia localiza-se na região Sudeste do Brasil, nos limites dos estados do Rio de Janeiro e Minas Gerais, com altitudes que variam de 390 a 2789 m (Pico das Agulhas Negras). Lycopodiaceae apresenta quatro gêneros e cerca de 500 espécies, com distribuição cosmopolita, caracterizando-se pelos microfilos e esporofilos eligulados e pela homosporia. A família está representada na área de estudo por 23 espécies e uma variedade, distribuídas em três gêneros (Huperzia, 15 espéc...

  8. Trabalhadores de um hospital escola em Fortaleza-CE: exposição cotidiana à hepatite B | Workers in a teaching hospital in Fortaleza, Ceará, Brazil: daily exposure to hepatitis B

    OpenAIRE

    Ana Gleice da Silveira Mota; Julianna de Freitas Siqueira; Francisco Gilberto Fernandes Pereira; Marta Maria Costa Freitas; Jorge Luíz Nobre Rodrigues; Joselany Áfio Caetano

    2015-01-01

    Estudo transversal, descritivo, quantitativo, que objetivou analisar os acidentes ocupacionais ocorridos entre os profissionais de saúde envolvendo risco para hepatite B, em um hospital escola, em 2013. Analisaram-se 95 notificações, a maioria (73,7%) mulheres, 39 (41,1%) técnico/auxiliar de enfermagem. A faixa etária prevalente foi 20 a 39 anos, com 62 (65,3%) profissionais. A exposição percutânea ocorreu em 77 (81,1%) casos, sendo a agulha com lúmen o principal objeto causador com 35 (36,8%...

  9. Decomposição de folhada de quatro espécies florestais no Norte de Portugal: Taxa de decomposição e evolução da composição estrutural e do teor em nutrientes Decomposition of litterfall from four forest species in Northern Portugal: Decomposition rate, and structural components and nutrient dynamics

    Directory of Open Access Journals (Sweden)

    A. Martins

    2009-01-01

    Full Text Available Estudou-se a decomposição e a dinâmica de nutrientes de folhas e agulhas senescentes de Castanea sativa (CS, Pinus pinaster (PP, Pinus nigra (PN e Pseudotsuga menziesii (PM durante 3,1 a 3,5 anos, bem como a evolução da composição química e estrutural dos mesmos resíduos durante 391 a 518 dias, por intermédio da técnica das saquetas. Os teores de N eram mais elevados nas agulhas de PM (14,5 g kg-1 e nas folhas de CS (12,1 g kg-1 do que nas agulhas de PP (3,8 g kg-1 e PN (4,7 g kg-1 e, implicando que a razão C/N fosse menor nas primeiras (respectivamente 39,0 e 46,8 do que nas segundas (respectivamente 147,7 e 122,2. As agulhas de PM apresentavam o teor mais elevado de Ca (9,1 g kg-1 e de compostos solúveis em álcool e água (384 g kg-1, contra 95 a 160 g kg-1 nas restantes espécies, mas o teor mais baixo em holocelulose (253 g kg-1, contra ±500 g kg-1 nas restantes espécies. A razão lenhina/N era muito maior nas agulhas de PP e PN (respectivamente 71,2 e 58,3 do que nas agulhas de PM e folhas de CS (respectivamente, 20,5 e 20,3, enquanto a razão holocelulose/lenhina se situava entre o mínimo de 0,9, nas agulhas de PM, e 1,9 -2,1 para as outras espécies. A taxa de decomposição anual para todo o período de estudo, seguindo o modelo exponencial negativo, decresceu segundo a ordem CS>PN>PM>PP (0,35, -0,27, -0,19 e -0,16, com valores mais elevados no primeiro ano em CS (-0,60 e PM (-0,31. Os constituintes solúveis e a hemicelulose decresceram em geral acentuadamente com o decorrer da decomposição, enquanto a lenhina e a celulose apresentaram pequena variação, nomeadamente nas agulhas de PP e PM. As quantidades remanescentes de K, Ca e Mg decresceram durante o processo de decomposição, atingindo no final do estudo respectivamente 17 a 65%, 30 a 60 % e 18 a 59% da inicial. As quantidades remanescentes finais de N (41 a 121 % e de P (33 a 104 % tanto foram inferiores como superiores às iniciais. A razão C/N diminuiu

  10. Potential of space-borne GNSS reflectometry to constrain simulations of the ocean circulation. A case study for the South African current system

    Science.gov (United States)

    Saynisch, Jan; Semmling, Maximilian; Wickert, Jens; Thomas, Maik

    2015-11-01

    The Agulhas current system transports warm and salty water masses from the Indian Ocean into the Southern Ocean and into the Atlantic. The transports impact past, present, and future climate on local and global scales. The size and variability, however, of the respective transports are still much debated. In this study, an idealized model based twin experiment is used to study whether sea surface height (SSH) anomalies estimated from reflected signals of the Global Navigation Satellite System reflectometry (GNSS-R) can be used to determine the internal water mass properties and transports of the Agulhas region. A space-borne GNSS-R detector on the International Space Station (ISS) is assumed and simulated. The detector is able to observe daily SSH fields with a spatial resolution of 1-5∘. Depending on reflection geometry, the precision of a single SSH observation is estimated to reach 3 cm (20 cm) when the carrier phase (code delay) information of the reflected GNSS signal is used. The average precision over the Agulhas region is 7 cm (42 cm). The proposed GNSS-R measurements surpass the radar-based satellite altimetry missions in temporal and spatial resolution but are less precise. Using the estimated GNSS-R characteristics, measurements of SSH are generated by sampling a regional nested general circulation model of the South African oceans. The artificial observations are subsequently assimilated with a 4DVAR adjoint data assimilation method into the same ocean model but with a different initial state and forcing. The assimilated and the original, i.e., the sampled model state, are compared to systematically identify improvements and degradations in the model variables that arise due to the assimilation of GNSS-R based SSH observations. We show that SSH and the independent, i.e., not assimilated model variables velocity, temperature, and salinity improve by the assimilation of GNSS-R based SSH observations. After the assimilation of 90 days of SSH observations

  11. A enfermagem frente a acidentes de trabalho com material potencialmente contaminado na era do HIV The nursing team and occupational accidents with potentially contaminated material in the era of HIV

    Directory of Open Access Journals (Sweden)

    Elucir Gir

    1998-10-01

    Full Text Available Realizou-se esta investigação, com os objetivos de identificar a ocorrência de acidentes de trabalho com material pérfuro-cortante potencialmente contaminado, entre enfermeiros e auxiliares de enfermagem de um Hospital de ensino geral do interior do Estado de São Paulo; relacionar a ocorrência destes acidentes com a categoria profissional e anos de trabalho na instituição; identificar o tipo de material pérfuro-cortante causador do acidente e identificar as condutas tomadas após o acidente, pelo acidentado. Para a coleta de dados, através de entrevista individual, utilizou-se um formulário estruturado onde registrava-se, a causa atribuída ao acidente, o período de atuação do profissional acidentado, o objeto causador, a conduta tomada após o acidente. Evidenciou-se que as Precauções Padrão ou as antigas Precauções Universais não são utilizadas como deveriam, conferindo portanto, risco à equipe de enfermagem. Considera-se que esta equipe necessita de orientações específicas através de educação continuada sobre o assunto.This investigation was carried out in order to: identify the occurrence of professional accidents with perforate cutting potentially contaminated material among nurses and nursing auxiliaries that work in a general teaching hospital in the interior of the state of São Paulo. The other objectives were: to associate the occurrence of accident with the professional category and period of work; to identify the type of perforate cutting material most involved in accidents, to identily the attitudes taken by the person accidented. The data were collected on individual interview based on a structured formulary in which the following information was registered: the probable reason of accident, how long the professional has been working on such function, the material involved in the accident, the actions taken after the accident. It was evidenced that the Standard Precautions or the Universal Precautions as

  12. The effect of fissures on the strength of structural timber

    Directory of Open Access Journals (Sweden)

    Íñiguez, Guillermo

    2010-06-01

    Full Text Available Detailed measurements of drying fissures were carried out on 28 pieces of gross cross-section structural Scots pine timber. Different parameters have been proposed to measure their magnitude: length, depth, thickness and slope of grain, as well as an index of area in the neutral axis plane (ratio of effective to total surface. The parameters of fissures have been related to bending strength, shear strength, modulus of elasticity and rupture energy obtained from mechanical tests, considering whether rupture is due to bending or shear. All of the fissures observed allows to classify the pieces as MEG according to the UNE 56544 standard. To quantify the magnitude of fissures the index of areas is proposed, while mechanical properties can be quantified by rupture energy. Analysis of the results does not show any relation between the fissures analyzed and the mode of failure, their magnitude and mechanical properties..

    Se han realizado mediciones detalladas de las fendas de secado en 28 piezas de madera de pino silvestre de gran escuadría. Se han propuesto diferentes parámetros para medir su magnitud en longitud, profundidad, grosor e inclinación, así como un índice de áreas en el plano medio de rasante (superficie eficaz respecto a superficie total. Se han relacionado los parámetros de fendas con resistencia a flexión, resistencia a cortante, módulo de elasticidad y energía de rotura obtenidos mediante ensayos mecánicos, teniendo en cuenta si la rotura se produce por flexión o por cortante. Todas las fendas observadas permiten clasificar las piezas como MEG según la norma UNE 56544. Se propone cuantificar las fendas mediante el índice de áreas y las propiedades mecánicas mediante la energía de rotura. El análisis realizado no muestra una relación significativa entre las fendas analizadas, los modos de rotura o las propiedades mecánicas.

  13. MINIMUM BRACING STIFFNESS FOR MULTI-COLUMN SYSTEMS: THEORY

    Directory of Open Access Journals (Sweden)

    J. DARÍO ARISTIZÁBAL-OCHOA

    2011-01-01

    Full Text Available Se propone un metodo que determina la rigidez minima de arrostramiento requeridos por un sistema elastico de varias columnas para lograr condiciones de pandeo sin deriva entre pisos. Las ecuaciones que evaluan la rigidez minima requerida de los arrostramientos laterales y de torsion y la carga critica de pandeo ¡§arriostrada¡¨ correspondiente para cada columna del nivel de piso se obtienen utilizando las funciones de estabilidad modificadas. Se incluyen los siguientes efectos: 1 tipos de conexiones (rigidas, semirrigidas y simples, 2 la distribucion en planta de las columnas (es decir, la orientacion de la seccion transversal y la ubicacion del centro de gravedad de cada columna, 3 deformaciones por cortante a lo largo de cada columna mediante el metodo modificado propuesto por Haringx en 1948, y 4 distribucion de la carga axial entre las columnas (es decir, el patron de carga. Los efectos de las deformaciones axial y de torsion no estan incluidos. El metodo propuesto es aplicable a estructuras 2D y 3D con conexiones rigidas, semirigidas y simple. La formulacion se presenta en este documento se basa en un trabajo previo presentado por Aristizabal-Ochoa en 2007. Se demuestra que la rigidez minima de los arrostramientos laterales y de torsion requeridos por un sistema de varias columnas depende de: 1 la distribucion en planta las columnas; 2 la variacion en altura y propiedades de la seccion transversal de las columnas; 3las rigideces a flexion y a cortante de cada columna; 4 el patron de cargas en el sistema de columnas; 5 la falta de simetria (en el patron de carga, en la disposicion de las columnas, tamanos de las columnas, y sus alturas que hacen que el pandeo combinado de torsion y flexion lateral pueden reducir la capacidad de pandeo critico de la estructura en su conjunto; y 6 las condiciones de apoyo y restricciones en el extremo superior de las columnas. El metodo propuesto se limita a sistemas multi-columna con columnas elasticas y

  14. Johann R. E. Lutjeharms (1944-2011)

    Science.gov (United States)

    de Ruijter, Wilhelmus P. M.; Reason, Chris; Ansorge, Isabelle; Roman, Raymond; Gordon, Arnold L.

    2011-09-01

    Johann R. E. Lutjeharms, South Africa's leading physical oceanographer, died at the age of 67 at his home in Stellenbosch on World Oceans Day, 8 June 2011, after a 10-year battle with a complicated form of cancer. His work was central in the process of enlightening the oceanographic and climate system community to the global importance of the complex, energetic, eddy-rich environment of the Agulhas Current. He aptly referred to this current system, including the transfer of Indian Ocean water into the South Atlantic, as the “Greater Agulhas System.” Johann was born on 13 April 1944 in Bloemfontein, South Africa, where he attended Grey College. At the University of Cape Town (UCT), he completed his bachelor's degree in physics followed by a M.Sc. (cum laude) in oceanography in 1971. His work there led to his first research article (on the variability of the water movement in the southwest Indian Ocean), which appeared in Nature. Many papers would follow, covering a broad range of aspects of the oceans around South Africa. His curriculum vitae lists 177 articles published in peer-reviewed international journals, many of them in AGU's Journal of Geophysical Research (JGR) and Geophysical Research Letters, including his most frequently cited ones.

  15. Variability of the southwest Indian Ocean.

    Science.gov (United States)

    de Ruijter, Wilhelmus P M; Ridderinkhof, Herman; Schouten, Mathijs W

    2005-01-15

    The variability in the southwest Indian Ocean is connected to the basin-scale and global-scale ocean circulation. Two bands of enhanced variability stretch across the Southern Indian Ocean east of Madagascar around 12 degrees S and 25 degrees S, respectively. They mark the preferred routes along which anomalies, generated by varying forcing over the central basin, near the eastern boundary or in the equatorial region, propagate westward as baroclinic Rossby waves. Sea-surface height anomalies pass along the northern tip of Madagascar and are observed by satellite altimetry to propagate into the central Mozambique Channel. There, eddies are subsequently formed that propagate southward into the Agulhas retroflection region. The anomalies along the southern band trigger the formation of large dipolar vortex pairs in the separation region of the East Madagascar Current at the southern tip of the island. South of Africa these eddies and dipoles trigger the shedding of Agulhas Rings that feed the Atlantic meridional overturning circulation with warm, salty, Indian Ocean water. Interannual variability of the forcing over the Indian Ocean, such as that associated with the Indian Ocean Dipole/El Nino climate modes, propagates along these pathways and leads to associated modulations of the eddy transports into the South Atlantic. PMID:15598623

  16. Linfonodos axilares em pacientes com câncer de mama: avaliação ultrassonográfica

    Directory of Open Access Journals (Sweden)

    Denise Joffily Pereira da Costa Pinheiro

    2014-08-01

    Full Text Available O estadiamento axilar nas pacientes portadoras de câncer de mama inicial é fator essencial no planejamento terapêutico. Atualmente este é realizado durante o tratamento cirúrgico, mas há uma tendência em buscar técnicas pré-operatórias e de menor morbidade para avaliação dos linfonodos axilares. A ultrassonografia é um exame amplamente usado para esta finalidade e muitas vezes associado a punção aspirativa por agulha fina ou por agulha grossa. Entretanto, os critérios ultrassonográficos de suspeição para linfonodos axilares não apresentam valores preditivos significativos, gerando resultados discrepantes em estudos sobre sensibilidade e especificidade do método. O objetivo deste trabalho é realizar uma revisão na literatura médica sobre a ultrassonografia no estadiamento axilar e as principais alterações morfológicas do linfonodo metastático.

  17. The Grenvillian Namaqua-Natal fold belt adjacent to the Kaapvaal Craton: 1. Distribution of Mesoproterozoic collisional terranes deduced from results of regional surveys and selected profiles in the western and southern parts of the fold belt

    Science.gov (United States)

    Colliston, W. P.; Schoch, A. E.; Cole, J.

    2014-12-01

    Sixteen tectonic terranes of the Namaqua-Natal metamorphic complex are distinguished (the Aggeneys, Agulhas, Bladgrond, Gamka, Grootdrink, Grünau, Fraserburg, Upington, Margate, Mossel, Mzumbe, Okiep, Olifantshoek, Steinkopf, Pofadder, and Tugela terranes). Evidence obtained from field investigations in the outcrop regions of Namaqualand and Natal are correlated with the geophysical data, enabling recognition of terrane suboutcrops in the regions covered by Phanerozoic deposits in the south. This is illustrated by nine selected profiles over the western and southern parts of the metamorphic complex. Four terranes that have not been observed in outcrop are postulated (Agulhas, Fraserburg, Gamka and Mossel terranes) and may represent extensions of some of the Natal terranes (Mzumbe and Margate terranes). The depth to Moho is generally about 40 km, diminishing dramatically at the present continental edge to as little as 15 km. Listric thrust ramps may originate on rises of the gently undulating topography of the Moho zone. Zones of thrusting and later shearing often exploit older structures and fabrics. The terranes that participated in the Grenvillian Namaqua-Natal Orogeny exhibit a dichotomy of vergences regionally. Those that moved to the northeast and north accreted onto the Archaean Kaapvaal Craton before becoming part of the Kalahari Craton. Terranes with vergences to the south and southwest were amalgamated onto other Archaean cratons. All of the composite cratons took part in the assembly of Rodinia.

  18. A margin transformed: Pure extension to pure translation along the North Falklands Escarpment. Results of Article 76 surveying in the South Atlantic.

    Science.gov (United States)

    Parson, L. M.; Richards, P.; Kimbell, G.; MacLachlan, I.

    2007-12-01

    The Falklands Plateau comprises an elongate continental block extending eastwards from the Falkland Islands to the Maurice Ewing Bank, 900 kilometres away. While complicated by the transpressive convergence of the Scotia Sea Plate in the South, its margin in the north is characterised by the extreme rectilinearity resulting from its transform separation from the South African craton along the Agulhas Plateau/Ridge system. The translational regime is flanked in the west by the well documented seaward dipping reflector sequences dominating the south Argentine margin, but new and extensive swath bathymetric surveying along the escarpment reveals a transition between the two opening modes characterised by a complex of sheared crustal segments, offset zones, and transform discontinuities. Within this 60 km wide margin parallel zone, en echelon arrays of crustal "tears", many defining a crude tension gash geometry, host submarine elevations, which show varying degrees of rotation in response to the increasing development of shear moment toward the east. We examine the tectonic origin of the ridges in the context of the geological evolution of the margin, their connectivity to the margin, and the comparison with the latest data from the conjugate Agulhas margin off South Africa.

  19. Correlation of human epidermal growth factor receptor 2 (HER-2/neu) receptor status with hormone receptors Oestrogen Receptor, Progesterone Receptor status and other prognostic markers in breast cancer: an experience at tertiary care hospital in Karachi

    International Nuclear Information System (INIS)

    Objective: To determine the frequency of human epidermal growth factor receptor 2 (HER-2/neu) positivity and to correlate its status in breast cancer patients with other prognostic markers. Methods: The comparative cross-sectional study was conducted at the Department of Histopathology, Liaquat National Hospital, Karachi, from January 1 to October 31, 2010. It included all specimens of mastectomy and lumpectomy with axillary tissue. Incisional, trucut and wedge biopsies as well as all non-epithelial tumours were excluded. All samples were processed as per standard guidelines and were evaluated by immunohistochemistry. SPSS 10 was used for statistical analysis. Results: The age of the 100 cases in the study ranged from 20 to 82 years with a mean of 51+-17.6 years. Two (2%) of the patients were males. HER-2/neu over-expression increased with increasing tumour size, grade, lymph node metastasis and with oestrogen receptor and progesterone receptor negativity. No significant correlation of HER-2/neu was seen with the age of patient and with the tumour type. Conclusions: The expression of HER-2/neu was associated with decrease in oestrogen receptor and progresterone receptor positivity, and increase in tumour size, high tumour grade and lymph node metastasis. (author)

  20. MRI findings of lumbosacral metastasis from occult follicular thyroid cancer: report of a case.

    Science.gov (United States)

    Çoban, Gökçen; Yildirim, Erkan; Gemici, Kazim; Erinanç, Hilal

    2014-03-01

    A 63-year-old female was admitted to our hospital with bowel and bladder incontinence. Magnetic resonance imaging (MRI) showed a 13 × 12 × 12 cm mass invading the posterior regions of the L4, L5, S1 and S2 vertebrae with broad paravertebral soft tissue invasion. A Tru-cut biopsy of the mass was performed. The histopathological examination revealed metastatic follicular carcinoma of the thyroid. Thyroid functional tests were within the normal limits. Thyroid sonography revealed a heterogeneous, ill-defined, 14 × 9 mm hypoechoic solid nodule in the right lobe of the thyroid gland. On thyroid scintigraphy, an area of focal hyperactivity was detected in the right lobe at the nodule localization. Total thyroidectomy was performed, and the primary tumor pathology was determined to be follicular thyroid cancer. To our knowledge, only a few cases of lumbosacral cord compression as the initial manifestation of follicular thyroid carcinoma have been reported in the literature. We aimed to discuss the MRI findings of tumors in this age group with lumbosacral localization. PMID:23129029

  1. Primary pulmonary synovial sarcoma: A case report and review of literature.

    Science.gov (United States)

    Bhattacharya, Debasis; Datta, Samadarshi; Das, Anirban; Halder, Khokan Chand; Chattopadhyay, Sarbani

    2016-01-01

    Primary pulmonary synovial sarcoma is a very rare, but highly aggressive tumor. Metastatic pulmonary sarcoma due to hematogenous dissemination is much more common. Hence why in any case of pulmonary sarcoma, whole body survey is necessary to exclude a primary tumor elsewhere. No clinical or radiological presentations are specific for pulmonary sarcoma hence; it is often confused with bronchogenic carcinoma. On the other hand, image-guided fine needle aspiration cytology (FNAC) is very much helpful in diagnosis of bronchogenic carcinoma, whereas, it may be inclusive in cases pulmonary sarcomas including primary synovial sarcoma, especially in cases of huge pulmonary masses. So why image-guided tru-cut core biopsy or open lung biopsy and their histopathological examination, supplemented by immunohistochemistry are preferable for the tissue diagnosis of pulmonary synovial sarcoma, although FNAC and immunocytochemistry may be used for the diagnosis. Surgical resection is treatment of choice, if it is not possible, palliative chemotherapy may be an option. Here, we report a rare case of primary synovial sarcoma which occupied almost whole of the right hemithorax in a 60-year-old male farmer. PMID:26958527

  2. cDNA Microarray Analysis of Serially Sampled Cervical Cancer Specimens From Patients Treated With Thermochemoradiotherapy

    International Nuclear Information System (INIS)

    Purpose: To elucidate changes in gene expression after treatment with regional thermochemoradiotherapy in locally advanced squamous cell cervical cancer. Methods and Materials: Tru-Cut biopsy specimens were serially collected from 16 patients. Microarray gene expression levels before and 24 h after the first and second trimodality treatment sessions were compared. Pathway and network analyses were conducted by use of Ingenuity Pathways Analysis (IPA; Ingenuity Systems, Redwood City, CA). Single gene expressions were analyzed by quantitative real-time reverse transcription-polymerase chain reaction. Results: We detected 53 annotated genes that were differentially expressed after trimodality treatment. Central in the three top networks detected by IPA were interferon alfa, interferon beta, and interferon gamma receptor; nuclear factor κB; and tumor necrosis factor, respectively. These genes encode proteins that are important in regulation cell signaling, proliferation, gene expression, and immune stimulation. Biological processes over-represented among the 53 genes were fibrosis, tumorigenesis, and immune response. Conclusions: Microarrays showed minor changes in gene expression after thermochemoradiotherapy in locally advanced cervical cancer. We detected 53 differentially expressed genes, mainly involved in fibrosis, tumorigenesis, and immune response. A limitation with the use of serial biopsy specimens was low quality of ribonucleic acid from tumors that respond to highly effective therapy. Another 'key limitation' is timing of the post-treatment biopsy, because 24 h may be too late to adequately assess the impact of hyperthermia on gene expression.

  3. Estrogen and progesterone hormone receptor status in breast carcinoma: Comparison of immunocytochemistry and immunohistochemistry

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    K Radhika

    2010-01-01

    Full Text Available Context : Estrogen receptors (ER and progesterone receptors (PR play a significant role in the prognosis of breast cancer. For preoperative chemotherapy in locally advanced lesions, trucut biopsy is used to localize the ER and PR receptors by immunohistochemistry. Immunocytochemistry can be a better alternative to immunohistochemistry as it better fixes cells. AIMS : To evaluate the degree of correlation between immunocytochemical (ICC and immunohistochemical (IHC determination of ER and PR in breast cancer. Settings and Design : Fine needle aspiration cytology (FNAC was performed on 100 primary breast cancers immunostained for ER and PR during a period of 1 year 7 months, i.e., from January 2006 to July 2007. Materials and Methods : Papanicolaou-stained slides were destained, fixed in cold acetone and submitted for immunocytochemistry. In the prospective analysis, FNAC smears were straightaway fixed in cold acetone and submitted for ER and PR. Peroxidase, antiperoxidase technique was used for immunocytochemistry. Statistical Analysis : Spearman Rank correlation test was used. Results : Differences between groups were analysed and correlations were studied. Concordance for ER was 50% and for PR was 29%. Both ER and PR were positive in four cases: ER only in three and PR in one, and both were negative in nine cases. Use of the least best buffer and technical errors contributed to the lower ICC rate. Conclusion : Although Immunocytochemistry removes the derogatory step of antigen deterioration, technical errors can cause hindrance in achieving the best of the results.

  4. Mesothelioma with superior vena cava obstruction in young female following short latency of asbestos exposure

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    Anupam Patra

    2015-01-01

    Full Text Available An 18 years female was admitted with right-sided chest pain, dry cough, and low-grade fever and weight loss for last 1 month. On examination, patient had features of superior vena cava (SVC syndrome with right-sided pleural effusion. Chest X-ray showed mediastinal widening with nonhomogenous opacity mainly in the periphery of right upper and mid zone with right-sided pleural effusion. Ultrasonography thorax confirmed mild pleural effusion. Pleural fluid analysis showed lymphocytic, exudative, low adenosine deaminase with negative for Pap smear. Contrast-enhanced computed tomography (CT thorax revealed large extensive nodular soft tissue lesion along right mediastinum as well as costal pleura, with enlarged pretracheal lymphadenopathy and SVC obstruction. CT guided Tru-cut biopsy report came as malignant epithelial tumor with polygonal shape, abundant eosinophilic cytoplasm and nuclei with prominent nucleoli suggestive of mesothelioma of epithelioid type. The tumor cell expressed calretinin, WT-1, and immunonegative for thyroid transcription factor-1.

  5. An Unusual Case of Marginal Zone B-Cell Lymphoma Arising in the Breast - Its Diagnosis and the Role of Radiotherapy in its Management.

    LENUS (Irish Health Repository)

    Rock, Kathy

    2011-10-01

    BACKGROUND: Primary lymphoma of the breast accounts for 0.04-0.5% of all breast malignancies and approximately 1% of all extranodal lymphomas. For stage IE node-negative disease, involved field radiotherapy is recommended except for very young women in whom the risk of breast cancer is a concern. The rate of complete response for limited stage extranodal marginal B-cell lymphoma is in excess of 90%. CASE REPORT: We report the case of a 62-year-old lady who presented with a unilateral painless palpable right breast lump. She subsequently underwent a trucut biopsy of the lesion. The histology revealed a low-grade B-cell non-Hodgkin\\'s lymphoma (NHL). Immunohistochemistry showed that more than 95% of the cells were B cells which were CD 20+\\/CD 45+ and BC L6+. This confirmed the diagnosis of marginal zone lymphoma. Staging work-up was negative for distant metastases. Serum alkaline phosphatase and lactate dehydrogenase were normal. The patient had no \\'B\\' symptoms. Her final diagnosis was clinical stage IAE NHL, and she was referred for curative radiotherapy. CONCLUSION: Radiation treatment is a safe and extremely effective modality of treatment for early stage I marginal zone B-cell lymphomas of the breast.

  6. A Case of Primary Vertebral Osteosarcoma Metastasizing to Pancreas

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    Serhat Avcu

    2009-07-01

    Full Text Available Context Osteosarcoma is the most common malignant bone tumor in children and adolescents and possesses a high potential for metastasis. The most common sites of osteosarcomatous metastases are the lungs, pleurae, and bone; the pancreas being extremely rare. Case report We report the computed tomography findings of a rare case of pancreatic metastasis in a 14-year-old boy with primary vertebral osteosarcoma being followed-up for 6 years. On abdominal CT, a huge mass containing necrotic and calcified areas and causing bone destruction was seen between thoracic vertebra 7 and sacral vertebra 1 involving both the vertebrae and paravertebral soft-tissue. A large metastatic mass with an irregular contour was also visualized in the pancreatic head and peripancreatic region having tomographic findings similar to the vertebral mass. Tru-cut biopsy of the pancreatic mass confirmed the diagnosis of osteosarcoma metastasis. Conclusions Although extremely rare, osteosarcoma metastasis should be included in the differential diagnosis of pancreatic mass lesions, particularly in patients with a primary tumor.

  7. Pneumothorax preceding pulmonary blastoma in a child

    International Nuclear Information System (INIS)

    Serial plain radiographic, ultrasound and CT findings of an unusual case of pulmonary blastoma are described with a review of the literature. Present physical examination revealed a thinly built, mildly anaemic child. Chest radiograph showed a homogeneous opacity in the left lower and mid zones with mediastinal shift to the right side. There was no evidence of a pneumothorax. An ultrasound of the chest revealed a heterogeneous solid mass with a few cystic areas in the left hemithorax causing diaphragmatic inversion. Contrast-enhanced CT thorax showed a mixed density solid and cystic mass measuring 15.3 x 15.0 x 12.2cm, with irregular areas of enhancement. An ultrasound-guided tru-cut biopsy revealed malignant small spindle cells consistent with a pulmonary blastoma. The patient received chemotherapy prior to and following excision of the tumour. At operation, a necrotic tumour was seen arising from the left lower lobe adherent to the pericardium, diaphragm and chest wall. An excision of the tumour and left lobectomy was done. Histopathology confirmed the diagnosis of pulmonary blastoma. Local radiation therapy was given following surgery. Copyright (2001) Blackwell Science Pty Ltd

  8. Atypical focal nodular hyperplasia of the liver

    Institute of Scientific and Technical Information of China (English)

    Muhammad Rizwan Khan; Taimur Saleem; Tanveer Ul Haq; Kanwal Aftab

    2011-01-01

    BACKGROUND: Focal nodular hyperplasia, a benign hepatic tumor, is usually asymptomatic. However, rarely the entity can cause symptoms, mandating intervention. METHOD: We present a case of focal nodular hyperplasia of the liver, which caused a considerable diagnostic dilemma due to its atypical presentation. RESULTS: A 29-year-old woman presented with a 15-year history of a progressively increasing mass in the right upper quadrant which was associated with pain and emesis. Examination showed a firm, mobile mass palpable below the right subcostal margin. A computed tomography scan of the abdomen showed an exophytic mass arising from hepatic segments III and IVb. Trucut biopsy of the hepatic mass was equivocal. Angiography showed a vascular tumor that was supplied by a tortuous branch of the proper hepatic artery. Surgical intervention for removal of the mass was undertaken. Intra-operatively, two large discrete tumors were found and completely resected. Histopathological examination showed features consistent with focal nodular hyperplasia. CONCLUSION: This description of an unusual case of focal nodular hyperplasia of the liver highlights the point that the diagnosis of otherwise benign hepatic tumors may be difficult despite extensive work-up in some cases.

  9. Giant serous microcystic pancreas adenoma

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    Mustafa Kerem

    2012-10-01

    Full Text Available Serous cystadenomas are rare tumors comprising 1-2% of exocrine pancreas tumors. They are mostly known as benign conditions but malign transformation as serous cystadenocarcinoma is also reported. It is usually seen in females. Non-specific symptoms, such as abdominal pain or symptoms due to mass affect, are usually seen. A 64-year old female patient was investigated for abdominal pain. Physical and laboratory findings were normal. Abdomen ultrasonography confirmed an 11x9.5 cm solid cystic lesion and abdomen computed tomography scan confirmed a 12x11 cm lobulated cystic solid lesion which had central cystic necrotic areas extending from liver hilus inferiorly. Fine needle biopsy confirmed benign cytology and trucut biopsy of the pan creatic mass reported chronic inflamation. Nevertheless, this mass could have malignant contents and transformation potential. A laparatomy was decided due to patient’s symptoms and mass effect. Due to vascular invasion of the tumor, Whipple procedure was performed. The pathology report confirmed serous microcystic adenoma. These rare tumors are usually benign but pre-operative malignity criterias are not identified. There are few differential diagnostic tools for excluding malignity. We suggest surgical resection as best treatment approach for selected cases.

  10. Advances in the Management of Upper Gastrointestinal Subepithelial Tumor: Pathologic Diagnosis Using Endoscopy without Endoscopic Ultrasound-Guided Biopsy.

    Science.gov (United States)

    Lee, Hang Lak

    2016-05-01

    Until now, biopsy methods for subepithelial tumors (SETs) have focused on endoscopic ultrasound (EUS)-guided biopsy; however, these methods have several limitations. We devised a simple method for pathologic diagnosis of SETs. SETs are occasionally diagnosed during endoscopy, and lesions are generally small and asymptomatic. It can be challenging to decide on a management plan for large asymptomatic SETs. EUS imaging provides information regarding the size, layer, and echo pattern of the lesions. Patient management plans have traditionally been determined based on EUS images, whereby the endoscopist chooses to either monitor or remove the tumor. However, EUS alone cannot diagnose and evaluate upper gastrointestinal SETs with high accuracy. As sufficient tissue samples are required for the accurate diagnosis of SETs, EUS-guided biopsy techniques such as EUS fine-needle aspiration and trucut biopsy are currently used. However, these methods have a relatively low diagnostic accuracy and do not always provide information upon immunohistochemical staining. Endoscopists can easily detect a submucosal mass after creating an iatrogenic mucosal ulcer, after which tissue sampling is performed by using endoscopic biopsy. Furthermore, pathologic results can differentiate between benign and premalignant lesions. Here, we introduce a simple method for the pathologic diagnosis of SETs. PMID:27246253

  11. Sister Mary Joseph nodule as the presenting sign of disseminated prostate carcinoma

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    Deb Prabal

    2009-01-01

    Full Text Available Sister Mary Joseph′s nodule is referred to as metastasis of visceral malignancy to the umbilicus. Most common primaries are in the gastrointestinal or genital tract, while other locations are rare. We recently encountered a 76-year-old male who was referred to the surgery clinic with an erythematous nodule in the umbilicus measuring 6 cm in diameter with complaints of painless profuse hematuria. History revealed severe obstructive voiding symptoms of 2-year duration, along with significant loss of weight and difficulty in walking. A detailed examination showed hard nodular hepatomegaly, along with grade IV prostatomegaly. Serum prostate-specific antigen was 3069 ng/ml. A pelvic radiograph displayed multiple osteolytic lesions, while ultrasonography showed multiple iso- and hypoechoic lesions in both lobes of the liver, suggestive of metastasis. Histopathology of a Tru-cut biopsy of the prostate confirmed an adenocarcinoma (Gleason score 9 with umbilical metastasis. The patient was on regular follow-up and died 3 months later.

  12. CT-guided large-bore cutting biopsy of diffuse interstitial or alveolar lung disease. Perkutane CT-kontrollierte Schneidbiopsie diffuser interstitieller und alveolaerer Lungenerkrankungen - Technik und Ergebnisse

    Energy Technology Data Exchange (ETDEWEB)

    Klose, K.C. (RWTH Aachen, Klinik fuer Radiologische Diagnostik (Germany)); Biesterfeld, S.; Boecking, A. (RWTH Aachen, Inst. fuer Pathologie (Germany))

    1992-07-01

    Twenty-three patients underwent CT-guided large-bore biopsy of diffuse lung disease of clinically and radiologically indeterminate etiology. The procedure was preceded by negative transbronchial biopsy in 20 cases. CT-guided biopsies were performed with a 14-gauge Trucut-needle. Obtaining at least 3 specimens of different parts of the diseased area, a correct histologic diagnosis was achieved in all cases. The size of the histologic specimens (mean: 5-6 mm) exceeded that of the specimens obtained by transbronchial biopsy as reported in the literature. Two major complications occurred and included a rapidly developing tension pneumothorax treated by a small-bore catheter and one self-limited hemoptysis. Major advantages of percutaneous CT-guided biopsy are the nonsuperimposed and very sensitive imaging of lung alterations in diffuse lung diseases that allows evidence of adjacent less and more involved areas accessible by one biopsy approach. CT-guided large-bore biopsy with a cutting needle seems to be a very promising, accurate method in the pathmorphologic work-up of diffuse lung diseases rendering open biopsy unnecessary in many cases. (orig.).

  13. Usefulness and results of US-guided automated gun biopsy in breast diseases

    Energy Technology Data Exchange (ETDEWEB)

    Lee, Chung Keun; Kim, Chung Hyun; Shin, Kyoung Suk; Kwag, Jin Geun; Han, Se Dong; Cho, June Sik; Kang, Dong Wook [Chungnam National University College of Medicine, Daejeon (Korea, Republic of)

    1994-12-15

    To prospectly evaluate the diagnostic value and clinical usefulness of percutaneous breast biopsy under the US guidance, we performed percutaneous biopsy of 49 breast lesions in 45 patients by using automated biopsy gun that was loaded with an 18-gauze tru-cut needle. Biopsy was performed at two or three different points of the same lesion. Percutaneous biopsy specimens were sufficient for the pathologic diagnosis in 46 (94%) lesions and insufficient in three (6%). Thirty one lesions were proved benign, and 15 lesions malignant at the histologic examination. Of the 36 cases that were followed-up after the operation, the clinical behavior was concordant with the pathologic diagnosis from percutaneous biopsy in 35 lesions (97%). There were no crush artifacts in the percutaneous biopsy specimens. Fragmentation of biopsy specimen was observed in six occasions. However, in five of these six cases, pathologic diagnosis could be made from the damaged specimen. There was no significant complication during and after the procedures. In conclusion, ultrasound-guided biopsy with automated gun biopsy device is an accurate and safe procedure in patients with breast disease

  14. Management in progression of prostatic adenocarcinoma after definitive radiotherapy

    International Nuclear Information System (INIS)

    Follow-up of prostate cancer patients after radical radiotherapy includes clinical examination, periodical measurements of PSA level, bone scan and CT or x-ray examinations. Biochemical progression (3 consecutive results of elevated PSA) does not always equal clinical progression. In all patients with elevated PSA it is necessary to confirm, diagnose or to exclude local progression, which has to be distinguished from systemic progression. All patients should undergo bone scan, chest x-ray and ultrasound of the abdomen. Digital rectal and transrectal ultrasound examinations are vital for local relapse assessment. To confirm local progression (up to 30% of biochemical progressions) rebiopsy (tru-cut) may be performed, but pathological interpretations of findings are difficult due to post-radiotherapy alterations and inflammatory reactions. In selected cases salvage local treatment may be offered after pathological confirmation of the local relapse, although usually patients are offered hormonal therapy only. Because the number of young and fit patients diagnosed with recurrent prostate cancer is increasing some institutions introduce salvage brachytherapy after local failure of radical radiotherapy. The data concerning this management is scant, but promising. (author)

  15. DEFORMATION ANALYSIS OF CONCRETE WALLS UNDER SHAKING TABLE EXCITATIONS

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    JULIAN CARRILLO

    2012-01-01

    Full Text Available El análisis de deformación de elementos estructurales es una herramienta indispensable para investigar la relación fuerza lateral versus deformaciones de cortante, deslizamiento y flexión; evaluar el mecanismo de resistencia del modo de falla, asignar valores adecuados de rigidez lateral, estimar la contribución del acero de refuerzo a las capacidades de resistencia y desplazamiento, calibrar modelos analíticos y, para proponer parámetros apropiados para diseño sísmico basado en desempeño. Para evaluar los componentes de deformación de muros de concreto de baja altura, se llevó a cabo un estudio experimental y analítico. El programa experimental incluyó el ensayo en mesa vibratoria de seis muros de concreto de baja altura. Se recomienda el método y los esquemas de instrumentación que permiten la evaluación adecuada de los tres componentes de deformación de muros cuadrados y con aberturas. Se encontró que el método propuesto produce resultados que son consistentes con los ensayos evaluados.

  16. Deformaciones del acero de refuerzo, durante ensayos en mesa vibratoria con muros de concreto de baja altura

    Directory of Open Access Journals (Sweden)

    Julián Carrillo

    2014-04-01

    Full Text Available Durante las últimas décadas se han identificado varias ventajas de las viviendas con muros de concreto, cuando éstas se comparan con viviendas de mampostería localizadas en zonas de amenaza sísmica alta; por ejemplo, mayor rigidez lateral y resistencia y mayor capacidad de ductilidad. Por lo tanto, la construcción de viviendas de baja altura usando muros de cortante con concreto reforzado se ha convertido en una opción preferida y de esta manera, su uso se ha incrementado considerablemente en muchos países de América Latina. El objetivo de este estudio es evaluar experimentalmente las deformaciones del acero de refuerzo de muros de concreto para vivienda de baja altura sometidos a acciones sísmicas. El programa experimental comprendió seis especímenes de muros de concreto ensayados bajo excitaciones en mesa vibratoria. Se utilizó un factor de eficiencia para reflejar la cantidad de refuerzo del muro en fluencia. Las tendencias de los resultados medidos fueron comparadas con las recomendaciones propuestas por el Reglamento de Construcción ACI 318-11. Los resultados de este estudio pueden utilizarse como una herramienta adecuada para evaluar la contribución del refuerzo a la resistencia y al desplazamiento de muros de concreto reforzado para vivienda de baja altura.

  17. Curva de retención suelo-agua e inicio de monitoreo en Tierra Blanca Joven (TBJ

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    José A. Chávez

    2013-12-01

    Full Text Available En El Salvador durante la época de lluvias o cuando ocurren terremotos, las áreas cubiertas por las tefras volcánicas Tierra Blanca Joven (TBJ sufren movimientos de ladera, licuefacción y erosión provocando pérdidas ambientales, sociales y económicas importantes. Para iniciar la caracterización de estos suelos parcialmente saturados, valores de succión de una unidad de caída de TBJ fueron obtenidos con la olla de presión, centrífuga y papel filtro para construir la Curva de Retención Suelo-Agua. El uso de esta curva en programas de elementos finitos ayuda a conocer los esfuerzos cortantes y la permeabilidad. El papel filtro probó ser un método práctico pero es necesario usar la olla de presión al ir saturándose. Pruebas de campo con tensiómetro (succión y TMS3 (humedad se llevan a cabo para proponer metodología de campo para un sistema de alerta temprana para las laderas, que puede ayudar a la planificación urbana y estudios de riesgo.

  18. Grupo parroquial de Ntra. Sra. De Lourdes, en Roma (Italia

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    Cancellotti, G.

    1966-09-01

    Full Text Available This church group involves the church itself, the parish hall and the priest's house. The external aspect of the buildings, with their highly decorative brickwork, is noteworthy. The interior of the church is impressive in that the congregation, on lifting their eyes to heaven, see around them a very simple, clean structure, without artifice: an environment highly favourable to prayer. The resistant structure is of reinforced concrete, and the pavement has been designed by the painter Adriano Alessandrini.El conjunto Parroquial construido comprende: la iglesia, el salón parroquial, y la casa del párroco. Destacan, en la composición arquitectónica de las fachadas exteriores, el decorativo aparejo que presenta la fábrica de ladrillo. Y en el interior, el logrado propósito de que los fieles, al alzar los ojos al Cielo, puedan contemplar una estructura limpia, serena y sin artificios, que contribuye a crear un ambiente adecuado para la oración. La estructura cortante es de hormigón armado y el diseño del pavimento es obra del pintor Adriano Alessandrini.

  19. Análisis mecánico y tribológico de los recubrimientos fe-cr-ni-c y ni-al-mo

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    JORGE E. MUÑOZ

    2007-01-01

    Full Text Available En este trabajo de investigación se evaluaron dos recubrimientos aplicados por medio de la técnica de rociado térmico por combustión, la aleación: Ni=89%, Al = 5,5%, Mo=5,5% y la aleación Fe=81,8%, Cr=16%, Ni=2%, C=0,2. La preparación superficial de las probetas se realizó usando chorro de arena. Se realizaron pruebas de resistencia al cortante, adherencia, desgaste abrasivo, desgaste por deslizamiento y flexión en cuatro puntos. El recubrimiento Fe-Cr-Ni-C presentó menor pérdida de masa, tanto para desgaste abrasivo como para el desgaste por deslizamiento. La multicapa presentó una mayor porosidad en el recubrimiento Ni-Al- Mo usado como capa base y la capa exterior de Fe-Cr-Ni-C presentó mayor cantidad de partículas no fundidas y óxidos. La falla ocurrida en el ensayo de adherencia para las probetas con recubrimiento multicapa fue de característica adhesiva y cohesiva. El esfuerzo en el que se presenta la fisura por flexión en el recubrimiento multicapa disminuyó con el aumento del espesor

  20. Influência do instrumento de perfuração do orifício piloto nas propriedades mecânicas dos parafusos vertebrais Influencia de la herramienta de perforación del orificio piloto en las propiedades mecánicas de los tornillos vertebrales Effect of the pilot hole perforation tool on mechanical properties of vertebral screws

    Directory of Open Access Journals (Sweden)

    Rodrigo César Rosa

    2011-01-01

    Full Text Available OBJETIVO: Determinar a influência do modo de preparo do orifício piloto utilizando sonda romba, sonda cortante e broca na resistência ao arrancamento dos implantes. MÉTODO: Foram utilizados parafusos do sistema de fixação vertebral (USS com 5 mm, 6 mm e 7 mm de diâmetro externo. Os parafusos foram implantados nos corpos de prova de osso bovino após a realização do orifício piloto com três diferentes modos de preparo: sonda romba, sonda cortante e broca. O diâmetro de perfuração do orifício piloto era menor, igual e maior que o diâmetro interno dos parafusos. No mesmo corpo de prova, três orifícios do mesmo diâmetro foram confeccionados por meio dos três modos de preparo utilizados no estudo, os parafusos foram inseridos e, em seguida, foram realizados os ensaios mecânicos de arrancamento. Os ensaios mecânicos foram realizados em máquina universal de ensaio Emic®, Software Tesc 3.13, célula de carga de 2000N, velocidade de aplicação de força de 2 mm/min, pré-carga de 5N e tempo de acomodação de 10 segundos. A propriedade avaliada nos ensaios mecânicos foi a força máxima de arrancamento. RESULTADOS: O modo de preparo do orifício piloto influencia na resistência ao arrancamento dos implantes de 5 e 6 mm utilizados no estudo. Foi observada maior resistência ao arrancamento os orifícios piloto que foram confeccionados com sonda. A resistência ao arrancamento dos parafusos de 7 mm não foi influenciada pelo modo de preparo do orifício piloto. CONCLUSÃO: O modo de preparo do orifício piloto influenciou a resistência ao arrancamento dos parafusos de 5 e 6 mm de diâmetro externo.OBJETIVO: Determinar la influencia del modo de preparar el orificio piloto por medio de punzón de punta roma, punzón de punta cortante y broca, en la resistencia al arrancamiento de los implantes. MÉTODO: Se utilizó el sistema de tornillos de fijación vertebral (USS, con 5 mm, 6 mm y 7 mm de diámetro exterior. Los tornillos se

  1. Applicability of auriculotherapy in reducing stress and as a coping strategy in nursing professionals Aplicabilidad de la auriculoterapia para reducir estrés y como estrategia de coping en profesionales de enfermería Aplicabilidade da auriculoterapia para reduzir estresse e como estratégia de coping em profissionais de enfermagem

    Directory of Open Access Journals (Sweden)

    Leonice Fumiko Sato Kurebayashi

    2012-10-01

    ó diferencia estadística para el dominio Alejamiento entre los Grupos Aguja/Controle después del tratamiento; y en el análisis dentro del mismo grupo, se lograron diferencias significativas para el dominio Confrontación en la cuarta evaluación entre Grupos Aguja/Controle y para Soporte Social, en la tercera evaluación para los Grupos Aguja/Semillas. CONCLUSIONES:la auriculoterapia con agujas apocó los niveles de estrés significativamente y hubo disminución de la utilización de los dominios Alejamiento, Confrontación y Soporte Social para los grupos de intervención después del tratamiento, sugiriendo que la auriculoterapia tanto con agujas cuanto con semillas puede producir un impacto positivo para mejorar estrategia de Coping en el equipo de Enfermería. Más estudios, sin embargo, se hacen necesarios para que se pueda conocer el alcance de la técnica.OBJETIVOS: trata-se de ensaio clínico randomizado com o objetivo de avaliar a auriculoterapia, para diminuição de níveis de estresse, em 75 profissionais de enfermagem de um hospital e analisar os principais domínios de coping que se modificaram após o tratamento. METODOLOGIA: os sujeitos foram divididos em grupos (controle, agulhas, sementes, receberam 8 sessões nos pontos Shenmen, rim e tronco cerebral. O grupo controle não recebeu nenhuma intervenção. RESULTADOS: constataram-se diferenças significativas pela ANOVA, para níveis de estresse entre o grupo agulha/controle na terceira e quarta avaliações, segundo escores de estresse da Lista de Sintoma de Stress de Vasconcelos. Para o Inventário de Folkman e Lazarus, obteve-se diferença estatística para o domínio afastamento entre os grupos agulha/controle, após tratamento; e, na análise dentro do mesmo grupo, obtiveram-se diferenças significativas para o domínio confronto, na quarta avaliação entre grupos agulha/controle e para suporte social, na terceira avaliação para os grupos agulha/semente. CONCLUSÕES: a auriculoterapia com agulhas

  2. Hematoma subdural intracraniano: uma rara complicação após raquianestesia: relato de caso

    Directory of Open Access Journals (Sweden)

    Flora Margarida Barra Bisinotto

    2012-02-01

    Full Text Available JUSTIFICATIVA E OBJETIVOS: O hematoma subdural intracraniano é uma complicação rara após raquianestesia. O diagnóstico é muitas vezes difícil porque os sintomas iniciais são os mesmos da cefaleia pós-punção da dura-máter. O objetivo é relatar o caso de um hematoma subdural diag nosticado precocemente, após uma raquianestesia realizada com agulha de calibre fino e punção única. RELATO DO CASO: Paciente de 48 anos, ASA I, submetida a raquianestesia para cirurgia de correção de incontinência urinária. Foi realizada a raquianestesia com agulha 27G Quincke e punção única. A cirurgia foi sem intercorrências, e a paciente recebeu alta hospitalar. Após 48 horas da punção raquidiana, a paciente relatou cefaleia de início súbito, de forte intensidade, acometendo principalmente a região orbitária, mas também a região temporal, com melhora importante no decúbito dorsal e acompanhada de dois episódios de vômitos. Foi solicitada tomografia de crânio que revelou a presença de um hematoma subdural agudo frontotemporoparietal esquerdo. Foi indicado tratamento conservador com analgésicos, dexametasoma e hidantoína. Após 17 dias, apresentou quadro de cefaleia intensa, acompanhada de dormência e paresia do membro superior direito, e distúrbio da fala e comportamento. O hematoma foi drenado cirurgicamente. A paciente evoluiu bem sem sequelas. CONCLUSÕES: A cefaleia é a complicação mais frequente após raquianestesia e é considerada de evolução benigna. Faz com que diagnósticos potencialmente fatais, como o hematoma subdural, não sejam feitos em muitos casos, ou sejam tardios. Este caso descreve uma ocorrência rara, um hematoma subdural agudo após uma raquianestesia com agulha fina em uma paciente sem fatores de risco para sangramento

  3. Oceanic dispersal barriers, adaptation and larval retention: an interdisciplinary assessment of potential factors maintaining a phylogeographic break between sister lineages of an African prawn

    Directory of Open Access Journals (Sweden)

    Newman Brent K

    2008-12-01

    Full Text Available Abstract Background Genetic breaks separating regional lineages of marine organisms with potentially high broadcasting abilities are generally attributed either to dispersal barriers such as currents or upwelling, or to behavioural strategies promoting self-recruitment. We investigated whether such patterns could potentially also be explained by adaptations to different environmental conditions by studying two morphologically distinguishable genetic lineages of the estuarine mudprawn Upogebia africana across a biogeographic disjunction in south-eastern Africa. The study area encompasses a transition between temperate and subtropical biotas, where the warm, southward-flowing Agulhas Current is deflected away from the coast, and its inshore edge is characterised by intermittent upwelling. To determine how this phylogeographic break is maintained, we estimated gene flow among populations in the region, tested for isolation by distance as an indication of larval retention, and reared larvae of the temperate and subtropical lineages at a range of different temperatures. Results Of four populations sampled, the two northernmost exclusively included the subtropical lineage, a central population had a mixture of both lineages, and the southernmost estuary had only haplotypes of the temperate lineage. No evidence was found for isolation by distance, and gene flow was bidirectional and of similar magnitude among adjacent populations. In both lineages, the optimum temperature for larval development was at about 23°C, but a clear difference was found at lower temperatures. While larvae of the temperate lineage could complete development at temperatures as low as 12°C, those of the subtropical lineage did not complete development below 17°C. Conclusion The results indicate that both southward dispersal of the subtropical lineage inshore of the Agulhas Current, and its establishment in the temperate province, may be limited primarily by low water

  4. Avaliação de métodos de inoculação de Phytophthora parasitica em plântulas e plantas jovens de citros

    OpenAIRE

    SIVIERO AMAURI; FURTADO EDSON L.; BOAVA LEONARDO P.; BARBASSO DANILO V.; Machado, Marcos A

    2002-01-01

    Este trabalho teve como objetivo avaliar métodos de inoculação de Phytophthoraparasitica em plântulas e plantas jovens de citros (Citrus spp.) visando sua utilização em estudos de resistência de porta-enxertos à gomose de Phytophthora. Os métodos de inoculação testados foram: contato planta sem ferimento-patógeno, casca destacada, inserção de disco de meio de cultura contendo micélio sob a casca, método do disco e inserção de agulha e palito infestados em plântulas e plantas jovens de citros....

  5. Coherent Lagrangian vortices in three-dimensional unsteady flows

    Science.gov (United States)

    Blazevski, Daniel; Haller, George

    2014-05-01

    Detecting barriers to, and facilitators of, transport is a fundamental problem in studying the behavior of Lagrangian trajectories in a fluid. A recent extension of two-dimensional results provides transport barriers in 3D flows as locally most attracting, repelling or shearing surfaces. This provides an objective definition of a Lagrangian vortex boundary as an outermost member of a family of most shearing cylindrical material surfaces. The detection of such a 3D vortex boundary yields an accurate estimate on the volume the vortex transports. We compute 3D Lagrangian vortices in kinematic models, and also use a global circulation model to extract sharp boundaries for coherent three-dimensional Agulhas rings in the South Atlantic.

  6. Upper-level circulation in the South Atlantic Ocean

    Science.gov (United States)

    Peterson, Ray G.; Stramma, Lothar

    In this paper we present a literature survey of the South Atlantic's climate and its oceanic upper-layer circulation and meridional heat transport. The opening section deals with climate and is focused upon those elements having greatest oceanic relevance, i.e., distributions of atmospheric sea level pressure, the wind fields they produce, and the net surface energy fluxes. The various geostrophic currents comprising the upper-level general circulation are then reviewed in a manner organized around the subtropical gyre, beginning off southern Africa with the Agulhas Current Retroflection and then progressing to the Benguela Current, the equatorial current system and circulation in the Angola Basin, the large-scale variability adn interannual warmings at low latitudes, the Brazil Current, the South Atlantic Current, and finally to the Antarctic Circumpolar Current system in which the Falkland (Malvinas) Current is included. A summary of estimates of the meridional heat transport at various latitudes in the South Atlantic ends the survey.

  7. Complicações materno-fetais da biópsia de vilo corial: experiência de um centro especializado do Nordeste do Brasil Fetal and maternal complications of chorionic villus sampling: results from a specialized center in the Northeast of Brazil

    OpenAIRE

    Antonio Carlos Vieira Lopes; Kleber Pimentel; Alessandro de Moura Almeida; Eduardo Costa Matos; Maria Betânia Pereira Toralles

    2007-01-01

    OBJETIVO: avaliar complicações maternas e fetais após realização de biópsia de vilo corial (BVC) para diagnóstico pré-natal de alterações genéticas, na cidade de Salvador (BA). MÉTODOS: série de 958 gestantes de risco para cromossomopatias, submetidas à BVC realizada entre a nona e a 24ª semanas de gestação, por via transabdominal, utilizando agulha espinhal 18G 3½, guiada por ultra-sonografia, entre 1990 e 2006. As variáveis para a análise de complicações imediatas foram cólicas uterinas, he...

  8. Cateteres intravenosos: estudo de condições bacteriológicas e avaliação da assistência de enfermagem

    Directory of Open Access Journals (Sweden)

    Maria Lúcia C. C Robazzi

    1984-03-01

    Full Text Available Embora organizações de saúde Internacionais e autores nacionais tenham emitido há alguns anos diretrizes a serem aplicadas aos cateteres intravenosos, tanto introduzidos através de agulhas como de flebotomias, tem-se observado que estas não têm sido respeitadas. Os autores realizaram estudos junto a pacientes internados em um hospital de Ribeirão Preto, com os objetivos de verificar o tempo de permanência desses cateteres, relacionando-o com suas condições bacteriológicas e dos curativos realizados, avaliando a eficácia da assistência de enfermagem ministrada.

  9. The South Atlantic in the Fine-Resolution Antarctic Model

    Directory of Open Access Journals (Sweden)

    D. P. Stevens

    Full Text Available The geographical area covered by the Fine-Resolution Antarctic Model (FRAM includes that part of the South Atlantic south of 24°S. A description of the dynamics and thermodynamics of this region of the model is presented. Both the mean and eddy fields in the model are in good agreement with reality, although the magnitude of the transients is somewhat reduced. The heat flux is northward and in broad agreement with many other estimates. Agulhas eddies are formed by the model and propagate westward into the Atlantic providing a mechanism for fluxing heat from the Indian Ocean. The confluence of the Brazil and Falkland currents produces a strong front and a large amount of mesoscale activity. In the less stratified regions to the south, topographic steering of the Antarctic circumpolar current is important.

  10. Recruitment and origin of penaeid prawn postlarvae in two South-east African estuaries

    Science.gov (United States)

    Forbes, A. T.; Cyrus, D. P.

    1991-09-01

    Input of postlarval stages into the penaeid prawn stocks of Natal, South Africa, was investigated by monitoring immigration into the St Lucia and Kosi estuaries. Five species, Penaeus japonicus Bate, P. indicus Milne Edwards, P. semisulcatus de Haan, P. monodon Fabricius and Metapenaeus monoceros (Fabricius) were recorded. Recruitment into the more northerly Kosi estuary, where offshore conditions are influenced by the south-flowing Agulhas Current, was totally dominated by P. japonicus. At St Lucia, at the northern end of the Tugela Bank, similar numbers of P. japonicus and P. indicus were recorded as well as smaller numbers of the other three species. The differences imply that the Tugela Bank provides the major postlarval input of commercially important species to St Lucia and suggests a greater degree of isolation of the Natal penaeid prawn populations than previously thought.

  11. Electro-acupuncture reduces the need for additional anesthetics in experimental studies Eletroacupuntura reduz a necessidade de doses adicionais de anestésicos em estudos experimentais

    Directory of Open Access Journals (Sweden)

    Agamenon Honório Silva

    2010-08-01

    Full Text Available PURPOSE: To evaluate the possible beneficial effects of electro-acupuncture in rats subjected to ketamine/xylazine (KX intra-peritoneal (i.p. anesthesia. METHODS: Forty-eight male Wistar rats were distributed in four equal groups. All rats received i.p. injections of ketamine (90 mg/kg +xylazine (10 mg/kg anesthesia. Basal values group (control rats (BV received no additional treatment. The equivalent of the human right ST36 (Zusanli and CV-12(Zhongwan acupoints were chosen for needling and electrical stimulation. AC rats were needled with sterilized disposable stainless steel needles at right ST36 and CV12 acupoints; needles were retained for 30 minutes. EAC10 rats, after needle insertion as described, had electrodes connected to both needles and to an electro stimulator model NKL EL-608; pulsed square waves, 10 Hz, 10 mA, was applied for 30 minutes. EAC100 rats were submitted to EA as described. However, a greater frequency (100 Hz was used. RESULTS: Thirty-seven rats remained under adequate anesthetic level during the experiment. However, maintenance anesthesia was required by 11 rats. Need for additional anesthesia decreased to 9.1% in EAC100 rats compared to BV (36.3%. CONCLUSION: Both the AC and the EAC10/100 prolong the anesthetic effect of the combination Ketamine-xylazine in rats, allowing longer duration of anesthesia with a lower dose of anesthetic, thereby reducing the occurrence of complications.OBJETIVO: Avaliar os possíveis efeitos benéficos da eletroacupuntura em ratos submetidos à anestesia intraperitoneal (i.p. com ketamina / xilazina. MÉTODOS: Quarenta e oito ratos Wistar foram randomizados em quatro grupos iguais. Todos os ratos receberam injeções i.p. de ketamina (90 mg / kg + xilazina (10 mg / kg. Os ratos do grupo Valores Basais (controle - BV não receberam nenhum tratamento adicional. Os acupontos equivalentes aos humanos E-36 (Zusanli e VC-12 (Zhongwan foram escolhidos para inserção de agulhas e estimulação el

  12. DESENVOLVIMENTO DE MODELO DE PERITONITE BACTERIANA PARA AVALIAÇÃO DO TRATAMENTO MEDIANTE ACESSO LAPAROTÔMICO E VIDEO-LAPAROSCÓPICO

    OpenAIRE

    Salgado Jr W.; Cunha FQ; Sankarankuty A.S.; JS Santos

    2001-01-01

    Introdução: O emprego do acesso videolaparoscópico no tratamento das afecções digestivas que cursam com peritonite generalizada é motivo de controvérsia. Objetivo: Desenvolver um modelo de peritonite bacteriana para avaliação do tratamento mediante acesso laparotômico e videolaparoscópico. Métodos: Ratos machos Wistar foram submetidos à ligadura de ceco (CLP) sob molde rígido de 3mm de diâmetro; na seqüência foram feitas 14 punções no ceco com agulha 15X10. Após 6 horas de indução da peritoni...

  13. DESENVOLVIMENTO DE MODELO DE PERITONITE BACTERIANA PARA AVALIAÇÃO DO TRATAMENTO MEDIANTE ACESSO LAPAROTÔMICO E VIDEO-LAPAROSCÓPICO DEVELOPMENT A MODEL OF BACTERIAL PERITONITES FOR THE EVALUATION OF THE TREATMENTS THROUGH LAPAROTOMY AND LAPAROSCOPY

    OpenAIRE

    W. Salgado Jr; Cunha FQ; A.S. Sankarankuty; JS Santos

    2001-01-01

    Introdução: O emprego do acesso videolaparoscópico no tratamento das afecções digestivas que cursam com peritonite generalizada é motivo de controvérsia. Objetivo: Desenvolver um modelo de peritonite bacteriana para avaliação do tratamento mediante acesso laparotômico e videolaparoscópico. Métodos: Ratos machos Wistar foram submetidos à ligadura de ceco (CLP) sob molde rígido de 3mm de diâmetro; na seqüência foram feitas 14 punções no ceco com agulha 15X10. Após 6 horas de indução da peritoni...

  14. Bloqueios nervosos guiados por ultra-som Bloqueos nerviosos guiados por ultrasonido Ultrasound-guided nerve blocks

    OpenAIRE

    Pablo Escovedo Helayel; Diogo Brüggemann da Conceição; Getúlio Rodrigues de Oliveira Filho

    2007-01-01

    JUSTIFICATIVA E OBJETIVOS: As técnicas de bloqueios nervosos guiados por ultra-som são baseadas na visualização direta das estruturas nervosas, da agulha de bloqueio e das estruturas anatômicas adjacentes. Desta maneira, é possível depositar a solução de anestésico local precisamente em torno dos nervos e acompanhar a sua dispersão em tempo real, obtendo-se, assim, um bloqueio mais eficaz, de menor latência, menor dependência de referências anatômicas, menor volume de solução anestésica e mai...

  15. Hemangioendotelioma epitelióide de pleura Epithelioid hemangioendothelioma of the pleura

    OpenAIRE

    Patrícia K. Vitório; Ester M. Coletta; Nelson Morrone; Carlos H. Lima; Guilherme J. Costa; Daniel Inoue; Fabiam B. Hernandes

    2004-01-01

    Relata-se o caso de um paciente exposto profissionalmente a asbesto por dez anos e portador de um tumor pleural muito raro, o hemangioendotelioma epitelióde. O paciente apresentava derrame pleural serohemorrágico, sem evidência de células neoplásicas e com predomínio de linfócitos. A biópsia pleural por agulha revelou processo inflamatório crônico inespecífico, com áreas de tecido mixóide. A videotoracoscopia mostrou nódulos difusos nas pleuras parietal e visceral. A biópsia revelou neoplasia...

  16. Efeitos do sulfato de bário na cavidade pleural de ratos Effects of barium sulphate in rats pleural cavity

    OpenAIRE

    Giovanni Antonio Marsico; Rui Haddad; Carlos Eduardo de Souza Carvalho; Patrícia Gioia de Assis; Ivam Martinelli Júnior; Maria Das Graças Martins

    2001-01-01

    OBJETIVO: Avaliar os efeitos do sulfato de bário na cavidade pleural de ratos. MÉTODO: Foram avaliados, experimentalmente, os efeitos do sulfato de bário a 100% na cavidade pleural de 43 ratos. Sob anestesia inalatória com éter, foi realizada injeção de contraste radiológico (1ml) na cavidade pleural direita após punção com agulha romba pela via subxifóide. Os ratos, divididos em três grupos, foram mortos em câmara fechada com éter, após 24h (13 ratos), 48h (16 ratos) e 21 dias (14 ratos), re...

  17. Acupuntura: bases científicas e aplicações

    OpenAIRE

    Scognamillo-Szabó Márcia Valéria Rizzo; Bechara Gervásio Henrique

    2001-01-01

    A acupuntura visa à terapia e à cura das enfermidades pela aplicação de estímulos através da pele, com a inserção de agulhas em pontos específicos. Essa técnica esteve isolada do mundo ocidental durante milênios, distanciando sua forma de raciocínio e linguagem da cultura ocidental. Isto restringe sua aceitação no Ocidente, sendo considerada mística e sem base científica. Além disso, a prática da acupuntura no Ocidente se depara com deficiências no ensino e difusão científica. Porém, a eficác...

  18. Acupuntura: bases científicas e aplicações Acupunture: scientific basis and applications

    OpenAIRE

    Márcia Valéria Rizzo Scognamillo-Szabó; Gervásio Henrique Bechara

    2001-01-01

    A acupuntura visa à terapia e à cura das enfermidades pela aplicação de estímulos através da pele, com a inserção de agulhas em pontos específicos. Essa técnica esteve isolada do mundo ocidental durante milênios, distanciando sua forma de raciocínio e linguagem da cultura ocidental. Isto restringe sua aceitação no Ocidente, sendo considerada mística e sem base científica. Além disso, a prática da acupuntura no Ocidente se depara com deficiências no ensino e difusão científica. Porém, a eficác...

  19. Síndrome de Munchausen e pseudoparaplegia: relato de caso Syndrome of Munchausen and pseudoparaplegia: case report

    OpenAIRE

    CARLOS ARTEAGA-RODRÍGUEZ; OTTO J. HERNÁNDEZ-FUSTES; LAÉRCIO F. DA SILVA; Luiz R. Aguiar; MARIA A. BRUNO TEIXEIRA

    1999-01-01

    Apresentamos uma paciente com "paraplegia" de oito anos de evolução, que se internou para retirada de agulhas em região lombar e apresentava história de insuficiência renal, câncer de esôfago, ovários e mama, suspeita de tuberculose pulmonar e várias internações em hospitais clínicos e psiquiátricos. No exame psiquiátrico encontramos indiferença à sua doença, prolixidade e descrição detalhada de seus problemas, falando mal dos atendimentos anteriores. Não encontramos evidências de processos n...

  20. Transformação carcinomatosa de endometriose retroperitoneal

    Directory of Open Access Journals (Sweden)

    João Augusto dos Santos Martines

    2012-08-01

    Full Text Available Os autores apresentam o caso de uma paciente de 45 anos de idade, portadora de dor abdominal crônica, sendo evidenciada massa retroperitoneal cuja biopsia por agulha revelou tratar-se de endometriose. Submetida a ooforectomia bilateral. A paciente evoluiu, durante 4 anos, sem controle do quadro álgico, com perda de peso e aumento das dimensões da massa tumoral. A exérese cirúrgica total da massa tumoral não foi possível devido às aderências às estruturas vasculares. O pós-operatóriofoi complicado com quadro séptico evoluindo a óbito. O resultado anatomopatológico fornecido pela autópsia foi de adenocarcinoma de padrão endometrióide.

  1. A description of eddy-mean flow feedbacks in equatorial and boundary current systems of the South Indian Ocean

    Science.gov (United States)

    Aguiar-González, Borja; Ponsoni, Leandro; Maas, Leo R. M.; Ridderinkhof, Herman; van Aken, Hendrik

    2015-04-01

    While many observational and modeling efforts have addressed eddy-mean flow interactions acting over nearly idealized zonal jets, little is know about whether findings in those studies can be extended to current systems with different configurations in the real ocean. This topic is of special interest for ocean-climate models where eddy interactions with the mean flow may be unresolved, demanding further insight on the mechanism by which the eddy field and the mean circulation should feed back in a realistic representation of future climate change scenarios. Following this motivation, we investigate local exchange of momentum and kinetic energy operating in a variety of eddy-mean flow systems of the South Indian Ocean (SIO). To this aim we use 21 years (1993-2013) of newly processed satellite altimetry observations, and adopt a definition of the mean flow as a seasonally-dependent temporal mean where the eddy field encompasses the daily instantaneous deviation from the altimeter-derived velocities. This approach allows time-varying feedbacks to evolve throughout the year. We find that the eddy field feeds back on the mean circulation, contributing importantly to the overall seasonal strengthening and weakening of all current systems involved in the tropical and subtropical gyre of the SIO. Although significant contributions to the momentum and energy balances were also obtained along the Agulhas (Return) Current and the Antarctic Circumpolar Current (ACC), they exhibit a weak/absent seasonal cycle, suggesting that the strength of these dynamical processes is mostly persistent throughout the year. Spatial distribution of the eddy kinetic energy conversion rates and the convergence of horizontal eddy momentum fluxes indicate that over regions where the eddy field draws energy from the mean flow through barotropic instabilities, the current is importantly decelerated by alongstream eddy forces on its upstream side, while further downstream the situation reverses with

  2. Observations of the flow in the Mozambique Channel

    Science.gov (United States)

    de Ruijter, Wilhelmus P. M.; Ridderinkhof, Herman; Lutjeharms, Johann R. E.; Schouten, Mathijs W.; Veth, Cornelis

    2002-05-01

    During a recent research cruise to investigate the nature and continuity of the Mozambique Current, we observed that the flow in the Mozambique Channel is dominated by a train of large anti-cyclonic eddies (diameters >300 km) that reach to the channel bottom and propagate southward. At a frequency of 4 per year they cause a net poleward transport of about 15 Sv (1 Sv = 106 m3/s). In the deep sea, a Mozambique Undercurrent flows equatorward along the continental slope. Using a lowered acoustic Doppler current profiler maximum observed velocities are about 0.2 m/s around 2400 m with another current core around 1000 m. It carries about 5 Sv of intermediate (AAIW) and deep waters (NADW) of Atlantic origin into the Channel. Subsequently, the equatorward flowing AAIW is largely entrained by the eddies and, while mixing with intermediate water from the North Indian Ocean in the eddy core, returned to the Agulhas Retroflection region.

  3. Mean and Seasonal Circulation of the South Indian Ocean Estimated by Combining Satellite Altimetry and Surface Drifter Observations

    Directory of Open Access Journals (Sweden)

    N. Peter Benny

    2014-01-01

    Full Text Available The mean velocity field of south Indian Ocean has been derived by combining high resolution maps of sea level anomalies and the surface drifter data from the Global Drifter program from 1993 to 2012 with a resolution of 1/3 _ 1/3 degrees in latitude and longitude. The estimated mean velocity field exhibits strong western boundary currents, zonal currents and eastern boundary currents. The Agulhas Current shows a velocity of above 1.5 m s-1 at around _ The distribution of energy associated with the fluctuating motion and the mean flow illustrates that mesoscale variability are particularly relevant in the Mozambique Channel, south of Java and around _ Advection of mesoscale features along the western boundary is evident in the distribution of eddy fluxes. The long-term average monthly surface velocity field exhibits large variations in surface currents. The most change is observed in the South Equatorial Current which shows spatial and temporal variations.

  4. Raquianestesia contínua com altas doses de anestésicos locais Raquianestesia continua con altas dosis de anestésicos locales Continuous spinal anesthesia with high dose of local anesthetics

    OpenAIRE

    Luiz Eduardo Imbelloni; Savino Gasparini Neto; Eliana Marisa Ganem

    2010-01-01

    JUSTIFICATIVA E OBJETIVOS: A maior vantagem da raquianestesia contínua é o melhor controle de nível, intensidade e duração da analgesia espinal. Com o advento dos cateteres intermediários (cateter por foral da agulha) e sua baixa incidência de cefaleia e sintomas neurológicos, a técnica vem ganhando credibilidade. O objetivo de caso é relatar a possível segurança do uso do novo cateter com grande dose de bupivacaína hiperbárica a 0,5% com glicose a 1,6% associada à lidocaína 2% hiperbárica co...

  5. Estudos histopatológicos de Colletotrichum spp. em plântulas de cafeeiro Histopathologic study of Colletotrichum spp. in coffee plantlets

    OpenAIRE

    Severina R. O. Lins; Mário S. Abreu; Eduardo Alves

    2007-01-01

    Objetivou-se neste trabalho, acompanhar pela microscopia eletrônica de varredura, os processos de infecção, colonização e reprodução de diferentes isolados de Colletotrichum spp. em plântulas de cafeeiro. Plântulas da cultivar Rubi produzidas por cultura de embrião foram inoculadas com 5µL de suspensão de esporos ajustada para 10(6) conídios mL-1, na região do hipocótilo e folhas, após ferimento com agulha entomológica. Os isolados avaliados foram Colletotrichum gloeosporioides (IH), obtido d...

  6. The Benguela Current: An ecosystem of four components

    Science.gov (United States)

    Hutchings, L.; van der Lingen, C. D.; Shannon, L. J.; Crawford, R. J. M.; Verheye, H. M. S.; Bartholomae, C. H.; van der Plas, A. K.; Louw, D.; Kreiner, A.; Ostrowski, M.; Fidel, Q.; Barlow, R. G.; Lamont, T.; Coetzee, J.; Shillington, F.; Veitch, J.; Currie, J. C.; Monteiro, P. M. S.

    2009-12-01

    sulphur eruptions result from local and remote forcing, restricting the habitat available for pelagic and demersal fish species. The Luderitz-Orange River Cone is an intensive perennial upwelling cell where strong winds, high turbulence and strong offshore transport constitute a partial barrier to epipelagic fish species. Upwelling source water alters in salinity and oxygen, across this boundary zone. A decline in upwelling-favourable winds occurred between 1990 and 2005. The southern Benguela region is characterised by a pulsed, seasonal, wind-driven upwelling at discrete centres and warm Agulhas water offshore. High primary productivity forms a belt of enrichment along the coast, constrained by a front. Low-oxygen water, which only occurs close inshore, may adversely affect some resources. The west coast is primarily a nursery ground for several fish species which spawn on the Agulhas Bank and are transported by alongshore jet currents to the west coast. The Agulhas Bank forms the southern boundary of the Benguela system and it displays characteristics of both an upwelling and a temperate shallow shelf system, with seasonal stratification and mixing, coastal, shelf-edge and dynamic upwelling, moderate productivity and a well oxygenated shelf. A large biomass of fish occupies the Bank during the summer season, with some evidence for tight coupling between trophic levels. A cool ridge of upwelled water, with links to coastal upwelling and to the Agulhas Current, appears to play an important but poorly understood role affecting the distribution and productivity of pelagic fish. A boom in sardine and anchovy populations was accompanied by an eastward shift, followed by 5 years of poor recruitment by sardine but successful recruitment of anchovy, indicating changes in the early life-history patterns of these two species.

  7. Metazooplankton distribution across the Southern Indian Ocean with emphasis on the role of Larvaceans

    DEFF Research Database (Denmark)

    Jaspers, Cornelia; Nielsen, Torkel Gissel; Carstensen, Jacob;

    2009-01-01

    The abundance and depth distribution of metazoans > 20 mu m were investigated at seven stations across the Southern Indian Ocean (SIO), October-November 2006. Copepod nauplii, copepodites and larvaceans dominated the metazooplankton community. Copepodites were most abundant within Agulhas Current...... and Southern Ocean waters, decreasing toward subtropical/tropical areas, whereas larvaceans showed the inverse pattern. The fraction <200 mu m contained the majority of the zooplankton enumerated, including 81, 23 and 93% of the larvacean, copepodite and nauplii abundances, respectively. The relative...... positively correlated to total Chl a (P <0.0001), larvacean biomass was only significantly related to temperature (P = 0.0213). Despite their low biomass, larvacean production was estimated to exceed the copepod production up to five times. It appears that the abundance and role of larvaceans in the SIO has...

  8. Falkland Plateau evolution and a mobile southernmost South America

    Energy Technology Data Exchange (ETDEWEB)

    Barker, P.F. [British Antarctic Survey, Cambridge (United Kingdom)

    1999-07-01

    Assessment of southwest Gondwana break-up and its implications for regional hydrocarbon prospectivity must now take into account the origin of the southeast margin of the Falkland Islands as a volcanic rifted continental margin, and of the floor of the major part of the Falkland Plateau Basin as elevated oceanic crust. A reconstruction of the Falkland Plateau against southern Africa shows a southward extensional widening of the Outeniqua Basin across the line of the Falkland-Agulhas Fracture Zone, changing from stretched continental to oceanic crustal structure. Such a model for Outeniqua Basin opening, and the independent westward and clockwise rotation of the Falkland Islands block, suggests that southernmost South America was also a collection of microplates moving independently within a generally extensional environment in the Late Triassic-Early Jurassic. This is incompatible with assumptions of a rigid southernmost South America over this time, and a dominant role for a continuous dextral strike-slip Gastre Fault.

  9. Hematoma subdural intracraniano: uma rara complicação após raquianestesia: relato de caso

    OpenAIRE

    Flora Margarida Barra Bisinotto; Roberto Alexandre Dezena; Daniel Capucci Fabri; Tania Mara Vilela Abud; Livia Helena Canno

    2012-01-01

    JUSTIFICATIVA E OBJETIVOS: O hematoma subdural intracraniano é uma complicação rara após raquianestesia. O diagnóstico é muitas vezes difícil porque os sintomas iniciais são os mesmos da cefaleia pós-punção da dura-máter. O objetivo é relatar o caso de um hematoma subdural diag nosticado precocemente, após uma raquianestesia realizada com agulha de calibre fino e punção única. RELATO DO CASO: Paciente de 48 anos, ASA I, submetida a raquianestesia para cirurgia de correção de incontinência uri...

  10. Vegetation and vegetation-environment relationships at Grootbos Nature Reserve, Western Cape, South Africa

    Directory of Open Access Journals (Sweden)

    M. Mergili

    2008-12-01

    Full Text Available The private Grootbos Nature Reserve is located at the Western edge of the Agulhas Plain in the Cape Floristic Region of South Africa, an area characterized by high habitat and floristic diversity. The Reserve is covered in near-natural fynbos shrublands with a few patches of forest and wetland. The main objective of this study was to classify the vegetation into discrete units and relate them to the prevailing environmental conditions. The vegetation was analysed by numerical means (TWINSPAN, DC A, CCA and mapped on GIS. At the vegetation type level. Forest & Thicket and Fynbos formed distinctive clusters, whereas the wetland releves were intermixed, but without relationships to one of these units. Fire incidence served as the major determinant of the forest-fynbos boundary. The Forest & Thicket grouping was separated into Thicket (as transitional to fynbos, Afromontane Forest and Milkwood Scrub Forest. Two broad complexes were distinguished within the Fynbos grouping, the Alkaline Sand Fynbos Complex corresponding to Coastal Fynbos. and the Acid Sand Fynbos Complex corresponding to Mountain Fynbos. They discriminated along gradients of pH. soil depth and rock cover. The complexes were further subdivided into formations by using one or a few subjectively chosen dominant species as indicators. The transitions between these formations were rather continuous than discrete. The vegetation type and complex levels correspond well to existing fynbos-wide classifications. Comparing the formations to the results of other vegetation studies is problematic even on the scale of the Agulhas Plain, due to the high regional plant diversity in the Fynbos Biome.

  11. Efeito de diferentes fertilizantes nitrogenados no aumento da produtividade do arroz irrigado Effect of different nitrogen fertilizers on the productivity of flooded rice

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    Norberto Leite

    1970-01-01

    Full Text Available Foi estudado o efeito, na cultura de arroz (Oryza sativa L. irrigado, de diferentes doses e tipos de fertilizantes nitrogenados, bem como a conveniência da construção de diques separando as parcelas. Foram estudados três níveis de nitrogênio e três tipos de fertilizantes, na presença de fósforo e potássio constantes. A variedade utilizada foi a Iguape-agulha. Os dados mostraram grande efeito da adubação nitrogenada, no aumento da produção do arroz. O maior aumento foi apresentado pela torta de mamona, seguida do sulfato de amônio e do nitrocálcio. A presença de diques de separação de canteiros não se mostrou necessária, para evitar a interferência da adubação nitrogenada, em canteiros vizinhos, mesmo utilizando adubos altamente solúveis.A study on the response of flooded rice crops to different kind and doses of nitrogen fertilizers was made. Also the necessity of separating experimental plots with a dike to avoid possible interference among treatments due to solubilization and movement of fertilizers was verified. The experience was carried out at the Experimental Station of Paraíba Valley Service, at Pindamonhangaba, S.P. The fertilizers tested were: castor bean mead, ammonium sulfate and Cal-Nitro in 3 different levels. A constant amount of potassium and phosphorus was applied to all treatments. The rice variety used was Iguape Agulha. Results indicated that there was a significative increase on rice grain production after application of nitrogen fertilizers. Castor bean mead was the most effective in increasing the yield, followed by Ammonium Sulfate and Cal-Nitro. The data also showed that dike construction is unnecessary, because no interference of one treatment on another could be detected.

  12. Controle de infecção: um requisito essencial na prática da acupuntura – revisão de literatura

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    Flaviana Regina Pimenta

    2008-09-01

    Full Text Available A acupuntura é uma técnica milenar de origem chinesa, tem seu uso recomendado pela Organização Mundial da Saúde (OMS e foi incorporada no Sistema Único de Saúde (SUS. Devido sua grande expansão, o objetivo desse estudo foi verificar, por meio de uma revisão bibliográfica, a segurança e o controle de infecção na prática da acupuntura, identificando possíveis riscos e efeitos adversos. A busca do material foi realizada em livros, periódicos on-line (PubMed, MEDLINE, LILACS e SciELO referente aos anos de 1984 a 2007 e manuais sobre acupuntura e controle de infecção. Vários estudos comprovaram que a acupuntura é segura e eficaz, sendo que grande parte de seus efeitos adversos podem ser evitados por profissionais devidamente capacitados e treinados. Um dos principais requisitos para a realização da acupuntura é o controle de infecção, pois é uma técnica invasiva que tem como principal ferramenta o uso de agulhas, que penetram na pele, tecido subcutâneo e músculos, podendo provocar a transmissão de microrganismos. Concluiu-se que desde que todas as normas de biossegurança sejam seguidas, os riscos na prática da acupuntura são mínimos e sempre se preconiza o uso de agulhas descartáveis.

  13. Spreading of the Indonesian Throughflow in the Indian Ocean: Tracer Experiments

    Science.gov (United States)

    Song, Q.; Gordon, A. L.; Visbeck, M.

    2002-12-01

    The Indonesian Throughflow (ITF) spreading pathways and time scales are investigated in two numerical tracer experiments, one being a transit time probability density function (PDF) tracer experiment and the other Lagrangian trajectory experiment, in an ocean general circulation model. The model climatology is in agreement with observations and other model results except within the region of the Leeuwin Current. The thermocline ITF water eventually exits the Indian Ocean along the western boundary, that is, the Mozambique Channel and the east coast of Madagascar and, further south, the Agulhas Current region. Crossing the Indian Ocean within the South Equatorial Current (SEC), the ITF water is affected by the bifurcation at the western boundary, with about 40% flowing southward to join the Agulhas Current consequently exiting the Indian Ocean and the rest about 60% northward to the northern Indian Ocean. Most of the ITF water that turns to the north rejoins the SEC and subsequently is advected to the western boundary by undergoing vertical transfer from the thermocline to the surface layer through upwelling, mainly the summer coastal upwelling off the coast of Somalia and the year-round open ocean upwelling in a broad region between the Equator and about 13°S, and southward horizontal advection in the surface layer by Ekman transport. The fate of this branch of ITF water is determined, again, at the western boundary. The spreading time scales, represented by the elapsed time corresponding to the maximum of transit time PDF, show that in the thermocline the ITF crosses the Indian Ocean, from the Makassar Strait to the east coast of African continent, on a time scale of 9 years, reaches the Arabian Sea on a time scale of 20 years and returns to the eastern Indian Ocean in the southern subtropics on a time scale of 18 years.

  14. Radionuclide tracing of water masses in the Southern Ocean (Indian Sector) - ANTARES IV cruise

    International Nuclear Information System (INIS)

    The study area is located in the Crozet Basin (northwest Kerguelen Plateau and east of Crozet Plateau), where it is featured by the confluence of several fronts, i.e., Agulhas Front (AF), Sub-Tropical Front (STF) and Sub-Antarctic Front (SAF). The most predominant current affecting the circulation in the Crozet Basin is the Agulhas Current (AC) characterized by warm and saline water, extending eastward into the basin. The dominant physical control on biogeochemical distribution is due to the Antarctic Circumpolar Current (ACC). Extending to east of 60 deg E, (ACC) re-circulate to the north, probably as part of an anticyclonic subtropical gyre. Water samples collected during the Antarctic Research Cruise (ANTARES) IV carried out in January-February, 1999, in the Sub-Antarctic Frontal System in the Southern Ocean, were analysed to study the vertical and horizontal distributions of 3H, 90Sr, 239,240Pu and 241Am. Biological samples (plankton and fish) were collected as well. The latitudinal variations of 3H, 90Sr and 239,240Pu indicate that the global fallout is the main source of these radionuclides in the region. However, the main factors controlling the distribution of these radionuclides in surface seawater seemed to be related to the fronts observed in the region. Higher concentrations of 3H, 90Sr and 239,240Pu were found north of AF where warmer and saltier waters were observed, while the concentrations decreased dramatically in the STF and SAF zones, where cooler and less salty waters were observed. A noticeable deeper penetration of 3H in the AF is attributable to the process of Crozet Basin Mode Water formation during wintertime and steady sinking water masses. Higher concentrations of 3H observed in bottom layers in, might be due to intrusion of North Indian Deep Water. Differences in fronts and in radionuclide concentrations in seawater are primary factors in controlling 210Po and 239,240Pu concentrations in zooplankton

  15. Perfil epidemiológico de acidentes com material biológico entre estudantes de medicina em um pronto-socorro cirúrgico

    Directory of Open Access Journals (Sweden)

    Phillipe Geraldo Teixeira de Abreu Reis

    2013-08-01

    Full Text Available OBJETIVO: avaliar os acidentes com material biológico entre estudantes de medicina estagiando em um pronto-socorro de trauma e identificar as principais situações relacionadas, causas atribuídas e prevenção. MÉTODOS: estudo com abordagem quantitativa. Os dados foram coletados através de um questionário, aplicado via internet, contendo perguntas fechadas de escolha múltipla, referentes a acidentes com material biológico. A amostra obtida foi 100 estudantes. RESULTADOS: trinta e dois se acidentaram com materiais biológicos. As atividades de maior risco foram anestesia local (39,47%, sutura (18,42% e recapeamento de agulha (15,79%. As principais vias de exposição ao material biológico foram contato com olho ou mucosa, com 34%, através de seringa com agulha com 45%. Após a contaminação, apenas 52% notificaram o acidente ao setor responsável. CONCLUSÃO: as principais causas de acidente encontradas e vias de exposição podem ser atribuídas a diversos fatores, como falta de treinamento e ao não uso de equipamentos de proteção individual. Ações preventivas e educativas são de extrema importância para diminuir a incidência dos acidentes com materiais biológicos e melhorar a conduta pós-exposição. É preciso entender as principais causas atribuídas e situações relacionadas a fim de implantar medidas gerais e eficazes.

  16. Soft tissue sarcomas in adult patients - guidelines for diagnosis and treatment

    International Nuclear Information System (INIS)

    Significant progress in the treatment of soft tissue sarcoma, both primary tumor and local recurrences/metastatic disease, has been achieved in recent years. Surgery is the essential modality, but the use of combined treatment (standard combination of surgery with adjuvant radiotherapy, chemotherapy in selected cases and perioperative rehabilitation) in highly-experienced centers increased the possibility of cure and limited of extent of local surgery. Current combined therapy and the use of reconstructive methods allows for limb-sparing surgery in a majority of soft tissue sarcoma patients (amputation in only 10% of cases as compared to approximately 50% in the 1960-70s). We also observe a slow, but constant, increase in the rate of soft tissue sarcoma patients who achieve long-term survival. The contemporary 5-year overall survival rate in patients with extremity soft tissue sarcomas is 55%-78%. In case of metastatic disease prognosis is still poor (survivals of approximately 1 year). Good results of local therapy may be expected only after planned (e.g., preceded by preoperative biopsy - tru-cut or incisional) radical surgical excision of the primary tumor with pathologically negative margins (RO resection). After appropriate diagnostic examination, a majority of patients treated with radical surgery, necessitate adjuvant radiotherapy, and long-term rehabilitation, while follow-up examinations performed at the treating institution are necessary for at least 5 years. The progress has been brought on by the introduction of targeted therapy aimed at the molecular or genetic cellidar disturbances detected in the course of studies on the etiopathogenetic mechanisms of sarcoma subtypes. In view of the relative rarity of sarcomas and the necessity of a multidisciplinary approach, the crucial issue is to carry out the management of these tumors only in highly experienced oncological sarcoma centers. (authors)

  17. Lung fibrosis in deceased HIV-infected patients with Pneumocystis pneumonia

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    Erica J Shaddock

    2012-06-01

    Full Text Available Background. Pneumocystis pneumonia (PcP is one of the most common opportunistic infections found in patients with HIV. The prognosis if ventilation is required is poor, with mortality of 36 - 80%. Although more recent studies have shown improved survival, our experience has been that close to 100% of such patients die, and we therefore decided to investigate further. Methods. All patients with confirmed or suspected PcP who died owing to respiratory failure were eligible for the study. Where consent was obtained, trucut lung biopsies were performed post mortem, stored in formalin and sent for histopathological assessment. Results. Twelve adequate lung biopsies were obtained from 1 July 2008 to 28 February 2011 – 3 from men and 9 from women. The mean age was 34.7 years (range 24 - 46, and the mean admission CD4 count was 20.8 (range 1 - 68 cells/μl and median 18.5 cells/μl. All specimens demonstrated typical PcP histopathology; in addition, 9 showed significant interstitial fibrosis. Three had co-infection with cytomegalovirus (CMV, two of which had fibrosis present. There was no evidence of TB or other fungal infections. Conclusion. The high mortality seen in this cohort of PcP patients was due to intractable respiratory failure from interstitial lung fibrosis. whereas the differential includes ventilator induced lung injury, drug resistance or co-infections, we suggest that this is part of the disease progression in certain individuals. Further studies are required to identify interventions that could modify this process and improve outcomes in patients with PcP who require mechanical ventilation. S Afr J HIV Med 2012;13(2:64-67.

  18. Variables affecting the risk of pneumothorax and intrapulmonal hemorrhage in CT-guided transthoracic biopsy

    International Nuclear Information System (INIS)

    The influence of various variables on the rate of pneumothorax and intrapulmonal hemorrhage associated with computed tomography (CT)-guided transthoracic needle biopsy of the lung were evaluated retrospectivly. One hundred and thirty-three patients underwent CT guided biopsy of a pulmonary lesion. Two patients were biopsied twice. Variables analyzed were lesion size, lesion location, number of pleural needle passes, lesion margin, length of intrapulmonal biopsy path and puncture time. Eighteen-gauge (18G) cutting needles (Trucut, Somatex, Teltow, Germany) were used for biopsy. Pneumothorax occured in 23 of 135 biopsies (17%). Chest tube placement was required in three out of 23 cases of pneumothorax (2% of all biopsies). Pneumothorax rate was significantly higher when the lesions were located in the lung parenchyma compared with locations at the pleura or chest wall (P < 0.05), but all pneumothorax cases which required chest tube treatment occured in lesions located less than 2 cm from the pleura. Longer puncture time led to an increase in pneumothorax rate (P < 0.05). Thirty-seven (27%) out of 135 biopsies showed perifocal hemorrhage. Intrapulmonal biopsy paths longer than 4 cm showed significantly higher numbers of perifocal hemorrhage and pneumothorax (P < 0.05). Significantly more hemorrhage occured when the pleura was penetrated twice during the puncture (P < 0.05). Lesion size <4 cm is strongly correlated with higher occurence of perifocal hemorrhage (P < 0.05). Lesion margination showed no significant effect on complication rate. CT-guided biopsy of smaller lesions correlates with a higher bleeding rate. Puncture time should be minimized to reduce pneumothorax rate. Passing the pleura twice significantly increases the risk of hemorrhage. Intrapulmonal biopsy paths longer than 4 cm showed significantly higher numbers of perifocal hemorrhage as well as pneumothorax. (orig.)

  19. The emerging role of endoscopic ultrasound-guided core biopsy for the evaluation of solid pancreatic masses.

    Science.gov (United States)

    Bhutani, M; Koduru, P; Lanke, G; Bruno, M; Maitra, A; Giovannini, M

    2015-06-01

    Pancreatic ductal adenocarcinoma is a lethal cancer with a 5-year survival rate of less than 5%. Surgical resection is the only curative treatment but only 20% are eligible for resection at the time of diagnosis. Early detection of cancer is of paramount importance in the management. Endoscopic ultrasound-guided fine-needle aspiration (EUS-FNA) is the preferred modality for obtaining tissue diagnosis of pancreatic masses. However, the diagnostic accuracy of EUS-FNA may be limited by several factors like availability of onsite cytopathology, adequacy of tissue core for histology, location of the mass, presence of underlying chronic pancreatitis, and experience of the endoscopist. Modern oncology is focusing on personalizing treatment based on tissue analysis of genetic aberrations and molecular biomarkers which are now available. Core tissue also aids in the diagnosis of disease entities like lymphoma, metastatic tumors, neuroendocrine tumors and autoimmune pancreatitis whose diagnosis rely on preserved tissue architecture and immunohistochemistry. Making accurate diagnosis of solid pancreatic masses is critical to avoid unnecessary resections in patients with benign lesions like focal lesions of chronic pancreatitis and autoimmune pancreatitis which mimic cancer. To overcome the limitations of FNA and to obtain adequate core tissue, a Tru-Cut biopsy needle was developed which met with variable success due to stiffness, cumbersome operation and technical failure using it in the duodenum/pancreatic head. More recently fine needle biopsy needles, with reverse bevel technology have become available in different sizes (19, 22, 25-gauge). The aim of this article was to review the emerging role of core biopsy needles in acquiring tissue in solid pancreatic masses and discuss its potential role in personalized medicine. PMID:25675155

  20. Transjugular liver core biopsy: indications, results, and complications

    International Nuclear Information System (INIS)

    Purpose: To evaluate benefit, feasibility, and frequency of complications with transjugular liver biopsy using a semi-automatic Tru-cut system. Materials and Methods: Eighty-five consecutive patients (57 males, 28 females) with various liver disorders (cirrhosis [30], hepatitis [12], acute hepatopathy [34], orthotopic liver transplantation [8], hepatocellular carcinoma [1]), coagulopathies (n=71) and/or ascites (n = 46) were referred to our department for a transjugular liver biopsy. Mean age was 48 ± 16 years (range 17 to 75 years). Success and complications were retrospectively evaluated from the radiology reports, pathology reports, and patient files. Success was defined as procuring a tissue specimen that enabled a definite histological diagnosis. The complications included thrombosis at the puncture site, hematoma, cardiac arrhythmia, capsular perforation, hemorrhage, and cardiac damage. Mortality included all deaths within 30 days after the procedure. Procedure-related mortality included all deaths related to the procedure. Results: The procedure was technically successful in 80 patients (94%) and unsuccessful in 5 patients (6%) due to a failed hepatic vein cannulation (1 patient with Budd Chiari syndrome and total liver vein occlusion, 4 patients with unsuitable anatomy). One biopsy pass was made in 22 patients, and two passes were made in 45 and three or more passes in 14 patients, all in a single session. The sample quality was judged by the pathologist as good in 71 of 80 patients (89%) and poor in 8 patients (10%). A diagnosis was not possible in 1 patient. Eight procedure-related complications occurred, which were classified according to the criteria of the society of interventional radiology (SIR) as minor in 5 (3 type A, 2 type B) and major in 3 (1 pneumothorax, type C, 1 nonfatal bleeding, type D, and 1 fatal bleeding, type F). Procedure-related mortality was 1%, overall mortality 15% (mostly due to progressive liver failure). (orig.)

  1. Needle biopsy of the breast.

    Science.gov (United States)

    Millis, R R

    1984-01-01

    Recently, there has been a considerable increase in the use of both fine-needle aspiration biopsy (aspiration cytology) and tissue-core needle biopsy of the breast. In patients with suspected breast cancer, needle biopsy is frequently used to confirm the diagnosis before treatment is planned. This allows a more thoughtful approach to the patient and full screening for possible metastatic disease prior to definitive surgery. Needle biopsy techniques are simple, rapid, can be performed in the doctor's office, and save time, equipment, and hospital beds. Complications are few. Aspiration cytology has the advantage that it is quick to perform, the preparation can be examined almost immediately and, in the event of an unsatisfactory smear, the procedure can be repeated. However, the diagnosis is based on purely cytological evaluation, and the information obtained is somewhat limited. Reported accuracy rates range from 42 to 96%. False positive reports are rare but have occurred in most centers, and a high degree of accuracy will only be obtained by experienced practitioners. Tissue-core needle biopsy has the advantage that the diagnosis is based on histopathological assessment, but the procedure is slightly more time consuming, is more traumatic for the patient, and the equipment is more expensive. Accuracy rates range from 67 to 98.5%. During the past 4 years, 329 tissue-core (Tru-Cut) biopsies have been performed in the Guy's Hospital Breast Unit, with an accuracy rate of 83% in the diagnosis of carcinoma. The procedure has been acceptable to most patients, and complications have been minimal. Studies comparing the use of aspiration cytology and tissue-core needle biopsy in the diagnosis of mammary carcinoma have produced variable results. Both methods have advantages and disadvantages, and the choice of technique must depend on the clinical situation and the preferences and skills of the practitioners involved in the management of the patient. PMID:6377049

  2. Clinicopathological analysis and outcome of primary mediastinal malignancies - A report of 91 cases from a single institute

    International Nuclear Information System (INIS)

    Primary mediastinal malignancies are uncommon. They can originate from any mediastinal organ or tissue but most commonly arise from thymic, neurogenic, lymphatic, germinal or mesenchymal tissues. The aim of this study was to review the clinical presentations, diagnostic methods adopted, the histologies and the treatment outcomes of this rare subset of tumors. Case records of 91 patients in the period 1993-2006 at our institute were retrospectively analyzed. Patients with primary mediastinal mass and supraclavicular nodes were included for the analysis. Patients with primary, extrathoracic disease of the lung and peripheral adenopathy were excluded. Actuarial method was used for calculating the disease-free survival and overall survival. Primary mediastinal tumors were seen commonly in males with mean age of 37.48 + - 17.04 years. As many as 97% of patients were symptomatic at presentation. Superior venacaval obstruction (SVCO) was seen in 28% of the patients. As many as 50% of the patients were diagnosed by a fine-needle aspiration or Trucut biopsy, while 28% of the patients required thoracotomy for a diagnosis. Majority of the tumors had anterior mediastinal presentation. Pleural effusion was seen in 20% of the patients, but diagnosis was obtained in only 1%. In adults, thymoma (39%), lymphoma (30%) and germ cell tumor (15%) were the common tumors. In the pediatric population, lymphoma, PNET and neuroblastoma were the common tumors. The 5-year DFS and OS are 50% and 55%, respectively. Primary mediastinal tumors are a challenge to the treating physician because of their unique presentation in the form of medical emergencies, like superior venacaval obstruction and stridor. Diagnosis may require invasive procedures like thoracotomy. Treatment and outcome depend on the histologic subtypes. (author)

  3. Evaluation of clinico: Pathologic findings of breast carcinoma in a general hospital in Southern India

    Directory of Open Access Journals (Sweden)

    M Mohapatra

    2013-01-01

    Full Text Available Background and Objectives: Breast cancer is the second most common cancer in the Indian female population. As per our hospital data, breast cancer is also found to be the second leading malignancy in women. Hence, we undertook this study to evaluate the clinical profile, histopathologic types, grade, stage and the prognosis of the disease in our patients. Majority of our patients are from rural areas. Materials and Methods: This study was undertaken over a period of three years comprising of 178 patients who underwent modified radical mastectomy following preliminary diagnosis of carcinoma on fine needle aspiration cytology or histopathological examination of the lumpectomy or trucut biopsy specimens. Clinico-pathological evaluation was done in all of these cases following standard protocols. Result: The study comprised of 175 female patients and 3 male patients in the age range of 28 to 76 years. Majority (111/62.3% of the cases were within the age range of 31-50 years of age with mean age of 48.7 years. Two females had bilateral breast cancer and one female had synchronous papillary serous cystadenocarcinoma of the ovary. Invasive ductal carcinoma no special type was the most common histopathologic pattern, and was seen in 172 (95.5% cases. Most tumors were Scarff Bloom Richardson grade II and American Joint Committee on Cancer pathologic stage II. Prognostically, majority of tumors (49.5% was assessed as ′good′ as per the Nottingham prognostic index score. Conclusions: This study gave an insight to the clinico-pathological profile of breast cancer in our area. Long term study with follow up of the patient is needed for better understanding of the case.

  4. Violência física contra menores de 15 anos: estudo epidemiológico em cidade do sul do Brasil Physical abuse of minors under 15: epidemiological study in a city in the south of Brazil

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    Christine Baccarat de Godoy Martins

    2009-09-01

    Full Text Available OBJETIVO: apresentar o perfil de casos notificados de violência física contra menores de 15 anos em Londrina, Paraná, no ano de 2006. MÉTODO: Estudo transversal, com coleta retrospectiva nos prontuários dos Conselhos Tutelares e serviços de atendimento do município. Os dados foram processados e tabulados pelo programa Epi Info. RESULTADOS: Foram estudados 479 casos de violência por força corporal e 9 casos de violência por outros meios (7 por instrumentos, 1 por objeto cortante e 1 por substância corrosiva. Na violência por força corporal, predominaram vítimas do sexo feminino (53,4% e maior risco na idade de seis anos (12,2 por 1.000. O pai foi o agressor mais frequente (48,8% e o alcoolismo esteve presente em 64,0% dos casos. A violência por instrumentos foi praticada através de cinta (42,9%, fio (28,6%, ferro (14,3% e instrumento de cozinha (14,3%, com vítimas do sexo feminino (85,7%, na faixa etária de doze anos (33,3%, sendo o pai (71,4% e a mãe (28,6% os únicos agressores, com o alcoolismo presente em 57,1% destas situações. A vítima de violência por objeto cortante era do sexo masculino, 13 anos e o agressor, desconhecido, tinha de 15 a 19 anos. A violência por substância corrosiva teve como vítima um adolescente de 13 anos, do sexo masculino, cujo agressor foi o pai, sendo o alcoolismo a situação presente. CONCLUSÕES: Os resultados apontam para a importância epidemiológica do abuso físico contra crianças e adolescentes e podem contribuir para a elaboração de estratégias de prevenção e acompanhamento das vítimas.OBJECTIVES: to build the epidemiological profile of deliberate violence against minors under 15 years of age in Londrina, Paraná in 2006. METHODS: cross-sectional study with retrospective data collected from the records of Tutelary Councils and care services in the city. Data were processed and tabulated with Epi Info software. RESULTS: 479 cases of violence by use of physical force and 9

  5. Risco ocupacional em unidades de Suporte Básico e Avançado de Vida em Emergências Riesgo laboral en las Unidades de Soporte Básico y Avanzado de Vida en Emergencia Occupational risk in Basic and Advanced Emergency Life Support Units

    Directory of Open Access Journals (Sweden)

    Amanda dos Santos Zapparoli

    2006-02-01

    Full Text Available O estudo objetivou identificar os fatores de risco ocupacional a que estão expostos os profissionais da equipe das Unidades de Suporte Básico e Avançado de Vida em Emergências. Utilizou-se a técnica de entrevista semi-estruturada para coleta dos dados. Constituíram-se sujeitos do estudo 40 trabalhadores de duas equipes do Sistema de Atendimento Médico a Urgência de uma cidade do interior do Estado de São Paulo. Os fatores de risco identificados pela maioria dos trabalhadores foram: físicos (elevados níveis de temperatura e ruído ambiental; químicos (manipulação de substâncias químicas; biológicos (exposição a microorganismos e falta de materiais disponíveis. Os riscos peculiares à atividade foram: risco de ocorrência de acidentes automobilísticos (90% dos trabalhadores, agressões física e moral (90% dos trabalhadores e acidentes com material pérfuro-cortante (72,5% dos trabalhadores. A violência foi descrita por 75 % dos trabalhadores como fator de risco mais preocupante no trabalho. A maioria dos trabalhadores identificou os riscos ocupacionais. No entanto, a minoria utiliza medidas adequadas de segurança, revelando a necessidade de intervenções.Este estudio se realizó con el objetivo de identificar los factores de riesgo laboral a los que están expuestos los profesionales del equipo de las Unidades de Soporte Básico y Avanzado de Vida en Emergencias. Se utilizó la entrevista semiestructurada. Los sujetos de estudio fueron 40 trabajadores componentes de dos equipos del Sistema de Atención Médica de Urgencia de una ciudad del interior de São Paulo-Brasil. Los factores de riesgo identificados por la mayoría de los trabajadores fueron: físicos (elevados niveles de temperatura y ruido ambiental; químicos (manipulación de substancias químicas; biológicos (exposición a microorganismos y falta de materiales disponibles. Los riesgos peculiares a la actividad fueron: riesgo de ocurrencia de accidentes

  6. Resíduos potencialmente infectantes em serviços de hemoterapia e as interfaces com as doenças infecciosas Residuos potencialmente infectivos en servicios de hemoterapia y las interfaces con las enfermedades infecciosas Potentially infectious residues at hemotherapy services and interfaces with infectious diseases

    Directory of Open Access Journals (Sweden)

    Marinésia Aparecida do Prado

    2004-12-01

    Full Text Available Objetivou-se identificar o processamento de resíduos potencialmente infectantes e de perfurocortantes em unidades de hemoterapia e sua possível relação com a saúde dos trabalhadores. Nenhum serviço apresentou plano estruturado para o gerenciamento de resíduos de serviços de saúde e para o programa de segurança ocupacional. Verificou-se um índice de acidentes ocupacionais de 32, 82 % e que 9,16% dos trabalhadores estavam com esquema incompleto de vacinação contra hepatite B. Os treinamentos em serviços para manejo de resíduos e saúde ocupacional não são padronizados. O índice de soroconversão para VHB e VHC após exposição ocupacional foi de 11,63%. Concluímos que o processamento de resíduos potencialmente infectantes e perfurocortantes nas unidades de hemoterapias pesquisadas tem exposto os trabalhadores à aquisição de doenças infecciosas.La finalidad fue la de identificar el procesamiento de residuos potencialmente infectivos, cortantes y punzantes en unidades de hemoterapia y su posible relación con la salud de los trabajadores. Ningún servicio presentó plan estructurado para la gestión de residuos de servicios de salud y para el programa de seguridad ocupacional. Se observó un índice de accidentes ocupacionales de 32,82 % y que 9,16% de los trabajadores estaban con plan incompleto de vacunación contra hepatitis B. La capacitación en servicios para manejo de residuos y salud ocupacional no está estandardizada. El índice de seroconversión para VHB y VHC tras exposición ocupacional fue de 11,63%. Concluimos que el procesamiento de residuos potencialmente infectivos, cortantes y punzantes en las unidades de hemoterapia investigadas ha expuesto a los trabajadores a la adquisición de enfermedades infecciosas.The aim was to identify the processing of potentially infectious residues and of piercing and cutting residues at hemotherapy units and their possible relation with workers' health. No service presented

  7. Avaliação in vitro da força de união, através de teste de tração, de porcelana feldspática com diversos tratamentos superficiais à resina composta In vitro evaluation of the bonding strength of the composite resin to feldspathic porcelain with several surface treatments, applying a tensile strength test

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    Américo Mendes CARNEIRO JUNIOR

    1999-07-01

    Full Text Available Na busca da reprodução do aspecto dental, a porcelana se destaca entre os materiais restauradores. Desse modo, a utilização do material vem atualmente crescendo cada vez mais, e, com ela, a probabilidade de fraturas. Porém, uma falha nem sempre exige a troca da restauração: existe a possibilidade de um reparo com resina composta. Este trabalho se propôs a avaliar, in vitro, a força de união da resina composta à porcelana feldspática, quando efetuados os seguintes tratamentos superficiais na porcelana: asperização com instrumento cortante rotatório diamantado ou jateamento com óxido de alumínio de 50 micra, em aplicação isolada ou associada a condicionamento com ácido fosfórico, por 15 segundos, ou com ácido fluorídrico, por 1 ou por 4 minutos. Todos os espécimes foram previamente regularizados com lixa nº 220. Após os tratamentos superficiais, receberam o sistema de união adesivo para porcelana Scotchbond Multi-Purpose Plus Dental Adhesive System (3M. Feita a união com a resina composta (Restaurador Z100, 3M, foram armazenados em água destilada a 37ºC, em estufa, por 7 dias, e termociclados (600 ciclos de 1 minuto, entre 5 e 55ºC, sendo então submetidos a teste de tração. Pelos resultados obtidos, pôde-se concluir que ocorreu melhora na resistência à tração com todos os tratamentos propostos (em comparação ao observado no grupo controle, sem nenhum tratamento superficial. O jateamento produziu maior resistência de união que a asperização com instrumento cortante rotatório diamantado; mas, quando associados ao condicionamento com qualquer dos ácidos selecionados, independente do tempo de aplicação, não houve diferença estatística entre esses tratamentos.In the search for the recovery of the dental aspect, the porcelain stands out among restoring materials. The use of this material has increased considerably over the last years, therefore increasing the probability of fractures. Even so, not

  8. Escenarios climáticos para temporadas con alto y bajo número de huracanes en el Atlántico

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    Eric J. Alfaro

    2007-06-01

    Full Text Available Se estudió la relación entre la variación de la actividad anual de los ciclones tropicales en el Atlántico y las variaciones decadales e interanuales de la Temperatura Superficial del Mar (TSM. Utilizando el análisis de tabla de contingencia se asignaron las probabilidades condicionales para los escenarios bajo, dentro y arriba de lo normal en la actividad anual de los ciclones tropicales dado un escenario bajo, dentro y arriba de lo normal en distintos índices de TSM para el periodo 1944-2004 (61 años. La actividad anual de los ciclones se estudió en función de la comparación normalizada de la TSM en el Atlántico y el Pacífico tropical. Se observó que años con pocos huracanes estaban acompañados de condiciones más frías (cálidas que el promedio en el Atlántico Tropical Norte (Pacífico Ecuatorial del Este, una mayor cortante vertical del viento en el Atlántico Tropical Norte pero menor en el Pacífico Ecuatorial del Este cerca de Centroamérica y una presión media a nivel del mar mayor (menor en el Atlántico Tropical Norte (Pacífico Ecuatorial del Este. Años con una alta actividad de huracanes mostraron, en términos generales, patrones opuestos en el campo de las anomalías a los descritos anteriormente para las regiones estudiadas.

  9. Mechanical Properties of Concrete for Low-Cost Housing

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    Alcocer Sergio M.

    2013-04-01

    Full Text Available La resistencia a cortante de muros de concreto y los nuevos materiales y técnicas de construcción han posicionado a la vivienda industrializada de concreto como una opción eficiente para proporcionar seguridad ante eventos sísmicos, para incentivar la conservación del medio ambiente y para promover la reducción de los costos de construcción, operación y mantenimiento. Con el propósito de desarrollar ayudas de diseño que promuevan la utilización de diferentes tipos de concreto, se llevó a cabo un estudio experimental para caracterizar las propiedades mecánicas de los concretos de peso normal, peso ligero y autocompactable. El programa experimental incluyó el ensayo de 603 especímenes en forma de cilindros y vigas. En el estudio se determinaron las propiedades mecánicas de los tres tipos de concreto sometidos a esfuerzos de compresión, tensión y flexión. A partir de las tendencias de los resultados experimentales, se proponen correlaciones numéricas para estimar las propiedades mecánicas básicas de los concretos, tales como módulo de elasticidad, resistencia a tensión indirecta y resistencia a flexión. Adicionalmente, en el estudio se proponen recomendaciones respecto a la resistencia mínima a compresión del concreto para vivienda y a la edad de descimbrado de los muros. Las recomendaciones de este estudio se podrían implantar fácilmente en un reglamento para construcción de vivienda de baja altura y de bajo costo.

  10. Empowerment como forma de prevenção de problemas de saúde em trabalhadores de abatedouros Empowerment as a way to prevent work-related health conditions in slaughterhouse workers

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    Paula Tavolaro

    2007-04-01

    Full Text Available O objetivo do artigo foi ressaltar a necessidade de esforços educativos que visem ao empowerment de funcionários de abatedouros, baseado nos principais problemas de saúde por eles enfrentados. A rotina em abatedouros consiste em tarefas estressantes e cansativas. As conseqüências incluem problemas músculo-esqueléticos, transmissão de zoonoses, problemas de pele e acidentes com materiais pérfuro-cortantes e animais. Esses trabalhadores geralmente não são especializados, não têm controle sobre suas tarefas, e podem não estar conscientes dos determinantes que afetam sua saúde. Os veterinários são geralmente responsáveis pela rotina de trabalho nesses locais e conhecem os riscos à saúde que a execução dessas tarefas representam. Portanto, esses profissionais poderiam participar mais ativamente na educação para o empowerment dos trabalhadores e não se concentrarem apenas em questões referentes à segurança alimentar.The objective of the review was to emphasize the need for educational efforts aiming at the empowerment of slaughterhouse workers based on their major work-related conditions. Slaughterhouse work involves stressful and tiring tasks. These workers suffer from serious occupational injuries and health problems including musculoskeletal disorders, zoonoses, skin conditions and injuries related to animals and sharp instruments. Slaughterhouse workers are generally low-skill staff, have no control over their job tasks and may not be aware of the determinants affecting their health. While working for the Brazilian Ministry of Agriculture, veterinarians are greatly responsible for the work routine in slaughterhouses and are aware of health risks involved in these workers' job. Besides focusing their activities on food safety, veterinarians they should take an active role in educating slaughterhouse workers for their empowerment.

  11. Caracterización de laGuadua Angustifolia Kunth cultivada en Miraflores (Boyacá de acuerdo con la NSR-10

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    Luis Alfredo Cely Moreno

    2013-01-01

    Full Text Available La guadua es un material renovable, con características físicas, químicas y mecánicas extraordinarias; por ser un elemento natural, extrae sus nutrientes del suelo de cultivo. Se realizaron una serie de pruebas a la planta para determinar ciertos rasgos innatos de la guadua cultivada en el municipio de Miraflores (Boyacá. Además, se tomaron en cuenta los parámetros ambientales ideales del eje cafetero, y se compararon con los de la zona de estudio, con el fin de observar las diferencias entre los dos. Respecto a los ensayos practicados a la guadua se siguieron los lineamentos propuestos en la Norma Técnica Colombiana NTC 5525 y el Reglamento sismo resistente de Colombia NSR-10 Título G. Los ensayos realizados fueron Físicos (Humedad y Densidad en secciones Cepa, Basa y Sobrebasa y Mecánicos (Compresión paralela a la fibra, Tensión paralela a la fibra, Cortante paralelo a la fibra, Flexión estática con cuatro puntos de aplicación de la carga y Módulos de elasticidad a Compresión, Tensión y Flexión obtenidos de forma directa e indirecta. Yse determinó que la guadua es apta para ser utilizada como material de construcciones sismorresistentes, debido a que cumple con los valores de esfuerzos admisibles propuestos en la normatividad colombiana.

  12. Study of the cracking of sandwich panels of plasterboard and rockwool

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    Alonso, J. A.

    2013-09-01

    Full Text Available This paper presents the study of plasterboard and rockwool sandwich panels cracking under flexural loading. These panels are usually used to perform interior partition walls and they frequently show cracking pathology due to excessive deflexion of the slabs. There are currently no reliable simulation models and experimental data for the study of this problem. This paper presents the results of an experimental campaign aimed to characterize the fracture behaviour of sandwich panels and their individual components. In addition, the paper presents a cohesive model with embedded crack to simulate the fracture behaviour of the panel. Finally we present the results of tests for mixed mode fracture (tensile / shear commercial panels and their behaviour is reproduced with the cohesive model proposed, yielding a good fit.Este artículo presenta el estudio de la rotura de paneles sándwich de yeso laminado y lana de roca bajo solicitaciones de flexo-tracción dentro de su plano. Estos paneles se emplean para conformar tabiques interiores de edificación y con frecuencia se fisuran por flechas excesivas en los forjados. Actualmente no hay modelos de cálculo fiables ni datos experimentales que permitan estudiar este problema. Este trabajo presenta los resultados de una campaña experimental encaminada a caracterizar el comportamiento en rotura de los paneles sándwich y de sus componentes individuales. Además, se presenta un modelo cohesivo con fisura embebida que permite simular el comportamiento en rotura del panel sándwich conjunto. Por último se presentan los resultados de los ensayos de fractura en modo mixto (tracción/cortante de paneles comerciales y se reproduce su comportamiento con el modelo cohesivo propuesto, obteniéndose un buen ajuste.

  13. Caracterização de crianças e adolescentes atendidos por maus tratos em um hospital de emergência no município de Fortaleza-CE Characterization of maltreated children and adolescents taken into a paediatric emergency health care service in Fortaleza-CE-Brazil

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    Arcelina Maria da Silva

    2001-03-01

    Full Text Available O estudo teve como objetivo caracterizar o perfil da criança e adolescente maltratados e atendidos em um hospital de emergência, no Município de Fortaleza, Ceará. Utilizou-se a pesquisa documental retrospectiva com análise dos formulários da Comissão de Maus Tratos à Infância e Adolescência. Os resultados revelaram que o sexo masculino e a faixa etária de 1 a 5 anos foram os mais atingidos; o principal agressor é o pai biológico e os tipos de violência mais freqüentes foram o hematoma, o abuso sexual e as lesões por objetos cortantes. Conclui-se que o tema requer estudos aprofundados que modifiquem o ambiente em que a criança, adolescente e famílias estão inseridos.This study aimed to characterise the profile of the child and the adolescent who were maltreated and taken into paediatric emergency care in a hospital, in Fortaleza, Ceará. It was used a documented retrospective evaluation. The results showed that the children in the age group of 1-5 years were the most victimised as well as the children of the male sex. The main perpetrator was a biological father and the most frequent kind of violence were hematomas, sexual abuse and wounds by slashing objects. In conclusion, this subject needs to be more investigated for providing changes within the' environment where a child, adolescent and families were inserted.

  14. Estudio de corte de películas plásticas sobre suelos acolchados

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    César Gutiérrez Vaca

    2010-01-01

    Full Text Available En el estudio se determina la energía requerida para el corte de film plástico que se utiliza en suelos acolchados, el perfil adecuado de cuchilla, y profundidad óptima de corte, parámetros que servirán para el diseño del elemento cortante de una trasplantadora. Se ensayaron dos tipos de plásticos con grosor de 30 y 23 ¿m, respectivamente, cuatro diferentes bordes de cuchilla; del tipo liso y dentado, dos diferentes suelos; arcilloso y arenoso, y dos velocidades de cuchilla; 1 mm·s-1 y 10 mm·s-1. Se colocó suelo dentro de una bandeja y sobre él la probeta de plástico. La cuchilla se sujeta en el brazo de un equipo de análisis de textura, Microsystems TaxT2, y al desplazarse corta el plástico. Se genera así información de fuerza y deformación que se envía al programa xtrad dimension del texturómetro, obteniéndose dichos parámetros. De esa información se integra la energía unitaria (J·mm-1 que se precisa exclusivamente para el corte de plástico. Las cuchillas con bordes dentados muestran mejor desempeño, y son el factor fundamental a considerar al momento del diseño, ya que las variables de plástico, suelo y velocidad muestran poca influencia en el fenómeno.

  15. Un estudio histórico del problema de las piezas prismáticas rectas sometidas a compresión. Parte I

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    de la Rosa, Emilio

    2007-09-01

    Full Text Available This article presents a historical overview of the key questions that have marked the evolution of the study of straight prismatic elements subjected to compression loads. Straight prismatic elements are researched considering the practical problems on the basis of which models and the theory explaining their behaviour have been developed.The problems that give rise to the origin of the theory of the beam-column are reviewed in the fi rst section (buckling loads and stability and their subsequent developments: imperfections, large deformations, shear deformation and asymmetries. On the other hand, new problems in relationship to the behavior of the material (plasticity, rheology and its three dimensional nature are considered. Finally, the application of fracture and damage theory to the study of the behaviour of the columns is mentioned.En el presente artículo se recogen, desde una perspectiva histórica, las cuestiones básicas que han marcado la evolución del estudio de piezas prismáticas rectas sometidas a compresión. Dicho estudio se lleva a cabo considerando los problemas prácticos en relación con los cuales se han desarrollado tanto los modelos como la teoría que explica su comportamiento.En un primer apartado se recogen los primeros problemas que dan origen al nacimiento de la teoría de la viga-columna (cargas de pandeo y estabilidad y sus posteriores desarrollos: imperfecciones, grandes deformaciones, deformación por cortante y asimetrías. Por otra parte se recogen nuevos problemas en relación con el comportamiento de los materiales (plasticidad, reología y su carácter tridimensional. Por último se menciona la aplicación de la teoría de la fractura y daño al estudio del comportamiento de los pilares.

  16. INFLUÊNCIA DE DIFERENTES TIPOS DE ELETRODOS SOBRE OS VALORES DA BIOIMPEDÂNCIA CORPORAL E NA ESTIMATIVA DE MASSA MAGRA (MM EM GATOS ADULTOS INFLUENCE OF DIFFERENT TYPES OF ELECTRODES ON THE BIOELECTRICAL IMPEDANCE VALUES AND IN THE ESTIMATION OF LEAN BODY MASS (LBM IN ADULT CATS

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    Thassila Caccia Feragi Cintra

    2010-04-01

    Full Text Available A bioimpedância (BIC é um método que aplica à tecnologia da impedância no estudo da composição corporal pela avaliação da diferença da condutividade elétrica dos tecidos. Os resultados da BIC são expressos pelas medidas primárias de resistência (R e reatância (Xc. Neste experimento, o método foi desenvolvido para verificar a viabilidade do uso de três diferentes tipos de eletrodos sobre a reprodutibilidade dos valores de R e Xc em gatos adultos. As médias de R e Xc com adesivos e agulhas de acupuntura não diferiram entre si (p?0,05, e os menores valores dos coeficientes de variação obtidos com estes eletrodos sinalizaram para uma melhor reprodutibilidade dos resultados quando comparados com os da agulha hipodérmica. Os diferentes tipos de eletrodos não interferiram nos valores da massa magra (MM estimada por equação específica, porém a agulha de acupuntura mostrou ser o eletrodo mais estável e de melhor aplicabilidade. A MM determinada com os diferentes tipos de eletrodos foi superior (p?0,05 à obtida com a absorciometria de raios-x de dupla energia (DEXA, provavelmente decorrente da equação utilizada na sua estimativa.

    PALAVRAS-CHAVES: Composição corporal, felinos, impedância, massa magra.
    The bioelectrical impedance is a method that applies impedance technology in the study of physical composition by evaluation of electrical conductivity difference on each organism tissue. The results of bioelectrical impedance (BIC are expressed by the resistance (R and reactance (Xc primary measures. This study was carried out to verify the viability of the use of three different electrodes on the repeatability of R and Xc values in adult cats. The averages of R and Xc estimated by adhesive and acupuncture needles did not differ from each other (p?0.05 and the smaller values of the variation coefficient acquired with these electrodes signaled for a better reproducibility of the results when compared with

  17. Flow at intermediate depths around Madagascar based on ALACE float trajectories

    Science.gov (United States)

    Chapman, P.; Marco, S. F. Di; Davis, R. E.; Coward, A. C.

    2003-07-01

    During 1994-1996, 215 Autonomous Lagrangian Circulation Explorers (ALACE floats) were released at a nominal 900 m depth in the Indian Ocean as part of the World Ocean Circulation Experiment. Of these, 66 entered the region around Madagascar (2-30°S, 35-55°E), generally at a depth of 800-900 m. Floats approaching the island from the east were deflected either northward or southward depending on latitude, with the bifurcation point being near 20°S. Mean southward velocities in the western boundary current were 8.5 cm s -1 during each 25-day observation period, with mean northward velocities 7.7 cm s -1. Speeds past Cape Amber were about 11 cm s -1. These figures are comparable to those obtained from in situ current meter measurements. Floats rounding the island to the north frequently drifted north of the Comores for many months with no discernable pattern, before exiting the region either to the north in the East African Coastal Current and the equatorial current system or to the south via the Mozambique Channel. Flow rates in this region were highly skewed towards low (less than 5 cm s -1) velocities. Floats passing south of Madagascar showed little northward movement into the Mozambique Channel, but tended to move steadily westwards towards the African coast, becoming entrained in the Agulhas Current and its recirculation gyres near 28°S. Similarly, floats released within the southern portion of the Channel all tended to move to the south and west despite occasional entanglement with eddies. Mean flow in the Agulhas region was about 18 cm s -1, with maximum velocities over 25 days of up to about 35 cm s. All flows were extremely variable because of the ubiquity of eddies. In essence, the flow observed near 800 m resembled closely that seen at the surface from TOPEX/POSEIDON altimetry and at 845 m in the OCCAM global model. Temperature data collected by the floats were used to determine when a given float was being acted on by an anticyclonic eddy. Deviations

  18. Biópsia percutânea de lesões ósseas guiada por tomografia computadorizada: taxas de definição diagnóstica e complicações

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    Macello Jose Sampaio Maciel

    2014-10-01

    Full Text Available Objetivo: Determinar taxas de definição diagnóstica e complicações da biópsia percutânea guiada por tomografia computadorizada (TC de lesões ósseas suspeitas de malignidade. Materiais e Métodos: Estudo retrospectivo que incluiu 186 casos de biópsia percutânea guiada por TC de lesões ósseas no período de janeiro de 2010 a dezembro de 2012. Todas as amostras foram obtidas usando agulhas de 8 a 10 gauge. Foram coletados dados demográficos, história de neoplasia maligna prévia, dados relacionados à lesão, ao procedimento e ao resultado histológico. Resultados: A maioria dos pacientes era do sexo feminino (57% e a idade média foi 53,0 ± 16,4 anos. Em 139 casos (74,6% a suspeita diagnóstica era metástase e os tumores primários mais comuns foram de mama (32,1% e próstata (11,8%. Os ossos mais envolvidos foram coluna vertebral (36,0%, bacia (32,8% e ossos longos (18,3%. Houve complicações em apenas três pacientes (1,6%, incluindo uma fratura, um caso de parestesia com comprometimento funcional e uma quebra da agulha necessitando remoção cirúrgica. Amostras de 183 lesões (98,4% foram consideradas adequadas para diagnóstico. Resultados malignos foram mais frequentes nos pacientes com suspeita de lesão secundária e história de neoplasia maligna conhecida (p < 0,001 e nos procedimentos orientados pela PET/CT (p = 0,011. Conclusão: A biópsia percutânea guiada por TC é segura e eficaz no diagnóstico de lesões ósseas suspeitas.

  19. [Hyphessobrycon taphorni and H. eschwartzae (Teleostei: Characidae) two new species of fish in the basin of Madre de Dios river, Peru].

    Science.gov (United States)

    Garcia-Alzate, Carlos A; Romin-Valencia, César; Ortega, Hernán

    2013-06-01

    Hyphessobrycon with 129 valid species, is a genus of fish that has a great diversity of species in the Neotropical ichthyofauna, reaches its greatest diversity in the Amazon basin with about 70% of these species, is highly desired by hobbyists because of their beauty and color, and are still meeting new species. We analyzed specimens from the Departamento de Ictiología, Museo de Historia Natural de la Universidad Mayor de San Marcos, Lima, Perú (MUSM); and measurements of the specimens were taken point to point with digital calipers. Observations of bone and cartilage structures were made on cleared and stained (C&S) samples. The morphometric relationships between species using 21 variables were explored using a principal component analysis (PCA). Here we describe two new species, Hyphessobrycon taphorni and H. eschwartzae from the Madre de Dios River drainage, Peru. Hyphessobrycon taphorni sp. n. can be distinguished by the number of dorsal-fin rays (iii, 8), by the number of: pored lateral-line scales (4-5), teeth in the outer premaxillary row (1-2), teeth in the inner premaxillary row (7-8), by: the caudal-peduncle length (11.4-16.4% SL), number of lateral scales (28-29, except from H. loretoensis which has 29-30) and absence of a humeral spot (vs. present), it differs from H. loretoensis by the number of: scales between the lateral line and the anal fin origin (4 vs. 3) and maxillary teeth (2 vs. 3-4), and it differs from H. agulha by the number of branched pectoral-fin rays (11-12 vs. 9-10). Hyphessobrycon eschwartzae sp. n. is distinguished by the number of: simple anal-fin rays (iv), teeth on the dentary (13-15), teeth in the inner premaxillary row (6), teeth in the outer premaxillary row (3, except from H. heterorhabdus and H. loretoensis which have 3-4); it differs from H. loretoensis by the number of: pored lateral-line scales (7 vs. 9-10), scales between the lateral line and the dorsal-fin origin (5 vs. 3-4); it differs from H. agulha in the number of

  20. Directory of Open Access Journals (Sweden)

    João Aris Kouyoumdjian

    2013-04-01

    Full Text Available Objective:To estimate jitter parameters in myasthenia gravis in stimulated frontalis and extensor digitorum muscles using the concentric needle electrode.Methods:Forty-two confirmed myasthenia gravis patients, being 22 males (aged 45.6±17.2 years-old were studied. Jitter was expressed as the mean consecutive difference (MCD. Results: MCD in extensor digitorum was 61.6 µs (abnormal in 85.7% and in frontalis 57.3 µs (abnormal in 88.1%. Outliers represented 90.5% for extensor digitorum and 88.1% for frontalis. At least one jitter parameter was abnormal in 90.5% of the combined studies. Acetylcholine receptor antibody was abnormal in 85.7% of the cases. Conclusions:Stimulated jitter recordings measured from muscles using concentric needle electrode can be used for myasthenia gravis diagnosis with high sensitivity. Extensive normative studies are still lacking and, therefore, borderline findings should be judged with great caution.Objetivo:Mensurar os valores do jitter em pacientes com miastenia gravis nos músculos frontalis e extensor digitorum pela técnica estimulada, utilizando-se eletrodo de agulha concêntrica.Métodos:Foram estudados 42 pacientes, sendo 22 homens (idade 45,6±17,2 anos, com miastenia gravis confirmada. O jitter foi expresso como a média das diferenças consecutivas (MDC.Resultados: A MDC para o extensor digitorum foi 61,6 µs (anormal em 85,7% e para o frontalis 57,3 µs (anormal em 88,1%. Outliers representaram 90,5% para o extensor digitorum e 88,1% para o frontalis. Pelo menos um parâmetro do jitter foi anormal em 90,5% dos estudos combinados. Anticorpo receptor de acetilcolina estava anormal em 85,7% dos casos. Conclusões:Jitter estimulado mensurado por meio de eletrodo de agulha concêntrica pode ser utilizado para diagnóstico de miastenia gravis com elevada sensibilidade. Estudos normativos mais amplos ainda são necessários e, portanto, valores limítrofes devem ser avaliados com cautela.

  1. Lycopodiaceae no Parque Nacional do Itatiaia, RJ e MG, Brasil Lycopodiaceae of Itatiaia National Park, Rio de Janeiro and Minas Gerais states, Brazil

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    Carla Gabriela Vargas Ramos

    2010-03-01

    Full Text Available O Parque Nacional do Itatiaia localiza-se na região Sudeste do Brasil, nos limites dos estados do Rio de Janeiro e Minas Gerais, com altitudes que variam de 390 a 2789 m (Pico das Agulhas Negras. Lycopodiaceae apresenta quatro gêneros e cerca de 500 espécies, com distribuição cosmopolita, caracterizando-se pelos microfilos e esporofilos eligulados e pela homosporia. A família está representada na área de estudo por 23 espécies e uma variedade, distribuídas em três gêneros (Huperzia, 15 espécies; Lycopodiella, quatro espécies e uma variedade; Lycopodium, quatro espécies, totalizando 43% das espécies citadas para o país e 72%, para o estado do Rio de Janeiro. São apresentadas chaves para a identificação de gêneros e espécies, ilustrações, descrições, comentários sobre caracteres diagnósticos e ecológicos, distribuição geográfica e variação altitudinal.Itatiaia National Park is located in Southeastern Brazil, between the states of Rio de Janeiro and Minas Gerais, with altitudes ranging from 390 to 2789 m (Pico das Agulhas Negras. Lycopodiaceae has four genera and approximately 500 species, with cosmopolitan distribution. It is a homosporous family characterized by eligulate leaves and sporophylls. The family is represented in the study area by 23 species and one variety, distributed in three genera (Huperzia, 15 species; Lycopodiella, four species and one variety; Lycopodium, four species, totaling 43% of the species recorded in Brazil and 72% in the state of Rio de Janeiro. Keys to the identification of the genera and species, illustrations, descriptions, notes on taxonomy and ecologicalcharacteristics, geographic distribution and altitudinal variation are presented.

  2. Síndrome de Munchausen e pseudoparaplegia: relato de caso Syndrome of Munchausen and pseudoparaplegia: case report

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    CARLOS ARTEAGA-RODRÍGUEZ

    1999-09-01

    Full Text Available Apresentamos uma paciente com "paraplegia" de oito anos de evolução, que se internou para retirada de agulhas em região lombar e apresentava história de insuficiência renal, câncer de esôfago, ovários e mama, suspeita de tuberculose pulmonar e várias internações em hospitais clínicos e psiquiátricos. No exame psiquiátrico encontramos indiferença à sua doença, prolixidade e descrição detalhada de seus problemas, falando mal dos atendimentos anteriores. Não encontramos evidências de processos neoplásicos. Tinha movimento em bloco de membros inferiores, com preservação dos reflexos e sensibilidade. A eletromiografia, a tomografia de crânio, a ultra-sonografia abdominal e o RX de tórax foram normais. No RX e na tomografia de coluna lombo-sacra observamos 16 agulhas, semelhantes às de costura, em partes moles. Diagnosticada como síndrome de Munchausen, depois de 15 dias de internação com tratamento antidepressivo, psicoterapia e fisioterapia, melhorou. Três meses depois, a paciente encontrava-se assintomática, não voltando mais ao ambulatório.We present a 36 years old female, with a 8 years history of "paraplegia", who was admitted to our department to have "some needles withdrown" from her back. She refered previous admittances to general and psychiatric hospitals in order to treat several episodes of renal failure, combined with other clinical conditions like pulmonary tuberculosis and esophagus, ovary and breast cancer. On the psychiatric evaluation, we found a patient who seemed to be indifferent to her disease, giving accurate and very elaborated description of her symptoms. She was always complaining about previous medical therapies She moved her both legs simultaneously, without any impairment on reflexes and sensibility. We did not find evidence of tumor processes. The electromyography, cranial CT scan, abdominal ultrasound scan and chest X-ray were normal. Lumbosacral X-ray and CT scan showed 16 sewing

  3. Síndrome cólica em equinos de uso militar: análise multivariável de fatores de risco Colic syndrome in military horses: risk factors multivariable analysis

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    Paula Vieira Evans Hossell Laranjeira

    2009-09-01

    Full Text Available O objetivo deste estudo foi identificar os fatores associados a episódios de cólica em equinos de unidades militares no Estado do Rio de Janeiro: Regimento Escola de Cavalaria, Academia Militar das Agulhas Negras e Esquadrão Escola de Cavalaria da Polícia Militar. Para tanto, foi conduzido um estudo de caso controle aninhado em uma coorte. Um total de 770 equinos foi estudado, com 362 (47,0% equinos classificados como casos e 408 (53,0% classificados como controles. A análise multivariável de regressão logística foi utilizada para identificar os fatores preditivos da cólica, mostrando que o sistema de criação dos equinos em confinamento (OR= 3,62; 95% IC 2,57-5,10; o consumo de grãos superior a 6kg dia-1 (OR= 2,64; 95% IC 1,54-4,50; e a idade dos equinos, com maior possibilidade de ocorrência da cólica nos animais com idade superior a 16 anos (OR= 2,08; 95% IC 1,18-3,67, foram fatores de risco significativamente associados à cólica, após ajustamento para outras variáveis.This research aimed to identify colic associated factors in horses of military units in Rio de Janeiro State: Regimento Escola de Cavalaria, Academia Militar das Agulhas Negras and Esquadrão Escola de Cavalaria. A case control study nestled in one coorte was conducted. A total of 770 horses had been studied, with 362 (47.0% horses classified as cases and 408 (53.0% as control. Multivariable analysis of logistic regression was used to identify colic predictive factors, showing that horses confined system creation (OR= 3.62; 95% CI 2.57-5.10, concentrate intake above 6kg day-1 (OR= 2.64; 95% CI 1.54-4.50 and equine age, with higher possibility of colic in horses above 16 years (OR= 2.08; 95% CI 1.18-3.67, had been risk factors significantly associated with colic, after adjustment for other variables.

  4. Is drug-induced toxicity a good predictor of response to neo-adjuvant chemotherapy in patients with breast cancer? -A prospective clinical study

    International Nuclear Information System (INIS)

    Neo-adjuvant chemotherapy is an integral part of multi-modality approach in the management of locally advanced breast cancer and it is vital to predict the response in order to tailor the regime for a patient. The common final pathway in the tumor cell death is believed to be apoptosis or programmed cell death and chemotherapeutic drugs like other DNA-damaging agents act on rapidly multiplying cells including both the tumor and the normal cells by following the same common final pathway. This could account for both the toxic effects and the response. Absence or decreased apoptosis has been found to be associated with chemo resistance. The change in expression of apoptotic markers (Bcl-2 and Bax proteins) brought about by various chemotherapeutic regimens is being used to identify drug resistance in the tumor cells. A prospective clinical study was conducted to assess whether chemotherapy induced toxic effects could serve as reliable predictors of apoptosis or response to neo-adjuvant chemotherapy in patients with locally advanced breast cancer. 50 cases of locally advanced breast cancer after complete routine and metastatic work up were subjected to trucut biopsy and the tissue evaluated immunohistochemically for apoptotic markers (bcl-2/bax ratio). Three cycles of Neoadjuvant Chemotherapy using FAC regime (5-fluorouracil, adriamycin, cyclophosphamide) were given at three weekly intervals and patients assessed for clinical response as well as toxicity after each cycle. Modified radical mastectomy was performed in all patients three weeks after the last cycle and the specimen were re-evaluated for any change in the bcl-2/bax ratio. The clinical response, immunohistochemical response and the drug-induced toxicity were correlated and compared. Descriptive studies were performed with SPSS version 10 and the significance of response was assessed using paired t-test. Significance of correlation between various variables was assessed using chi-square test and coefficient

  5. Non-Hodgkin’s lymphoma with bone involvement: a single center experience with 18 patients

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    Filiz Vural

    2010-03-01

    Full Text Available Objective: Non-Hodgkin’s lymphoma (NHL of bone is a rare entity. The most common histological subtype is diffuse large B cell lymphoma (DLBCL. The major presenting symptoms are soft tissue swelling, bone pain and pathological fracture. Treatment options are chemotherapy, radiotherapy, surgery, or a combination of these modalities. Materials and Methods: We retrospectively analyzed the 18 patients (11 females, 7 males with NHL of bone who were diagnosed and treated between 1995-2005. The median age was 56.5 years. The median duration of symptoms was 4.5 months. The bone pain was the first symptom in all patients. Tru-cut biopsy was performed for diagnosis in most of the cases. Diagnosis in five patients (27.8% required open biopsy. Results: DLBCL (77.8% was the most common histological type among all patients. Other histological subtypes were anaplastic large cell lymphoma (11.1%, Burkitt-like lymphoma (5.6% and marginal zone lymphoma (5.6%. According to Ann Arbor staging system, 44.4% of patients were Stage I, 11.1% were Stage II and 44.4% were Stage IV. Bone marrow involvement was determined in four patients (22.2%. All patients except one were treated with anthracycline-containing regimens and eight patients (44.4% received rituximab combination with chemotherapy. Radiation therapy was performed as the first-line therapy in 9 (50% patients. The median follow-up was 37 months (range, 2-124 months. Among the 17 patients who achieved complete remission, five (27.8% relapsed. All patients were still alive. The five-year relapse-free survival was 73.5%.Conclusion: The treatment of bone lymphoma can be planned according to the stage and location of the disease. Although we had a relatively low number of patients, it could be concluded that whether or not radiation therapy is performed, rituximab in combination with systemic chemotherapy has been proven beneficial on survival.

  6. Advances in endoscopic ultrasound imaging of colorectal diseases.

    Science.gov (United States)

    Cârțână, Elena Tatiana; Gheonea, Dan Ionuț; Săftoiu, Adrian

    2016-02-01

    The development of endoscopic ultrasound (EUS) has had a significant impact for patients with digestive diseases, enabling enhanced diagnostic and therapeutic procedures, with most of the available evidence focusing on upper gastrointestinal (GI) and pancreatico-biliary diseases. For the lower GI tract the main application of EUS has been in staging rectal cancer, as a complementary technique to other cross-sectional imaging methods. EUS can provide highly accurate in-depth assessments of tumour infiltration, performing best in the diagnosis of early rectal tumours. In the light of recent developments other EUS applications for colorectal diseases have been also envisaged and are currently under investigation, including beyond-rectum tumour staging by means of the newly developed forward-viewing radial array echoendoscope. Due to its high resolution, EUS might be also regarded as an ideal method for the evaluation of subepithelial lesions. Their differential diagnosis is possible by imaging the originating wall layer and the associated echostructure, and cytological and histological confirmation can be obtained through EUS-guided fine needle aspiration or trucut biopsy. However, reports on the use of EUS in colorectal subepithelial lesions are currently limited. EUS allows detailed examination of perirectal and perianal complications in Crohn's disease and, as a safe and less expensive investigation, can be used to monitor therapeutic response of fistulae, which seems to improve outcomes and reduce the need for additional surgery. Furthermore, EUS image enhancement techniques, such as the use of contrast agents or elastography, have recently been evaluated for colorectal indications as well. Possible applications of contrast enhancement include the assessment of tumour angiogenesis in colorectal cancer, the monitoring of disease activity in inflammatory bowel disease based on quantification of bowel wall vascularization, and differentiating between benign and

  7. Salivary gland enlargement and sialorrhoea in dogs with spirocercosis: A retrospective and prospective study of 298 cases

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    Liesel L. van der Merwe

    2012-04-01

    Full Text Available This longitudinal cross-sectional clinical study investigated the incidence of sialorrhoea in dogs with spirocercosis and determined whether breed, body weight and the extent of the oesophageal involvement was associated with this presentation. A retrospective analysis was performed on the medical records of 233 dogs and information pertaining to 65 dogs was collected as part of a prospective study. All the animals were client-owned. Patients from the retrospective study underwent thoracic radiography or oesophageal endoscopy to diagnose and characterise the infection and were placed on therapy with a macrocyclic lactone, whereas the patients in the prospective study had both radiography and endoscopy routinely performed and biopsies of the oesophageal nodules collected where possible. Tru-cut biopsies of affected salivary glands were taken in 10 of 13 patients demonstrating clinical signs of sialorrhoea and salivary gland enlargement. The entire salivary gland was sectioned in an additional three dogs with spirocercosis and no sialorrhoea that were presented for post mortem examination. Sialorrhoea was present in 33/298 cases (11%. Fox terrier breeds were over-represented in the patients with sialorrhoea, comprising 36% of cases, whereas they only comprised 1.5% of the patients without sialorrhoea (p < 0.001, chi squared test and 5% of the combined group. Dogs weighing 12 kg or less were significantly over-represented in the sialorrhoea group, 69% versus 19.5% (p < 0.001, chi square test. Age was not significantly different between the two groups (p < 0.08, Mann-Whitney test. The number of oesophageal nodules per case was significantly higher in the non-sialorrhoea cases (p = 0.048, Mann-Whitney test. The prevalence of distal oesophageal and lower oesophageal sphincter involvement, and neoplastic transformation of the nodules were not statistically different between the two groups. None of the fox terriers in either group showed neoplastic

  8. Is drug-induced toxicity a good predictor of response to neo-adjuvant chemotherapy in patients with breast cancer? -A prospective clinical study

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    Singh JP

    2004-08-01

    Full Text Available Abstract Background Neo-adjuvant chemotherapy is an integral part of multi-modality approach in the management of locally advanced breast cancer and it is vital to predict the response in order to tailor the regime for a patient. The common final pathway in the tumor cell death is believed to be apoptosis or programmed cell death and chemotherapeutic drugs like other DNA-damaging agents act on rapidly multiplying cells including both the tumor and the normal cells by following the same common final pathway. This could account for both the toxic effects and the response. Absence or decreased apoptosis has been found to be associated with chemo resistance. The change in expression of apoptotic markers (Bcl-2 and Bax proteins brought about by various chemotherapeutic regimens is being used to identify drug resistance in the tumor cells. A prospective clinical study was conducted to assess whether chemotherapy induced toxic effects could serve as reliable predictors of apoptosis or response to neo-adjuvant chemotherapy in patients with locally advanced breast cancer. Methods 50 cases of locally advanced breast cancer after complete routine and metastatic work up were subjected to trucut biopsy and the tissue evaluated immunohistochemically for apoptotic markers (bcl-2/bax ratio. Three cycles of Neoadjuvant Chemotherapy using FAC regime (5-fluorouracil, adriamycin, cyclophosphamide were given at three weekly intervals and patients assessed for clinical response as well as toxicity after each cycle. Modified radical mastectomy was performed in all patients three weeks after the last cycle and the specimen were re-evaluated for any change in the bcl-2/bax ratio. The clinical response, immunohistochemical response and the drug-induced toxicity were correlated and compared. Descriptive studies were performed with SPSS version 10 and the significance of response was assessed using paired t-test. Significance of correlation between various variables was

  9. Autoimmune pancreatitis. An update

    International Nuclear Information System (INIS)

    Autoimmune pancreatitis (AIP) is a rare disease, the pathophysiological understanding of which has been greatly improved over the last years. The most common form, type 1 AIP belongs to the IgG4-related diseases and must be distinguished from type 2 AIP, which is a much rarer entity associated with chronic inflammatory bowel disease. Clinically, there is an overlap with pancreatic cancer. Imaging and further criteria, such as serological and histological parameters are utilized for a differentiation between both entities in order to select the appropriate therapy and to avoid the small but ultimately unnecessary number of pancreatectomies. The diagnostics of AIP are complex, whereby the consensus criteria of the International Association of Pancreatology have become accepted as the parameters for discrimination. These encompass five cardinal criteria and one therapeutic criterion. By applying these criteria AIP can be diagnosed with a sensitivity of 84.9 %, a specificity of 100 % and an accuracy of 93.8 %. The diagnosis of AIP is accomplished by applying several parameters of which two relate to imaging. As for the routine diagnostics of the pancreas these are ultrasound, computed tomography (CT) and magnetic resonance imaging (MRI). Important for the differential diagnosis is the exclusion of signs of local and remote tumor spread for which CT and MRI are established. The essential diagnostic parameter of histology necessitates sufficient sample material, which cannot usually be acquired by a fine needle biopsy. CT or MRI are the reference standard methods for identification of the optimal puncture site and imaging-assisted (TruCut) biopsy. In patients presenting with unspecific upper abdominal pain, painless jaundice combined with the suspicion of a pancreatic malignancy in imaging but a mismatch of secondary signs of malignancy, AIP should also be considered as a differential diagnosis. As the diagnosis of AIP only partially relies on imaging radiologists also

  10. Study of the brickwork masonry cracking with a cohesive fracture model

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    Reyes, E.

    2011-09-01

    Full Text Available This paper presents a numerical procedure to simulate the cracking process of the brickwork masonry under tensile/shear loading. The model is an extension of the cohesive model prepared by the authors for concrete, and takes into account the anisotropy of the material. The numerical procedure includes two steps: 1 calculation of the crack path with a linear elastic fracture model, 2 after the crack path is obtained, an interface finite element (using the cohesive fracture model is incorporated into the trajectory. Such a model is then implemented into a commercial code by means of a user subroutine, consequently being contrasted with experimental results. Fracture properties of masonry are independently measured for two directions on the composed masonry, and then input in the numerical model. This numerical procedure accurately predicts the experimental mixed mode fracture records for different orientations of the brick layers on masonry panels.

    Este artículo presenta un modelo de cálculo que permite simular el comportamiento en rotura de la fábrica de ladrillo bajo solicitaciones de tracción y cortante. El modelo extiende el modelo cohesivo formulado por los autores para hormigón, considerando la anisotropía del material. El procedimiento de cálculo consta de dos fases: 1 obtención de la trayectoria de grieta mediante un cálculo elástico lineal, 2 incorporación del modelo cohesivo en la misma mediante elementos de intercara. El modelo se ha implementado en un programa de elementos finitos comercial con una subrutina de usuario y se ha contrastado con los resultados experimentales de los ensayos a escala. Las propiedades mecánicas de la fábrica, en especial las de fractura, se miden con ensayos de caracterización en dos direcciones. Éstas se incorporan al modelo de cálculo para simular los ensayos de fractura en modo mixto, prediciendo los resultados adecuadamente para distintas orientaciones de los tendeles.

  11. Estudo epidemiológico das lesões traumáticas de plexo braquial em adultos Epidemiological study of the traumatic brachial plexus injuries in adults

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    Leandro Pretto Flores

    2006-03-01

    Full Text Available OBJETIVO: Determinar informações epidemiológicas sobre as variáveis relacionadas ao trauma de plexo braquial em adultos. MÉTODO: Foram analisados 35 pacientes, de maneira prospectiva, atendidos consecutivamente no período de um ano. RESULTADOS: A maioria das lesões apresentou localização supraclavicular (62%, sendo 21 lesões por mecanismo de tração (60%, nove por projétil de arma de fogo (25%, três por compressão (8,5% e dois ferimentos cortantes (5,7%. Acidentes motociclísticos responderam por 54% das causas do trauma. A TC-mielografia identificou avulsão radicular em 16 casos (76%. Melhora neurológica parcial espontânea foi observada em 43% dos pacientes. Dor neuropática foi observada em 25 casos (71% sendo que em 16 (64% pôde ser controlada com medicações orais. CONCLUSÃO: Os traumas de plexo braquial são mais freqüentemente associados aos mecanismos de tração, sendo comum identificação de avulsão radicular. Em geral produzem dor no membro afetado e estão associados a lesões em outros órgãos. Na presente série, a incidência calculada para a população de abrangência foi 1,75/100000/ano.OBJECTIVE: This study aims to provide information about epidemiological factors related to traumatic brachial plexus injuries in adults. METHOD: Prospective analysis of 35 consecutive cases, observed in a period of one year. RESULTS: Most of the lesions were supraclavicular (62%. Twenty-one cases occurred due to traction (60%, 9 to gun shot wound (25%, 3 to compression (8.5% and two perforation/laceration (5.7%. Motorcycle accidents were the cause of trauma in 54% of patients. CT myelography demonstrated root avulsion in 16 cases (76%. Parcial spontaneous neurological recovery was observed in 43% of the patients. Neuropathic pain occurred in 25 (71% cases, and the use of some oral intake drugs (as amitriptiline or carbamazepine controlled it in 64% of times. CONCLUSION: Traction is the most frequent mechanism related to

  12. Aplicación de un programa de control de infecciones intrahospitalarias en establecimientos de salud de la región San Martín, Perú.

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    Heriberto Arévalo R

    2003-04-01

    Full Text Available Objetivo: Aplicar un programa de control de infecciones intrahospitalarias (IIH para modificar conocimientos, actitudes y prácticas (CAP del personal de salud y su efecto sobre la prevalencia de IIH en establecimientos de salud de San Martín, Perú, julio 2000 - enero 2001. Materiales y métodos: Estudio prospectivo de intervención. Se determinó la prevalencia basal, intermedia y final de IIH y se evaluó los cambios en CAP con la metodología investigación-acción. Participó personal del Hospital de Apoyo Banda de Shilcayo (HABS, Hospital Nueva Cajamarca (HNC, Centro Materno Perinatal, Centro de Salud Lluyllucucha, localizados en zonas rurales. Se utilizaron indicadores estandarizados nacionales. Resultados: Los médicos tuvieron la menor participación (62,0%; y el personal técnico la mayor (90,0%. Las prácticas adecuadas de lavado de manos y materiales, utilización de ropa y guantes, manejo de objetos punzo-cortantes y exposición a fluidos aumentaron significativamente (p<0,01. El mismo comportamiento tuvieron las actitudes de limpieza, desinfección y esterilización en centro quirúrgico. El HABS presentó la prevalencia basal más alta de IIH (26,8%, mientras que el HNC la menor (15,4%. 36,0% fueron casos de gérmenes aislados en hemocultivos de pacientes sin foco infeccioso establecido. 36,0% correspondió a infecciones de herida operatoria, 5,0% neumonías, 2,0% endometritis puerperales, 5,0% infecciones en pacientes quemados y 16,0% infecciones urinarias. Enterobacter aerogenes (32,0% y Pseudomonas aeuroginosa (24,0% fueron las bacterias más frecuentes. La prevalencia de IIH disminuyó (de 25,7% a 15,2% (p0,05. Conclusiones: La aplicación de un programa de control de IIH logró mejorar significativamente las actitudes y prácticas en establecimientos de salud de San Martín, Perú.

  13. Shear friction capacity of recycled concretes

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    Eiras, J.

    2010-09-01

    Full Text Available The aim of this research was to determine the behavior of recycled concrete in response to the phenomenon of shear transfer. To perform it, a conventional control concrete and a concrete with 50% recycled coarse aggregate were designed. An additional goal was to shed light on how this behavior is modified with a pozzolanic addition, silica fume. Therefore, two types of concrete were designed, a conventional and a recycled concrete, both made with 8% of silica fume. In conclusion, a reduction of shear friction capacity was observed in recycled concretes, considerably higher in the case of the specimen without reinforcement. The addition of silica fume improved the behavior of recycled concretes. The results obtained were compared with the formulations of the different authors. In all cases, these were found to be conservative. However, the safety margins offered by recycled concretes are lower than those obtained with conventional concretes.

    En esta investigación se estudió el comportamiento de los hormigones reciclados frente al fenómeno de transmisión de cortante. Para ello se diseñó un hormigón convencional de control y un hormigón con el 50% del árido grueso reciclado. Adicionalmente, para determinar cómo este comportamiento se ve modificado con la incorporación de una adición puzolánica (humo de sílice, se procedió al diseño de un hormigón convencional y su correspondiente reciclado con un 8% de humo de sílice. Los resultados indicaron una disminución de la capacidad frente a este fenómeno en los hormigones reciclados, más acusada en ausencia de armadura pasante. La adición de humo de sílice mejora el comportamiento de este material. Los resultados experimentales obtenidos se compararon con formulaciones teóricas de diversos autores, concluyéndose que éstas son, en todos los casos, conservadoras, aunque reducen el margen de seguridad en los hormigones reciclados.

  14. O conceito de risco e os seus efeitos simbólicos nos acidentes com instrumentos perfurocortantes El concepto de riesgo y sus efectos simbólicos en accidentes con instrumentos perfurocortantes The concept of risk and its symbolic effects in accidents with sharp instruments

    Directory of Open Access Journals (Sweden)

    Everaldo José da Silva

    2012-10-01

    Full Text Available O estudo objetivou compreender o risco ocupacional como um processo simbólico que estrutura as atividades diárias dos profissionais da área de saúde que manipulam instrumentos perfurocortantes. Pesquisa descritiva realizada em um hospital universitário com dados coletados por meio do levantamento dos acidentes de trabalho no Centro de Tratamento Intensivo adulto e na Lavanderia, pela aplicação de um questionário a 105 profissionais de saúde. Os dados foram analisados por meio de uma perspectiva interdisciplinar para conciliar a análise quantitativa e qualitativa dos dados. Os resultados revelaram que, embora os dados indiquem baixo índice de acidentes, ainda é preciso aprimorar instrumentos como o mapa de riscos e o uso de equipamentos de segurança, bem como investir na capacitação das equipes.El estudio tuvo como objetivo comprender los riesgos profesionales en los procesos simbólicos que dan forma a las actividades diarias de los trabajadores de salud que manipulan instrumentos cortantes. Investigación descriptiva realizada en un hospital universitario de con los datos recogidos a través de la encuesta del accidentes de trabajo en la Unidad de Cuidados Intensivos y en el Servicio de lavandería, mediante la aplicación de 105 cuestionarios. Los datos fueron analizados con una perspectiva interdisciplinaria, para una posible conciliación de las análisis cuantitativa y cualitativa. Los resultados revelaron que, aunque los datos indican bajas tasas de accidentes, se necesita mejorar instrumentos tales como el mapa de riesgo, el uso de equipo de seguridad y capacitación del personal.The study aims to understand the occupational risks as symbolic processes that shapes the daily activities of health professionals that manipulate sharps objects. Descriptive research was conducted at a university hospital, with information collected through the survey on the accidents at work in Intensive Care and hospital laundry, with the

  15. Dimensionamiento del refuerzo a flexión con laminados de polímeros reforzados con fibras (FRP evitando su desprendimiento prematuro

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    Oller, E.

    2013-12-01

    Full Text Available According to the available experimental research related to structures flexurally strengthened by bonding fiber reinforced polymer (FRP laminates, the laminate debonds in a brittle manner in most tests. This debonding failure usually initiates in the most loaded regions due the effect of intermediate cracks (intermediate crack debonding. From the beginning of this technique, several models have been developed to avoid this premature failure. However, some of them present a significant scatter in relation to the experimental data. This paper presents a comparative analysis of the existing formulations through a database of tests compiled by the authors. Afterwards, a design procedure based on a shear-bending moment interaction diagram related to intermediate crack debonding is presented. This interaction diagram depends on the maximum shear force between crack discontinuities. Finally, the proposed method is compared to the rest of the models obtaining satisfactory results when predicting the failure load.La investigación experimental de elementos de hormigón reforzados a flexión mediante la adhesión de laminados de polímeros reforzados con fibras (FRP muestra que en la mayor parte de ensayos, el laminado se desprende de forma prematura iniciándose normalmente el fallo en las regiones más solicitadas debido al efecto de las fisuras intermedias. Desde los inicios de esta técnica de refuerzo, se han desarrollado modelos para evitar este tipo de rotura, la mayoría de los cuales presentan una dispersión considerable comparando sus resultados con los experimentales. En este artículo se presenta un análisis comparativo de diferentes formulaciones existentes a partir de una base de datos de ensayos recopilada por los autores. Posteriormente, se propone un método de dimensionamiento basado en un diagrama de interacción cortante-flexión asociado al desprendimiento del refuerzo, que depende de la máxima fuerza rasante transmitida entre

  16. Especies nuevas del género Gibberula (Mollusca: Cystiscidae de Cuba y Venezuela New species of the genus Gibberula (Mollusca: Cystiscidae from Cuba and Venezuela

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    José Espinosa

    2011-03-01

    Full Text Available Se describen 3 especies nuevas de moluscos marinos: Gibberula palmasola sp. n., recolectada en la vegetación asociada a rocas rodeadas de sedimentos blandos en una laguna costera cercada por mangle en la península de Guanahacabibes, Cuba, y caracterizada por presentar, el animal vivo, la cabeza negra y una distribución típica de bandas negras y pardas con lunares anaranjados en el manto bajo la concha; Gibberula dosmosquises sp. n., recolectada en fondos rocosos del Caribe insular de Venezuela, se caracteriza por una discreta coloración del manto y un patrón de manchas en el pie, y Gibberula thetisae sp. n, proveniente de los pastos marinos del golfo de Batabanó, Cuba, con 3 pliegues en la columela, el último muy débil, y un labio externo casi cortante, caracteres que permiten separarla de todas las demás especies conocidas en el área antillana, aunque se desconozca la anatomía del animal. Se discute la lista de especies válidas del género para Cuba y Venezuela, y se hacen adiciones y consideraciones al complejo de especies en torno a Gibberula ubitaensis Espinosa y Ortea, 2000.Three new species of marine molluscs are described. Gibberula palmasola new species, collected in vegetation associated with rocks surrounded by soft sediments in a coastal lagoon surrounded by mangroves in Guanahacabibes Peninsula, Cuba, and characterized by a black head and typical distribution of black and brown bands and orange spots in the mantle. Gibberula dosmosquises new species, collected in rocky bottoms of a Caribbean island from Venezuela, characterized by a simple staining in the mantle and a pattern of spots on the foot, and Gibberula thetisae new species, from sea grass in the gulf of Batabano, Cuba, with shell having 3 columellar folds, the last very weak, and a sharp outer lip; although, its anatomy is not known, these conchological characters separate it from all other known species in the Antilles. Aditionally, the list of valid species

  17. Refuerzos de losas macizas de edificación en hormigón armado

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    Ramírez, José L.

    1990-12-01

    Full Text Available It is frequent to find buildings made of solid slab reinforced concrete that require strengthening, either because of a change in use or due to deterioration. In the latter case, this is fundamentally caused by corrosion of the reinforcement. Strengthening this type of structural element is more feasible than for those made of beams thanks to their greater resistance against all the effects derived from the shearing load. Therefore, the authors considered interesting the development of a research program that would evaluate the experimental behavior of different strengthening methods, from the most simple or immediate methods to others with greater intervention levels, also taking into consideration the use of special adhesive mortars. The results of the bending tests, carried out almost on a full scale, with five different strengthening procedures and the comparison of their theoretical calculation with the reference slab tests allow interesting conclusions to be reached. In some cases behavior is very good while others are susceptible to correction using the appropriate safety factor, and in some cases the load increase rate should be limited due to the strengthening becoming completely detached.

    Es frecuente encontrar en edificación forjados a base de losa maciza de hormigón armado que precisan refuerzo, sea por cambio de uso o por deterioro, en este caso fundamentalmente debido a la corrosión de armaduras. El refuerzo de este tipo de elementos estructurales es más viable que el de los constituidos por viguetas debido a su mejor resistencia a todos los efectos derivados del esfuerzo cortante. Con todo, ha parecido interesante a los autores el desarrollar un programa de investigación que evaluara el comportamiento experimental de diversos métodos de refuerzo, desde los más simples e inmediatos a otros con mayor grado de intervención, considerando a la vez la utilización de morteros especiales adhesivos. Los resultados de

  18. EFECTO DE LA RELACIÓN AGITACIÓN-AIREACIÓN SOBRE EL CRECIMIENTO CELULAR Y LA PRODUCCIÓN DE AZADIRACTINA EN CULTIVOS CELULARES DE AZADIRACHTA INDICA A. JUSS AGITATION-AERATION RELATION EFFECTS ON CELL CULTURE OF AZADIRACHTA INDICA A. JUSS NEEM ON AZADIRACHTIN PRODUCTION IN A STIRRED TANK BIOREACTOR

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    Juan Carlos Bedoya Pérez

    2010-06-01

    Full Text Available Se evaluó la producción de azadiractina a partir de células de Azadirachta indica A. Juss, establecidas en un biorreactor sometido a variaciones en la velocidad de agitación y el caudal del aire suministrado al medio de cultivo. Además, se determinó el efecto del oxigeno disuelto en el medio de cultivo, sobre el crecimiento celular y la producción del metabolito, mediante la estimación del coeficiente de transferencia de oxígeno (kLa, la velocidad de transferencia de oxígeno (OTR, la velocidad de consumo de oxígeno (OUR y el consumo celular específico de oxígeno (SOUR. Los resultados mostraron que el crecimiento celular y la producción de azadiractina, están fuertemente influenciados por las condiciones de mezclado presentes en el biorreactor, indicando un alto grado de sensibilidad de las células al estrés hidrodinámico. Por otra parte, se evidenció que los valores de kLa y OTR aumentaron al incrementar la velocidad de agitación y aireación, lo que favoreció la transferencia de masa, mientras que ocurrió lo contrario con la OUR y la SOUR, posiblemente debido a la pérdida de la viabilidad celular, al incrementar los esfuerzos cortantes dentro del biorreactor.It was evaluated the production of azadiractin from cells of Azadirachta indica A. Juss, established in a biorreactor submitted to variations in the speed of agitation and the air flow provided to the culture medium. Besides, it was determined the effect of the oxygen dissolved in the culture medium, on cellular growth and production of the metabolite, by means of estimating the oxygen transfer coefficient (kLa , oxygen transfer rate (OTR, oxygen uptake rate (OUR, and the cellular specific oxygen uptake rate (SOUR. The results showed that the cellular growth and azadiractin production, are strongly influenced by the mixed conditions in the biorreactor, indicating a high degree of sensitivity of cells to the hydrodinamic stress. On the other hand, it was evident that k

  19. A Regional Stable Carbon Isotope Dendro-Climatology from the South African Summer Rainfall Area.

    Science.gov (United States)

    Woodborne, Stephan; Gandiwa, Patience; Hall, Grant; Patrut, Adrian; Finch, Jemma

    2016-01-01

    Carbon isotope analysis of four baobab (Adansonia digitata L.) trees from the Pafuri region of South Africa yielded a 1000-year proxy rainfall record. The Pafuri record age model was based on 17 radiocarbon dates, cross correlation of the climate record, and ring structures that were presumed to be annual for two of the trees. Here we present the analysis of five additional baobabs from the Mapungubwe region, approximately 200km west of Pafuri. The Mapungubwe chronology demonstrates that ring structures are not necessarily annually formed, and accordingly the Pafuri chronology is revised. Changes in intrinsic water-use efficiency indicate an active response by the trees to elevated atmospheric CO2, but this has little effect on the environmental signal. The revised Pafuri record, and the new Mapungubwe record correlate significantly with local rainfall. Both records confirm that the Medieval Warm Period was substantially wetter than present, and the Little Ice Age was the driest period in the last 1000 years. Although Mapungubwe is generally drier than Pafuri, both regions experience elevated rainfall peaking between AD 1570 and AD 1620 after which dry conditions persist in the Mapungubwe area until about AD 1840. Differences between the two records correlate with Agulhas Current sea-surface temperature variations suggesting east/west displacement of the temperate tropical trough system as an underlying mechanism. The Pafuri and Mapungubwe records are combined to provide a regional climate proxy record for the northern summer rainfall area of southern Africa. PMID:27427912

  20. Glacial-interglacial vegetation dynamics in South Eastern Africa coupled to sea surface temperature variations in the Western Indian Ocean

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    L. M. Dupont

    2011-11-01

    Full Text Available Glacial-interglacial fluctuations in the vegetation of South Africa might elucidate the climate system at the edge of the tropics between the Indian and Atlantic Oceans. However, vegetation records covering a full glacial cycle have only been published from the eastern South Atlantic. We present a pollen record of the marine core MD96-2048 retrieved by the Marion Dufresne from the Indian Ocean ∼120 km south of the Limpopo River mouth. The sedimentation at the site is slow and continuous. The upper 6 m (spanning the past 342 Ka have been analysed for pollen and spores at millennial resolution. The terrestrial pollen assemblages indicate that during interglacials, the vegetation of eastern South Africa and southern Mozambique largely consisted of evergreen and deciduous forests. During glacials open mountainous scrubland dominated. Montane forest with Podocarpus extended during humid periods was favoured by strong local insolation. Correlation with the sea surface temperature record of the same core indicates that the extension of mountainous scrubland primarily depends on sea surface temperatures of the Agulhas Current. Our record corroborates terrestrial evidence of the extension of open mountainous scrubland (including fynbos-like species of the high-altitude Grassland biome for the last glacial as well as for other glacial periods of the past 300 Ka.

  1. Atypical mycobacterias associated to acupuncuture: an integrative review Micobacterias atípicas asociadas a la acupuntura: revisión integral Micobactérias atípicas associadas à acupuntura: revisão integrativa

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    Juliana Rizzo Gnatta

    2013-02-01

    personales, la piel del paciente colonizada por micobacterias y la reutilización de agujas en sitios diferentes en el mismo paciente. Ocho de los estudios no mencionaron nada acerca de las fuentes. CONCLUSIÓN: Entre los 295 casos, M. abscessus fue el agente patológico en más del 96% de los mismos. Se deben llevar a cabo medidas bien establecidas de control recomendadas por organismos reguladores, como el de enfermería, para la prevención de la infección, y adaptarlas a la medicina complementaria y alternativa.OBJETIVO: avaliar evidências relativas às principais fontes ou mecanismos de transmissão de infecções causadas por micobactérias atípicas associadas à acupuntura e espécies causadoras de infecção. MÉTODO: revisão integrativa, realizada em dezembro de 2011, com descritores indexados nas bases Lilacs, Medline, Embase, OvidSP e Cochrane Library, sem restrições de ano, tipo de estudo ou idioma. RESULTADOS: dentre 16 publicações, uma identificou a fonte de contaminação - solução de glutaraldeído diluída, usada para limpar equipamentos. Três estabeleceram fontes prováveis: toalhas, bolsas de água quente ou tanque para ferver água, reutilização de agulhas reprocessadas. Quatro indicaram fontes possíveis: agulhas contaminadas, reutilização de agulhas, pele do paciente colonizada por micobactérias e reutilização de agulhas, em diferentes sítios no mesmo paciente. Oito não citaram nada sobre fontes. CONCLUSÃO: dos 295 casos, M. abscessus prevaleceu em mais de 96%. Práticas bem estabelecidas, recomendadas por controladores de infecção, como enfermeiros, para prevenção de infecções, devem ser implementadas e adaptadas às práticas complementares.

  2. Middle and Late Pleistocene paleoscape modeling along the southern coast of South Africa

    Science.gov (United States)

    Fisher, Erich C.; Bar-Matthews, Miryam; Jerardino, Antonieta; Marean, Curtis W.

    2010-06-01

    Changing climates, environment, and sea levels during the Middle and Late Pleistocene must have had significant impacts on early modern humans and their behavior. However, many important archaeological sites occur along the current coastline of South Africa where the gradual slope of the offshore Agulhas Bank meant that small changes to sea level height potentially caused significant shifts in coastline position. The geographic context of these currently coastal sites would have been transformed by sea level shifts from coastal to near-coastal to fully terrestrial. To understand human adaptations as reflected in the archaeological deposits of these now-coastal sites we need to accurately model coastline position through time. Here, we introduce a Paleoscape model as a conceptual tool to ground the records for human behavioral evolution within a dynamic model of paleoenvironmental changes. Using integrated bathymetric datasets, GIS, and a relative sea level curve we estimate the position of the coastline at 1.5 ka increments over the last ˜420,000 years. We compare these model predictions to strontium isotope ratios from speleothems as an independent test and then compare the coastline predictions to evidence for shellfish exploitation through time. Both tests suggest our model is relatively robust. We then widen our paleoscape model to most of the Cape region and compare the predictions of this broadened model to evidence from Blombos cave.

  3. Tumor primário de pulmão simulando doença de Alzheimer: relato de caso

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    José Eduardo Martinelli

    2016-03-01

    Full Text Available RESUMO Retratamos o relato de um homem de 61 anos que apresentava um glioblastoma multiforme em região do giro têmporo-occipital lateral esquerdo que rechaça cranialmente o hipocampo e o corno temporal do ventrículo lateral correspondente. Não havia sinais e sintomas neurológicos e o quadro clínico lembrava a demência de Alzheimer. Havia comprometimento de memória e alterações comportamentais com duração de três meses. Foram afastadas inicialmente outras causas de demência rapidamente progressivas e a ressonância magnética revelou a etiologia tumoral dos sintomas neuropsiquiátricos. Foi submetido à bateria de testes neuropsicométricos com pontuação compatível com doença de Alzheimer (DA. Em razão de extensa área de edema, foi introduzida dexametasona com reversão completa dos sintomas neuropsiquiátricos iniciais e a repetição da bateria neuropsicológica mostrou melhora acentuada em todos os testes. Optou-se por tratamento conservador, após biópsia por agulha, com evolução para óbito em cinco meses.

  4. Criptococose cutânea associada à severa infestação por Sarcoptes sp. e Demodex sp. em um cão

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    Danieli Brolo Martins

    2014-01-01

    Full Text Available Este trabalho descreve um caso de criptococose canina localizada na pele da região interdigital de um cão. Um cão de rua, sem raça definida, adulto jovem apresentava lesões pruriginosas, alopécicas e crostosas em toda extensão corpórea, e uma lesão ulcerada interdigital no membro pélvico esquerdo. A citologia aspirativa por agulha fina (CAAF da lesão interdigital demonstrou um processo inflamatório acrescido de organismos leveduriformes compatíveis com Cryptococcus sp. Efetuou-se, a seguir, a cultura fúngica, que ratificou o resultado da CAAF. O paciente também apresentou diagnóstico positivo para Sarcoptes sp. e Demodex sp. Cryptococcus sp. é o agente etiológico da criptococose, uma doença infecciosa oportunista que acomete o homem, animais domésticos e silvestres. A provável imunidade baixa do cão, neste estudo, pode ter sido um fator desencadeante para o desenvolvimento da doença. A criptococose em caninos, apresentada na forma cutânea, é incomum, o que justifica a relevância deste relato.

  5. Trends in commercial handline catches of Redfishes along the Southern Cape Coast, Republic of South Africa

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    R. J. M Crawford

    1982-11-01

    Full Text Available During the period 1898-1906 red romans Chrysoblephus laticeps dominated redfish landings at Strand and Hermanus, Republic of South Africa, ports subject to cool upwelling conditions. Red stumpnoses C. gibbiceps were the main species along the eastern Cape Peninsula and seventy-fours Polysteganus undulosus at most harbours east of Cape Agulhas. By the late 1970's romans were dominant between Kalk Bay and Arniston and also important contributors else-where, but seventy-fours were only recorded in any significant quantities from Port Alfred. Interpretation of these trends is complicated by a lumping of catches, but the possibility of an environmental change favouring romans (cooler water at the expense of seventy-fours (warmer water cannot be discounted. Other marine forms having a biology associated with cooler waters have also increased along the southern Cape coast in recent years. Redfish resources at Gans Bay and Struts Bay are not currently overexploited, but provide a valuable source of remuneration for local fishermen when preferred target species are absent. Limited data collected in the Tsitsikamma Coastal National Park indicate that dageraad C. cristiceps populations could deteriorate rapidly if subjected to high fishing pressure. The contribution of dageraads to combined redfish landings is currently highest in areas of low exploitation.

  6. Acupuntura: bases científicas e aplicações

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    Scognamillo-Szabó Márcia Valéria Rizzo

    2001-01-01

    Full Text Available A acupuntura visa à terapia e à cura das enfermidades pela aplicação de estímulos através da pele, com a inserção de agulhas em pontos específicos. Essa técnica esteve isolada do mundo ocidental durante milênios, distanciando sua forma de raciocínio e linguagem da cultura ocidental. Isto restringe sua aceitação no Ocidente, sendo considerada mística e sem base científica. Além disso, a prática da acupuntura no Ocidente se depara com deficiências no ensino e difusão científica. Porém, a eficácia dessa terapia levou a Organização Mundial de Saúde a listar enfermidades que podem ser tratadas pela acupuntura e, recentemente, essa técnica foi reconhecida como especialidade médica veterinária no Brasil. A pesquisa da acupuntura reveste-se, portanto, de grande interesse, na medida em que poderá traduzir conhecimentos milenares, contribuindo para sua aceitação e incorporação.

  7. Técnica para injeção intravítrea de drogas no tratamento de doenças vítreorretinianas Technique of intravitreal drug injection for therapy of vitreoretinal diseases

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    Eduardo Buchele Rodrigues

    2008-12-01

    Full Text Available A injeção intravítrea é atualmente a técnica mais utilizada no tratamento de várias doenças vítreorretinianas. Neste artigo serão discutidas a técnica e complicações da injeção intravítrea de drogas no tratamento de doenças vítreorretinianas. Em resumo, a técnica envolve várias etapas. Inicialmente dias antes da injeção pode-se realizar aplicação de antibióticos e acetazolamida para prevenção de infecção e redução da pressão intra-ocular. Antes do procedimento deve-se dilatar a pupila e executar anestesia tópica com colírios ou gel anestésico. A antissepsia pré-operatória envolve aplicação de colírios de iodo-povidona 5% no fundo de saco conjuntival ao menos 10 minutos antes do procedimento. A injeção deve ser realizada no centro cirúrgico com uso de luvas estéreis e máscara pelo cirurgião. O olho deve ser exposto com blefarostato estéril, e proteção com "sterile-drape" para evitar contato entre a agulha e pálpebras/cílios. A agulha deve ser posicionada no momento da injeção a 3,5 - 4 mm do limbo, e leve mobilização da conjuntiva com um cotonete estéril ou uma pinça facilitam a penetração da agulha através da conjuntiva e esclera. A agulha deve ser inserida gentilmente para dentro da cavidade vítrea até 6 mm de profundidade. Imediatamente após a injeção o paciente deve ser examinado por técnica de oftalmoscopia binocular indireta. Caso a acuidade visual seja ausência de percepção luminosa ou oclusão vascular arterial retiniana seja observada, terapias para diminuição da pressão como paracentese na camada anterior ou massagem por oculopressão diretamente sobre o globo ocular devem ser imediatamente tomadas. A alta ambulatorial deve ser realizada quando o cirurgião estiver ciente da ausência de complicações intra-operatórias; o paciente deverá sair do centro cirúrgico com curativo oclusivo. O paciente deve ser submetido a exame oftalmológico completo no primeiro dia p

  8. Southern Ocean control of glacial AMOC stability and Dansgaard-Oeschger interstadial duration

    Science.gov (United States)

    Buizert, Christo; Schmittner, Andreas

    2015-12-01

    Glacial periods exhibit abrupt Dansgaard-Oeschger (DO) climatic oscillations that are thought to be linked to instabilities in the Atlantic meridional overturning circulation (AMOC). Great uncertainty remains regarding the dynamics of the DO cycle, as well as controls on the timing and duration of individual events. Using ice core data we show that the duration of warm (interstadial) periods is strongly correlated with Antarctic climate, and presumably with Southern Ocean (SO) temperature and the position of the Southern Hemisphere (SH) westerlies. We propose a SO control on AMOC stability and interstadial duration via the rate of Antarctic bottom water formation, meridional density/pressure gradients, Agulhas Leakage, and SO adiabatic upwelling. This hypothesis is supported by climate model experiments that demonstrate SO warming leads to a stronger AMOC that is less susceptible to freshwater perturbations. In the AMOC stability diagram, SO warming and strengthening of the SH westerlies both shift the vigorous AMOC branch toward higher freshwater values, thus raising the threshold for AMOC collapse. The proposed mechanism could provide a consistent explanation for several diverse observations, including maximum DO activity during intermediate ice volume/SH temperature, and successively shorter DO durations within each Bond cycle. It may further have implications for the fate of the AMOC under future global warming.

  9. Evidence for current-controlled sedimentation along the southern Mozambique continental margin since Early Miocene times

    Science.gov (United States)

    Preu, Benedict; Spieß, Volkhard; Schwenk, Tilmann; Schneider, Ralph

    2011-12-01

    Major plastered drift sequences were imaged using high-resolution multichannel seismics during R/V Meteor cruises M63/1 and M75/3 south of the Mozambique Channel along the continental margin of Mozambique off the Limpopo River. Detailed seismic-stratigraphic analyses enabled the reconstruction of the onset and development of the modern, discontinuous, eddy-dominated Mozambique Current. Major drift sequences can first be identified during the Early Miocene. Consistent with earlier findings, a progressive northward shift of the depocenter indicates that, on a geological timescale, a steady but variable Mozambique Current existed from this time onward. It can furthermore be shown that, during the Early/Middle Miocene, a coast-parallel current was established off the Limpopo River as part of a lee eddy system driven by the Mozambique Current. Modern sedimentation is controlled by the interplay between slope morphology and the lee eddy system, resulting in upwelling of Antarctic Intermediate Water. Drift accumulations at larger depths are related to the reworking of sediment by deep-reaching eddies that migrate southward, forming the Mozambique Current and eventually merging with the Agulhas Current.

  10. Síndrome do desfiladeiro torácico tipo neurogênico verdadeiro: relato de dois casos

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    SCOLA ROSANA HERMINIA

    1999-01-01

    Full Text Available A síndrome do desfiladeiro torácico neurogênica verdadeira é entidade rara que resulta da compressão ou estiramento do tronco inferior do plexo braquial por costela cervical, banda fibrosa ou processo transverso da sétima vértebra cervical alongado. Descrevemos os casos de duas mulheres (23 e 19 anos de idade com história de dor em membro superior direito, fraqueza e atrofia progressiva da musculatura intrínseca da mão. Estudos eletrofisiológicos mostraram diminuição da amplitude do potencial de ação muscular composto do nervo mediano e diminuição da amplitude do potencial de ação do nervo ulnar sensitivo. As velocidades de condução nervosa motora e sensitiva foram normais em ambos os casos. Eletromiografia de agulha mostrou desinervação crônica da musculatura intrínseca da mão direita de ambas as pacientes. Investigação radiológica mostrou costelas cervicais em um caso e processos transversos da sétima vértebra cervical alongados no outro. São revisados os aspectos clínicos, eletrofisiológicos e tratamento da síndrome.

  11. North Atlantic deep water in the south-western Indian Ocean

    Science.gov (United States)

    van Aken, Hendrik M.; Ridderinkhof, Herman; de Ruijter, Wilhelmus P. M.

    2004-06-01

    The circulation of deep water in the south-western Indian Ocean has been studied from hydrographic observations and current measurements, obtained during the Dutch-South African Agulhas Current Sources Experiment programme, and from similar public data from the World Ocean Circulation Experiment. The three major water masses involved are the saline North Atlantic deep water (NADW), its derivative in the Antarctic circumpolar current, lower circumpolar deep water (LCDW), and the aged variety of deep water, North Indian deep water (NIDW). Although bound by the shallow topography near Madagascar, about 2×10 6 m 3/s from the upper half of the NADW core appears to flow across the sill in the Mozambique Channel into the Somali Basin, while the remaining NADW flows east at about 45°S and is transformed to LCDW by lateral and diapycnal mixing. East of Madagascar the deep circulation is dominated by the southward flow of NIDW. Northward inflow of LCDW into the Indian Ocean therefore can take place only in the eastern half of the Indian Ocean, along the Southeast Indian Ridge and the Ninetyeast Ridge.

  12. Mozambique Channel eddies in GCMs: A question of resolution and slippage

    Science.gov (United States)

    Quartly, G. D.; de Cuevas, B. A.; Coward, A. C.

    2013-03-01

    Hydrographic observations in the 21st century have shown that the flow within the Mozambique Channel is best described by a series of large poleward-propagating anticyclonic eddies, rather than, as previously thought, a continuous intense western boundary current. The portrayal of this region in various runs of the NEMO 75-level model is found to vary between those two descriptions depending upon the resolution used and the implementation of the model's lateral boundary conditions. In a comparison of 1/4° resolution runs, the change of these conditions from free-slip to no-slip leads to the mean southward flow moving further offshore, with greater variability in the zonal and meridional velocities as the flow organises itself into eddies, and a reduction in total transport. If a realization of a model is unable to get these aspects of the physical flow correct, then this will significantly reduce its ability to show a realistic biological signal or long-term response to climate change. Further south, beyond Durban, the application of no-slip conditions similarly causes the mean Agulhas Current to lie further offshore, making it much more able to simulate Natal Pulses.

  13. The role of pioneers as indicators of biogeographic range expansion caused by global change in southern African coastal waters

    Science.gov (United States)

    Whitfield, Alan K.; James, Nicola C.; Lamberth, Stephen J.; Adams, Janine B.; Perissinotto, Renzo; Rajkaran, Anusha; Bornman, Thomas G.

    2016-04-01

    The South African coastline is just over 3000 km in length yet it covers three major biogeographic regions, namely subtropical, warm temperate and cool temperate. In this review we examine published information to assess the possible role of climate change in driving distributional changes of a wide variety of organisms around the subcontinent. In particular we focus on harmful algal blooms, seaweeds, eelgrass, mangroves, salt marsh plants, foraminiferans, stromatolites, corals, squid, zooplankton, zoobenthos, fish, birds, crocodiles and hippopotamus, but also refer to biota such as pathogens, coralline algae, jellyfish and otters. The role of pioneers or propagules as indicators of an incipient range expansion are discussed, with mangroves, zoobenthos, fishes and birds providing the best examples of actual and imminent distributional changes. The contraction of the warm temperate biogeographic region, arising from the intrusion of cool upwelled waters along the Western Cape shores, and increasingly warm Agulhas Current waters penetrating along the eastern parts of the subcontinent, are highlighted. The above features provide an ideal setting for the monitoring of biotic drivers and responses to global climate change over different spatial and temporal scales, and have direct relevance to similar studies being conducted elsewhere in the world. We conclude that, although this review focuses mainly on the impact of global climate change on South African coastal biodiversity, other anthropogenic drivers of change such as introduced alien invasive species may act synergistically with climate change, thereby compounding both short and long-term changes in the distribution and abundance of indigenous species.

  14. Atividade antioxidante e toxicidade preliminar do extrato e frações obtidas das folhas e cascas do caule de Dasyphyllum tomentosum (Spreng. Cabrera

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    C.S. Paula

    2014-06-01

    Full Text Available Dasyphyllum tomentosum (Spreng. Cabrera, açucará ou espinho-de-agulha, pertence à família Asteraceae, a qual compreende muitas espécies com propriedades terapêuticas. O objetivo deste trabalho foi avaliar extratos e frações de folhas e de cascas do caule de D. tomentosum, com relação as atividade antioxidante, citotóxica e hemolítica em testes in vitro. Todas as amostras apresentaram atividade antioxidante pelo método de inibição de DPPH, com destaque para a fração acetato de etila obtida das folhas cuja atividade foi comparável à dos padrões ácido ascórbico e rutina. Com relação à redução do complexo fosfomolibdênio, observou-se que esta mesma fração foi semelhante somente a rutina enquanto a fração obtida das cascas do caule apresentou resultado superior. Não foi observada atividade citotóxica e hemolítica frente aos modelos utilizados com os extratos e frações. Os resultados obtidos demonstram o potencial antioxidante da espécie sem apresentar toxicidade.

  15. A new concept for an old instrument: flexible corneal scrapping spatula Um novo conceito para um antigo instrumento: espátula corneana flexível

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    Acacio Lima Filho

    1999-12-01

    Full Text Available We describe a new methods to produce an instrument to scrap the cornea. It is made from either a fine needle or a cannula. The material is flattened by means of a laminator or a hammer and a flat metal surface. A sandpaper is used to rough the front end and round it. The tip is slightly bent and the device is submitted to ethylene oxide for sterilization. A handle may be used to hold the instrument, which may be reusable, after washing and sterilization using local heat at the tip, or gas.Os autores descrevem um novo método para produzir um instrumento para colheita de material de córnea. Tal instrumento pode ser manufaturado com uma cânula ou agulha fina. O material é moldado de forma plana com o auxílio de um laminador, ou de um martelo e placa de metal. Lixa fina é utilizada para arredondar as bordas e a ponta é ligeiramente dobrada. Um cabo pode ser adicionado de modo a facilitar a manipulação do instrumento, que pode ser reutilizado após lavagem e esterilização local na ponta do metal, ou por óxido de etileno.

  16. Modern average global sea-surface temperature

    Science.gov (United States)

    Schweitzer, Peter N.

    1993-01-01

    The data contained in this data set are derived from the NOAA Advanced Very High Resolution Radiometer Multichannel Sea Surface Temperature data (AVHRR MCSST), which are obtainable from the Distributed Active Archive Center at the Jet Propulsion Laboratory (JPL) in Pasadena, Calif. The JPL tapes contain weekly images of SST from October 1981 through December 1990 in nine regions of the world ocean: North Atlantic, Eastern North Atlantic, South Atlantic, Agulhas, Indian, Southeast Pacific, Southwest Pacific, Northeast Pacific, and Northwest Pacific. This data set represents the results of calculations carried out on the NOAA data and also contains the source code of the programs that made the calculations. The objective was to derive the average sea-surface temperature of each month and week throughout the whole 10-year series, meaning, for example, that data from January of each year would be averaged together. The result is 12 monthly and 52 weekly images for each of the oceanic regions. Averaging the images in this way tends to reduce the number of grid cells that lack valid data and to suppress interannual variability.

  17. Eastern South African hydroclimate over the past 270,000 years

    Science.gov (United States)

    Simon, Margit H.; Ziegler, Martin; Bosmans, Joyce; Barker, Stephen; Reason, Chris J. C.; Hall, Ian R.

    2015-12-01

    Processes that control the hydrological balance in eastern South Africa on orbital to millennial timescales remain poorly understood because proxy records documenting its variability at high resolution are scarce. In this work, we present a detailed 270,000 year-long record of terrestrial climate variability in the KwaZulu-Natal province based on elemental ratios of Fe/K from the southwest Indian Ocean, derived from X-ray fluorescence core scanning. Eastern South African climate variability on these time scales reflects both the long-term effect of regional insolation changes driven by orbital precession and the effects associated with high-latitude abrupt climate forcing over the past two glacial-interglacial cycles, including millennial-scale events not previously identified. Rapid changes towards more humid conditions in eastern South Africa as the Northern Hemisphere entered phases of extreme cooling were potentially driven by a combination of warming in the Agulhas Current and shifts of the subtropical anticyclones. These climate oscillations appear coherent with other Southern Hemisphere records but are anti-phased with respect to the East Asian Monsoon. Numerical modelling results reveal that higher precipitation in the KwaZulu-Natal province during precession maxima is driven by a combination of increased local evaporation and elevated moisture transport into eastern South Africa from the coast of Mozambique.

  18. Out of the Pacific and back again: insights into the matrilineal history of Pacific killer whale ecotypes.

    Directory of Open Access Journals (Sweden)

    Andrew D Foote

    Full Text Available Killer whales (Orcinus orca are the most widely distributed marine mammals and have radiated to occupy a range of ecological niches. Disparate sympatric types are found in the North Atlantic, Antarctic and North Pacific oceans, however, little is known about the underlying mechanisms driving divergence. Previous phylogeographic analysis using complete mitogenomes yielded a bifurcating tree of clades corresponding to described ecotypes. However, there was low support at two nodes at which two Pacific and two Atlantic clades diverged. Here we apply further phylogenetic and coalescent analyses to partitioned mitochondrial genome sequences to better resolve the pattern of past radiations in this species. Our phylogenetic reconstructions indicate that in the North Pacific, sympatry between the maternal lineages that make up each ecotype arises from secondary contact. Both the phylogenetic reconstructions and a clinal decrease in diversity suggest a North Pacific to North Atlantic founding event, and the later return of killer whales to the North Pacific. Therefore, ecological divergence could have occurred during the allopatric phase through drift or selection and/or may have either commenced or have been consolidated upon secondary contact due to resource competition. The estimated timing of bidirectional migration between the North Pacific and North Atlantic coincided with the previous inter-glacial when the leakage of fauna from the Indo-Pacific into the Atlantic via the Agulhas current was particularly vigorous.

  19. Manejo de resíduos gerados na assistência domiciliar pela Estratégia de Saúde da Familia

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    Sergiane Bisinoto Alves

    2012-02-01

    Full Text Available O estudo objetivou analisar o manejo dos resíduos gerados pela assistência domiciliar. A coleta de dados ocorreu pela observação da assistência prestada pelos profissionais e usuários e/ou cuidadores. Os dados foram registrados em check list construído conforme recomendações da RDC 306. Os resíduos gerados foram: seringas (38,1%, agulhas (36,5%, esparadrapos (31,7%, gazes (31,7% e lancetas (28,5%. Os resíduos do grupo A não foram segregados em todas as oportunidades e os do grupo E foram segregados 100% e 10,5% pelos profissionais e usuários, respectivamente. Conclui-se que, diante das inadequações encontradas, é necessária uma ampla discussão coletiva para a proposta de políticas públicas que atendam às especificidades do manejo dos resíduos de serviços de saúde nos domicílios, com intuito de dar segurança aos trabalhadores, comunidade e ambiente.

  20. Seasonal and diurnal variation of lightning activity over southern Africa and correlation with European whistler observations

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    A. B. Collier

    2006-03-01

    Full Text Available Lightning Imaging Sensor (LIS data have been analysed to ascertain the statistical pattern of lightning occurrence over southern Africa. The diurnal and seasonal variations are mapped in detail. The highest flash rates (107.2 km-2 y-1 occur close to the equator but maxima are also found over Madagascar (32.1 km-2 y-1 and South Africa (26.4 km-2 y-1. A feature of the statistics is a relatively steady contribution from over the ocean off the east coast of South Africa that appears to be associated with the Agulhas current.

    Lightning statistics are of intrinsic meteorological interest but they also relate to the occurrence of whistlers in the conjugate region. Whistler observations are made at Tihany, Hungary. Statistics reveal that the period of most frequent whistler occurrence does not correspond to the maximum in lightning activity in the conjugate region but is strongly influenced by ionospheric illumination and other factors. The whistler/flash ratio, R, shows remarkable variations during the year and has a peak that is narrowly confined to February and March.

  1. CARACTERIZACIÓN FÍSICO-MECÁNICA DE UN ALMIDÓN TERMOPLÁSTICO (TPS DE YUCA Y ANÁLISIS INTERFACIAL CON FIBRAS DE FIQUE CARACTERIZAÇÃO FÍSICO-MECÂNICO DE UM AMIDO TERMOPLÁSTICO (TPS DE MANDIOCA E ANÁLISE INTERFACIAL DE FIBRAS DE FIQUE PHYSICO-MECHANICAL CHARACTERIZATION OF THERMOPLASTIC CASSAVA STARCH (TPS AND INTERFACIAL ANALYSIS WITH FIQUE FIBERS

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    JOSE H. MINA H.

    2012-12-01

    Full Text Available Con el fin de estimar la factibilidad de reforzar una matriz de almidón termoplástico (TPS con fibras de Fique, se efectuaron pruebas de micro-mecánica mediante la técnica de zafado de una fibra (pull-out. El TPS se obtuvo a partir de la plastificación, con glicerol, de un almidón nativo de yuca (Manihot sculenta Crantz, empleando un proceso de extrusión. Para estimar la resistencia cortante interfacial (RCI se utilizaron tanto fibras de Fique nativas como modificadas superficialmente, a partir de un tratamiento alcalino. Para la preparación de los especímenes de ensayo el TPS fue peletizado, molido y posteriormente conformado en forma de placas siguiendo un proceso de moldeo por compresión; el material fue acondicionado a 25°C y 54% de humedad relativa, antes de su caracterización físico-química y mecánica. Se encontró que el TPS presentó una absorción de humedad en el equilibrio del orden del 10.5% y resistencia máxima, módulo de elasticidad y deformación a tensión de 1.5 MPa, 42.5 MPa y 26%, respectivamente. Por otro lado, se llegó a que la resistencia cortante interfacial (RCI entre el TPS y las fibras aumentó con el tratamiento superficial del Fique, debiéndose esto al aumento de rugosidad alcanzado con la alcalinización.A fim de estimar-se a viabilidade de reforçar a matriz de amido termoplástico (TPS com fibras de Fique, foram testados usando técnica de micro-mecânico (pull-out. TPS foi obtido a partir de plastificação, com o glicerol, um amido nativo de mandioca (manihot sculenta Crantz utilizando um processo de extrusão. Para estimar a resistência ao cisalhamento interfacial (RCI foram utilizadas fibras nativas e fique superfície modificada, a partir de um tratamento alcalino. Para a preparação das amostras de teste TPS foi peletizado, moído e, em seguida, moldagem sob a forma de placas como um processo de moldagem por compressão, o material foi condicionado a 25°C e 54% umidade relativa HR, antes

  2. Acidentes ocupacionais por exposição a material biológico entre a equipe multiprofissional do atendimento pré-hospitalar Accidentes ocupacionales por exposición a material biológico entre el equipo multiprofesional de atención pre hospitalaria Occupational accidents due to exposure to biological material in the multidisciplinary team of the emergency service

    Directory of Open Access Journals (Sweden)

    Adriana Cristina Oliveira

    2009-09-01

    Full Text Available Estudo transversal, tipo survey, realizado com a equipe multiprofissional de Atendimento Pré-hospitalar (APh de Belo Horizonte, entre junho e dezembro de 2006. Objetivou-se determinar a incidência dos acidentes ocupacionais por exposição a material biológico, condutas pós-acidente, e fatores demográficos determinantes. Utilizou-se questionário estruturado, análise descritiva, cálculo de incidências e regressão logística. A incidência de acidentes com material biológico foi de 20,6%: 40,8% por pérfuro-cortantes e 49,0% por fluidos corporais; 35,3% entre médicos e 24,0% entre enfermeiros. Condutas pós-acidente: sem avaliação médica, 63,3%; subnotificação, 81,6%; nenhuma conduta, 55,0%; e, sem acompanhamento sorológico, 61,2%. Estiveram associados ao acidente: tempo na instituição (Odds ratio-OR 2,84; Intervalo de confiança-IC 95% 1,22-6,62, lotação na Unidade de Suporte Avançado (OR 4,18; IC 95% 1,64-10,64; interação: tempo na instituição e lotação na Unidade de Suporte Básico (OR 0,27; IC 95% 0,07-1,00. Sugere-se a implantação de protocolos pós-acidentes, visando a sua redução; a subnotificação e o aumento do acompanhamento pós-acidente.Estudio transversal, tipo survey, realizado con el equipo multiprofesional de Atención Pre Hospitalaria (APh de Belo Horizonte entre junio y diciembre de 2006. Se objetivó determinar la incidencia de los accidentes ocupacionales por exposición a material biológico, las conductas después del accidente y los factores demográficos determinantes. Se utilizó un cuestionario estructurado, el análisis descriptivo, el cálculo de incidencias y la regresión logística. La incidencia de accidentes con material biológico fue de 20,6%: 40,8% por punzo cortantes y 49,0% fluidos corporales; 35,3% entre médicos y 24,0% entre enfermeros. Conductas después del accidente: sin evaluación médica, 63,3%; subnotificación, 81,6%; ninguna conducta, 55,0%; y, sin acompa

  3. Efeito da acupuntura na melhora da dor, sono e qualidade de vida em pacientes fibromiálgicos: estudo preliminar Effect of acupuncture on pain, sleep and quality of life improvement in fibromyalgia patients: preliminary study

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    Raymond S. Takiguchi

    2008-09-01

    Full Text Available A fibromialgia é uma síndrome definida por dor crônica generalizada e em pelo menos 11 dos 18 tender points, pontos dolorosos específicos. Este ensaio clínico randômico visou verificar a eficácia da acupuntura na melhora da dor, sono e qualidade de vida de pacientes fibromiálgicas. Dentre 20 mulheres com média de idade 44 anos, com diagnóstico de fibromialgia segundo critérios do Colégio Americano de Reumatologia, finalizaram o estudo 12, distribuídas aleatoriamente em dois grupos: A (GA, n=5, que recebeu acupuntura segundo a medicina tradicional chinesa; e B (GB, n=7, que teve a inserção de agulhas nos tender points base do occipital, trapézio, supraespinhoso e epicôndilo lateral. A dor foi avaliada por escala visual analógica e dolorimetria; o sono, pelo Inventário do Sono; e a qualidade de vida, pelo Questionário de Impacto da Fibromialgia (QIF. Os grupos receberam acupuntura uma vez por semana, durante oito semanas, com inserção de oito agulhas por 25 minutos. Os dados foram tratados estatisticamente, adotando-se o nível de significância ±=0,05. No GA, houve melhora estatisticamente significante do sono; e no GB, na dor, limiar de dor nos tender points, no sono e nos itens do QIF dor, cansaço matinal, ansiedade e depressão (pFibromyalgia is a syndrome defined by chronic widespread pain and sensitivity to pressure at at least 11 of 18 tender points. The aim of this random blind clinical trial was to assess the effectiveness of acupuncture on pain relief, on quality of sleep and life in fibromyalgia patients. From 20 female fibromyalgic patients (diagnosed according to the American College of Rheumatology, mean aged 44 years, 12 completed the study, randomly assigned into two groups: group A (GA, n=5 received acupuncture according to the traditional Chinese medicine; and group B (GB, n=7 received acupuncture at eight tender points: at the occiput, trapezius muscle, supraspinatus muscle, and lateral epicondyle. Pain

  4. Inventário de ciclo de vida da manufatura de seringas odontológicas Life cycle inventory of dental syringes

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    Biagio F. Giannetti

    2008-01-01

    Full Text Available Uma das formas mais integradas, completas e eficazes para a gestão ambiental de atividades produtivas é baseada no ciclo de vida do produto, sendo a Avaliação do Ciclo de Vida sua principal ferramenta. O produto avaliado é a seringa odontológica tipo Carpule. O objetivo é a realização do Inventário de Ciclo de Vida (ICV simplificado da fabricação de seringas odontológicas tipo Carpule, visando quantificar o uso de energia elétrica e a emissão de resíduos sólidos desde a mineração até o descarte do produto. A estrutura metodológica está baseada nas normas da série NBR ISO 14.040 e ISO 14.040. As fronteiras do estudo incluem as etapas de mineração, beneficiamento e manufatura; a produção do polietileno que compõe o tubete e a embalagem da agulha; a produção do aço, utilizado na fabricação da agulha, e o uso do conjunto pelos dentistas. A unidade funcional utilizada é 10(6 (um milhão de anestesias aplicadas. Na avaliação de melhorias, as soluções propostas permitem reduzir o consumo de energia elétrica em aproximadamente 20% na etapa de manufatura. A quantidade de resíduos sólidos pode ser reduzida de 40% na etapa de manufatura, o que corresponde a aproximadamente 6,50% do total de resíduos sólidos no ciclo de vida da seringa odontológica.Among the methods proposed to environmental management of productive activities, Life Cycle Assessment is one of the most integrated, complete and efficacious. The product assessed is the dental carpule syringe. The aim of this work is to to perform a Streamlined Life Cycle Inventory (LCI to quantify the electric energy consumption and the solid waste release from dental carpule syringes manufacture. The methodological structure is based on NBR ISO 14.040 and ISO 14.040 series. The LCI covers the syringe life cycle from mining to disposal. The limits of the system include the stages of copper and zinc mining and ore beneficiation; the production of polyethylene used for

  5. Avaliação de uma estratégia para ampliar a adesão ao rastreamento do câncer de mama no Nordeste brasileiro Evaluation of a strategy adopted to expand adherence to breast cancer screening in Brazilian Northeast

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    Alana Soares Brandão Barreto

    2012-02-01

    Full Text Available OBJETIVO: Avaliar as ações do Programa "Um Beijo Pela Vida", desenvolvido em um município do Nordeste brasileiro visando ampliar a adesão ao rastreamento do câncer de mama em mulheres cadastradas pela Estratégia Saúde da Família. MÉTODOS: Utilizou-se abordagem quantitativa para avaliar a cobertura das ações de rastreamento nas mulheres com 40 anos de idade ou mais. Foi realizada busca ativa das mulheres por agentes comunitários de saúde das nove Equipes de Saúde da Família do município. Os percentuais das mulheres submetidas ao exame clínico das mamas e à mamografia; de exames na faixa etária recomendada pelo Programa; da classificação das lesões mamográficas, de acordo com o BI-RADS®; das mulheres que receberam encaminhamento para diagnóstico e tratamento e o número de casos de câncer de mama detectados foram colhidos por meio de um questionário estruturado, analisados pelo programa EPI-INFO TM e confrontados a padrões previamente fixados. RESULTADOS: Foram incluídas 3.608 mulheres, correspondendo a 68,4% da população-alvo inscrita na Estratégia Saúde da Família. As taxas de cobertura do exame clínico das mamas para mulheres de 40 a 49 anos e da mamografia para mulheres de 50 a 69 anos foram de 58,9 e 56,7%, respectivamente. As mulheres com lesões mamográficas altamente suspeitas foram submetidas à punção por agulha fina ou por agulha grossa (100%. Seis casos novos de câncer foram detectados. Foram cumpridos 80% dos padrões analisados. CONCLUSÕES: A avaliação das ações do Programa aponta para sua adequação, considerando-se o grau de cumprimento das exigências previamente definidas.PURPOSE: To evaluate the actions of the "Um Beijo Pela Vida" Program developed in a Brazilian Northeast city to increase adherence to breast cancer screening by women registered by the Brazilian Family Health Strategy for breast cancer screening. METHODS: A quantitative approach was used to evaluate the coverage of

  6. Risco de infecção pelo vírus da imunodeficiência humana (HIV em profissionais da saúde Risk of infection by the human immune deficiency virus (HIV among health professionals

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    Alcyone Artioli Machado

    1992-02-01

    Full Text Available A fim de investigar o risco ocupacional de infecção pelo vírus da imunodeficiência humana (HIV em profissionais da saúde, foram estudados 35 casos de acidentes com material potencialmente contaminado pelo HIV, ocorridos em funcionários do Hospital das Clínicas da Faculdade de Medicina de Ribeirão Preto da Universidade de São Paulo (HCFMRP-USP. Dos 36 profissionais de saúde estudados, 52,8% (19/36 eram auxiliares de enfermagem, 19,4% (7/36 enfermeiras, 13,9% (5/36 atendentes de enfermagem, e 5,5% (2/36 técnicos de enfermagem. Em 47,2% (17/36 dos casos houve exposição parenteral a sangue (acidente com agulha. As mãos e os dedos foram as áreas do corpo mais atingida. Foi empregado o teste imunoenzimático (ELISA para detecção de anticorpos anti-HIV, sendo realizado em todos os profissionais por ocasião do acidente e com 1,2, 6 e 12 meses após a exposição. Os resultados foram negativos não sendo registrada nenhuma soroconversão. Recomenda-se que a educação continuada para o trabalhador de saúde deve reforçar o uso das precauções universais, especialmente os cuidados com agulhas e outros instrumentos perfurantes.To investigate the occupational risk of infection by HIV among health professionals, 36 cases of occupational accidents involving exposure to material potentially infected with HIV, reported at a Brazilian General Hospital (HCFMRP, were studied. Of the injured workers 75% were female and 25% male (ranging from 23 to 49 years old and just one of them had high-risk behavior of HIV infection. Of these health professionals, 52.8% were nursing auxiliaries, 19.4%, nurses, 13.9%, nursing attendants, 5.5%, laboratory technicians, 2.8% surgery instrumentalist, 2.8% accountants and 2.8% nursing technicians. In 47.2% of cases the workers had a parenteral exposure to blood (needlestick injuries. The right hand and fingers were the body areas most effected. The serologic test to detect HIV antibodies by the ELISA method was

  7. Efficacy of electroacupuncture for myofascial pain in the upper trapezius muscle: a case series Eficácia da eletroacupuntura para dor miofascial do músculo trapézio: uma série de casos

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    Maria F. M. Aranha

    2011-10-01

    Full Text Available BACKGROUND: Electroacupunture (EA includes the passage of an electrical current through the acupuncture needle and is commonly used for pain relief. OBJECTIVE: To evaluate the EA treatment effects for myofascial pain in the upper trapezius muscle. METHODS: Twenty women aged ranging from 18 to 40 years (mean=24.95; SD=5.88 years, with a body mass index ranging from 19 to 25 kg/m2 (mean=22.33; SD=0.56 kg/m2, with regular menstrual cycles controlled by oral contraceptive, local or referred pain for more than six months and at least one myofascial trigger point in the upper trapezius participated in this study. The participants received a total of nine EA sessions over five weeks. The needles were inserted at the accupoints GB20, GB21, LV3, LI4, and at “ashi” points. A mixed current of 2 Hz and 100 Hz was applied alternatively every 5 seconds for 30 minutes. The outcomes were pain intensity measured by the visual analogue scale (VAS, pressure pain threshold (PPT measured by an algometer, electromyography (EMG and quality of life measured by the SF-36 questionnaire. Inter-occurrences between sessions were monitored. Paired t-test, Wilcoxon test, and repeated measure analysis of variance (ANOVA having Tukey-Kramer as post-hoc tests were used. RESULTS: Significant improvement in pain intensity and in PPT occurred after treatment (PCONTEXTUALIZAÇÃO: A eletroacupuntura (EA inclui a passagem de uma corrente elétrica pela agulha de acupuntura e é comumente utilizada para aliviar a dor. OBJETIVO: Avaliar o efeito da EA no tratamento da dor miofascial do músculo trapézio superior. MÉTODOS: Participaram 20 voluntárias com idade entre 18 e 40 anos (24,95±5,88 anos, índice de massa corpórea entre 19 e 25 kg/m2 (22,33±0,56 kg/m2, ciclo menstrual regulado por anticoncepcionais, dor por mais de seis meses no trapézio superior, com pelo menos um ponto gatilho miofascial. Nove sessões de EA foram agendadas, sendo duas por semana. As agulhas foram

  8. Esclerose de pequenos vasos venosos com corrente elétrica galvânica ponteada, em orelhas de coelhos Galvanic electric sharp stream and the sclerosis of marginal veins in the ear of rabbits

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    Sergio Santiago

    2001-12-01

    Full Text Available Foi idealizado e construido um aparelho que utiliza a corrente elétrica galvânica em baixa amperagem (100m A ,200m A, 300m A com o propósito de causar esclerose em vasos venosos de pequeno calibre, utilizando a veia marginal da orelha direita do coelho. O presente estudo buscou verificar em modelo experimental, o efeito da corrente elétrica galvânica em baixa amperagem. Foram utilizados 45 coelhos Nova Zelandia, distribuídos em 3 grupos de 15 animais , sendo utilizada a orelha esquerda como controle e a orelha direita como experimento. No grupo experimento os animais do grupo I foram submetidos à corrente elétrica galvânica de 100m A , no grupo II à 200m A, e no grupo III à 300m . No grupo controle, os animais foram submetidos somente ao procedimento mecânico de aplicação da agulha ao longo da veia marginal da orelha esquerda, sendo realizado uma, duas e três aplicações com intervalo de sete dias entre cada aplicação. Todos os animais foram avaliados quatorze dias após a última aplicação, em aspectos macro e microscópicos. Os resultados mostraram que, tanto a corrente elétrica galvânica em baixa amperagem, quanto o simples trauma mecânico da agulha, não são capazes de produzir esclerose na veia marginal da orelha do coelho que seja estatisticamente significante.Telangiectases, in accordance with current concepts, must be treated in a surgical way. The most commons surgicals treatments included the electrosurgery, electocauterization and electrolysis. The injury to the peripherical dermal tissue was a problem as the insatisfactory results in the vessels scleroses. Therefore, the aim of this study was estimated the value of one electrical device planned with care and exactness to provide a galvanic electric sharp stream to be used in a animal model. Thus, 45 white New Zealand adults male rabbits received a electrical galvanic pulse(marginal vein of the right ear or only the mechanical puncture(marginal vein of the left

  9. Transconjunctival retinopexy with active external drainage of subretinal fluid: a prospective pilot study of eight consecutive cases Retinopexia transconjuntival com drenagem externa do fluido sub-retiniano: um estudo piloto prospectivo de oito casos consecutivos

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    Rubens Camargo Siqueira

    2007-08-01

    -retiniano. A drenagem externa transconjuntival do fluido sub-retiniano foi realizada com agulha calibre 29 colocada no espaço sub-retiniano e moni torada pela oftalmoscopia binocular indireta. A sucção ativa foi realizada (vácuo de 500 mmHg usando a linha de extração do vitreófago conectado a agulha. Após a colagem da retina, crioterapia foi aplicada na região escleral correspondente a área da(s ruptura(s. RESULTADOS: Em todos os casos a retina aplicou no final da cirurgia. O redescolamento da retina ocorreu em 4 pacientes pseudofácicos, que foram submetidos a seguir a vitrectomia pars plana. Os 4 pacientes fácicos mantiveram a retina aplicada durante o seguimento (13 a 20 meses. CONCLUSÃO: A retinopexia transconjuntival com drenagem externa ativa do fluido sub-retiniano representa alternativa útil, rápida e barata a cirurgia do descolamento da retina com implante escleral em pacientes com nenhuma ou mínima vitreorretinopatia proliferativa, fácicos e diferente do implante escleral não está associada a indução da miopia.

  10. Perfil e distribuição da síndrome cólica em eqüinos em três unidades militares do Estado do Rio de Janeiro, Brasil Profile and distribution of equine colic syndrome in three military units in Rio de Janeiro, Brazil

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    Paula Vieira Evans Hossell Laranjeira

    2009-07-01

    Full Text Available Este estudo teve como objetivo avaliar o perfil e a distribuição da síndrome cólica em eqüinos de três unidades militares no Estado do Rio de Janeiro, o Regimento Escola de Cavalaria (REsC, a Academia Militar das Agulhas Negras (AMAN e o Esquadrão Escola de Cavalaria (EEC. No período entre 2003 e 2004, 770 eqüinos foram acompanhados para a ocorrência de casos clínicos de cólica. Realizou-se análise descritiva dos dados, e foram calculadas a taxa de incidência de cólica e a proporção de eqüinos acometidos. O teste do χ2 foi utilizado para avaliar a associação entre síndrome cólica e variáveis relativas às características dos eqüinos e do manejo. A incidência variou entre as unidades militares, 0,12 na AMAN, 0,21 no EEC e 0,95 casos/eqüino-ano no REsC, sendo acometidos 15% dos eqüinos da AMAN, 30% do EEC e 69% do REsC. A maior incidência foi de episódios de origem gástrica, 76,5%. Casos de reincidência foram elevados, sendo 62,5% no REsC, 36,7% na AMAN e 29,0% no EEC. A síndrome cólica estava significativamente associada às variáveis unidade militar, sistema de criação, quantidade de grãos ingerido e suplemento mineral-vitamínico. As altas incidências, reincidências e proporção de animais acometidos observadas ocorreram de forma diferenciada nas três unidades, indicando que, apesar de possuírem como característica comum pertencerem a unidades militares, os eqüinos formam um grupo heterogêneo no que diz respeito à ocorrência de síndrome cólica, provavelmente devido às diferentes condições de manejo.This research aimed to verify the profile and distribution of colic syndrome in horses of three military units in Rio de Janeiro, Brazil, which were Regimento Escola de Cavalaria (REsC, Academia Militar das Agulhas Negras (AMAN, and Esquadrão Escola de Cavalaria (EEC. From 2003 to 2004, 770 horses were followed up for the incidence of colic cases. A descriptive analysis of clinical data

  11. Mielose eritrêmica em um gato Erythremic myelosis in a cat

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    Danieli Brolo Martins

    2011-01-01

    Full Text Available Neste relato, é descrito um caso de mielose eritrêmica em um gato. Essa doença é considerada de aparecimento raro na clínica médica veterinária. Uma gata, raça Siamês, de um ano de idade, foi atendida com sinais clínicos de acentuada anemia, emaciação e febre. Havia marcada anemia arregenerativa, com grande número de precursores eritróides e megaloblastos atípicos, identificados pelo hemograma. O mielograma revelou população eritrocitária acima de 85%, quando comparada com a mielóide. A citologia aspirativa por agulha fina dos linfonodos revelou a presença de células eritróides imaturas. Na necropsia, o baço, os linfonodos e a medula óssea estavam obliterados por células neoplásicas. O diagnóstico de mielose eritrêmica foi dado com base nos achados clínico-laboratoriais e anatomopatológicos.The aim of this research is to describe a case of erythremic myelosis in a cat. This disease is considered rare in veterinary clinics. A one-year-old female siamese cat was brought to the veterinary hospital with clinical signs of severe anemia, emaciation and fever. The blood panel revealed marked nonregenerative anemia with elevated number of atypical erythroid progenitors and megacaryoblasts. Elevated atypical erythroid over myeloid precursors (above 85% were also found in bone marrow biopsy. Fine-needle aspiration cytology of lymph nodes revealed immature erythoid cells. At necropsy, spleen, lymph nodes and bone marrow were obliterated by neoplastic cells. The diagnosis of erythremic myelosis was given by clinical, laboratorial and pathological findings.

  12. The South Sandwich "Forgotten" Subduction Zone and Tsunami Hazard in the South Atlantic

    Science.gov (United States)

    Okal, E. A.; Hartnady, C. J. H.; Synolakis, C. E.

    2009-04-01

    While no large interplate thrust earthquakes are know at the "forgotten" South Sandwich subduction zone, historical catalogues include a number of events with reported magnitudes 7 or more. A detailed seismological study of the largest event (27 June 1929; M (G&R) = 8.3) is presented. The earthquake relocates 80 km North of the Northwestern corner of the arc and its mechanism, inverted using the PDFM method, features normal faulting on a steeply dipping fault plane (phi, delta, lambda = 71, 70, 272 deg. respectively). The seismic moment of 1.7*10**28 dyn*cm supports Gutenberg and Richter's estimate, and is 28 times the largest shallow CMT in the region. This event is interpreted as representing a lateral tear in the South Atlantic plate, comparable to similar earthquakes in Samoa and Loyalty, deemed "STEP faults" by Gover and Wortel [2005]. Hydrodynamic simulations were performed using the MOST method [Titov and Synolakis, 1997]. Computed deep-water tsunami amplitudes of 30cm and 20cm were found off the coast of Brazil and along the Gulf of Guinea (Ivory Coast, Ghana) respectively. The 1929 moment was assigned to the geometries of other know earthquakes in the region, namely outer-rise normal faulting events at the center of the arc and its southern extremity, and an interplate thrust fault at the Southern corner, where the youngest lithosphere is subducted. Tsunami hydrodynamic simulation of these scenarios revealed strong focusing of tsunami wave energy by the SAR, the SWIOR and the Agulhas Rise, in Ghana, Southern Mozambique and certain parts of the coast of South Africa. This study documents the potential tsunami hazard to South Atlantic shorelines from earthquakes in this region, principally normal faulting events.

  13. South Sandwich: The Forgotten Subduction Zone and Tsunami Hazard in the South Atlantic

    Science.gov (United States)

    Okal, E. A.; Hartnady, C. J.

    2008-12-01

    While no large interplate thrust earthquakes are known at the South Sandwich subduction zone, historical catalogues include a number of earthquakes with reported magnitudes of 7 or more. We present a detailed seismological study of the largest one (27 June 1929; M (G&R) = 8.3). The earthquake relocates 80 km North of the Northwestern corner of the arc. Its mechanism, inverted using the PDFM method, features normal faulting on a steeply dipping fault plane (phi, delta, lambda = 71, 70, 272 deg.). The seismic moment, 1.7 10**28 dyn*cm, supports Gutenberg and Richter's estimate, and is 28 times the largest shallow CMT in the region. The 1929 event is interpreted as representing a lateral tear in the South Atlantic plate, comparable to similar earthquakes in Samoa and Loyalty, deemed "STEP faults" by Gover and Wortel [2005]. Hydrodynamic simulations using the MOST method [Titov and Synolakis, 1997] suggest deep-water tsunami amplitudes reaching 30 cm off the coast of Brazil, where it should have had observable run-up, and 20 cm along the Gulf of Guinea (Ivory Coast, Ghana). We also simulate a number of potential sources obtained by assigning the 1929 moment to the geometries of other known earthquakes in the region, namely outer-rise normal faulting events at the center of the arc and its southern extremity, and an interplate thrust fault at the Southern corner, where the youngest lithosphere is subducted. A common feature of these models is the strong focusing of tsunami waves by the SAR, the SWIOR, and the Agulhas Rise, resulting in amplitudes always enhanced in Ghana, Southern Mozambique and certain parts of the coast of South Africa. This study documents the potential tsunami hazard to South Atlantic shorelines from earthquakes in this region, principally normal faulting events.

  14. Primary liver AIDS-related lympoma Linfoma não-Hodgkin primário do fígado em paciente com SIDA

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    María Florencia Villafañe

    2006-08-01

    Full Text Available Non-Hodgkin's lymphomas (NHL are the second most frequent malignancies in AIDS patients. The majority of NHL associated with AIDS involves extranodal sites, especially the digestive tract and the central nervous system. Primary liver lymphoma (PLL is an uncommon neoplasm among these patients. Ultrasonography and computed tomography scans may be helpful in the diagnosis of focal hepatic lymphoma. Image-guided fine-needle biopsy with histopathology of the liver lesions is the gold standard for the diagnosis of hepatic lymphoma. We report a case of PLL as the initial manifestation of AIDS in a patient without any previous infection by hepatitis C or B virus, presented as multiple and large hepatic masses.Os linfomas não-Hodgkin (LNH são as segundas neoplasias mais freqüentes nos pacientes com síndrome da imunodeficiência adquirida (SIDA. A maioria dos LNH associados à AIDS envolvem locais extra-ganglionares, especialmente o trato digestivo e o sistema nervoso central. O linfoma não-Hodgkin primário do fígado (LPF é uma neoplasia incomum nestes pacientes. A ultrassonografia (US e a tomografia computadorizada (TC podem ser úteis no diagnóstico de linfoma não-Hodgkin hepático apresentando-se como lesões multifocais. A biópsia com agulha fina guiada por imagens (US, TC juntamente com a histopatologia das lesões do fígado constitui o padrão-ouro para o diagnóstico de linfoma hepático. Este trabalho relata um caso de LPF como manifestação inicial de AIDS em um paciente sem infecção prévia pelo vírus da hepatite C e B, que se apresentou como massas hepáticas múltiplas e de grandes dimensões.

  15. Large-scale spatial distribution patterns of gastropod assemblages in rocky shores.

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    Patricia Miloslavich

    Full Text Available Gastropod assemblages from nearshore rocky habitats were studied over large spatial scales to (1 describe broad-scale patterns in assemblage composition, including patterns by feeding modes, (2 identify latitudinal pattern of biodiversity, i.e., richness and abundance of gastropods and/or regional hotspots, and (3 identify potential environmental and anthropogenic drivers of these assemblages. Gastropods were sampled from 45 sites distributed within 12 Large Marine Ecosystem regions (LME following the NaGISA (Natural Geography in Shore Areas standard protocol (www.nagisa.coml.org. A total of 393 gastropod taxa from 87 families were collected. Eight of these families (9.2% appeared in four or more different LMEs. Among these, the Littorinidae was the most widely distributed (8 LMEs followed by the Trochidae and the Columbellidae (6 LMEs. In all regions, assemblages were dominated by few species, the most diverse and abundant of which were herbivores. No latitudinal gradients were evident in relation to species richness or densities among sampling sites. Highest diversity was found in the Mediterranean and in the Gulf of Alaska, while highest densities were found at different latitudes and represented by few species within one genus (e.g. Afrolittorina in the Agulhas Current, Littorina in the Scotian Shelf, and Lacuna in the Gulf of Alaska. No significant correlation was found between species composition and environmental variables (r≤0.355, p>0.05. Contributing variables to this low correlation included invasive species, inorganic pollution, SST anomalies, and chlorophyll-a anomalies. Despite data limitations in this study which restrict conclusions in a global context, this work represents the first effort to sample gastropod biodiversity on rocky shores using a standardized protocol across a wide scale. Our results will generate more work to build global databases allowing for large-scale diversity comparisons of rocky intertidal assemblages.

  16. Modelled rainfall skill assessment against a 1000-year time/space isotope dendro-climatology for southern Africa

    Science.gov (United States)

    Woodborne, Stephan; Hall, Grant; Zhang, Qiong

    2016-04-01

    Palaeoclimate reconstruction using isotopic analysis of tree growth increments has yielded a 1000-year record of rainfall variability in southern Africa. Isotope dendro-climatology reconstructions from baobab trees (Adansonia digitata) provide evidence for rainfall variability from the arid Namib Desert and the Limpopo River Valley. Isotopic analysis of a museum specimen of a yellowwood tree (Podocarps falcatus) yields another record from the southwestern part of the subcontinent. Combined with the limited classic denro-climatologies available in the region these records yield palaeo-rainfall variability in the summer and winter rainfall zones as well as the hyper-arid zone over the last 1000 years. Coherent shifts in all of the records indicate synoptic changes in the westerlies, the inter-tropical convergence zone, and the Congo air boundary. The most substantial rainfall shift takes place at about 1600 CE at the onset of the Little Ice Age. Another distinctive feature of the record is a widespread phenomenon that occurs shortly after 1810 CE that in southern Africa corresponds with a widespread social upheaval known as the Difequane or Mfekane. Large scale forcing of the system includes sea-surface temperatures in the Agulhas Current, the El Nino Southern Oscillation and the Southern Annular Mode. The Little Ice Age and Mfekane climate shifts result from different forcing mechanisms, and the rainfall response in the different regions at these times do not have a fixed phase relationship. This complexity provides a good scenario to test climate models. A first order (wetter versus drier) comparison between each of the tree records and a 1000-year palaeoclimate model simulation for the Little Ice Age and Mfekane transitions demonstrates a generally good correspondence.

  17. Large-scale spatial distribution patterns of gastropod assemblages in rocky shores.

    Science.gov (United States)

    Miloslavich, Patricia; Cruz-Motta, Juan José; Klein, Eduardo; Iken, Katrin; Weinberger, Vanessa; Konar, Brenda; Trott, Tom; Pohle, Gerhard; Bigatti, Gregorio; Benedetti-Cecchi, Lisandro; Shirayama, Yoshihisa; Mead, Angela; Palomo, Gabriela; Ortiz, Manuel; Gobin, Judith; Sardi, Adriana; Díaz, Juan Manuel; Knowlton, Ann; Wong, Melisa; Peralta, Ana C

    2013-01-01

    Gastropod assemblages from nearshore rocky habitats were studied over large spatial scales to (1) describe broad-scale patterns in assemblage composition, including patterns by feeding modes, (2) identify latitudinal pattern of biodiversity, i.e., richness and abundance of gastropods and/or regional hotspots, and (3) identify potential environmental and anthropogenic drivers of these assemblages. Gastropods were sampled from 45 sites distributed within 12 Large Marine Ecosystem regions (LME) following the NaGISA (Natural Geography in Shore Areas) standard protocol (www.nagisa.coml.org). A total of 393 gastropod taxa from 87 families were collected. Eight of these families (9.2%) appeared in four or more different LMEs. Among these, the Littorinidae was the most widely distributed (8 LMEs) followed by the Trochidae and the Columbellidae (6 LMEs). In all regions, assemblages were dominated by few species, the most diverse and abundant of which were herbivores. No latitudinal gradients were evident in relation to species richness or densities among sampling sites. Highest diversity was found in the Mediterranean and in the Gulf of Alaska, while highest densities were found at different latitudes and represented by few species within one genus (e.g. Afrolittorina in the Agulhas Current, Littorina in the Scotian Shelf, and Lacuna in the Gulf of Alaska). No significant correlation was found between species composition and environmental variables (r≤0.355, p>0.05). Contributing variables to this low correlation included invasive species, inorganic pollution, SST anomalies, and chlorophyll-a anomalies. Despite data limitations in this study which restrict conclusions in a global context, this work represents the first effort to sample gastropod biodiversity on rocky shores using a standardized protocol across a wide scale. Our results will generate more work to build global databases allowing for large-scale diversity comparisons of rocky intertidal assemblages. PMID

  18. Ancient divergence in the trans-oceanic deep-sea shark Centroscymnus crepidater.

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    Regina L Cunha

    Full Text Available Unravelling the genetic structure and phylogeographic patterns of deep-sea sharks is particularly challenging given the inherent difficulty in obtaining samples. The deep-sea shark Centroscymnus crepidater is a medium-sized benthopelagic species that exhibits a circumglobal distribution occurring both in the Atlantic and Indo-Pacific Oceans. Contrary to the wealth of phylogeographic studies focused on coastal sharks, the genetic structure of bathyal species remains largely unexplored. We used a fragment of the mitochondrial DNA control region, and microsatellite data, to examine genetic structure in C. crepidater collected from the Atlantic Ocean, Tasman Sea, and southern Pacific Ocean (Chatham Rise. Two deeply divergent (3.1% mtDNA clades were recovered, with one clade including both Atlantic and Pacific specimens, and the other composed of Atlantic samples with a single specimen from the Pacific (Chatham Rise. Bayesian analyses estimated this splitting in the Miocene at about 15 million years ago. The ancestral C. crepidater lineage was probably widely distributed in the Atlantic and Indo-Pacific Oceans. The oceanic cooling observed during the Miocene due to an Antarctic glaciation and the Tethys closure caused changes in environmental conditions that presumably restricted gene flow between basins. Fluctuations in food resources in the Southern Ocean might have promoted the dispersal of C. crepidater throughout the northern Atlantic where habitat conditions were more suitable during the Miocene. The significant genetic structure revealed by microsatellite data suggests the existence of present-day barriers to gene flow between the Atlantic and Pacific populations most likely due to the influence of the Agulhas Current retroflection on prey movements.

  19. Ancient divergence in the trans-oceanic deep-sea shark Centroscymnus crepidater.

    Science.gov (United States)

    Cunha, Regina L; Coscia, Ilaria; Madeira, Celine; Mariani, Stefano; Stefanni, Sergio; Castilho, Rita

    2012-01-01

    Unravelling the genetic structure and phylogeographic patterns of deep-sea sharks is particularly challenging given the inherent difficulty in obtaining samples. The deep-sea shark Centroscymnus crepidater is a medium-sized benthopelagic species that exhibits a circumglobal distribution occurring both in the Atlantic and Indo-Pacific Oceans. Contrary to the wealth of phylogeographic studies focused on coastal sharks, the genetic structure of bathyal species remains largely unexplored. We used a fragment of the mitochondrial DNA control region, and microsatellite data, to examine genetic structure in C. crepidater collected from the Atlantic Ocean, Tasman Sea, and southern Pacific Ocean (Chatham Rise). Two deeply divergent (3.1%) mtDNA clades were recovered, with one clade including both Atlantic and Pacific specimens, and the other composed of Atlantic samples with a single specimen from the Pacific (Chatham Rise). Bayesian analyses estimated this splitting in the Miocene at about 15 million years ago. The ancestral C. crepidater lineage was probably widely distributed in the Atlantic and Indo-Pacific Oceans. The oceanic cooling observed during the Miocene due to an Antarctic glaciation and the Tethys closure caused changes in environmental conditions that presumably restricted gene flow between basins. Fluctuations in food resources in the Southern Ocean might have promoted the dispersal of C. crepidater throughout the northern Atlantic where habitat conditions were more suitable during the Miocene. The significant genetic structure revealed by microsatellite data suggests the existence of present-day barriers to gene flow between the Atlantic and Pacific populations most likely due to the influence of the Agulhas Current retroflection on prey movements. PMID:23145122

  20. Impact of eddy-permitting ocean resolution in a coupled climate model

    Science.gov (United States)

    Roberts, M.

    2003-04-01

    A global coupled atmosphere-ocean-sea-ice GCM with an eddy-permitting ocean (HadCEM) has now completed a 150 year control run and an 80 year idealised climate change run at the Hadley Centre, part of the UK Met Office. The model is a development of the successful HadCM3 model and uses exactly the same atmospheric and sea-ice components, with the ocean model having a full suite of physics and using a 1/3 degree resolution; parallel lower resolution experiments with 1.25 degree resolution ocean have also been completed. One region where the enhanced ocean resolution has an important impact on the surface climatology is the equatorial Pacific. Tropical instability waves represented by the model allow eddy heat fluxes to converge at the equator, lessening the cold bias commonly found in climate models. They may also impact on the strength of the equatorial undercurrent, which is significantly stronger in the high resolution model. Using simple downgradient flux arguments, the tropical instability waves cause mixing with a strength of over 10000 m2/s near the surface, reducing to 1000-3000 m2/s at depths above the equatorial undercurrent. Eddies formed in the Agulhas region of South Africa seem to play an important part in the large-scale freshwater budget of the Atlantic (and therefore possibly of the thermohaline circulation as a whole). The ocean freshwater transports in the Atlantic come closer to balancing those implied by atmospheric fluxes more quickly in the high resolution model, and this may be partly why the sensitivity of the thermohaline circulation in the high resolution coupled model to CO2 forcing is different from that shown by the lower resolution model.

  1. Asymmetry of high-velocity lower crust on the South Atlantic rifted margins and implications for the interplay of magmatism and tectonics in continental break-up

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    K. Becker

    2014-06-01

    Full Text Available High-velocity lower crust (HVLC and seaward dipping reflector sequences (SDRs are typical features of volcanic rifted margins. However, the nature and origin of HVLC is under discussion. Here we provide a comprehensive analysis of deep crustal structures in the southern segment of the South Atlantic and an assessment of HVLC along the margins. Two new seismic refraction lines off South America fill a gap in the data coverage and together with five existing velocity models allow a detailed investigation of the lower crustal properties on both margins. An important finding is the major asymmetry in volumes of HVLC on the conjugate margins. The seismic refraction lines across the South African margin reveal four times larger cross sectional areas of HVLC than at the South American margin, a finding that is in sharp contrast to the distribution of the flood basalts in the Paraná-Etendeka Large Igneous Provinces (LIP. Also, the position of the HVLC with respect to the seaward dipping reflector sequences varies consistently along both margins. Close to the Falkland-Agulhas Fracture Zone a small body of HVLC is not accompanied by seaward dipping reflectors. In the central portion of both margins, the HVLC is below the inner seaward dipping reflector wedges while in the northern area, closer to the Rio Grande Rise/Walvis Ridge, large volumes of HVLC extend far seawards of the inner seaward dipping reflectors. This challenges the concept of a simple extrusive/intrusive relationship between seaward dipping reflector sequences and HVLC, and it provides evidence for formation of the HVLC at different times during the rifting and break-up process. We suggest that the drastically different HVLC volumes are caused by asymmetric rifting in a simple shear dominated extension.

  2. Uso do ultra-som para punção venosa central em paciente obeso com adenomegalia cervical

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    Jaderson Wollmeister

    2008-08-01

    Full Text Available JUSTIFICATICA E OBJETIVOS: As técnicas clássicas para punção venosa central são realizadas com base em referências anatômicas de superfície e conhecimento da anatomia vascular da região em que se realizará a punção. O uso do ultra-som permite a realização da punção sob visão direta das estruturas vasculares, peri-vasculares e da agulha de punção. O objetivo deste relato foi descrever o uso do ultra-som no auxílio de acesso venoso central em paciente obeso e com adenomegalias. RELATO DO CASO: Paciente do sexo masculino, branco, 28 anos, 1,70 m, 120 kg, com diagnóstico de linfoma de Hodgkin esclerose nodular. Solicitado ao Serviço de Anestesiologia do Hospital Governador Celso Ramos, punção de veia jugular interna direita guiada por ultra-som devido à presença de gânglio supraclavicular que prejudicava a referência anatômica de punção e à obesidade do paciente. Após a obtenção da melhor imagem a veia jugular interna esquerda foi puncionada e colocado um cateter venoso de triplo lúmen. A punção foi única, com progressão fácil do cateter e realizada sem complicações. CONCLUSÕES: O uso da ultra-sonografia para punção venosa central pode evitar complicações tornando o procedimento mais seguro para o paciente.

  3. Linfoma de células fusiformes: relato anatomopatológico de um caso com apresentação pulmonar Spindle cell lymphoma: a case with pulmonary presentation

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    Túlio Geraldo de Souza e Souza

    2006-02-01

    Full Text Available São raros os linfomas que se apresentam com padrão histológico de células fusiformes. Relatamos um caso de tumor pulmonar isolado em homem de 74 anos, diagnosticado em biópsia de agulha como neoplasia maligna de células fusiformes. Na ocasião, o estudo imuno-histoquímico favoreceu pseudotumor inflamatório. Sete meses após, o paciente foi laparotomizado devido a tumor perfurado intestinal. Os estudos anatomopatológico e imuno-histoquímico estabeleceram o diagnóstico de linfoma B difuso de grandes células. A revisão do tumor pulmonar revelou positividade franca para CD45 e CD20, confirmando o diagnóstico de Linfoma B de células fusiformes. Esta publicação visa a alertar para essa incomum apresentação dos linfomas, que necessita ser considerada, no diagnóstico diferencial de neoplasias de células fusiformes.This paper reports a rare malignant lymphoma with histological spindle-cell pattern. Seventy four year-old man presented with lung tumor. A diagnostic of spindle-cell malignant neoplasia was made and immunohistochemical studies were suggestive of inflammatory pseudotumor. Three months later, the patient returned to our service with acute abdomen. The surgery showed small Intestinal perforation associated with tumor. Microscopic examination and immunohistochemical studies revealed Diffuse B-large cell lymphoma. After the diagnostic of the intestinal tumor, the lung tumor was reviewed, showing positivity for CD45 and CD20 antibodies. This result supports the diagnostic of Spindle B-cell lymphoma, in the lung tumor. The aim of this report is to alert pathologists about this rare spindle cell pattern presentation of lymphomas, that must be differentiated from true sarcomas and others spindle-cell neoplasias.

  4. Oceanographic Conditions Limit the Spread of a Marine Invader along Southern African Shores.

    Science.gov (United States)

    Assis, Jorge; Zupan, Mirta; Nicastro, Katy R; Zardi, Gerardo I; McQuaid, Christopher D; Serrão, Ester A

    2015-01-01

    Invasive species can affect the function and structure of natural ecological communities, hence understanding and predicting their potential for spreading is a major ecological challenge. Once established in a new region, the spread of invasive species is largely controlled by their dispersal capacity, local environmental conditions and species interactions. The mussel Mytilus galloprovincialis is native to the Mediterranean and is the most successful marine invader in southern Africa. Its distribution there has expanded rapidly and extensively since the 1970s, however, over the last decade its spread has ceased. In this study, we coupled broad scale field surveys, Ecological Niche Modelling (ENM) and Lagrangian Particle Simulations (LPS) to assess the current invaded distribution of M. galloprovincialis in southern Africa and to evaluate what prevents further spread of this species. Results showed that all environmentally suitable habitats in southern Africa have been occupied by the species. This includes rocky shores between Rocky Point in Namibia and East London in South Africa (approx. 2800 km) and these limits coincide with the steep transitions between cool-temperate and subtropical-warmer climates, on both west and southeast African coasts. On the west coast, simulations of drifting larvae almost entirely followed the northward and offshore direction of the Benguela current, creating a clear dispersal barrier by advecting larvae away from the coast. On the southeast coast, nearshore currents give larvae the potential to move eastwards, against the prevalent Agulhas current and beyond the present distributional limit, however environmental conditions prevent the establishment of the species. The transition between the cooler and warmer water regimes is therefore the main factor limiting the northern spread on the southeast coast; however, biotic interactions with native fauna may also play an important role. PMID:26114766

  5. Oceanographic Conditions Limit the Spread of a Marine Invader along Southern African Shores.

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    Jorge Assis

    Full Text Available Invasive species can affect the function and structure of natural ecological communities, hence understanding and predicting their potential for spreading is a major ecological challenge. Once established in a new region, the spread of invasive species is largely controlled by their dispersal capacity, local environmental conditions and species interactions. The mussel Mytilus galloprovincialis is native to the Mediterranean and is the most successful marine invader in southern Africa. Its distribution there has expanded rapidly and extensively since the 1970s, however, over the last decade its spread has ceased. In this study, we coupled broad scale field surveys, Ecological Niche Modelling (ENM and Lagrangian Particle Simulations (LPS to assess the current invaded distribution of M. galloprovincialis in southern Africa and to evaluate what prevents further spread of this species. Results showed that all environmentally suitable habitats in southern Africa have been occupied by the species. This includes rocky shores between Rocky Point in Namibia and East London in South Africa (approx. 2800 km and these limits coincide with the steep transitions between cool-temperate and subtropical-warmer climates, on both west and southeast African coasts. On the west coast, simulations of drifting larvae almost entirely followed the northward and offshore direction of the Benguela current, creating a clear dispersal barrier by advecting larvae away from the coast. On the southeast coast, nearshore currents give larvae the potential to move eastwards, against the prevalent Agulhas current and beyond the present distributional limit, however environmental conditions prevent the establishment of the species. The transition between the cooler and warmer water regimes is therefore the main factor limiting the northern spread on the southeast coast; however, biotic interactions with native fauna may also play an important role.

  6. Zooplankton of West Madagascar

    Science.gov (United States)

    Bemiasa, John; Remanevy, Sitraka

    2014-05-01

    During six week survey (August - October 2009) in Western and Northern coast of Madagascar, the R/V 'Dr. Fridtjof Nansen' has carried out a study of the pelagic ecosystem. In collaboration with Agulhas & Somali Current Large Marine Ecosystems project (ASCLME) and South West Indian Ocean Fisheries Project (SWIOFP), the aim of the survey was to establish the physical, chemical and biological characteristics of the Western Madagascar shelf region as a whole. Zooplankton samples were collected with Hydrobios Multinet at all environmental stations ranging from 200 m depth to the surface. The Multinet was equipped with 5 nets for depth-stratified sampling. The nets were fitted with 180 µm mesh size and the water flow through the nets was measured. The Multinet was deployed and retrieved at a rate of ~ 1.5 m per second and was obliquely hauled. The five nets were triggered at the pre-selected depth intervals 0-25m, 25-50m, 50-80m, 80-120m and 120-200m. All samples were stored in marked bottles and preserved with buffered formaldehyde of 4% for further analysis. As results,the zooplankton abundance was influenced by physico-chemical factors. During the study period 34 Family of zooplankton were identified which are dominated by Copepoda (58,69%) followed by Radiolaria (12,06%), Appendicularia (6,47%), Sagitta (5,11%), Larvae (4,57%), Ostracoda (3,13%), pelagic Foraminifera (2,15%). Family of zooplankton with abundance sampling sites. The findings of the present study will help to improve the scientific knowledge of the marine ecosystem of the west coast of Madagascar.

  7. O papel da citologia no diagnóstico das neoplasias músculo-esqueléticas: revisão sistemática The role of cytology in the diagnosis of musculoskeletal neoplasms: systematic review

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    Pablo Moura de Andrade Lima

    2012-01-01

    Full Text Available Os autores revisaram sistematicamente a literatura da última década sobre o papel ocupado pela citologia na avaliação das neoplasias músculo-esqueléticas e sua precisão diagnóstica. Foi realizada uma consulta nas bases de dados PubMed, MEDLINE, LILACS e SciELO, que utilizassem a citologia no diagnóstico das lesões músculo-esqueléticas . Foram utilizados limites para os idiomas inglês, espanhol e português. e artigos publicados a partir de 2000. Foram resgatados 757 artigos, dos quais 24 foram selecionados com a aplicação dos critérios de inclusão e exclusão. Concluiu-se que apesar de promissora na avaliação das lesões músculo-esqueléticas, a citologia obtida por punção por agulha fina é menos precisa e confiável do que a avaliação histológica na avaliação dessas lesões.The authors systematically reviewed the literature of the last decade on the role of cytology in theevaluation of musculoskeletal neoplasms, and its diagnostic accuracy. A search was carried out on the databases PubMed, MEDLINE, LILACS and SciELO, selecting articles in which cytology was used in the diagnosis of musculoskeletal neoplasms. Limits(Boolean operators? were used for English, Spanish and Portuguese, and only articles published since2000 were selected. 757 articles were retrieved, 24 of which were selected based on criteria of inclusion and exclusion. It was concluded that although promising in the assessment of musculoskeletal neoplasms, cytology obtained by fine needle aspiration is less accurate and reliable than histological evaluation of such lesions.

  8. Post break-up tectonic inversion across the southwestern cape of South Africa: New insights from apatite and zircon fission track thermochronometry

    Science.gov (United States)

    Wildman, Mark; Brown, Roderick; Watkins, Ron; Carter, Andrew; Gleadow, Andrew; Summerfield, Michael

    2015-07-01

    The south-west African margin is regarded as an example of a passive continental margin formed by continental rifting following a phase of lithospheric extension and thinning. Recent attention focused on this margin has included theoretical modelling studies of rift processes, plate kinematic studies of the opening geometry and timing, and empirical studies focused on documenting the crustal structure and offshore sedimentary record. Here, we examine the onshore geomorphic and tectonic response to rifting and breakup, with a specific focus on the SW Cape of South Africa. We present 75 new apatite and 8 new zircon fission track analyses from outcrop samples and onshore borehole profiles along the western margin of South Africa. The data are used to derive robust thermal histories that record two discrete phases of accelerated erosional cooling during the Early Cretaceous (150-130 Ma) and Late Cretaceous (100-80 Ma), respectively. Both periods of enhanced erosion are regional in extent, involved km-scale erosion, and extend well inland of the current escarpment zone, albeit with spatially variable intensity and style. The Late Cretaceous episode is also expressed more locally by tectonic reactivation and inversion of major faults causing km-scale differential displacement and erosion. The new AFT data do not exclude the possibility of modest surface uplift occurring during the Cenozoic, but they restrict the depth of regional Cenozoic erosion on the western margin to less than c. 1 km. The inferred pattern and chronology of erosion onshore is consistent with the key features and sediment accumulation patterns within the offshore Orange and Bredasdorp basins. It is suggested that the Late Cretaceous event was triggered by a combination of regional dynamic uplift augmented along the western margin and in the SW Cape by local tectonic forces arising from dextral displacement of the Falkland Plateau along the Falkland-Agulhas Fracture Zone.

  9. Estimation of eddy heat transport in the global ocean from Argo data

    Institute of Scientific and Technical Information of China (English)

    ZHANG Zhiwei; ZHONG Yisen; TIAN Jiwei; YANG Qingxuan; ZHAO Wei

    2014-01-01

    The Argo data are used to calculate eddy (turbulence) heat transport (EHT) in the global ocean and analyze its horizontal distribution and vertical structure. We calculate the EHT by averaging all the v′, T′ profiles within each 2◦× 2◦ bin. The velocity and temperature anomalies are obtained by removing their clima-tological values from the Argo“instantaneous”values respectively. Through the Student’s t-test and an error evaluation, we obtained a total of 87% Argo bins with significant depth-integrated EHTs (D-EHTs). The results reveal a positive-and-negative alternating D-EHT pattern along the western boundary currents (WBC) and Antarctic Circumpolar Current (ACC). The zonally-integrated D-EHT (ZI-EHT) of the global o-cean reaches 0.12 PW in the northern WBC band and-0.38 PW in the ACC band respectively. The strong ZI-EHT across the ACC in the global ocean is mainly caused by the southern Indian Ocean. The ZI-EHT in the above two bands accounts for a large portion of the total oceanic heat transport, which may play an important role in regulating the climate. The analysis of vertical structures of the EHT along the 35◦N and 45◦S section reveals that the oscillating EHT pattern can reach deep in the northern WBC regions and the Agulhas Return Current (ARC) region. It also shows that the strong EHT could reach 600 m in the WBC re-gions and 1 000 m in the ARC region, with the maximum mainly located between 100 and 400 m depth. The results would provide useful information for improving the parameterization scheme in models.

  10. Hemangioendotelioma epitelióide de pleura Epithelioid hemangioendothelioma of the pleura

    Directory of Open Access Journals (Sweden)

    Patrícia K. Vitório

    2004-02-01

    Full Text Available Relata-se o caso de um paciente exposto profissionalmente a asbesto por dez anos e portador de um tumor pleural muito raro, o hemangioendotelioma epitelióde. O paciente apresentava derrame pleural serohemorrágico, sem evidência de células neoplásicas e com predomínio de linfócitos. A biópsia pleural por agulha revelou processo inflamatório crônico inespecífico, com áreas de tecido mixóide. A videotoracoscopia mostrou nódulos difusos nas pleuras parietal e visceral. A biópsia revelou neoplasia mesenquimal e eram semelhantes às áreas focais observadas na primeira biópsia. O estudo imunohistoquímico demonstrou a presença dos marcadores vasculares CD31, CD34 e Fator VIII, caracterizando a origem vascular do tumor. O paciente foi tratado com cisplatina e ectoposide, tendo o óbito ocorrido três meses após o diagnóstico.Epithelioid hemangioendothelioma (EHE, a very uncommon pleural tumor, was diagnosed in a 61-year-old man with work-related exposure to asbestos. Serohemorrhagic pleural effusion was diagnosed in the work-up of this patient, whose complaints were chest pain and weight loss. A lymphocytic predominance was present in the effusion, but no malignant cells were seen; pleural needle biopsy disclosed only a non-specific inflammatory process. Video thoracoscopy revealed nodules in parietal and visceral pleurae. A biopsy revealed a mesenchymal neoplasm; vascular markers CD 31, CD 34 and VIII factor were present; therefore, diagnosis of HE was accepted. The tumor was not responsive to cisplatin or etoposide and the patient died 3 months after the diagnosis.

  11. Hiperreflexia autonômica em gestante tetraplégica: relato de caso

    Directory of Open Access Journals (Sweden)

    Simoni Ricardo Francisco

    2003-01-01

    Full Text Available JUSTIFICATIVA E OBJETIVOS: As complicações da gestante com lesão medular incluem infecções urinárias, calculose renal, anemia, úlceras de decúbito, espasmos musculares, sepsis, hiperatividade uterina e a hiperreflexia autonômica. Durante a anestesia a hiperreflexia autonômica é a complicação mais importante, que deve ser, antes de tudo, prevenida. Ela é freqüentemente desenvolvida em pacientes com transecção medular ao nível da quinta à sétima vértebra torácica, ou acima. Nosso relato tem com objetivo apresentar um caso de gestante tetraplégica, com lesão ao nível da sexta vértebra cervical, que se submeteu à operação cesariana sob anestesia peridural contínua com bupivacaína a 0,25% sem vasoconstritor, associada ao fentanil. RELATO DO CASO: Paciente tetraplégica, primigesta à termo, idade gestacional de 39 semanas, branca, 22 anos, 63 kg, 168 cm de altura, estado físico ASA II, internada para ser submetida a cesariana eletiva. Relatava trauma raquimedular ao nível de C6 há 3 anos. Após hidratação prévia com 1500 ml de solução fisiológica, procedeu-se à anestesia peridural com punção mediana no espaço L3-L4 com a paciente em decúbito lateral, agulha Tuohy descartável calibre 17G e sem botão anestésico prévio. Imediatamente após a introdução da agulha, observou-se contração da musculatura paravertebral adjacente, aumento da pressão arterial (PA = 158 x 72 mmHg e aumento da freqüência cardíaca (FC = 90 bpm. No entanto, a paciente não relatava dor. Retirou-se agulha e fez-se o botão anestésico, dando-se seqüência ao bloqueio peridural, com injeção de 20 ml de bupivacaína a 0,25% sem vasoconstritor associados a 100 µg de fentanil espinhal e passagem de cateter peridural em sentido cefálico (3 a 4 cm. A cirurgia transcorreu sem intercorrências, não havendo necessidade de complementação do bloqueio em nenhum momento. Houve dois episódios de hipotensão arterial nas primeiras

  12. Colheita de medula óssea em cães: modelo para obtenção da fração total de células mononucleares Bone marrow harvest in dogs: model for acquisition of the total fraction of mononuclears cells

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    Débora Cristina Olsson

    2009-02-01

    Full Text Available No presente trabalho foi elaborada uma técnica para protocolo de colheita de medula óssea (MO (10ml. kg-1, do osso femoral, para isolamento, quantificação e viabilidade da fração total de células mononucleares (CM. Para tanto, 40 cães machos ou fêmeas, sem raça definida, com idade aproximada de dois anos, pesando em torno de 10kg, foram submetidos a procedimento asséptico em ambiente cirúrgico para colheita de MO. Para a obtenção de uma quantidade suficiente de CM, durante o procedimento foi utilizada a agulha tipo Steis anatômica, que favoreceu a colheita de volume sangüíneo em menor espaço de tempo e não danificou a viabilidade celular. Também foi utilizado o Kit Bone Marrow collection, que teve a finalidade de filtrar as espículas ósseas, mantendo a integridade das CM colhidas durante o período decorrido para o acondiconamento do sangue. Durante o período da colheita de MO, os animais foram submetidos à collheita de sangue periférico (pré, trans e pós-operatório para avaliações hematológicas e sofreram autotransfusão sangüínea para suprir a queda acentuada de hemoglobina ocorrida nos primeiros momentos da coletaheita. O total de MO colhida e filtrada foi colocado lentamente sob gradiente de densidade Histopaque (1.077g ml-1. O material foi centrifugado a 440 x g por 30 minutos e o anel de células foi colhido, lavado e centrifugado três vezes em meio contendo solução salina 0,9%, DMEM e soro sangüíneo autólogo estéril. Foi realizada a contagem do anel celular em câmara de Neubauer e foi verificada sua viabilidade utilizando corante vital. Neste estudo foi verificado que no volume de MO colhido foi possível obter a média de 2,57 x 10(6 (± 1,56 CM kg-1 e a viabilidade celular foi superior a 90% (96,72 ± 2,9%. Conclui-se que a técnica de colheita de MO com agulha Steis com lavagem celular no meio contendo soro autólogo e Kit Bone Marrow e agulha Steis com lavagem celular no meio contendo soro aut

  13. Bloqueios nervosos guiados por ultra-som Bloqueos nerviosos guiados por ultrasonido Ultrasound-guided nerve blocks

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    Pablo Escovedo Helayel

    2007-02-01

    Full Text Available JUSTIFICATIVA E OBJETIVOS: As técnicas de bloqueios nervosos guiados por ultra-som são baseadas na visualização direta das estruturas nervosas, da agulha de bloqueio e das estruturas anatômicas adjacentes. Desta maneira, é possível depositar a solução de anestésico local precisamente em torno dos nervos e acompanhar a sua dispersão em tempo real, obtendo-se, assim, um bloqueio mais eficaz, de menor latência, menor dependência de referências anatômicas, menor volume de solução anestésica e maior segurança. CONTEÚDO: O artigo revisa os aspectos relativos aos mecanismos físicos para formação de imagens, a anatomia ultra-sonográfica do neuroeixo e dos plexos braquial e lombossacral, os equipamentos e materiais empregados nos bloqueios, os ajustes do aparelho de ultra-som para melhorar as imagens, os planos de visualização das agulhas de bloqueio e as técnicas e o treinamento em bloqueios guiados por ultra-som. CONCLUSÕES: Os passos para se obter sucesso em anestesia regional incluem a identificação exata da posição dos nervos, a localização precisa da agulha, sem lesões nas estruturas adjacentes e, finalmente, a injeção cuidadosa de anestésico local junto aos nervos. Embora a neuroestimulação forneça grande auxílio na identificação dos nervos, esta não consegue, isoladamente, preencher todas essas exigências. Por isso, acredita-se que os bloqueios guiados por ultra-som serão a técnica de eleição para anestesia regional num futuro não muito distante.JUSTIFICATIVA Y OBJETIVOS: Las técnicas de bloqueos nerviosos guiados por ultrasonido se basan en la visualización directa de las estructuras nerviosas, de la aguja de bloqueo y de las estructuras anatómicas adyacentes. De esa manera, se puede depositar la solución de anestésico local precisamente en torno de los nervios y acompañar su dispersión en tiempo real, obteniéndose así, un bloqueo más eficaz, de menor latencia, menor dependencia de

  14. Transjugular liver core biopsy: indications, results, and complications; Transjugulaere Leberstanzbiopsie: Indikationen, Ergebnisse, Komplikationen

    Energy Technology Data Exchange (ETDEWEB)

    Dinkel, H.P.; Wittchen, K.; Hoppe, H.; Triller, J. [Inst. fuer Diagnostische Radiologie, Inselspital, Univ. Bern (Switzerland); Dufour, J.F. [Inst. fuer Klinische Pharmakologie, Inselspital, Univ. Bern (Switzerland); Zimmermann, A. [Inst. fuer Pathologie, Inselspital, Univ. Bern (Switzerland)

    2003-08-01

    Purpose: To evaluate benefit, feasibility, and frequency of complications with transjugular liver biopsy using a semi-automatic Tru-cut system. Materials and Methods: Eighty-five consecutive patients (57 males, 28 females) with various liver disorders (cirrhosis [30], hepatitis [12], acute hepatopathy [34], orthotopic liver transplantation [8], hepatocellular carcinoma [1]), coagulopathies (n=71) and/or ascites (n = 46) were referred to our department for a transjugular liver biopsy. Mean age was 48 {+-} 16 years (range 17 to 75 years). Success and complications were retrospectively evaluated from the radiology reports, pathology reports, and patient files. Success was defined as procuring a tissue specimen that enabled a definite histological diagnosis. The complications included thrombosis at the puncture site, hematoma, cardiac arrhythmia, capsular perforation, hemorrhage, and cardiac damage. Mortality included all deaths within 30 days after the procedure. Procedure-related mortality included all deaths related to the procedure. Results: The procedure was technically successful in 80 patients (94%) and unsuccessful in 5 patients (6%) due to a failed hepatic vein cannulation (1 patient with Budd Chiari syndrome and total liver vein occlusion, 4 patients with unsuitable anatomy). One biopsy pass was made in 22 patients, and two passes were made in 45 and three or more passes in 14 patients, all in a single session. The sample quality was judged by the pathologist as good in 71 of 80 patients (89%) and poor in 8 patients (10%). A diagnosis was not possible in 1 patient. Eight procedure-related complications occurred, which were classified according to the criteria of the society of interventional radiology (SIR) as minor in 5 (3 type A, 2 type B) and major in 3 (1 pneumothorax, type C, 1 nonfatal bleeding, type D, and 1 fatal bleeding, type F). Procedure-related mortality was 1%, overall mortality 15% (mostly due to progressive liver failure). (orig.) [German

  15. Role of p-glycoprotein expression in predicting response to neoadjuvant chemotherapy in breast cancer-a prospective clinical study

    Directory of Open Access Journals (Sweden)

    Bhatia Ashima

    2005-09-01

    Full Text Available Abstract Background Neoadjuvant chemotherapy (NACT is an integral part of multi-modality approach in the management of locally advanced breast cancer. It is vital to predict response to chemotherapy in order to tailor the regime for a particular patient. The prediction would help in avoiding the toxicity induced by an ineffective chemotherapeutic regime in a non-responder and would also help in the planning of an alternate regime. Development of resistance to chemotherapeutic agents is a major problem and one of the mechanisms considered responsible is the expression of 170-k Da membrane glycoprotein (usually referred to as p-170 or p-glycoprotein, which is encoded by multidrug resistance (MDR1 gene. This glycoprotein acts as an energy dependent pump, which actively extrudes certain families of chemotherapeutic agents from the cells. The expression of p-glycoprotein at initial presentation has been found to be associated with refractoriness to chemotherapy and a poor outcome. Against this background a prospective study was conducted using C219 mouse monoclonal antibody specific for p-glycoprotein to ascertain whether pretreatment detection of p-glycoprotein expression could be utilized as a reliable predictor of response to neoadjuvant chemotherapy in patients with breast cancer. Patients and methods Fifty cases of locally advanced breast cancer were subjected to trucut® biopsy and the tissue samples were evaluated immunohistochemically for p-glycoprotein expression and ER, PR status. The response to neoadjuvant chemotherapy was assessed clinically and by using ultrasound after three cycles of FAC regime (cyclophosphamide 600 mg/m2, Adriamycin 50 mg/m2, 5-fluorourail 600 mg/m2 at an interval of three weeks. The clinical response was correlated with both the pre and post chemotherapy p-glycoprotein expression. Descriptive studies were performed with SPSS version 10. The significance of correlation between tumor response and p

  16. Role of axillary lymph node ultra-sound and large core biopsy in the preoperative assessment of patients selected for sentinel node biopsy; Ruolo dell'ecografia e della microbiopsia istologica nella valutazione del cavo ascellare in pazienti candidate a biopsia del linfonodo sentinella

    Energy Technology Data Exchange (ETDEWEB)

    Nori, Jacopo; Boeri, Cecilia; Vanzi, Ermanno; Nori Bufalini, Filippo; Masi, Andrea [Azienda Ospedaliero-Universitaria Careggi, Firenze (Italy). Diagnostica senologica; Bazzocchi, Massimo; Londero, Viviana [Udine Univ., Udine (Italy). Istituto di radiologia universitaria; Mangialavori, Giuseppe [Ospedale di Merano, Bolzano (Italy). Servizio di radiologia; Distante, Vito; Simoncini, Roberta [Firenze Univ., Firenze (Italy). Clinica chirurgica I

    2005-04-01

    Purpose: To aim of this study was to evaluate the diagnostic accuracy of axillary lymph node sonography, if necessary in collaboration with US-guided large core biopsy, in the preoperative evaluation of breast cancer patients scheduled for quadrantectomy and sentinel lymph node excision. Materials and methods: From July 2001 to December 2002, we evaluated 117 breast cancer patients with ultrasound and, where indicated, FNAB. Breast lesions has diameters between 4 and 26 mm (mean diameter 11 mm). Fifteen (13%) of the 117 patients were excluded from the series as they did not found fulfil the criteria for preliminary sonography of the axilla: in 9 patients fewer than 4 nodes were detected and in 6 patients the breast lesions were intraoperatively found to be benign. Eleven patients (10.7%) with sonographically suspicious axillary nodes were sampled by US-guided core biopsy using a 14 or 16 Gauge Tru-Cut needle. Results: The ultrasound study aims to evaluate the dimensions and morphology of the breast lesion as well as detect and assess at least 4 axillary nodes. These were evaluated for hilar and cortical thickening and radio between the sinus diameter and the total longitudinal diameter. Lymph nodes with hilar diameters equal to or greater than 50% of the longitudinal diameter were considered normal. Of the 102 patients evaluated, 77 (75.7%) had normal axillary nodes according to the US criteria adopted. Negativity was confirmed by histology in 56 cases (72.7%, true negative); 21 (27.3%, false negative) were found to be positive, in contrast with the sonographic appearance. The false negative cases were due to lymph node micrometastasis which probably did not cause morphologic alterations perceptible at ultrasound. The remaining 25 patients (24.5%) had axillary lymph nodes classified as suspicious. In 13 cases of (52%, true positive) there was agreement with histology, whereas in 12 cases (48%, false positive) the US suspicion was not confirmed at surgery. The most

  17. Influência do preparo do orifício piloto na ancoragem dos parafusos pediculares Effect of the pilot hole preparation on the anchorage of pedicle screws

    Directory of Open Access Journals (Sweden)

    Gustavo Silva Abrahão

    2012-01-01

    Full Text Available OBJETIVO: Avaliamos a influência do diâmetro e do modo de preparação do orifício piloto na resistência ao arrancamento e no torque de inserção dos parafusos pediculares com diâmetro interno cônico. MÉTODOS: Ensaios mecânicos foram realizados com parafusos pediculares com alma cônica e diâmetro de 4,2mm e 5,2mm inseridos nos pedículos vertebrais lombares de suínos. O orifício piloto foi confeccionado com de broca e sondas (pontiaguda e cortante com diferentes diâmetros. RESULTADOS: Testando o parafuso de 4,2mm a perfuração com orifício igual ou inferior ao menor diâmetro interno do parafuso, aumentou o torque e a resistência ao arrancamento. Perfurações com diferentes instrumentos apresentaram comportamento semelhante. Perfurações com sondas permitiram que orifícios confeccionados com dimensões superiores ao menor diâmetro interno do parafuso apresentassem resistência semelhante a das perfurações com dimensões iguais ao menor diâmetro interno do implante, realizadas com sondas e brocas. CONCLUSÕES: Nos de 4,2 mm o diâmetro e o modo de preparação do orifício influenciam o torque e a resistência, nos de 5,2 mm apenas o torque de inserção. Não há correlação entre força de arrancamento e torque de inserção. Nível de evidência II, Estudos terapêuticos - Investigação dos Resultados do Tratamento.OBJECTIVE: We evaluated the influence of the diameter and the preparation of the pilot hole on the resistance to the pulling out and the strength when inserting pedicle screws with conical internal diameter. METHODS: Mechanical experiments were performed with pedicle conical screws of 4.2 mm and 5.2 mm diameter. They were inserted in the vertebral pedicles of swine. The hole was manufactured with a drill and probes with different diameters. RESULTS: While testing the 4.2 mm screw, the perforation of holes with measure equal or inferior to the lesser internal diameter of the screw increased the torque and

  18. Decrease of noxious emissions in the residual fuel oil combustion; Disminucion de emisiones nocivas en la combustion de aceite combustible residual

    Energy Technology Data Exchange (ETDEWEB)

    Mandoki W, Jorge [Econergia S. de R. L. de C. V. Mexico, D. F. (Mexico)

    1994-12-31

    achieved. [Espanol] La combustion de aceite combustible residual emite sustancias nocivas como particulas carbonaceas, oxidos de nitrogeno y trioxido de azufre, a niveles inadmisibles. Agua emulsionada en el combustible reduce sustancialmente dichas emisiones, lograndose ademas, en la mayoria de los casos, un ahorro neto en el consumo de combustible. Se muestran los efectos beneficos de quemar el aceite combustible residual en forma de emulsion, asi como el metodo para producir una emulsion adecuada. La tecnologia del combustible emulsionado ofrece una opcion de bajo costo para reducir la contaminacion atmosferica. La calidad del aceite combustible residual ha estado declinando durante las ultimas decadas debido: 1. Al aumento en la produccion de petroleos crudos pesados generalmente con mayor contenido de asfaltenos y de azufre. 2. A menor disponibilidad de residuos de la destilacion al vacio debido a su conversion a productos de mayor valor. 3. A procesos de conversion mas intensivos, como cracking catalitico, {sup v}isbreaking{sup ,} etc., que aumentan la concentracion de asfaltenos en los fondos, ocasionando problemas de inestabilidad. 4. Al aumento en el contenido de vanadio y de otros metales a medida que aumenta la concentracion de asfaltenos. El uso de aceite combustible emulsionado proporciona un medio eficaz y economico para reducir sustancialmente las emisiones nocivas a la atmosfera. La emulsion contiene particulas de agua de un diametro entre 2 y 20 micras, dispersadas uniformemente dentro del aceite combustible, en una proporcion generalmente enter 5 y 10%; ademas contiene un agente tensioactivo para asegurar una emulsion estable, capaz de resistir los esfuerzos cortantes del sistema de bombeo y distribucion. Cuando las gotas de aceite combustible atomizado llegan a la camara de combustion, el agua esmulsionada en ellas se convierte instantaneamente en vapor de alta presion, ocasionando una violenta atomizacion secundaria. El efecto de esta atomizacion

  19. Estudo sobre os acidentes de trabalho com exposição aos líquidos corporais humanos em trabalhadores da saúde de um hospital universitário Estudio sobre los accidentes de trabajo con exposicíon a líquidos corporales humanos en trabajadores de la salud de un hospital universitario Study of work accidents related to human body fluids exposure among health workers at a university hospital

    Directory of Open Access Journals (Sweden)

    Ana Cristina Balsamo

    2006-06-01

    Full Text Available Este estudo descritivo exploratório, de abordagem quantitativa, teve como objetivos caracterizar os trabalhadores do Hospital Universitário da Universidade de São Paulo que sofreram acidente de trabalho com exposição aos líquidos corporais humanos, e avaliar o protocolo de atendimento aos acidentados. A população consistiu de 48 trabalhadores que sofreram acidente, no período de julho de 2000 a junho de 2001. Para a coleta dos dados, foi elaborado um formulário e realizada entrevista. Os resultados mostraram que os trabalhadores do Departamento de Enfermagem foram os que apresentaram maior risco desses acidentes e 87,50% ocorreram com os materiais perfurocortantes. Quanto à situação/atividade, relacionada ao acidente, os trabalhadores informaram que 25% foram devido ao "ato inadequado durante a realização do procedimento" 19,64% dos trabalhadores referiram que o acidente simplesmente "aconteceu" e 29,17% responderam que não tinham sugestões. Este estudo forneceu ferramentas importantes para a revisão e elaboração de estratégias de prevenção dos acidentes com exposição aos líquidos corporais humanos.Este estudio tuvo como objetivos caracterizar a los trabajadores que sufrieron accidente de trabajo con exposición a líquidos corporales humanos y evaluar el procedimiento de atención a los accidentados. La población estudiada fue de 48 trabajadores que sufrieron accidentes, en el período de julio de 2000 hasta junio de 2001. Para la recogida de datos fue elaborado un formulario y realizada una entrevista. Los resultados mostraron que los trabajadores del Departamento de Enfermería fueron los que presentaron mayor riesgo con relación a estos accidentes y que el 87,50% ocurrió con materiales punzantes o cortantes. Respecto a la situación/actividad relacionada con el accidente, los trabajadores informaron que el 25% fue debido a "acción inadecuada durante la realización del procedimiento", el 19,64% de los

  20. Metodología para el Escalamiento de Agitadores Mecánicos Utilizados en Procesos con Fluidos No-Newtonianos

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    Oliveros T. Carlos E.

    1997-06-01

    Full Text Available Se determinó experimentalmente la tasa promedia de cortante (TCP generada por dos rotores utilizados para el desmucilaginado mecánico del café en Colombia: El CENICAFE III y El COLMECANO. Los valores experimentales de TCP fueron comparados con datos estimados con un modelo teórico obtenido asumiendo que el campo de flujo generado por el rotor se asemeja al flujo tipo Couette (TCP y un modelo propuesto por Oliveros (1993,1995. Se utilizó la prueba de X^2 (con 5% de significancia para comparar los valores experimentales y teóricos y se observó que hay diferencias entre ellos. A partir del modelo TCP se obtuvo una expresión semiteórica para estimar la TCP generada por el rotor COLMECANO con alta con fiabilidad (r^2 = 0.982. A una misma velocidad de rotación el agitador COLMECANO genera mayores valores de TCP que el rotor CENICAFE 1/1. luego debe generar mayores tasas de desmucilaginado. La potencia requerida para agitar suspensiones de café en baba-mucílago+agua adicionada (1 L/kg de cps. en el rango de 300 a l. 200 rpm, utilizando los rotores CENICAFE III y COLMECANO, fué medida experimentalmente y estimada teóricamente con dos modelos: el modelo propuesto por Oliveros (1993.1995 Y un modelo obtenido asumiendo que el campo de flujo generado por los rotores es del tipo Couette (modelo pc. Los valores experimentales y estimados fueron comparados por medio de la prueba de X^2 (al 5% de significancia observándose diferencias entre ellos. Mediante un análisis de regresión lineal simple aplicado a los valores obtenidos con el modelo pe se obtuvo una expresión semi-teórica la cual permite estimar con alta confiabilidad la potencia para agitar las suspensiones de café en baba-mucílago+agua (r^2 = 0,982 con el rotor COLMECANO. A una misma velocidad de rotación, el rotor COLMECANO requiere menos potencia que el CENICAFE III para agitar suspensiones de café en baba-mucílago+agua (1 litro de agua/kg de cps. Se utilizó el concepto

  1. Accidentes ocupacionales y conocimiento sobre precauciones universales en internos universitarios costarricenses

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    Álvaro Rivera-Valdivia

    2005-04-01

    Full Text Available Justificación y objetivo: los internos universitarios (estudiantes de medicina en su último año son vulnerables a accidentes ocupacionales con agujas y otros objetos cortantes, especialmente debido a su inexperiencia y falta de entrenamiento aunados a su deseo de realizar una serie de nuevas actividades y procedimientos. No existe información en nuestro país con respecto a la frecuencia de este tipo de accidentes en internos universitarios de la carrera de medicina. El objetivo del presente estudio fue estudiar la frecuencia y tipo de accidentes ocupacionales sufridos con mayor frecuencia por internos de medicina y evaluar su conocimiento sobre precauciones universales. Metodología: Se realizó un estudio descriptivo de corte transversal a través de una encuesta directa y anónima. De todos los internos de medicina que trabajaban en el Valle Central de octubre de 2001 a enero de 2002 se seleccionó una muestra aleatoria de 201 internos (poder 95%, error 5%. A la población seleccionada se le aplicó una encuesta precodificada, la cual consistía en 20 preguntas estructuradas, la mayoría cerradas y tres abiertas relacionadas con la ocurrencia de accidentes ocupacionales en los médicos internos, número, tipo, acciones tomadas tras el accidente y conocimientos sobre precauciones universales. Posteriormente se hizo un análisis descriptivo de los resultados obtenidos. Resultados: de todos los participantes, 90% habían trabajado más de 3 meses como médicos internos. Más de la mitad habían realizado al menos 3 meses de rotación en una área médica y 3 meses en una área quirúrgica. La muestra incluyó estudiantes de 5 universidades diferentes. Sólo un 37% de los internos encuestados habían recibido la vacunación contra virus de la hepatitis B. Del total de internos, 64% admitió haber sufrido al menos un accidente ocupacional con sangre de algún paciente, un 20% admitió haber sufrido 3 o 4 accidentes. De los internos que

  2. Waste management in non-hospital emergency units Manejo de residuos en las unidades no hospitalarias de urgencia y emergencia Gerenciamento de resíduos em unidades não hospitalares de urgência e emergência

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    Milca Severino Pereira

    2013-02-01

    Full Text Available OBJECTIVE: to analyze waste management in urgency and emergency non-hospital health care service units. METHOD: Epidemiological cross-sectional study undertaken at three Non-Hospital Emergency Units. The data were collected using systematic observation, registered daily in a spreadsheet and checklist, and analyzed through descriptive statistics. RESULTS: the generation of waste varied from 0.087 to 0.138 kg per patient per day. Waste management showed inadequacies in all stages, especially in the separation stage. Infectious waste was found together with common waste, preventing recycling, and piercing and cutting objects were mixed with waste from different groups, increasing the risk of occupational accidents. CONCLUSION: the study reveals the lack of an institutional waste management policy, as demonstrated by the failure of operational stages, involving problems related to management, physical structure, material and human resources at the units. This is relevant for health care units, considering the quality of patient care and its interface with sustainability.OBJETIVO: analizar la gestión de los residuos en unidades hospitalarias de emergencias y urgencias. MÉTODO: estudio epidemiológico. Los datos fueron recolectados por observación sistemática, registrados diariamente en una hoja de cálculo y check list y analizados mediante estadística descriptiva. RESULTADOS: la generación de residuos varió desde 0,087 hasta 0,138 kg / usuario / día. La gestión de los residuos mostró deficiencias en todas las etapas, especialmente en la segregación. Fueron encontrados residuos infecciosos añadidos a los comunes, invalidando el reciclaje, así como materiales punzantes y cortantes mezclados con los diferentes grupos, amentando el riesgo de accidentes de trabajo. CONCLUSIÓN: el estudio revela la ausencia de una política institucional para la gestión de los residuos, como lo demuestran las fallas en las medidas operacionales, que

  3. Estudio del comportamiento del hormigón armado ante esfuerzos normales y tangentes mediante modelos seccionales de interacción completa

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    Bairán, J. M.

    2010-06-01

    con simplificaciones más o menos acertadas. Su aplicación resulta satisfactoria en casos dominados por solicitaciones normales. Existen varios intentos de extenderlos directamente al análisis no lineal de estructuras de hormigón con cargas arbitrarias donde dichas teorías no son aplicables estrictamente debido, entre otras cosas, a la fisuración diagonal. Así pues, la respuesta real ante solicitaciones importantes del tipo cortante, torsión o confinamiento, no puede ser reproducida adecuadamente por los métodos tradicionales. En este artículo se analizan las ventajas del análisis seccional y se define hasta qué punto considerar sólo el efecto de los esfuerzos normales puede resultar suficiente. Se presenta brevemente un modelo que permite reproducir estados tensionales tridimensionales a nivel seccional y se emplea para analizar estructuras sometidas a casos con notable influencia de esfuerzos tangenciales y confinamiento y se investiga la incidencia práctica en la respuesta de secciones y estructuras continuas. Se resalta la existencia de una distribución de tensiones normales modificada en la zona de tracciones que puede afectar la rigidez real de la estructura. Asimismo, se manifiesta un efecto dual al incremento de tracciones en la armadura longitudinal consistente en un incremento de tracciones en la armadura transversal con momento concomitante. Por otro lado, el modelo permite una representación más real de la fisuración en vigas y evidencia una mayor capacidad de rotación plástica antes de la rotura.

  4. Caçambas coletoras de resíduos da construção e demolição no contexto do mobiliário urbano: uma questão de saúde pública e ambiental Containers for construction and demolition waste as urban furnishing: an environmental and public health issue

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    Joyce Maria de Araujo

    2007-04-01

    Full Text Available A utilização de caçambas metálicas em áreas públicas para acondicionar resíduos da construção e demolição-RCD tem sido incrementada, em cidades brasileiras, a partir da década de 1990, contribuindo para o adensamento do mobiliário urbano e modificando a paisagem urbana. Este equipamento é utilizado para confinar os resíduos de modo a impedir sua dispersão no ambiente, facilitar sua coleta e transporte e evitar a exposição de moradores e transeuntes. A despeito dessas vantagens, as caçambas representam um perigo ao ambiente e à saúde pública. Com objetivo de verificar a interferência das caçambas nas ruas e calçadas e identificar situações de risco, foi realizado um estudo de campo envolvendo 58 caçambas estacionadas em 5 diferentes bairros da cidade de São Paulo. Aspectos como localização e disposição, identificação e uso de pintura reflexiva para prevenção de acidentes com veículos automotivos e conteúdo da caçamba foram observados. Os resultados indicaram a presença de não-conformidades, na maioria dos casos observados, como: localização inadequada, pintura reflexiva não existente ou apagada, quantidade excessiva de resíduos, presença de matéria orgânica ou resíduos perigosos, objetos cortantes ou pontiagudos extrapolando os limites da caçamba, dentre outros. Conclui-se que é necessário desenvolver uma abordagem integrada e ecossistêmica para estes elementos do mobiliário urbano, de modo a contemplar, além da questão de gerenciamento dos RCD, aspectos de saúde pública e ambiental e, ao mesmo tempo, preservar os valores estéticos e a paisagem urbana. Dessa forma, o emprego de caçambas coletoras de RCD pode trazer benefícios que contribuam para a qualidade de vida nas cidades brasileiras.The use of metallic waste containers in public areas for storage of construction and demolition wastes-C&D debris was introduced in Brazilian cities in the 1990's, becoming a piece of urban

  5. Reinforced Concrete Buildings Following NSR-10 vs Quetame Earthquake Registered on Bogotá D.C. Edificios de concreto reforzado siguiendo la NSR-10 vs sismo de Quetame registrado en Bogotá D.C.

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    D M Ruiz

    2012-12-01

    calcularonlas rótulas plásticas para cada elemento estructural de los 6 edificios, y en elcaso de las columnas, también sus diagramas de interacción. Luego, las edificacion estridimensionales fueron sometidas simultáneamente a los registros contra el tiempo norte-sur, este-oeste y vertical. Para cada edificio sometidoa las señales de cada estación, se obtuvieron las demandas de deriva, los desplazamientosde la cubierta, el cortante en la base y los niveles de daño segúnestimadores internacionalmente aceptados. Finalmente, se generaron mapasde demandas de deriva y aceleración por edificio en la ciudad de Bogotá D.C.Los resultados sugieren que los edificios diseñados con la amenaza sísmica dela nueva microzonificación de Bogotá y con las estipulaciones de la NSR-10,presentarán daños excesivos asociados a estados límites como son los de «seguridadde vidas» para un sismo de baja magnitud como fue el de Quetame,que equivalió a solo una fracción de aquel que corresponde al comportamientoreal bajo el escenario de diseño.

  6. Modelación numérica de la hidrodinámica, del oxígeno disuelto y la demanda bioquímica de oxígeno en sistemas con vegetación Numerical modeling of hydrodynamics, dissolved oxygen and biochemical oxygen demand in systems with vegetation

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    Ricardo González-López

    2011-08-01

    Full Text Available El presente trabajo trata sobre la implementación de un modelo numérico para simular la hidrodinámica y el transporte de contaminantes en sistemas donde existe vegetación, tanto sumergida como emergente. Dicho modelo se basa en las ecuaciones de aguas someras para el cálculo de las velocidades del flujo, haciendo énfasis en la evaluación del esfuerzo cortante de arrastre de las plantas y en la turbulencia; así como en la ecuación de advección-difusión-reacción para la simulación del transporte de sustancias disueltas. En este trabajo se presenta el cálculo del transporte de la Demanda Bioquímica de Oxígeno y del Oxígeno Disuelto. El objetivo principal es reproducir las funciones de filtrado de contaminación y reaereación que cumplen las plantas en cuerpos de agua, como los humedales. En los resultados obtenidos del campo de velocidades se aprecia el cambio de comportamiento por la restricción al flujo que impone la vegetación. Las concentraciones de DBO y OD varían debido al tiempo de residencia y a la reaereación producida por el intercambio atmosférico y la respiración de las plantas. Se concluye que el modelo representa de manera óptima el comportamiento del transporte de sustancias disueltas en flujos con presencia de vegetación y que se puede aplicar a la gran variedad de ecosistemas, siendo capaz de predecir la ruta y destino de la contaminación.This work deals with the implementation of a numerical model to simulate hydrodynamics and transport of pollutants in flows where submerged vegetation is present. The model is based on the Shallow-Water Equations to calculate the mean velocities, emphasizing calculations of the shear stress produced by both the vegetation and turbulence. The Advection-Diffusion-Reaction Equation is used to calculate the transport of the Biochemical Oxygen Demand and the Dissolved Oxygen. The main objective is to simulate the transport of these substances and the pollution filtering and

  7. A importância da interação entre odontopediatrias e pediatrias no manejo de dentes natais e neonatais The importance of interaction of pediatric dentists and pediatricians in the management of natal and neonatal teeth

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    Michele Baffi Diniz

    2008-03-01

    Full Text Available OBJETIVO: Apresentar revisão de literatura sobre dentes natais e neonatais, abordando características clínicas, fatores etiológicos, medidas terapêuticas e a importância do conhecimento desta anomalia, por odontopediatras e pediatras. FONTES DE DADOS: Foram selecionados os artigos mais relevantes sobre o tema, desde 1950 até 2006, pesquisados no Medline e na Bibliografia Brasileira em Odontologia (BBO, além de livros de pertinentes. SÍNTESE DOS DADOS: Os dentes natais e neonatais consistem em uma anomalia de erupção, sendo caracterizados por seu irrompimento na cavidade oral durante o período intra-uterino ou no primeiro mês de vida respectivamente, podendo fazer parte da dentição decídua normal ou supranumerária. Esses dentes, em geral, apresentam bordos cortantes e podem estar relacionados ao aparecimento de ulcerações na base da língua do bebê e/ou no seio materno, comprometendo a amamentação. A fraca implantação óssea desses dentes favorece sua grande mobilidade, tornando-se, assim, um fator de risco à sua aspiração ou deglutição pela criança. A abordagem terapêutica depende da dentição à qual pertence o dente e dos possíveis problemas que este pode causar à saúde da criança ou da mãe. CONCLUSÕES: O conhecimento sobre as características clínicas e os possíveis distúrbios aos quais os dentes natais e neonatais estão relacionados por odontopediatras e pediatras possibilita a interação necessária para o diagnóstico precoce e a abordagem integral da criança.OBJECTIVE: To review available data about natal and neonatal teeth, emphasizing clinical characteristics, etiological factors, treatment, and the importance of the knowledge about this anomaly by pediatric dentists and pediatricians. DATA SOURCES: The most relevant articles published on the subject were selected, from 1950 to 2006, browsed on Medline, Brazilian Bibliografy of Odontology (BBO and Dentistry books. DATA SYNTHESIS: Natal and

  8. Mandible characteristics and allometric relations in copepods: a reliable method to estimate prey size and composition from mandible occurrence in predator guts Caracterización de mandíbulas y relación alométrica en copépodos: método adecuado para estimar tamaño y composición de presas usando mandíbulas encontradas en intestinos de depredadores

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    Ricardo Giesecke

    2004-12-01

    Full Text Available The size and shape of the cutting edge of the mandibles from the five most abundant copepod species found in Mejillones Bay are described with the aim to create a helpful tool for the identification of copepod prey and their size from predator gut contents. Good allometric relationships were found between the carapace length and the mandible width for the species Paracalanus parvus, Centropages brachiatus and Acartia tonsa. By contrast, the cyclopoids Oithona sp. and Corycaeus sp. did not present a good relationship between these two parameters, presumably due to the presence of more than a species in the study area. Applying the edge index (Itoh 1970 the copepods were classified as herbivores (e.g., P. parvus, omnivores (e.g., C. brachiatus and A. tonsa, and carnivores (e.g., Oithona sp.. In general, there was a tight relationship between the morphometric characters of the mandible blade and the trophic ecology of each species. The good relationship between the mandible width and the carapace length of the calanoid species will permit the estimation of the size of an ingested copepod by a predator, within a certain degree of accuracy, by measuring the width of the mandibles found in gut contents. This relationship and the supplementary characterization of the mandible blade will help improve the knowledge of the feeding ecology of the mesozooplankton in northern ChileEl tamaño y forma del extremo cortante de la mandíbula de las cinco especies de copépodos más abundantes en la bahía de Mejillones fueron descritas con el propósito de crear una herramienta útil para la identificación de contenidos intestinales de depredadores de copépodos. Aparte de esto, se analizó la relación alométrica entre la longitud cefalotoráxica y el diámetro mandibular para las especies Paracalanus parvus, Centropages brachiatus Acartia tonsa, Oithona sp. y Corycaeus sp. A diferencia de las especies calanoídeas, las especies ciclopoídeas no presentaron

  9. Riesgos de trabajo en veterinarios del centro-oeste de la provincia de Santa Fe, Argentina Occupational risks in veterinarans from the central-west area of Santa Fe province, Argentina

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    H.D Tarabla

    2009-06-01

    Full Text Available Se estimaron las frecuencias de accidentes ocupacionales y zoonosis, incapacidad laboral y uso de elementos de protección mediante encuestas telefónicas con cuestionario estructurado en 94 Veterinarios del centro-oeste santafesino. El 75,5% sufrió accidentes laborales en el año previo, y sólo el 7,4% no había tenido al menos uno a lo largo de su trayectoria profesional. Las lesiones más frecuentes fueron punzaduras, contusiones, hematomas, escoriaciones y heridas cortantes causadas por animales, agujas y tránsito vehicular. El 39,4% tuvo accidentes in itinere, la mayoría por tránsito vehicular. El 55,3% requirió atención médica y un tercio sufrió pérdidas de días de trabajo, con un promedio de 25,2±29,6 días por profesional accidentado. En los 12 meses previos a la encuesta se produjeron dos casos de brucelosis (2,9%, mientras que el 28,7% manifestó padecer o haber padecido alguna zoonosis en algún momento de su trayectoria profesional, siendo la brucelosis la más frecuente. El uso de elementos de protección fue claramente insuficiente. Aunque el 53,2% padecía alguna patología atribuible al ejercicio profesional, el 74,5 % manifestó no haber recibido capacitación alguna sobre peligros ocupacionales. La necesidad de capacitación específica en este área aparece como primordial para minimizar los riesgos.The frequency of occupational accidents, zoonosis, lost of work days, and protective practices were estimated by means of telephone interviews using a structured questionnaire on 94 Veterinarians from Central-West Santa Fe Province. Seventy six percent suffered occupational accidents on the previous year, while only 7,4% did not have a single accident throughout their careers. Most frequent lesions were punctures, concussions, haematomas, abrasions, and cutting injuries caused by animals, needles and traffic. Thirty nine percent suffered accidents in itinere, mostly due to traffic. Fifty five percent required medical

  10. Accidents with biological material and immunization against hepatitis B among students from the health area Accidente con material biológico y la vacunación contra la hepatitis B en estudiantes del área de la salud Acidente com material biológico e vacinação contra hepatite B entre graduandos da área da saúde

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    Elucir Gir

    2008-06-01

    Full Text Available Undergraduate students from the health area often handle piercing-cutting instruments in their academic activities, which exposes them to the risk of contracting infections. This study aimed to analyze accidents with biological material among these students. Out of 170 accidents registered, 83 (48.8% occurred with Dentistry students, 69 (40.6% with Medical students, 11 (6.5% with Nursing students and in 06 (3.5% of the cases there was no such information in the files. Most accidents, 106 (62.4%, occurred with students from private schools and 55 (32.3% with those from public schools. Percutaneous accidents occurred in 133 (78.2% exposures and there was immediate search for specialized health care in only 38 (21.3% accidents. In 127 (74.7% accidents, the immunization schedule against hepatitis B was complete. Therefore, schools need to offer courses and specific class subjects regarding biosafety measures, including aspects related to immunization, especially the vaccine against hepatitis B.La manipulación de instrumentos punzo cortantes por estudiantes del área de la salud es frecuente en la actividad académica, lo que los expone al riesgo de adquirir infecciones. Este estudio tuvo como objetivo analizar los accidentes con material biológico ocurridos en alumnos del área de la salud. De los 170 accidentes registrados, 83 (48,8% ocurrieron con alumnos del curso de Odontología, 69 (40,6% de Medicina, 11 (6,5% de Enfermería y en 06 (3,5% no había información en la ficha de atención. La mayoría, 106 (62,4%, ocurrió con alumnos de escuelas privadas y 55 (32,3% de públicas. Los accidentes percutáneos ocurrieron en 133 (78,2% exposiciones y en 38 (21,3% accidentes la búsqueda por atención especializada fue inmediata. En 127 (74,7% accidentes el esquema de vacunas contra hepatitis B estaba completo. Así es imprescindible que las escuelas ofrezcan cursos y/o disciplinas específicas sobre medidas de bioseguridad incluyendo aspectos

  11. Decrease of noxious emissions in the residual fuel oil combustion; Disminucion de emisiones nocivas en la combustion de aceite combustible residual

    Energy Technology Data Exchange (ETDEWEB)

    Mandoki W, Jorge [Econergia S. de R. L. de C. V. Mexico, D. F. (Mexico)

    1994-12-31

    achieved. [Espanol] La combustion de aceite combustible residual emite sustancias nocivas como particulas carbonaceas, oxidos de nitrogeno y trioxido de azufre, a niveles inadmisibles. Agua emulsionada en el combustible reduce sustancialmente dichas emisiones, lograndose ademas, en la mayoria de los casos, un ahorro neto en el consumo de combustible. Se muestran los efectos beneficos de quemar el aceite combustible residual en forma de emulsion, asi como el metodo para producir una emulsion adecuada. La tecnologia del combustible emulsionado ofrece una opcion de bajo costo para reducir la contaminacion atmosferica. La calidad del aceite combustible residual ha estado declinando durante las ultimas decadas debido: 1. Al aumento en la produccion de petroleos crudos pesados generalmente con mayor contenido de asfaltenos y de azufre. 2. A menor disponibilidad de residuos de la destilacion al vacio debido a su conversion a productos de mayor valor. 3. A procesos de conversion mas intensivos, como cracking catalitico, {sup v}isbreaking{sup ,} etc., que aumentan la concentracion de asfaltenos en los fondos, ocasionando problemas de inestabilidad. 4. Al aumento en el contenido de vanadio y de otros metales a medida que aumenta la concentracion de asfaltenos. El uso de aceite combustible emulsionado proporciona un medio eficaz y economico para reducir sustancialmente las emisiones nocivas a la atmosfera. La emulsion contiene particulas de agua de un diametro entre 2 y 20 micras, dispersadas uniformemente dentro del aceite combustible, en una proporcion generalmente enter 5 y 10%; ademas contiene un agente tensioactivo para asegurar una emulsion estable, capaz de resistir los esfuerzos cortantes del sistema de bombeo y distribucion. Cuando las gotas de aceite combustible atomizado llegan a la camara de combustion, el agua esmulsionada en ellas se convierte instantaneamente en vapor de alta presion, ocasionando una violenta atomizacion secundaria. El efecto de esta atomizacion

  12. Modeling the effect of the seismic wave propagation in buried continuous pipelines; Modelacion del efecto de propagacion de ondas sismicas en tuberias continuas enterradas

    Energy Technology Data Exchange (ETDEWEB)

    Melchor Garcia, Nicolas Ageo

    2005-02-15

    -tuberia. Algunos modelos analiticos son presentados y discutidos con gran detalle. Se trata de contribuir en particular en los siguientes aspectos: Primero, intenta ser un trabajo de referencia para los ingenieros geotecnistas que se enfrentan a problemas relacionados con el fenomeno propagacion de ondas sismicas en estructuras enterradas o problemas afines, ya que dentro de la literatura consultada existen muchos principios aqui presentados que estan relacionados con la ingenieria sismica, el modulo de reaccion, asi como tambien con expresiones o investigaciones realizadas en pilotes. Segundo, se presenta un modelo numerico cuasiestatico que analiza la tuberia continua a traves de un vector de fuerzas de tipo senoidal. El analisis de los esfuerzos y deformaciones que le transmite el suelo a la tuberia se hace utilizando un modelo de interaccion suelo-tuberia. Para un nivel bajo de deformaciones se considera un comportamiento de transferencia elastico en la interfaz suelo-tuberia. En el caso de deformaciones mayores se supone que se presenta deslizamiento debido a que el suelo circundante presenta falla por cortante en el suelo que lo rodea. El analisis cubre unicamente el caso de deformaciones axiales en tramos rectos. Finalmente, intenta dar una serie de recomendaciones para futuros trabajos de investigacion sobre la modelacion de tuberias enterradas. En este trabajo, la influencia de varios aspectos sobre la respuesta de tuberias a la propagacion de ondas sismicas es analizada y discutida; tales como las condiciones de topografia, geologia, estratigrafia del suelo y los cambios de rigidez en el suelo que se encuentra alrededor de la tuberia.

  13. Cubierta laminar prefabricada, Suiza

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    Hossdorf, Heinz

    1964-04-01

    principio, despiezar la cubierta en una serie de elementos prefabricados de repetición múltiple, hecho del que se desprenden evidentes ventajas desde el punto de vista económico. La sucesión de tramos cilíndricos permite la aplicación indefinida del método constructivo empleado. Los elementos laminares prefabricados se han reforzado con nervios laterales que les dan suficiente rigidez para su transporte y colocación en obra. Cada elemento tiene 25,20 m de longitud y 1,40 m de luz o anchura. El total de elementos de este tipo colocados encubierta es de 18. Una particularidad de esta cubierta consiste en aplicarle un pretensado constituido por cables, de trazado curvo, apoyados sobre el trasdós de cada superficie cilíndrica que constituye un tramo. El trazado mejora la estabilidad y resistencia de la lámina, creando esfuerzos favorables que disminuyen notablemente los efectos de la flexión y los esfuerzos cortantes. Los bordes de estas láminas se han reforzado aumentando el espesor de los nervios, con lo que se ha conseguido mejorar las condiciones de anclaje. Con objeto de comprobar los resultados obtenidos en el estudio analítico de esta estructura, se hicieron varios ensayos sobre modelo reducido.

  14. Effectiveness of the echoendoscopic puncture in the diagnosis of solid pancreatic mass Efetividade da punção ecoendoscópica no diagnóstico de massa pancreática sólida

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    Adriano Fernandes da Silva

    2009-12-01

    statistic difference regarding the experience of the endoscopy professional. Only 80 patients had the number of punctures written down and it was noticed that there is better performance as the number of punctures was increased. The definitive histopathologycal diagnosis of pancreatic neoplasia occurred in only 41(29,7 % patients. CONCLUSIONS: Regarding mass characteristics, when larger is the mass, larger is the positivity of the method; the location didn't correlate with higher positivity; when the lymph nodes were present, there was a tendency to positivity; concerning the number of punctures, the higher number, higher positivity; in relationship to the professional experience in endoscopy, there was no difference in the rate of positivity of the puncture of the solid pancreatic mass.RACIONAL: Ecoendoscopia é técnica mista que adiciona as vantagens da endoscopia àquelas da ecografia, somente que o procedimento ecográfico é realizado do interior dos órgãos para fora deles, no sentido centrífugo. OBJETIVO: Verificar a positividade da ecoendoscopia na punção com agulhas (EEPTN ou (EE-PAF em tumores sólidos pancreáticos baseados na técnica utilizada pelo Serviço de Endoscopia Digestiva do Hospital de Clínicas da Universidade de São Paulo. MÉTODOS: Cohorte retrospectiva de 138 pacientes que realizaram ecoendoscopia com punção aspirativa por agulha fina (EE-PAAF no período de maio de 2004 a junho de 2007. Os dados foram coletados por meio de consulta aos prontuários, constantes do arquivo médico. O critério de inclusão foi a presença de massa pancreática sólida à tomografia computadorizada e o critério de exclusão a presença de tumor pancreático não sólido. Foram utilizadas as seguintes variáveis: característica da massa (tamanho, localização, presença de linfonodo peripancreático, presença de linfonodo em tronco celíaco; número de punções para obtenção de microfragmento; citologia e experiência do profissional executante. O

  15. Uplift of the South African Plateau: mantle-scale deformation, long wavelength relief growth and offshore sediment budget

    Science.gov (United States)

    Guillocheau, François; Dauteuil, Olivier; Baby, Guillaume; Robin, Cécile

    2013-04-01

    ), feeding a smaller delta offshore Tugela River (Durban area - sedimentation rate around 15 000 km3/Ma). The mechanism of uplift, located along the Agulhas - Falklands Fracture Zone, is unknown. • Since at least Middle Miocene times, all those relief have been fossilized, with very low erosion rates (x1m/Ma), in response to the major aridification of southern Africa. Keywords: South Africa, Plateau uplift, Mantle dynamics, Climate, Siliciclastic sediment fluxes

  16. Avaliação da profundidade do espaço subaracnoideo com o uso do ultrassom

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    Alexandre Gnaho

    2012-08-01

    Full Text Available JUSTIFICATIVA E OBJETIVOS: Avaliar a fidelidade da ecografia para prever a profundidade dos espaços intratecais lombares e epidurais, a fim de limitar o número de tentativas de punção. MÉTODO: 31 pacientes (25 homens e seis mulheres, ASA I ou II participaram deste estudo. A imagem devolvida pelo ultrassom da espinha lombar foi executada no interespaço vertebral L3-L4 em plano transversal. Em seguida, um anestesista não previamente informado executou a anestesia espinal através do ponto previsto como alvo. A distância entre a pele e a parte anterior do flavum ligamentum que é supostamente o limite inferior da profundidade intratecal, ou uma aproximação da profundidade do espaço epidural (ED-US, foi medida por ultrassom sendo comparada com a distância entre a pele e a parte anterior do espaço do flavum ligamentum na agulha (ED-N. RESULTADOS: Os ED-US e os ED-N foram, respectivamente, de 5,15 ± 0,95 cm e de 5,14 ± 0.97 cm; essas distâncias não eram significativamente diferentes (p > 0,0001. A correlação significativa r = 0,982 [CI 95% 0,963-0,992, p > 0,0001] foi observada entre as medidas de ED-US e de ED-N. A análise Bland-Altman mostra uma precisão de 0,18 cm, com limites tolerados de -0,14 cm a -0,58 cm. CONCLUSÕES: Este estudo corrobora a utilidade da ultrassonografia em plano transversal que permite identificar as estruturas anatômicas axiais, podendo fornecer aos médicos informações eficientes para a execução da anestesia espinal.

  17. Rendimentos de carcaça, dos cortes comerciais e da porção comestível de bubalinos Murrah castrados abatidos com diferentes períodos de confinamento Yields of carcass, retail cuts and retail beef cuts of castrated Murrah buffaloes slaughtered at different periods of feedlot

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    Paulo Francisco Nogueira Bomfim Ferreira Menegucci

    2006-12-01

    Full Text Available Avaliaram-se as características de carcaça de búfalos Murrah castrados terminados em confinamento. Foram utilizados 20 bubalinos Murrah (15 meses de idade e peso inicial de 207 kg, castrados e descornados, divididos em quatro grupos homogêneos e abatidos aos 75, 100, 125, 150 dias de confinamento, após período de adaptação. Ao abate, as carcaças foram identificadas, resfriadas por 24 horas para pesagem e cálculo dos rendimentos das meias-carcaças, dos cortes dianteiro, ponta-de-agulha, traseiro total e serrote. Não houve diferença estatística para o rendimento de carcaça. Os pesos de traseiro total, serrote e dianteiro apresentaram aumento linear, porém, observou-se efeito cúbico do período de confinamento sobre os rendimentos de traseiro total e dianteiro. Verificou-se ainda aumento linear dos pesos de filé-mignon, contrafilé, fraldinha, coxão mole, coxão duro, lagarto, sebo, porção comestível e ossos. O período de confinamento promoveu efeito linear decrescente sobre os rendimentos de patinho, músculo traseiro e maminha + alcatra e linear crescente para fraldinha e sebo.The objective of this trial was to evaluate the carcass traits of feedlot castrated Murrah buffaloes. Twenty castrated hornless Murrah buffaloes averaging 15 months of age and initial body weight of 207 kg were used. Animals were divided in four groups and slaughtered at 75, 100, 125 or 150 days of feedlot after an adaptation period. At slaughter, carcasses were identified, cooled for 24 hours, and weighed for calculation of yields of half carcass, hindquarter, spare ribs, forequarter, and sawcut. There was no significant difference for carcass yield comparing the different periods of feedlot. Weights of sawcut, forequarter, hindquarter, tenderloin, strip loin, thin skirt, topside, outside flat, eye round, tallow, retail beef cuts, and bones all increased linearly while significant cubic effects were observed for yields of forequarter and hindquarter

  18. Identification of a non-host plant of Xylella fastidiosa to rear healthy sharpshooter vectors Identificação de uma planta não-hospedeira de Xylella fastidiosa para criação de insetos vetores sadios

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    Rosangela Cristina Marucci

    2003-12-01

    Full Text Available Rearing leafhopper (Hemiptera: Cicadellidae vectors free of Xylella fastidiosa is a requirement for studies of various aspects of vector-pathogen interactions. The selection of a plant that allows vector development but not bacterial multiplication is desirable to produce healthy vectors. In this study, two leafhopper hosts, Vernonia condensata ('boldo' and Aloysia virgata ('lixeira' were needle inoculated with citrus and coffee strains of X. fastidiosa to evaluate if these plants support pathogen colonization. The inoculated plants did not present symptoms and the pathogen was not detected by culture and PCR tests, neither soon after inoculation (7-14 days nor later, at 1, 4, 6 and 12 months after inoculation. To obtain healthy adults of the leafhopper vectors Acrogonia citrina, Bucephalogonia xanthophis, Dilobopterus costalimai, Homalodisca ignorata and Oncometopia facialis, early-instar nymphs were reared on V. condensata. X. fastidiosa was not detected in any of 175 adults obtained. V. condensata and A. virgata are nonpropagative hosts of X. fastidiosa and enable the production of healthy leafhoppers for vector studies.A obtenção de cigarrinhas (Hemiptera: Cicadellidae livres de Xylella fastidiosa é importante para estudos de interação entre essa bactéria e seus vetores, sendo desejável a seleção de uma planta que permita a criação desses insetos, mas não a multiplicação da bactéria. Neste estudo, duas plantas hospedeiras de cigarrinhas, Vernonia condensata (boldo e Aloysia virgata (lixeira, foram inoculadas por agulha com as estirpes de citros e de cafeeiro de X. fastidiosa, para avaliar a possibilidade deste patógeno colonizá-las. Não foram observados sintomas, nem se detectou a bactéria por isolamento em meio de cultura e/ou PCR em períodos curtos (7 e 14 dias ou longos (1, 4, 6 e 12 meses após a inoculação. Para obtenção de adultos sadios das cigarrinhas vetoras, Acrogonia citrina, Bucephalogonia xanthophis

  19. Bloqueio peridural caudal: técnica anestésica de uso exclusivo em crianças? É possível sua realização em adultos? Qual o papel do ultrassom nesse contexto?

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    Ilana Esquenazi Najman

    2011-02-01

    Full Text Available JUSTIFICATIVA E OBJETIVOS: O bloqueio peridural caudal é a mais popular entre todas as técnicas de anestesia regional em crianças. Com o avanço da idade, apenas a relativa dificuldade em localizar o hiato sacral limita seu uso. Entretanto, em adultos a técnica vem sendo largamente utilizada para controle de dor crônica com o auxílio da fluoroscopia. Assim, a habilidade em localizar o hiato e definir as variações anatômicas é o principal fator determinante do sucesso e segurança na execução do bloqueio peridural pela via caudal. Nesse contexto, o ultrassom vem ganhando espaço como guia para a realização do bloqueio caudal. O objetivo desta revisão foi elucidar o papel do ultrassom na anestesia caudal, além de demonstrar que o bloqueio caudal, muito utilizado em crianças, também é útil e pode ser usado em adultos. CONTEÚDO: Uma revisão literária sobre a anatomia da região sacral e da técnica anestésica necessária para a realização adequada do bloqueio caudal foi promovida. Além disso, artigos recentes sobre estudos realizados com bloqueios peridurais caudais guiados por ultrassom tanto em crianças quanto em adultos também foram incluídos. CONCLUSÕES: O ultrassom, apesar de suas limitações, pode ser útil como ferramenta adjuvante no posicionamento da agulha no espaço caudal. Permite a fácil identificação da anatomia sacral, além de visualização da injeção, em tempo real. Sua natureza portátil, não invasiva e livre de exposição à radiação faz dele uma tecnologia atrativa na sala operatória, principalmente na emergência de casos difíceis. Entretanto, como seu uso em bloqueios centrais do neuroeixo ainda é muito primitivo, é necessário que mais pesquisas sejam feitas para se consagre como técnica de rotina na prática anestésica.

  20. Retrospectiva de casos de corpos estranhos no tubo digestivo de gatos Retrospective study of foreign bodies cases at digestive tube in cats

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    Franklin de Almeida Sterman

    1997-12-01

    Full Text Available Neste trabalho são apresentados os resultados da revisão da casuística de 13 anos (1977-1989 sobre presença de corpos estranhos localizados no tubo digestivo de gatos atendidos pelo Serviço de Patologia e Clínica Cirúrgicas do Departamento de Cirurgia da Faculdade de Medicina Veterinária e Zootecnia da USP e triados pelo Hospital Veterinário da mesma entidade. Após exames clínico e radiográfico observou-se, em 12 felinos da raça Siamês e sem raça definida, machos e fêmeas com idade variando entre dois e 168 meses, corpos estranhos, localizados desde a orofaringe até intestino e de diferentes origens - ossos, agulhas, linha, plástico, borracha e bezoar - apresentando como principais sinais anorexia e vômitos. Nove gatos foram submetidos a intervenção cirúrgica para a resolução do processo e do total de animais com diagnóstico de corpo estranho no trato digestivo foi constatado um óbito. Conclui-se, pelo período avaliado, que os corpos estranhos no tubo digestivo de galos não são observados com frequência, apresentando prognóstico favorável de cura, e havendo tendência de aumento no número de casos.This study presents a 13 years casuistic review of oesophageal and gastrointestinal foreign bodies. The cases were admitted at the surgical pathology and clinics of the Surgery Department of the Faculdade de Medicina Veterinária e Zootecnia da Universidade de São Paulo. At clinical and radiographic examination, foreign bodies were detected in 12 cats, with age from 2 to 168 months, without prevalence of sex and affecting more cats with indefined breed. The found foreign bodies were located from oropharinx to intestines, among them: bones, needles, string, plastic, rubber and bezoar, presentingg as main clinical signs: anorexia and vomiting. Surgery was performed to solve the problem and among all the animals, onty one death ocurred. This review shows that foreign bodies are not common in cats and usually have good

  1. Comparação de diferentes doses de colagenase em modelo de indução de tendinite para eqüinos: estudo clínico e ultra-sonográfico Comparison of different doses of collagenase-induced equine tendonitis: clinical and ultrasonographic study

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    Ana Lucia Miluzzi Yamada

    2009-07-01

    Full Text Available Neste estudo, lesões tendíneas foram induzidas experimentalmente em eqüinos por meio da administração de diferentes doses de colagenase. Foram usados 12 eqüinos adultos, clinicamente sadios e distribuídos aleatoriamente em dois grupos que receberam diferentes doses de colagenase. O grupo 1 (G1 recebeu 1,25mg e o grupo 2 (G2 recebeu 2,5mg de colagenase. Com a agulha posicionada no centro dos tendões flexores digitais superficiais dos membros torácicos, as diferentes doses de colagenase foram aplicadas conforme o grupo experimental. O acompanhamento das lesões tendíneas baseou-se em exames físicos e ultra-sonográficos, realizados a cada sete dias até o período de 28 dias pós-indução. Nas imagens ultra-sonográficas, foram avaliados os parâmetros ecogenicidade, percentual de área lesada, grau de redução e severidade das lesões do tendão flexor digital superficial. O parâmetro mais fiel em resposta às diferentes doses de colagenase administradas foi o percentual de área lesada no interior do tendão. O G2 apresentou uma melhor resposta ultra-sonográfica da tendinite do flexor digital superficial para a realização de estudos experimentais.In this study, tendinous injuries were induced experimentally in horses, through the administration of different doses of collagenase. Twelve horses, clinically healthy, were distributed into two groups that received different doses of collagenase. Group 1 (G1 received 1.25mg and Group 2 (G2 received 2.5mg of collagenase. With the needle positioned at the center of the superficial digital flexor tendon in the equine forelimbs, different doses of collagenase were applied in agreement the experimental group. The monitoring of colagenase-induced tendonitis was based on physical and ultrasonographic exams, carried out every seven days until the period of 28 days post-induction. In the images of ultrasound were evaluated the echogenicity, the percentage of injured area, degree of reduction

  2. Miopatia por corpos esferóides: relato de caso Spheroid body myopathy: case report

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    Rosana Hermínia Scola

    2005-06-01

    Full Text Available A miopatia por corpos esferóides é doença rara, classificada no grupo das miopatias congênitas relacionadas aos distúrbios da desmina; apresenta, em geral, origem autossômica dominante e com início dos sintomas na fase adulta. Relatamos o caso de menina de sete anos, com diparesia facial, hipotrofia e hipotonia muscular generalizadas, arreflexia profunda generalizada, força muscular proximal nos membros superiores e inferiores e distal dos membros superiores grau 3 e distal nos membros inferiores grau 1. A eletromiografia de agulha evidenciou recrutamento aumentado e potenciais de unidade motora de curta duração e baixa amplitude, caracterizando um padrão miopático. A biópsia muscular revelou padrão misto para miopatia e desinervação e presença de corpos esferóides intracitoplasmáticos compatíveis com a miopatia por corpos esferóides. No presente caso, a paciente apresentou precocemente o início dos sintomas e não há relatos de casos semelhantes na família.Spheroid body myopathy is a rare illness classified in the group of the congenital myopathies as a desmin-related neuromuscular disorder, presenting dominant autosomical origin with the beginning of the symptoms in the adult phase. We report on a seven years old girl with facial paresia, generalized muscular hypotrophy and hypotony, generalized deep areflexia, proximal upper and lower limbs muscular strengh and distal upper limbs grade 3 and distal lower limbs grade 1. Needle electromyography evidenced increased conscription and potentials of motor unit of short duration and low amplitude, characterizing a myopathic standard. The muscle biopsy disclosed mixed standard to myopathy, denervation and inclusion bodies that are consistent to spheroid body myopathy. In this case, the patient presented, in advance, early beginning of the symptoms and there are no similar cases in the family.

  3. Bloqueio do nervo isquiático por abordagem posterior simplificada no ponto médio do sulco glúteo-femoral: estudo com diferentes volumes de lidocaína a 1%

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    Fonseca Neuber Martins

    2006-01-01

    Full Text Available JUSTIFICATIVA E OBJETIVOS: O bloqueio do nervo isquiático por via subglútea foi descrito com sucesso em estudo anterior, sendo mais uma opção entre as várias abordagens possíveis. O nervo isquiático torna-se superficial na borda inferior do músculo glúteo máximo, permitindo seu acesso com fácil localização, pouco desconforto e baixo risco de punção acidental de grandes vasos. O objetivo deste estudo foi avaliar o bloqueio do nervo isquiático por esta abordagem simplificada com diferentes volumes de lidocaína a 1%. MÉTODO: Foram estudados 40 pacientes com intervenções cirúrgicas na perna ou no pé distribuídos em dois grupos. Após monitorização, eles foram posicionados em decúbito ventral e realizado bloqueio no ponto médio do sulco glúteo-femoral, com auxílio de neuroestimulador e agulha de 5 cm eletricamente isolada, utilizando 300 mg (G1 ou 200 mg (G2 de lidocaína a 1% sem adrenalina. RESULTADOS: Obteve-se anestesia adequada em todos os casos com o volume e a concentração usados. O tempo de execução do bloqueio foi de 8,6 ? 5,7 min (G1 e 5,6 ? 5,7 min (G2. A latência foi de 5,98 ? 1,4 min (G1 e 6,7 ? 2,9 min (G2. A duração sensitiva e motora do bloqueio foi de 243 ? 37 min e 152 ? 30 min (G1 e 235 ? 39 min e 149 ? 59 min (G2, respectivamente. Não foram observadas diferenças estatísticas significativas entre os grupos estudados. CONCLUSÕES: Essa abordagem é eficaz e de fácil execução, podendo a dose total de anestésico ser reduzida sem comprometimento da qualidade.

  4. Ação do radium sôbre o vírus da Coriomeningite linfocitária benigna Radium effect upon the lymphocytic choriomeningitis virus

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    J. Guilherme Lacorte

    1968-01-01

    Full Text Available O presente trabalho faz parte de uma seqüência iniciada em 1953 com a verificação do efeito dos raios X sôbre o vírus da gripe em que observamos que os mesmos, em doses fracas, tem aumentado o seu poder patogênico para camundongos. Posteriormente, verificamos a ação do radium sôbre o vírus da gripe e da poliomielite. Neste último caso, o vírus irradiado mostrou-se ativo durante maior número de dias. Nas pesquisas aqui referidas, submetemos o vírus da coriomeningite linfocitária benigna a ação do radium, usando quatro agulhas de 1 mg desse elemento em dispositivo que idealizamos para êste fim. Depois de irradiada, foi a suspensão de vírus diluida a 10*-1, 10*-2 e 10*-3 para as inoculações em camundongos, juntamente com as diluições testemunhas. Observamos que o vírus resistiu pelo menos 264 dias, à temperatura de 4ºC. Quanto às alterações do poder patogênico provocadas pelo radium verificamos que o mesmo não se altera após 24 horas de irradiação. Diminue após 8 dias para aumentar, de modo seguro, após 20 e 33 dias. Iguala-se ao testemunha depois de 78 dias.In the present paper the authors refered the experiments made with the lymphocytic chriomeningitis virus. We strain, after exposition to 4 tubes of 1 mg of radium. The virus suspension was put into the Carrel flask in a layer of 0,1 cm. The titrations of the irradiated virus suspension were made after 24 hours, 8, 20, 33, 78, 85, 120, 264, 292, 387 and 535 days. the virus was still active after 264 days, not after 292 days. The virus irradiated during 24 hours presented the same pathogenicity form mice than the control but after 8 days it was lesser and after 20 and 33 days it was enchanced (Graphic 10. After 78 days the pathogenic power was the same for the irradiated virus and the control.

  5. Continental and sea surface temperature variability in southeast Africa (Zambezi River region) since MIS 3

    Science.gov (United States)

    Castañeda, I. S.; Tjallingii, R.; Wang, Y. V.; Mets, A.; van der Lubbe, J.; Brummer, G.; Sinninghe Damste, J. S.; Schneider, R. R.; Schouten, S.

    2010-12-01

    At present, few paleoclimate records exist from the region of southeast Africa. The continental climate history of southeast Africa is of much interest since this region falls under the influence of both the Intertropical Convergence Zone (ITCZ) and Congo Air Boundary (CAB) and likely experienced considerably different hydrological conditions when glacial conditions prevailed. Likewise, the paleoceanographic history of the Mozambique Channel of the coast of southeast Africa is of much interest since mesoscale eddies (Agulhas rings) formed in this region transport and release warm and saline Indian Ocean waters into the South Atlantic influencing the buoyancy of Atlantic thermocline waters, deep-water formation, and Atlantic Meridional Overturning Circulation. Sea surface temperatures (SST) of the southern Indian Ocean are additionally important for modulating precipitation in southeast Africa. Here, we utilize multiple organic (TEX86, BIT Index, MBT, CBT) and inorganic (XRF core scanning) geochemical proxies on a sediment core collected from near the Zambezi River (core 64PE304-80; -18.24 °S, 37.87 °E) to examine continental conditions within the Zambezi River catchment as well as the SST history of the Mozambique Channel. Throughout the ~38 kyr record of 64PE304-80, variations in the BIT Index, a proxy for marine vs. soil organic matter input, closely track changes in the log (Ca/Ti) ratio, a proxy for marine vs. lithogenic input. These records indicate increased lithogenic/soil OM contributions in the Late Pleistocene portion of the record whereas the Holocene is characterized by increased marine contributions. This pattern likely reflects closer proximity of the Zambezi river mouth and transport of terrestrial material to the coring site during the last glacial sea-level lowstand. A particularly interesting feature of these records is pronounced millennial-scale fluctuations occurring within Marine Isotope Stages (MIS) 2 and 3, which posses a similar structure

  6. Eficácia analgésica pós-operatória de diferentes volumes e massas de ropivacaína no bloqueio de plexo braquial pela via posterior

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    Bruno Salome de Morais

    2012-02-01

    Full Text Available JUSTIFICATIVA E OBJETIVOS: O bloqueio do plexo braquial pela via posterior tem sua eficácia para cirurgias de ombro demonstrada por diferentes autores. Entretanto, não há um consenso sobre a massa e o volume ideal de anestésico local a ser empregado. O objetivo deste estudo é com parar diferentes volumes e massas de ropivacaína no bloqueio do plexo braquial pela via posterior em cirurgias artroscópicas de ombro. MÉTODO: Sessenta pacientes com idade > 18 anos, estado físico ASA I e II, escalados para cirurgias artroscópicas de ombro unilateral foram alocados aleatoriamente em três grupos: A (10 mL a 0,5%, B (20 mL a 0,5%, C (5 mL a 1%. O bloqueio foi realizado com agulha 22G de 100 mm conectada ao neuroestimulador, em um ponto 3 cm lateral ao ponto médio do interespaço de C6 e C7, sendo injetada a solução correspondente a cada grupo. A dor pós-operatória foi avaliada na SRPA e nas primeiras 24 horas do pós-operatório. Os grupos foram comparados quanto ao tempo para primeira queixa de dor, à pontuação na ENV e ao consumo de morfina nas primeiras 24 horas. RESULTADOS: Não houve diferença estatisticamente significativa entre os três grupos em relação a idade, peso e altura. Não houve diferença no tempo até a primeira queixa de dor, ENV superior a três e consumo de morfina no pós-operatório entre os grupos. CONCLUSÕES: O presente estudo concluiu que 5 mL de ropivacaína 1% promoveu eficácia analgésica similar a 10 mL ou 20 mL de ropivacaína 0,5% no bloqueio do plexo braquial pela via posterior com o uso do neuroestimulador

  7. Determinação do volume mínimo efetivo de bupivacaína 0,5% para bloqueio do plexo braquial por via axilar guiado por ultrassom

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    Leonardo Henrique Cunha Ferraro

    2014-01-01

    Full Text Available Justificativa e objetivo: o uso do ultrassom para acompanhar o correto posicionamento da agulha e a dispersão do anestésico local permitiu a redução do volume de anestésico local necessário para o bloqueio de nervos periféricos. Existem poucos trabalhos sobre o volume mínimo efetivo de anestésico local para o bloqueio do plexo braquial via axilar (BPVA. Este estudo foi conduzido com o objetivo de determinar o volume mínimo efetivo (VE90 de bupivacaína 0,5% comadrenalina (1:200.000 para o BPVA guiado por ultrassom. Método: o método up-and-down proposto por Massey e Dixon foi usado para o cálculo do volume mínimo efetivo. A dose inicial foi de 5 ml por nervo (radial, mediano, ulnar e musculocutâneo. No caso de falha do bloqueio, o volume era aumentado em 0,5 mL por nervo. O sucesso do bloqueio resultava na diminuição do volume em 0,5 mL por nervo para o paciente subsequente. O sucesso do bloqueio foi definido como bloqueio da função motora ≤ 2 segundo a escala de Bromage modificada, ausência de sensibilidade térmica e de resposta ao pinprick. Foi definido como critério para término do estudo a obtenção de cinco casos de falha seguidos de casos de sucesso. Resultados: foram incluídos 19 pacientes no estudo. O volume mínimo efetivo (VE90 de bupi-vacaína 0,5% com 1:200.000 de adrenalina foi de 1,56 ml (IC 95% 0,99-3,5 por nervo. Conclusão: este trabalho corrobora alguns estudos que mostram que é possível obter anestesia cirúrgica com baixos volumes de anestésico local para bloqueios de nervo periférico guiados por ultrassom.

  8. Efeitos da ablação e da excitação do hipocampo no homem

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    Jayme Vianna

    1953-09-01

    Full Text Available A atividade do cíngulo anterior pode ser modificada pela ablação ou excitação do hipocampo; partindo dêste princípio, que se baseia em dados experimentais e anatômicos, o autor pensa ser possível influenciar a evolução de certas enfermidades nervosas e mentais pela ablação do hipocampo. O autor realizou 10 intervenções em doentes mentais, sendo 5 ablações bilaterais do hipocampo e 3 unilaterais; nos 2 outros restantes foi feito o acesso simples ao hipocampo sem ablação, o que é o mesmo que fazer o "undercutting" do giro fusiforme. Nos casos de "undercutting" foram implantados, no hipocampo, eletrodos e agulhas por meio dos quais foram feitas excitações elétrica e química (injeção de acetilcolina com prostigmina e de estricnina depois de cessado o efeito anestésico. O estímulo elétrico com 5 e 10 ciclos por segundo produziu aumento da amplitude e freqüência respiratórias e aceleração do pulso em mais de 10%. A pressão arterial não foi influenciada. A injeção da acetilcolina com prostigmina produziu apenas elevação da pressão mínima. Os efeitos produzidos pela injeção de estricnina foram semelhantes aos da excitação elétrica, embora menos nítidos. O pouco tempo de observação e o pequeno número de casos não permitem conclusões sôbre a influência da ablação do hipocampo na evolução dos distúrbios psíquicos e neurológicos. Parece, entretanto, que certos distúrbios de conduta na criança podem ser beneficiados pela ablação bilateral do hipocampo.

  9. Simulação humana digital na concepção de postos de trabalho: estudo comparativo de casos Digital human simulation for ergonomic workplace design: comparative study of cases

    Directory of Open Access Journals (Sweden)

    Daniel Braatz

    2012-01-01

    Full Text Available Este artigo apresenta como a ferramenta computacional de Modelagem e Simulação Humana contextualizada pela Análise Ergonômica do Trabalho (AET e pela análise da Atividade Futura Possível pode auxiliar nos processos de projeto de postos de trabalho. São analisados dois estudos de caso nos quais a Simulação Humana foi empregada com auxílio do software Jack. O primeiro estudo aborda a concepção de um balcão de atendimento em uma empresa pública de serviços postais. O segundo apresenta o desenvolvimento de uma estação de trabalho de abastecimento de agulhas cirúrgicas em uma empresa de manufatura de produtos relacionados às áreas de saúde e higiene. A partir dos resultados dos estudos de caso, são explicitadas as contribuições e desafios da utilização dessa tecnologia em projetos visando equacionar as questões de saúde e produtividade. O uso da simulação integrada ao processo de intervenção da AET permitiu melhorar a antecipação das futuras atividades prováveis das novas situações de trabalho e auxiliou a integração e comunicação dos atores envolvidos nesses processos sociais.This paper investigates a computational tool for Human Modeling and Simulation contextualized by Ergonomic Analysis of Work (EAW and future work activity forecasting that can assist in the design processes of workplaces. Two case studies using Human Simulation was employed and the software Jack were analyzed. The first study presents the design of a counter in a public post office. The second shows the development of a workstation for the supply of surgical needles in a company that manufactures hygiene and healthcare products. The results of the case studies show the contributions and challenges of using this design technology aiming to solve problems related to health and productivity. The use of simulation combined with EAW helped to improve future work activity forecasting of new work situations and helped the integration and

  10. Observations of the southern East Madagascar Current and undercurrent and countercurrent system

    Science.gov (United States)

    Nauw, J. J.; van Aken, H. M.; Webb, A.; Lutjeharms, J. R. E.; de Ruijter, W. P. M.

    2008-08-01

    In April 2001 four hydrographic sections perpendicular to the southern East Madagascar Current were surveyed as part of the Agulhas Current Sources Experiment. Observations with a vessel mounted and a lowered ADCP produced information on the current field while temperature, salinity, oxygen and nutrient data obtained with a CTD-Rosette system, gave information on the water mass structure of the currents southeast of Madagascar. The peak velocity in the pole-ward East Madagascar Current through these four sections had a typical magnitude of ˜110 cm/s, while the width of this current was of the order of 120 km. The mean pole-ward volume transport rate of this current during the survey above the 5°C isotherm was estimated to be 37 ± 10 Sv. On all four sections an undercurrent was observed at intermediate depths below the East Madagascar Current. Its equator-ward transport rate amounted to 2.8 ± 1.4 Sv. Offshore of the East Madagascar Current the shallow South Indian Ocean Countercurrent was observed. This eastward frontal jet coincided with the barotropic and thermohaline front that separates the saline Subtropical Surface Water from the fresher Tropical Surface Water in the East Madagascar Current. The near-surface geostrophic flow of the East Madagascar Current, derived from satellite altimetry data from 1992 to 2005, suggests a strong variability of this transport due to eddy variability and interannual changes. The long-term pole-ward mean transport of the East Madagascar Current, roughly estimated from those altimetry data amounts to 32 Sv. The upper-ocean water mass of the East Madagascar Current was very saline in 2001, compared to WOCE surveys from 1995. Comparison of our undercurrent data with those of the WOCE surveys in 1995 confirms that the undercurrent is a recurrent feature. Its water mass properties are relatively saline, due to the presence of water originating from the Red Sea outflow at intermediate levels. The saline water was advected from the

  11. Circulation of Antarctic intermediate water in the South Indian Ocean

    Science.gov (United States)

    Fine, Rana A.

    1993-10-01

    Chlorofluorocarbon (CFC) and hydrographic data collected on the R.R.S. Charles Darwin Cruise 29 along 32°S during November-December 1987, are used to examine the circulation in the South Indian Ocean. The emphasis is on Antarctic Intermediate Water (AAIW); bottom waters and mode waters are also examined. Bottom waters entering in the western boundary of the Crozet Basin (about 60°E) and in the Mozambique Basin (about 40°E) have low concentrations of anthropogenic CFCs. The rest of the bottom and deep waters up to about 2000 m have concentrations that are below blank levels. Above the intermediate waters there are injections of mode waters, which are progressively denser in the eastward direction. They form a broad subsurface CFC maximum between 200 and 400 m. The injections of recently ventilated (with respect to CFCs and oxygen) Subantarctic Mode Waters (SAMWs) at different densities indicate that there is considerable exchange between the subtropical and subantarctic regions. The tracer data presented show that the circulation of AAIW in the South Indian Ocean is different from that in the South Atlantic and South Pacific oceans in several ways. (1) The most recently ventilated AAIW is observed in a compact anticyclonic gyre west of 72°E. The shallow topography (e.g. that extending northeastward from the Kerguelen Plateau) may deflect and limit the eastward extent of the most recently ventilated AAIW. As a consequence, there is a zonal offset in the South Indian Ocean of the location of the most recently ventilated SAMW and AAIW, which does not occur in the other two oceans. The strongest component of SAMW is in the east, while the AAIW is strongest in the western-central South Indian Ocean. The offset results in a higher vertical gradient in CFCs in the east. (2) The Agulhas Current may impede input of AAIW along the western boundary. (3) Tracers are consistent with an inter-ocean flow from the South Pacific into the Eastern Indian Ocean, similar to the

  12. A hydrographic section across the subtropical South Indian Ocean

    Science.gov (United States)

    Toole, John M.; Warren, Bruce A.

    1993-10-01

    Features of the water-property and circulation fields at the southern limit of the continentally bounded Indian Ocean are described on the basis of a transoceanic hydrographic section occupied along roughly Lat. 32°S by the R.R.S. Charles Darwin in November-December 1987. Primary observations consisted of 106 full-depth CTD/O 2 stations with discrete measurements of the concentrations of dissolved silica, phosphate and nitrate. The section lies in the southern part of the South Indian subtropical gyre; water-property features in the upper kilometer indicate that the northward interior flow is predominantly in the eastern half of the ocean there, consistent with the forcing pattern of wind-stress curl. The southward return flow is the Agulhas Current, whose transport at Lats 31-32°S is estimated as 85 × 10 6 m 3 s -1. Circumpolar Deep Water flows northward to fill the greater deep Indian Ocean by means of western-boundary currents in the Crozet Basin, Central Indian Basin and Perth Basin. North Atlantic Deep Water entering directly from the mid-latitude South Atlantic is almost entirely confined to the south-western Indian Ocean (Mozambique Basin, Natal Valley) by the topography of the Madagascar Ridge and Mozambique Channel. Geostrophic transport figures are presented based on a zero-velocity surface constructed along the section from the tracer-property evidence of where deep water was moving northward and where southward. Ekman transport, deduced from shipboard acoustic-Doppler profiler measurements, as well as synoptic and historical wind stress data, is found to be small (about 1 × 10 6 m 3 s -1 northward). Net transport (geostrophic and Ekman) across the section is estimated to be 7 × 10 6 m 3 s -1 southward, which implies a similarly sized Indonesia throughflow. Ambiquity in the geostrophic referencing scheme, and the magnitude of baroclinic eddy noise on the section, suggest this figure in uncertain by at least ±10 × 10 6mm 3 s -1. The calculations

  13. Genetic structuring and migration patterns of Atlantic bigeye tuna, Thunnus obesus (Lowe, 1839

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    Beerli Peter

    2008-09-01

    Full Text Available Abstract Background Large pelagic fishes are generally thought to have little population genetic structuring based on their cosmopolitan distribution, large population sizes and high dispersal capacities. However, gene flow can be influenced by ecological (e.g. homing behaviour and physical (e.g. present-day ocean currents, past changes in sea temperature and levels factors. In this regard, Atlantic bigeye tuna shows an interesting genetic structuring pattern with two highly divergent mitochondrial clades (Clades I and II, which are assumed to have been originated during the last Pleistocene glacial maxima. We assess genetic structure patterns of Atlantic bigeye tuna at the nuclear level, and compare them with mitochondrial evidence. Results We examined allele size variation of nine microsatellite loci in 380 individuals from the Gulf of Guinea, Canary, Azores, Canada, Indian Ocean, and Pacific Ocean. To investigate temporal stability of genetic structure, three Atlantic Ocean sites were re-sampled a second year. Hierarchical AMOVA tests, RST pairwise comparisons, isolation by distance (Mantel tests, Bayesian clustering analyses, and coalescence-based migration rate inferences supported unrestricted gene flow within the Atlantic Ocean at the nuclear level, and therefore interbreeding between individuals belonging to both mitochondrial clades. Moreover, departures from HWE in several loci were inferred for the samples of Guinea, and attributed to a Wahlund effect supporting the role of this region as a spawning and nursery area. Our microsatellite data supported a single worldwide panmictic unit for bigeye tunas. Despite the strong Agulhas Current, immigration rates seem to be higher from the Atlantic Ocean into the Indo-Pacific Ocean, but the actual number of individuals moving per generation is relatively low compared to the large population sizes inhabiting each ocean basin. Conclusion Lack of congruence between mt and nuclear evidences, which

  14. Lesão de nervo cutâneo antebraquial lateral relacionada à venipuntura: o que saber?

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    Juan A. Ramos

    2014-04-01

    Full Text Available Justificativa e objetivos: a venipuntura é um dos procedimentos mais comuns na prática anestésica cotidiana. Embora geralmente inócuas, lesões de nervos periféricos com sequelas graves foram descritas após venipuntura. Apresentamos um caso de lesão de nervo cutâneo antebraquial lateral relacionada à venipuntura, juntamente com as informações de diagnóstico e prognóstico essenciais para a prática cotidiana. Relato de caso: paciente do sexo masculino, 27 anos, submetido à venipuntura de fossa antecubital direita, com uma agulha de calibre 20, para avaliação metabólica de rotina. O paciente sofreu uma dor aguda, tipo choque elétrico, que percorreu a face lateral do antebraço desde a fossa antecubital proximal até o pulso lateral direito e a base do polegar direito. Após 24 horas, o paciente ainda sentia a dor semelhante a choque elétrico que foi classificada como 8/10 no braço distal lateral direito, no pulso lateral direito e na base do polegar, acompanhada de parestesia. Fizemos uma revisão da literatura e o paciente recebeu orientação sobre os resultados publicados a respeito desse tipo de lesão. Durante o acompanhamento, o paciente relatou que a disestesia diminuiu cerca de 3-4 semanas após a lesão inicial e que não restou déficit neurológico. Conclusões: lesões de nervos periféricos foram descritas pós-venipuntura, mas a literatura é limitada. Os nervos da fossa antecubital estão classicamente localizados em um plano logo abaixo - e muito próximos - das veias, o que os torna susceptíveis a lesões durante a flebotomia; além disso, sabe-se que existe uma extensa variação anatômica, o que sugere que mesmo uma venipuntura satisfatória não traumática pode danificar diretamente esses nervos. O anestesiologista deve estar ciente dessa possível complicação e também do diagnóstico e prognóstico para orientar os pacientes de forma adequada, caso essa complicação ocorra.

  15. HIV prevalence and risk factors in a Brazilian penitentiary Prevalência e fatores de risco para a infecção pelo HIV em penitenciária brasileira

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    Harnoldo Colares Coelho

    2007-09-01

    mostraram preditoras de forma independente da infecção pelo HIV foram: tempo total da pena a ser cumprida inferior a cinco anos e compartilhamento de agulhas e seringas.

  16. Predictive markers for hepatitis C virus infection among Brazilian inmates Marcadores preditivos para infecção do vírus da hepatite C em presidiários brasileiros

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    Harnoldo Colares Coelho

    2009-08-01

    Full Text Available Hepatitis C virus (HCV infection has quite high prevalence in the prison system, reaching rates of up to 40%. This survey aimed to estimate the prevalence of HCV infection and evaluate risk factors for this exposure among male inmates at the Ribeirão Preto Prison, State of São Paulo, Brazil, between May and August 2003. A total of 333 participants were interviewed using a standardized questionnaire and underwent immunoenzymatic assaying to investigate anti-HCV. The prevalence of HCV infection among the inmates was 8.7% (95% CI: 5.7-11.7. The participants'mean age was 30.1 years, and the prevalence was predominantly among individuals over 30 years of age. Multivariate analysis showed that the variables that were independently associated with HCV infection were age > 30 years, tattooing, history of previous hepatitis, previous injection drug use and previous needle-sharing.Infecção pelo vírus da hepatite C no sistema prisional apresenta elevada prevalência, chegando a atingir cifras superiores a 40%. Esta pesquisa objetivou estimar a prevalência do HCV e avaliar fatores de risco para esta exposição na população masculina carcerária da Penitenciária de Ribeirão Preto - SP, no período de maio a agosto de 2003. Um total de 333 participantes foi submetido à aplicação de um questionário padronizado e a ensaio imunoenzimático para pesquisa de anti-HCV. A prevalência encontrada de infecção pelo HCV nos presidiários foi de 8,7% (IC 95%: 5,7-11,7. A média de idade dos participantes foi de 30,1 anos, com a prevalência predominando nos indivíduos acima de 30 anos. Na análise multivariada, as variáveis que se mostraram associadas de forma independente à infecção pelo HCV foram idade > 30 anos, tatuagem, história prévia de hepatite, passado de uso de droga injetável e passado de compartilhamento de agulhas.

  17. Numerical Modelling of circulation and internal tides on the Crozet plateau in support of the IMS/CTBTO hydroacoustic installation HA04

    Science.gov (United States)

    Lyard, Florent Henri; Zampolli, Mario; Marsaleix, Patrick

    2014-05-01

    Hydrophone stations of the Comprehensive Nuclear-Test-Ban Organisation (CTBTO) International Monitoring System (IMS), with the exception of one in Australia, comprise two triplets of submerged moored hydrophones, one North and one South of the island from which the respective system is deployed. Triplet distances vary approximately between 50 - 100 km kilometres from the island, with each triplet connected to the receiving shore equipment by fibre-optic submarine data cables. Once deployed, the systems relay underwater acoustic waveforms in the band 1 - 100 Hz in real time to Vienna via a shore based satellite link. The design life of hydroacoustic stations is at least 20 years, without need for any maintenance of the underwater system. The re-establishment of hydrophone monitoring station HA04 at Crozet (French Southern and Antarctic Territories) in the South-Western Indian Ocean is currently being investigated. The highly dynamic ocean environment at Crozet is governed by strong winds and generally high sea states at the surface, local circulation emanating from the sub-Antarctic front (SAF) and the Agulhas return current (ARC), moderate surface tides and strong internal tides. Deploying the submarine cables and triplets in such an environment requires careful evaluation of all risks and in particular the minimization of the exposure of the deployed system to excessively strong currents. This issue has been addressed by two studies which are briefly introduced here. In the first study, a linear spectral model was used to study and characterize the barotropic tide-driven currents on the Crozet plateau in three spatial dimensions. The M2 semi-diurnal component was shown to dominate in the area, driving sizeable internal tides. The estimate was quantitatively and spatially refined in the second study, in which a time stepping model was used taking into account the local ocean climatology and stratification, as well as the interplay between the seasonally varying

  18. Evolution of an alumina-magnesia/self-forming spinel castable. Part I: Microstructural features Evolução de um refratário de espinélio auto-formado de alumina-magnésia. Parte I: Aspectos microestruturais

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    D. Gutiérrez-Campos

    1999-06-01

    Full Text Available Refractories containing magnesium aluminate spinel (MgAl2O4 are materials for emerging technology in several applications like cement and steelmaking processes. In order to deep the understanding of these castables, this work presents the microstructural characteristics of an alumina-magnesia/self-forming spinel castable. Several variables such as MgO content, firing temperature and spinel formation are analyzed through XRD and SEM analysis. The results showed that the processes of spinel formation and nucleation are not strongly affected by the MgO content, but that the crystal growth is enhanced for samples with 6.0 wt% MgO. Hibonite (CA6 bonding in the castable matrix showed a needlelike structure that could increase hot properties of the material. MgO content in the castable seems to affect the hibonite development. The development of a self-forming spinel castable without any synthetic spinel grains appears to be promissory for optimum refractory linings.Refratários contendo espinélio de aluminato de magnésio (MgAl2O4 são materiais para tecnologia emergentes em várias aplicações tais como cimento e processos siderúrgicos. Com a finalidade de melhorar o entendimento destes refratários, este trabalho apresenta as características microestruturais de um refratário espinélio auto-formado de alumina-magnésia. Várias variáveis tais como teor de MgO, temperatura de queima e formação de espinélio são analisadas por meio de difração de raios X e microscopia eletrônica de varredura. Os resultados mostram que os processos de formação de espinélio e de nucleação não são fortemente influenciados pelo teor de MgO, mas que o crescimento de cristal é aumentado para amostras com 6.0% em peso de MgO. A ligação hibonita (CA6 na matriz do refratário mostrou uma estrutura tipo agulha que poderia melhorar as propriedades a quente do material. O teor de MgO no refratário parece influenciar o desenvolvimento da hibonita. O

  19. Orbital and Millennial-scale Variability Reflected on Continental-scale Vegetation Changes in the Southern Subtropics between MIS 6 and 3

    Science.gov (United States)

    Urrego, D. H.; Sanchez Goni, M.; Daniau, A.; Martinez, P.

    2011-12-01

    interglacial results from increased rainfall associated with enhanced Agulhas leakage and southward movement of the maximum westerlies. Our results shed light on the relationships between millennial and orbital-scale vegetation variations and atmospheric and oceanic climatic mechanisms in the southern subtropics during the previous glacial-interglacial cycle. References 1. L. Pichevin, P. Bertrand, M. Boussafir, J.-R. Disnar, Organic Geochemistry 35, 543 (2004). 2. L. Pichevin, M. Cremer, J. Giraudeau, P. Bertrand, Marine Geology 218, 81 (2005). 3. A. L. Daniau et al, Nature Climate Change, (submitted).

  20. Nutrient regime and upwelling in the northern Benguela since the middle Holocene in a global context – a multi-proxy approach

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    S. Meisel

    2011-08-01

    Full Text Available The last 5500 years of climate change and environmental response in the northern Benguela Coastal Upwelling are reconstructed by means of three sediment cores from the inner shelf off central Namibia. The study is based on nutrient (δ15N, δ13C and productivity proxies (accumulation rates of total organic carbon; ARTOC. Reconstructed sea surface temperatures (alkenone-derived SST and temperatures at subsurface depths (Tδ18O; based on tests of planktonic foraminifers reflect the physical boundary conditions. The selection of proxy indicators proved a valuable basis for robust palaeo-climatic reconstructions, with the resolution ranging from multi-decadal (NAM1 over centennial (core 178 to millennial scale (core 226620. The northern Benguela experienced pronounced and rapid perturbation during the middle and late Holocene, and apparently, not all are purely local in character. In fact, numerous correlations with records from the adjacent South African subcontinent and the northern hemisphere testify to global climatic teleconnections. The Holocene Hypsithermal, for instance, is just as evident as the Little Ice Age (LIA and the Roman Warm Period. The marked SST-rise associated with the latter is substantiated by other marine and terrestrial data from the South African realm. The LIA (at least its early stages manifests itself in intensified winds and upwelling, which accords with increased rainfall receipts above the continental interior. It appears that climate signals are transferred both via the atmosphere and ocean. The combined analysis of SST and Tδ18O proved a useful tool in order to differentiate between both pathways. SSTs are primarily controlled by the intensity of atmospheric circulation features, reflecting changes of upwelling-favourable winds. Tδ18O records the temperature of the source water and often correlates with global ocean conveyor speed due to varying inputs of warm Agulhas Water. It seems as though conveyor slowdown or

  1. Contribuição ao estudo das fontes arteriais do encéfalo: arterjografia toracocervical mediante hiperpressão pulmonar

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    Oswaldo Ricciardi-Cruz

    1963-12-01

    Full Text Available Êste trabalho versa sôbre a visibilização das fontes arteriais do encéfalo mediante injeção de substância radiopaca por via carotídea, graças ao bloqueio circulatório resultante do aumento da pressão intrapulmonar. São consideradas fontes arteriais encefálicas as carótidas comuns, as artérias vertebrais, o tronco braquiocefálico e os segmentos pré-vertebrais das artérias subclávias. A punção arterial, transcutânea, é feita em uma das carótidas comuns ou, excepcionalmente, no tronco braquiocefálico ou na artéria subclávia (segmento pré-vertebral. Para aumentar a pressão intrapulmonar, o pulmão do paciente é insuflado com oxigênio através da sonda traqueal munida de "cuff". Uma válvula, colocada entre a fonte de oxigênio e a sonda traqueal, permite controlar a pressão intrapulmonar, que não deve exceder a 75 mm Hg. A injeção de substância contrastante é feita em 2 a 3 segundos e deve ser iniciada assim que a pressão intrapulmonar atinge o valor de 75 mm Hg, prèviamente fixado na válvula. A compressão digital da carótida a jusante do ponto de inserção da agulha tem sido recurso complementar eficiente, proporcionando visibilização de tôdas as artérias da região de modo nítido e constante. São expostos os resultados de 46 exames realizados segundo a técnica descrita. Nenhum caso de acidente foi registrado. Embora haja ainda alguns pontos obscuros e pormenores de técnica que devem ser aperfeiçoados ou modificados, a simplicidade e a segurança do método permitem situá-lo em posição vantajosa entre seus congêneres.

  2. Avaliação ultra-sonográfica dos nódulos tireóideos: comparação com exame citológico e histopatológico Ultrasonographic evaluation of thyroid nodules: comparison with cytologic and histologic diagnosis

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    Eduardo K. Tomimori

    2004-02-01

    Full Text Available O objetivo deste estudo foi avaliar a nossa classificação ultra-sonográfica dos nódulos tireóideos, baseada na ecoestrutura, ecogenicidade, calcificação, contornos e análise do restante do parênquima. De janeiro de 1998 a janeiro de 2002, 2468 pacientes portadores de nódulos tireóideos foram encaminhados ao nosso serviço para realização de ultra-sonografia e punção aspirativa por agulha fina guiada pelo ultra-som (US-PAAF. De 1039 nódulos considerados benignos ao ultra-som, 998 (96,05% também apresentaram citologia benigna, 37 (3,6% tiveram citologia suspeita e somente 4 (0,4% tiveram citologia maligna. De 153 nódulos considerados suspeitos ao ultra-som, 20 (13,1% tiveram citologia suspeita e 88 (57,5% tiveram citologia maligna. Dos 71 nódulos suspeitos ao ultra-som submetidos à cirurgia, 67 (94,3% tiveram diagnóstico anatomopatológico maligno. Já, dos 58 nódulos considerados benignos, 56 (96,6% tiveram diagnóstico anatomopatológico benigno. Concluímos que a US-PAAF deve ser realizada em nódulos classificados como indeterminados ou suspeitos ao ultra-som. Nódulos classificados como benignos podem ser acompanhados periodicamente.The purpose of this study was to evaluate our ultrasonographic classification of thyroid nodules, based on echo structure, echogenicity, calcification, margin and analysis of the surrounding parenchyma. From January 1998 to January 2002, 2,468 consecutive patients with thyroid nodules were referred for thyroid ultrasonography and ultrasound-guided fine needle aspiration biopsy (USFNAB in our Thyroid Unit. Among 1,039 nodules classified as benign on ultrasound, 998 (96.1% were also benign on cytology, 37 (3.6% were suspicious and only 4 (0.4% were malignant. On the other hand, among 153 nodules classified as suspicious on ultrasound, 20 (13.1% were suspicious and 88 (57,5% were malignant on cytology. Of the 71 nodules suspicious on ultrasound submitted to surgery, 67 (94.3% were malignant and

  3. Agressividade de linhagens de Xanthomonas axonopodis pv. aurantifolii Tipo C em lima ácida 'Galego' Aggressiveness of Xanthomonas axonopodis pv. aurantifolii Type C strains in 'Mexican' Lime

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    Letícia A. S. Nociti

    2006-04-01

    Full Text Available O presente trabalho objetivou gerar informações referentes à agressividade de linhagens de Xanthomonas axonopodis pv. aurantifolii Tipo C(Xaa-C, produtoras (PP e não produtoras de pigmento (NP escuro em meio de cultura, comparativamente a X. axonopodis pv. citri Tipo A (Xac . Os tratamentos foram formados por 14 linhagens, sendo sete de Xaa-C PP, cinco Xaa-C NP, e duas linhagens de Xac. As linhagens foram inoculadas através de ferimentos, em folhas de lima ácida 'Galego' (Citrus aurantifolia Swingle, com agulha previamente mergulhada em uma suspensão de células bacterianas (10(7 UFC/mL. Foram realizadas dez repetições para cada tratamento, representadas por uma planta cada. As plantas foram mantidas em casa de vegetação durante todo o experimento. As linhagens diferiram entre si quanto ao período de incubação, diâmetro e populações bacterianas das lesões e, comparativamente, Xaa-C NP mostraram-se mais agressivas do que Xaa-C PP. Algumas linhagens induziram sintomas que diferiram quanto à presença e extensão de anasarca, halo amarelo e saliência do tecido necrosado.The purpose of this research was to provide the information about the aggressiveness of strains of Xanthomonas axonopodis pv. aurantifolii - strains C (Xaa-C, producer (PP or not of dark pigment (NP in culture medium in comparison with X. axonopodis pv. citri - strains A (Xac. A total of 14 strains were inoculated by needle wounds in 'Mexican' Lime (Citrus aurantifolia leaves, with bacterial cell suspension (10(7 CFU/mL: seven were Xaa-C PP, five were not producers and two were Xac strains. Ten replications of one plant each were used in each treatment. The plants were kept in greenhouse during the experiment. The strains differed on incubation period, lesion size and population growth. Xaa NP was more aggressive than PP. Symptoms induced by some strains varied in terms of water-soaked, chlorotic halos and necrosis.

  4. Níveis de concentrado na dieta de novilhos F1 Limousin x Nelore: características de carcaça

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    Gesualdi Júnior Antonio

    2000-01-01

    Full Text Available Utilizaram-se 45 bovinos F1 Limousin x Nelore, não-castrados, com 14 meses de idade e peso vivo médio inicial de 330 kg, para avaliar os efeitos de diferentes níveis de concentrado (25,0; 37,5; 50,0; 62,5; e 75,0% e dois métodos de balanceamento de rações (um deles tendendo a ser isoprotéico e outro variando proteína com energia da dieta sobre o rendimento de carcaça em relação ao peso vivo (RCPV e peso corporal vazio (RCPVZ, o rendimento dos cortes básicos: ponta de agulha, acém, paleta, coxão e alcatra completa, a área de olho de lombo, o comprimento de carcaça, as porcentagens de músculo, gordura e osso (OSS e as quantidades de músculo, gordura (GORC e ossos na carcaça. Cinco animais foram abatidos no início do experimento, como referência, para estimar o peso de corpo vazio inicial dos animais que permaneceram no confinamento. Os animais receberam alimentação ad libitum até atingirem o peso de abate de 500 kg. Foi utilizado o feno de capim-coastcross como fonte de volumoso na dieta. O delineamento foi o inteiramente casualizado em esquema fatorial 5 x 2, com quatro repetições. As formas de balanceamento de rações somente influenciaram o RCPVZ. Os RCPV e a GORC elevaram-se e a OSS decresceu linearmente, à medida que se elevou o nível de concentrado na dieta. Não foi observada resposta para os rendimentos de cortes básicos da carcaça, em função dos níveis de concentrado na dieta. As demais características não foram influenciadas pelo nível de concentrado ou pela forma de balanceamento da dieta.

  5. Using of thorium isotopes to study marine particles in the Southern Ocean, the Barents and the the Mediterranean sea

    International Nuclear Information System (INIS)

    This work is based on thorium (Th) isotopes to quantify the particles fluxes and exchange between dissolved and particulate phase in three distinct environments. In the shelf region of the Barents Sea, the 234Th fluxes in the water column suggest that the sediment traps have a good catchment efficiency. To estimate the export of Particulate Organic Carbon (POC), we need to use a POC/234Th ratio. It is 10 times lower in the large trapped particles than in the suspended particles. This is due to a preferential remineralisation of POC vs 234Th and also to a large quantity of fecal pellets in traps. These results show us the importance of the large particles in the vertical fluxes and suggest that data estimated in previous studies based on the composition of suspended particles in other Arctic regions have been overestimated. In the Indian sector of the Southern Ocean, the export of POC is higher in the Polar Front Zone (PFZ). The 230Th profiles in the water column indicate a rapid renewal rate of deep water (1-15 y) by the North Atlantic Deep Water (NADW) and the Antarctic Bottom Water (AABW) in the site of study. From 234Th-230Th coupling, we are able to constrain the dynamic processes of marine particles in the upper layer. The results suggest that the settling speed of the filtered large particles are lower in the north of the Agulhas Front (AF). Moreover, we note that the desorption and the disaggregation are higher. This could be explained by the presence of detrital organic matter and/or an efficient microbial loop limiting the export of organic matter to the deep layers. In the Mediterranean studies, we have used 232Th and 230Th to estimate the degradation of large marine particles during in vitro experiments. This results suggests that the aggregation of filtered large particles requires to take into account in the particles dynamic models. 230Th-232Th budget of the western Mediterranean Sea indicates that the refractory elements fluxes are dominated by the

  6. Caracterização morfológica de nanomembranas de poliamida-66 dopadas com grafeno obtidas por electrospinning Morphological characterization of polyamide-66 nanomembranes with graphene obtained by electrospinning

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    José de Ávila Júnior

    2013-01-01

    Full Text Available Neste estudo, investigou-se a síntese de nanomembranas por eletrofiação (electrospinning. A poliamida-66 (PA-66 foi usada para estudar a influência dos parâmetros operacionais (concentração do polímero, diferença de potencial elétrico aplicada, vazão da solução, distância entre ponta da agulha e o coletor na morfologia das nanofibras. Também foi estudado o efeito da adição de nanofolhas de grafeno na morfologia das nanofibras. Os resultados demonstraram que o diâmetro médio das nanofibras é diretamente proporcional à vazão, à concentração do polímero e à diferença de potencial elétrico aplicada. A adição de nanopartículas de base carbono fez com que o diâmetro médio das nanofibras aumentasse. Os diâmetros médios para as concentrações de grafeno de 0%, 1%, e 2% variaram de 57 nm (0% até 141 nm (2%. No entanto, é importante salientar que os diâmetros médios das nanofibras obtidas estão 37% menores que aqueles reportados na literatura.This paper reports on the synthesis of polymeric nanomembranes produced by electrospinning. Polyamide-66 (PA-66 was used for studying the influence of fabrication parameters (polymer concentration, applied tension, solution flow rate, gap between needle and target on the morphology of the nanofibers. Also investigated was the effect from adding graphene into the nanofiber. The average diameter was directly proportional to polymeric concentration, flow rate, and applied tension. The addition of graphene led to an increase in the average diameter, which ranged from 57 nm for the fibers in absence of graphene to 141 nm for a 2 wt% of graphene added. It should be stressed, however, that the average diameters were 37% smaller than the values reported in the literature.

  7. Influência da suplementação com Concentrados nas características de carcaça de bovinos F1 Limousin - Nelore, não-castrados, durante a seca, em pastagens de Brachiaria decumbens

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    Santos Eduardo Destéfani Guimarães

    2002-01-01

    Full Text Available Este trabalho foi realizado na Fazenda Experimental de Felixlândia (MG, da EPAMIG, no período de julho a outubro de 1997, com o objetivo de estudar a influência da suplementação com concentrados sobre as características físicas e o rendimento dos cortes da carcaça em 20 novilhos Limousin-Nelore, não-castrados, com 22-23 meses de idade e peso médio de 459 kg ao abate. Retiraram-se, aleatoriamente, quatro animais de cada um dos cinco tratamentos a que foram submetidos durante 112 dias na época seca, em pastagens diferidas de Brachiaria decumbens. No tratamento T1 (referência, os animais nas pastagens receberam apenas sal mineralizado; nos tratamentos T2 (75% milho, T3 (50% milho, T4 (25% milho e T5 (farelo de trigo, foram fornecidas quantidades médias diárias por animal de 3,70 kg de MS de concentrados (equivalente, em matéria natural, a 1% do PV com 24,1% de PB e NDT variando de 67,8% (T5 - farelo de trigo a 85,6% (T2 - 75% milho. Avaliaram-se as características peso, rendimento e comprimento de carcaça, rendimentos de paleta, acém completo, ponta de agulha, alcatra completa e coxão, espessura de gordura subcutânea, área de olho de lombo, porcentagens na carcaça de tecido adiposo, músculos e ossos e a relação músculo/osso. O fornecimento de suplementos proporcionou a obtenção de carcaças mais pesadas (257,0 vs. 203,9 kg, com menor proporção de ossos (15,76 vs. 21,71%, maior relação músculo:osso (3,6 vs. 2,9 e melhor acabamento quando comparado às carcaças dos animais não-suplementados. Os animais suplementados e não-suplementados não diferiram em relação a rendimento e comprimento de carcaça, rendimentos de paleta, acém completo, alcatra completa e coxão, área de olho de lombo (AOL e porcentagem de músculos na carcaça.

  8. Molecular Distribution of Particulate Carbohydrates In Marine Waters

    Science.gov (United States)

    Panagiotopoulos, C.; Lafont, R.; Sempéré, R.

    Particulate samples were collected by using floating sediment traps (50-300 m) and in situ pumps (30 and 200 m) collected in the southern Indian Ocean, Mediterranean Sea and Atlantic Ocean. They were studied for monosaccharide composition after acid hydrolysis (HCl 0.09 M, 20 h, 100 °C) by using High Performance Anion Exchange Chromatography followed by Pulsed Amperometric Detection (HPAEC- PAD) (1). The initial chemical composition of particles greatly varied between the Subtropical Zone (SZ), the Polar Front Zone (PFZ) and the Agulhas Front Zone (AFZ) with sugars being more abundant in SZ (5-20 % of POC) than in PFZ (5-8 % of POC) and AFZ (4-5 % of POC). Similar contributions were also found for Atlantic Ocean particles (3-5% of POC) whereas in Mediterranean particles total aldoses represented 7-12% of POC. Ribose was the most abundant aldose in PFZ and AFZ in all samples and contributed 20-36 % of total monosaccharides followed by galactose (15-26 %) or glucose (15-16 %) (2). In SZ, glucose was the dominant aldose (38-54 %) followed by galactose (13-21 %) and xylose (9-13%). Mediterranean and Atlantic Ocean samples were characterized by a predominance of glucose (23-59 %) followed by galactose (8-35%) and ribose (3-17 %). Total carbohydrate (TCHO) fluxes were in same order of magnitude for all the study areas including Mediterranean Sea (0.12-1.36 mg m-2 d-1), Southern Indian Ocean (0.18- 0.42 mg m-2 d-1) and Atlantic Ocean (0.27-0.37 mg m-2 d-1). Particles collected from AFZ and PFZ were distinguishable in term of mannose and (arabinose+galactose) relative abundances which may suggest different organic matter origine. Experimental studies performed with large particles (fucose+rhamnose increased indicating that deoxysugars are better preserved during organic matter decomposition. (1) Panagiotopoulos, C., Sempéré, R., Lafont, R., Kerhervé, P., 2001. Sub-ambient temperature effects on separation of monosaccharides by HPAEC-PAD. Application to marine chemistry

  9. Caracterização morfológica de nanomembranas de poliamida-66 dopadas com grafeno obtidas por electrospinning Morphological characterization of polyamide-66 nanomembranes with graphene obtained by electrospinning

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    José de Ávila Júnior

    2012-01-01

    Full Text Available Neste estudo, investigou-se a síntese de nanomembranas por eletrofiação (electrospinning. A poliamida-66 (PA-66 foi usada para estudar a influência dos parâmetros operacionais (concentração do polímero, diferença de potencial elétrico aplicada, vazão da solução, distância entre ponta da agulha e o coletor na morfologia das nanofibras. Também foi estudado o efeito da adição de nanofolhas de grafeno na morfologia das nanofibras. Os resultados demonstraram que o diâmetro médio das nanofibras é diretamente proporcional à vazão, à concentração do polímero e à diferença de potencial elétrico aplicada. A adição de nanopartículas de base carbono fez com que o diâmetro médio das nanofibras aumentasse. Os diâmetros médios para as concentrações de grafeno de 0%, 1%, e 2% variaram de 57 nm (0% até 141 nm (2%. No entanto, é importante salientar que os diâmetros médios das nanofibras obtidas estão 37% menores que aqueles reportados na literatura.This paper reports on the synthesis of polymeric nanomembranes produced by electrospinning. Polyamide-66 (PA-66 was used for studying the influence of fabrication parameters (polymer concentration, applied tension, solution flow rate, gap between needle and target on the morphology of the nanofibers. Also investigated was the effect from adding graphene into the nanofiber. The average diameter was directly proportional to polymeric concentration, flow rate, and applied tension. The addition of graphene led to an increase in the average diameter, which ranged from 57 nm for the fibers in absence of graphene to 141 nm for a 2 wt% of graphene added. It should be stressed, however, that the average diameters were 37% smaller than the values reported in the literature.

  10. Investigação de acidentes biológicos entre profissionais de saúde Investigación de accidentes biológicos entre los trabajadores de la salud Investigation of biological accidents among health care workers

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    Juliana Azevedo da Silva

    2009-09-01

    Full Text Available Os objetivos deste trabalho foram identificar a principal categoria profissional exposta a risco biológico e os principais tipos de acidentes ocorridos entre trabalhadores da área de saúde, em Campos dos Goytacazes, RJ. A partir da análise das fichas de notificação de acidentes biológicos dos 183 profissionais acidentados entre janeiro de 2005 e setembro de 2005, observamos que a categoria profissional mais exposta foi a dos auxiliares/técnicos de enfermagem (54,1%, seguida pela dos acadêmicos de medicina e odontologia (10,4%. A ocorrência de acidentes com materiais perfurocortantes foi relacionada à manipulação frequente desses objetos e ao comportamento dos profissionais que utilizam práticas que oferecem riscos de acidentes com agulhas, tais como o descarte inadequado de objetos perfurocortantes.El objetivo de este estudio fue identificar las principales categorías profesional expuestas a riesgos biológicos y el principal tipo de accidentes producidos entre los profesionales del área de la salud en Campos dos Goytacazes, RJ. Del análisis de 183 archivos de los trabajadores que sufren accidentes con material biológico, de enero a septiembre de 2005, se observó que la categoría profesional más expuesta a sufrir accidentes fue el de los auxiliares de enfermería (54,1%, seguido por los estudiantes de odontología y medicina (10,4%. La de accidentes se relacionó con la manipulación frecuente de agujas, y con el comportamiento de los trabajadores, que mantienen prácticas que ofrecen riesgos, como la eliminación inadecuada de agujas.The aims of this study were to identify the major professional category exposed to biological risk and the principal type of accident occurred among health care workers in Campos dos Goytacazes, RJ. Based on the analysis of 183 records filled out by the workers who suffered biohazardous accidents between January 2005 and September 2005, we found the nursing auxiliaries and technicians as the

  11. Tétano em bovinos no sul do Rio Grande do Sul: estudo de 24 surtos

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    Pedro S. Quevedo

    2011-12-01

    Full Text Available São descritos vinte e quatro surtos de tétano ocorridos no ano 2009 em bovinos de corte em propriedades situadas na região de influência do Laboratório Regional de Diagnóstico (LRD, sul do Rio Grande de Sul. Todos os rebanhos foram submetidos a procedimentos de vacinação e/ou aplicação de anti-helmíntico entre 8 e 25 dias antes do aparecimento dos primeiros sinais clínicos. O tempo de evolução variou de 12 horas até quatro dias. Os sinais clínicos observados foram: prolapso da terceira pálpebra, andar rígido, dificuldade de flexão dos membros e permanência em decúbito lateral com os membros estendidos e afastados do solo (paralisia espástica, pálpebras muito abertas, sialorréia, hiperexcitabilidade, orelhas eretas, trismo mandibular, acúmulo de alimento na cavidade oral e presença de espuma na boca e narinas em alguns casos. Alguns bovinos apresentavam área de necrose e edema hemorrágico circundada por exsudato purulento nos músculos onde havia sido aplicado algum medicamento. O soro sanguíneo e fragmentos de músculo com lesão de animais afetados foram coletados para posterior inoculação em camundongos. No exame histopatológico não foram evidenciadas alterações. O quadro clínico associado aos dados epidemiológicos e a ausência de lesões histológicas permitiram o diagnóstico de tétano. A infecção, provavelmente ocorreu durante o procedimento de vacinação, através injeções intramusculares utilizando agulhas contaminadas. Apesar do tétano não ser uma clostridiose importante na região fica evidenciado que surtos podem ocorrer em função de condições epidemiológicas adequadas e cuidados devem ser tomados para evitar perdas econômicas importantes como as que ocorreram no ano 2009 na região.

  12. Desenvolvimento de circuito eletrônico comparador para controle de válvulas de vazões reduzidas = Development of comparative electronic circuit for reduced flow valve control

    Directory of Open Access Journals (Sweden)

    Ana Maria Frattini Fileti

    2011-04-01

    Full Text Available Diversos tipos de válvula de controle de vazão estão disponíveiscomercialmente, sendo a maioria delas apropriada para elevadas vazões e provida de acionamento pneumático para reduzir riscos de explosões em ambientes industriais. As válvulas para vazões reduzidas e baixas pressões são de pequenas dimensões, normalmente eletrônicas e apresentam custo elevado. No presente trabalho foi desenvolvido um sistema de controle eletrônico de vazão por computador on-line, baseado em componentes eletrônicos comuns, em esquema comparativo de tensão. Um amplificador subtrador foi utilizado neste circuito eletrônico, comparando dois valores de tensão para o controle dosentido de rotação e parada do motorredutor de velocidade acoplado à haste da válvula agulha comum. Este sistema de baixo custo se mostrou eficiente e de simples montagem eletrônica. Válvulas de diferentes dimensões foram acopladas com sucesso ao motorredutor comandado pelo circuito eletrônico, conferindo flexibilidade ao atuador desenvolvido.Ensaios de calibração e de determinação de tempo morto são apresentados, obtendo-se como menor faixa de vazão os valores de 0,3 a 3,6 mL s-1.Different types of flow control valves are commercially available but most are only adequate for high flow rates. These are provided with pneumatic devices to reduce explosion risks in industrial plants. Flow-reduced and low pressure valves are small sized, usually driven by analogical signals and very expensive. Current assay developed an on-line computer-aided flow control electronic system made up of common electronic components within a comparative voltage scheme. A subtracted amplifier was employed in the electronic circuit which compares two voltages for rotation direction control and stoppage of speed engine reducer linked to the common valve stem. This low cost system is very efficient and has the advantage of being electronically assembled without any difficulty. Different

  13. Carbonate system in the water masses of the Southeast Atlantic sector of the Southern Ocean during February and March 2008

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    M. González-Dávila

    2011-05-01

    Full Text Available Carbonate system variables were measured in the South Atlantic sector of the Southern Ocean along a transect from South Africa to the southern limit of the Antarctic Circumpolar Current (ACC from February to March 2008. Eddies detached from the retroflection of the Agulhas Current increased the gradients observed along the fronts. Minima in the fugacity of CO2, fCO2, and maxima in pH on either side of the frontal zone were observed, noting that within the frontal zone fCO2 reached maximum values and pH was at a minimum.

    Vertical distributions of water masses were described by their carbonate system properties and their relationship to CFC concentrations. Upper Circumpolar Deep Water (UCDW and Lower Circumpolar Deep Water (LCDW offered pHT,25 values of 7.56 and 7.61, respectively. The UCDW also had higher concentrations of CFC-12 (>0.2 pmol kg−1 as compared to deeper waters, revealing that UCDW was mixed with recently ventilated waters. Calcite and aragonite saturation states (Ω were also affected by the presence of these two water masses with high carbonate concentrations. The aragonite saturation horizon was observed at 1000 m in the subtropical area and north of the Subantarctic Front. At the position of the Polar Front, and under the influence of UCDW and LCDW, the aragonite saturation horizon deepened from 800 m to 1500 m at 50.37° S, and reached 700 m south of 57.5° S. High latitudes proved to be the most sensitive areas to predicted anthropogenic carbon increase. Buffer coefficients related to changes in [CO2], [H+] and Ω with changes in dissolved inorganic carbon (CT and total alkalinity (AT offered minima values in the Antarctic Intermediate Water and UCDW layers. These coefficients suggest that a small increase in CT will sharply decrease the status of pH and carbonate saturation

  14. Tampão peridural com dextran 40 na profilaxia da cefaléia pós-punção acidental da duramáter em paciente HIV positivo: relato de caso Tampón peridural con dextran 40 en la profilaxia de la cefalea pós-punción accidental de la duramáter en paciente SIDA positivo: relato de caso Epidural patch with dextran 40 to prevent postdural puncture headache in an HIV patient: case report

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    Marcos Guilherme Cunha Cruvinel

    2002-11-01

    Full Text Available JUSTIFICATIVA E OBJETIVOS: A cefaléia pós-punção de duramáter é uma complicação bem conhecida das anestesias subaracnóideas e peridurais, sendo o tampão sangüíneo considerado o tratamento mais eficaz, até o momento. Este é um procedimento invasivo e sujeito a complicações graves. Seu uso em certos pacientes, como portadores de HIV ou leucemias, é motivo de debate. Várias alternativas têm sido relatadas. O objetivo deste artigo é apresentar um caso do uso do tampão peridural com dextran 40 na profilaxia da cefaléia pós-punção de duramáter em paciente portador do vírus da imunodeficiência humana (HIV, com história de cefaléia em anestesia subaracnóidea anterior. RELATO DE CASO: Paciente masculino, 31 anos, 70 kg, estado físico ASA II, portador de HIV, para tratamento de condilomatose anal recidivada, com relato de cefaléia intensa e limitante durante duas semanas após anestesia subaracnóidea (agulha Quincke 25G. Durante tentativa de anestesia peridural com agulha de Tuohy 18G em L3-L4, houve perfuração acidental da duramáter. Foram injetados, por duas vezes, 20 ml de dextran 40 a 10% por cateter peridural; a primeira, 150 minutos após a administração dos anestésicos e a segunda na manhã seguinte à cirurgia. O paciente evoluiu assintomático e recebeu alta no dia seguinte à sua internação. CONCLUSÕES: O uso do tampão com soluções colóides como o dextran 40 não está bem estabelecido, porém existem alguns relatos do seu uso com sucesso e entendemos que seu potencial deva ser melhor explorado.JUSTIFICATIVA Y OBJETIVOS: La cefalea pós-punción de duramáter es una complicación bien conocida de las anestesias subaracnóideas y peridurales, siendo el tampón sanguíneo considerado el tratamiento más eficaz hasta el momento. Este es un procedimiento invasivo y sujeto a complicaciones graves. Su uso en ciertos pacientes, como portadores de SIDA o leucemias, es motivo de debate. Varias alternativas

  15. Prevalência de marcadores do vírus da hepatite B em crianças de 3 a 9 anos em um município da Amazônia brasileira Prevalence of hepatitis B viral markers in children 3 to 9 years old in a town in the Brazilian Amazon

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    Sandra Breder Assis

    2004-01-01

    Full Text Available OBJETIVO: Estimar a prevalência da infecção pelo vírus da hepatite B e identificar as possíveis vias de infecção em crianças de 3 a 9 anos em um município da Amazônia brasileira. MÉTODOS: Foi realizado um estudo transversal com 487 crianças matriculadas em creches e escolas públicas. Foram obtidos dados acerca de migração, história médica, exposição a fatores de risco clássicos para infecção, aspectos socioeconômicos e hábito de compartilhar a cama ou objetos de uso pessoal. Também foi investigada a presença no domicílio de morador com doença sexualmente transmissível, usuário de drogas injetáveis, dependente de bebida alcoólica, homens que faziam sexo com outro homem e pessoa com múltiplos parceiros sexuais, além de história de icterícia ou hepatite e de transfusão de hemoderivados. Foram obtidas amostras de sangue das crianças para pesquisa de marcadores virais. RESULTADOS: A prevalência de marcadores do vírus da hepatite B foi de 11,1% (54 crianças. Seis crianças (1,2% eram portadoras do HBsAg. Não houve associação entre marcadores virais e condições econômicas, escolaridade dos pais, condições higiênico-sanitárias, número de cômodos do domicílio, história prévia de icterícia ou hepatite, tratamento dentário, acidente com seringas e agulhas, reutilização de agulhas, transfusão de hemoderivados e hábito de compartilhar a cama ou objetos pessoais. Porém, as crianças que tiveram contato com usuário pesado de bebida alcoólica tenderam à maior prevalência de marcadores virais (P= 0,06. Dentre as crianças estudadas, 53 (10,9% haviam sido vacinadas contra a hepatite B, mas nenhuma havia completado o esquema vacinal de três doses. Na regressão logística, as variáveis "história de icterícia materna durante a gravidez," "mais de oito moradores no domicílio" e "profissão da mãe" mostraram associação com maior prevalência de marcadores virais. CONCLUSÃO: A população de

  16. Delay factors on the administration of thrombolytic therapy in patients diagnosed with acute myocardial infarction in a general hospital Factores que atrasan la administración de trombolítico en pacientes con diagnóstico de infarto agudo del miocardio atendidos en un hospital general Fatores que retardam a administração de trombolítico em pacientes com diagnóstico de infarto agudo do miocárdio atendidos em um hospital geral

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    Luis Antônio Muller

    2008-02-01

    : intervalo entre la entrada del paciente al hospital y la administración del trombolítico. No hubo diferencia significativa entre el tiempo de ingreso al hospital y los medios de transporte utilizados. Los pacientes atendidos por un médico cardiólogo y durante el turno de la noche tuvieron una reducción en el tiempo porta aguja, respectivamente, de (P=0,014 y (P=0,034. CONCLUSIONES: Los resultados del estudio demuestran que la demora en el ingreso al servicio médico, el tiempo porta electrocardiograma y el tiempo para diagnosticar el IAM, fueron los factores que determinaron el retardo de la administración del trombolítico.OBJETIVO: Identificar fatores que retardam o início da trombólise em pacientes com IAM. MÉTODOS: Estudo de coorte , com 146 pacientes, com diagnóstico de IAM submetidos à terapêutica trombolítica. Os dados foram extraídos de prontuários, entre janeiro de 2002 e dezembro de 2004. RESULTADOS: A média de idade foi de 57,5 ± 9 anos, 64% sexo masculino. O tempo médio entre o início da dor e a chegada ao hospital foi de 254,7 ± 126,6 minutos, 28% utilizaram a ambulância para o deslocamento, o tempo porta-eletrocardiograma médio de 19,4 ± 7,3 minutos e tempo porta-agulha de 51,1 ± 14,9 minutos. Não houve diferença significativa entre o tempo de apresentação ao hospital e o meio de transporte utilizado. Os pacientes atendidos por cardiologistas e no turno da noite tiveram uma redução no tempo porta-agulha, respectivamente (P=0,014 e (P=0,034. CONCLUSÕES: Os resultados do estudo demonstram que a demora na chegada ao serviço médico, tempo porta-eletrocardiograma e tempo para diagnosticar o IAM, foram os fatores envolvidos no retardo da administração de trombolítico.

  17. Simulação de bloqueios periféricos guiados por ultra-som: curva de aprendizado dos residentes de anestesiologia do CET-SMA/HSL Simulacro de bloqueos periféricos guiados por ultrasonido: curva de aprendizaje de los residentes de anestesiología del CET-SMA/HSL Simulation of ultrasound-guided peripheral nerve block: learning curve of CET-SMA/HSL anesthesiology residents

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    Marilia Bonifácio Baranauskas

    2008-04-01

    Full Text Available JUSTIFICATIVA E OBJETIVOS: A técnica de ultra-som tem sido cada vez mais utilizada para a realização de bloqueios de nervos periféricos. Existem poucos relatos na literatura que analisam a curva de aprendizado da técnica de ultra-som. O objetivo do estudo foi avaliar a curva de aprendizado dos residentes de Anestesiologia do CET-SMA/HSL em bloqueios periféricos guiados por ultra-som por meio de modelo experimental de gelatina. MÉTODO: Foi desenvolvido modelo experimental com cuba preenchida de gelatina e azeitona submersa. Nove residentes foram distribuídos aleatoriamente em três grupos (G1, G2 e G3 compostos, cada um, de um R1, um R2 e um R3. Os três grupos receberam explanação teórica. O G1 recebeu duas horas de treinamento prático, o G2 uma hora e o G3 não treinou. Na seqüência, os participantes foram solicitados a posicionar a agulha no ponto médio da parede da azeitona, próximo ao transdutor e reposicionar a agulha entre a azeitona e o fundo da cuba, simulando a injeção perineural do anestésico. Foram avaliadas a velocidade e eficácia das tarefas, além das falhas técnicas. RESULTADOS: O G1 apresentou média de tempo para realização das tarefas de 37,63 segundos, sem falhas técnicas; no G2 observou-se média de 64,40 segundos, ocorrendo duas falhas técnicas e o G3 apresentou média de 93,83 segundos, com 12 falhas técnicas. CONCLUSÕES: O estudo permite concluir que o maior tempo de treinamento em modelo experimental de bloqueios periféricos guiados por ultra-som melhorou a curva de aprendizado na simulação da técnica.JUSTIFICATIVA Y OBJETIVOS: La técnica de ultrasonido ha sido cada vez más utilizada para la realización de bloqueos de nervios periféricos. Existen pocos relatos en la literatura que analizan la curva de aprendizaje de la técnica de ultrasonido. El objetivo del estudio fue evaluar la curva de aprendizaje de los residentes de Anestesiología del CET-SMA/HSL en bloqueos periféricos guiados

  18. Autoimmune pancreatitis. An update; Autoimmunpankreatitis. Ein Update

    Energy Technology Data Exchange (ETDEWEB)

    Helmberger, T. [Klinikum Bogenhausen, Staedt. Klinikum, Institut fuer Diagnostische und Interventionelle Radiologie, Neuroradiologie und Nuklearmedizin, Muenchen (Germany)

    2016-04-15

    Autoimmune pancreatitis (AIP) is a rare disease, the pathophysiological understanding of which has been greatly improved over the last years. The most common form, type 1 AIP belongs to the IgG4-related diseases and must be distinguished from type 2 AIP, which is a much rarer entity associated with chronic inflammatory bowel disease. Clinically, there is an overlap with pancreatic cancer. Imaging and further criteria, such as serological and histological parameters are utilized for a differentiation between both entities in order to select the appropriate therapy and to avoid the small but ultimately unnecessary number of pancreatectomies. The diagnostics of AIP are complex, whereby the consensus criteria of the International Association of Pancreatology have become accepted as the parameters for discrimination. These encompass five cardinal criteria and one therapeutic criterion. By applying these criteria AIP can be diagnosed with a sensitivity of 84.9 %, a specificity of 100 % and an accuracy of 93.8 %. The diagnosis of AIP is accomplished by applying several parameters of which two relate to imaging. As for the routine diagnostics of the pancreas these are ultrasound, computed tomography (CT) and magnetic resonance imaging (MRI). Important for the differential diagnosis is the exclusion of signs of local and remote tumor spread for which CT and MRI are established. The essential diagnostic parameter of histology necessitates sufficient sample material, which cannot usually be acquired by a fine needle biopsy. CT or MRI are the reference standard methods for identification of the optimal puncture site and imaging-assisted (TruCut) biopsy. In patients presenting with unspecific upper abdominal pain, painless jaundice combined with the suspicion of a pancreatic malignancy in imaging but a mismatch of secondary signs of malignancy, AIP should also be considered as a differential diagnosis. As the diagnosis of AIP only partially relies on imaging radiologists also

  19. Guide for the realization of core needle biopsy through stereotaxy in the diagnosis of suspicious breast lesions of malignity

    International Nuclear Information System (INIS)

    Guides have been made for the realization of breast biopsies through stereotaxy in the management of breast lesions. The type of injuries that have been detected in mammography services, most have corresponded to nonpalpable lesions, that should be clarified through the take samples for an histological study with the purpose of categorize them. A bibliographic review was realized of the findings most frequent in the breast pathology. Also, before a nonpalpable breast lesion that requires a diagnosis biopsy, should be assessed the method of suitable guide for to access the same. The interventionist procedures of the breast have been developed in last years and have been guided by stereotaxy, in order to preoperative localization of these lesions or for obtaining valid cytologic-histologic material to reach a diagnosis, as it has often been difficult to differentiate, just for the image, between benign and malignant lesions. Thus, has emerged the necessity to guide the needle tip objectifying the lesion through mammography. A localization system based on triangulation is applied. The location of the lesion is calculated in the three axes of space (X, Y and Z) with a minimum error. The stereotactic devices have created to guide needles to injuries from a unique projection. This has allowed that breast and lesion are subject on a site while have taken samples several times. The complete mammography study that include the projections craniocaudal (CC) and mediolateral oblique (MLO) are analyzed to find out exactly on which quadrant has found the injury. Sometimes, the injury only has observed in a unique projection which is used for locating. The two main devices that have been used to perform stereotactic biopsy are automatic gun of biopsy and vacuum-assisted directional biopsy. Automatic gun of biopsy has used a long needle tru-cut type, with calibers between 18 and 14, although it is preferred 14-gauge needles. Multiple samples obtained from this needle have

  20. Is vaccination against hepatitis B a reality among Primary Health Care workers? ¿La vacunación contra hepatitis B es una realidad entre trabajadores de la Atención Primaria de Salud? A vacinação contra hepatite B é realidade entre trabalhadores da Atenção Primária à Saúde?

    Directory of Open Access Journals (Sweden)

    Fernanda Marques da Costa

    2013-02-01

    trabajador y aquellos que consumían bebidas alcohólicas. Fue mayor en aquellos con más años de educación y los que relataron contacto con instrumentos punzantes y cortantes. Se sugiere que la instabilidad en el trabajo pueda llevar a negligencia y que los comportamientos negligentes se repiten. La caracterización de los profesionales que no se vacunaron dirigirá acciones educativas, visando a la salud del trabajador.OBJETIVO: verificar a prevalência e os fatores associados à vacinação contra hepatite B entre trabalhadores da Atenção Primária à Saúde de Montes Claros, MG. MÉTODO: trata-se de estudo transversal, analítico, cujos dados foram coletados utilizando um formulário, contendo variáveis sociodemográficas, ocupacionais, de saúde geral e comportamentais. Associações foram investigadas por análises bivariadas e regressão de Poisson multivariada, empregando-se o programa SPSS 17.0. RESULTADOS: a questão sobre vacinação foi respondida por 95,5% dos trabalhadores; 47,5% não completaram o esquema vacinal. A prevalência dos vacinados foi menor entre os mais velhos, nos contratados, entre os que não participaram de atualização na área de saúde do trabalhador e naqueles que consumiam bebidas alcoólicas. Foi maior naqueles com mais anos de estudo e nos que relataram contato com instrumentos perfurocortantes. CONCLUSÕES: a formação profissional, o conhecimento e a percepção do risco de infecção são importantes na determinação da vacinação. Sugere-se que a instabilidade no trabalho pode levar à negligência e que os comportamentos negligentes se repetem. A caracterização dos profissionais que não se vacinaram direcionará ações educativas, visando a saúde do trabalhador.

  1. Prótese para substituição total de disco intervertebral: desenvolvimento de modelo computacional e análise por elementos finitos Prótese de reemplazo total del disco intervertebral: modelo de desarrollo computacional y análisis de elementos finitos Prosthesis for total intervertebral disc replacement: computacional model development and finite element analysis

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    Tiago Nunes Campello

    2009-03-01

    ón de su modelo virtual, seguido por el virtual mecánica de análisis de elementos finitos. RESULTADOS: la prótesis discal, fue diseñado con tres componentes, que son la parte superior de brida, la brida inferior y núcleo. Aplicando el criterio de von Mises solución virtual para el análisis, se constató que el núcleo de la prótesis es la más solicitada durante la compresión axial y la compresión y cortante. CONCLUSIÓN: por último, este estudio demuestra la viabilidad de elaborar un proyecto para la construcción de una prótesis para reemplazo total del disco intervertebral, a través de métodos computacionales ya consagrados en los proyectos de ingeniería mecánica, principalmente en automoción y sector aeroespacial.INTRODUCTION: the idea of an artificial intervertebral disc is not new. The studies of spinal arthroplasty prostheses are in developing, while new materials and technologies are developed to suply medical engineering projects. OBJECTIVE: to establish a methodology for product development on a project of prosthesis for total disc replacement, trough the use of computacional engineering tools. METHODS: the methodology of prosthesis development began with the definition of their virtual model, followed by the virtual mechanical analysis by finite element. RESULTS: the prosthesis is designed with three components: the top flange, bottom flange and the core. Applying the von Mises criterion for the virtual analysis solution, it was found that the core of the prosthesis is the most stressed component during axial compression and compression/shear. CONCLUSION: this study demonstrated that the development of a total disc replacement prosthesis is viable through computational methods already known in mechanical engineering projects, mainly in automotive and aeronautics.

  2. Túnel bajo el agua

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    Stamhuis, E.

    1964-03-01

    a los distintos cálculos realizados por el Instituto Central de Investigaciones Científicas de Holanda. En este trabajo se analizan los resultados obtenidos de un estudio teórico llevado a cabo por el Instituto Central de Investigaciones Científicas de Holanda sobre túneles sumergidos en el agua, con objeto de establecer normas generales para proyectar este tipo de túneles con ventajas sobre los actualmente existentes. En primer lugar se estudian la resistencia, impermeabilización y ventilación más racionales para la redacción del proyecto de ejecución. Seguidamente se analiza la forma, secciones apropiadas y métodos constructivos, comparándolos con los utilizados en la construcción de otros túneles de esta naturaleza en América. Son objeto de particular atención los procedimientos en los que la línea general constructiva se basa en la prefabricación y montaje de elementos estructurales preparados en taller, su transporte y colocación en obra. Como detalles complementarios el autor se extiende en consideraciones del juego de presiones del suelo yagua, empujes de flotación y los casos en que aparecen flexiones y esfuerzos cortantes en los distintos tramos en que se puede subdividir la longitud total del túnel. Se esfuerza el autor en dar una carácter práctico a las aplicaciones que del estudio teórico se pueden derivar para la realización de la obra. También se describen: unos pasadores especiales que sirven para solidarizar los dos tubos de que se compone el túnel; las juntas entre dos trozos distintos del mismo, su impermeabilización y la flexibilidad que con ellos se logra. Finalmente, el autor resume su exposición teórica con una serie de observaciones y consejos aplicables a estas construcciones.

  3. Geostatistical analysis of microrelief of an oxisol as a function of tillage and cumulative rainfall Análise geoestatística do microrrelevo de um Latossolo em função do preparo do solo e da precipitação acumulada

    Directory of Open Access Journals (Sweden)

    Eva Vidal Vázquez

    2009-04-01

    preparo do solo: grade de discos, arado de discos, escarificador, grade de discos + grade niveladora, arado de discos + grade niveladora e escarificador + grade niveladora. As medidas foram feitas logo após o preparo do solo e subseqüentemente após cumulativos eventos de chuva natural. Medições duplicadas foram feitas em cada tratamento para cada data, produzindo um total de 48 superfícies. Um rugosímetro de agulhas foi utilizado para as medidas da rugosidade da superfície. A área de cada parcela era 1,35 m por 1,35 m e as medidas espaçadas de 25 mm, produzindo um total de 3025 pontos por parcela. Antes da análise geoestatística, a tendência foi removida dos dados experimentais por dois diferentes métodos. Foram ajustados modelos aos semivariogramas de cada superfície, e os parâmetros desses modelos foram analisados. O método usado para remover a tendência influenciou os resultados geoestatísticos. O parâmetro geoestatístico razão de dependência mostrou que a dependência espacial aumentou para a maioria das superfícies com o aumento da precipitação pluvial acumulada.

  4. Beef cuts yield of steer carcasses graded according to conformation and weight Rendimento de cortes cárneos de carcaças de novilhos classificadas de acordo com a conformação e o peso de carcaça

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    Leonir Luiz Pascoal

    2010-06-01

    leves (2,30%, que não diferiram entre si. A participação relativa da ponta-de-agulha não foi afetada pela conformação, mas foi significativamente maior nas carcaças pesadas (13,93% e medianas (13,87% em relação às leves (13,07%. Os rendimentos à desossa de cortes cárneos (78,08% de osso (16,57% e retalhos (5,23% e as perdas inerentes ao processo da desossa (0,12% não foram influenciados significativamente pelo peso das carcaças. Entretanto, quando avaliadas por classes de conformação, as carcaças de melhor conformação tiveram maior rendimento de cortes cárneos (78,75 vs 77,92 e 77,29%. A conformação influencia o rendimento de cortes cárneos da carcaça de novilhos jovens, enquanto o peso da carcaça não afeta essa característica.

  5. CHARACTERISTICS OF CARCASS AND MEAT IN CASTRATED OR NON CASTRATED NELORE BREED HEIFERS CARACTERÍSTICAS DE CARCAÇA E CARNE EM NOVILHAS CASTRADAS OU NÃO-CASTRADAS DA RAÇA NELORE

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    Klaito José Gonçalves dos Santos

    2007-12-01

    (±20, entre 28 e 30 meses de idade, sendo avaliados os parâme-tros comprimento de carcaça fria, peso dos quartos trasei-ros e dianteiros, ponta-de-agulha, área de olho de lombo, espessura de gordura e maciez da carne. O anel de látex aplicado no pedículo ovariano em bezerras da raça Nelore não influenciou positivamente nas características de carcaça e de carne, com exceção da área de olho de lombo, o que foi variável favorável às bezerras não-castradas.

    Palavras-chaves: Anel de látex, bovinos, carcaça, carne, ovário.

  6. Dor abdominal aguda como manifestação de violência física em lactente: alerta aos pediatras Dolor abdominal agudo como manifestación de violencia física en lactante: alerta a los pediatras Acute abdominal pain as a manifestation of physical violence in an infant: alert to pediatricians

    Directory of Open Access Journals (Sweden)

    Patricia Gomes de Souza

    2012-12-01

    Full Text Available OBJETIVO: Alertar os pediatras e residentes de Pediatria quanto à possibilidade da ocorrência de violência contra a criança por meio do relato de um caso clínico. DESCRIÇÃO DO CASO: Paciente de 18 meses deu entrada à emergência com dor abdominal e vômitos há 48 horas. O exame abdominal revelou dois orifícios e massa pequena endurecida. O raio X de abdome mostrou imagem compatível com três objetos metálicos. Duas agulhas e um prego sem cabeça foram removidos da cavidade abdominal por meio de laparotomia. COMENTÁRIOS: O diagnóstico foi realizado no segundo atendimento médico, provavelmente por não ter sido aventada a possibilidade de lesão intencional no primeiro. A violência física é um diagnóstico diferencial a ser pensado nos quadros de dor abdominal em crianças. Ressalta-se a importância de aprimorar a formação do residente de Pediatria e dos pediatras em geral para a abordagem da violência contra a criança, de forma que estejam mais preparados para o acionamento da linha de cuidado em situações de violência.OBJETIVO: Alertar a los pediatras y médicos internos en Pediatría respecto a la posibilidad de ocurrencia de violencia contra el niño por medio del relato de un caso clínico. DESCRIPCIÓN DEL CASO: Paciente con 18 meses llevado a la emergencia por dolor abdominal y vómitos hace 48 horas. El examen abdominal reveló dos agujeros y masa pequeña endurecida. Rayo-X abdominal mostró imagen compatible con tres objetos metálicos. Dos agujas y un clavo sin cabeza fueron removidos de la cavidad abdominal mediante laparotomía. COMENTARIOS: El diagnóstico se realizó en la segunda atención médica, probablemente por no haber sido aventada la posibilidad de lesión intencional en la primera atención. La violencia física es un diagnóstico diferencial que se debe tener en cuenta en los cuadros de dolor abdominal en niños. Se subraya la importancia de perfeccionar la formación del médico interno en

  7. A influência postural do salto alto em mulheres adultas: análise por biofotogrametria computadorizada Postural influence of high heels among adult women: analysis by computerized photogrammetry

    Directory of Open Access Journals (Sweden)

    DH Iunes

    2008-12-01

    Full Text Available INTRODUÇÃO: Em nossa sociedade, temos observado uma oferta cada vez maior de modelos, cores, estilos, altura e diversos tipos de salto. OBJETIVO: Avaliar se o uso de calçados de salto alto influencia nas alterações posturais com base em um conjunto de variáveis mensuradas por meio da fotogrametria computadorizada. MÉTODOS: Vinte indivíduos que utilizam salto alto com freqüência (grupo 1 e 20 indivíduos que utilizam salto alto esporadicamente (grupo 2 foram fotografados no plano frontal anterior e sagital em três momentos: a sem utilização de calçado, b utilizando salto agulha e c utilizando salto plataforma, sendo estas fotografias aleatorizadas e analisadas por um experimentador cego por meio da fotogrametria. A análise estatística foi realizada a partir da análise de variância em esquema fatorial 2x3, ou seja, comparando-se a freqüência do uso de salto com o tipo de calçado, com 5% de significância. RESULTADOS: Apenas o ângulo protrusão da cabeça apresentou diferença quando comparados grupo 1 e 2 (pINTRODUCTION: In our society, it is observed an increasing number of models, colors, styles, heights and types of high heels. OBJECTIVE: To evaluate whether the use of high heel shoes results in postural changes, based on a set of variables measured through computerized photogrammetry. METHODS: Twenty individuals who often used high heels (group 1 and 20 individuals who only used high heels sporadically (group 2 were photographed in the frontal and sagittal planes at three conditions: a without using footwear; b using stiletto heels; and c using high platform heels. These photographs were randomized and analyzed by a blinded examiner, by means of photogrammetry. Statistical analysis was performed, using a 2x3 factorial analysis of variance to compare the frequency of high heel use with the type of shoe, at the 5% significance level. RESULTS: Only the head protrusion angle showed a difference between groups 1 and 2 (p<0

  8. Age-related ultrasonography, cytology, and microbiologic exam of canine prostate Ultrassonografia, citologia e exame microbiológico da próstata de cães em diferentes idades

    Directory of Open Access Journals (Sweden)

    C.R.F. Gadelha

    2009-12-01

    Full Text Available The physiological parameters that could be reference for trustful diagnosis and prognosis of prostate disorders in dogs were obtained. Thirty six intact male dogs without clinical signs of neither prostatic nor reproductive disorders were allocated according the age in three groups. These animals were submitted to semen manual collection for microbiological exams; transabdominal ultrasonography to evaluate dimensions, ecogenicity, and texture of prostatic parenchyma and aspirative puncture with fine needle for cytological and microbiological analyses. Ultrasonography revealed that the predominant prostatic shape was round with regular surface. Dimensions varied according to age, being small in young animals and large in old ones. There was a positive correlation between prostatic dimensions and body weight. Microbiological exams detected microorganisms on seminal plasma from 11 dogs and prostate tissue aspirated from 10 animals, although they were healthy. Cytology did not reveal any inflammatory, proliferative, or neoplasic alteration in young and middle age dogs, but in three older dogs signs of hyperplasia/hypertrophy was found. It was observed positive correlation between age and cellular area but a negative correlation was observed between nucleus:cytoplasm ratio and craniocaudal dimension.Obtiveram-se parâmetros fisiológicos que pudessem ser utilizados como referência para diagnóstico e prognóstico confiáveis de doença prostática em cães. Trinta e seis cães, sem sinais clínicos de doença prostática ou distúrbios reprodutivos, foram distribuídos em três grupos de acordo com a idade.Os animais foram submetidos à colheita manual de sêmen para exames microbiológicos, à ultrassonografia transabdominal, para avaliar as dimensões, a ecogenicidade e a ecotextura prostática, e à punção aspirativa com agulha fina, para análise citológica e microbiológica. A ultrassonografia revelou que a forma predominante da pr

  9. Accidents at work and its impact on a hospital in Northern Portugal Accidentes de trabajo y su impacto en un hospital en el norte de Portugal Acidentes de trabalho e suas repercussões num hospital ao Norte de Portugal

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    Matilde Delmina da Silva Martins

    2012-04-01

    a 2010, realizou-se este estudo transversal retrospectivo. A informação foi obtida recorrendo-se ao registro de notificação dos acidentes de trabalho, referentes a 387 trabalhadores. A maior prevalência de acidentes recaiu nos técnicos superiores de saúde (56,1%, em trabalhadores do gênero feminino (81,9%, no grupo etário entre 30 e 39 anos (37,2%, com escolaridade superior ao 12º ano (55,8%, trabalhando por turnos (72,4% e nos serviços de internamento (35,9%. A principal causa de acidentes foi a picada de agulha (45,7% e a lesão mais prevalente verificou-se nos membros superiores (43,2%. As feridas representaram o tipo de lesão mais frequente (32,6%, resultando em ausência ao trabalho (27,4%, sendo as entorses/distensões o principal motivo. Estratégias preventivas devem ser adotadas objetivando a promoção da saúde desses profissionais.

  10. Influência da região de plantio do arroz sôbre a infestação da traça dos cereais, Sitotroga cerealella (Olivier (Lepidoptera Gelechiidae Influence of the local of rice planting upon the infestation of Sitotroga cerealella (Olivier (Lepidoptera Gelechidae

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    Carlos Jorge Rossetto

    1969-01-01

    Full Text Available Procurou-se verificar a influência da região e da irrigação na cultura do arroz sôbre a suscetibilidade posterior do grão armazenado ao ataque da traça. Amostras de arroz com casca foram plantadas em quatro regiões diferentes do Estado de São Paulo, em culturas de várzea irrigada e de sequeiro. O produto, armazenado por um ano e meio em ambiente uniforme, foi submetido ao ataque da traça Sitotroga cerealella (Olivier. Foi observado que o local de cultivo do arroz influencia sua suscetibilidade à infestação da traça dos cereais durante o armazenamento. Os resultados mostraram que o arroz cultivado em sequeiro na região de Pindorama foi muito mais atacado pela traça que os cultivados nas outras regiões. O teste de Scheffé mostrou que houve um contraste significativo entre o arroz de várzea de Pindamonhangaba, Campinas e Mococa e o de sequeiro de Pindorama e Campinas, mas não houve diferença significativa entre o arroz de várzea e o de sequeiro de Campinas. O período entre a infestação do arroz em casca, em laboratório, e o início da emergência dos primeiros adultos foi de 23 dias.It was investigated whether or not the local of cultivation of rice affects the posterior susceptibility to Sitotroga cerealella of the grain in storage. Samples of rough rice from the same bulk of seeds, of the variety Dourado Agulha, were planted in four regions of the State of São Paulo, Pindamonhangaba paddy, Pindorama upland, Mococa paddy. Campinas paddy and Campinas upland. The rice, after having been harvested, was taken to Campinas where - after one year and half of storage under uniform conditions for all samples - it was tested for its susceptibility to the insect, by using samples of each local replicated 10 times randomly distributed inside of an insect cage. The progeny of insects of each sample was recorded daily. The trial was repeated twice. The results showed that the local of cultivation has influence upon the posterior

  11. Fosfitos aplicados em pós-colheita reduzem o mofo-azul em maçãs 'Fuji' e 'Gala' Postharvest application of phosphites reduces blue mold on 'Fuji' and 'Gala' apples

    Directory of Open Access Journals (Sweden)

    Luiz Eduardo Bassay Blum

    2007-08-01

    Full Text Available O mofo-azul (Penicillium expansum é uma podridão pós-colheita comum em maçãs (Malus domestica. O uso de substâncias menos ofensivas ao ambiente, como o fosfito (ácido fosforoso, é uma das alternativas de controle dessa doença. Visou-se, então, a avaliar neste estudo a eficiência de fosfito-K (40% de P2O5 e 30% de K2O e fosfito-CaB (10,7% de P2O5, 3,89% de Ca e 0,5% de B no controle do mofo-azul em maçãs 'Fuji' e 'Gala'. Os testes foram delineados em blocos ao acaso com seis repetições de 20 frutos cada. Os frutos foram desinfestados em hipoclorito de Na (1% por três minutos, lavados em água esterilizada, feridos (1mm de diâmetro e de profundidade com agulha em quatro pontos eqüidistantes, imersos nos tratamentos por 15 minutos e armazenados a 15-20ºC. Nas suspensões contaminadas com Penicillium expansum (10² conídios.mL-1, foram adicionadas as seguintes substâncias: benomil (150 mg.L-1, fosfito-K (0,5 a 1,5 mL.L-1 e fosfito-CaB (1,5 a 3,0 mL.L-1. As maçãs 'Fuji' e 'Gala' imersas em água com fosfito-CaB (1,5 mL.L-1, fosfito-K (0,5-1,5 mL.L-1 ou benomil (150 mg.L-1 foram menos afetadas pelo mofo-azul. A aplicação de fosfito-K (1,5 mL.L-1 ou benomil (150 mg.L-1 nos frutos foi mais eficiente do que os demais tratamentos no controle do mofo-azul.Blue mold (Penicillium expansum is a common postharvest disease of apples (Malus domestica. Applications of less hazardous substances to the environment, such as phosphite (phosphonic acid, is an alternative to the control of blue mold. The main goal of this study was to evaluate the efficiency of phosphite-K (40% P2O5 and 30% K2O and phosphite-CaB (10.7% P2O5, 3.89% Ca, and 0.5% B for the control of blue mold on 'Fuji' and 'Gala' apples. Tests were designed in randomized blocks with six replications of 20 fruits. Fruits were decontaminated with Na hypochlorite (1% for three minutes, washed with sterilized water, needle wounded (with a diameter and deepness of 1mm in four

  12. Behavior assessment of women attending a sexually transmitted disease clinic in Vitória, Brazil Práticas comportamentais em mulheres atendidas em clínica de doenças sexualmente transmissíveis em Vitória, Brasil

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    Angelica Espinosa Miranda

    2012-04-01

    menos comuns (55%. Mulheres HIV-positivas pediram a seus parceiros para usar preservativos mais comumente do que as HIV-negativas (31% vs. 5%, p=0,02, e relataram com maior frequência o uso do preservativo na ultima relação sexual (65% vs. 33%, p<0,01. Entre todas as pacientes, questões sobre o risco da transmissão de HIV através da relação sexual (99,6% e compartilhar agulhas durante uso de drogas (99,2% foram mais frequentemente respondidas de forma correta, enquanto que questões relacionadas ao risco de HIV através da doação de sangue (57% foi menor. CONCLUSÕES: Apesar desta população relatar fácil acesso aos serviços e informações sobre doenças sexualmente transmissíveis/Aids, a maioria relatou entendimento inadequado sobre comportamentos sexuais inseguros, particularmente as mulheres HIV-negativas.

  13. ACIDENTES OCUPACIONAIS COM MATERIAL PERFUROCORTANTE EM UM HOSPITAL REGIONAL DE MINAS GERAIS, BRASIL ACCIDENTES OCUPACIONALES CON MATERIAL CORTO-PUNZANTE EN UN HOSPITAL REGIONAL DE MINAS GERAIS, BRASIL OCCUPATIONAL NEEDLESTICK INJURIES IN A REGIONAL HOSPITAL OF MINAS GERAIS, BRASIL

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    JOSELY PINTO DE MOURA

    2006-06-01

    Full Text Available É freqüente a ocorrência de acidentes ocupacionais com materiais perfurocortantes no ambiente hospitalar, envolvendo principalmente os trabalhadores de enfermagem. Este estudo retrospectivo, de natureza descritiva foi realizado num hospital regional do interior de Minas Gerais, no período de janeiro de 2000 a dezembro de 2002 e objetivou caracterizar os acidentes e os acidentados com materiais perfurocortantes. Dos 219 acidentes de trabalho notificados neste período, 139 foram com materiais perfurocortantes, sendo os auxiliares de enfermagem os mais atingidos (43,9%. Quanto ao tempo de exercício profissional, 46,8% dos acidentados tinham de 1 a 5 anos na função e a maioria, 74,1% pertencia ao sexo feminino. Estes acidentes foram mais freqüentes nas clínicas médica e cirúrgica, 21,6% ocorreram devido ao descarte de material perfurocortante em local impróprio e em 46,8% a agulha foi o objeto causador. Conclui-se que conhecer a epidemiologia destes acidentes é fundamental para direcionar ações preventivas nas instituições de saúdeEs frecuente la ocurrencia de los accidentes ocupacionales con material corto-punzante en el ambiente hospitalario, afectando principalmente los trabajadores de enfermería. Este estudio retrospectivo, de naturaleza descriptiva fue realizado en un hospital regional de el interior de Minas Gerais, en el periodo de enero de 2000 a diciembre de 2002 y sus objetivos fueron caracterizar los accidentes y los accidentados con materiales cortopunzantes. De los 219 accidentes de trabajo notificados en este periodo, 139 fueron con materiales corto-punzantes, siendo los auxiliares de enfermería los más afectados (43,9%. Em cuanto al tiempo de ejercicio profesional, 46,8% de los accidentados tenían de 1 a 5 años en la función y la mayoría, 74,1% era mujer. Estos accidentes fueron los mas frecuentes en las clínicas medicas y quirúrgicas, 21,6% ocurrieron debido al descarte de material en local impropio

  14. Os coletores de lixo urbano no município de Dourados (MS e sua percepção sobre os riscos biológicos em seu processo de trabalho The perception of urban garbage collectors of Dourados, in the state of Mato Grosso do Sul, regarding the biological risks involved in their work routine

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    Michelly Angelina Lazzari

    2011-08-01

    Full Text Available A coleta de lixo urbano apresenta vários riscos ocupacionais. O objetivo foi identificar os riscos biológicos a que estão expostos os coletores de lixo urbano de Dourados/MS. Foi feita uma pesquisa qualitativa, segundo o Discurso do Sujeito Coletivo de Lefévre e Lefévre. A população abrangeu 42 trabalhadores, lotados na empresa que presta serviços à Secretaria Municipal de Serviços Urbanos. A coleta de dados através de entrevistas ocorreu de setembro de 2005 a janeiro de 2006. As entrevistas duraram em média 40 minutos, foram realizadas no escritório da empresa, em horário de chegada dos funcionários, gravadas em fita K7 e transcritas. Os riscos biológicos, segundo os coletores, são acidentes com vidro, seringas, espinhos, mordida de cães e contato com substâncias do lixo. Os acidentes com perfurocortantes constituem porta-de-entrada para microorganismos como bactérias, vírus e fungos. A contaminação com vírus (HIV e Hepatites B e C pode ocorrer através de acidentes com agulhas contaminadas descartadas nos resíduos. Concluímos que os riscos biológicos na coleta de lixo urbano podem diminuir com orientações à população.There are several occupational risks inherent to urban garbage collection, and the scope of this study was to identify the biological risks to which urban garbage collectors in Dourados/MS are exposed. A qualitative study using the Lefévre and Lefévre Collective Subject Discourse method was used with 42 urban garbage collectors working for the outsourced provider to the Municipal Department of Urban Services. Data were collected from September 2005 to January 2006. The interviews had an average duration of 40 minutes, and were recorded at the company office when the workers arrived to start their working day and subsequently transcribed. The biological risks mentioned by the garbage pickers were accidents with glass, syringes, thorns, dog bites, and contact with substances found in the garbage

  15. Meridional overturning transports at 30°S in the Indian and Pacific Oceans in 2002-2003 and 2009

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    Hernández-Guerra, Alonso; Talley, Lynne D.

    2016-08-01

    The meridional circulation and transports at 30°S in the Pacific and Indian Oceans for the years 2002-2003 and 2009 are compared, using GO-SHIP hydrographic section data with an inverse box model and several choices of constraints. Southward heat transport across the combined Indian-Pacific sections, reflecting net heating north of these sections, doubled from -0.7 ± 0.2 PW in 2002-2003 to -1.4 ± 0.1 PW in 2009 (negative sign is southward), with the increase concentrated in the Indian Ocean (∼0.6 PW compared with ∼0.2 PW in the Pacific), and was insensitive to model choices for the Indonesian Throughflow. Diagnosed net evaporation also more than doubled in the Indian Ocean, from 0.21-0.27 Sv in 2002-2003 to 0.51-0.58 in 2009, with a smaller but significant increase in net evaporation in the Pacific, from 0.06-0.08 Sv to 0.16-0.32 Sv. These increased heat and freshwater exports coincided with Indian Ocean warming, a shift in the Indian's shallow gyre overturning transport to lower densities, and an increase in southward Agulhas Current transport from 75 Sv in 2002 to 92 Sv in 2009. The Indian's deep overturn weakened from about 11 Sv in 2002 to 7 Sv in 2009. In contrast, the Pacific Ocean overturning circulation was nearly unchanged from 2003 to 2009, independent of model within the uncertainties. The East Australian Current transport decreased only slightly, from -52 Sv to -46 Sv. The southward Pacific Deep Water transport was at a higher density than the southward Indian Deep Water transport in both years and all models, similar to prior results. Estimated diapycnal diffusivity and velocity are strongly enhanced near the ocean bottom and are higher farther up in the water column in the Indian than in the Pacific, likely extending the reach of Indian Ocean overturning up to shallower depths than in the Pacific. The horizontal distribution of transports in the Pacific at all depths changed notably from 2003 to 2009, despite the stability of its meridional

  16. Abnormal dip phenomenon: a characteristic electrophysiological marker in interdigital neuropathy of the foot Fenômeno da diminuição de amplitude anormal: um marcador eletrofisiológico característico da neuropatia interdigital do pé

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    Diogo F. de Almeida

    2007-09-01

    Full Text Available OBJECTIVE: The nerve conduction findings in interdigital neuropathy of the foot (IDN; Morton's neuroma have rarely been reported. We analyzed the nerve conduction data in 23 patients with suspected IDN studied between 1982 and 2002. METHOD: Diagnosis of IDN was made on the basis of clinical features. All patients underwent routine nerve conduction studies and a near-nerve needle sensory nerve conduction study of the interdigital nerves by Oh's method in the symptomatic foot. RESULTS:Of the 23 patients, the diagnosis of definite IDN was made in 13 cases and of possible NDN in the others cases. Nineteen were females. Twenty two patients had only one nerve affected. One patient had two nerves affected. The III-IV interdigital nerve was affected in 17 cases and the II-III interdigital nerve in 7 cases. The near-nerve needle nerve conduction showed abnormality in the affected interdigital nerves in all definite IDN cases and confirmed the diagnosis of IDN in 10 cases by the abnormal dip phenomenon (a selective decrease of 50% or more in the sensory CNAP amplitude of the affected nerve compared with that of the preceding interdigital nerve. In 11 possible IDN cases, IDN was identified by the abnormal dip phenomenon. CONCLUSION: The near-nerve needle sensory nerve conduction of the interdigital nerves is a highly sensitive diagnostic test, and abnormal dip phenomenon is the most characteristic electrophysiological marker for the diagnosis of IDN.OBJETIVO: Os achados da condução nervosa na neuropatia interdigital do pé (NIP têm sido raramente descritos. Nós analisamos os dados da condução nervosa de 23 pacientes com suspeita de NIP entre 1982 e 2002. MÉTODO: O diagnóstico de NIP foi clínico. Todos os pacientes foram submetidos a estudos de condução nervosa de rotina e ao estudo de condução sensitiva dos nervos interdigitais com agulha justa-neural pelo método de Oh. RESULTADOS: Dos 23 pacientes, o diagnóstico de NIP foi definitivo em 13

  17. Surto de tétano em búfalos (Buballus bubalis no Estado do Pará Outbreak of tetanus in bufalloes (Buballus bubalis in Pará, Brazil

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    José Diomedes Barbosa

    2009-03-01

    Full Text Available Descreve-se um surto de tétano em búfalos da raça Murrah em uma propriedade situada no município de São Caetano de Odivelas, localizado na região metropolitana de Belém, estado do Pará. Do rebanho de 250 bubalinos, 80 animais foram vacinados contra raiva por via intramuscular na região da garupa. Em um período de 15 a 19 dias após a vacinação quatro animais adoeceram, um morreu com dois dias de evolução, um foi eutanasiado in extremis no sétimo dia após o início dos sinais clínicos e os demais se recuperaram após tratamento. Nos bubalinos, o primeiro sinal clínico observado foi o prolapso da terceira pálpebra, em especial quando o animal era estimulado, seguido por andar rígido, manifestado por dificuldade de flexão dos membros e permanência em decúbito lateral com os membros estendidos, pálpebras muito abertas, sialorréia, hiperexcitabilidade, orelhas eretas, leve trismo e acúmulo de alimento na cavidade oral. À necropsia foi evidenciada uma área de coloração amarelada com presença de exsudação purulenta na musculatura da região da garupa, local de aplicação da vacina. Ao exame histopatológico não foram evidenciadas alterações significativas. Em dois animais foi realizado tratamento com penicilina por via intramuscular e soro antitetânico por via intramuscular e sub-aracnóide; após duas semanas esses animais se recuperaram. Diante do quadro clínico, dos dados epidemiológicos e da ausência de lesões histológicas foi feito o diagnóstico de tétano. Concluiu-se que o tétano é uma doença a ser considerada na bubalinocultura no Brasil. A infecção, provavelmente ocorreu durante o procedimento de vacinação, através injeções intramusculares utilizando agulhas contaminadas.An outbreak of tetanus in Murrah buffaloes in Belém, state of Pará, Brazil, is described. The outbreak was observed in a flock of 250 buffaloes, 80 of which were vaccinated intra-muscularly in the croup against rabies

  18. Biópsia mamária realizada pela técnica de biópsia helicoide: estudo experimental Breast biopsy performed by the helicoid biopsy technique: an experimental study

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    Eliel de Souza

    2010-12-01

    Full Text Available OBJETIVO: avaliar o desempenho da biópsia helicoide na realização de biópsias mamárias. MÉTODOS: foi selecionado aleatoriamente uma amostra composta de 30 pacientes portadoras de câncer de mama submetidas à mastectomia. Foram excluídas as mulheres portadoras de tumor que tivessem consistência pétrea, não-palpável, com manipulação cirúrgica prévia ou que contivesse líquido. Utilizando-se o kit de biópsia helicoide e um equipamento de core biopsy com cânula e agulha de 14 gauge, respectivamente, coletou-se um fragmento por equipamento em área sã e nos tumores, em cada peça cirúrgica, totalizando 120 fragmentos para estudo histológico. Para a análise dos dados, definiu-se um nível de confiança de 95% e utilizou-se o software SPSS, versão 13; o índice de concordância Kappa e o teste paramétrico t de Student. RESULTADOS: a média das idades das pacientes foi de 51,6 anos (±11,1 anos. A core biopsy apresentou sensibilidade de 93,3%, especificidade de 100% e acurácia de 96,7%, enquanto a biópsia helicoide teve sensibilidade de 96,7%, especificidade de 100% e acurácia de 98,3%. Na comparação entre a histologia dos tumores e dos fragmentos de biópsias, houve alto grau de concordância nos diagnósticos (Kappa igual a 0,9, com pPURPOSE: to assess the helicoid biopsy performance when carrying out breast biopsies. METHODS: thirty patients with breast cancer submitted to mastectomy were selected at random. Women with a tumor of petreous consistency, nonpalpable, submitted to previous surgical manipulation or containing fluid were excluded. The helicoid biopsy kit and a core biopsy device with a cannula and a 14-gauge-needle, respectively, were used to collect a fragment each from a healthy area and from the tumor of each surgical specimen, for a total of 120 fragments for histological study. Data were analyzed statistically by the parametric Student's t-test and by the Kappa concordance index at the 95% confidence level

  19. Tratamento artroscópico da tendinite calcária do manguito rotador Arthroscopic treatment of calcifying tendinitis of the rotator cuff

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    Arnaldo Amado Ferreira Neto

    2010-01-01

    Full Text Available OBJETIVO: Avaliar os resultados clínicos e radiográficos do tratamento cirúrgico por via artroscópica em pacientes com tendinite calcária do manguito rotador. MÉTODO: Foi realizado um estudo retrospectivo com análise de 20 pacientes que foram submetidos ao tratamento artroscópico da tendinite calcária do ombro, de março de 1999 a novembro de 2005. Seis pacientes foram e