Anomalies of the vena cava inferior

International Nuclear Information System (INIS)

Koen, F.R.; Bouwer, A.J.; Bornman, M.S.; Du Plessis, D.J.

1986-01-01

Two cases of anomalous inferior vena cava are presented, with the emphasis on embryology. The firts patient was investigated by venography for a clinically proven varicocele as a probable cause of infertility. A double inferior vena cava was found during venography, and was confirmed by computed tomography (CT). In the second case a left-sided inferior vena cava was an incidental finding when a CT scan was done as a diagnostic procedure in a case of Hodgkin's disease. A short summary of the embryology and the significance of the variants is presented

Spiral CT in aplasia of the pre-renal inferior vena cava as a cause of phlebothrombosis from the femoral veins to the inferior vena cava; Spiral-CT einer Aplasie der praerenalen Vena cava inferior als Ursache einer Phlebothrombose von den Oberschenkelvenen bis in die Vena cava inferior

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Schweiger, U. [Strahlenklinik und Poliklinik, Universitaetsklinikum Rudolf Virchow, Freie Univ. Berlin (Germany); Schedel, H. [Strahlenklinik und Poliklinik, Universitaetsklinikum Rudolf Virchow, Freie Univ. Berlin (Germany); Thiede, U. [Deutsches Herzzentrum Berlin (Germany). Arbeitsgruppe Digitale Bildbearbeitung; Felix, R. [Strahlenklinik und Poliklinik, Universitaetsklinikum Rudolf Virchow, Freie Univ. Berlin (Germany)

1994-12-31

The case report focuses on the computed tomography of the thrombotic okklusion of the inferior vena cava, venae iliacae and femorales communes due to congenital interruption of the prerenal inferior vena cava. The embryology of the abnormality was discussed. (orig.) [Deutsch] Anhand einer Fallstudie wurden die Moeglichkeiten der computertomographischen Diagnostik bei einer durch Teilplasie der `praerenalen` Vena cava inferior hervorgerufenen Thrombose der Vv. femorales superficiales et profundae, der grossen Beckenvenen und der Vena cava inferior erlaeutert. In der Diskussion wurde auf die Embryologie der Missbildung eingegangen. (orig.)

Endovascular management of inferior vena cava filter thrombotic occlusion.

Science.gov (United States)

Branco, Bernardino C; Montero-Baker, Miguel F; Espinoza, Eduardo; Gamero, Maria; Zea-Vera, Rodrigo; Labropoulos, Nicos; Leon, Luis R

2018-01-01

Objective Inferior vena cava occlusion is a potentially life-threatening complication related to caval filters. We present our experience with filter-induced inferior vena cava occlusion in order to assess the feasibility, safety, and effectiveness of endovascular management. Methods A retrospective review of all patients undergoing inferior vena cava filter placement over a 60-month study period was performed. From this cohort, a total of 10 cases of inferior vena cava occlusion after filter placement were identified. Demographics, clinical data, procedures, and outcomes were extracted. Patients were followed to the last clinic visit or until they died. Results One-hundred eighty filters were placed by our group practice during the study period. Of those, a total of 10 patients were identified. Overall, there were 7 males; the mean age was 57.1 years (25-78 years). The median time between inferior vena cava filter placement and filter occlusion was 105 days (range 5-4745 days). All patients were clinically symptomatic at the time of their presentation. Nine out of 10 patients were successfully managed endovascularly. Trellis™-8 thrombectomy was the most common endovascular strategy performed ( n = 9). Four patients had balloon angioplasty, two of those with stent placement for chronically occluded inferior vena cava/iliac veins. No thromboembolic complications developed during a median follow-up period of 233 days (range 4-1083 days). Conclusions Endovascular management of inferior vena cava occlusion is feasible, safe, and effective in decreasing thrombus burden in the presence of an inferior vena cava filter. Further studies evaluating long-term inferior vena cava patency and optimal surveillance regimen after endovascular management of filter-related inferior vena cava occlusion are warranted.

ESTRATÉGIAS COMPETITIVAS USADAS PELAS EMPRESAS DE EVENTOS DE CURITIBA

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Marcos Rogério Maioli

2018-04-01

Full Text Available Este artigo apresenta como duas empresas de organização de eventos de Curitiba Paraná atuam no mercado, como utilizam seus conhecimentos de gestão de forma empírica quando usam as estratégias de competitividade de Porter e Ansoff para atuarem no mercado e fazerem frente as mudanças ambientais ocorridas. Os principais resultados podem ser encontrados no uso das estratégias que fazem frente aos concorrentes, aos serviços substitutos, ao poder de barganha tanto de clientes, fornecedores e aos novos entrantes, também no uso de estratégias de expansão e diversificação. O trabalho está dividido em introdução, fundamentação em turismo, eventos, estratégias competitivas de Porter e Ansoff, a caracterização das empresas estudadas, a metodologia usada a apresentação dos resultados e as conclusões

Trombosis del sector ilio-cava: trombosis puerperal y trombosis en agenesia de la cava inferior Thrombosis of the ileo-caval sector: puerperal thrombosis and agenesia thrombosis of the inferior vena cava

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Jorge García Egea

2011-03-01

Full Text Available La trombosis de la vena cava inferior supone alrededor del 15 % del total de los casos de trombosis venosa profunda. Se presenta un caso de una puérpera primigesta con parto por cesárea que presentó una trombosis con inicio en la vena ovárica derecha y extensión hasta la cava inferior. Fue tratada con heparina de bajo peso molecular en dosis anticoagulantes, reposo con extremidades elevadas y elastocompresión. Tras la evolución satisfactoria del proceso, con lisis parcial del trombo, se comenzó anticoagulación oral con acenocumarol durante 6 meses. El segundo paciente, un varón de 73 años, con antecedentes de hidatidosis hepática intervenida, presentó una trombosis de la cava inferior infrarrenal y agenesia del segmento retrohepático de la cava inferior. El enfermo sigue con tratamiento anticoagulante con acenocumarol, elastocompresión y cuidados higiénicos. Como secuela presentó un síndrome posflebítico con episodios de úlceras flebostásicas y reagudizaciones del edema, que han obligado a su hospitalización en dos ocasiones.The thrombosis of the inferior vena cava account for around the 15% of the cases of deep venous thrombosis. This is the case of a puerperal primigravida with a cesarean section labor presenting with a thrombosis initially in the right ovarian vein and then extension to the inferior vena cava. Treatment included low molecular weight heparin in anticoagulant doses; rest with elevation of the extremities and elastic bandage. After a satisfactory process evolution with partial lysis of the thrombus, the oral anticoagulation with Acenocumarol for 6 months was started. The second patient, a man aged 73 with backgrounds of an operated hepatic hydatidosis, had a thrombosis of the infrarenal inferior vena cava and agenesia of retrohepatic segment of the inferior vena cava. The patient remains with anticoagulant treatment including Acenocumarol, elastic bandage and hygienic care. As sequela he had a postphlebitic

Fatal pericardial tamponade after superior vena cava stenting.

NARCIS (Netherlands)

Ploegmakers, M.J.M.; Rutten, M.J.C.M.

2009-01-01

We discuss a fatal complication of percutaneous superior vena cava (SVC) self-expandable stent placement in a patient with superior vena cava syndrome (SVCS). The SVCS was caused by a malignant mediastinal mass with total occlusion of the SVC. Twenty-four hours after the procedure, the patient died

An unusual cause of an inferior vena cava syndrome

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Regoort, M.; Reekers, J. A.; Kromhout, J. G.

1989-01-01

Two patients are presented with an occlusion of the infrarenal vena cava caused by a vena cava aneurysm. This rare congenital vena caval anomaly may mimic retroperitoneal lymphadenopathy, especially on CT- imaging without contrast enhancement

Ressonância magnética cardiovascular em veia cava inferior interrompida não prevista

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Andre Mauricio Fernandes

2012-02-01

Full Text Available A Veia Cava Inferior (VCI interrompida é uma anomalia rara. As anomalias da VCI são clinicamente importantes para os cardiologistas e radiologistas que pretendem intervir na cavidade cardíaca direita. Descrevemos três casos de interrupção da VCI diagnosticados por meio de estudo imaginológico de ressonância magnética cardíaca.

Un método para el tratamiento de las pilas y baterías domésticas usadas de tamaño medio. III Parte. Propuesta de un método para su tratamiento

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de Juan, D.

1996-06-01

Full Text Available A method for the primary treatment of spent batteries and domestic cells is proposed. Basic processes for the secondary treatment, metals recovering and detoxifying wastes are developed. Iron is directly recovered in the primary treatment as a ferrous scrap. Zinc is recovered from ammoniacal solution obtained in primary treatment by means of a hydrothermal process. For recovering cadmium, copper and nickel, a cementation with zinc dusts is proposed along with the application of the COCADEX process. Detoxifying the fraction bioxide obtained and the mercury recovered are made by heat treatment at 300- 400°C. The heat treatment wastes and the non ferrous fraction can be treated in a Waelz furnace, for the simultaneous recovery of zinc and cadmium contained in the waste as a Waelz oxide.

Se propone un método para llevar a cabo el tratamiento primario de las pilas y baterías domésticas usadas. Se desarrollan los procesos necesarios para realizar el tratamiento secundario, recuperar los metales contenidos y separar los componentes tóxicos de los residuos. En el tratamiento primario se recupera el hierro directamente como una chatarra férrea. El cinc se recupera de la disolución amoniacal procedente del tratamiento primario mediante un proceso hidrotermal. Para la recuperación del cadmio, cobre y níquel se propone su cementación con polvo de cinc y posterior aplicación del proceso COCADEX. La eliminación de los productos tóxicos de la fracción bióxido resultante, así como la recuperación del mercurio se realizan mediante calcinación a 300-400 °C. El residuo de calcinación y la fracción no férrea se pueden tratar conjuntamente en un horno Waelz para recuperar simultáneamente el cinc y el cadmio residual como óxido Waelz.

Tomographic anatomy of the vena cava and renal veins: features relevant to vena cava filter placement

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Thiago Melo do Espírito Santo

2015-03-01

Full Text Available BACKGROUND: There is a growing demand for invasive procedures involving the inferior vena cava, in particular for placement of vena cava filters. It is not always easy to identify the more distal renal vein with cavography, for safe release of filters. OBJECTIVES: To determine parameters for the relationships between the renal veins and the infrarenal vena cava and their corresponding vertebral bodies, their relationships with biotype and the occurrence of anatomic variations, the relationships between vertebral bodies and the bifurcation of the common iliac veins and the distance from this bifurcation to the outflow of the more distal renal vein, with reference to placement of vena cava filters. METHODS: A total of 150 abdominal computed tomography scans conducted from October to November 2011 were analyzed and classified according to the biotype exhibited (using Charpy's angle. Scans were performed at MEDIMAGEM and analyzed at the Integrated Vascular Surgery Service, both part of Hospital da Beneficência Portuguesa in São Paulo, Brazil. RESULTS: In 127 of the 150 scans analyzed (84.66%, the more distal renal vein emerged between the first lumbar intervertebral space (L1-L2 and the body of L2, irrespective of patient biotype. Just 23 patients (15.33% exhibited a more distal renal vein with outflow below the body of L2, i.e. in the projection of the space between L2 and L3. CONCLUSIONS: The radiological correlation between the confluence of the more distal renal vein and vertebral bodies exhibits little variation, irrespective of the biotype of the patient.

Anomalía del retorno venoso sistémico Drenaje anómalo de la vena cava superior derecha a la aurícula izquierda: Revisión de la literatura y reporte de caso Anomalous systemic venous return. Anomalous drainage of the right superior vena cava into the left atrium: Review of literature and case report

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Ríos Giovanny

2012-06-01

Full Text Available La anomalía total del retorno venoso sistémico tiene gran variedad de presentaciones; sin embargo, la patología de más baja frecuencia es el drenaje de vena cava superior derecha a la aurícula izquierda, hecho de peso para que en el mundo se reporten pocos casos. En la Fundación Clínica Abood Shaio se trató el caso de una paciente de seis años de edad con drenaje venoso total de cava superior derecha a la aurícula izquierda, mediante la técnica de movilización de cava superior y anastomosis cavo-atrial, y se obtuvieron buenos resultados. El caso es mención corresponde al número 21 en la literatura mundial.Total anomalous systemic venous return has a variety of presentations, being the drainage of right superior vena cava into the left atrium a low frequency condition. There are few reported cases in the world. In Shaio Clinic Foundation we have handled a case of total venous drainage of the right superior vena cava into the left atrium in a 6-year old girl, using the superior vena cava mobilization technique and cavo-atrial anastomosis, with good results. This case is reported as case number 21 in the world.

Anastomosis cava-pulmonar en el tratamiento quirúrgico de la tetralogía de Fallot

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José Félix Patiño

1965-01-01

Full Text Available Se informa sobre la aplicación clínica exitosa de la técnica de anastomosis cava-pulmonar, originalmente descrito por Glenn y Patiño, en un caso de Tetralogía de Fallot. Representa este caso el primer paciente tratado en esta forma en la literatura médica occidental. La anastomosis cava-pulmonar es un procedimiento técnicamente muy sencillo que permite mejorar notablemente la oxigenación en pacientes que presentan ciertas anomalías en el corazón derecho o en la arteria pulmonar. La anastomosis cava-pulmonar parece ser una operación fisiológica fácil de realizar, bien tolerada, que da como resultado buena oxigenación de la sangre venosa desembocada al pulmón derecho, y que en el caso de la Tetralogía de Fallot, presenta notables ventajas sobre las operaciones paliativas clásicas de Blalock y Potts. La anastomosis cava-pulmonar es un procedimiento que puede ser usado en el tratamiento quirúrgico de la Tetralogía de Fallot como operación paliativa definitiva, o como la primera etapa que mejora las condiciones generales del paciente para permitir que más tarde pueda ser llevado a corrección definitiva. Esta anastomosis, que disminuye trabajo al corazón, no necesariamente tiene que ser deshecha a tiempo de la corrección definitiva, a diferencia de las operaciones clásicas de Blalock y Pott, que sí añaden trabajo al corazón al crear un ductus artificial y una hipertensión pulmonar. Se propone el uso clínico de la anastomosis cava-pulmonar en aquellos casos de Tetralogía de Fallot que requieran una operación paliativa extra-cardíaca o como la primera etapa antes de ser sometidos a la corrección definitiva por circulación extracorpórea.

Right superior vena cava draining into the left atrium

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Calcagni, Giulio; Sidi, Daniel; Bonnet, Damien [University Rene Descartes-Paris 5, Department of Paediatric Cardiology, Hopital Necker-Enfants Malades, Paris (France); Batisse, Alain [Institut de Puericulture et de Perinatalogie, Paris (France); Vouhe, Pascal [University Rene Descartes-Paris 5, Department of Paediatric Cardiac Surgery, Hopital Necker-Enfants Malades, Paris (France); Ou, Phalla [University Rene Descartes-Paris 5, Department of Paediatric Cardiology, Hopital Necker-Enfants Malades, Paris (France); University Rene Descartes-Paris 5, Department of Pediatric Radiology, Hopital Necker-Enfants Malades, Paris (France)

2008-08-15

The right superior vena cava draining into the left atrium is a rare malformation causing cyanosis and clubbing in patients in whom no other signs of congenital heart defect are present. Diagnosis may be difficult as cyanosis may be mild and the anomaly is not always easily detectable by echocardiography. For this reason we report a 13-month-old male in whom we confirmed the clinical and echocardiographic suspicion of anomalous drainage of the right superior vena cava using multidetector CT. This allowed successful surgical reconnection of the right superior vena cava to the right atrium. (orig.)

Right superior vena cava draining into the left atrium

International Nuclear Information System (INIS)

Calcagni, Giulio; Sidi, Daniel; Bonnet, Damien; Batisse, Alain; Vouhe, Pascal; Ou, Phalla

2008-01-01

The right superior vena cava draining into the left atrium is a rare malformation causing cyanosis and clubbing in patients in whom no other signs of congenital heart defect are present. Diagnosis may be difficult as cyanosis may be mild and the anomaly is not always easily detectable by echocardiography. For this reason we report a 13-month-old male in whom we confirmed the clinical and echocardiographic suspicion of anomalous drainage of the right superior vena cava using multidetector CT. This allowed successful surgical reconnection of the right superior vena cava to the right atrium. (orig.)

Drenagem anômala de veia pulmonar inferior direita em veia cava inferior associada a apêndice hepático intracardíaco Anomalous drainage of the right inferior pulmonary vein into the inferior vena cava associated to intrathoracic hepatic appendix

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Carlos R Moraes

1988-08-01

Full Text Available Descreve-se o caso de uma paciente de 61 anos de idade, com drenagem anômala de veia pulmonar inferior direita em veia cava inferior, associada a apêndice hepático intratorácico, herniado através de fenda no diafragma. A correção cirúrgica foi realizada por anastomose direta da veia anômala com o átrio esquerdo, pela redução do apêndice hepático para a cavidade abdominal e, finalmente, pelo fechamento do defeito diafragmático. O pós-operatório decorreu sem qualquer complicação. Os autores chamam a atenção para a raridade do caso.The authors present a case of a 61-year-old woman with anomalous drainage of the right inferior pulmonary vein into the inferior vena cava associated to an intrathoracic hepatic appendix herniated through a diaphragmatic defect. Surgical correction was obtained by direct anastomosis of the anomalous vein to the left atrium, reduction of the hepatic appendix to the abdominal cavity and closure of the diphragmatic defect. The postoperative course was unevenftul. The rarity of this condition is stressed.

Experience with three percutaneous vena cava filters

International Nuclear Information System (INIS)

McCowan, T.C.; Ferris, E.J.; Harshfield, D.L.; Hassell, D.R.; Baker, M.L.

1987-01-01

Twenty-one Kimray-Greenfield, 33 bird's nest, and 19 Amplatz vena cava filters were placed percutaneously. The Kimray-Greenfield filter was the most difficult to insert. The major problem was the insertion site, which required venipuncture with a 24-F catheter. Minor hemorrhage was frequent, and femoral vein thrombosis occurred in four patients. No migration, caval thrombosis, or pulmonary emboli were seen after Kimray-Greenfield filter placement. The bird's nest filter was relatively easy to insert, although in two cases the filter prongs could not be adequately seated in the wall of the inferior vena cava. Three patients with bird's nest filters had thrombosis below the filter, and three filters migrated to the heart. One migrated filter could not be removed. One patient had multiple small pulmonary emboli at autopsy. No other pulmonary emboli after filter placement were noted. The Amplatz filter was the easiest of the three filters to insert. Only one patient with an Amplatz filter had thrombosis of the vena cava below the filter. No filter migrations were documented, and no recurrent pulmonary emboli were found on clinical or radiologic follow-up. The Amplatz vena cava filter is easier to place than percutaneous Kimray-Greenfield or bird's nest filters, has a low complication rate, and has proven to be clinically effective in preventing pulmonary emboli

Primary research on direct multi-slice spiral CT venography in inferior vena cava

International Nuclear Information System (INIS)

Gong Peiyou; Liu Fengli; Ma Xianying; Zhao Li; Wang Liping; Li Xuehua; Li Jian

2010-01-01

Objective: To investigate the superiority of direct multi-slice spiral CT venography in inferior vena cava. Methods: Twenty-eight patients performed MSCT venography in inferior vena cava, including 2 cases with both indirect and direct venography, 10 cases with indirect venography, 20 cases with direct venography through unilateral or bilateral lower extremity venous injection. The image quality and enhancement degree of the inferior vena cava were compared in double-blind method. Results: Of 10 cases with indirect venography of inferior vena cava, 1 case was failed due to mild enhancement in inferior vena cava. Image quality was good in 2 cases, poor in 7 cases, no excellent case. Of 20 cases with direct venography of inferior vena cava, the enhancement degree was scored 1, 2 degree in 16, 4 cases respectively and no case was scored 3 degree, the image quality was excellent, good in 16, 4 cases and no case was bad. The success rate was 100%. Conclusion: The image quality of direct MSCT venography in inferior vena cava is better than that of indirect method. (authors)

QRLabel y Blackbird: 2 aplicaciones accesibles para Android

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Mercade Aguila, Gisela

2012-01-01

El objetivo de este proyecto es el de realizar dos aplicaciones para dispositivos móviles con sistema operativo Android. Estas aplicaciones están ideadas para ser usadas por una persona invidente o con deficiencias visuales. El transcurso del desarrollo de cada aplicacion sirve para conocer y experimentar con diferentes herramientas que dispone este sistema operativo, y de este modo estudiar sus ventajas y limitaciones. Se presentan dispositivos y prototipos de dispositivos diseñados exclusiv...

Is it worth adding an inferior vena cava filter to anticoagulation in thromboembolic disease?

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Alexandra Yunes

2017-06-01

Full Text Available Resumen A pesar del tratamiento anticoagulante, algunos pacientes que han presentado un episodio de enfermedad tromboembólica persisten con riesgo elevado de recurrencia. Se ha planteado que adicionar un filtro de vena cava inferior podría disminuir este riesgo, pero la real utilidad clínica no está clara. Para responder esta pregunta utilizamos la base de datos Epistemonikos, la cual es mantenida mediante búsquedas en múltiples fuentes de información. Identificamos tres revisiones sistemáticas que en conjunto incluyen cuatro ensayos aleatorizados que responden la pregunta. Extrajimos los datos, realizamos un metanálisis y preparamos tablas de resumen de los resultados utilizando el método GRADE. Concluimos que podría existir poca o nula diferencia en cuanto a la ocurrencia de trombosis venosa profunda al agregar un filtro de vena cava inferior en pacientes anticoagulados, y que no está claro si existen diferencias en cuanto a la ocurrencia de tromboembolismo pulmonar o mortalidad porque la certeza de la evidencia es muy baja.

Stigmata: como as marcas são usadas para marcar os consumidores

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André Luiz Maranhão de Souza Leão

Full Text Available Apesar da crescente busca de conhecimento acerca da importância das marcas, pouco sabemos sobre como os consumidores atribuem significados às mesmas em sua vida cotidiana. Com isso em mente, desenvolvemos este estudo visando identificar como os consumidores significam as marcas quando interagem entre si, assumindo que nas interações sociais existe uma forte influência entre os consumidores e, portanto, as impressões de uns interferem nos juízos dos outros. Para tal, uma etnografia da comunicação foi realizada por meio da observação participante da interação cotidiana de pessoas de diferentes grupos sociais. Um dos principais resultados a que chegamos foi o de que as pessoas utilizam as marcas como meio de estigmatizar o outro em interações sociais. Nossos achados alinham-se à teoria social de Erving Goffman, o que pode servir de base a uma rica interpretação desse nível de significação das marcas pelos consumidores. Nossos resultados apontam para 24 formas de estigmatização pelas marcas, distribuídas em três categorias: "comunal", "social" e "pessoal". Ao final, analisamos possíveis contribuições, tanto para a academia quanto para a gestão de marcas.

Symplastic Leiomyoma in the Suprarenal Inferior Vena Cava

International Nuclear Information System (INIS)

Kahveci, Volkan; Ogur, Torel; Cipe, Gokhan; Ozdemir, Sevim; Hazinedaroglu, Selcuk

2012-01-01

Leiomyomas are benign tumors of the soft tissue and may develop in any location where smooth muscle is present. Leiomyoma in the inferior vena cava is a rarely seen pathology, and symplastic leiomyoma is also a rare histological variant of leiomyoma. In this case, we present a rare histological variant of symplastic leiomyoma in the inferior vena cava (IVC). This is the first radiologically reported case of a symplastic leiomyoma of the IVC

Tecnologias usadas no Brasil para a recuperaçao de sementes crioulas

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Oscar Emerson Zúñiga Mosquera

2014-12-01

Full Text Available Esta investigación tuvo como objetivo caracterizar los procesos de implementación y administración de las tecnologías para la conservación local de las semillas nativas. Las semillas nativas representan una alternativa importante para los agricultores, pues son el resultado de un largo proceso de adaptación a diferentes condiciones ambientales, además son esenciales para los consumidores toda vez que son una garantía de la bioseguridad y seguridad alimentaria. El uso de semillas nativas se ha reforzado con los movimientos y las instituciones vinculados a la agroecología, así como con las familias de los agricultores, que en los últimos años las han estado conservando a través de diferentes tecnologías; estas acciones tienen el objetivo de extender las semillas nativas y variedades locales a los agricultores promoviendo prácticas de la autonomía y la resistencia al avance de los transgénicos.

Symptomatic duodenal perforation by inferior vena cava filter.

Science.gov (United States)

Baptista Sincos, Anna Pw; Sincos, Igor R; Labropoulos, Nicos; Donegá, Bruno C; Klepacz, Andrea; Aun, Ricardo

2017-01-01

Objectives Duodenal perforation by an inferior vena cava filter is rare and life threatening. Our objective is to find out number of occurrences and compare diagnosis and treatments. Method The reference list of Malgor's review in 2012 was considered as well as all new articles with eligible features. Search was conducted on specific databases: MEDLINE, Web of Sciences, and Literatura Latino-Americana e do Caribe em Ciências da Saúde. Results Most of the patients presented with upper abdominal pain and the use of radiologic studies was crucial for diagnosis. The most common treatment was laparotomy with filter or strut removal plus duodenum repair. However, clinical conditions of patients must be considered and the endovascular technique with endograft deployment into inferior vena cava may be an alternative. Conclusion Duodenal perforation by an inferior vena cava filter is uncommon and in high-risk surgical patients endovascular repair must be considered.

Experimental study of domestic inferior vena cava filter comparative to Antheor temporary vena cava filter in vitro

International Nuclear Information System (INIS)

Chen Guoping; Gu Jianping; Lou Wensheng; He Xu; Chen Liang; Su Haobo

2007-01-01

Objective: To evaluate clot capturing efficacy and stability of a new domestic designed inferior vena cava filter (DDIVCF) by comparing with Anthem temporary vena cava filter in vitro. Methods: (1)The DDIVCF and Antheor filter were tested in a flow model simulated the inferior vena cava (IVC) with 20 mm and 25 mm in diameter. The swine clots of four sizes were used: 3 mm x 20 mm, 3 mm x 30 mm, 6 mm x 20 mm, 6 mm x 30 mm. The clot capturing capacity was observed in horizontal position. (2) The stability was observed by measuring the comparative moving distance of 6 mm x 30 mm clots after clot trapping. Results: (1) DDIVCF capture rates were 34%, 56%, 82%, 94% and 26%, 38%, 56%, 86% for the 20 mm and 25 mm IVC models of four different sizes clots respectively, comparing with 54%, 64%, 86%, 96% and 38%, 44%, 68%, 90% respectively of Anthem temporary vena cava filter. The capture rates of DDIVCF and Antheor filter showed no significant differences of 3 mm x 30 mm, 6mm x 20 mm and 6 mm x 30 mm clots in 20 mm and 25 mm IVC models (P>0.05). (2) There was a few caudal migration with no significant difference (P>0.05). The filter migration distances were (0.6±0.3) cm and (1.0±0.1) cm respectively in the 20 mm and 25 mm IVC models with most clots of 6 mm x 30 mm were captured, comparing with (0.4±0.1) cm and (0.8 ±0.3) cm respectively for Antheor filter. Conclusions: DDIVCF is a stable and effective filter in an in-vitro model experiment but application in vivo would rather be further evaluated through more animal experiments. (authors)

A new Nitinol stent for use in superior vena cava syndrome

DEFF Research Database (Denmark)

Andersen, Poul Erik; Midtgaard, Annette; Brenøe, Anne-Sofie

2015-01-01

AIM: The aim of the study was to assess the early clinical experience with the Zilver Vena stent in treating patients with malignant superior vena cava syndrome. METHODS: Demographic, procedural, and follow-up data of 12 patients (seven women; mean age 69 years) treated for superior vena cava...... syndrome with in all 21 Zilver Vena stents between March 2012 and October 2013 were retrospectively reviewed. All cavographies and contrast enhanced CT related to the treatment and during follow-up were evaluated and the patients had clinical follow-up until dead. They were all in terminal state...... at the time of stent deployment. RESULTS: All patients had superior vena cava obstruction and clinical superior vena cava syndrome caused by malignant expansive mediastinal disease (eight patients non-small cell lung cancer and four small cell lung cancer). The technical success with deployment of the stents...

Efeitos da sibutramina sobre o sistema reprodutor masculino de ratos

OpenAIRE

Bellentani, Fernanda Furlanetto [UNESP

2011-01-01

A sibutramina é uma droga usada mundialmente para o tratamento da obesidade. Poucos A sibutramina é uma droga usada mundialmente para o tratamento da obesidade. Poucos A sibutramina é uma droga usada mundialmente para o tratamento da obesidade. Poucos A sibutramina é uma droga usada mundialmente para o tratamento da obesidade. Poucos A sibutramina é uma droga usada mundialmente para o tratamento da obesidade. Poucos A sibutramina é uma droga usada mundialmente para o tratamento da obesidade. ...

Vena cava superior syndrome associated with sarcoidosis

International Nuclear Information System (INIS)

Wurm, K.; Walz, M.; Reidemeister, J.C.; Donhuijsen, K.

1988-01-01

We report the first observation of clinical manifestations of vena cava superior syndrome (VCSS) associated with sarcoidosis. Twenty-four years after the first signs of the disease had been noted, mediastinal lymphomas penetrating the wall of the vena cava superior caused complete obstruction. It is most unusual for the vessel wall to be destroyed in this way, which explains why VCSS is often missed in sarcoidosis. The obstructed vessel was resected and successfully replaced by a Gore-Tex prosthesis. The importance of VCSS for the differential diagnosis is pointed out. Two further peculiarities are the simultaneous occurrence of elevated intraocular pressure and VCSS, and the familial incidence. (orig.) [de

Inferior vena cava filter penetration following Whipple surgical procedure causing ureteral injury.

Science.gov (United States)

Abdel-Aal, Ahmed Kamel; Ezzeldin, Islam B; Moustafa, Amr Soliman; Ertel, Nathan; Oser, Rachel

2015-12-01

We report a case of an indwelling inferior vena cava filter that penetrated the IVC wall after Whipple's pancreatico-duodenectomy procedure performed in a patient with ampullary carcinoma, resulting in right ureteral injury and obstruction with subsequent hydroureter and hydronephrosis. This was incidentally discovered on a computed tomography scan performed as routine follow up to evaluate the results of the surgery. We retrieved the inferior vena cava filter and placed a nephrostomy catheter to relieve the ureteral obstruction. Our case highlights the importance of careful inferior vena cava manipulation during abdominal surgery in the presence of an inferior vena cava filter, and the option of temporary removal of the filter to be placed again after surgery in order to avoid this complication, unless protection is required against clot migration during the surgical procedure.

CT diagnosis of tumor thrombus of the renal vein and inferior vena cava

International Nuclear Information System (INIS)

Masuda, Fujio; Chen, Zuicho; Oishi, Yukihiko; Machida, Toyohei

1980-01-01

We used computed tomography (CT) for diagnosis in 4 cases of renal tumor associated with tumor thrombus of the renal vein and inferior vana cava. The results obtained are described below: A total of 4 cases consisting of 3 cases of renal cell carcinoma and one case of squamous cell carcinoma of the renal pelvis, treated at the Jikei University Hospital during the six months period from January to June of 1979, were studied. The affected side was right in 3 cases and left in one case. In all of the former cases the tumor thrombus was extending from the renal vein to the inferior vena cava, while in the latter case it was confined in the renal vein. All these 4 cases received CT together with renal arteriography and inferior venacavography, followed by nephrectomy, and were confirmed of the presence of tumor thrombus in the renal vein and inferior vena cava operatively. CT findings revealed a pronounced enlargement of the renal vein, and tumor thrombus of the renal vein was diagnosed in all of the 4 cases. In 2 of 3 cases in which tumor thrombus extended to the inferior vena cava, the dilated renal vein was found to be connected to the slightly dilated inferior vena cava, while in the remaining one case the outline of the inferior vena cava was obscure, showing no clear dilatation. After contrast enhancement, a filling defect was seen in the inferior vena cava. CT findings of tumor thrombus in the vein indicated a dilatation of the renal vein and inferior vena cava. In addition, a filling defect was found after contrast enhancement, suggesting that CT is helpful as a diagnostic aid. (author)

Retrocaval ureter and anomalies of inferior vena cava

International Nuclear Information System (INIS)

Tsubogo, Yoshitaka; Hiraoka, Hisaki; Tonariya, Yoshito; Miyamae, Tatsuya; Fujioka, Mutsumi

1980-01-01

We report two cases of retrocaval ureter: one with the usual hook-shaped pattern of the course of ureter (Type 1 according to Kenawi and Williams) and the other with the ureter medially displaced in a large curving fashion without kinking or obstruction. (Type 2). The second case was diagnosed on CT without resorting to any invasive procedure. It can be classified as Type 2 of Kenawi and Williams because of the absence of obstruction and kinking of ureter. The first case is associated with a complicated anomaly of inferior vena cava previously not reported which shows the duplication of infrarenal segment of cava with azygos continuation via the right persistent supracardinal vein. This anomaly is also complicated by the persistent posterior cardinal vein which is continuous with the normal prerenal segment of cava after receiving the right renal vein. This persistent posterior cardinal vein is the cause of retrocaval ureter in this case. It is also stressed that the knowledge of various caval anomalies is important in the interpretation of CT. (author)

Blunt injury of the infrarenal inferior vena cava — imaging and ...

African Journals Online (AJOL)

Blunt injury of the infrarenal inferior vena cava — imaging and conservative management. Ian C Duncan, Basil J Sher, Leslie M Fingleson. Abstract. Isolated rupture of the infrarenal segment of the inferior vena cava due to blunt trauma is relatively rare. It may be missed clinically and even diagnostic peritoneal lavage may ...

Creation of the permanent inferior vena cava filter for prevention of pulmonary artery embolism

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Yа.O. Povar

2016-05-01

Full Text Available The aim of the study was to create a new permanent cava filter to improve functional capacities of the construction and achieve high clinical parameters. A new geometry of the permanent inferior vena cava filter was presented which has high blood clot-capturing ability, does not cause thrombus fragmentation, makes migration impossible. The inferior vena cava filter does not injure the vessel wall and preserves integrity under long-term use. The inferior vena cava filter installation is safe and controllable, the filter self-positioning and reposition are possible, the delivery system size is 6F, the blood flow changing is minimal.

Tromboembolismo pulmonar asociado al síndrome de la vena cava superior de origen trombótico

OpenAIRE

Barrera-López, Ana Madeleine; Cortés-P., Luis Arcadio; Salazar-C., Erika María

2016-01-01

Se describe el caso de un paciente masculino de 32 años de edad, quien consulta al servicio de urgencias con historia clínica del síndrome de la vena cava superior, en el estudio de la angiotomografía pulmonar, se demuestra embolismo pulmonar izquierdo, trombosis de la vena yugular interna derecha y confluente yugulo subclavio. No hay evidencia de asociación con neoplasia, infecciones o enfermedades del tejido conectivo, siendo el único factor de riesgo asociado para la trombosis, hiperviscoc...

Superior and inferior vena cavae: Embryology, variants, and pathology

International Nuclear Information System (INIS)

Mendelson, D.S.; Mitty, H.; Janus, C.; Gendal, E.; Berson, B.

1987-01-01

The superior and inferior venae cavae may be involved in a host of disease processes. Knowledge of the normal anatomy and variants of these structures is valuable in interpreting plain films and the results of angiographic procedures and all cross-sectional modalities. The authors review the embryology of venae cavae and proceed to describe their normal anatomy and variants. An awareness of the variants can prevent mistaking variants for pathologic processes. Finally, the authors describe pathology involving these vessels and demonstrate the radiographic manifestations

Comunicação interatrial do tipo seio coronário, comunicação interventricular e ausência de veia cava superior esquerda Coronary sinus atrial septal defect and ventricular septal defect with no left superior vena cava

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Fábio Alves Almeida

1998-10-01

Full Text Available Relatamos um caso raro de um paciente de 21 meses, portador de comunicação interatrial do tipo seio coronário, associada a comunicação interventricular perimembranosa, e ausência de veia cava superior esquerda. O diagnóstico foi realizado através da ecocardiografia e confirmado pela angiografia. O paciente foi operado sem intercorrências, ambos os defeitos foram fechados com patch de pericárdio bovino e o fluxo das veias coronárias ficou direcionado para o átrio esquerdo. Um ecocardiograma mostrou ausência de shunt residual através dos defeitos.We report a rare case of a 21 month old child with a coronary sinus atrial septal defect associated with perimembranous ventricular septal defect and no left superior vena cava. The diagnosis was made by transthoracic echocardiogram and confirmed by angiography. The patient was operated on uneventfully, both defects were closed with bovine pericardial patches and the flow from the coronary veins was directed towards the left atrium. An echocardiogram revealed complete closure of both defects.

Vena cava filter behavior and endovascular response : An experimental in vivo study

NARCIS (Netherlands)

Hoekstra, A; Hoogeveen, Y; Elstrodt, JM; Tiebosch, ATMG

2003-01-01

Purpose: To evaluate the behavior and endovascular response of a new nitinol permanent vena cava filter, the TrapEase. Methods: Percutaneous implantation of the filter was performed in six goats, with inferior vena cava (IVC) diameter close to that of man. Radiologic data concerning the IVC, filter

Sistematização da veia cava caudal em búfalos (Bubalus bubalis bubalis Simpson, 1945

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Adelmar Afonso de Amorim Júnior

2002-01-01

Full Text Available Para o presente trabalho utilizou-se 25 animais, fetos de búfalos da Raça Murrah, com idades variando entre 5 e 9 meses, sendo 15 fêmeas e 10 machos, com vistas à dissecação e sistematização dos vasos em estudo. Os animais foram coletados em abatedouro e fixados em solução aquosa de formol 10%. Obtiveramse para a Veia Cava Caudal os seguintes afluentes de origem: as veias ilíacas comuns direita e esquerda, e seus afluentes colaterais; veia sacral mediana; veias frênicas; veias lombares (1-5; veias circunflexas profunda do ílio direita e esquerda; 3-4 veias hepáticas; veia genital direita (testicular ou ovárica; veias adrenais e veias renais direita e esquerda.

Prosthetic replacement of the infrahepatic inferior vena cava for leiomyosarcoma.

Science.gov (United States)

Illuminati, Giulio; Calio', Francesco G; D'Urso, Antonio; Giacobbi, Daniela; Papaspyropoulos, Vassilios; Ceccanei, Gianluca

2006-09-01

Resection of the infrahepatic inferior vena cava associated with prosthetic graft replacement for caval leiomyosarcoma is an acceptable procedure to obtain prolonged and good-quality survival. A consecutive sample clinical study with a mean follow-up of 40 months. The surgical department of an academic tertiary center and an affiliated secondary care center. Eleven patients, with a mean age of 51 years, who have primary leiomyosarcoma of the infrahepatic inferior vena cava. All of the patients underwent radical resection of the tumor en bloc with the affected segment of the vena cava. Reconstruction consisted of 10 cavocaval polytetrafluoroethylene grafts and 1 cavobiliac graft. An associated right nephrectomy was performed in 2 cases. The left renal vein was reimplanted in the graft in 3 cases. Cumulative disease-specific survival, disease-free survival, and graft patency rates expressed by standard life-table analysis. No patients died in the postoperative period. The cumulative (SE) disease-specific survival rate was 53% (21%) at 5 years. The cumulative (SE) disease-free survival rate was 44% (19%) at 5 years. The cumulative (SE) graft patency rate was 67% (22%) at 5 years. Radical resection followed by prosthetic graft reconstruction is a valuable method for treating primary leiomyosarcoma of the infrahepatic inferior vena cava.

Multidetector row computed tomography and ultrasound characteristics of caudal vena cava duplication in dogs.

Science.gov (United States)

Bertolini, Giovanna; Diana, Alessia; Cipone, Mario; Drigo, Michele; Caldin, Marco

2014-01-01

Caudal vena cava duplication has been rarely reported in small animals. The purpose of this retrospective study was to describe characteristics of duplicated caudal vena cava in a large group of dogs. Computed tomography (CT) and ultrasound databases from two hospitals were searched for canine reports having the diagnosis "double caudal vena cava." One observer reviewed CT images for 71 dogs and two observers reviewed ultrasound images for 21 dogs. In all CT cases, the duplication comprised two vessels that were bilaterally symmetrical and approximately the same calibre (similar to Type I complete duplication in humans). In all ultrasound cases, the duplicated caudal vena cava appeared as a distinct vessel running on the left side of the abdominal segment of the descending aorta and extending from the left common iliac vein to the left renal vein. The prevalence of caudal vena cava duplication was 0.46% for canine ultrasound studies and 2.08% for canine CT studies performed at these hospitals. Median body weight for affected dogs was significantly lower than that of unaffected dogs (P dogs, caudal vena cava duplication should be differentiated from other vascular anomalies when planning surgeries and for avoiding misdiagnoses. © 2014 American College of Veterinary Radiology.

Modeling Flow Past a Tilted Vena Cava Filter

Energy Technology Data Exchange (ETDEWEB)

Singer, M A; Wang, S L

2009-06-29

Inferior vena cava filters are medical devices used to prevent pulmonary embolism (PE) from deep vein thrombosis. In particular, retrievable filters are well-suited for patients who are unresponsive to anticoagulation therapy and whose risk of PE decreased with time. The goal of this work is to use computational fluid dynamics to evaluate the flow past an unoccluded and partially occluded Celect inferior vena cava filter. In particular, the hemodynamic response to thrombus volume and filter tilt is examined, and the results are compared with flow conditions that are known to be thrombogenic. A computer model of the filter inside a model vena cava is constructed using high resolution digital photographs and methods of computer aided design. The models are parameterized using the Overture software framework, and a collection of overlapping grids is constructed to discretize the flow domain. The incompressible Navier-Stokes equations are solved, and the characteristics of the flow (i.e., velocity contours and wall shear stresses) are computed. The volume of stagnant and recirculating flow increases with thrombus volume. In addition, as the filter increases tilt, the cava wall adjacent to the tilted filter is subjected to low velocity flow that gives rise to regions of low wall shear stress. The results demonstrate the ease of IVC filter modeling with the Overture software framework. Flow conditions caused by the tilted Celect filter may elevate the risk of intrafilter thrombosis and facilitate vascular remodeling. This latter condition also increases the risk of penetration and potential incorporation of the hook of the filter into the vena caval wall, thereby complicating filter retrieval. Consequently, severe tilt at the time of filter deployment may warrant early clinical intervention.

Kirurgisk radikal resektion af leiomyosarkom i retrohepatiske vena cava med intrakardial tumortrombosering

DEFF Research Database (Denmark)

Pedersen, Christian Ross; Larsen, Peter Nørgaard; Arendrup, Henrik C

2005-01-01

Sarcoma of the inferior vena cava (IVC) is a rare clinical entity. Surgical treatment of IVC is associated with improved survival. This case report describes a 42-year-old woman with biopsy-proven leiomyosarcoma of the inferior vena cava with intracardial tumour growth. The primary tumour was only...

Evaluation of gradual occlusion of the caudal vena cava in clinically normal dogs.

Science.gov (United States)

Peacock, John T; Fossum, Theresa W; Bahr, Anne M; Miller, Matthew W; Edwards, John F

2003-11-01

To devise a technique for gradual occlusion of the caudal vena cava in dogs and determine effects of complete occlusion of the caudal vena cava. 8 mixed-breed hounds that weighed between 25 and 30 kg. Baseline evaluation of dogs included serum biochemical analyses and determination of glomerular filtration rate (GFR) with dynamic renal scintigraphy and plasma clearance analysis. An occluder was placed around the vena cava in the region cranial to the renal veins. The occluder was attached to a vascular access port. The vena cava was gradually occluded over 2 weeks. The GFR was measured every 2 weeks after surgery, and venograms were performed every 3 weeks after surgery. Blood samples were collected every 48 hours for the first week and then weekly thereafter to measure BUN and creatinine concentrations and activities of alanine transaminase, alkaline phosphatase, and creatinine kinase. Dogs were euthanatized 6 weeks after surgery, and tissues were submitted for histologic examination. The GFR and biochemical data were compared with baseline values. Gradual occlusion of the caudal vena cava was easily and consistently performed with this method, and adverse clinical signs were not detected. Formation of collateral vessels allowed overall GFR to remain constant despite a decrease in function of the left kidney. Measured biochemical values did not deviate from reference ranges. Gradual occlusion of the caudal vena cava may allow removal of adrenal gland tumors with vascular invasion that would otherwise be difficult or impossible to resect.

Widening of mediastinum with persistent left superior Vena cava - CT diagnosis

International Nuclear Information System (INIS)

Neuwirth, J.; Kolar, J.

1992-01-01

Described in this paper are radiographic findings recorded from a case of persistent left superior vena cava which grew manifest by widening of the left contour of the upper mediastinal region. Contrast-enhanced computed tomography (CT) was undertaken to clear up suspicion of mediastinal tumour and revealed double superior vena cava. The diagnosis was then confirmed by digital subtraction venography. (orig.) [de

Design Optimization of Vena Cava Filters: An application to dual filtration devices

Energy Technology Data Exchange (ETDEWEB)

Singer, M A; Wang, S L; Diachin, D P

2009-12-03

Pulmonary embolism (PE) is a significant medical problem that results in over 300,000 fatalities per year. A common preventative treatment for PE is the insertion of a metallic filter into the inferior vena cava that traps thrombi before they reach the lungs. The goal of this work is to use methods of mathematical modeling and design optimization to determine the configuration of trapped thrombi that minimizes the hemodynamic disruption. The resulting configuration has implications for constructing an optimally designed vena cava filter. Computational fluid dynamics is coupled with a nonlinear optimization algorithm to determine the optimal configuration of trapped model thrombus in the inferior vena cava. The location and shape of the thrombus are parameterized, and an objective function, based on wall shear stresses, determines the worthiness of a given configuration. The methods are fully automated and demonstrate the capabilities of a design optimization framework that is broadly applicable. Changes to thrombus location and shape alter the velocity contours and wall shear stress profiles significantly. For vena cava filters that trap two thrombi simultaneously, the undesirable flow dynamics past one thrombus can be mitigated by leveraging the flow past the other thrombus. Streamlining the shape of thrombus trapped along the cava wall reduces the disruption to the flow, but increases the area exposed to abnormal wall shear stress. Computer-based design optimization is a useful tool for developing vena cava filters. Characterizing and parameterizing the design requirements and constraints is essential for constructing devices that address clinical complications. In addition, formulating a well-defined objective function that quantifies clinical risks and benefits is needed for designing devices that are clinically viable.

Liver trauma and transection of the inferior vena cava

International Nuclear Information System (INIS)

Radin, D.R.

1992-01-01

CT of a child with severe liver trauma due to a seat belt injury demonstrated avulsion of a portion of the lateral segment of the left lobe of the liver. The location of nondependent extravasated contrast material aided in identification of the visceral fracture site (the sentinel contrast sign). Associated transection of the inferior vena cava was evidenced by hypoatenuating zones adjacent to all the major hepatic veins and vena cava (hepatic perivenous tracking). Recognition of these two signs is important so that the radiologist can help the surgeon select the optimal operative approach. (orig.)

Anomalía del retorno venoso sistémico Drenaje anómalo de la vena cava superior derecha a la aurícula izquierda. Revisión de la literatura y reporte de caso

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Giovanny Ríos, MD

2012-05-01

Full Text Available La anomalía total del retorno venoso sistémico tiene gran variedad de presentaciones; sin embargo, la patología de más baja frecuencia es el drenaje de vena cava superior derecha a la aurícula izquierda, hecho de peso para que en el mundo se reporten pocos casos. En la Fundación Clínica Abood Shaio se trató el caso de una paciente de seis años de edad con drenaje venoso total de cava superior derecha a la aurícula izquierda, mediante la técnica de movilización de cava superior y anastomosis cavo-atrial, y se obtuvieron buenos resultados. El caso es mención corresponde al número 21 en la literatura mundial.

Injuries of the retrohepatic inferior vena cava and the liver

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Koprivica Radenko

2008-01-01

Full Text Available Beckground. Injuries of the retrohepatic inferior vena cava, and the liver have mortality rate up to 71-78%. We presented a patient with combined injury of the retrohepatic inferior vena cava, liver, craniocerebral and thoracic traumas, inflicted in a traffic accident. Case report. Man, 20 years old has been injured in a traffic accident. At admission, 20 minutes after the injury, the patient was comatose and hypotensive. Bloody content was obtained by abdominal tracer. The patient underwent emergent laparotomy, utilizing trifurcated incision and cell saver device. Abdominal exploration revealed two liters of free blood and massive retroperitoneal hematoma. Manual compression of the liver was done, as well as perihepatic packing, complete hepatic vascular exclusion and mobilization of the right liver lobe. Due to impressive chemodynamic instability supraceliac aortic clamping was performed. Upon exposure of the retrohepatic inferior vena cava and right liver lobe, multiple lacerations of retrohepatic inferior vena cava and right hepatic vein, and right hepatic vein avulsion were found. We also identified an injury of VII and VIII segments of the liver (grade V according to the Moore's classification. Nonexpansive hepatoduodenal ligament hematoma and the injury of II and III segments of the liver group II/III according to Moore were found. Venorrhaphy of the inferior vena cava was done in the area of circumference of the right hepatic vein, a portion of which served as autologous vein patch. Continuous prolene 3/0 venorrhaphy of the distal caval laceration was done. Total caval and aorta clamping time of the inferior vena cava was 41 minutes. Atypical resection, debridment, of hepatic segments was done by using a harmonic scalpel. Hepatoduodenal ligament was declamped after 65 minutes. Fibrin glue was applied on the resectioned area of liver. The patient received 3.2 l of autologuos blood transfusion with 5 units of packed red blood cells, 6

Deep Venous Thrombosis Associated With Inferior Vena Cava Abnormalities And Hypoplastic Kidney In Siblings

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Duicu Carmen

2016-06-01

Full Text Available Congenital inferior vena cava anomalies have a reduced frequency in general population, many times being an asymptomatic finding. Patients caring such anomalies are at risk to develop deep vein thrombosis. In this paper, we present 2 siblings with deep venous thrombosis and inferior vena cava abnormalities, with a symptomatic onset at similar age. The inferior vena cava abnormality was documented by an angio-CT in each case. The thrombophilic workup was negative. Patients were treated with conservative therapy: low molecular weight heparin anticoagulants converted later to oral anticoagulant with resolution of symptoms and disappearance of the thrombus. Finally, in the absence of any risk factor in a young patient admitted with deep vein thrombosis investigations to exclude inferior vena cava anomalies are mandatory.

Heart block and cardiac embolization of fractured inferior vena cava filter.

Science.gov (United States)

Abudayyeh, Islam; Takruri, Yessar; Weiner, Justin B

2016-01-01

A 66-year-old man underwent a placement of an inferior vena cava filter before a gastric surgery 9 years prior, presented to the emergency room with a complete atrioventricular block. Chest x-ray and transthoracic echocardiogram showed struts migrating to right ventricle with tricuspid regurgitation. Cardiothoracic surgery was consulted and declined an open surgical intervention due to the location of the embolized fragments and the patient's overall condition. It was also felt that the fragments had migrated chronically and were adhered to the cardiac structures. The patient underwent a dual-chamber permanent pacemaker implantation. Post-implant fluoroscopy showed no displacement of the inferior vena cava filter struts due to the pacemaker leads indicating that the filter fracture had likely been a chronic process. This case highlights a rare combination of complications related to inferior vena cava filter fractures and the importance of assessing for such fractures in chronic placements. Inferior vena cava filter placement for a duration greater than 1 month can be associated with filter fractures and strut migration which may lead to, although rare, serious or fatal complications such as complete atrioventricular conduction system disruption and valvular damage including significant tricuspid regurgitation. Assessing for inferior vena cava filter fractures in chronic filter placement is important to avoid such complications. When possible, retrieval of the filter should be considered in all patients outside the acute setting in order to avoid filter-related complications. Filter retrieval rates remain low even when a retrievable filter is in place and the patient no longer has a contraindication to anticoagulation.

Síndroma da veia cava superior como apresentação de neoplasia Superior vena cava syndrome as tumour presentation

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Nuno Filipe Pires

2010-01-01

Full Text Available A síndroma da veia cava superior (SVCS é causada por uma obstrução/compressão gradual e insidiosa da veia cava superior, caracterizando -se por fácies pletórica, edema e ingurgitamento vascular do pescoço e parte superior do tronco. É geralmente tradutora de neoplasia, sendo o cancro do pulmão a sua causa mais comum. Objectivo: Estudo retrospectivo dos internamentos no Hospital de S. João entre Janeiro de 1995 e Dezembro de 2006 por SVCS de etiologia a esclarecer com a caracterização clínica dos doentes e a avaliação de factores de prognóstico. Material e métodos: Foram seleccionados 60 doentes que à data de admissão não tinham causa para SVCS. Foram avaliados, entre outros, idade, sexo, exposição e carga tabágica, etiologia do SVCS, tratamento e sobrevivência global. Resultados: Dos doentes estudados, 87% apresentavam cancro do pulmão, sendo o tipo histológico mais comum o carcinoma pulmonar de pequenas células (CPPC, com 41% dos casos. Em 10% dos doentes foi diagnosticado linfoma não Hodgkin. Em relação aos factores de prognóstico estudados, verificou-se que a ausência de metastização, o diagnóstico histológico de linfoma, o bom estado geral e a ausência de consumo tabágico se correlacionam positivamente de forma significativa com a sobrevivência. Contrariamente, o diagnóstico de CPPC apresentou igualmente de forma significativa uma menor sobrevivência. Conclusão: Nesta série de doentes com SVCS como apresentação da doença observou -se uma sobrevivência significativamente menor nos casos de CPPC, doentes fumadores (especialmente com ≥ 40 UMA, naqueles com mau estado geral, bem como nos que apresentavam uma maior progressão da doença, com presença de metastização.Superior vena cava syndrome (SVCS is characterised by gradual and insidious compression/obstruction of the superior vena cava (SVC. Upper chest and neck ingurgitation, plethoric face and oedema are the common symptoms/signs. It

Animal experimental study of safety for a self-made vena cava stent-filter

International Nuclear Information System (INIS)

Qin Dingwen; Shi Haibin; Liu Sheng; Li Linsun

2008-01-01

Objective: To evaluate the safety of a self-made vena cava stent-filter(VCSF)for prevention of pulmonary embolism. Methods: Fusiform unmhrella-like vena cava filter was made of Nitinol wires and stainless steel metal pole, and then ten mongrel dogs were implanted with these self-made filters and divided into 5 groups according to the different periods (2, 3, 4, 5 and 6 w) of filter placement, with 2 dogs in each group. After the VCSFs were placed in inferior vena cava via the right femoral vein approach, the dogs in each group were bred for 2-6 weeks, respectively. The blood flow of inferior vena cava and the position of the filters were inspected by inferior vena-cavography according to the indwelling periods. Finally the metal pole was retrieved via the femoral vein, leaving the VCSF as permanent venousz stent. The feasibility of retrieval and the free state of filter net with the adhering vascular wall were evaluated. Laparotomies were performed to remove the inferior vena cava from the animals for gross and electron microscopic examinations of the inferior vena cava intimal changes of the involved segment. Results: All 10 VCSFs were placed at the right positions of the dogs successfully. Angiography showed patent inferior vena cava without filter thrombosis at 2-6 weeks. There were no tilting and migration of the filter and all the metal poles were successfully retrieved. The superior and inferior extremities of filter nets could be set free with all the filters turning into venous stents. Postmortem displayed retroperitoneal hemorrhage and caval thrombosis. The barbs of the filters penetrated over the caval adventitial coat. Under electron microscope, a thin layer of neointima already covered the braiding net of VCSFs at 2 weeks after the deployment. The tunica intima became slightly thick at 3-4 weeks and with moderate proliferation at 5-6 weeks. Conclusions: The self-made vena cava stent-filter possesses rather long indwelling period according to the

In vivo evaluation of a new vena cava filter

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Gilberto do Nascimento Galego

2016-01-01

Full Text Available Abstract Background Pulmonary embolism is an important cause of cardiovascular death. Inferior vena cava filters have been shown to be effective for prevention of this condition. Objectives To determine the safety, performance and efficacy of a new inferior vena cava filter in an ovine model. Methods BKone1 filters are self-centering with over-the-wire deployment, have three filtering regions and are made from nickel-titanium alloy. Eight of these filters were implanted in 8 sheep. The sheep were divided into 4 groups of two animals (A and B and the number of clots injected differed by group. Two clots were injected in group 2, four in group 3, eight in group 4 and zero clots in group 1. A animals underwent euthanasia soon after the procedure and B animals were observed for 30 days and then euthanized after a control cavography. All inferior vena cavas were processed for histological examination. Clots were prepared in a metal mold, sectioned and then radiopaque markers were inserted. Clot capture was analyzed by identifying the radiopaque marker on fluoroscopy. Results No clot migration was observed during follow-up. Control cavographies showed patent inferior vena cavas. Pathological examination indicated little inflammatory tissue response. All clots were captured in the condition with 2 clots, only one clot was missed in the group injected with 4 clots and in the condition of 8 clots, they were partly captured. Conclusions The filters were deployed safely. There was a reduction in efficacy as the number of blood clots increased.

Diagnosis of tricuspid insufficiency by Doppler flowmetry in the inferior vena cava

International Nuclear Information System (INIS)

Smith, H.J.

1986-01-01

Eighty-five patients subjected to routine heart catheterization were examined with duplex scanning of the inferior vena cava. Adequate Doppler recordings and a right ventricular angiography were obtained in 79 of them. Tricuspid insufficiency was found to be present in 34 patients at angiography and in 24 at duplex examination. No false positive Doppler diagnoses of tricuspid insufficiency occurred. The possibility of false positive angiographic diagnoses is discussed. A high correlation was found between percentage reversed flow in the inferior vena cava during ventricular systole and degree of angiographic tricuspid insufficiency. It is concluded that duplex scanning of the inferior vena cava seems to be a good alternative to angiography in the diagnosis and quantification of tricuspid insufficiency. (orig.)

Tratamento endovascular da síndrome da veia cava superior: relato de caso e revisão da literatura Endovascular treatment of superior vena cava syndrome: case report and review of the literature

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Marco Aurélio Cardozo

2006-12-01

Full Text Available Relatamos o caso de uma paciente portadora de síndrome da veia cava superior sintomática de origem benigna tratada pela técnica endovascular. A angiorressonância magnética pré-angioplastia evidenciou extensa trombose do tronco braquiocefálico esquerdo, da veia subclávia esquerda e obstrução da veia cava superior junto ao tronco braquiocefálico direito. A paciente realizou mastectomia radical 2 anos antes, associada à quimioterapia e radioterapia do tórax. Foram realizados angioplastia venosa e implante de stent expansível por balão. O resultado foi satisfatório, com alívio imediato dos sintomas devido à recanalização da veia cava superior e do tronco braquiocefálico direito. Foi instituída anticoagulação oral. A paciente permanece sem recidiva dos sintomas após 8 meses de acompanhamento. O tratamento endovascular é uma alternativa terapêutica com baixa morbidade e resultado satisfatório a médio prazo que pode ser oferecida aos pacientes portadores de síndrome da veia cava superior.We report a case of a patient with symptomatic benign superior vena cava syndrome treated by the endovascular technique. The angiographic resonance before angioplasty showed extensive thrombosis of the left brachiocephalic trunk, left subclavian vein and superior vena cava obstruction close to the right brachiocephalic trunk. The patient underwent radical mastectomy 2 years ago with adjuvant chemotherapy and chest radiotherapy. Venous angioplasty and balloon-expandable stenting were performed. Satisfactory result was obtained with immediate relief of symptoms due to recanalization of the right brachiocephalic trunk and superior vena cava. Oral anticoagulation was initiated. The patient is still asymptomatic after 8 months of follow-up. The endovascular treatment is a therapeutic alternative with low morbidity and satisfactory mid-term results that can be offered to patients with superior vena cava syndrome.

Neuroimaging findings in neonates and infants from superior vena cava obstruction after cardiac operation

International Nuclear Information System (INIS)

Karmazyn, Boaz; Horev, Gadi; Kornreich, Liora; Dagan, Ovdi; Vidne, Bernado A.

2002-01-01

Extraventricular obstructive hydrocephalus may develop after superior vena cava obstruction, an uncommon complication after cardiac surgery.Objective. To describe the neuroimaging findings in neonates and infants with superior vena cava thrombosis after cardiac surgery for congenital heart disease.Materials and methods. Between 1993 and 2001, 333 neonates and infants in our hospital underwent cardiac surgery, of whom 13 (3.9%) subsequently acquired superior vena cava syndrome. Eleven of these 13 children (7 boys, 4 girls) were evaluated by head ultrasound and computed tomography scans.Results. One child had normal findings on head ultrasound, and 10 children had extraventricular obstructive hydrocephalus (EVOH). In 6 children, aggravation of the hydrocephalus was noted up to 11.4 months after cardiac surgery; in 3 of them, the hydrocephalus was shunted to the peritoneum. One child had thrombosis of the dural sinuses, and 1 had hemorrhagic infarction. Two children died during follow-up.Conclusion. EVOH is a common complication of superior vena cava thrombosis, and head ultrasound should be performed in all neonates and infants with superior vena cava thrombosis after cardiac surgery. Long-term follow-up is needed, as the hydrocephalus may worsen even months after surgery. (orig.)

Estudo comparativo da biocompatibilidade da submucosa intestinal porcina e pericárdio bovino usados como enxertos na veia cava de cães Comparative study of the biocompatibility of the porcine intestinal submucosa and bovine pericardium used as grafts in the inferior cava vein of dogs

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Fernando Hintz Greca

2005-08-01

Full Text Available OBJETIVO: Comparar a biocompatibilidade entre submucosa de intestino delgado (SID porcino e o pericárdio bovino como enxerto no reparo de lesões criadas na veia cava inferior de cães. MÉTODOS: Dezesseis cães foram submetidos a laparotomia. Após a abertura da cavidade abdominal a veia cava foi identificada e em seguida procedeu-se com a retirada de um segmento elíptico de 1,5X3cm de sua parede anterior. Em 8 animais o defeito foi reparado com SID porcino (grupo A e nos 8 animais restantes o defeito foi reparado com pericárdio bovino (grupo B.No 30° dia de P.O. realizou-se uma ultra-sonografia e a eutanásia foi realizada no 40°dia de pós-operatório. RESULTADOS: Observou-se estenose da veia cava em 1 cão do grupo do grupo A e em 2 animais do grupo B além de trombose em 1 cão desse mesmo grupo. A análise microscópica revelou um processo inflamatório crônico moderado em ambos os grupos. A endotelização do enxerto, regeneração de fibras musculares lisas e depósito de colágeno também foi similar nos 2 grupos estudados. CONCLUSÃO: A SID provou ser um excelente substrato para a regeneração vascular quando implantado em veia cava superior, contudo os resultados encontrados não diferem daqueles observados com o uso de pericárdio bovino.PURPOSE: To compare the biocompatibility of the bovine pericardium and the small intestine submucosa (SIS when used to repair a created defect in the inferior vena cava of dogs. METHODS: Sixteen male mongrel dogs were submitted to a midline laparotomy incision. An elliptical segment (1,5 X 3,0 cm of the inferior vena cava, below the renal veins, was excised. In 8 dogs, the A group, a patch of porcine small bowel submucosa was used to repair the defect. In the 8 remaining dogs, the B group, a bovine pericardium was implanted in the vena cava. On the 30th post-operative day an ultrasound was performed in order to identify stenosis. The euthanasia was accomplished in the 40th post-operative day

Portable Electronic Tongue Based on Microsensors for the Analysis of Cava Wines.

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Giménez-Gómez, Pablo; Escudé-Pujol, Roger; Capdevila, Fina; Puig-Pujol, Anna; Jiménez-Jorquera, Cecilia; Gutiérrez-Capitán, Manuel

2016-10-27

Cava is a quality sparkling wine produced in Spain. As a product with a designation of origin, Cava wine has to meet certain quality requirements throughout its production process; therefore, the analysis of several parameters is of great interest. In this work, a portable electronic tongue for the analysis of Cava wine is described. The system is comprised of compact and low-power-consumption electronic equipment and an array of microsensors formed by six ion-selective field effect transistors sensitive to pH, Na⁺, K⁺, Ca 2+ , Cl - , and CO₃ 2- , one conductivity sensor, one redox potential sensor, and two amperometric gold microelectrodes. This system, combined with chemometric tools, has been applied to the analysis of 78 Cava wine samples. Results demonstrate that the electronic tongue is able to classify the samples according to the aging time, with a percentage of correct prediction between 80% and 96%, by using linear discriminant analysis, as well as to quantify the total acidity, pH, volumetric alcoholic degree, potassium, conductivity, glycerol, and methanol parameters, with mean relative errors between 2.3% and 6.0%, by using partial least squares regressions.

Portable Electronic Tongue Based on Microsensors for the Analysis of Cava Wines

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Pablo Giménez-Gómez

2016-10-01

Full Text Available Cava is a quality sparkling wine produced in Spain. As a product with a designation of origin, Cava wine has to meet certain quality requirements throughout its production process; therefore, the analysis of several parameters is of great interest. In this work, a portable electronic tongue for the analysis of Cava wine is described. The system is comprised of compact and low-power-consumption electronic equipment and an array of microsensors formed by six ion-selective field effect transistors sensitive to pH, Na+, K+, Ca2+, Cl−, and CO32−, one conductivity sensor, one redox potential sensor, and two amperometric gold microelectrodes. This system, combined with chemometric tools, has been applied to the analysis of 78 Cava wine samples. Results demonstrate that the electronic tongue is able to classify the samples according to the aging time, with a percentage of correct prediction between 80% and 96%, by using linear discriminant analysis, as well as to quantify the total acidity, pH, volumetric alcoholic degree, potassium, conductivity, glycerol, and methanol parameters, with mean relative errors between 2.3% and 6.0%, by using partial least squares regressions.

Segmental variants of the inferior vena cava - typical findings correlated with embryological development for differential diagnosis; Segmentale Varianten der Vena cava inferior - Erscheinungsbild mit embryologischer Korrelation in Abgrenzung zum sekundaeren Vena-cava-Verschluss

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Meyer, D.R. [Abt. fuer Radiologie, Guestrower Krankenhaus, Akademisches Lehrkrankenhaus der Univ. Rostock (Germany); Inst. fuer Radiologie und Nuklearmedizin, Krankenhaus am Urban, Akademisches Lehrkrankenhaus der Freien Univ. Berlin (Germany); Huggle, H.; Hueppe, T.; Friedrich, M. [Inst. fuer Radiologie und Nuklearmedizin, Krankenhaus am Urban, Akademisches Lehrkrankenhaus der Freien Univ. Berlin (Germany); Andresen, R. [Abt. fuer Radiologie, Guestrower Krankenhaus, Akademisches Lehrkrankenhaus der Univ. Rostock (Germany)

2001-07-01

The vast variability of the overall rare congenital anomalies of the inferior vena cava (IVC) are mostly detected by accident through different imaging modalities. These cannot be classed as pathological findings, and should not be confused with lymphomas and has to differ from secondary collateral venous pathways. Based on 656 CT examinations 10.5% known forms of IVC anomalies were found. According to the embryological development three main groups of IVC variants could be nosologically classified: agenesis of the suprarenal IVC, anomalies of the pars renalis and anomalies of the infrarenal IVC. Additionally three unusual anomaly complexes were found. For the understanding details of the embryology based on a simplified depiction are presented. (orig.) [German] Die grosse Variabilitaet der als insgesamt selten anzusehenden angeborenen Venenanomalien der Vena cava inferior werden meist zufaellig durch verschiedene bildgebende Untersuchungsverfahren entdeckt. Diese koennen nicht als Pathologien des venoesen Systems klassifiziert werden und sollten nicht mit Lymphomen oder sekundaeren venoesen Kollateralen verwechselt werden. Basierend auf 656 CT-Untersuchungen fanden sich insgesamt 10,5% an bekannten Vena cava inferior (VCI) Anomalien. Unter Beruecksichtigung der embryologischen Entwicklung konnten drei Hauptgruppen an VCI-Varianten nosologisch differenziert werden: Agenesie der suprarenalen VCI, Anomalien der Pars renalis und Anomalien der infrarenalen VCI. Zusaetzlich fanden sich drei ungewoehnliche Anomaliekomplexe. Fuer das Verstaendnis der VCI-Varianten wird eine schematisierte Embryologie praesentiert. (orig.)

Tromboembolia pulmonar asociada al síndrome de la vena cava superior de origen trombótico

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Ana Madeleine Barrera-López

2017-07-01

Full Text Available Se describe el caso de un paciente masculino de 32 años de edad, quien consulta al servicio de urgencias con historia clínica del síndrome de la vena cava superior, en el estudio de la angiotomografía pulmonar, se demuestra embolismo pulmonar izquierdo, trombosis de la vena yugular interna derecha y confluente yugulo subclavio. No hay evidencia de asociación con neoplasia, infecciones o enfermedades del tejido conectivo, siendo el único factor de riesgo asociado para la trombosis, hiperviscocidad (tríada de virchow por poliglobulia.

Exploiting biological activities of brown seaweed Ecklonia cava for potential industrial applications: a review.

Science.gov (United States)

Wijesinghe, W A J P; Jeon, You-Jin

2012-03-01

Seaweeds are rich in vitamins, minerals, dietary fibres, proteins, polysaccharides and various functional polyphenols. Many researchers have focused on brown algae as a potential source of bioactive materials in the past few decades. Ecklonia cava is a brown seaweed that is abundant in the subtidal regions of Jeju Island in the Republic of Korea. This seaweed attracted extensive interest due to its multiple biological activities. E. cava has been identified as a potential producer of wide spectrum of natural substances such as carotenoids, fucoidans and phlorotannins showing different biological activities in vital industrial applications including pharmaceutical, nutraceutical, cosmeceutical and functional food. This review focuses on biological activities of the brown seaweed E. cava based on latest research results, including antioxidant, anticoagulative, antimicrobial, antihuman immunodeficiency virus, anti-inflammatory, immunomodulatory, antimutagenic, antitumour and anticancer effects. The facts summarized here may provide novel insights into the functions of E. cava and its derivatives and potentially enable their use as functional ingredients in potential industrial applications.

Ecklonia cava Extract and Dieckol Attenuate Cellular Lipid Peroxidation in Keratinocytes Exposed to PM10.

Science.gov (United States)

Lee, Jeong-Won; Seok, Jin Kyung; Boo, Yong Chool

2018-01-01

Airborne particulate matter can cause oxidative stress, inflammation, and premature skin aging. Marine plants such as Ecklonia cava Kjellman contain high amounts of polyphenolic antioxidants. The purpose of this study was to examine the antioxidative effects of E. cava extract in cultured keratinocytes exposed to airborne particulate matter with a diameter of <10  μ m (PM10). After the exposure of cultured HaCaT keratinocytes to PM10 in the absence and presence of E. cava extract and its constituents, cell viability and cellular lipid peroxidation were assessed. The effects of eckol and dieckol on cellular lipid peroxidation and cytokine expression were examined in human epidermal keratinocytes exposed to PM10. The total phenolic content of E. cava extract was the highest among the 50 marine plant extracts examined. The exposure of HaCaT cells to PM10 decreased cell viability and increased lipid peroxidation. The PM10-induced cellular lipid peroxidation was attenuated by E. cava extract and its ethyl acetate fraction. Dieckol more effectively attenuated cellular lipid peroxidation than eckol in both HaCaT cells and human epidermal keratinocytes. Dieckol and eckol attenuated the expression of inflammatory cytokines such as tumor necrosis factor- (TNF-) α , interleukin- (IL-) 1 β , IL-6, and IL-8 in human epidermal keratinocytes stimulated with PM10. This study suggested that the polyphenolic constituents of E. cava , such as dieckol, attenuated the oxidative and inflammatory reactions in skin cells exposed to airborne particulate matter.

Congenital inferior vena cava anomalies: a review of findings at multidetector computed tomography and magnetic resonance imaging

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Catherine Yang

2013-07-01

Full Text Available Inferior vena cava anomalies are rare, occurring in up to 8.7% of the population, as left renal vein anomalies are considered. The inferior vena cava develops from the sixth to the eighth gestational weeks, originating from three paired embryonic veins, namely the subcardinal, supracardinal and postcardinal veins. This complex ontogenesis of the inferior vena cava, with multiple anastomoses between the pairs of embryonic veins, leads to a number of anatomic variations in the venous return from the abdomen and lower limbs. Some of such variations have significant clinical and surgical implications related to other cardiovascular anomalies and in some cases associated with venous thrombosis of lower limbs, particularly in young adults. The authors reviewed images of ten patients with inferior vena cava anomalies, three of them with deep venous thrombosis. The authors highlight the major findings of inferior vena cava anomalies at multidetector computed tomography and magnetic resonance imaging, correlating them the embryonic development and demonstrating the main alternative pathways for venous drainage. The knowledge on the inferior vena cava anomalies is critical in the assessment of abdominal images to avoid misdiagnosis and to indicate the possibility of associated anomalies, besides clinical and surgical implications.

Congenital inferior vena cava anomalies: a review of findings at multidetector computed tomography and magnetic resonance imaging

International Nuclear Information System (INIS)

Yang, Catherine; Trad, Clovis Simao; Trad, Henrique Simao

2013-01-01

Inferior vena cava anomalies are rare, occurring in up to 8.7% of the population, as left renal vein anomalies are considered. The inferior vena cava develops from the sixth to the eighth gestational weeks, originating from three paired embryonic veins, namely the subcardinal, supracardinal and postcardinal veins. This complex ontogenesis of the inferior vena cava, with multiple anastomoses between the pairs of embryonic veins, leads to a number of anatomic variations in the venous return from the abdomen and lower limbs. Some of such variations have significant clinical and surgical implications related to other cardiovascular anomalies and in some cases associated with venous thrombosis of lower limbs, particularly in young adults. The authors reviewed images of ten patients with inferior vena cava anomalies, three of them with deep venous thrombosis. The authors highlight the major findings of inferior vena cava anomalies at multidetector computed tomography and magnetic resonance imaging, correlating them the embryonic development and demonstrating the main alternative pathways for venous drainage. The knowledge on the inferior vena cava anomalies is critical in the assessment of abdominal images to avoid misdiagnosis and to indicate the possibility of associated anomalies, besides clinical and surgical implications. (author)

Congenital inferior vena cava anomalies: a review of findings at multidetector computed tomography and magnetic resonance imaging

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Yang, Catherine; Trad, Clovis Simao [Central de Diagnostico Ribeirao Preto (CEDIRP), SP (Brazil); Trad, Henrique Simao, E-mail: hstrad@terra.com.br [Central de Diagnostico Ribeirao Preto (CEDIRP), SP (Brazil); Universidade de Sao Paulo (HC-FMRPUSP), Ribeirao Preto, SP (Brazil). Fac. de Medicina. Hospital das Clinicas; Mendonca, Silvana Machado [Clinica de Diagnostico por Imagem (CDPI), Rio de Janeiro, RJ (Brazil)

2013-06-15

Inferior vena cava anomalies are rare, occurring in up to 8.7% of the population, as left renal vein anomalies are considered. The inferior vena cava develops from the sixth to the eighth gestational weeks, originating from three paired embryonic veins, namely the subcardinal, supracardinal and postcardinal veins. This complex ontogenesis of the inferior vena cava, with multiple anastomoses between the pairs of embryonic veins, leads to a number of anatomic variations in the venous return from the abdomen and lower limbs. Some of such variations have significant clinical and surgical implications related to other cardiovascular anomalies and in some cases associated with venous thrombosis of lower limbs, particularly in young adults. The authors reviewed images of ten patients with inferior vena cava anomalies, three of them with deep venous thrombosis. The authors highlight the major findings of inferior vena cava anomalies at multidetector computed tomography and magnetic resonance imaging, correlating them the embryonic development and demonstrating the main alternative pathways for venous drainage. The knowledge on the inferior vena cava anomalies is critical in the assessment of abdominal images to avoid misdiagnosis and to indicate the possibility of associated anomalies, besides clinical and surgical implications. (author)

Interrupted inferior vena cava with hemiazygos continuation in an adult with a persistent left superior vena cava and left single coronary artery: A case report

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Kim, Yeo Jin; Kwon, Se Hwan; Ahn, Sung Eun; Kim, Soo Joong; Oh, Joo Hyeong [College of Medicine, Kyung Hee University, Seoul (Korea, Republic of); Shin, Jong Soo [Dept. of Radiology, Kyung Hee University Hospital at Gangdong, Seoul (Korea, Republic of)

2016-06-15

A 50-year-old woman was referred to our institution for medical screening due to an incidental finding on abdominal ultrasonography. She underwent chest, abdomen and cardiac multi-detector computed tomography (MDCT). Her MDCT revealed absence of the hepatic segment of the inferior vena cava (IVC), with hemiazygos continuation and a left single coronary artery. The dilated hemiazygos vein drained directly into the persistent left superior vena cava (SVC). Herein, we reported a very rare case combining an incidentally found interrupted IVC with hemiazygos vein continuation, persistent left SVC and a left single coronary artery diagnosed by MDCT.

Radiological evidence of double inferior vena cava in a young adult male

International Nuclear Information System (INIS)

Nevruz, O.; Ural, U.; Kirici, Y.; Kilic, C.; Bozlar, U.

2007-01-01

The development of the inferior vena cava IVC is a complex process comprising the formation and regression of some anastomoses, so various anomalies may occur during embryogenesis. These variations can increase the difficulty of aneurysm resection as well as the risk of venous injury and subsequent excessive bleeding during retroperitoneal and thoracic surgical interventions. Here, we report a patient with double inferior vena cava by radiographically during his investigation for the etiology of pancytopenia. (author)

Congenital anomalies of the inferior vena cava: importance of multiplanar imaging methods: an iconographic essay; Anomalias congenitas da veia cava inferior: valor dos metodos multiplanares em seu diagnostico - ensaio iconografico

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Viana, Sergio Lopes; Mendonca, Jose Luiz Furtado de; Freitas, Flavia Mendes Oliveira [Clinica Radiologica Vila Rica, Brasilia, DF (Brazil)] (and others). E-mail: radiolog@uol.com.br

2006-10-15

The inferior vena cava is the result of a complex embryologic process which takes place between 6 and 8 weeks of intra-uterine life. Several variations can occur during this process, and a defective embryogenesis of this vessel may lead to the development of anatomic variants. Although many of these variants are asymptomatic, the radiologist should be aware of them and of the potential medico-legal issues involved, especially in cases in which abdominal surgery or hemodynamic procedures are contemplated. In this paper, the major congenital anomalies involving the inferior vena cava are reviewed under the form of a pictorial essay, highlighting the role of the multiplanar imaging methods (volumetric computed tomography and magnetic resonance imaging) in their diagnosis. Keywords: Congenital variations; Inferior vena cava; Renal veins; Computed tomography; Magnetic resonance imaging. author)

Computed tomographic diagnosis of calcified inferior vena cava thrombus in a child with Wilm's tumor

Energy Technology Data Exchange (ETDEWEB)

Kirks, D R; Ponzi, J W; Korobkin, M

1980-01-01

A calcified thrombus in the inferior vena cava of infants and children may be imaged by computed tomography. The precise location of the calcification within the inferior vena cava may be confirmed by computed tomographic scanning during injection of intravenous contrast material.

Detection by means of CT of inferior vena cava filters

International Nuclear Information System (INIS)

Zurera Tendero, L.J.; Canis Lopez, M.; Oteros Fernandez, R.; Ramos Gomez, M.; Garcia Revillo, J.; Roman Rios, G.

1995-01-01

Vena cava filters are an excellent tool for the prevention of pulmonary embolism (PE) in patients with deep vein thrombosis (DVT) of the lower limbs. However, these devices are not entirely free of complications as thrombi can develop inside them, threatening to occlude them completely. The objective of this report is to study the incidence of thrombosis in vena cava filters, as well as their impact on prognosis. We also mention the importance of CT as an imaging technique in the study of this complication. We present 30 patients in whom different filters were implanted and their prospective follow-up by means of CT over a mean follow-up period of 36 months. Chi-square analysis was used to determine whether there was a significant relationship among the complications encountered (p<0,05), and their course over time was studied by means of Kaplan-Meyer curves. Five cases (16%) of complete thrombosis of the filter were observed among patients in whom the Gunther model had been implanted, yielding an index of probability of complete permeability of the inferior vena cava at 13 months of 82%. Thrombi of different degrees (between 5% and 60%) were also observed inside the filter in ten patients (33%) with Gunther, Simon-Nitional and LGM models. Filter thrombosis was not significantly associated with the onset of recurrent PE or of venous disorders involving lower limbs, the relationship between PE and preimplantation presence of inferior vena cava thrombosis was significant (p<0.01). It was also observed that post implantation anti coagulation did not significantly prevent later onset of filter thrombosis. (Author)

Study of 99Tcm-annexin V distribution in inferior vena cava thrombus models of rabbits

International Nuclear Information System (INIS)

Wu Dayong; Zhang Wenyan; Bian Yanzhu; Hu Yujing

2013-01-01

To study 99 Tc m -Annexin V distribution in inferior vena cava thrombus models of rabbits and uptake of 99 Tc m -Annexin V in fresh and old venous thrombus. Rabbits (n=15) were randomly grouped into 3 groups (the fresh thrombus group, old thrombus group, and control group). The rabbits of two thrombus groups developed inferior vena cava thrombus models by operations. The control group received sham operation. The fresh thrombus group and control group rabbits were injected 99 Tc m -Annexin V after operating 1 d; the old thrombus group 14 d. After 1 h all rabbits were killed by injecting overdose pentobarbital sodium. The thrombus (or the inferior vena cava about 3 cm below inferior pole of right kidney level in the control group rabbits), blood, thrombus area inferior vena cava, head lateral inferior vena cava (except the control group), thigh muscle, stomach, myocardium, pulmonary, liver, kidney, spleen, bone and small intestine were obtained from all group rabbits. The ex tissue and blood were weighed and measured by a Well-type detector. The percentage of the injected dose per gram of ex tissue (or blood) was calculated by the above data. The thrombus to blood, thrombus area inferior vena cava, head lateral inferior vena cava and thigh muscle ratios were calculated by percentage of the injected dose per gram of ex tissue (or blood). The test was used to compare the fresh thrombus group and old thrombus group by SPSS 17.0. The percentage of' the injected dose per gram of thrombi (0.01894± 0.002 16% ID/g) in the fresh thrombus group was higher than the old thrombus group (0.00473±0.001 28% ID/g), P<0.05. The thrombus to blood, thrombus area inferior vena cava, head lateral inferior vena cava and muscle ratios (3.42±1.06, 26.32±13.60, 31.23 ±16.00, 111.62±52.23) in the fresh thrombus group were higher than the old thrombus group (0.98±0.09, 5.12±2.01, 6.25±2.38, 21.82±5.93), P<0.05 for all. All the thrombi of the fresh thrombus group were confirmed

The Edible Brown Seaweed Ecklonia cava Reduces Hypersensitivity in Postoperative and Neuropathic Pain Models in Rats

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Jae Goo Kim

2014-06-01

Full Text Available The current study was designed to investigate whether edible brown seaweed Ecklonia cava extracts exhibits analgesic effects in plantar incision and spared nerve injury (SNI rats. To evaluate pain-related behavior, we performed the mechanical withdrawal threshold (MWT and thermal hypersensitivity tests measured by von Frey filaments and a hot/cold plate analgesia meter. Pain-related behavior was also determined through analysis of ultrasonic vocalization. The results of experiments showed MWT values of the group that was treated with E. cava extracts by 300 mg/kg significantly increased; on the contrary, number of ultrasonic distress vocalization of the treated group was reduced at 6 h and 24 h after plantar incision operation (62.8%, p < 0.05. Moreover, E. cava 300 mg/kg treated group increased the paw withdrawal latency in hot-and cold-plate tests in the plantar incision rats. After 15 days of continuous treatment with E. cava extracts at 300 mg/kg, the treated group showed significantly alleviated SNI-induced hypersensitivity response by MWT compared with the control group. In conclusion, these results suggest that E. cava extracts have potential analgesic effects in the case of postoperative pain and neuropathic pain in rats.

ANÁLISE, MODELAGEM E IMPRESSÃO 3D DE UM FRAME PARA VANTs DO TIPO QUADRÍCOPTEROS PARA VOOS EM AMBIENTE INDOOR

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Rafael Rocha Gomes

2017-01-01

Full Text Available O foco do projeto de pesquisa foi analisar, modelar e construir utilizando uma impressora 3D, um frame de um Veículo Aéreo Não Tripulado (VANT para voos em ambiente indoor. Esta aeronave será usada para experimentos laboratoriais, que exijam características especiais para ambientes indoor e de pesquisa, tais como, ser compacto, leve e uma estrutura que minimize os riscos aos operadores, pois dividirá espaço com pessoas. A motivação desta pesquisa se deu pelo fato dos frames disponíveis no mercado serem voltados para voos outdoor, como por exemplo, os utilizados para monitoramento. Com o intuito de proporcionar uma solução de aeronave para espaço laboratorial indoor, a proposta deste trabalho foi de modelar e imprimir em 3D um protótipo de frame que atenda todos os requisitos necessários para este tipo de voo.

Vena cava filters and thrombolytic therapeutic monitoring based on functional near-infrared spectroscopy for deep vein thrombosis

Science.gov (United States)

Pan, Boan; Liu, Weichao; Fang, Xiang; Zhao, Ke; Li, Ting

2018-02-01

Deep vein thrombosis (DVT), happening in inpatients usually and especially with the postoperative population, is a serious disease characterized by an increased incidence. The venography is the golden standard to diagnose DVT. However, it involves invasive contrast agent injection and give patients physical and mental pressure. Functional nearinfrared spectroscopy (fNIRS) has been reported recently to diagnose DVT. Thrombolytic therapy activates the dissolution system with an exogenous activator that dissolves coronary thrombosis. The vena cava filter is a medical filter used for the treatment of thrombosis and the prevention of pulmonary embolism. Here we attempt to use portable NIRS for the DVT monitoring in the whole process of vena cava filter implantation and thrombolytic treatment, and contrast the patients of untreated, vena cava filter implantation and thrombolytic treatment. 19 DVT patients and 12 normal subjects were recruited. Thereinto, 7 patients have taken vena cava filter implantation, and 6 patients have taken the thrombolytic treatment. It was found that deoxyhemoglobins (Δ[Hb]) fluctuates and even increases in DVT. After vena cava filter implantation, Δ[Hb] increases first, then decreases. However, it emerges the rising trend and converge to the curves of normal subjects in thrombolytic treatment. The oxyhemoglobins (Δ[HbO2]) emerges opposite trend in most paradigms. The findings reveal the potential of fNIRS for monitoring DVT and therapeutic effect evaluation of thrombolysis and vena cava filters.

Correlação entre os índices dopplervelocimétricos da veia cava inferior e ducto venoso e a concentração de hemoglobina do cordão em fetos de gestantes isoimunizadas

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Taveira Marcos Roberto

2003-01-01

Full Text Available OBJETIVO: o objetivo principal desse estudo foi verificar se existe correlação entre os índices dopplervelocimétricos da veia cava inferior e do ducto venoso e a concentração sérica da hemoglobina fetal. MÉTODOS: estudo transversal e prospectivo, realizado entre janeiro de 1998 e junho de 2001. Foram acompanhadas 31 gestantes isoimunizadas com resultado do teste de Coombs indireto maior que 1:8, que foram submetidas à pesquisa de hemólise fetal. Quando foram indicadas as transfusões intra-uterinas intravasculares, a hemoglobina do cordão foi dosada no início do procedimento. Nos demais casos, a hemoglobina do cordão foi mensurada no momento do parto, sempre por cesariana eletiva. Obteve-se um total de 74 procedimentos estudados, definidos como sendo cada transfusão intra-uterina precedida pela dopplervelocimetria venosa. A mensuração da concentração da hemoglobina fetal foi realizada no Hemocue® (B-Hemoglobin Photometer Hemocue AB; Angelholm, Sweden, dispositivo usado para a determinação quantitativa de hemoglobina no sangue. A dopplervelocimetria da cava inferior e do ducto venoso foi realizada antecedendo a coleta do sangue fetal, sempre em intervalo de tempo inferior a 24 horas. Os índices dopplervelocimétricos estudados foram o índice de pulsatilidade para veias (IPV, o índice do pico de velocidade para veias (IPVV e a relação entre o pico de velocidade durante a fase de contração atrial e o pico de velocidade na sístole ventricular (relação CA/SV ou índice de pré-carga, na veia cava inferior, e o IPV, IPVV e a relação entre os picos de velocidade da sístole ventricular e da contração atrial (relação SV/CA, no ducto venoso. Foi realizado estudo de correlação entre a dopplervelocimetria da veia cava inferior e do ducto venoso e a hemoglobina do cordão, pela técnica de regressão linear simples. Realizou-se também estudo de associação entre os índices dopplervelocimétricos do compartimento

The clinical application of the implantation of retrievable filters in superior vena cava

International Nuclear Information System (INIS)

Tian Yulong; Zhang Xitong; Hong Duo

2011-01-01

Objective: To investigate the safety of the placement of Tulip retrievable filter in superior vena cava and to discuss the prevention of pulmonary embolism (PE). Methods: Implantation of Tulip retrievable filter in superior vena cava was performed in ten patients (6 males and 4 females, aged 42-60 years) with acute or subacute deep venous thrombosis in upper extremity or cephalo-cervical region. After the placement of filter, the local via-catheter thrombolysis was conducted. The clinical results, such as the improvement of venous obstructed symptoms at upper extremity or cephalo-cervical region, were recorded. The filter's shape and location were checked. The possible occurrence of pulmonary embolism was observed. Results: The filter was successfully implanted in supper vena cava in all patients, and the deep venous thrombosis at upper extremity and cephalo-cervical region responded well to the local via-catheter thrombolysis. The filters showed no displacement or tilting. The swelling at upper extremity and cephalo-cervical region was markedly faded away. No symptomatic pulmonary embolism occurred. the filter was successfully retrieved via the femoral vein in four patients. Conclusion: Tulip filter can be safety implanted in superior vena cava and can be smoothly retrieved. The occurrence of pulmonary embolism can be effectively prevented if corresponding local via-catheter thrombolysis is carried out. (authors)

Percutaneous transfemoral placement of inferior vena cava filter to prevent pulmonary embolism in patients with malignant tumor

International Nuclear Information System (INIS)

Hu Baoshan; Li Yong; Luo Pengfei

2005-01-01

Objective: To evaluate the effectiveness and safety of inserting an inferior vena cava filter to prevent the pulmonary embolism (PE) due to detachment of the thrombus in the lower extremities. Methods: Inferior vena cava filter were placed in 37 patients with malignant tumor and deep venous thrombosis from 1998 to 2004. Malignancy was confirmed by pathological or cellular biological examination in all cases. The episode of pulmonary embolism was monitored during a post-intervention follow-up. Results: All the filters were placed in the inferior vena cava safely via a percutaneous femoral venous access. No serious complications such as pulmonary embolism occurred during the follow-up periods. Conclusion: The inferior vena cava filter placement is an effective and safe procedure in preventing the pulmonary embolism in patients with malignant tumor and deep venous thrombosis. (authors)

GENERACIÓN DE MALLAS NO ESTRUCTURADAS PARA LA IMPLEMENTACION DE MODELOS NUMÉRICOS

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FRANCISCO GARCÍA

2009-01-01

Full Text Available Se usó una herramienta numérica para la generación automática de mallas no estructuradas en la implementación del método de los elementos finitos. Las mallas generadas son usadas en el desarrollo de modelos numéricos dos dimensionales (2-D en la simulación de fenómenos oceánicos. Para ello, se desarrolló un paquete en Matlab basado en el refinamiento triangular no estructurado de Delaunay, complementado por un conjunto de utilidades para chequear y mejorar la calidad de la malla.

Computed tomographic characteristics of collateral venous pathways in dogs with caudal vena cava obstruction.

Science.gov (United States)

Specchi, Swan; d'Anjou, Marc-André; Carmel, Eric Norman; Bertolini, Giovanna

2014-01-01

Collateral venous pathways develop in dogs with obstruction or increased blood flow resistance at any level of the caudal vena cava in order to maintain venous drainage to the right atrium. The purpose of this retrospective study was to describe the sites, causes of obstruction, and configurations of venous collateral pathways for a group of dogs with caudal vena cava obstruction. Computed tomography databases from two veterinary hospitals were searched for dogs with a diagnosis of caudal vena cava obstruction and multidetector row computed tomographic angiographic (CTA) scans that included the entire caudal vena cava. Images for each included dog were retrieved and collateral venous pathways were characterized using image postprocessing and a classification system previously reported for humans. A total of nine dogs met inclusion criteria and four major collateral venous pathways were identified: deep (n = 2), portal (n = 2), intermediate (n = 7), and superficial (n = 5). More than one collateral venous pathway was present in 5 dogs. An alternative pathway consisting of renal subcapsular collateral veins, arising mainly from the caudal pole of both kidneys, was found in three dogs. In conclusion, findings indicated that collateral venous pathway patterns similar to those described in humans are also present in dogs with caudal vena cava obstruction. These collateral pathways need to be distinguished from other vascular anomalies in dogs. Postprocessing of multidetector-row CTA images allowed delineation of the course of these complicated venous pathways and may be a helpful adjunct for treatment planning in future cases. © 2014 American College of Veterinary Radiology.

Vessel wall reaction after vena cava filter placement

NARCIS (Netherlands)

Hoekstra, A; Elstrodt, JM; Nikkels, PGJ; Tiebosch, ATMG

2002-01-01

Purpose: To evaluate the interaction between the Cordis Keeper vena caval filter and vessel wall in a porcine model. Methods: Implantation of the filter was performed in five pigs. Radiologic data concerning inferior vena cava (IVC) diameter and filter patency, filter leg span, and stability were

Thrombosis of the ileo-caval sector: puerperal thrombosis and agenesia thrombosis of the inferior vena cava

International Nuclear Information System (INIS)

Garcia Egea, Jorge; Lara Guerrero, Isabel; Fustero Aznar, Jose Miguel; Hermoso Cuenca, Vicente; Velez Lomana, Abel

2011-01-01

The thrombosis of the inferior vena cava account for around the 15% of the cases of deep venous thrombosis. This is the case of a puerperal primigravida with a cesarean section labor presenting with a thrombosis initially in the right ovarian vein and then extension to the inferior vena cava. Treatment included low molecular weight heparin in anticoagulant doses; rest with elevation of the extremities and elastic bandage. After a satisfactory process evolution with partial lysis of the thrombus, the oral anticoagulation with Acenocumarol for 6 months was started. The second patient, a man aged 73 with backgrounds of an operated hepatic hydatidosis, had a thrombosis of the infrarenal inferior vena cava and agenesia of retrohepatic segment of the inferior vena cava. The patient remains with anticoagulant treatment including Acenocumarol, elastic bandage and hygienic care. As sequela he had a postphlebitic syndrome and reworsening of the edema leading to its admission in two occasions.(author)

Síndrome de veia cava superior Superior vena cava syndrome

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SAMUEL ZUÍNGLIO DE BIASI CORDEIRO

2002-09-01

Full Text Available A obstrução ao fluxo sanguíneo na VCS e suas manifestações clínicas têm hoje como causa principal o câncer de pulmão. A história relata que no século XVIII a sífilis e a tuberculose eram responsáveis por 40% dos casos conhecidos. O conhecimento das alterações hemodinâmicas compreendidas nesta síndrome assim como a apuração das técnicas de diagnóstico de imagem e de citopatologia permitem hoje que o médico possa tratar de seu paciente com mais segurança e conforto do que há 10 anos. A TC contrastada e a RM auxiliam no diagnóstico de localização da obstrução e técnicas mais antigas como a cavografia puderam ser abandonadas. O diagnóstico de obstrução da VCS e o estudo por Doppler realizado à beira do leito em muito contribuem para a realização de procedimentos de desobstrução como a angioplastia transluminal percutânea nos casos de trombose ou estenose do vaso. Também a utilização de próteses como PTFE é de importância fundamental na condução de casos de lesão traumática da VCS durante cirurgias para câncer pulmonar ou mediastinal. No campo da radioterapia, a técnica de fracionamento permite que altas doses de irradiação sejam administradas aos pacientes portadores de neoplasias malignas, com benefícios em 70% dos casos.Lung cancer is now the main cause of blood flow obstruction in the superior vena cava and of its clinical manifestations. History tells that in the 18th Century, syphilis and tuberculosis were responsible for 40% of the known cases. The knowledge of hemodynamic changes seen in this syndrome and the improvement of diagnostic and cytopathologic techniques allow for a safer and more comfortable treatment of the patient than 10 years ago. Contrast CT and MR added to the identification and location of the obstruction, and older techniques such as cavography could be abandoned. SVC obstruction diagnosis and Doppler studies carried out at the bed of the patient contribute to

TrapEase inferior vena cava filter placement: use of the subclavian vein.

Science.gov (United States)

Stone, Patrick A; Aburahma, Ali F; Hass, Stephen M; Hofeldt, Matthew J; Zimmerman, William B; Deel, John T; Deluca, John A

2004-01-01

The purpose of this paper was to evaluate the safety and technical success of TrapEase inferior vena cava filter placement via the subclavian vein. As of yet, no reports in the literature have specifically investigated the use of the subclavian vein as a route for deploying TrapEase vena cava filters. Retrospective chart review was conducted of 135 patients with attempted TrapEase inferior vena cava filter placement over a 2-year period. In a majority of cases, the choice of subclavian vein approach was based primarily on surgeon preference. Other circumstances for subclavian vein deployment included cervical immobilization secondary to trauma, desire for concomitant placement of a subclavian long-term central venous access catheter, and patient body habitus limiting exposure to the internal jugular vein. One hundred and thirty-five filters were placed over this 2-year period. The internal jugular vein approach was used in 56 patients, the femoral vein approach in 39 patients, and the subclavian vein approach in 40 patients. Thirty-nine of the 40 TrapEase filter placements using the subclavian vein were successful. Twenty-six were deployed through the right subclavian vein and 14 through the left subclavian vein. The single failed subclavian deployment was due to the inability to pass the guidewire adequately into the inferior vena cava after successful cannulation of the right subclavian vein. The average deployment time for subclavian vein placement was 26 minutes when TrapEase filter placement was the only procedure performed. No insertional complications were encountered, specifically no pneumothoraces confirmed by chest radiography or fluoroscopy. The subclavian vein provides an alternative site of access for the TrapEase inferior vena cava filter. This route is comparable to other alternative methods evaluated both in average deployment time and complication occurrence. Furthermore, the subclavian vein route is valuable in patients with limited central access

Reconstruction of a total avulsion of the hepatic veins and the suprahepatic inferior vena cava secondary to blunt thoracoabdominal trauma.

Science.gov (United States)

Kaemmerer, Daniel; Daffner, Wolfgang; Niwa, Martin; Kuntze, Thomas; Hommann, Merten

2011-02-01

Blunt injury to the inferior vena cava is a rare but dramatic event having a high mortality up to 80%. The mortality increases after total avulsion especially in combination with secondary intra-abdominal injuries. We report on a 15-year-old boy who sustained a blunt trauma with a total, partially covered avulsion of the hepatic veins and the suprahepatic inferior vena cava. We treated the patient under internal bypassing of the retrohepatic vena cava by using the heart-lung machine and reconstructed the hepatic veins and suprahepatic vena cava with a conduit made of pericard.

Hepatic vena cava syndrome: New concept of pathogenesis.

Science.gov (United States)

Shrestha, Santosh Man; Kage, Masayoshi; Lee, Byung Boong

2017-06-01

Hepatic vena cava syndrome, also known as membranous obstruction of inferior vena cava (IVC), was considered a rare congenital disease and classified under Budd-Chiari syndrome. It is now recognized as a bacterial infection-induced disease related to poor hygiene. Localized thrombophlebitis of the IVC at the site close to hepatic vein outlets is the initial lesion which converts on resolution into stenosis or complete obstruction, the circulatory equilibrium being maintained by development of cavo-caval collateral anastomosis. These changes persist for the rest of the patient's life. The patient remains asymptomatic for a variable period until acute exacerbations occur, precipitated by bacterial infection, resulting in deposition of thrombi at the site of the lesion and endophlebitis in intrahepatic veins. Large thrombus close to hepatic vein outlets results in ascites from hepatic venous outflow obstruction, which is followed by development of venocentric cirrhosis. Endophlebitis of intrahepatic veins results in ischemic liver damage and development of segmental stenosis or membrane. Acute exacerbations are recognized clinically as intermittent jaundice and/or elevation of aminotransferase or ascites associated with neutrophil leukocytosis and elevation of C-reactive protein; sonologically, they are recognized as the presence of thrombi of different ages in IVC and thrombosis of intrahepatic veins. Development of liver cirrhosis and hepatocellular carcinoma is related to severity or frequency of acute exacerbations and not to duration or type of caval obstruction. Hepatic vena cava syndrome is a common co-morbid condition with other liver diseases in developing countries and it should be considered in differential diagnosis in patient with intermittent elevation serum bilirubin and or aminotransferase or development of ascites and cirrhosis. © 2017 The Japan Society of Hepatology.

Right to left shunt as a collateral circulation in a patient with superior vena cava syndrome: a case report

International Nuclear Information System (INIS)

Kim, Young Sun; Jeon, Seok Chol; Moon, Won Jin; Choi, Yo Won; Seo, Heung Suk; Hahm, Chang Kok; Park, Choong Ki

1999-01-01

In patients with superior vena cava syndrome, the form of the collateral circulatory system which communicates with the inferior vena cava via various systemic veins usually varics. We found an instance of unusual collateral circulation : direct communication between the systemic and pulmonary vein in a woman with superior vena cava syndrome caused by metastatic lymph node enlargement. In this report, we describe the CT and radionuclide venographic findings

Partial anomalous pulmonary venous connection to the superior vena cava.

Science.gov (United States)

Aramendi, José I; Rey, Estibaliz; Hamzeh, Gadah; Crespo, Alejandro; Luis, Maite; Voces, Roberto

2011-04-01

We describe the surgical technique of reimplantation of the right superior pulmonary vein into the left atrium in 2 patients with partial anomalous pulmonary venous connection to the superior vena cava without atrial septal defect. A right axillary minithoracotomy is done through the fourth intercostal space. The pulmonary vein is detached from its origin in the superior vena cava. This is sutured with 6-0 reabsorbable polydioxanone suture (Ethicon, Somerville, NJ). A lateral clamp is applied to the left atrium, and the pulmonary vein is reimplanted. The patient is extubated in the operating room. Neither cardiopulmonary bypass nor blood transfusion was required. It is simple, safe, and reproducible. Copyright © 2011 The Society of Thoracic Surgeons. Published by Elsevier Inc. All rights reserved.

Successful Percutaneous Retrieval of an Inferior Vena Cava Filter Migrating to the Right Ventricle in a Bariatric Patient

International Nuclear Information System (INIS)

Veerapong, Jula; Wahlgren, Carl Magnus; Jolly, Neeraj; Bassiouny, Hisham

2008-01-01

The use of an inferior vena cava filter has an important role in the management of patients who are at high risk for development of pulmonary embolism. Migration is a rare but known complication of inferior vena cava filter placement. We herein describe a case of a prophylactic retrievable vena cava filter migrating to the right ventricle in a bariatric patient. The filter was retrieved percutaneously by transjugular approach and the patient did well postoperatively. A review of the current literature is given.

Acetylcholinesterase and Butyrylcholinesterase Inhibitory Compounds from Corydalis cava (Fumariaceae)

Czech Academy of Sciences Publication Activity Database

Chlebek, J.; Macáková, K.; Cahlíková, L.; Kurfürst, Milan; Kuneš, J.; Opletal, J.

2011-01-01

Roč. 6, č. 5 (2011), s. 607-610 ISSN 1934-578X Institutional research plan: CEZ:AV0Z40720504 Keywords : corydalis cava * fumariaceae * alzheimer ´s disease Subject RIV: CF - Physical ; Theoretical Chemistry Impact factor: 1.242, year: 2011

Inferior vena cava leiomyosarcoma: vascular reconstruction is not ...

African Journals Online (AJOL)

... vena cava is a rare and aggressive tumor, arising from the smooth muscle cells in the vessel wall. A large complete surgical resection is the essential treatment. The need of vascular reconstruction is not always mandatory. It's above all to understand the place of the reconstruction with artificial vascular patch prosthetics of ...

Bilateral Deep Vein Thrombosis Associated with Inferior Vena Cava Agenesis in a Young Patient Manifesting as Low Back Pain

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Felipe Langer

2017-04-01

Full Text Available Congenital absence of the inferior vena cava is a rare vascular anomaly, and most cases are asymptomatic. Nevertheless, patients with inferior vena cava malformations may have increased risk of deep venous thrombosis. Particularly, cases of bilateral deep venous thrombosis may arise owing to an insufficient collateral venous drainage from the lower limbs. We hereby describe a case of a previously healthy young male patient presenting with bilateral lower limb deep venous thrombosis as the initial clinical manifestation of congenital inferior vena cava agenesis. We conclude that in young patients presenting with deep venous thrombosis, especially when thrombosis occurs spontaneously, bilaterally, or recurrently, inferior vena cava anomalies should be thoroughly investigated and ruled out as appropriate.

Endobronchial Forceps-Assisted and Excimer Laser-Assisted Inferior Vena Cava Filter Removal: The Data, Where We Are, and How It Is Done.

Science.gov (United States)

Chen, James X; Montgomery, Jennifer; McLennan, Gordon; Stavropoulos, S William

2018-06-01

The recognition of inferior vena cava filter related complications has motivated increased attentiveness in clinical follow-up of patients with inferior vena cava filters and has led to development of multiple approaches for retrieving filters that are challenging or impossible to remove using conventional techniques. Endobronchial forceps and excimer lasers are tools for designed to aid in complex inferior vena cava filter removals. This article discusses endobronchial forceps-assisted and excimer laser-assisted inferior vena cava filter retrievals. Copyright © 2018 Elsevier Inc. All rights reserved.

OptEase and TrapEase Vena Cava Filters: A Single-Center Experience in 258 Patients

International Nuclear Information System (INIS)

Onat, Levent; Ganiyusufoglu, Ali Kursat; Mutlu, Ayhan; Sirvanci, Mustafa; Duran, Cihan; Ulusoy, Onur Levent; Hamzaoglu, Azmi

2009-01-01

We aimed to evaluate the efficacy and safety of the OptEase and TrapEase (both from Cordis, Roden, Netherlands) vena cava filters in the prevention of pulmonary embolism (PE). Between May 2004 and December 2008, OptEase (permanent/retrievable; n = 228) or TrapEase (permanent; n = 30) vena cava filters were placed in 258 patients (160 female and 98 male; mean age 62 years [range 22 to 97]). Indications were as follows: prophylaxis for PE (n = 239), contraindication for anticoagulation in the presence of PE or DVT (n = 10), and development of PE or DVT despite anticoagulation (n = 9). Medical records were retrospectively reviewed for indications, clinical results, and procedure-related complications during placement and retrieval. Clinical PE did not develop in any of the patients. However, radiologic signs of segmental PE were seen in 6 of 66 patients with follow-up imaging data. Migration or fracture of the filter or cava perforation was not seen in any of the patients. Except for a single case of asymptomatic total cava thrombosis, no thrombotic occlusion was observed. One hundred forty-one patients were scheduled to undergo filter removal; however, 17 of them were not suitable for such based on venography evaluation. Removal was attempted in 124 patients and was successful in 115 of these (mean duration of retention 11 days [range 4 to 23]). Nine filters could not be removed. Permanent/retrievable vena cava filters are safe and effective devices for PE prophylaxis and for the management of venous thromboembolism by providing the option to be left in place.

Análisis de soldadura de una plataforma para transporte de maquinaria pesada

OpenAIRE

Armijo Verdezoto, Ivan Rodrigo; Serano V, Omar

2009-01-01

El presente trabajo trata del “Análisis de Soldadura de una Plataforma para Transporte de Maquinaria Pesada”, así como del costo de construcción de dicha estructura ampliamente usada en el campo del transporte y alquiler de maquinaria en el Ecuador, teniendo también otras diversas formas de uso para esta plataforma siempre y cuando estén dentro del límite de capacidad (30ton); usos tales como transporte de tanques, vigas de grandes dimensiones, etc. Se realizó un análisis previo a la est...

Métodos cromatográficos para determinar aminas biogênicas em alimentos de origem animal

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César Aquiles Lázaro de la Torre

2013-12-01

Full Text Available Aminas biogenicas sao formadas como resultado da descarboxilacao de aminoacidos livres especificos. A analise desses metabolitos e de grande importancia na determinacao da qualidade e monitoramento de biogenicas como histamina e tiramina relacionadas com episodios de intoxicacao em humanos. A cromatografia e uma tecnica de separacao química usada para caracterizar aminas biogenicas. Variacoes da tecnica (cromatografia liquida, em camada delgada e gasosa tem sido amplamente usadas, porem a complexidade da matriz alimentar faz com que sejam realizadas mudancas nos processos de extracao, derivatizacao e deteccao em concordancia com cada grupo de alimento. A cromatografia liquida de alta eficiencia (CLAE e o metodo mais utilizado na determinacao de aminas biogenicas em alimentos. Contudo, devido a importancia das aminas biogenicas no controle da qualidade e a seguranca do consumidor, os pesquisadores tentam desenvolver novos metodos com o intuito de uma analise mais rapida e precisa para o controle de alimentos no mercado. O objetivo da revisao e apresentar algumas tecnicas cromatograficas aplicadas no monitoramento de aminas biogenicas em produtos de origem animal.

Intracranial hemorrhage due to intracranial hypertension caused by the superior vena cava syndrome

DEFF Research Database (Denmark)

Bartek, Jiri; Abedi-Valugerdi, Golbarg; Liska, Jan

2013-01-01

We report a patient with intracranial hemorrhage secondary to venous hypertension as a result of a giant aortic pseudoaneurysm that compressed the superior vena cava and caused obstruction of the venous return from the brain. To our knowledge, this is the first patient reported to have...... an intracranial hemorrhage secondary to a superior vena cava syndrome. The condition appears to be caused by a reversible transient rise in intracranial pressure, as a result of compression of the venous return from the brain. Treatment consisted of surgery for the aortic pseudoaneurysm, which led...

EJEMPLOS DE AYUDAS PEDAGÓGICAS CON CALCULADORAS PROGRAMABLES PARA EL MEJORAMIENTO DE LA ENSEÑANZA EN MATEMÁTICAS

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Jesús Fernando Novoa Ramírez

2005-06-01

Full Text Available Se presentan algunos ejemplos para motivar el uso de herramientas docentes que las calculadoras poseen. Estas herramientas son la programación, las presentaciones y el desarrollo de material de clase, las cuales pueden ser usadas en todos los niveles de la educación.

Renal Angiomyolipoma Associated with Inferior Vena Cava Thrombus

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Xavier Durand

2009-01-01

Full Text Available A 57-year-old woman was found to have an inferior vena cava involvement of a known sinusal angiomyolipoma incompletely resected three years beforehand. Intravascular extension into the IVC of angiomyolipoma has rarely been reported. We present a new case and reconsider the literature about this uncommon complication of a benign renal tumor.

Comunicação interatrial do tipo seio coronário, comunicação interventricular e ausência de veia cava superior esquerda

OpenAIRE

Almeida,Fábio Alves; Pedra,Carlos Augusto Cardoso; Jesus,Carlos Augusto de; Pedra,Simone Rolim Fernandes Fontes; Fontes,Valmir Fernandes; Sousa,Luís Carlos Bento de

1998-01-01

Relatamos um caso raro de um paciente de 21 meses, portador de comunicação interatrial do tipo seio coronário, associada a comunicação interventricular perimembranosa, e ausência de veia cava superior esquerda. O diagnóstico foi realizado através da ecocardiografia e confirmado pela angiografia. O paciente foi operado sem intercorrências, ambos os defeitos foram fechados com patch de pericárdio bovino e o fluxo das veias coronárias ficou direcionado para o átrio esquerdo. Um ecocardiograma mo...

Vena cava filter placement via the antecubital access: a report of 6 cases

International Nuclear Information System (INIS)

Yu Bo; Shi Weihao; He Qing; Wang Tieping; Wang Wei

2008-01-01

Objective: To study the methods and skill of vena cava filter placement via the antecubital access. Methods: Six patients with DVT (4 males and 2 females, mean age of 62) underwent vena cava filter placement via the antecubital access in Huashan Hospital from Oct. 2004 to May. 2006. The right basilic vein was punctured with the use of micropuncture technique. SNF(Simon nitinol filter, Bard)was inserted through its carrier into the 90-cm-long sheath. The filter was then deployed with a standard fashion in the IVC, 5 cm inferior to the renal vein. Results: The filter was once placed successfully in all six patients within average time of 25 min without complications, but with good healing, exclusion of bleeding and no phlebitis. The position of filter was accurate without deviation and no occurrence of pulmonary embolism. Conclusions: vena cava filter placement via antecubital access is easy, minimal invasive, no need of lying in bed postoperatively. It is beneficial for DVT patients as an alternative for the contra-indication to femoral venous access. (authors)

Roentgenologic diagnosis of pulmonary veins pathologically inflowing into vena cava inferior

International Nuclear Information System (INIS)

Shumskij, V.I.; Konstantinova, N.V.; Fedorovich, Yu.N.

1986-01-01

The authors considered the problem of X-ray semiotics of the right inferior pulmonary vein pathologically inflowing in the vena cava inferior (4 patients) and the false syndrome of the ''Turkish sabre'' (1 patients). Among the patients there were 2 adults and 3 children. It was noted that the abnormal inflowing of the right lower lobe vein in the vena cava inferior was often combined with different types of heart diseases and defects of the major vessels, mainly with the defect of the interatrial septum, the open arterial canal and hypoplasia of the right pulmonary artery. Radiodiagnosis for this group of patients should incorporate, in addition to routine X-ray methods, angiographic investigation, and its volume in each case should be determined on an individual basis

Metodologías Sugeridas de Evaluación y Selección de Software de Arquitectura Empresarial para la Digitalización del Conocimiento

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Oswaldo Moscoso-Zea

2017-02-01

Full Text Available La gestión del conocimiento (GC es una práctica de administración que permite la creación, uso, distribución y transferencia del conocimiento en organizaciones. Existen marcos de referencia de GC que incluyen componentes de inteligencia de negocios o de arquitectura empresarial (AE para la implementación de proyectos de GC en organizaciones. Las herramientas de AE son usadas para digitalizar, relacionar y visualizar varias dimensiones de conocimiento como son: estructura organizacional, procesos de negocio, aplicaciones e infraestructura tecnológica. Este artículo tiene como objetivo evaluar el rol de la AE como componente clave de la GC y sugerir metodologías que pueden ser usadas para evaluar herramientas de software de AE. Para esto se realizó una revisión bibliográfica de las metodologías de evaluación de software existente en el mercado y se eligieron aquellas que pueden ser adaptadas para el campo de la AE. Está investigación fue cualitativa y exploratoria a través de un caso de estudio desarrollado en un proveedor de servicios logísticos con presencia internacional. El caso de estudio muestra el proceso realizado para elegir la metodología de evaluación. Además, se describen los pasos para la digitalización del conocimiento organizacional.

Unusual caudal vena cava thrombosis in a cow, secondary to Trueperella (Arcanobacterium pyogenes infection

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Rodrigo Garcia Motta

Full Text Available Abstract: The caudal vena cava thrombosis, or pulmonary thromboembolism, in cattle is correlated with lactic acidosis, caused by diets rich in grains and highly fermentable, associated or not to septic situations, used in feedlots of beef or high-producing dairy cattle. This paper reports an unusual caudal vena cava thrombosis in a cow, secondary to Trueperella (Arcanobacterium pyogenes infection, resulting in reduced milk production, anorexia, pale mucous membranes, ruminal atony, sternal decubitus and autoauscultation position. The heart was enlarged at necropsy, presence of clots distributed along the thoracic cavity, adherence between lung and pleura, abscesses, emphysema, petechiae, suffusions and ecchymosis in lungs, thickening of the caudal vena cava wall, hepatomegaly with chronic passive congestion ("nutmeg" aspect, and rumenitis. In lab, the actinomycete Trueperella (Arcanobacterium pyogenes was isolated from liver and lung samples, probably resulting through dissemination of the bacteria of the rumen content, what reaffirms the opportunistic behavior of this actinomycete.

Avaliação in vitro de um novo filtro de veia cava In vitro evaluation of a new vena cava filter

Directory of Open Access Journals (Sweden)

Domingo Marcolino Braile

2005-01-01

Full Text Available OBJETIVO: O objetivo do estudo foi avaliar a eficácia de um novo filtro de veia cava, de baixo perfil, na retenção de coágulos em modelo in vitro. MÉTODO: O filtro consiste em dois cones opostos pelo ápice. O cone distal é formado por oito hastes de aço inoxidável, que têm a função de retenção dos êmbolos. O cone proximal é constituído de quatro hastes, cuja função é ancorar e centralizar. Os filtros foram introduzidos e fixados no interior de um tubo de PVC transparente de 25, 30 e 35 mm de diâmetro interno, em posição vertical, e conectados com um sistema pulsátil de fluxo (bomba peristáltica. Foi utilizado, para veículo, um reservatório com solução salina (0,9% com 40% de glicerina, mantido em temperatura ambiente. Confeccionaram-se trombos com sangue bovino em tubos plásticos de 3, 4,5 e 6 mm de diâmetro e, posteriormente, foram segmentados nas medidas de 10, 15, 20 e 30 mm de comprimento, totalizando 12 diferentes tamanhos. Realizaram-se 100 liberações para cada tipo de êmbolo e tamanho das cânulas, totalizando 3.600 eventos. Foram feitos lançamentos seqüenciais com cinco êmbolos, sendo 10 para cada tamanho de êmbolo e cânulas, totalizando 360 eventos. Fez-se avaliação da capacidade de retenção dinâmica utilizando os três diferentes tamanhos de cânulas com 100 eventos cada, totalizando 300 eventos. RESULTADOS: Detectou-se que o diâmetro e comprimento dos êmbolos, assim como diâmetros da cânula, podem comprometer a eficácia do filtro. A média de captura de êmbolos pelos filtros foi de 80,5% nas cânulas de 35 mm, 88,7% para cânulas de 30 mm e 86,6% para cânulas de 25 mm. CONCLUSÃO: Conclui-se que a eficácia desse filtro sofre interferência relacionada ao tamanho dos êmbolos e diâmetro da cânula.OBJECTIVE: The objective of the current study was to evaluate the efficacy of a new low-profile vena cava filter in the retention of emboli in an in vitro model. METHOD: The filter consists

Vascular Reconstruction Technique Using a Tubular Graft for Leiomyosarcoma of the Inferior Vena Cava: A Case Report

Directory of Open Access Journals (Sweden)

C. Higutchi

Full Text Available Objective/background: This study is a case report that addresses the key aspects of vascular reconstruction, as well as the intraoperative complications, postoperative morbidity, and possibility of adjunctive therapy. Methods: This article reports the case of a 46 year old female patient with a leiomyosarcoma located in the middle segment of the inferior vena cava (between the renal and hepatic veins who underwent surgical resection with vena cava reconstruction and insertion of a tubular graft made of a synthetic material. Results: This case report reveals that surgical resection of the tumor with the insertion of a smaller-caliber tubular graft provide better patency of the vena cava reconstruction, which was maintained for a year after surgery. In addition, the patient was asymptomatic for lower limb edema, despite having a local recurrence after one year. Surgical resection is the treatment of choice for leiomyosarcoma of the inferior vena cava (LIVC and is the only therapy that offers a chance of cure. Several surgical techniques are used for this condition, especially, reconstruction with a vascular graft using natural or synthetic materials. Conclusion: Due to the aggressiveness of the disease, this study suggests that surgical intervention used may have no influence on a patient's survival outcome. However, vascular reconstruction with a smaller-caliber tubular graft may yield a better prognosis for patients in terms of postoperative symptoms, such as edema and thrombosis. Keywords: Inferior vena cava, Leiomyosarcoma, Synthetic vascular grafting

Abdominal wall phlebitis due to Prevotella bivia following renal transplantation in a patient with an occluded inferior vena cava

NARCIS (Netherlands)

Janssen, S.; van Donselaar-van der Pant, K. A. M. I.; van der Weerd, N. C.; Develter, W.; Bemelman, F. J.; Grobusch, M. P.; Idu, M. M.; ten Berge, I. J. M.

2013-01-01

Pre-existing occlusion of the inferior vena cava may complicate renal transplantation. Suppurative abdominal wall phlebitis following renal transplantation was diagnosed in a patient with pre-existing thrombosis of the inferior vena cava of unknown cause. The phlebitis developed in the subcutaneous

Myofibroblastic tumor associated to superior vena cava syndrome

International Nuclear Information System (INIS)

Ortega Jaramillo, Hector; Durango Gutierrez, Luisa Fernanda; Perez Figueroa, Maria del Pilar

2005-01-01

Inflammatory myofibroblastic tumor (IMT) is an uncommon pathological entity of unknown cause, composed of differentiated myofibroblastic cells accompanied by plasma cells, lymphocytes and eosinophils, which involve extrapulmonary and pulmonary tissues. IMT has an unpredictable clinical course, rarely undergoes malignant transformation. Local invasion and involvement of the mediastinum and hiliar structures are unusual manifestations; however; we reports a case of superior vena cava syndrome and IMT

The initial experience of transjugular retrieval of Geunther Tulip inferior vena cava filters

International Nuclear Information System (INIS)

Xiao Liang; Shen Jing; Tong Jiajie; Li Haiwei; Xu Ke

2011-01-01

Objective: To explore the indications and technical procedures of transjugular retrieval of Geunther Tulip inferior vena cava filters. Methods: Seventy-four patients (40 males and 34 females with a mean age of 45.8 years) with acute lower extremity deep venous thrombosis encountered in our hospital from September 2007 to Mar 2009 were involved in this study. The onset of the disease was from one day to 14 days. Clinical symptoms included swelling, pain, cyanosis or pallescence of the affected limb with higher or normal skin temperature. Thirty-one patients who complicated with pulmonary embolism suffered from dyspnoea, chest pain, hemoptysis, etc. Implantation of Geunther Tulip retrievable inferior vena cava filters through femoral or right internal jugular vein was carried out, which was followed by intravenous transcatheter thrombolysis. Vascular ultrasound and angiography showed no fresh or free thrombus in 12-80 days after initial treatment, then the Geunther Tulip filter was taken out from right internal jugular vein, and inferior vena cavography was performed again. All patients accepted anticoagulation and antibiotic treatment for 3-5 days after operation. A follow-up lasting for 4-12 months was made. Results: Successful implantation of Geunther Tulip retrievable inferior vena cava filter with only one session was obtained in all 74 patients. During implantation procedure one filter became tilted 25 degrees. Successful removal of Geunther Tulip retrievable inferior vena cava filter was achieved in 40 patients in 41.3 days (12-80 days) after the filter was delivered, and the procedure cost only 5.8 minutes (1-115 minutes) with a successful rate of 97.6% (40/41). Failure of retrieval of IVC filter due to compact adhesion of the filter to IVC wall happened in one patient. Inferior vena cavography again confirmed that there was no any sign of vascular perforation or rupture. Retrieval of IVC filter was not performed in other 33 patients and no clinical

Preparative isolation and purification of phlorotannins from Ecklonia cava using centrifugal partition chromatography by one-step.

Science.gov (United States)

Lee, Ji-Hyeok; Ko, Ju-Young; Oh, Jae-Young; Kim, Chul-Young; Lee, Hee-Ju; Kim, Jaeil; Jeon, You-Jin

2014-09-01

Various bioactive phlorotannins of Ecklonia cava (e.g., dieckol, eckol, 6,6-bieckol, phloroglucinol, phloroeckol, and phlorofucofuroeckol-A) are reported. However, their isolation and purification are not easy. Centrifugal partition chromatography (CPC) can be used to efficiently purify the various bioactive-compounds efficiently from E. cava. Phlorotannins are successfully isolated from the ethyl acetate (EtOAc) fraction of E. cava by CPC with a two-phase solvent system comprising n-hexane:EtOAc:methanol:water (2:7:3:7, v/v) solution. The dieckol (fraction I, 40.2mg), phlorofucofuroeckol-A (fraction III, 31.1mg), and fraction II (34.1mg) with 2,7-phloroglucinol-6,6-bieckol and pyrogallol-phloroglucinol-6,6-bieckol are isolated from the crude extract (500 mg) by a one-step CPC system. The purities of the isolated dieckol and phlorofucofuroeckol-A are ⩾90% according to high performance liquid chromatography (HPLC) and electrospray ionization multi stage tandem mass spectrometry analyses. The purified 2,7-phloroglucinol-6,6-bieckol and pyrogallol-phloroglucinol-6,6-bieckol are collected from fraction II by recycle-HPLC. Thus, the CPC system is useful for easy and simple isolation of phlorotannins from E. cava. Copyright © 2014 Elsevier Ltd. All rights reserved.

Diagnosis of tricuspid insufficiency by Doppler flowmetry in the inferior vena cava. A comparison with right ventricular angiography

Energy Technology Data Exchange (ETDEWEB)

Smith, H.J.

Eighty-five patients subjected to routine heart catheterization were examined with duplex scanning of the inferior vena cava. Adequate Doppler recordings and a right ventricular angiography were obtained in 79 of them. Tricuspid insufficiency was found to be present in 34 patients at angiography and in 24 at duplex examination. No false positive Doppler diagnoses of tricuspid insufficiency occurred. The possibility of false positive angiographic diagnoses is discussed. A high correlation was found between percentage reversed flow in the inferior vena cava during ventricular systole and degree of angiographic tricuspid insufficiency. It is concluded that duplex scanning of the inferior vena cava seems to be a good alternative to angiography in the diagnosis and quantification of tricuspid insufficiency.

Asymptomatic Lumbar Vertebral Erosion from Inferior Vena Cava Filter Perforation

International Nuclear Information System (INIS)

Fang, Wayne; Hieb, Robert A.; Olson, Eric; Carrera, Guillermo F.

2007-01-01

In 2002, a 24-year-old female trauma patient underwent prophylactic inferior vena cava filter placement. Recurrent bouts of renal stones prompted serial CT imaging in 2004. In this brief report, we describe erosion and ossification of the L3 vertebral body by a Greenfield filter strut

Superior vena cava obstruction caused by radiation induced venous fibrosis

NARCIS (Netherlands)

Van Putten, JWG; Schlosser, NJJ; Vujaskovic, Z; Van der Leest, AHD; Groen, HJM

Superior vena cava syndrome is most often caused by lung carcinoma. Two cases are described in whom venous obstruction in the superior mediastinum was caused by local vascular fibrosis due to radiotherapy five and seven years earlier. The development of radiation injury to greater vessels is

Removal of a Guenther Tulip retrievable inferior vena cava filter after 147 days in a pediatric patient

Energy Technology Data Exchange (ETDEWEB)

Mody, Rekha N.; Stokes, LeAnn S.; Bream, Peter R.; Spottswood, Stephanie E. [Vanderbilt University Medical Center, Department of Radiology, Nashville, TN (United States)

2006-05-15

A Guenther Tulip retrievable inferior vena cava filter was placed in a 9-year-old boy with T-cell ALL who had both iliofemoral deep vein thrombosis (DVT) and acute intracranial hemorrhage. The filter was removed 147 days after placement, when the patient was no longer at increased risk for DVT or pulmonary embolus. Removal of the filter did not compromise flow through the vena cava. (orig.)

Removal of a Guenther Tulip retrievable inferior vena cava filter after 147 days in a pediatric patient

International Nuclear Information System (INIS)

Mody, Rekha N.; Stokes, LeAnn S.; Bream, Peter R.; Spottswood, Stephanie E.

2006-01-01

A Guenther Tulip retrievable inferior vena cava filter was placed in a 9-year-old boy with T-cell ALL who had both iliofemoral deep vein thrombosis (DVT) and acute intracranial hemorrhage. The filter was removed 147 days after placement, when the patient was no longer at increased risk for DVT or pulmonary embolus. Removal of the filter did not compromise flow through the vena cava. (orig.)

Evaluación del gluten de maíz como una fuente reemplazante de la harina de pescado en dietas para el camarón juvenil litopenaeus vannamei

OpenAIRE

Molina, César

2004-01-01

Evaluación del gluten de maíz como una fuente reemplazante de la harina de pescado en dietas para el camarón juvenil Litopenaeus vannamei En alimentos para especies acuáticas comerciales, la harina de pescado es una de las fuentes de proteína marina más ampliamente usada, por su alto valor nutricional y palatabilidad.

Uso de secuencias nucleotídicas que codifican pirofosfatasas translocadoras de protones para producir levaduras, hongos y células animales resistentes a fármacos citotóxicos y fungicidas y método para producirlas

OpenAIRE

Serrano, Aurelio; Hernández, Agustín; Pérez-Castiñeira, J. R.

2011-01-01

La presente invención se refiere a una secuencia de nucleótidos de origen vegetal o microbiano que codifica para una secuencia de aminoácidos correspondiente a una pirofosfatasa translocadora de protones (H+-PPasa, miembro de una familia de proteínas con código identificativo PF03030 de la base de datos Pfam), la cual es usada para transformar o transfectar una célula de levadura (p.e. Saccharomyces cerevisiae), fúngica o animal que naturalmente no contienen esta clase de proteínas, con la fi...

Effects of different litter depths on environmental parameters and growth performance of growing finishing pigs Efeito de diferentes profundidades de cama usada para suínos em crescimento e em terminação sobre parâmetros ambientais e desempenho de crescimento

Directory of Open Access Journals (Sweden)

Érico Kunde Corrêa

2009-06-01

, comparando três tratamentos: cama de casca de arroz com 0,5m (T1, com 0,25m de profundidade (T2 e piso de concreto (T3. A primeira cama foi usada em dois lotes de animais e foi substituída por uma segunda, usada em outros dois lotes, compreendendo 52 semanas. Cada lote foi constituído por cinco animais criados dos 60 aos 145 dias de idade, em uma baia de 7m². Os seguintes parâmetros ambientais foram medidos semanalmente: temperatura ambiente, umidade relativa e temperatura no centro da baia, na superfície (TSF e na metade da profundidade da cama (TMP, apenas em T1 e T2. O consumo de ração e o peso dos animais foram aferidos a cada quatro semanas. A temperatura ambiente e a umidade relativa não foram influenciadas pelos tratamentos (P>0,05. A TSF média foi de 22,8±3,6°C, sendo menor no T3 (P0,05. A TSF foi mais alta nas camas novas do que nas usadas (P<0,001 e nas primeiras camas em comparação com as segundas (P=0,03, aparentemente sendo mais alta nos lotes criados durante as fases termofílicas. A TMP média foi de 33,8 ± 10,8°C, sendo mais alta no T1 do que no T2 (P<0,05. A TMP também foi mais alta nas camas novas do que nas usadas (P<0,001 e nas primeiras camas em comparação com as segundas (P<0,05. Nenhum dos parâmetros de crescimento diferiu entre os tratamentos (P<0,05. Ainda que possam ocorrer condições de conforto térmico desfavoráveis aos animais, principalmente sob temperaturas mais elevadas, o sistema de criação sobre cama pode ser usado nos setores de crescimento e terminação sem prejuízo para o desempenho de crescimento.

Desarrollo de una aplicación móvil para medida de la aceleración de la gravedad

OpenAIRE

Gallego Jiménez, Ángel

2015-01-01

El proyecto consiste en una aplicación móvil para sistemas operativos Android que sirva como complemento para las clases de física para el estudio y compresión de la aceleración de la gravedad en distintos experimentos. Dicha aplicación móvil será usada en los laboratorios de física, a petición del Departamento de Física Aplicada de la Universidad de Valladolid. La aplicación permitirá a los alumnos poder consultar fundamentos teóricos sobre la aceleración de la gravedad y los distintos ex...

Desarrollo de una aplicación móvil para medida de la aceleración de la gravedad

OpenAIRE

Gallego Jiménez, Ángel; González, Manuel Á.

2015-01-01

El proyecto consiste en una aplicación móvil para sistemas operativos Android que sirva como complemento para las clases de física para el estudio y compresión de la aceleración de la gravedad en distintos experimentos. Dicha aplicación móvil será usada en los laboratorios de física, a petición del Departamento de Física Aplicada de la Universidad de Valladolid. La aplicación permitirá a los alumnos poder consultar fundamentos teóricos sobre la aceleración de la gravedad y los distintos...

An urban trauma centre experience with abdominal vena cava injuries

African Journals Online (AJOL)

Background: The aim of the study was to present the surgical management of injuries to the abdominal vena cava (AVC) and to identify clinical and physiological factors and management strategies which affect the outcome. Methods: A retrospective review was conducted of AVC injuries in patients attending the trauma ...

Percutaneous retrieval of a vena cava filter from the right atrium: case report

International Nuclear Information System (INIS)

Rasuli, P.; Mehran, R.; French, G.; Turek, M.; Lalonde, K.A.; Cardinal, P.

2000-01-01

Migration of vena cava filters can occur spontaneously, but it can also occur as a result of entanglement of the filter with a guidewire, particularly during 'blind' (unguided) insertion of a central venous line. When a filter migrates to the heart, traditional practice has been either to leave the filter in place or to remove it surgically by means of open heart surgery and cardiopulmonary bypass. We found only 6 reports of successful percutaneous retrieval or repositioning of a vena cava filter (Table 1). We describe a new interventional technique for retrieving a filter from the right atrium and a novel endosurgical method for removing a filter from the innominate vein. (author)

Percutaneous retrieval of a vena cava filter from the right atrium: case report

Energy Technology Data Exchange (ETDEWEB)

Rasuli, P. [The Ottawa Hospital and University of Ottawa, Dept. of Radiology, Ottawa, Ontario (Canada); Mehran, R. [The Ottawa Hospital and University of Ottawa, Dept. of Thoracic Surgery, Ottawa, Ontario (Canada); French, G. [The Ottawa Hospital and University of Ottawa, Dept. of Radiology, Ottawa, Ontario (Canada); Turek, M. [The Ottawa Hospital and University of Ottawa, Dept. of Internal Medicine, Ottawa, Ontario (Canada); Lalonde, K.A. [The Ottawa Hospital and University of Ottawa, Dept. of Thoracic Surgery, Ottawa, Ontario (Canada); Cardinal, P. [The Ottawa Hospital and University of Ottawa, Dept. of Internal Medicine, Ottawa, Ontario (Canada)

2000-07-01

Migration of vena cava filters can occur spontaneously, but it can also occur as a result of entanglement of the filter with a guidewire, particularly during 'blind' (unguided) insertion of a central venous line. When a filter migrates to the heart, traditional practice has been either to leave the filter in place or to remove it surgically by means of open heart surgery and cardiopulmonary bypass. We found only 6 reports of successful percutaneous retrieval or repositioning of a vena cava filter (Table 1). We describe a new interventional technique for retrieving a filter from the right atrium and a novel endosurgical method for removing a filter from the innominate vein. (author)

Desenvolvimento de dispositivo de electroterapia para medicina física e reabilitação

OpenAIRE

Leitão, Cátia Sofia Jorge

2010-01-01

A electroterapia é uma das modalidades terapêuticas mais usadas em Medicina Física e Reabilitação. A presente dissertação assenta no desenvolvimento de um protótipo de dispositivo de aplicação de correntes eléctricas de baixa e média frequência. O objectivo principal é assim a recolha e especificação de requisitos técnicos e regulamentares para a concepção, desenvolvimento e prototipagem de equipamentos de electroterapia. A recolha de requisitos técnicos para desenvolver um dispositivo méd...

Bilateral dyb venos trombose og vena cava-aplasi behandlet med lokal trombolyse

DEFF Research Database (Denmark)

Pelta, A.M.; Jorgensen, M.; Jensen, L.P.

2008-01-01

In this case report the treatment of a young man with bilateral iliaco-femoral DVT and vena cava aplasia is presented. The patient was treated with catheter-directed thrombolysis; the catheters were introduced in the thrombus of both legs via v. popliteae. The treatment led to almost complete thr...... thrombus resolution and no valvular incompetence at three months follow-up. In our opinion this treatment should be offered even in complex cases of acute proximal deep venous thrombosis Udgivelsesdato: 2008/5/19......In this case report the treatment of a young man with bilateral iliaco-femoral DVT and vena cava aplasia is presented. The patient was treated with catheter-directed thrombolysis; the catheters were introduced in the thrombus of both legs via v. popliteae. The treatment led to almost complete...

[Bilateral deep venous thrombosis and vena cava aplasia treated with local thrombolysis

DEFF Research Database (Denmark)

Pelta, A.M.; Jørgensen, Maja; Just, Sven Richardt Lundgren

2008-01-01

In this case report the treatment of a young man with bilateral iliaco-femoral DVT and vena cava aplasia is presented. The patient was treated with catheter-directed thrombolysis; the catheters were introduced in the thrombus of both legs via v. popliteae. The treatment led to almost complete thr...... thrombus resolution and no valvular incompetence at three months follow-up. In our opinion this treatment should be offered even in complex cases of acute proximal deep venous thrombosis Udgivelsesdato: 2008/5/19......In this case report the treatment of a young man with bilateral iliaco-femoral DVT and vena cava aplasia is presented. The patient was treated with catheter-directed thrombolysis; the catheters were introduced in the thrombus of both legs via v. popliteae. The treatment led to almost complete...

El uso de Google Docs para incrementar la motivación para la escritura en inglés en un curso de inglés para propósitos específicos en el área de la Administración

OpenAIRE

Oguilve, Verónica; Universidad Estatal a Distancia; Vindas, Nuria; Instituto Tecnológico de Costa Rica; Moya, Maciel; Universidad de Costa Rica

2013-01-01

En la mayoría de clases de inglés como lengua extranjera, la escritura es unade las habilidades a las que tradicionalmente le falta un propósito comunicativoy un público. Como consecuencia, los estudiantes podrían desarrollar actitudesnegativas hacia los trabajos escritos y su motivación podría disminuir. En estainvestigación, Google Docs, una herramienta 2.0, fue usada como una herramientacomunicativa para aumentar la motivación en trabajos escritos. Los resultadosdemostraron que en su mayor...

Creating a Fontan fenestration in a child with dextrocardia and interrupted inferior vena cava

Directory of Open Access Journals (Sweden)

Pradeepkumar Charlagorla

2016-01-01

Full Text Available Plastic bronchitis is a rare life-threatening complication of the Fontan operation. Transcatheter Fontan fenestration can ameliorate symptoms by decompressing elevated venous pressures. Transcatheter creation of a fenestration can be technically challenging in cases with complex venous anatomy. We report a case of a 5-year-old boy with heterotaxy, dextrocardia with unbalanced atrioventricular canal (AVC, atrial and visceral situs inversus, left-sided superior vena cava (SVC, and left-sided interrupted inferior vena cava (IVC with azygos continuation. With few modifications to the equipment, a successful Fontan fenestration with stent implantation was performed via transjugular approach. At 2-year follow-up, his symptoms of plastic bronchitis improved significantly.

Is there a relationship between the diameter of the inferior vena cava ...

African Journals Online (AJOL)

2015-04-12

Apr 12, 2015 ... Key words: Central venous pressures, critically ill patients, inferior vena cava. Date of Acceptance: ... Regardless of the cause of the patient's status, the blood/ .... AUC=Area under ROC curve, IAP=Anteroposterior diameter of.

Outcome of prolonged acute vena cava occlusion after iatrogenic transection and repair in a dog.

Science.gov (United States)

Halwagi, Marie-Chantal; Crawford, Evan; Hoddinott, Katie; Oblak, Michelle L

2017-08-01

A 12-year-old castrated male Airedale terrier dog was diagnosed with a hepatocellular carcinoma in the right medial liver lobe. During tumor resection, inadvertent stapling and transection of the caudal vena cava occurred. Complete caval occlusion was required for 18 minutes and primary anastomosis was completed. The dog received 2 blood transfusions and developed mild pelvic limb edema after surgery. Computed tomography evaluation 9 months after surgery showed collateral circulation and suspected stricture of the vena cava with an absence of clinical effect. The dog remained alive and asymptomatic more than 1 year after surgery.

An elusive persistent left superior vena cava draining into left atrium

NARCIS (Netherlands)

A. Soward; F.J. ten Cate (Folkert); P.M. Fioretti (Paolo); P.W.J.C. Serruys (Patrick); J.R.T.C. Roelandt (Jos)

1986-01-01

textabstractA case report of a persistent left superior vena cava draining into left atrium with a fibromuscular left ventricular outflow tract obstruction and a small atrial septal defect. The anomalous vessel escaped detection during two right and left heart catheterizations from the right arm and

Effects of the Addition of Ecklonia cava Powder on the Selected Physicochemical and Sensory Quality of White Pan Bread

OpenAIRE

Lee, Jun Ho; Choi, Dong Won

2013-01-01

Physicochemical properties and consumer perception of white pan bread as influenced by the addition of Ecklonia cava powder (ECP) were investigated. Freeze-dried Ecklonia cava were ground, sieved through a laboratory sieve and a fraction with particles less than 250 μm was used. Amount of ECP added (0~3%) to the bread was found to affect the bread quality significantly (P

Extensões e caracterizações de buscas para hipergrafos com arestas múltiplas

Directory of Open Access Journals (Sweden)

Silvio Luiz Bragatto Boss

2016-09-01

Full Text Available Busca em grafos é uma das técnicas mais utilizadas para o projeto de algoritmos em grafos. Em tais buscas, a ordem em que os vértices de um grafo são visitados definem uma enumeração nos vértices do grafo e uma caracterização dessas enumerações que, de acordo com a estratégia usada na busca, tem se mostrado importante nas aplicações de algoritmos em grafos. Neste trabalho generalizamos o conceito de busca e as caracterizações, bem conhecidas no caso de grafos, para o caso de hipergrafo.

Control de ph para planta de tratamiento de aguas residuales

OpenAIRE

Wilson Fabián Amaya; Óscar Alberto Cañón; Óscar F. Avilés

2004-01-01

En este trabajo se presenta el problema de controlar el pH en una planta de tratamiento de aguas residuales (PTAR), la cual recibe soluciones ácidas provenientes de la producción de jugos (pH 2-5) que se dosifica con la sustancia usada para aseo (soda cáustica 0.04%) con valores oscilatorios de pH 9-11. Se desarrolló e implementó un controlador clásico PI en un PLC comercial y se automatiza la PTAR mostrando el resultado obtenido en simulación en MatLAB.

Estrategias usadas para alimentar a niños preescolares por madres de una zona urbano marginal de Lima, Perú

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Doris Delgado-Pérez

Full Text Available RESUMEN Se exploraron las estrategias que usan las madres de una zona urbano-marginal de Lima, para alimentar a sus hijos de 36 a 66 meses de edad. Estudio cualitativo con método de teoría fundamentada realizado en 30 madres que participaron en 1 de 4 grupos focales y/o 1 de 11 entrevistas a profundidad. Las entrevistas a profundidad y grupos focales, previamente grabadas, fueron transcritas para la identificación de los temas finales. La edad de las madres estuvo entre los 22 y 42 años; 60% de ellas con educación básica incompleta. Se encontraron como estrategias positivas dar de comer cuando tiene apetito y el manejo de oportunidades para dar de comer. Como estrategias negativas se encontró presionar para que coma y uso de castigo o premio para que termine su comida. Se concluye que las madres utilizaron estrategias positivas y negativas con la finalidad de que sus hijos coman toda su comida servida.

Right atrium and superior vena cava pressure measurements in a novel animal model to study one and a half ventricle repair as compared to Fontan type procedure

Directory of Open Access Journals (Sweden)

Anil Bhattarai

2017-01-01

Full Text Available Background & Objectives: To evaluate the advantages of the one and a half ventricle repair on maintaining a low pressure in the inferior vena cava district. Also evaluate the competition of flows at the superior vena cava – right pulmonary artery anastomosis site, in order to understand the hemodynamic interaction of a pulsatile flow in combination to a laminar one. Materials & Methods: Adult rabbits (n=30 in terminal anaesthesia with a follow up of 8 h were used, randomly distributed in three experimental groups: Group 1: animals with an anastomosis between superior vena cava and right pulmonary artery, as a model of one and one half ventricle repair; Group 2: animals with the cavopulmonary anastomosis followed by clamping of the right pulmonary artery proximal to the anastomosis; and Group 3: sham animals. Pressures of superior vena cava and pulmonary arteries were afterwards measured, in a resting condition as well as after induced pharmacological stress test.Results: In Group 1, superior vena cava pressure was significantly higher, while venous pressure in the inferior vena cava – right atrium district was constant or lower in comparison with the other groups. After stress test, the pressure in the superior vena cava and the heart rate both increased further, but the right ventricular, right atrial and pulmonary artery pressures remained similar to the values in a resting condition. This proved that the inferior vena cava return was well-preserved, and no venous hypertension was present in the inferior vena cava district even after stress test (good exercise tolerance.Conclusion: One and one half ventricle repair can be considered a good surgical strategy for maintaining a low pressure in the inferior vena cava district with potential for right ventricle growth, restoring the more physiological circulation in borderline or failing right ventricle conditions. The experiment presented a positive finding in favour of one and one half

Safety and Efficacy of the Gunther Tulip Retrievable Vena Cava Filter: Midterm Outcomes

International Nuclear Information System (INIS)

Hoffer, Eric K.; Mueller, Rebecca J.; Luciano, Marcus R.; Lee, Nicole N.; Michaels, Anne T.; Gemery, John M.

2013-01-01

PurposeTo evaluate of the medium-term integrity, efficacy, and complication rate associated with the Gunther Tulip vena cava filter.MethodsA retrospective study was performed of 369 consecutive patients who had infrarenal Gunther Tulip inferior vena cava filters placed over a 5-year period. The mean patient age was 61.8 years, and 59 % were men. Venous thromboembolic disease and a contraindication to or complication of anticoagulation were the indications for filter placement in 86 % of patients; 14 % were placed for prophylaxis in patients with a mean of 2.3 risk factors. Follow-up was obtained by review of medical and radiologic records.ResultsMean clinical follow-up was 780 days. New or recurrent pulmonary embolus occurred in 12 patients (3.3 %). New or recurrent deep-vein thrombosis occurred in 53 patients (14.4 %). There were no symptomatic fractures, migrations, or caval perforations. Imaging follow-up in 287 patients (77.8 %) at a mean of 731 days revealed a single (0.3 %) asymptomatic fracture, migration greater than 2 cm in 36 patients (12.5 %), and no case of embolization. Of 122 patients with CT scans, asymptomatic perforations were identified in 53 patients (43.4 %) at a mean 757 days.ConclusionThe Gunther Tulip filter was safe and effective at 2-year follow-up. Complication rates were similar to those reported for permanent inferior vena cava filters

Safety and Efficacy of the Gunther Tulip Retrievable Vena Cava Filter: Midterm Outcomes

Energy Technology Data Exchange (ETDEWEB)

Hoffer, Eric K., E-mail: eric.k.hoffer@hitchcock.org; Mueller, Rebecca J.; Luciano, Marcus R.; Lee, Nicole N.; Michaels, Anne T.; Gemery, John M. [Dartmouth-Hitchcock Medical Center, Department of Radiology, Section of Vascular and Interventional Radiology (United States)

2013-08-01

PurposeTo evaluate of the medium-term integrity, efficacy, and complication rate associated with the Gunther Tulip vena cava filter.MethodsA retrospective study was performed of 369 consecutive patients who had infrarenal Gunther Tulip inferior vena cava filters placed over a 5-year period. The mean patient age was 61.8 years, and 59 % were men. Venous thromboembolic disease and a contraindication to or complication of anticoagulation were the indications for filter placement in 86 % of patients; 14 % were placed for prophylaxis in patients with a mean of 2.3 risk factors. Follow-up was obtained by review of medical and radiologic records.ResultsMean clinical follow-up was 780 days. New or recurrent pulmonary embolus occurred in 12 patients (3.3 %). New or recurrent deep-vein thrombosis occurred in 53 patients (14.4 %). There were no symptomatic fractures, migrations, or caval perforations. Imaging follow-up in 287 patients (77.8 %) at a mean of 731 days revealed a single (0.3 %) asymptomatic fracture, migration greater than 2 cm in 36 patients (12.5 %), and no case of embolization. Of 122 patients with CT scans, asymptomatic perforations were identified in 53 patients (43.4 %) at a mean 757 days.ConclusionThe Gunther Tulip filter was safe and effective at 2-year follow-up. Complication rates were similar to those reported for permanent inferior vena cava filters.

Safety and efficacy of the Gunther Tulip retrievable vena cava filter: midterm outcomes.

Science.gov (United States)

Hoffer, Eric K; Mueller, Rebecca J; Luciano, Marcus R; Lee, Nicole N; Michaels, Anne T; Gemery, John M

2013-08-01

To evaluate of the medium-term integrity, efficacy, and complication rate associated with the Gunther Tulip vena cava filter. A retrospective study was performed of 369 consecutive patients who had infrarenal Gunther Tulip inferior vena cava filters placed over a 5-year period. The mean patient age was 61.8 years, and 59% were men. Venous thromboembolic disease and a contraindication to or complication of anticoagulation were the indications for filter placement in 86% of patients; 14% were placed for prophylaxis in patients with a mean of 2.3 risk factors. Follow-up was obtained by review of medical and radiologic records. Mean clinical follow-up was 780 days. New or recurrent pulmonary embolus occurred in 12 patients (3.3%). New or recurrent deep-vein thrombosis occurred in 53 patients (14.4%). There were no symptomatic fractures, migrations, or caval perforations. Imaging follow-up in 287 patients (77.8%) at a mean of 731 days revealed a single (0.3%) asymptomatic fracture, migration greater than 2 cm in 36 patients (12.5%), and no case of embolization. Of 122 patients with CT scans, asymptomatic perforations were identified in 53 patients (43.4%) at a mean 757 days. The Gunther Tulip filter was safe and effective at 2-year follow-up. Complication rates were similar to those reported for permanent inferior vena cava filters.

[Clinical analysis of patients with lower extremity deep venous thrombosis complicated with inferior vena cava thrombus].

Science.gov (United States)

Dong, Dian-ning; Wu, Xue-jun; Zhang, Shi-yi; Zhong, Zhen-yue; Jin, Xing

2013-06-04

To explore the clinical profiles of patients with lower extremity deep venous thrombosis (DVT) complicated with inferior vena cava (IVC) thrombus and summarize their clinical diagnostic and therapeutic experiences. The clinical characteristics, diagnosis and treatment of 20 hospitalized patients with DVT complicated with inferior vena cava thrombus were analyzed retrospectively. All of them were of proximal DVT. There were phlegmasia cerulea dolens (n = 3), pulmonary embolism (n = 3) and completely occlusion of IVC (n = 5). Clinical manifestations were severe. Retrievable inferior vena cava filter (IVCF) was implanted for 17 cases. Catheter-directed thrombolysis (CDT) through ipsilateral popliteal vein was applied for 7 cases and systemic thrombolysis therapy for 8 cases. The effective rate of thrombolysis for fresh IVC thrombus was 100%. Among 5 cases with Cockett Syndrome, 3 cases underwent balloon dilatation angioplasty and endovascular stenting of iliac vein. And 17 IVCFs were retrieved successfully within 3 weeks. IVC thrombus disappeared completely in 15 cases. Systemic or local thrombolysis with protective IVCF is a safe and effective therapy for nonocclusive IVC thrombus in DVT. And CDT is recommended for symptomatic occlusive IVC thrombus.

Marcação da Anexina V para imagem funcional da apoptose celular

OpenAIRE

Valente, Susana Catarina Monteiro

2011-01-01

Dissertação para obtenção do Grau de Mestre em Genética Molecular e Biomedicina O cancro colorrectal é a segunda principal causa de morte a nível mundial por neoplasia. A externalização da fosfatidilserina é um dos primeiros eventos da apoptose. Assim, o uso da Anexina V radiomarcada com 99mTecnécio torna-se num importante método de detecção e monitorização terapêutica de cancro in vivo. A 99mTc-HYNIC-Anexina V foi usada para detecção de apoptose em células do cancro colorrectal (WiDr) ...

Septic thrombosis of the inferior vena cava treated with percutaneous mechanical thrombectomy

NARCIS (Netherlands)

Burgmans, Mark C.; Rommes, Johannes H.; Spronk, Peter E.; van Nidek, Robert J. P. Brouerius; Bouma, Wim H.; Gratama, Jan Willem C.

2006-01-01

The present report describes a patient with septic thrombosis of the inferior vena cava (IVC) related to a subhepatic abscess adjacent to the IVC. Despite prolonged antimicrobial therapy and systemic anticoagulation, sepsis and septic embolism persisted while the size of the thrombus increased.

Teorías de enfermería para la investigación y la práctica en cuidado paliativo

OpenAIRE

Olga Janeth Gómez Ramírez; Gloria Mabel Carrillo González; Edier Mauricio Arias

2017-01-01

En este artículo se describen y analizan teorías de enfermería usadas para guiar la investigación y la práctica en cuidado paliativo, por medio de la investigación documental retrospectiva realizada con una ventana de observación de 15 años (1990-2015), y teniendo en cuenta criterios establecidos para los descriptores, teorías de enfermería y cuidado paliativo, que guian la investigación y la práctica en cuidado paliativo. Algunos artículos relacionados y...

First magnetic resonance imaging-guided aortic stenting and cava filter placement using a polyetheretherketone-based magnetic resonance imaging-compatible guidewire in swine: proof of concept.

Science.gov (United States)

Kos, Sebastian; Huegli, Rolf; Hofmann, Eugen; Quick, Harald H; Kuehl, Hilmar; Aker, Stephanie; Kaiser, Gernot M; Borm, Paul J A; Jacob, Augustinus L; Bilecen, Deniz

2009-05-01

The purpose of this study was to demonstrate feasibility of percutaneous transluminal aortic stenting and cava filter placement under magnetic resonance imaging (MRI) guidance exclusively using a polyetheretherketone (PEEK)-based MRI-compatible guidewire. Percutaneous transluminal aortic stenting and cava filter placement were performed in 3 domestic swine. Procedures were performed under MRI-guidance in an open-bore 1.5-T scanner. The applied 0.035-inch guidewire has a PEEK core reinforced by fibres, floppy tip, hydrophilic coating, and paramagnetic markings for passive visualization. Through an 11F sheath, the guidewire was advanced into the abdominal (swine 1) or thoracic aorta (swine 2), and the stents were deployed. The guidewire was advanced into the inferior vena cava (swine 3), and the cava filter was deployed. Postmortem autopsy was performed. Procedural success, guidewire visibility, pushability, and stent support were qualitatively assessed by consensus. Procedure times were documented. Guidewire guidance into the abdominal and thoracic aortas and the inferior vena cava was successful. Stent deployments were successful in the abdominal (swine 1) and thoracic (swine 2) segments of the descending aorta. Cava filter positioning and deployment was successful. Autopsy documented good stent and filter positioning. Guidewire visibility through applied markers was rated acceptable for aortic stenting and good for venous filter placement. Steerability, pushability, and device support were good. The PEEK-based guidewire allows either percutaneous MRI-guided aortic stenting in the thoracic and abdominal segments of the descending aorta and filter placement in the inferior vena cava with acceptable to good device visibility and offers good steerability, pushability, and device support.

First Magnetic Resonance Imaging-Guided Aortic Stenting and Cava Filter Placement Using a Polyetheretherketone-Based Magnetic Resonance Imaging-Compatible Guidewire in Swine: Proof of Concept

International Nuclear Information System (INIS)

Kos, Sebastian; Huegli, Rolf; Hofmann, Eugen; Quick, Harald H.; Kuehl, Hilmar; Aker, Stephanie; Kaiser, Gernot M.; Borm, Paul J. A.; Jacob, Augustinus L.; Bilecen, Deniz

2009-01-01

The purpose of this study was to demonstrate feasibility of percutaneous transluminal aortic stenting and cava filter placement under magnetic resonance imaging (MRI) guidance exclusively using a polyetheretherketone (PEEK)-based MRI-compatible guidewire. Percutaneous transluminal aortic stenting and cava filter placement were performed in 3 domestic swine. Procedures were performed under MRI-guidance in an open-bore 1.5-T scanner. The applied 0.035-inch guidewire has a PEEK core reinforced by fibres, floppy tip, hydrophilic coating, and paramagnetic markings for passive visualization. Through an 11F sheath, the guidewire was advanced into the abdominal (swine 1) or thoracic aorta (swine 2), and the stents were deployed. The guidewire was advanced into the inferior vena cava (swine 3), and the cava filter was deployed. Postmortem autopsy was performed. Procedural success, guidewire visibility, pushability, and stent support were qualitatively assessed by consensus. Procedure times were documented. Guidewire guidance into the abdominal and thoracic aortas and the inferior vena cava was successful. Stent deployments were successful in the abdominal (swine 1) and thoracic (swine 2) segments of the descending aorta. Cava filter positioning and deployment was successful. Autopsy documented good stent and filter positioning. Guidewire visibility through applied markers was rated acceptable for aortic stenting and good for venous filter placement. Steerability, pushability, and device support were good. The PEEK-based guidewire allows either percutaneous MRI-guided aortic stenting in the thoracic and abdominal segments of the descending aorta and filter placement in the inferior vena cava with acceptable to good device visibility and offers good steerability, pushability, and device support.

Replanteamiento de la Estrategia 100x100 a partir de un Índice de Desarrollo Humano para Localidades

Directory of Open Access Journals (Sweden)

Francisco José Zamudio-Sánchez

2016-01-01

Full Text Available En este artículo se presenta un índice para medir el desarrollo humano. Se toman como bases conceptuales los principios de Amartya Sen y, como forma operativa, una métrica estadística. Comparamos los resultados de un conjunto de municipios con el índice propuesto, contra los municipios incluidos en la denominada Estrategia 100x100. La selección indica que la estrategia debe ser modificada y que el índice propuesto se relaciona mejor con otros índices sociales actualmente usados. Nuestra metodología es muy general para construir un índice y puede ser usada para obtener medidas de otras características sociales.

Acute iliofemoral venous thrombosis in patients with atresia of the inferior vena cava can be treated successfully with catheter-directed thrombolysis

DEFF Research Database (Denmark)

Broholm, Rikke; Jørgensen, Maja; Just, Sven

2011-01-01

To assess the effectiveness and clinical outcomes of catheter-directed thrombolysis in patients with atresia of the inferior vena cava (IVC) and acute iliofemoral deep vein thrombosis (DVT).......To assess the effectiveness and clinical outcomes of catheter-directed thrombolysis in patients with atresia of the inferior vena cava (IVC) and acute iliofemoral deep vein thrombosis (DVT)....

Isolated persistent left superior vena cava: A case report and its clinical implications

Directory of Open Access Journals (Sweden)

Samarjit Bisoyi

2017-01-01

Full Text Available The venous anomaly of a persistent left superior vena cava (PLSVC affects 0.3%-0.5% of the general population. PLSVC with absent right superior vena cava, also termed as "isolated PLSVC," is an extremely rare venous anomaly. Almost half of the patients with isolated PLSVC have cardiac anomalies in the form of atrial septal defect, endocardial cushion defects, or tetralogy of Fallot. Isolated PLSVC is usually innocuous. Its discovery, however, has important clinical implications. It can pose clinical difficulties with central venous access, cardiothoracic surgeries, and pacemaker implantation. When it drains to the left atrium, it may create a right to left shunt. In this case report, we present the incidental finding of isolated PLSVC in a patient who underwent aortic valve replacement. Awareness about this condition and its variations is important to avoid complications.

Gestión pública para solucionar un problema ambiental: manejo de llantas de desecho en Ciudad Juárez

Directory of Open Access Journals (Sweden)

Gustavo Córdova Bojórquez

2012-01-01

Full Text Available La reutilización de llantas usadas es un problema ambiental cuando ya no es posible seguirlas usando y se consideran basura, que se almacena en casas, se deposita en tiraderos clandestinos y se tira en la vía pública. Se convierten en refugio de plagas, roedores e insectos vectores de enfermedades, además constituyen un riesgo para el entorno y la salud humana, peligro que se incrementa ante la posibilidad de un incendio. El objetivo del presente trabajo es analizar la gestión del manejo de la llanta de desecho en Ciudad Juárez, Chihuahua, hogar del mayor tiradero de llantas en la región fronteriza. Los resultados muestran que el gobierno ha tenido una participación mínima, hasta el momento en que se inicia un proceso de gestión mixta que involucra además al sector privado, al académico y a la sociedad civil; a partir de esta gestión mixta comienzan realmente acciones específicas para resolver el problema de la llanta usada.

Dialysis catheter-related superior vena cava syndrome with patent vena cava: Long term efficacy of unilateral viatorr stent-graft avoiding catheter manipulation

Energy Technology Data Exchange (ETDEWEB)

Quaretti, Pietro; Galli, Franco; Maramarco, Lorenzo Paplo; Corti, Riccardo; Leati, Giovanni; Fiorina, Ilaria; Maestri, Marcello [IRCCS Policlinico San Matteo Foundation, Pavia (Italy)

2014-06-15

Central venous catheters are the most frequent causes of benign central vein stenosis. We report the case of a 79-year-old woman on hemodialysis through a twin catheter in the right internal jugular vein, presenting with superior vena cava (SVC) syndrome with patent SVC. The clinically driven endovascular therapy was conducted to treat the venous syndrome with a unilateral left brachiocephalic stent-graft without manipulation of the well-functioning catheter. The follow-up was uneventful until death 94 months later.

Dialysis catheter-related superior vena cava syndrome with patent vena cava: Long term efficacy of unilateral viatorr stent-graft avoiding catheter manipulation

International Nuclear Information System (INIS)

Quaretti, Pietro; Galli, Franco; Maramarco, Lorenzo Paplo; Corti, Riccardo; Leati, Giovanni; Fiorina, Ilaria; Maestri, Marcello

2014-01-01

Central venous catheters are the most frequent causes of benign central vein stenosis. We report the case of a 79-year-old woman on hemodialysis through a twin catheter in the right internal jugular vein, presenting with superior vena cava (SVC) syndrome with patent SVC. The clinically driven endovascular therapy was conducted to treat the venous syndrome with a unilateral left brachiocephalic stent-graft without manipulation of the well-functioning catheter. The follow-up was uneventful until death 94 months later.

Control de ph para planta de tratamiento de aguas residuales

Directory of Open Access Journals (Sweden)

Wilson Fabián Amaya

2004-01-01

Full Text Available En este trabajo se presenta el problema de controlar el pH en una planta de tratamiento de aguas residuales (PTAR, la cual recibe soluciones ácidas provenientes de la producción de jugos (pH 2-5 que se dosifica con la sustancia usada para aseo (soda cáustica 0.04% con valores oscilatorios de pH 9-11. Se desarrolló e implementó un controlador clásico PI en un PLC comercial y se automatiza la PTAR mostrando el resultado obtenido en simulación en MatLAB.

Ultrasound Detection of Superior Vena Cava Thrombus

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Aaron Birch

2014-09-01

Full Text Available Superior vena cava (SVC syndrome is most commonly the insidious result of decreased vascular flow through the SVC due to malignancy, spontaneous thrombus, infections, and iatrogenic etiologies. Clinical suspicion usually leads to computed tomography to confirm the diagnosis. However, when a patient in respiratory distress requires emergent airway management, travel outside the emergency department is not ideal. With the growing implementation of point-of-care ultrasound (POCUS, clinicians may make critical diagnoses rapidly and safely. We present a case of SVC syndrome due to extensive thrombosis of the deep venous system cephalad to the SVC diagnosed by POCUS. [West J Emerg Med. 2014;15(6:715-718

[Bilateral deep venous thrombosis and vena cava aplasia treated with local thrombolysis

DEFF Research Database (Denmark)

Pelta, A.M.; Jørgensen, Maja; Just, Sven Richardt Lundgren

2008-01-01

In this case report the treatment of a young man with bilateral iliaco-femoral DVT and vena cava aplasia is presented. The patient was treated with catheter-directed thrombolysis; the catheters were introduced in the thrombus of both legs via v. popliteae. The treatment led to almost complete...

The Anatomical Correlation between the Internal Venous Vertebral System and the Cranial Venae Cavae in Rabbit.

Science.gov (United States)

Mazensky, David; Petrovova, Eva; Danko, Jan

2013-01-01

The aim of this study was to describe the possible variations in the connection between the internal venous vertebral system and the cranial vena cava in rabbit using corrosion technique. The study was carried out on 40 adult New Zealand white rabbits. The venous system was injected by using Batson's corrosion casting kit number 17. We found the connection between the internal venous vertebral system and the cranial vena cava by means of the vertebral veins and the right azygos vein. The vertebral vein was present as independent tributary in 36 cases (90%). In the rest of the cases, it was found as being double, being triple, or forming a common trunk with other veins. The azygos vein was present as independent tributary of the cranial vena cava in 39 cases (97.5%). We found also a common trunk formed by the junction of the deep cervical vein, the right vertebral vein, and the azygos vein in one case (2.5%). The azygos vein received 6, 7, 8, or 9 pairs of dorsal intercostal veins. Documenting the anatomical variations in the rabbit will aid in the planning of future experimental studies and determining the clinical relevance on such studies.

Leiomyosarcoma of the inferior vena cava level II involvement: curative resection and reconstruction of renal veins

Directory of Open Access Journals (Sweden)

Wang Quan

2012-06-01

Full Text Available Abstract Leiomyosarcoma of the inferior vena cava (IVCL is a rare retroperitoneal tumor. We report two cases of level II (middle level, renal veins to hepatic veins IVCL, who underwent en bloc resection with reconstruction of bilateral or left renal venous return using prosthetic grafts. In our cases, IVCL is documented to be occluded preoperatively, therefore, radical resection of tumor and/or right kidney was performed and the distal end of inferior vena cava was resected and without caval reconstruction. None of the patients developed edema or acute renal failure postoperatively. After surgical resection, adjuvant radiation therapy was administrated. The patients have been free of recurrence 2 years and 3 months, 9 months after surgery, respectively, indicating the complete surgical resection and radiotherapy contribute to the better survival. The reconstruction of inferior vena cava was not considered mandatory in level II IVCL, if the retroperitoneal venous collateral pathways have been established. In addition to the curative resection of IVCL, the renal vascular reconstruction minimized the risks of procedure-related acute renal failure, and was more physiologically preferable. This concept was reflected in the treatment of the two patients reported on.

Norma categorial para el español de Bogotá, Colombia

Directory of Open Access Journals (Sweden)

Albeiro Miguel Angel Ramirez Sarmiento

2011-09-01

Full Text Available En este trabajo presentamos los resultados de un estudio elaborado en Bogotá con 210 estudiantesuniversitarios de 5 instituciones con diferentes características sociodemográficas, con el fin de establecer las normas categoriales léxicas. Se utilizaron las 56 categorías léxicosemánticas usadas en el clásico estudio de Battig y Motague (1969 y se recogieron más de 7800 palabras que fueron organizadas por rango y moda. En la revisión bibliográfica realizada no se encontraron trabajos de esta naturaleza para el español colombiano (o latinoamericano, y se espera que sus resultados sean usados en protocolos para el campo de la terapia del lenguaje y los estudios psicolingüísticos. Los datos recogidos fueron comparados con uno de los estudios de norma categorial realizados para el español ibérico

Hepatic Veins and Inferior Vena Cava Thrombosis in a Child Treated by Transjugular Intrahepatic Portosystemic Shunt

International Nuclear Information System (INIS)

Carnevale, Francisco Cesar; Santos, Aline Cristine Barbosa; Tannuri, Uenis; Cerri, Giovanni Guido

2010-01-01

We report the case of a 9-year-old boy with portal hypertension, due to Budd-Chiari syndrome, and retrohepatic inferior vena cava thrombosis, submitted to a transjugular intrahepatic portosystemic shunt (TIPS) by connecting the suprahepatic segment of the inferior vena cava directly to the portal vein. After 3 months, the withdrawal of anticoagulants promoted the thrombosis of the TIPS. At TIPS revision, thrombosis of the TIPS and the main portal vein and clots at the splenic and the superior mesenteric veins were found. Successful angiography treatment was performed by thrombolysis and balloon angioplasty of a severe stenosis at the distal edge of the stent.

FOTOBIORREACTOR: HERRAMIENTA PARA CULTIVO DE CIANOBACTERIAS

Directory of Open Access Journals (Sweden)

Luis Guillermo Ramírez Mérida

2014-05-01

Full Text Available Las cianobactérias son organismos eficientes en la conversión de energía solar y producen una gran variedad de metabolitos. En la actualidad son el centro de atención para la producción de biocombustible, son usadas como biofertilizantes, control de contaminación ambiental y como fuente de nutrientes en alimentación humana y animal. Con el fin de proporcionar crecimiento y aprovechar el potencial de las cianobacterias, se requieren fotobiorreactores eficientes. Aunque se han propuesto muchos tipos de fotobiorreactores, no existe un reactor ideal, solo unos pocos pueden utilizarse para la producción de biomasa de cianobacterias. De hecho, la elección del fotobiorreactor más adecuado depende de la situación, ya que tanto las especies de algas disponibles y el destino final jugarán un papel importante. Uno de los principales factores que limita su aplicación práctica en cultivos de biomasa es la transferencia de masa. Por esto, entender el coeficiente de transferencia de masa en los fotobiorreactores es necesario para una operación eficiente del cultivo de biomasa en cianobacterias. En esta revisión, se discuten varios tipos de fotobiorreactores muy promisorios para la producción de biomasa de cianobacterias.

Entrapment of Guide Wire in an Inferior Vena Cava Filter: A Technique for Removal

International Nuclear Information System (INIS)

Abdel-Aal, Ahmed Kamel; Saddekni, Souheil; Hamed, Maysoon Farouk; Fitzpatrick, Farley

2013-01-01

Entrapment of a central venous catheter (CVC) guide wire in an inferior vena cava (IVC) filter is a rare, but reported complication during CVC placement. With the increasing use of vena cava filters (VCFs), this number will most likely continue to grow. The consequences of this complication can be serious, as continued traction upon the guide wire may result in filter dislodgement and migration, filter fracture, or injury to the IVC. We describe a case in which a J-tipped guide wire introduced through a left subclavian access without fluoroscopic guidance during CVC placement was entrapped at the apex of an IVC filter. We describe a technique that we used successfully in removing the entrapped wire through the left subclavian access site. We also present simple useful recommendations to prevent this complication.

Retrievable Guenther Tulip Vena Cava Filter in the prevention of pulmonary embolism in patients with acute deep venous thrombosis in perinatal period

Energy Technology Data Exchange (ETDEWEB)

Koecher, Martin [Department of Radiology, University Hospital, I.P. Pavlova 6, 775 20 Olomouc (Czech Republic)], E-mail: martin.kocher@seznam.cz; Krcova, Vera [Department of Hematooncology, University Hospital, I.P. Pavlova 6, 775 20 Olomouc (Czech Republic); Cerna, Marie [Department of Radiology, University Hospital, I.P. Pavlova 6, 775 20 Olomouc (Czech Republic); Prochazka, Martin [Department of Obstetrics and Gynaecology, University Hospital, I.P. Pavlova 6, 775 20 Olomouc (Czech Republic)

2009-04-15

Objectives: To evaluate the feasibility and efficacy of the retrievable Guenther Tulip Vena Cava Filter in the prevention of pulmonary embolism in patients with acute deep vein thrombosis in the perinatal period and to discuss the technical demands associated with the filter's implantation and retrieval. Methods: Between 1996 until 2007, eight women (mean age 27.4 years, range 20-42 years) with acute deep iliofemoral venous thrombosis in the perinatal period of pregnancy and increased risk of pulmonary embolism during delivery were indicated for retrievable Guenther Tulip Vena Cava Filter implantation. All filters were inserted and removed under local anesthesia from the jugular approach. Results: The Guenther Tulip Vena Cava Filter was implanted suprarenally in all patients on the day of caesarean delivery. In follow-up cavograms performed just before planned filter removal, no embolus was seen in the filter in any patient. In all patients the filter was retrieved without complications on the 12th day after implantation. Conclusions: Retrievable Guenther Tulip Vena Cava Filters can be inserted and removed in patients during the perinatal period without major complications.

Retrievable Guenther Tulip Vena Cava Filter in the prevention of pulmonary embolism in patients with acute deep venous thrombosis in perinatal period

International Nuclear Information System (INIS)

Koecher, Martin; Krcova, Vera; Cerna, Marie; Prochazka, Martin

2009-01-01

Objectives: To evaluate the feasibility and efficacy of the retrievable Guenther Tulip Vena Cava Filter in the prevention of pulmonary embolism in patients with acute deep vein thrombosis in the perinatal period and to discuss the technical demands associated with the filter's implantation and retrieval. Methods: Between 1996 until 2007, eight women (mean age 27.4 years, range 20-42 years) with acute deep iliofemoral venous thrombosis in the perinatal period of pregnancy and increased risk of pulmonary embolism during delivery were indicated for retrievable Guenther Tulip Vena Cava Filter implantation. All filters were inserted and removed under local anesthesia from the jugular approach. Results: The Guenther Tulip Vena Cava Filter was implanted suprarenally in all patients on the day of caesarean delivery. In follow-up cavograms performed just before planned filter removal, no embolus was seen in the filter in any patient. In all patients the filter was retrieved without complications on the 12th day after implantation. Conclusions: Retrievable Guenther Tulip Vena Cava Filters can be inserted and removed in patients during the perinatal period without major complications.

Right-sided superior vena cava draining into the left atrium: a rare anomaly of systemic venous return

International Nuclear Information System (INIS)

Aminololama-Shakeri, Shadi; Wootton-Gorges, Sandra L.; Reyes, Melissa; Moore, Elizabeth H.; Pretzlaff, Robert K.

2007-01-01

The most commonly encountered systemic thoracic venous anomaly is a persistent left superior vena cava that drains into the right atrium via the coronary sinus. A much rarer systemic venous anomaly is that of isolated anomalous drainage of a normally positioned right superior vena cava (RSVC) into the left atrium (LA). This has been reported in approximately 20 patients with the diagnosis usually being made by cardiac catheterization. We report the case of a toddler with asymptomatic hypoxemia resulting from anomalous drainage of a normal RSVC into his LA. This was diagnosed non-invasively by contrast-enhanced chest CT. (orig.)

Las marcas territoriales como alternativa para la diferenciación de productos rurales

Directory of Open Access Journals (Sweden)

Aranda Yesid

2007-12-01

Full Text Available

La globalización conduce a que el mercadeo de bienes y servicios agrarios se enfrente a una mayor competencia, toda vez que las fronteras desaparecen. Por esto, los mercados deben ser analizados cada vez más en términos desde lo local hacia lo global; en tal sentido es necesario que los productos vinculados con los territorios desarrollen estrategias de diferenciación susceptibles de ser usadas en términos comerciales en los mercados. En los últimos años, numerosas experiencias alrededor del mundo han mostrado cómo los territorios enfrentan la globalización mediante la construcción colectiva y desarrollo de denominaciones de origen y marcas compartidas que pueden ser vistas como marcas territoriales, las cuales son usadas como agregaciones de valor que poseen los productos para su comercio. Este artículo reflexiona acerca de los principales aspectos a tener en cuenta en la construcción y desarrollo de marcas territoriales, como son las normas y valores, innovación e identidad territorial; a su vez realiza un breve recuento de las experiencias y casos exitosos que han usado la identidad como aspecto diferenciador de productos de origen rural. Se plantean algunas reflexiones y retos para el desarrollo de políticas públicas que faciliten la construcción colectiva de imagen territorial en Colombia.

Placement of a Retrievable Guenther Tulip Filter in the Superior Vena Cava for Upper Extremity Deep Venous Thrombosis

International Nuclear Information System (INIS)

Nadkarni, Sanjay; Macdonald, Sumaira; Cleveland, Trevor J.; Gaines, Peter A.

2002-01-01

A retrievable Guenther Tulip caval filter(William Cook, Europe) was successfully placed and retrieved in the superior vena cava for upper extremity deep venous thrombosis in a 56-year-old woman. Bilateral subclavian and internal jugular venous thromboses thought secondary to placement of multiple central venous catheters were present. There have been reports of the use of permanent Greenfield filters and a single case report of a temporary filter in the superior vena cava. As far as we are aware this is the first reported placement and successful retrieval of a filter in these circumstances

Simon nitinol vena cava filters: effectiveness and complications

International Nuclear Information System (INIS)

Wolf, F.; Thurnher, S.; Lammer, J.

2001-01-01

Purpose: The aim of this retrospective analysis was to evaluate the clinical safety and effectiveness of the simon nitinol inferior vena cava filter (SNF) for prevention of pulmonary embolism. Patients and Methods: 117 patients (63 male, 54 female; aged 58.38 ± 14.59 years) underwent percutaneous implantation of an SNF from 1993 through 1999. Patient reports were retrospectively analysed for complications during and after implantation and deep venous thrombosis (DVT) and pulmonary embolism before and after implantation. Helical-CT with contrast media and plain abdominal radiography were performed on 35 patients, helical-CT alone on two patients. We checked the position and configuration of the SNF and looked for a perforation of the filter legs through the wall of the inferior vena cava (IVC). The IVC and deep pelvic veins were analysed for patency. Results: During implantation 10 of 117 (9%) patients had minor complications, major complications were reported in 0.9% (1/117). There was no significant increase in thrombosis of the deep pelvic veins and the IVC after implantation. Pulmonary re-embolism (PE) was documented in 9 out of 117 patients (7.7%). One out of the 35 examined patients (2.9%) showed a single strut fracture of the SNF. Tilting more than 15 was seen in 7 out of 37 patients (19%). Dislocation of the SNF more than 10 mm occurred in one out of 35 patients (2.9%), perforation through the wall of the IVC in all 37 patients. We found no occlusion of the IVC. (orig.) [de

Transection of the inferior vena cava from blunt thoracic trauma: case reports.

Science.gov (United States)

Peitzman, A B; Udekwu, A O; Pevec, W; Albrink, M

1989-04-01

Blunt thoracic trauma is a frequent cause of death in multiple trauma victims. Myocardial rupture may occur in up to 65% of patients who die with thoracic injuries. Two cases are presented with intrapericardial transection of the inferior vena cava, pericardial rupture, and myocardial rupture from blunt thoracic trauma. Both patients died.

Extreme premature with persistent left superior vena cava.

Science.gov (United States)

Aboitiz-Rivera, Carlos Manuel; Blachman-Braun, Ruben; Parra-Pérez, Mariana Yazmin

2017-10-01

Persistent left superior vena cava (PLSVC) is a congenital anomaly, that results when there is an absence of the normal regression of the left common precardinal vein during embryogenesis. Usually, this anomaly remains asymptomatic, however, when the PLSVC drains into the left atrium this could lead to a right-to-left shunt. Additionally, this can result in inadvertent delivery of air or thrombus into the systemic circulation with potential neurologic, cardiac and renal complications. In this article, we present a case of an extreme premature Mexican newborn in which the diagnosis was made after placement of a percutaneous central venues catheter.

Long-term success of endovascular treatment of benign superior vena cava occlusion with chylothorax and chylopericardium

Energy Technology Data Exchange (ETDEWEB)

Veroux, Pierfrancesco; Veroux, Massimiliano; Bonanno, Maria Giovanna; Tumminelli, Maria Giuseppina [Department of Surgery and Transplantation, University Hospital, Via S. Sofia, 78, 95123 Catania (Italy); Baggio, Elda [Department of Surgery and Gastroenterological Sciences, University Hospital of Verona (Italy); Petrillo, Giuseppe [Department of Radiology, University Hospital, Via S. Sofia, 78, 95123 Catania (Italy)

2002-07-01

The most likely etiology of benign obstruction of the superior vena cava (SVC) include fibrosing mediastinitis and iatrogenic etiologies such as sclerosis and obstruction caused by pacemakers and central venous catheter. Percutaneous stenting of SVC has been used with success both in malignant and benign superior vena cava syndrome; however, long-term follow-up of endovascular procedures is not well known. We present a case of a patient with complete occlusion of SVC of benign etiology, presenting dramatically with bilateral chylothorax and chylopericardium with cardiac tamponade, who underwent successful vena caval revascularization with thrombolytic therapy and placement of self-expanding metallic stent. The 42-month follow-up could encourage endovascular procedures even in SVC syndrome of benign etiology. (orig.)

Retrievable Günther Tulip Vena Cava Filter in the prevention of pulmonary embolism in patients with acute deep venous thrombosis in perinatal period.

Science.gov (United States)

Köcher, Martin; Krcova, Vera; Cerna, Marie; Prochazka, Martin

2009-04-01

To evaluate the feasibility and efficacy of the retrievable Günther Tulip Vena Cava Filter in the prevention of pulmonary embolism in patients with acute deep vein thrombosis in the perinatal period and to discuss the technical demands associated with the filter's implantation and retrieval. Between 1996 until 2007, eight women (mean age 27.4 years, range 20-42 years) with acute deep iliofemoral venous thrombosis in the perinatal period of pregnancy and increased risk of pulmonary embolism during delivery were indicated for retrievable Günther Tulip Vena Cava Filter implantation. All filters were inserted and removed under local anesthesia from the jugular approach. The Günther Tulip Vena Cava Filter was implanted suprarenally in all patients on the day of caesarean delivery. In follow-up cavograms performed just before planned filter removal, no embolus was seen in the filter in any patient. In all patients the filter was retrieved without complications on the 12th day after implantation. Retrievable Günther Tulip Vena Cava Filters can be inserted and removed in patients during the perinatal period without major complications.

Thrombosis caused by polyurethane double-lumen subclavian superior vena cava catheter and hemodialysis

DEFF Research Database (Denmark)

Wanscher, Maria Rørbæk; Frifelt, J J; Smith-Sivertsen, C

1988-01-01

During an 18-month period, 82 consecutive patients (37 women and 45 men), with a mean age of 50 yr (range 15 to 74), underwent hemodialysis with 91 polyurethane double-lumen subclavian superior vena cava catheters inserted via the right subclavian vein. Upon catheter removal, venograms were...

Wolff-Parkinson-White syndrome with an unroofed coronary sinus without persistent left superior vena cava treated with catheter cryoablation

Directory of Open Access Journals (Sweden)

Andrei Catanchin

2008-08-01

Full Text Available Coronary sinus anomalies are rare congenital defects which are usually coexistent with a persistent left superior vena cava and may be associated with cardiac arrhythmias. We report an unroofed coronary sinus without persistent left superior vena cava diagnosed during a catheter ablation procedure for Wolff-Parkinson-White syndrome. Diagnostic and therapeutic options and outcomes are discussed. This condition is of relevance to electrophysiologists performing catheter-based procedures, as well as cardiologists implanting coronary sinus pacing leads, who may encounter this anomaly in their practice.

Adrenocortical carcinoma with extension to the inferior vena cava and right atrium: 20-month-old girl with TP53 mutation

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Terry L. Levin, MD

2015-01-01

Full Text Available A 20-month-old female presented with respiratory distress and a right adrenal mass extending into the inferior vena cava and right atrium. The mass was initially thought to be neuroblastoma. Pathology later revealed adrenocortical carcinoma. Inferior vena cava extension is far more common in adrenocortical carcinoma than neuroblastoma, and its presence should prompt clinical and laboratory evaluation for an adrenocortical tumor. The genetic findings in TP53 associated with this disease are discussed.

Radiation-induced leiomyosarcoma of the great vessels presenting as superior vena cava syndrome

International Nuclear Information System (INIS)

Weiss, K.S.; Zidar, B.L.; Wang, S.

1987-01-01

A patient with a pleomorphic intravascular leiomyosarcoma of the great vessels of the neck and mediastinum presented clinically with a superior vena cava syndrome. A latent period of 29 years elapsed between receiving orthovoltage radiation to the neck and right side of chest to treat recurrent ganglioneuroblastoma, and the appearance of a leiomyosarcoma and subsequent recurrences. The patient underwent partial resection of the tumor, received adjunct chemotherapy, and was shown to be free of disease by clinical tests and by magnetic resonance imaging (MRI) 17 months after completion of chemotherapy. The criteria for the diagnosis of radiation-induced sarcomas are reviewed in relation to the present case. The critical role of magnetic resonance imaging in both the diagnosis and continued follow-up of the patient is described. This would appear to be the first reported case of radiation-induced intravascular leiomyosarcoma of the great vessels of the neck and mediastinum presenting as a superior vena cava syndrome

The Anatomical Correlation between the Internal Venous Vertebral System and the Cranial Venae Cavae in Rabbit

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David Mazensky

2013-01-01

Full Text Available The aim of this study was to describe the possible variations in the connection between the internal venous vertebral system and the cranial vena cava in rabbit using corrosion technique. The study was carried out on 40 adult New Zealand white rabbits. The venous system was injected by using Batson's corrosion casting kit number 17. We found the connection between the internal venous vertebral system and the cranial vena cava by means of the vertebral veins and the right azygos vein. The vertebral vein was present as independent tributary in 36 cases (90%. In the rest of the cases, it was found as being double, being triple, or forming a common trunk with other veins. The azygos vein was present as independent tributary of the cranial vena cava in 39 cases (97.5%. We found also a common trunk formed by the junction of the deep cervical vein, the right vertebral vein, and the azygos vein in one case (2.5%. The azygos vein received 6, 7, 8, or 9 pairs of dorsal intercostal veins. Documenting the anatomical variations in the rabbit will aid in the planning of future experimental studies and determining the clinical relevance on such studies.

The superior vena cava syndrome caused by malignant disease

International Nuclear Information System (INIS)

Eren, Suat; Karaman, Adem; Okur, Adnan

2006-01-01

Objective: The superior vena cava (SVC) obstruction by malignant diseases is either by direct invasion and compression or by tumour thrombus of the SVC. Whatever is its cause, obstruction of the SVC causes elevated pressure in the veins draining into the SVC and increased or reversed blood flow through collateral vessels. Severity of the syndrome depends on the collateral vascular system development. Therefore, imaging of the collateral veins with variable location and connection is important in determining the extension and management of the disease. Our aims are to describe collateral vessels of the superior vena cava syndrome (SVCS) related with the malignant diseases and to assess the ability of multi-detector row CT with multiplanar and 3D volume rendering techniques in determining and describing collateral circulations. Materials and methods: We present CT angiography findings of seven patients with small cell carcinoma of the lung (n = 2), squamous cell carcinoma of the lung (n = 3), Hodgkin disease of the thorax (n = 1), and squamous cell carcinoma of the oesophagus (n = 1). The patients received contrast-enhanced CT scans of the chest and abdomen on a multi-detector row CT during breath holding at suspended inspiration. Results: CT images revealed the cause and level of the SVC obstruction in all patients with axial and multiplanar reconstructed images. The SVC showed total obstruction in five patients and partial obstruction in two patients. The most common experienced collateral vessels were azygos vein (6), intercostal veins (6), mediastinal veins (6), paravertebral veins (5), hemiazygos vein (5), thoracoepigastric vein (5), internal mammary vein (5), thoracoacromioclavicular venous plexus (5), and anterior chest wall veins (5). While one case showed the portal-systemic shunt, V. cordis media and sinus coronarius with phrenic veins were enlarged in two cases, and the left adrenal vein was enlarged in a patient. In one case, the azygos vein with reversed

The superior vena cava syndrome caused by malignant disease

Energy Technology Data Exchange (ETDEWEB)

Eren, Suat [Department of Radiology, Faculty of Medicine, Atatuerk University, 25240 Erzurum (Turkey)]. E-mail: suateren@atauni.edu.tr; Karaman, Adem [Department of Radiology, Faculty of Medicine, Atatuerk University, 25240 Erzurum (Turkey); Okur, Adnan [Department of Radiology, Faculty of Medicine, Atatuerk University, 25240 Erzurum (Turkey)

2006-07-15

Objective: The superior vena cava (SVC) obstruction by malignant diseases is either by direct invasion and compression or by tumour thrombus of the SVC. Whatever is its cause, obstruction of the SVC causes elevated pressure in the veins draining into the SVC and increased or reversed blood flow through collateral vessels. Severity of the syndrome depends on the collateral vascular system development. Therefore, imaging of the collateral veins with variable location and connection is important in determining the extension and management of the disease. Our aims are to describe collateral vessels of the superior vena cava syndrome (SVCS) related with the malignant diseases and to assess the ability of multi-detector row CT with multiplanar and 3D volume rendering techniques in determining and describing collateral circulations. Materials and methods: We present CT angiography findings of seven patients with small cell carcinoma of the lung (n = 2), squamous cell carcinoma of the lung (n = 3), Hodgkin disease of the thorax (n = 1), and squamous cell carcinoma of the oesophagus (n = 1). The patients received contrast-enhanced CT scans of the chest and abdomen on a multi-detector row CT during breath holding at suspended inspiration. Results: CT images revealed the cause and level of the SVC obstruction in all patients with axial and multiplanar reconstructed images. The SVC showed total obstruction in five patients and partial obstruction in two patients. The most common experienced collateral vessels were azygos vein (6), intercostal veins (6), mediastinal veins (6), paravertebral veins (5), hemiazygos vein (5), thoracoepigastric vein (5), internal mammary vein (5), thoracoacromioclavicular venous plexus (5), and anterior chest wall veins (5). While one case showed the portal-systemic shunt, V. cordis media and sinus coronarius with phrenic veins were enlarged in two cases, and the left adrenal vein was enlarged in a patient. In one case, the azygos vein with reversed

Adult Wilms tumor with inferior vena cava thrombus and distal deep vein thrombosis - a case report and literature review.

Science.gov (United States)

Ratajczyk, Krzysztof; Czekaj, Adrian; Rogala, Joanna; Kowal, Pawel

2018-02-23

Adult Wilms tumor (WT, nephroblastoma) is a rare, but well-described renal neoplasm. Although inferior vena cava tumor thrombosis is present in up to 10% of Wilms tumors in childhood, only few cases of this clinical manifestation in adults have been reported. To the best of our knowledge, this is the first case of adult WT infiltrating into inferior vena cava (IVC) with concomitant distal deep vein thrombosis. A 28-year-old male patient with gross hematuria and right flank pain was diagnosed with right kidney tumor penetrating to IVC. Preoperatively, acute distal thrombosis in inferior vena cava and lower extremities veins occurred. Right radical nephrectomy with tumor thrombectomy via cavotomy was performed. In order to prevent pulmonary embolism, IVC was ligated below left renal vein level. Histopathological examination revealed a triphasic nephroblastoma without anaplastic features. Postoperatively, patient was diagnosed with metastatic liver disease, which was treated with two lines of chemotherapy followed by radiotherapy with achievement of complete response. Adult WT occurs usually in young patients, under 40 years of age. Neoadjuvant chemotherapy proved to be effective in children, resulting with tumor shrinkage and venous tumor thrombus regression. Therefore, percutaneous biopsy should be always considered in young patients presenting with renal tumor invading venous system. IVC ligation is a safe treatment option in the event of complete inferior vena cava occlusion due to distal thrombosis concomitant to tumor thrombus, provided collateral venous pathways are well-developed.

Abdominal wall phlebitis due to Prevotella bivia following renal transplantation in a patient with an occluded inferior vena cava.

Science.gov (United States)

Janssen, S; van Donselaar-van der Pant, K A M I; van der Weerd, N C; Develter, W; Bemelman, F J; Grobusch, M P; Idu, M M; Ten Berge, I J M

2013-02-01

Pre-existing occlusion of the inferior vena cava may complicate renal transplantation. Suppurative abdominal wall phlebitis following renal transplantation was diagnosed in a patient with pre-existing thrombosis of the inferior vena cava of unknown cause. The phlebitis developed in the subcutaneous collateral veins of the abdominal wall contra-laterally to the renal transplant. Cultures from abdominal wall micro-abscesses yielded Prevotella bivia as the causative agent. This complication has not been described before in the context of renal transplantation. The pathogenesis and management of this serious complication are discussed in this paper.

Técnica para preparo angioarquitetônico hepático de ratos Preparation technique for angioarquitetonic liver model in rats

Directory of Open Access Journals (Sweden)

Vitormauro Araújo da Silva

2000-09-01

Full Text Available Os métodos de injeção-corrosão são os principais métodos utilizados para o estudo da anatomia vascular do fígado. Alguns autores mencionam a técnica para estudo de fígado de cães, porcos, hamsters, coelhos e gatos, entretanto são escassos os trabalhos que mencionam o estudo da anatomia hepática de ratos. Desta forma é importante o conhecimento de novas técnicas de preparo para modelos angioarquitetônico de fígados, possibilitando um melhor conhecimento da anatomia e por conseguinte, aperfeiçoando significativamente a abordagem operatória deste órgão. Em função disso o objetivo do presente estudo é demonstrar a técnica para realização de angioarquitetura venosa do fígado de ratos. Foram utilizados 10 Rattus norvegicus albinus (Wistar, com massa corporal entre 250 e 300g, para verificar a funcionalidade do método. A técnica para preparo de modelo vascular apresenta três tempos fundamentais: cateterização da veia porta, veia cava intra-abdominal e veia cava intra-torácica; preparo e infusão da solução de acrílico; corrosão em ácido clorídrico e maceração da peça. Concluímos que, esta técnica é factível e apresenta como vantagem um baixo custo (30 dólares e com a utilização de duas cores diferentes de tinta pode-se separar o sistema vascular portal do sistema de drenagem supra-hepático, portanto sendo capaz de moldar a estrutura vascular hepática de ratos.The injection-erosion methods are the principal methods used for the study of the vascular anatomy of the liver. Some authors mention the technique for study of liver of dogs, pigs, hamsters, rabbits and cats, however they are scarce the works that mention the study of the hepatic anatomy of rats. This way it is important the knowledge of new preparation techniques for angioarquitetonic livers' models, making possible a better knowledge of the anatomy and consequently, improving the operative approach of this organ significantly. Due above of that

Radiotherapy of superior vena cava syndrome

International Nuclear Information System (INIS)

Kawanami, Shoko; Imada, Hajime; Terashima, Hiromi; Nakata, Hajime

1996-01-01

The records of 38 patients with superior vena cava syndrome (SVC syndrome) due to malignancy and who received radiation therapy were retrospectively reviewed. The majority were lung cancers, constituting 28 of the 38 cases (73.7%). All patients were treated with conventional radiation doses ranging from 20 to 70 Gy and good symptomatic response was observed in 31 cases (81.6% ). The response appeared within 1.7±0.9 weeks on average (3 days-4 weeks;, and performance status also improved in 50% of the patients. The median survival was 6.6 months. Long term survivors were seen mostly in patients with thymoma, and only one patient ever showed a recurrence of SVC syndrome. We conclude that radiotherapy can be an effective therapeutic modality for SVC syndrome and that it improves the quality of life in most patients. (author)

Bilateral inferior vena cava filter insertion in a patient with duplication of the infrarenal vena cava.

LENUS (Irish Health Repository)

Leong, S

2010-06-19

BACKGROUND: Inferior vena cava (IVC) filter insertion is a commonly performed procedure for indications such as recurrent pulmonary emboli or contraindication to anticoagulation. Symptomatic duplication of the IVC is exceedingly rare with only a handful of cases being described in the literature. AIM: We report an unusual case of a patient with symptomatic duplication of the IVC. RESULT: A 53-year-old woman presented at our hospital for resection of a cerebral metastasis from a non-small cell lung cancer following a recent diagnosis of bilateral lower limb deep venous thrombosis. This required perioperative reversal of anticoagulation and IVC filter insertion. Conventional venography performed during filter insertion documented the existence of a duplicated IVC. CONCLUSION: We present a case of a symptomatic duplication of the IVC requiring filter insertion. We review the developmental anatomy of the IVC along with the diagnostic findings and management strategies available.

A importancia das contas longas de vidro de origem mediterrânica recolhidas na "Baixa Pombalina" de Lisboa (Contribuição para o estudo de contas tipo "Nueva Cadiz"

OpenAIRE

M. Conceição RODRIGUES

2009-01-01

RESUMO: Pretendemos com este trabalho dar a nossa contribuição para o estudo das contas de vidro e introduzir novos dados e valores no estudo do comercio entre Portugal e o mundo africano, nomeadamente com a costa Ocidental da África , onde a permuta de pessoas, bens e ideias foi em parte determinante. Estes contactos permitiram alargar os horizontes socio-culturais entre diferentes povos e simultaneamente entre dois continentes para onde as contas de vidro foram levadas, permutadas e usadas....

Importance of a persisting left vena cava superior in pacemaker therapy

International Nuclear Information System (INIS)

Marosi, G.; Sagi, J.; Pokorny, L.; Simon, Z.; Orvostudomangi Egyetem, Szeged

1982-01-01

Basing on the description of a specific case and a review of literature, the article discusses the relationship between persisting left vena cava superior and pacemaker therapy. The article covers the technical problems caused by the vascular anomaly, the complications which can be expected, the possibilities in respect of recognising the vascular anomaly, as well as the methods for coping with the special situation prevailing in a particular case. (orig.) [de

Guenther Tulip Filter Retrieval from a Left-sided Inferior Vena Cava

International Nuclear Information System (INIS)

Brountzos, Elias N.; Kaufman, John A.; Lakin, Paul L.

2004-01-01

Optional (retrievable) inferior cava filters (IVC) may have advantages over permanent filters in a certain subset of patients, especially in view of recent concerns about the long-term thrombotic complications of the latter. Retrieval of the Guenther Tulip Filter (GTF), an optional filter, has been reported in a total of 76 patients. We present the first description of GTF retrieval from a left-sided IVC using the right internal jugular approach

Superior vena cava syndrome in hemodialysis patient

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Azeb Molhem

2011-01-01

Full Text Available Obstruction of blood flow in the superior vena cava (SVC results in symptoms and signs of SVC syndrome. SVC obstruction can be caused either by invasion or external compression of the SVC by contagious pathologic processes involving the right lung, lymph nodes, and other mediastinal structures, or by thrombosis of blood within the SVC. Occasionally, both mechanisms co-exist. We hereby report a case of a 28-year-old male, Saudi patient who was diagnosed with end-stage renal disease and was maintained on regular hemodiaysis via right jugular vein dual lumen catheter for ten months. Three years later, the patient presented with signs and symptoms suggestive of SVC obstruction that was successfully managed with SVC stenting.

El efecto de información engañosa para eventos emocionales: ¿cuán susceptibles son nuestras memorias?

OpenAIRE

Neufeld, Carmem Beatriz; Brust, Priscila Goergen; Stein, Lilian Milnitsky

2008-01-01

O presente trabalho visa fornecer evidências científicas da susceptibilidade das memórias a distorção através do estudo das falsas memórias (lembranças de eventos que, na realidade, não ocorreram) para situações emocionalmente carregadas. Foi usada a versão brasileira dos instrumentos e procedimentos de Cahill, Prins, Weber, e McGaugh e adaptada por Neufeld, Brust e Stein para a investigação do efeito da emoção na memória e nas falsas memórias. O experimento investigou o efeito de sugestão de...

Estrategias de reperfusión usadas en pacientes con síndrome coronario agudo con elevación persistente del segmento ST en un hospital general: Reperfusion strategies in patients with acute coronary syndrome and persistent ST-segment elevation in a general hospital

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Luis Borda-Velásquez

2015-01-01

Full Text Available Objetivos: Conocer las estrategias de reperfusión en pacientes con síndrome coronario agudo ST elevado (SCASTE atendidos en el departamento de emergencia de un hospital general, y determinar el tiempo para realizar dichas estrategias a través de los tiempos puerta-aguja (P-A, puerta-balón (P-B, electrocardiograma (ECG y total de isquemia. Material y métodos: Estudio retrospectivo transversal en pacientes con diagnóstico de SCASTE en el Hospital Nacional Cayetano Heredia (HNCH desde el 1° de enero de 2011 al 31 de enero de 2013. Se registraron las características demográficas y clínicas, tiempos de reperfusión miocárdica, de síntomas, para toma de ECG. Los factores asociados fueron analizados por análisis bivariado. Resultados: Cuarenta y cinco pacientes fueron elegibles. La edad media fue 60,5 ± 10,98 años, 88,8% fueron varones. El tiempo medio de hospitalización fue 9,79 ± 10,36 días. Se encontró obesidad (IMC ≥ 30 en 61,3%; hipertensión en 40,9%: tabaquismo en 43,1%; y diabetes mellitus II (DM II en 25%. El tiempo medio P-A de 57 ± 54,1 minutos; en 28,1% se administró el agente trombolítico antes de los 30 minutos. Angioplastia fue realizada en un paciente con un tiempo P-B de 440 minutos. El tiempo total de isquemia (TTI medio fue 244 ± 143,9 minutos. Conclusiones: Las estrategias de reperfusión fueron usadas en 71,1% de pacientes, siendo trombólisis la más usada; sin embargo, el tiempo P-A se encontró fuera del rango óptimo

Experimental evaluation of a new retrievable inferior vena cava filter for protection from acute pulmonary embolism in canine

International Nuclear Information System (INIS)

Zhou Chungao; Shi Haibing; Liu Sheng; Wang Chenghu; Liu Hairi; Li Linsun

2007-01-01

Objective: To evaluate the validity, safety and feasibility of a new retrieval inferior vena cava filter for the prevention of pulmonary embolism in an animal model. Methods: The model of deep iliofemoral venous thrombosis was established in 12 experimental dogs. In control group(6 experimental dogs), the deep venous thrombosis was made to fall off directly. In experimental group (6 experimental dogs), the deep venous thrombosis was made to fall off with an implanted filter in inferior vena cava. The filter's thrombus-trapping efficacy was evaluated by angiography of pulmonary artery, measurement of the mean pressure of pulmonary artery and arterial oxygen saturation before and after the deep venous thrombus falling off. Results: All filters implanted in the experimental dogs could successfully capture clot coming from deep venous thrombosis. There was no case of pulmonary embolism in experimental groups. On the other hand, pulmonary embolism occurred following the fall of deep venous thrombus in all dogs of control group. Conclusion: The retrievable inferior vena cava filter can effectively prevent from the pulmonary embolism due to falling off of the emboli from deep venous thrombosis. The process of implantation and retrieval is relatively simple and easy. (authors)

La argumentación abstracta en Inteligencia Artificial: problemas de interpretación y adecuación de las semánticas para la toma de decisiones

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Gustavo Adrián Bodanza

2015-11-01

Full Text Available El modelo de marcos argumentativos abstractos es actualmente la herramienta más utilizada para caracterizar la justificación de argumentos derrotables en Inteligencia Artificial. Las justificciones se determinan en base a los ataques entre argumentos y se formalizan a través de semánticas de extensiones. Aquí sostenemos que, o bien algunos marcos argumentativos carecen de sentido bajo ciertas concepciones de ataque específicas, o bien las semánticas más usadas en la literatura, basadas en el concepto de defensa conocido como admisibilidad, no resultan adecuadas para justificar, en particular, argumentos para la toma de decisiones.

El hejab (pañoleta islámica en el Irán actual: una visión de las mujeres respecto a su uso

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Masoumeh Velayati

2001-01-01

contrasta la literatura escrita por feministas musulmanas con las percepciones de algunas informantes. El trabajo concluye que el hejab obligatorio es una herramienta patriarcal usada por los hombres para controlar a las mujeres, mientras que el hejab voluntario es una herramienta usada por las mujeres para liberarse a sí mismas de las ataduras patriarcales y culturales y para legitimar su presencia en la vida pública, al tiempo que conservan sus tradiciones culturales.

Left kidney angiomyolipoma, spreading to the renal vein, inferior vena cava and involving the heart. Report of one case

OpenAIRE

INNOCENTI C, FRANCO; ALARCÓN C, EMILIO; ARIAS O, ESTEBAN; STOCKINS L, ALECK; SÁNCHEZ U, ROBERTO; MADARIAGA B, JAIME; TORRES-QUEVEDO Q, RODRIGO; CABRERA E, FELIPE; DÍAZ J, RAMÓN

2008-01-01

El angiomiolipoma renal es un tumor benigno mesenquimático. Constituyen sólo del 2 al 6% de los tumores renales. Existen alrededor de 12 casos reportados con invasión a las venas renales y la cava inferior. En menos de 5, hay extensión de trombo tumoral hasta aurícula derecha. Objetivo: Presentar el caso clínico, manejo y evolución de una paciente con un angiomiolipoma renal con extensión tumoral a vena renal y cava inferior y que compromete la cavidad auricular derecha casi en su totalidad. ...

Right-sided duplication of the inferior vena cava and the common iliac vein: hidden hinds in spiral-computed tomography; Rechtsseitige Dopplung der Vena cava inferior und Vena iliaca communis: Bildgebung mit der Spiral-Computertomographie

Energy Technology Data Exchange (ETDEWEB)

Meyer, D.R.; Friedrich, M. [Krankenhaus am Urban (Germany). Abt. fuer Roentgendiagnostik und Nuklearmedizin; Andresen, R. [Staedtisches Krankenhaus Zehlendorf, Behring (Germany). Abt. fuer Roentgendiagnostik und Nuklearmedizin

1998-05-01

Duplications of the inferior vena cava (IVC) are rare variants of the abdominal vessels and are normally located on both sides of the abdominal aorta. The rare case of a rightsided infrarenal duplication of the IVC with involvement of the common iliac vein is reported. Details of the embryology are presented for the understanding of this IVC variant. The spiral CT with multiplanar reconstructions makes it possible to define the vascular morphology and to differentiate it from lymphoma. (orig.) [Deutsch] Duplikaturen der Vena cava inferior (VCI) sind seltene meist bilateral der Aorta abdominalis gelegene abdominelle Gefaessvarianten. Der ungewoehnliche Fall einer rechtsseitigen infrarenalen Dopplung der VCI mit Beteiligung der Vena iliaca communis wird dargestellt. Auf der Embryologie wird, soweit fuer das Verstaendnis der vorliegenden VCI-Variante notwendig, eingegangen. Die Spiral-CT mit multiplanaren Rekonstruktionen erlaubt die morphologische Beschreibung der Gefaesssituation und die Differenzierung gegenueber Lymphomen. (orig.)

Inferior Vena Cava and Renal Vein Thrombosis Associated with Thymic Carcinoma

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Vlad Teodor Berbecar

2017-01-01

Full Text Available Thymic tumors are rare mediastinal tumors that can present with a wide variety of symptoms. They can cause distant manifestations and are frequently associated with paraneoplastic syndromes. In our case, we describe the evolution of a 68-year-old male whose first manifestation was thrombosis of the inferior vena cava and renal veins. Thrombosis of large abdominal veins is rare, especially without being associated with any other comorbidity or risk factors.

Anomalous inferior vena cava in association with omphalocele: a case report

Energy Technology Data Exchange (ETDEWEB)

Antoniou, E E.H. [Dept. of Pediatrics, School of Medicine, Univ. of Tokushima (Japan); Matsuoka, S [Dept. of Pediatrics, School of Medicine, Univ. of Tokushima (Japan); Mori, K [Dept. of Pediatrics, School of Medicine, Univ. of Tokushima (Japan); Hayabuchi, Y [Dept. of Pediatrics, School of Medicine, Univ. of Tokushima (Japan); Kuroda, Y [Dept. of Pediatrics, School of Medicine, Univ. of Tokushima (Japan)

1995-06-01

We present the case of a 6-year-old boy who had an omphalocele repaired at day 1 of life. He had a secundum atrial septal defect and an anomalous inferior vena cava of a type which has not been previously reported. Cine-MRI was a useful noninvasive tool for diagnosing the anomalous subaortic innominate vein and four immature vessels which make up the venous drainage systems of the lumbar region. (orig.)

Anomalous inferior vena cava in association with omphalocele: a case report

International Nuclear Information System (INIS)

Antoniou, E.E.H.; Matsuoka, S.; Mori, K.; Hayabuchi, Y.; Kuroda, Y.

1995-01-01

We present the case of a 6-year-old boy who had an omphalocele repaired at day 1 of life. He had a secundum atrial septal defect and an anomalous inferior vena cava of a type which has not been previously reported. Cine-MRI was a useful noninvasive tool for diagnosing the anomalous subaortic innominate vein and four immature vessels which make up the venous drainage systems of the lumbar region. (orig.)

Conrprop: un algoritmo para la optimización de funciones no lineales con restricciones

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Fernán Villa

2009-01-01

Full Text Available Resilent backpropagation (RPROP es una poderosa técnica de optimización basada en gradientes que ha sido comúnmente usada para el entrenamiento de redes neuronales artificiales, la cual usa una velocidad por cada parámetro en el modelo. Aunque esta técnica es capaz de resolver problemas de optimización multivariada sin restricciones, no hay referencias sobre su uso en la literatura de investigación de operaciones. En este artículo, se propone una modificación de resilent backpropagation que permite resolver problemas no lineales de optimización sujetos a restricciones generales no lineales. El algoritmo propuesto fue probado usando seis problemas comunes de prueba; para todos los casos, el algoritmo de resilent backpropagation restringido encontró la solución óptima, y para algunos casos encontró un punto óptimo mejor que el reportado en la literatura.

Omental flap transposition for inferior vena cava filter penetration

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Junji Yamaguchi, MD

2017-03-01

Full Text Available A 40-year-old woman presented with uterine malignancy, deep vein thrombosis, and nonmassive pulmonary embolism in both lungs. Gunter-tulip filter was inserted, because she had severe genital bleeding, which is one of the contraindications to anticoagulation therapy. Total hysterectomy was conducted and anticoagulation therapy was started afterward. The thrombus worsened perioperatively, and the filter could not be retrieved. Since there was lymph node recurrence, the second time operation was performed. During operation, the struts were found to be penetrating the inferior vena cava. Omental flap was used to cover the struts, and no associated complications occurred after operation.

Gallium SPECT detection of neoplastic intravascular obstruction of the superior vena cava

International Nuclear Information System (INIS)

Swayne, L.C.; Kaplan, I.L.

1989-01-01

A rare case of an intravascular neoplastic obstruction of the superior vena cava is discussed. The lesion was detected with gallium single photon emission computed tomography (SPECT) despite a normal appearance on a concurrent radiographic CT study. A computer-generated composite SPECT-CT image confirmed the intravascular localization of the radioisotope, and a subsequent CT-guided transthoracic needle biopsy revealed a poorly differentiated adenocarcinoma

Corylucinine, a new Alkaloid from Corydalis cava (Fumariaceae), and its Cholinesterase Activity

Czech Academy of Sciences Publication Activity Database

Novák, Z.; Chlebek, J.; Opletal, L.; Jiroš, Pavel; Macáková, K.; Kuneš, J.; Cahlíková, L.

2012-01-01

Roč. 7, č. 7 (2012), s. 859-860 ISSN 1934-578X Grant - others:SVV UK(CZ) 265002; SVV UK(CZ) 265001; FRVŠ(CZ) 664/2011; UNCE UK(CZ) 17/2012/ Institutional research plan: CEZ:AV0Z40550506 Keywords : Corydalis cava * corylucinine * 8-trichloromethyl-7,8-dihydropalmatine * acetylcholinesterase * butyrylcholinesterase * Alzheimer's disease Subject RIV: CC - Organic Chemistry Impact factor: 0.956, year: 2012

Deep venous thrombosis and agenesis of the intrahepatic segment of inferior vena cava

International Nuclear Information System (INIS)

Velasco, J.; Fernandez, M.M.; Manzanares, R.; Hernando, A.

1997-01-01

We present a case of agenesis of the intrahepatic segment of inferior vena cava (IVC) with drainage through the azygos and hemiazygos systems. The presenting sign was deep venous thrombosis (DVT) in both lower extremities. The different imaging studies led to the diagnosis of both the congenital and acquired venous abnormalities, which are discussed. (Author) 14 refs

CT findings of superior vena cava syndrome

Energy Technology Data Exchange (ETDEWEB)

Lim, Jun; Lee, Jae Mun; Kim, Choon Yul; Bahk, Yong Whee [Catholic Medical College, Seoul (Korea, Republic of)

1986-10-15

Since early 1980's high resolution CT has been used for detection of intrathoracic pathologic condition such as superior vena cava syndrome. Authors retrospectively analysed CT findings of 18 cases of proven SVC syndrome. The results were as follows: 1. The mean age was 50-year-old, and 14 cases were male. 2. Of 18 cases of SVC syndrome, 8 cases had confirmed to be lung cancers, malignant thymoma and teratoma were respectively each 2 cases, and malignant lymphoma, mediastinal abscess, thyroid adenoma and metastatic tumor were 1 case. 3. CT findings were A. Abnormal SVC consisted of compression with displacement (44.4%), intraluminal thrombus (27.8%), and encasement (27.8%). B. The collateral pathways were the azygos-homozygous (88.8%), vertebral (50%), internal mammary (44.4%), and lateral thoracic route (33.3%)

CT findings of superior vena cava syndrome

International Nuclear Information System (INIS)

Lim, Jun; Lee, Jae Mun; Kim, Choon Yul; Bahk, Yong Whee

1986-01-01

Since early 1980's high resolution CT has been used for detection of intrathoracic pathologic condition such as superior vena cava syndrome. Authors retrospectively analysed CT findings of 18 cases of proven SVC syndrome. The results were as follows: 1. The mean age was 50-year-old, and 14 cases were male. 2. Of 18 cases of SVC syndrome, 8 cases had confirmed to be lung cancers, malignant thymoma and teratoma were respectively each 2 cases, and malignant lymphoma, mediastinal abscess, thyroid adenoma and metastatic tumor were 1 case. 3. CT findings were A. Abnormal SVC consisted of compression with displacement (44.4%), intraluminal thrombus (27.8%), and encasement (27.8%). B. The collateral pathways were the azygos-homozygous (88.8%), vertebral (50%), internal mammary (44.4%), and lateral thoracic route (33.3%).

[The assessment of ultrasonic measurement of superior vena cava blood flow for the volume responsiveness of patients with mechanical ventilation].

Science.gov (United States)

Guo, Zhe; He, Wei; Hou, Jing; Li, Tong; Zhou, Hua; Xu, Yuan; Xi, Xiuming

2014-09-01

To approach the evaluative effect of respiratory variation of superior vena cava peak flow velocity measured using transthoracic echocardiography (TTE) on fluid responsiveness in patients with mechanical ventilation. A prospective cohort study was conducted. All mechanical ventilated critically ill patients whose fluid therapy was planned due to hypovolemia in Department of Critical Care Medicine of Beijing Tongren Hospital of Capital Medical University from April 2011 to April 2013 were enrolled. Volume expansion was performed with 500 mL Linger solution within 30 minutes. Patients were classified as responders if pulse pressure variation (PPV) increased ≥ 13% before volume expansion. The respiratory variation in superior vena cava peak velocity was calculated as the difference between maximum and minimum values of velocity in peak A, peak S and peak D over a single respiratory circle, and their variations (ΔA, ΔS, ΔD) were also calculated. The receiver operating characteristic curve (ROC curve) was plotted to assess the evaluative effect of respiratory variation of superior vena cava peak velocity on fluid responsiveness. Twenty-seven patients were enrolled in this study. Volume expansion increased PPV ≥ 13% happened in 14 patients (responders). The velocity of superior vena cava in peak A, peak S, peak D was significantly increased after volume expansion compared with that before volume expansion in responders [peak A (cm/s): 34.6 ± 2.2 vs. 31.3 ± 2.1, t=-2.493, P=0.027; peak S (cm/s): 39.1 ± 1.3 vs. 35.3 ± 2.1, t=-2.564, P=0.024; peak D (cm/s): 28.1 ± 1.2 vs. 23.3 ± 1.4, t=-4.995, P=0.000], but there was no significant difference in ΔA, ΔS and ΔD between before and after volume expansion. The ΔA, ΔS and ΔD were positively correlated with PPV (r=0.040, P=0.854; r=0.350, P=0.074; r=0.749, P=0.000). The area under ROC curve (AUC) of peak S was 0.36 [95% confidence interval (95%CI): 0.11-0.52], but the AUC of ΔS was 0.68 (95%CI 0.47-0.89), the

Prenatal diagnosis of long QT syndrome with the superior vena cava-aorta Doppler approach.

Science.gov (United States)

Chabaneix, Julie; Andelfinger, Gregor; Fournier, Anne; Fouron, Jean-Claude; Raboisson, Marie-Josée

2012-10-01

We describe a fetus at 36 weeks with long QT syndrome presenting with variable types of atrioventricular blocks, ventricular premature beats, and torsades de pointes. All these diagnoses were made with the superior vena cava-aorta Doppler approach and confirmed with postnatal electrocardiography. Copyright © 2012 Mosby, Inc. All rights reserved.

Cine computed tomography for diagnosis of superior vena cava obstruction following the mustard operation

International Nuclear Information System (INIS)

Matherne, G.P.; Atkins, D.L.; Frey, E.E.; Smith, W.L.

1987-01-01

Superior vena caval obstruction is a well described complication following Mustard's repair for transposition of the great arteries. We report a case of a 6-year-old child with superior vena cava obstruction correctly diagnosed by Cine-CT. The advantages of imaging with Cine-CT for this complication are discussed. (orig.)

Peïra-Cava: itinéraire d’un lieu touristique dans la moyenne montagne niçoise

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Christian Hélion

2000-09-01

Full Text Available A la fin du xixe siècle, la proximité et l’accessibilité de Peïra-Cava depuis Nice transforment en haut lieu touristique d’été et d’hiver un replat ouvert par l’armée frontalière dans la moyenne montagne azuréenne. L’itinéraire long et complexe de ce lieu aujourd’hui pratiquement en friche et le mythe de l’âge d’or qui s’y rattache, cachent la réalité de la dynamique territoriale: Peïra-Cava, annexe de Nice, ville d’hiver, s’inscrit désormais dans son aire de loisirs.

Inferior vena cava obstruction and shock

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Megri Mohammed

2018-01-01

Full Text Available Shock is one of the most challenging life-threatening conditions with high mortality and morbidity; the outcomes are highly dependent on the early detection and management of the condition. Septic shock is the most common type of shock in the Intensive Care Unit. While not as common as other subsets of shock, obstructive shock is a significant subtype due to well defined mechanical and pathological causes, including tension pneumothorax, massive pulmonary embolism, and cardiac tamponade. We are presenting a patient with obstructive shock due to inferior vena cava obstruction secondary to extensive deep venous thrombosis. Chance of survival from obstructive shock in our patient was small; however, there was complete and immediate recovery after treatment of the obstruction on recognizing the affected vessels. This case alerts the practicing intensivist and the emergency medicine physician to consider occlusion of the great vessels other than the pulmonary artery or aorta as causes of obstructive shock.

Polyphenol-Rich Fraction of Ecklonia cava Improves Nonalcoholic Fatty Liver Disease in High Fat Diet-Fed Mice

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Eun-Young Park

2015-11-01

Full Text Available Ecklonia cava (E. cava; CA is an edible brown alga with beneficial effects in diabetes via regulation of various metabolic processes such as lipogenesis, lipolysis, inflammation, and the antioxidant defense system in liver and adipose tissue. We investigated the effect of the polyphenol-rich fraction of E. cava produced from Gijang (G-CA on nonalcoholic fatty liver disease (NAFLD in high-fat diet (HFD-fed mice. C57BL6 mice were fed a HFD for six weeks and then the HFD group was administered 300 mg/kg of G-CA extracts by oral intubation for 10 weeks. Body weight, fat mass, and serum biochemical parameters were reduced by G-CA extract treatment. MRI/MRS analysis showed that liver fat and liver volume in HFD-induced obese mice were reduced by G-CA extract treatment. Further, we analyzed hepatic gene expression related to inflammation and lipid metabolism. The mRNA expression levels of inflammatory cytokines and hepatic lipogenesis-related genes were decreased in G-CA-treated HFD mice. The mRNA expression levels of cholesterol 7 alpha-hydroxylase 1 (CYP7A1, the key enzyme in bile acid synthesis, were dramatically increased by G-CA treatment in HFD mice. We suggest that G-CA treatment ameliorated hepatic steatosis by inhibiting inflammation and improving lipid metabolism.

Primary Leiomyosarcoma in the Inferior Vena Cava Extended to the Right Atrium: A Case Report and Review of the Literature

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Shuichi Fujita

2016-10-01

Full Text Available A 38-year-old woman had developed an abdominal distention, lower extremity edema, and dyspnea. Imaging examination revealed a large mass in the right atrium which was connected to lesions within the inferior vena cava. Although complete resection of the mass was not possible, partial surgical tumor resection was performed to avoid pulmonary embolization and circulatory collapse. Leiomyosarcoma was diagnosed histologically, and chemotherapy (doxorubicin followed by radiotherapy was started. By reviewing papers published in the past 10 years that included 322 patients, we also discuss the clinical presentations and prognosis of leiomyosarcoma in the inferior vena cava.

Treatment of pacemaker-induced superior vena cava syndrome by balloon angioplasty and stenting.

LENUS (Irish Health Repository)

Klop, B

2011-01-01

Superior vena cava (SVC) syndrome is a rare but serious complication after pacemaker implantation. This report describes three cases of SVC syndrome treated with venoplasty and venous stenting, with an average follow-up of 30.7 (±3.1) months. These cases illustrate that the definitive diagnosis, and the extent and location of venous obstruction, can only be determined by venography.

Concomitant Persistent Left Superior Vena Cava and Horseshoe Kidney

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Faraz Jaffer

2015-01-01

Full Text Available Persistent left superior vena cava (PLSVC and horseshoe kidney (HSK are common congenital abnormalities; however presence of both in the same person is extremely rare. A patient with hepatitis C cirrhosis awaiting transplant presented with worsening liver dysfunction, diagnosed with acute renal failure secondary to hepatorenal syndrome, and required X-ray fluoroscopy guided tunneled venous catheter placement for hemodialysis. Review of imaging studies demonstrated coexistence of PLSVC and HSK. PLSVC in adulthood is usually incidental with the most common drainage pattern being without physiologic dysfunction. Isolated horseshoe kidney is still the most common of renal fusion anomalies; however etiology of coexistent PLSVC remains unknown.

Indications, complications and outcomes of elderly patients undergoing retrievable inferior vena cava filter placement.

Science.gov (United States)

Rottenstreich, Amihai; Kleinstern, Geffen; Bloom, Allan I; Klimov, Alexander; Kalish, Yosef

2017-10-01

The utilization of inferior vena cava filter placement for pulmonary embolism prevention in elderly patients has not been well characterized. The present study aimed to review indications, complications and follow-up data of elderly patients undergoing inferior vena cava filter placement. A retrospective review was carried out of consecutive admitted patients who underwent inferior vena cava filter insertion at a large university hospital with a level I trauma center. Overall, 455 retrievable filters were inserted between 2009 and 2014. A total of 133 patients (29.2%) were aged ≥70 years. Elderly patients were less likely to have their filter retrieved compared with non-elderly patients (5.3% vs 21.4%, P Filter-related complications occurred in 13% of non-elderly patients and 14.3% of elderly patients (P = 0.72), most of them occurring in the first 3 months after filter placement. Survival among elderly patients with no evidence of active malignancy was similar to the non-elderly patients with a 1-year survival rate of 76.3% versus 82% in non-elderly patients (P = 0.22), and a 2-year survival rate of 73.1% versus 78.6% in non-elderly patients (P = 0.27). Although decreased, survival rates among elderly patients with active cancer were still substantial, with a 1-year survival rate of 45% and 2-year survival rate of 40%. Elderly patients had significantly lower rates of filter retrieval with similar complication rate. Survival rates among elderly patients were substantial, and in elderly patients with no active cancer were even comparable with non-elderly patients. When feasible, filter retrieval should be attempted in all elderly patients in order to prevent filter-related complications. Geriatr Gerontol Int 2017; 17: 1508-1514. © 2016 Japan Geriatrics Society.

Particle radiotherapy, a novel external radiation therapy, versus liver resection for hepatocellular carcinoma accompanied with inferior vena cava tumor thrombus: A matched-pair analysis.

Science.gov (United States)

Komatsu, Shohei; Kido, Masahiro; Asari, Sadaki; Toyama, Hirochika; Ajiki, Tetsuo; Demizu, Yusuke; Terashima, Kazuki; Okimoto, Tomoaki; Sasaki, Ryohei; Fukumoto, Takumi

2017-12-01

Hepatocellular carcinoma accompanied with inferior vena cava tumor thrombus carries a dismal prognosis, and the feasibility of local treatment has remained controversial. The present study aimed to compare the outcomes of particle radiotherapy and liver resection in patients with hepatocellular carcinoma with inferior vena cava tumor thrombus. Thirty-one and 19 patients, respectively, underwent particle radiotherapy and liver resection for hepatocellular carcinoma with inferior vena cava tumor thrombus. A matched-pair analysis was undertaken to compare the short- and long-term outcomes according to tumor stage determined using the tumor-node-metastasis classification. Both stages IIIB and IV (IVA and IVB) patients were well-matched for 12 factors, including treatment policy and patient and tumor characteristics. The median survival time of matched patients with stage IIIB tumors in the particle radiotherapy group was greater than that in the liver resection group (748 vs 272 days, P = .029), whereas no significant difference was observed in the median survival times of patients with stage IV tumors (239 vs 311 days, respectively). There were significantly fewer treatment-related complications of grade 3 or greater in the particle radiotherapy group (0%) than in the liver resection group (26%). Particle radiotherapy is potentially preferable in hepatocellular carcinoma patients with stage IIIB inferior vena cava tumor thrombus and at least equal in efficiency to liver resection in those with stage IV disease, while causing significantly fewer complications. Considering the relatively high survival and low invasiveness of particle radiotherapy when compared to liver resection, this approach may represent a novel treatment modality for hepatocellular carcinoma with inferior vena cava tumor thrombus. Copyright © 2017 Elsevier Inc. All rights reserved.

[Symmetrical phlebothrombosis of lower extremities resulting from congenital malformation of vena cava inferior].

Science.gov (United States)

Halcín, A; Kovácová, E; Mikla, F; Reptová, A; Bedeová, J

2009-12-01

Agenesis/atresia ofvena cava inferior is a rare congenital anomaly, caused by an aberrance of embryonal venous system development. This is in most cases asymptomatic, because of well developed collateral venous circulation. However, in some cases, it can be manifested with occurence of deep thrombosis in area of pelvis and lower limbs. In this case report, we repon a 21 year old male with painful swelling of both lower limbs. Ultrasonographic examination revealed a bilateral thrombosis in deep venous system of lower limbs and pelvis. Subsequent CT angiography showed atresia ofinfrarenal segment ofvena cava inferior. According to the CT image thrombotic proces affected also collateral venous system, that joined mostly to vena azygos and hemiazygos. Examination of coagulation system didn't reveal a procuring cause ofthrombotic occurrence. We realized a systemic trombolysis with streptokinase during 5 days. Starting from the fifth day we administered a low molecular weight heparin in anticoagulant dose. This treatment showed a good clinical effect. Pacient was discharged with a long-term oral warfarin therapy in combination with acetylsalicylic acid. In next four months of taking recommended therapy no relapse of thrombotic process nor evolvement of bleeding complication was observed.

Recidiva en vena cava inferior de carcinoma suprarrenal

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Javier Orrit

2005-01-01

Full Text Available Paciente de 15 meses sometido a resección de masa suprarrenal derecha. Estudio de extensión negativo e histología de tumor adrenocortical. Dos meses después presenta recidiva tumoral en vena cava inferior (VCI a nivel de venas suprahepáticas que se reseca bajo hipotermia profunda y parada circulatoria (19 min (Fig. 1. Se extrae una masa friable de 25 × 20 mm que ocluye la VCI, sin evidencia de resto tumoral, aunque se considera resección incompleta al estar infiltradas las paredes de VCI. La histología confirma carcinoma suprarrenal (Fig. 2. A los 5 meses sigue quimioterapia sin datos de nueva invasión de VCI.

Estudios voltamétricos en cultivos de células cromaffin para definir la liberación de catecolaminas al estímulo eléctrico

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Alberto Pinzón

2005-03-01

Full Text Available El trasplante de células es una de las técnicas más usadas en el área de la reparación neurológica.  Entre ellas, el trasplante de células cromaffin (CC, que se encuentran en el parénquima adrenal y son candidatas para la reparación de lesiones porque producen noradrenalina y otras catecolaminas (Unsicker, 1993.

Isolated persistent left-sided superior vena cava, giant coronary sinus, atrial tachycardia and heart failure in a child

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Nagaraja Moorthy

2013-09-01

Full Text Available Persistence of a left-sided superior vena cava (PLSVC with absent right superior vena cava (isolated PLSVC is a very rare venous malformation and commonly associated with congenital heart disease or alterations of the cardiac situs. We describe an unusual case of a young boy presenting with persistent atrial tachycardia and congestive heart failure. He was detected to have unexplained grossly dilated right atrium, right ventricle with systolic dysfunction and a giant coronary sinus (CS. The dilated CS closely mimicked a pseudo cor-triatriatum on echocardiography. Contrast echocardiography from both arms revealed opacification of the CS before the right atrium. Bilateral upper limb venography confirmed the presence of absent right SVC and isolated persistent left SVC draining into the giant coronary sinus.

Percutaneous Transluminal Angioplasty for Complete Membranous Obstruction of Suprahepatic Inferior Vena Cava: Long-Term Results

Energy Technology Data Exchange (ETDEWEB)

Kucukay, Fahrettin, E-mail: fkucukay@hotmail.com [Turkiye Yuksek Ihtisas Hospital, Department of Interventional Radiology (Turkey); Akdogan, Meral, E-mail: akdmeral@yahoo.com [Turkiye Yuksek Ihtisas Hospital, Department of Gastroenterology (Turkey); Bostanci, Erdal Birol, E-mail: ebbostanci@yahoo.com [Turkiye Yuksek Ihtisas Hospital, Department of Gastrointestinal Surgery (Turkey); Ulus, Ahmet Tulga, E-mail: uluss@yahoo.com [Hacettepe University, Department of Cardiovascular Surgery (Turkey); Kucukay, Murat Bulent, E-mail: dr-mbk@hotmail.com [Lokman Hekim Hospital, Department of Internal Medicine (Turkey)

2016-10-15

PurposeTo determine the long-term results of percutaneous transluminal angioplasty (PTA) for a complete membranous obstruction of the suprahepatic inferior vena cava.MethodsPatients (n = 65) who were referred to the interventional unit for PTA for a complete membranous obstruction of the suprahepatic inferior vena cava between January 2006 and October 2014 were included in the study. Thirty-two patients (18 males, 14 females, mean age 35 ± 10.7, range 20–42 years) were treated. The patients presented with symptoms of ascites (88 %), pleural effusion (53 %), varicose veins (94 %), hepatomegaly (97 %), abdominal pain (84 %), and splenomegaly (40 %). Transjugular liver access set and re-entry catheter were used to puncture and traverse the obstruction from the jugular side. PTA balloon dilations were performed. The mean follow-up period was 65.6 ± 24.5 months. The objective was to evaluate technical success, complications, primary patency, and clinical improvement in the symptoms of the patients.ResultsThe technical success rate was 94 %. In two patients, obstruction could not be traversed. These patients underwent cavoatrial graft bypass surgery. There were no procedure-related complications. Clinical improvements were achieved in all patients within 3 months. The primary patency rate at 4 years was 90 %. There was no primary assisted patency. There was no need for metallic stent deployment in the cohort. The secondary patency rate at 4 years was 100 %.ConclusionsPercutaneous transluminal angioplasty for a complete membranous obstruction of the suprahepatic inferior vena cava is safe and effective, and the long-term results are excellent.

Bird's Nest Filter Causing Symptomatic Hydronephrosis Following Transmural Penetration of the Inferior Vena Cava

International Nuclear Information System (INIS)

Stacey, C.S.; Manhire, A.R.; Rose, D.H.; Bishop, M.C.

2004-01-01

We report a case of symptomatic hydronephrosis caused by transcaval penetration of a Bird's Nest filter. Perforation of the wall of the inferior vena cava (IVC) following insertion of a caval filter is a well-recognized complication. Whilst two cases of hydronephrosis have been described with Greenfield filters, no case involving a Bird's Nest filter has been reported previously

Bilateral adrenal cystic neuroblastoma with superior vena cava syndrome and massive intracystic haemorrhage

International Nuclear Information System (INIS)

Pinarli, Faruk Guclu; Danaci, Murat; Diren, Baris; Tander, Burak; Rizalar, Riza; Dagdemir, Ayhan; Acar, Sabri

2004-01-01

Bilateral cystic adrenal tumours are a rare presentation of neuroblastoma. Intratumoural haemorrhage is a frequent finding in neuroblastoma, but is rarely symptomatic. We present an 11-month-old girl with predominantly cystic bilateral neuroblastomas and distant lymph-node metastasis. Massive intracystic haemorrhage and superior vena cava (SVC) syndrome were ominous prognostic factors, leading to death. Large tumours with intracystic haemorrhage might require a conservative approach. (orig.)

Computational Modeling of Blood Flow in the TrapEase Inferior Vena Cava Filter

Energy Technology Data Exchange (ETDEWEB)

Singer, M A; Henshaw, W D; Wang, S L

2008-02-04

To evaluate the flow hemodynamics of the TrapEase vena cava filter using three dimensional computational fluid dynamics, including simulated thrombi of multiple shapes, sizes, and trapping positions. The study was performed to identify potential areas of recirculation and stagnation and areas in which trapped thrombi may influence intrafilter thrombosis. Computer models of the TrapEase filter, thrombi (volumes ranging from 0.25mL to 2mL, 3 different shapes), and a 23mm diameter cava were constructed. The hemodynamics of steady-state flow at Reynolds number 600 was examined for the unoccluded and partially occluded filter. Axial velocity contours and wall shear stresses were computed. Flow in the unoccluded TrapEase filter experienced minimal disruption, except near the superior and inferior tips where low velocity flow was observed. For spherical thrombi in the superior trapping position, stagnant and recirculating flow was observed downstream of the thrombus; the volume of stagnant flow and the peak wall shear stress increased monotonically with thrombus volume. For inferiorly trapped spherical thrombi, marked disruption to the flow was observed along the cava wall ipsilateral to the thrombus and in the interior of the filter. Spherically shaped thrombus produced a lower peak wall shear stress than conically shaped thrombus and a larger peak stress than ellipsoidal thrombus. We have designed and constructed a computer model of the flow hemodynamics of the TrapEase IVC filter with varying shapes, sizes, and positions of thrombi. The computer model offers several advantages over in vitro techniques including: improved resolution, ease of evaluating different thrombus sizes and shapes, and easy adaptation for new filter designs and flow parameters. Results from the model also support a previously reported finding from photochromic experiments that suggest the inferior trapping position of the TrapEase IVC filter leads to an intra-filter region of recirculating

A case of coarctation of the aorta associated with the patent ductus arteriosus and the persistent left superior vena cava

Energy Technology Data Exchange (ETDEWEB)

Lee, Yoo Keun [Hanyang University College of Medicine, Seoul (Korea, Republic of)

1974-10-15

This is a case report of multiple congenital vascular anomalies in which coarctation of the aorta combined with the patent ductus arteriosus and the persistent left superior vena cava. The patient was a 15 year old girl and congenital heart disease was suspected during infancy. However, she heard the disease incurable, so she had been well with herb medicine until admission in our hospital. By physical examination and roentgenological studies including aortography, the diagnosis of the patent ductus arteriosus was detected and the coarctation of the aorta was suspected. The persistent left superior vena cava was found during surgery and it was proved roentgenologically by venography.

Estra: um corpus para o estudo do estilo da tradução

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Célia Magalhães

2014-12-01

Full Text Available Este artigo apresenta a evolução e as contribuições da pesquisa em estudos da tradução orientados para corpora no Brasil. Faz-se uma revisão dos trabalhos iniciais desenvolvidos no Laboratório Experimental de Tradução (LETRA, mostrando que a maioria deles adotava uma abordagem de linguística contrastiva da tradução e que as pesquisas, gradualmente, foram evoluindo para uma preocupação com a estilística tradutória e o estilo do tradutor literário. Também se relata a compilação de um corpus para o estudo do estilo da tradução, o ESTRA, projetado exclusivamente para esse fim. Mostra-se como a pesquisa de corpora do ESTRA promove a interdisciplinaridade nos estudos da tradução e introduz a triangulação de resultados de análises realizadas com procedimentos metodológicos das diferentes abordagens usadas para estudar o estilo. Descrevem-se procedimentos metodológicos novos, em especial a etiquetagem do corpus para algumas das categorias de estilo. Termina-se o artigo com uma visão crítica sobre o que tem sido feito até o presente, apresentando perspectivas futuras de pesquisa em estilística tradutória no LETRA.

Atypical leiomyoma arising in a hepatic vein with extension into the inferior vena cava and right atrium

International Nuclear Information System (INIS)

Dunlap, H.J.; Udjus, K.

1990-01-01

We report an atypical leiomyoma arising in a hepatic vein and extending into the inferior vena cava and right atrium in a fourteen year old boy. US, CT and MRI facilitated diagnosis and removal of this tumor. (orig.)

Modelagem estatística da precipitação mensal e anual e no período seco para o estado de Minas Gerais Statistical modeling of monthly, annual and dry season mean precipitation for the State of Minas Gerais

OpenAIRE

Carlos R. de Mello; Antônio M. da Silva

2009-01-01

Objetivou-se, com o presente estudo, ajustar modelos lineares para predição da precipitação média mensal (no período úmido) e anual e no período seco, baseados nas coordenadas geográficas (latitude e longitude) e altitude para o Estado de Minas Gerais. Aplicaram-se dados diários de precipitação, provenientes da Agência Nacional de Águas (ANA) de 209 estações meteorológicas, das quais 197 foram usadas para ajuste dos modelos e 12 para sua validação final. O coeficiente de determinação ajustado...

O desafio da interoperabilidade e as novas perspectivas para as bibliotecas digitais

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Luis Fernando Sayão

Full Text Available O acesso integrado e transparente a recursos informacionais heterogêneos, armazenados em bibliotecas digitais e repositórios digitais distribuídos e gerenciados de forma autônoma por instituições diferentes, é um dos grandes desafios das pesquisas na área de bibliotecas digitais. Dentro dessa perspectiva, o trabalho revisa os principais problemas de interoperabilidade entre bibliotecas digitais: os tipos de soluções, os níveis de interoperabilidade, a arquitetura de sistemas federados, a questão dos direitos autorais e os parâmetros de avaliação. Considera também como as tecnologias da informação e a Web Semântica estão sendo usadas para desenvolver sistemas de bibliotecas digitais interoperáveis. Conclui relacionando as principais questões ainda em aberto e que estão, no momento, sendo objetos de pesquisa para implementação da próxima geração de bibliotecas digitais.

El Enfoque Bilingüe en la Educación de Sordos: sus implicancias para la enseñanza y aprendizaje de la lengua escrita

OpenAIRE

Lissi,María Rosa; Svartholm,Kristina; González,Maribel

2012-01-01

En este artículo se revisan algunos antecedentes sobre el enfoque bilingüe en la educación de sordos, se describe específicamente cómo ha sido implementado en Suecia, y se hace referencia a la incorporación de este enfoque en la educación de sordos en Chile. Posteriormente, se analiza la forma en que la Lengua de Señas puede ser usada para enseñar la lengua escrita en contextos educativos bilingües, a través del análisis de ejemplos tomados de clases para niños de primer ciclo básico en una e...

Systematic review and meta-analysis of persistent left superior vena cava on prenatal ultrasound: associated anomalies, diagnostic accuracy and postnatal outcome.

Science.gov (United States)

Gustapane, S; Leombroni, M; Khalil, A; Giacci, F; Marrone, L; Bascietto, F; Rizzo, G; Acharya, G; Liberati, M; D'Antonio, F

2016-12-01

high-risk pregnancies, the rate of associated abnormalities is likely to be higher than that in the general population of fetuses with PLSVC, for which more data are needed. Revisión sistemática y metaanálisis de la persistencia de la vena cava superior izquierda en la ecografía prenatal: anomalías asociadas, precisión del diagnóstico y resultado postnatal RESUMEN OBJETIVOS: Cuantificar la prevalencia de anomalías cromosómicas en fetos con vena cava superior izquierda persistente (VCSIP), evaluar la solidez de la asociación entre la VCSIP y la coartación aórtica, y determinar la precisión del diagnóstico de la ecografía prenatal como método para identificar correctamente casos aislados de VCSIP. MÉTODOS: Se buscó en las bases de datos de MEDLINE, EMBASE, CINHAL y Cochrane artículos publicados desde el año 2000 en adelante, usando combinaciones de las palabras clave "vena cava superior izquierda" y "resultado". Dos de los autores revisaron de forma independiente todos los resúmenes encontrados. La evaluación de calidad de los estudios incluidos se realizó mediante la escala Newcastle-Ottawa para estudios de cohortes. Se analizaron las tasas de los siguientes resultados: anomalías cromosómicas; anomalías intracardíacas (AIC) y anomalías extracardíacas (AEC) asociadas diagnosticadas prenatalmente; AIC y AEC adicionales detectadas sólo en ecografías postnatales o mediante evaluación clínica, pero no observadas en ecografías prenatales; y la asociación entre la VCSIP y la coartación aórtica. Se utilizó un meta-análisis de proporciones para combinar los datos. En total, se identificaron 2708 artículos y se incluyeron 13 (n = 501) en la revisión sistemática. En la ecografía prenatal o en una revisión de seguimiento se detectaron AIC y AEC asociadas en el 60,7% (IC 95%, 44,2-75,9%) y el 37,8% (IC 95%, 31,0-44,8%) de los casos, respectivamente. Se produjeron anomalías cromosómicas en el 12,5% (IC 95%, 9,0-16,4%) de los casos en

Reverse Trendelenburg position is a safer technique for lowering central venous pressure without decreasing blood pressure than clamping of the inferior vena cava below the liver.

Science.gov (United States)

Yoneda, Godai; Katagiri, Satoshi; Yamamoto, Masakazu

2015-06-01

Bleeding remains an important intraoperative complication in patients who undergo hepatectomy. It is generally believed that a reduction in central venous pressure will decrease bleeding from the hepatic venous system. To our knowledge, however, no study has compared the effectiveness of these techniques for controlling bleeding. So we compared the effectiveness of central venous pressure control techniques, such as infrahepatic inferior vena cava clamping, changes in surgical position of the patient, and hypoventilation anesthesia, for lowering central venous pressure. The study group comprised 50 patients who underwent hepatectomy in our department from 2012 through 2013. A central venous catheter was inserted into the right internal jugular vein, and the tip was placed in the superior vena cava. A transducer was placed along the mid-axillary line of the left side of the chest. After opening the abdomen, changes in central venous pressure were measured during inferior vena cava clamping, the reverse Trendelenburg position, the Trendelenburg position, and hypoventilation anesthesia. The inclination relative to the transducer, as measured with an inclinometer, was -10 degrees for the Trendelenburg position and +10 degrees for the reverse Trendelenburg position. The tidal volume was set at 10 mL/kg during conventional anesthesia and 5 mL/kg during hypoventilation anesthesia. The mean central venous pressure was 8.0 cm H(2)O in the supine position during conventional anesthesia, 5.0 cm H(2)O during inferior vena cava clamping, 5.6 cm H(2)O during reverse Trendelenburg position, 10.6 cm H(2)O during Trendelenburg position, and 7.6 cm H(2)O during hypoventilation anesthesia. The mean central venous pressure during inferior vena cava clamping and reverse Trendelenburg position was significantly lower than that during supine position (P = 0.0017 and P = 0.0231, respectively). The mean central venous pressure during hypoventilation

Implementación de una Carta de Control para Corridas Cortas en la Industria de AutopartesImplementation of a short Run chart in the Auto Parts Industry

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Jesús Fidernan Barrera Cobos

2016-01-01

Full Text Available Contexto: La industria nacional tiene que adaptarse a las necesidades del mercado, lo que implica en algunos casos el cambio en la realización de sus procesos productivos. Uno de estos cambios tiene que ver con el tamaño de lote de producción, el cual ha pasado de un tamaño de miles de unidades a uno quizas, de algunos cientos. El seguimiento de estos procesos con métodos estadísticos, como las cartas de control, ha llevado al uso de las denominadas cartas de control para lotes pequeños. Método: En este artículo se presenta la propuesta de implementación de una carta de este tipo en un proceso de fabricación de una empresa del sector automotriz nacional. Inicialmente se plantea el estado actual del proceso, el cual se sigue con una carta de control  - R, usada por la empresa para el seguimiento de la producción; luego se hace mención a algunas de las cartas de control para lotes pequeños, que han sido planteadas por diversos autores. Resultados: Con base en la información del estado actual del proceso se realiza la elección de la carta para lotes pequeños más adecuada. Conclusiones: Dadas las características de no homogeneidad de la varianza, determinada mediante una prueba no paramétrica para las referencias analizadas, se decide que la carta a ser usada es la normalizada. De las tres propuestas de carta presentadas la decisión de cuál usar depende de la varianza del proceso al fabricar las distintas referencias.

'Pseudothrombus' of the inferior vena cava

International Nuclear Information System (INIS)

Takebayashi, Shigeo; Odagiri, Kunio; Matsui, Kengo; Hayano, Ikuo.

1983-01-01

Normal Inferior Vena Cava (IVC) of 15 cases were studies on CT with bolus injection in the foot vein.FWell dilated IVC were obtained on scan both at full-inspiration and full-expiration. As the normal findings of IVC, different opacification patterns which may be designate ''homogenous'', ''layered'' and ''pseudothrombus'' were obtained. The ''homogenous'' opacification was noted both at full-inspiration and full-expiration. In homogenous patterns as noted as ''layered'' and ''pseudothrombus'' were suspected to occur in the case of insufficient mixing of contrast agent with blood and/or insufficient amount of contrast agent. And both these patterns were observed in dilated IVC. The ''layered'' opacified IVC was shown on scan at full-inspiration at which respiratory phase the blood flow in IVC may decrease.FThe ''pseudothrombus'' pattern was generally noted at full-expiration at which the blood flow may increase.FAlthough bolus injection of contrast agent into foot vein is useful for evaluation of IVC, one shound be aware of normal opacification of IVC including ''pseudothrombus'' pattern. (author)

Patent abdominal subcutaneous veins caused by congenital absence of the inferior vena cava: a case report

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Lipp Rainer W

2010-07-01

Full Text Available Abstract Introduction Patent paraumbilical and abdominal subcutaneous veins are found frequently as collaterals in patients due to portal hypertension mainly in liver cirrhosis. Case presentation For evaluation of portal hypertension in a 72-year-old Caucasian man without liver cirrhosis, magnetic resonance imaging with gadolinium contrast-enhancement was performed and demonstrated a missing inferior vena cava. A blood return from the lower extremities was shown through enlarged collateral veins of the abdominal wall, vena azygos and hemiazygos continuation, and multiple liver veins emptying into the right cardiac atrium. We describe a rare case of abdominal subcutaneous wall veins as collaterals caused by a congenitally absent infrarenal inferior vena cava with preservation of a hypoplastic suprarenal segment. Conclusion Knowledge of these congenital variations can be of clinical importance and it is imperative for the reporting radiologist to identify these anomalies as they can have a significant impact on the clinical management of the patient.

Safety of Ecklonia cava phlorotannins as a novel food pursuant to Regulation (EC) No 258/97

DEFF Research Database (Denmark)

Sjödin, Anders Mikael

2017-01-01

/97. The novel food is a phlorotannin-rich alcohol extract of Ecklonia cava, which is an edible marine brown alga species. The information provided on the composition, the specifications, the production process and the batch-to-batch variability of the novel food is sufficient and does not raise safety concerns......Following a request from the European Commission, the EFSA Panel on Dietetic Products, Nutrition and Allergies (NDA) was asked to deliver a scientific opinion on the safety of Ecklonia cava phlorotannins (marketed as SeaPolynolTM) as a novel food submitted pursuant to Regulation (EC) No 258....... The intention is to market the novel food as a food supplement for healthy individuals over the age of 12 years. A subchronic repeated dose oral toxicity study in rodents tested the novel food at daily doses of 0, 375, 750 and 1,500 mg/kg body weight (bw). The Panel considers the middose as the no...

Aplicação e potencial das tecnologias de micronização e emulsificação para o processamento de produtos alimentícios e farmacêuticos = : Applications and potential of micronization and emulsification technologies in food and pharmaceutical processing

OpenAIRE

Maria Thereza de Moraes Santos Gomes Rosa

2015-01-01

Resumo: O presente trabalho de doutorado está dividido em dois temas principais, um sobre o uso da tecnologia supercrítica para a formação de partículas e outro sobre o uso do ultrassom para a formulação de emulsões. A revisão da literatura sobre o estado da arte do emprego do CO2 supercrítico para formação de micro e nanopartículas e encapsulação mostrou as potencialidades do uso desta tecnologia. A unidade usada para os experimentos de micronização via tecnologia supercrítica foi desenvolvi...

Propuesta metodológica para la enseñanza de las matemáticas

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María Teresa Vargas Moreno

2015-02-01

Full Text Available RESUMEN El problema d ela enseñanza de las matemáticas en muchas de las carreras de formación profesional, es que no se ha enfocado hacia la apropiación de conceptos. Cambiar este enfoque requiere replantear cotnenidos y cambiar la metodología. La matemática debe enseñarse como disciplina intelectual par que pueda ser usada como herramienta. Ella debe inducir el desarrollo de las estructuras elementales del pensamiento matemático y contribuir a la formación de hábitos de razonamiento y claridad mental para afrontar problemas con agilidad, creatividad y hábitos de autoestudio.

La fotografía periodística como fuente para la representación historiográfica. El análisis de la imagen en la protesta estudiantil durante la segunda mitad del siglo XX

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Álvaro Acevedo Tarazona

2014-01-01

Full Text Available Al considerar los análisis que hay sobre la fotografía periodística para ser usada como fuente en la representación historiográfica, a partir de un razonamiento de la estructura interna y externa de la imagen, este artículo tiene la intención de promover un estudio respecto del uso adecuado de este tipo de fuentes. El propósito es alentar y sensibilizar a los historiadores e investigadores de las Ciencias Sociales para que tengan la disposición de recurrir a las imágenes como fuente para su trabajo.

Percutaneous insertion of inferior vean cava filter:clinical results of 8 patients

International Nuclear Information System (INIS)

Bae, Kyung Soo; Shin, Hyun Woong; Park, No Hyuck; Ryeom, Hun Kyu; Kim, Yong Joo

1997-01-01

To evaluate the efficacy and clinical results of percutaneous insertion of inferior vena cava(IVC) filter. Over a two year period, eight IVC filters were placed in eight patients with pulmonary thromboembolism resulting from deep vein thrombosis of the legs. The indications for placement were contraindication to anticoagulation(3), and recurrent pulmonary embolism during anticoagulant therapy(5). Both femoral(7) and jugular(1) routes were used for percutaneous transvenous insertion. To delineate the caval anatomy and to ensure placement just caudal to the renal vein, a cavogram was obtained before filter placement. Bird's Nest (7) and Greenfield (1) filters were inserted. Follow-up information was obtained by means of duplex sonography, CT scan, abdominal radiograph, and perfusion scan of the lungs, followed by clinical evaluation. In all cases, procedures were technically successful. Placement complications occurred in three patients. In one, the filter was inadvertently placed above the iliac bifurcation; in the other two, prolapse of the Bird's Nest filter wire occurred. Occlusion of IVC occurred in two patients, and recurrent pulmonary embolism was suspected in one, who suffered from chest pain and short-ness of breath. In the other patients, there was no clinical evidence of recurrence of the pulmonary embolism. Insertion of an inferior vena cava filter is a safe and effective method for the prevention of pulmonary embolism when anticoagulant therapy is either ineffective or contraindicated

Intraoperative radiation in the canine para-aortic abdomen

International Nuclear Information System (INIS)

Hoopes, P.J.; Gillette, E.L.

1984-01-01

Twenty adult beagle dogs received intraoperatively delivered 6 MeV electrons to the para-aortic abdomen and bladder. The dogs were equally divided into 4 dose groups receiving 22 Gy, 30 Gy, 38.5 Gy and 47 Gy. The 5 cm x 8 cm radiation field included a variable portion of the left kidney, the left ureter, the abdominal aorta and vena cava, the base of the bladder and the left sciatic and femoral nerves. The lesions observed were fibroelastic proliferation of the aortic intima, severe renal atrophy and fibrosis, ureteral stenosis, bladder fibrosis and demyelinating peripheral neuropathies. Histologic, morphometric and dose response analyses are compared with responses of dogs receiving more conventional fractionated doses to a total of 60 Gy, 70 Gy or 80 Gy x-ray in 6 weeks

PROPUESTA METODOLÓGICA PARA REALIZAR MAPAS DE CONOCIMIENTO

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MARCO DUEÑAS

2012-01-01

Full Text Available Recientemente Chavalarias y Cointet (2008 propusieron una metodología para construir mapas de conocimiento. En dicho estudio el corpus de información se construye a partir de un conjunto de palabras clave fijas y determinadas de forma exógena. En este artículo se replica esta metodología, pero a diferencia, el conjunto de palabras clave es construido a través de búsquedas recurrentes y relacionadas. Así, iniciando con un conjunto reducido de palabras clave pertenecientes a un paradigma científico se construye un corpus de artículos, los cuales a su vez citan otras palabras clave que son usadas como insumo para una segunda búsqueda. Este estudio tomó como base artículos relacionados con aplicaciones satelitales. La metodología propuesta permite de igual forma construir mapas de conocimiento, o determinar los campos paradigmáticos (Chavalarias y Cointet, 2008, es decir se obtienen clusters conectados, compuestos de palabras relacionadas entre sí bajo un criterio específico de proximidad y de interrelación, que vistos de forma global permiten identificar áreas específicas del conocimiento.

Haematogenous tumour growth in the inferior vena cava in a patient with a nonseminomatous testicular tumour

NARCIS (Netherlands)

Ham, S J; Koops, H Schraffordt; Sleijfer, D T; Freling, N M; Molenaar, W M

1991-01-01

The case history is reported of a patient with an invasion of the inferior vena cava by metastases of a non-seminomatous testicular tumour. He was treated with combination chemotherapy, followed by laparotomy and resection of residual tumour tissue. Fourteen months after this operation he is in good

Mineralogical characterization of clays used in the structural ceramic industry in west of S. Paulo State, Brazil Caracterização mineralógica de argilas usadas na indústria de cerâmica estrutural no oeste do estado de S. Paulo, Brasil

Directory of Open Access Journals (Sweden)

S. R. Teixeira

2001-12-01

coletada nas várzeas dos rios Paraná e Paranapanema e a massa cerâmica usada pela indústria cerâmica do oeste do Estado de São Paulo. Difratometria de raios X, análise textural, limite de plasticidade e concentração de matéria orgânica foram usadas para caracterizar as amostras. A análise textural mostra que a fração argila variou de 38,2 a 66,3 %, a fração silte de 22,2 a 49,7 % e a fração areia de 3,1 a 34,1 %. A concentração de matéria orgânica varia de 5 a 7 %. Os resultados de difração de raios X mostram que todas as amostras possuem caulinita e muitas delas tem argilas do grupo das esmectitas, argilas interestratificadas e mica. Gibsita, óxidos de ferro e de titânio e quartzo são também identificados. Uma amostra usada para "pintar" potes é rica em goetita. Os resultados indicam que as massas cerâmicas tem alta concentração de argila na sua composição e devem ser misturadas com argila "magra". Caulinita é a fase majoritária em todas as amostras, dando uma boa plasticidade para a produção de tijolos e telhas por extrusão.

Trinità di Cava in 1111. Conflict resolution and definition of a border

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Vito Lorè

2006-06-01

Full Text Available At the beginning of the 12th century, in the course of a few years, the dukes of Puglia and the lords of Nocera put an end to a period of contrasts and redrew the map of powers in the area North of Salerno. The Trinità di Cava became the core of this new balance. Confirming its already evident inclination to act as a mediator in the conflicts between secular powers, the Trinità directed the agreements between the parts to its advantage through the payment of large amounts of money. Thus, it came into possession of an important castle and of the whole of the land of the involved parties inside a large area, delimited on in this occasion by neat boundaries. However, such area, lacking military defences in its Northern part, at the time was neither a territory subjected to a lordship nor a free space; it was, rather, a compensation area, avoiding contacts between the two rival powers. Only several decades later, when the Cava area was no more a borderland between different rules, the Trinità got hold of it and built up new fortifications, thus giving its presence in the area a lordship character.

Inferior vena cava filter thrombus: A possible cause of an unanticipated finding of {sup 99m} Tc-labeled red blood cell scintigraphy

Energy Technology Data Exchange (ETDEWEB)

Song, Hee Sung; Choi, Joon Hyouk; Kim, Young Suk [Jeju National University School of Medicine, Jeju (Korea, Republic of)

2016-06-15

{sup 99m}Tc-labeled red blood cell scintigraphy, a sensitive and specific diagnostic test, is useful for patients suspected of suffering from active gastrointestinal bleeding. This study follows a case of a patient who was suspected of gastrointestinal bleeding after an inferior vena cava filter was inserted due to a deep vein thrombosis of the femoral vein. To evaluate an exact focus of bleeding, {sup 99m}Tc-labeled red blood cell scintigraphy was executed. Herein, an unanticipated finding of {sup 99m}Tc-labeled red blood cell scintigraphy probably due to a thrombus on the inferior vena cava filter is reported.

Primary mediastinal melanoma presenting as superior vena cava syndrome: A case study

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Ann C Gaffey

2016-03-01

Full Text Available The rates of melanoma have increased over the past 30 years. Malignant melanoma most commonly occurs in the skin with secondary involvement of other organs. Here, we present an extremely rare case of malignant melanoma of the mediastinum with presentation of superior vena cava syndrome without clinical evidence of extrathoracic disease. The incidence of this clinical presentation is uncommon, resulting in only a handful of case reports in the literature. [Arch Clin Exp Surg 2016; 5(1.000: 56-58

EVIDÊNCIAS TEÓRICAS PARA COMPREENSÃO DA INOVAÇÃO ABERTA (OPEN INNOVATION NAS ORGANIZAÇÕES

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Marta Cleia Ferreira de Andrade

2015-06-01

Full Text Available Este estudo teórico tem como objetivo compreender como a estratégia de inovação aberta pode ser usada para acelerar e aprimorar o processo de inovação nas empresas. O presente trabalho pretende, ainda, aprofundar o conhecimento e oferecer uma visão analítica sobre o tema. Enquanto tradicionalmente, muitas empresas, isoladamente, lutam para produzir a inovação exigida pelos mercados, o modelo de inovação aberta mostra-se como uma alternativa para complementar os esforços inovadores das empresas. A partir de uma análise da literatura existente sobre inovação aberta, foi possível compreender o processo de criação de inovações nas empresas ao abrir-se para o ambiente externo, através do compartilhamento de ideias, conhecimentos, experiência e oportunidades. O modelo de inovação discutido permite que pequenas e grandes empresas possam melhorar sua competitividade, ao envolver-se nesse atual tipo de inovação.

Collateral circulations in inferior vena cava obstruction

International Nuclear Information System (INIS)

Lee, Jong Beum; Park, Jae Hyung; Han, Man Chung; Park, Soo Soung

1985-01-01

Obstruction of the inferior vena cava (IVC) is an uncommon condition, and the collateral pathway varies according to the level, extent, duration and the cause of obstruction. Membranous obstruction of IVC in its hepatic portion might be one of the principle cause among Korean, though not reported till now. Analytical study was performed in 26 cases of IVC obstruction with various cause. 1. The level of the obstruction showed relatively even distribution as follows, upper caval in 11 cases, middle caval in 6 cases and infrarenal in 9 cases. 2. The main cause of upper caval obstruction was membranous obstruction. 3. As a whole, the main collateral pathway was the central route (22 cases: 85%). 4. Characteristic collateral pathway unique to upper caval obstruction was transhepatic venous collateral, developed between the obstructed segment and unobstructed segment of IVC. 5. Scalloping of left cardiac border produced by pericardiophrenic venous collateral was characteristic simple chest x-ray finding in IVC obstruction

Symptomatic caval penetration by a Celect inferior vena cava filter

International Nuclear Information System (INIS)

Bogue, Conor O.; John, Philip R.; Connolly, Bairbre L.; Rea, David J.; Amaral, Joao G.

2009-01-01

We report a case of penetration of the inferior vena cava (IVC) by all four primary struts of a Celect caval filter in a 17-year-old girl with Klippel-Trenaunay syndrome. The girl presented with acute lower abdominal and right leg pain 17 days after filter insertion. An abdominal radiograph demonstrated that the filter had moved caudally and that the primary struts had splayed considerably since insertion. Contrast-enhanced CT confirmed that all four primary struts had penetrated the IVC wall. There was a small amount of retroperitoneal hemorrhage. The surrounding vessels and viscera were intact. The filter was subsequently retrieved without complication. (orig.)

The application of GxA8xB9nther Tulip retrievable inferior vena cava filter in interventional treatment for acute deep venous thrombosis of lower extremity

International Nuclear Information System (INIS)

Xiao Liang; Xu Ke; Shen Jing; Li Haiwei; Tong Jiajie; Zhang Xitong

2010-01-01

Objective: To discuss the therapeutic efficacy and manipulation skill of Gunther Tulip retrievable inferior vena cava filter in interventional treatment for acute deep venous thrombosis of lower extremity. Methods: From September 2007 to April 2008, a total of 36 patients with acute deep venous thrombosis of lower extremity were treated in our hospital. The time of the onset of disease ranged from 1 day to 12 days. The precipitation causes included prolonged lying in bed due to surgery or bone fracture (n = 18) and postpartum (n = 5), while no obvious precipitation causes could be found in 13 patients. Pulmonary embolism was coexisted in 12 cases. Clinically, the affected limb was swelling and painful, the skin was cyan-purple or pale in color with higher skin temperature. The circumferential length of the affected thigh was 3-10 cm longer than that of normal side. Patients with coexisted pulmonary embolism had the clinical presentation of dyspnea, chest pain, hemoptysis, etc. Gunther Tulip retrievable inferior vena cava filter was implanted via femoral venous access or via right internal jugular venous access, which was followed by intravenous transcatheter thrombolysis. Vascular ultrasonography and angiography were performed 45-75 days after the treatment to confirm that there was no fresh or free thrombus in the veins of lower limb or in the pulmonary arteries. When it was confirmed, Gunther Tulip retrievable inferior vena cava filter was taken out via right internal jugular venous access, which was followed by inferior venacavography. After the procedure anticoagulation and antibiotic medication were employed for 3-5 days. A follow-up for 4-10 months was made. Results: A total of 36 Gunther Tulip retrievable inferior vena cava filters were successfully implanted by one procedure, the average time cost for the filter delivery was 1.5 minutes (0.5-5 minutes). During the delivery procedure, the amplitude of elastic displacement of filter was less than 2 mm. One

Testing como Práctica para Evaluar la Eficiencia en Aplicaciones Web

Directory of Open Access Journals (Sweden)

Delvis Echeverría Perez

2014-10-01

Full Text Available La investigación está asociada al Testing como práctica para evaluar uno de los atributos de calidad que describe la Norma ISO/IEC 9126 como característica la “Eficiencia”, que es según esta norma: La capacidad del producto de software para proporcionar una ejecución o desempeño apropiado, en relación con la cantidad de recursos utilizados usados, bajo condiciones establecidas. Para evaluar esta característica se han identificado un conjunto de tipos de Test, teniendo en cuenta las sub-características de la misma ellas son: Rendimiento, Carga y Estrés, además se propone un procedimiento que guía la gestión y ejecución de los diferentes test. Para las No Conformidades (errores generados se ha elaborado una clasificación dependiendo de su tipo. Se propone el uso de herramientas automatizadas para la ejecución de los diferentes test, específicamente la herramienta JMETER, usada para analizar y medir el desempeño de una variedad de servicios, con énfasis en aplicaciones web. Se creó una Base de Casos de posibles soluciones que dan respuesta a errores HTTP. Todos estos elementos descritos anteriormente proveen de un marco para la evaluación final de la característica en cuestión en productos de software, proponiéndose un conjunto de métricas que arrojan resultados cuantitativos por cada sub-característica de la Norma o por tipos de test propuestos.

Changes in inferior vena cava blood flow velocity and diameter during breathing movements in the human fetus

NARCIS (Netherlands)

T. Huisman (T.); S. van den Eijnde (Stefan); P.A. Stewart (Patricia); J.W. Wladimiroff (Juriy)

1993-01-01

textabstractBreathing movements in the human fetus cause distinct changes in Doppler flow velocity measurements at arterial, venous and cardiac levels. In adults, breathing movements result in a momentary inspiratory collapse of the inferior vena cava vessel wall. The study objective was to quantify

Gestión pública para solucionar un problema ambiental: manejo de llantas de desecho en Ciudad Juárez

OpenAIRE

Gustavo Córdova Bojórquez; Ma. de Lourdes Romo Aguilar

2012-01-01

La reutilización de llantas usadas es un problema ambiental cuando ya no es posible seguirlas usando y se consideran basura, que se almacena en casas, se deposita en tiraderos clandestinos y se tira en la vía pública. Se convierten en refugio de plagas, roedores e insectos vectores de enfermedades, además constituyen un riesgo para el entorno y la salud humana, peligro que se incrementa ante la posibilidad de un incendio. El objetivo del presente trabajo es analizar la gestión del manejo de l...

Escalas de Envolvimento dos alunos na escola: Estudo da validade externa da escala de engagement usada no PISA e do "Student Engagement School Scale"

OpenAIRE

Veiga, Feliciano

2011-01-01

Procedeu-se ao estudo da validade externa da Escala de Engagement usada no PISA (unidimensional)e da Student Engament in School Scale (SES)com três factores (envolvimento cognitivo, afectivo e comportamental) This article presents the study of the external validity of Engagement Scale used in PISA (one dimension)and of the Engament in School Scale (SES)with three factores (cognitive, emotional and behavioral involvement)

Centro de Recursos de Aprendizagem: biblioteca escolar para o século XXI

Directory of Open Access Journals (Sweden)

Kelley Cristine Gonçalves Dias Gasque

2013-01-01

Full Text Available Relato de experiência do planejamento, construção e funcionamento do Centro de Recursos de Aprendizagem, CRA, do Colégio Marista de Brasília. Mais do que local de acesso à informação, constitui-se espaço de aprendizagem e de conhecimento, integrado ao processo pedagógico da escola, com a tarefa de formar cidadãos críticos e autônomos. Conclui-se que apesar do êxito da biblioteca, para que seja efetivamente usada como Centro de Recursos de Aprendizagem, a escola deve-se adotar currículo mais flexível e métodos de resolução de problemas.

O efeito da sugestão de falsa informação para eventos emocionais: quão suscetíveis são nossas memórias?

OpenAIRE

Neufeld,Carmem Beatriz; Brust,Priscila Goergen; Stein,Lilian Milnitsky

2008-01-01

O presente trabalho visa fornecer evidências científicas da susceptibilidade das memórias a distorção através do estudo das falsas memórias (lembranças de eventos que, na realidade, não ocorreram) para situações emocionalmente carregadas. Foi usada a versão brasileira dos instrumentos e procedimentos de Cahill, Prins, Weber, e McGaugh e adaptada por Neufeld, Brust e Stein para a investigação do efeito da emoção na memória e nas falsas memórias. O experimento investigou o efeito de sugestão de...

Reproducibilidad de un instrumento para evaluar factores de riesgo de cáncer de piel

Directory of Open Access Journals (Sweden)

John Alexander Nova-Villanueva

2017-09-01

Full Text Available Objetivo: evaluar la reproducibilidad de un instrumento para la medición de factores de riesgo de cáncer de piel. Métodos: tomando como base algunas variables encontradas en la literatura para medir factores de riesgo de cáncer de piel, se hicieron grupos focales con pacientes y con expertos, para obtener las preguntas de un instrumento de recolección de datos. Posteriormente, se evaluó la reproducibilidad pruebareprueba en 85 casos (cáncer de piel y 85 controles de los ítems seleccionados. Para el análisis se utilizaron los estadísticos kappa, kappa ponderado y coeficiente de correlación de Lin. Resultados: las variables con mayor confiabilidad fueron municipio de residencia (0,86-0.98 y la ocupación al aire libre (0,78-0,83. La variable con menor confiabilidad fue el uso de elementos de protección solar (0,53-0,8. Conclusiones: las variables evaluadas tienen unos niveles de confiabilidad buenos, lo cual es una de las condiciones que se deben tener en cuenta para que sean usadas en la identificación de los factores de riesgo para desarrollar cáncer de piel en nuestra población, de una manera más válida.

Umbilical vein draining into the inferior vena cava via the internal iliac vein, bypassing the liver

International Nuclear Information System (INIS)

Currarino, G.; Stannard, M.W.; Texas Univ., Dallas, TX; Kolni, H.

1991-01-01

This is the third report of an anomalous umbilical vein draining ectopically in a left pelvic vein, probably the left internal iliac, and through the inferior vena cava into the right atrium. The anomaly was encountered in a newborn infant with nonimmune hydrops fetalis, hypertrophic cardiomyopathy, multiorgan failure and possibly Noonan Syndrome. (orig.)

Umbilical vein draining into the inferior vena cava via the internal iliac vein, bypassing the liver

Energy Technology Data Exchange (ETDEWEB)

Currarino, G.; Stannard, M.W. (Children' s Medical Center, Dallas, TX (United States). Dept. of Radiology Texas Univ., Dallas, TX (United States). Southwestern Medical Center); Kolni, H. (Methodist Hospital, Dallas, TX (United States). Dept. of Pediatrics)

1991-05-01

This is the third report of an anomalous umbilical vein draining ectopically in a left pelvic vein, probably the left internal iliac, and through the inferior vena cava into the right atrium. The anomaly was encountered in a newborn infant with nonimmune hydrops fetalis, hypertrophic cardiomyopathy, multiorgan failure and possibly Noonan Syndrome. (orig.).

Scimitar syndrome of atypical, rare drainage of venous vessel to the superior vena cava. A case report

International Nuclear Information System (INIS)

Sybilski, Adam J.; Michalczuk, Małgorzata; Chudoba, Anna; Tolak-Omernik, Katarzyna; Bulski, Tomasz; Walecki, Jerzy

2013-01-01

Scimitar syndrome is a rare and complex congenital anomaly characterized by partial or complete anomalous pulmonary venous return from the right or left lung into the inferior vena cava, through drainage into the hepatic vein, right atrium or left atrium. The syndrome is commonly associated with hypoplasia of the right lung and right pulmonary artery. We present an 11-year-old female with atypical and rare type of scimitar syndrome. The girl has had cough for 2 months before admission, without fever or abnormalities on medical examination. X-ray films revealed inflammatory and atelectatic changes with mediastinal shift to the right. CT and CT angiography – hypoplasia of the right lung with no visible interlobar fissures. No areas of consolidation in the pulmonary parenchyma. Mediastinum shifted to the right. Single wide venous vessels draining the upper part of the right lung entering the superior vena cava. In our patient, clinical symptoms are mild, but a thorough physical examination could have helped diagnose the syndrome earlier

Comparação das técnicas transarterial e de estimulação de múltiplos nervos para bloqueio do plexo braquial por via axilar usando lidocaína com epinefrina

OpenAIRE

Imbelloni, Luiz Eduardo; Beato, Lúcia; Cordeiro, José Antônio

2005-01-01

JUSTIFICATIVA E OBJETIVOS: A técnica transarterial com grandes doses de anestésico local resulta em alta efetividade para o bloqueio axilar do plexo braquial. A técnica utilizando múltiplos estímulos exige mais tempo e maior experiência. Este estudo prospectivo compara a latência e o índice de sucesso do bloqueio do plexo braquial usando duas técnicas de localização: transarterial ou múltipla estimulação dos nervos. MÉTODO: A lidocaína com epinefrina, 800 mg, foi usada inicialmente para o blo...

Avaliação nutricional do farelo de arroz desengordurado em suínos nas fases de crescimento e terminação utilizando o método de substituição e análise de regressão

OpenAIRE

Marco Antônio Kunrath

2010-01-01

A avaliação de alimentos alternativos como o farelo de arroz desengordurado (FAD) se faz necessária para um adequado balanço nutricional das dietas de suínos. As metodologias usadas para esse fim podem constituir-se num fator de variação, diminuindo a precisão dos resultados obtidos. Este trabalho teve os objetivos de avaliar o valor nutricional do FAD na dieta de suínos com diferentes níveis de inclusão e também fazer uma comparação de diferentes metodologias usadas para esse fim. Foram real...

PESQUISA DE MERCADO PARA ABERTURA DE UMA LOJA DE BOLOS CASEIROS “DELICIAS DA DONA GÊ” NO MUNICÍPIO DE SÃO JOSÉ DOS CAMPOS (SP

Directory of Open Access Journals (Sweden)

Alberto Bruno Silva Lacerda

2017-01-01

Full Text Available O trabalho tem como objetivo realizar uma pesquisa de mercado para uma empresa atuante no comércio alimentício com fabricação e comercialização de bolos caseiros, visando ser reconhecida no segmento alimentício e atender as necessidades dos clientes. A empresa irá comercializar produtos de qualidade que seja acessível para todos os públicos. A partir dessa ideia, a empresa tem como diferencial um espaço Gourmet que proporcionará aos clientes um ambiente diferenciado onde poderão degustar a variedade de produtos. Com o método da pesquisa quantitativa e qualitativa, usada para mapear a região de estudo, percebeu-se que as pessoas se interessariam pelos produtos e pelo ambiente diferenciado apresentado.

Venous Thromboembolism After Removal of Retrievable Inferior Vena Cava Filters

International Nuclear Information System (INIS)

Yamagami, Takuji; Tanaka, Osamu; Yoshimatsu, Rika; Miura, Hiroshi; Nishimura, Tsunehiko

2010-01-01

The purpose of this study was to examine the incidence of new or recurrent venous thromboembolism (VTE) after retrieval of inferior vena cava (IVC) filters and risk factors associated with such recurrence. Between March 2001 and September 2008, at our institution, implanted retrievable vena cava filters were retrieved in 76 patients. The incidence of new or recurrent VTE after retrieval was reviewed and numerous variables were analyzed to assess risk factors for redevelopment of VTE after filter retrieval. In 5 (6.6%) of the 76 patients, redevelopment or worsening of VTE was seen after retrieval of the filter. Three patients (4.0%) had recurrent deep venous thrombosis (DVT) in the lower extremities and 2 (2.6%) had development of pulmonary embolism, resulting in death. Although there was no significant difference in the incidence of new or recurrent VTE related to any risk factor investigated, a tendency for development of VTE after filter retrieval was higher in patients in whom DVT in the lower extremities had been so severe during filter implantation that interventional radiological therapies in addition to traditional anticoagulation therapies were required (40% in patients with recurrent VTE vs. 23% in those without VTE; p = 0.5866 according to Fisher's exact probability test) and in patients in whom DVT remained at the time of filter retrieval (60% in patients with recurrent VTE vs. 37% in those without VTE; p = 0.3637). In conclusion, new or recurrent VTE was rare after retrieval of IVC filters but was most likely to occur in patients who had severe DVT during filter implantation and/or in patients with a DVT that remained at the time of filter retrieval. We must point out that the fatality rate from PE after filter removal was high (2.6%).

Permanent Pacemaker-Induced Superior Vena Cava Syndrome: Successful Treatment by Endovascular Stent

International Nuclear Information System (INIS)

Lanciego, Carlos; Rodriguez, Mario; Rodriguez, Adela; Carbonell, Miguel A.; Garcia, Lorenzo Garcia

2003-01-01

The use of metallic stents in the management of benign and malignant superior vena cava syndrome (SVCS) is well documented. Symptomatic stenosis or occlusion of the SVC is a rare complication of a transvenous permanent pacemaker implant. Suggested treatments have included anticoagulation therapy, thrombolysis, balloon angioplasty and surgery. More recently, endovascular stenting has evolved as an attractive alternative but the data available in the literature are limited. We describe a case in which venous stenting with a Wallstent endoprosthesis was used successfully. The patient remains symptom free and with normal pacemaker function 36 months later

Nursing care of the complications caused by vena cava filter placement and thrombolytic therapy

International Nuclear Information System (INIS)

Ma Congfeng; Tan Meifang; Fu Bing; Luo Chunhua; Jiang Fengjiao

2011-01-01

Objective: To discuss the nursing care and observation measures for the complications occurred after vena cava filter placement and thrombolytic therapy. Methods: During the period of July 2007-March 2010, vena cava filter placement and thrombolytic therapy were employed in 70 patients. The observation for the main procedure-related complications was made. The main complications included bleeding tendency, pulmonary embolism, filter migration or loss, thrombus formation within filter, IVC perforation due to filter, venous insufficiency and skin blisters of the affected lower extremity. Results: The total effective rate of thrombolytic treatment in 70 patients was 95.7%. As reasonable and effective nursing care measures were implemented, no major complications, such as pulmonary embolism, filter migration or loss,thrombus formation within filter, IVC perforation due to filter, infection, etc. occurred. The other complications developed in some patients,which included hematuria (n=4), bleeding at puncturing site (n=3), bleeding at abdominal incision (n=3), subcutaneous ecchymosis (n=3) and skin vesicles of diseased limb (n=3), all of which were cured after proper management. Conclusion: Postoperative nursing is a kind of prospective nursing care, the primary purpose of which is to prevent the occurrence of the potential complications after surgery. Therefore, solid fundamental knowledge, careful observation ability and strong consciousness of responsibility are most important.(authors)

Retrievable Vena Cava Filters in Major Trauma Patients: Prevalence of Thrombus Within the Filter

International Nuclear Information System (INIS)

Mahrer, Arie; Zippel, Douglas; Garniek, Alexander; Golan, Gil; Bensaid, Paul; Simon, Daniel; Rimon, Uri

2008-01-01

The purpose of this study was to report the prevalence of thrombus within a retrievable vena cava filter inserted prophylactically in major trauma patients referred for filter extraction. Between November 2002 and August 2005, 80 retrievable inferior vena cava filters (68 Optease and 12 Gunther-Tulip) were inserted into critically injured trauma patients (mean injury severity score 33.5). The filters were inserted within 1 to 6 (mean 2) days of injury. Thirty-seven patients were referred for filter removal (32 with Optease and 5 with Gunther-Tulip). The indwelling time was 7 to 22 (mean 13) days. All patients underwent inferior vena cavography prior to filter removal. There were no insertion-related complications and all filters were successfully deployed. Forty-three (54%) of the 80 patients were not referred for filter removal, as these patients continued to have contraindications to anticoagulation. Thirty-seven patients (46%) were referred for filter removal. In eight of them (22%) a large thrombus was seen within the filters and they were left in place, all with the Optease device. The other 29 filters (36%) were removed uneventfully.We conclude that the relatively high prevalence of intrafilter thrombi with the Optease filter may be explained by either spontaneous thrombus formation or captured emboli.

Diseño, construcción y puesta a punto de una instalación para la determinación de la cavitación en bombas centrífugas

OpenAIRE

Barcina García, Pedro

2016-01-01

El presente proyecto se basa en el diseño, construcción y puesta a punto de una instalación para el estudio de la cavitación en bombas centrífugas. Es una profundización, desde el punto de vista experimental, en los conocimientos aprendidos sobre el tema en las asignaturas de Ingeniería Fluidomecánica, Mecánica de Fluidos y Máquinas Hidráulicas. Además del experimento, se ha preparado la instalación y se ha redactado un guion de prácticas para que pueda ser usada con fines didácticos por los ...

Vessel Wall Reaction after Vena Cava Filter Placement

International Nuclear Information System (INIS)

Hoekstra, Arend; Elstrodt, Jan M.; Nikkels, Peter G.J.; Tiebosch, Anton T.M.G.

2002-01-01

Purpose: To evaluate the interaction between the Cordis Keeper vena caval filter and vessel wall in aporcine model.Methods: Implantation of the filter was performed in five pigs. Radiologic data concerning inferior vena cava(IVC) diameter and filter patency, filter leg span, and stability were collected. At 2 or 6 months post-implantation, histopathologic analysis of the IVC wall was performed.Results: All filters remained patent with no evidence of migration. However, at 6 months follow-up, two legs of one filter penetrated the vessel wall and were adherent to the liver. These preliminary results suggest that with the observed gradual increase in the filter span, the risk of caval wall penetration increases with time, especially in a relatively small IVC(average diameter 16 mm).Conclusion: The Cordis Keeper filter was well tolerated, but seems to be prone to caval wall penetration in the long term

Funções de pedotransferência para predição da umidade retida a potenciais específicos em solos do estado de Pernambuco

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L. B. Oliveira

2002-06-01

Full Text Available Funções de pedotransferência são equações usadas para estimar características edáficas de difícil determinação a partir de outras mais facilmente obtidas. Apesar do bom número de equações disponíveis para estimativa da umidade retida a potenciais matriciais específicos, elas não devem ser usadas indiscriminadamente, pois, em sua maioria, foram desenvolvidas com solos de clima temperado e a partir de dados gerados por métodos diversos dos em uso nos laboratórios brasileiros. O presente trabalho teve por objetivos: (a elaborar funções de pedotransferência para estimar o conteúdo de água nos potenciais de -33 e -1.500 kPa e a água disponível, a partir de dados granulométricos e de densidade do solo, para solos do estado de Pernambuco e (b comparar a eficiência de predição das equações propostas em relação a equações similares, disponíveis na literatura. No desenvolvimento das equações, foi utilizada uma base de dados composta por 98 perfis de solos e 467 horizontes. Os perfis foram agrupados, de acordo com Sistema Brasileiro de Classificação de Solos, em 27 classes de terceiro nível categórico (grande grupo. As equações desenvolvidas apresentaram bons coeficientes de determinação e baixo erro de predição. A sistematização dos dados por atividade da fração argila ou grau aproximado de desenvolvimento ou classe textural não produziu melhorias na capacidade preditiva das pedofunções. As equações propostas em outros trabalhos apresentaram elevado erro de predição, o que restringe a sua utilização para solos do estado de Pernambuco.

Cold-Adapted Viral Attenuation (CAVA): Highly Temperature Sensitive Polioviruses as Novel Vaccine Strains for a Next Generation Inactivated Poliovirus Vaccine.

Science.gov (United States)

Sanders, Barbara P; de Los Rios Oakes, Isabel; van Hoek, Vladimir; Bockstal, Viki; Kamphuis, Tobias; Uil, Taco G; Song, Yutong; Cooper, Gillian; Crawt, Laura E; Martín, Javier; Zahn, Roland; Lewis, John; Wimmer, Eckard; Custers, Jerome H H V; Schuitemaker, Hanneke; Cello, Jeronimo; Edo-Matas, Diana

2016-03-01

The poliovirus vaccine field is moving towards novel vaccination strategies. Withdrawal of the Oral Poliovirus Vaccine and implementation of the conventional Inactivated Poliovirus Vaccine (cIPV) is imminent. Moreover, replacement of the virulent poliovirus strains currently used for cIPV with attenuated strains is preferred. We generated Cold-Adapted Viral Attenuation (CAVA) poliovirus strains by serial passage at low temperature and subsequent genetic engineering, which contain the capsid sequences of cIPV strains combined with a set of mutations identified during cold-adaptation. These viruses displayed a highly temperature sensitive phenotype with no signs of productive infection at 37°C as visualized by electron microscopy. Furthermore, decreases in infectious titers, viral RNA, and protein levels were measured during infection at 37°C, suggesting a block in the viral replication cycle at RNA replication, protein translation, or earlier. However, at 30°C, they could be propagated to high titers (9.4-9.9 Log10TCID50/ml) on the PER.C6 cell culture platform. We identified 14 mutations in the IRES and non-structural regions, which in combination induced the temperature sensitive phenotype, also when transferred to the genomes of other wild-type and attenuated polioviruses. The temperature sensitivity translated to complete absence of neurovirulence in CD155 transgenic mice. Attenuation was also confirmed after extended in vitro passage at small scale using conditions (MOI, cell density, temperature) anticipated for vaccine production. The inability of CAVA strains to replicate at 37°C makes reversion to a neurovirulent phenotype in vivo highly unlikely, therefore, these strains can be considered safe for the manufacture of IPV. The CAVA strains were immunogenic in the Wistar rat potency model for cIPV, inducing high neutralizing antibody titers in a dose-dependent manner in response to D-antigen doses used for cIPV. In combination with the highly productive

Diseño y construcción de un banco de pruebas térmicos para discos de freno

OpenAIRE

Orellana Villavicencio, Alex Eduardo; Songor Songor, José Alberto

2007-01-01

La seguridad de las personas sin duda alguna debe ser el objetivo principal que debe primar en cualquier diseño, siendo los vehículos las máquinas más usadas por las personas, los sistemas que conforman los vehículos deben cumplir y ser diseñados para brindar la mayor seguridad posible. Por tanto el presente trabajo de investigación ha desarrollado el estudio y el análisis del comportamiento de un importantísimo sistema del vehículo como lo es el sistema de frenos centrando su estudio prin...

Diagnostic importance of the recognition of the inferior Vena cava abnormalities on CT-examinations

Energy Technology Data Exchange (ETDEWEB)

Gouliamos, A.; Striggaris, K.; Haliasos, N.; Vlahos, N.; Pontifex, G.

1981-09-01

Two unusual variations of the Vena cava inferior, as shown by CT examinations, are reported and characteristic X-rays, as well as CT scans, are presented. The first case shows an IVC course to the left of the aorta and the second case absence of the intrahepatic portion of the IVC with azygos continuation. Difficulties in the differential diagnosis are analyzed and discussed, both demonstrated by plain X-rays and CT scans.

Technical Error During Deployment Leads to Vena Cava Filter Migration and Massive Pulmonary Embolism

International Nuclear Information System (INIS)

Fotiadis, Nikolas I.; Sabharwal, Tarun; Dourado, Renato; Fikrat, Shabbo; Adam, Andreas

2008-01-01

The Guenther Tulip vena cava filter is a safe, effective, well-established device for pulmonary embolism prophylaxis. We report a patient in whom there was migration of the filter to the right atrium, 2 weeks after insertion, caused by a technical error during deployment. An attempt to retrieve the filter percutaneously failed, necessitating removal at open-heart surgery. The potential causes of migration are described and the lessons learned from this unusual case are outlined.

Estrutura, ultraestrutura e morfometria da veia cava de paca (Cuniculus paca Linnaeus, 1766 criada em cativeiro

Directory of Open Access Journals (Sweden)

Sérgio Pinter Garcia Filho

2013-05-01

Full Text Available A paca (Cuniculus paca é o segundo maior roedor da fauna brasileira. Apresenta carne de excelente qualidade, o que incentiva a criação comercial. Além disso, este animal pode tornar-se uma opção válida em experimentação embora poucas sejam as informações detalhadas sobre sua morfologia. Assim, objetivou-se descrever a morfologia, morfometria e ultraestrutura de segmentos das porções cranial e caudal da veia cava de quatro pacas (Cuniculus paca adultas excedentes do plantel do Setor de Animais Silvestres do Departamento de Zootecnia da FCAV-Unesp. Os segmentos venosos foram analisados à microscopia de luz e à microscopia eletrônica de varredura. Foram mensuradas as espessuras do complexo formado pelas túnicas íntima e média, além da túnica adventícia e analisou-se os resultados pela estatística descritiva, teste "T" pareado (p<0,05. Em relação à espessura das túnicas estudadas, comprovou-se que os valores da espessura das túnicas íntima, média e adventícia, para todos os animais, foram significativamente maiores no segmento cranial. As camadas das paredes dos vasos apresentaram variações entre si quanto à estrutura e espessura, supostamente devido a uma adaptação à exigência funcional.

Modelos globales del campo magnético terrestre para los últimos 3000 años: discrepancias según las bases de datos usadas

OpenAIRE

Campuzano, S. A.; Gómez-Paccard, Miriam; Pavón-Carrasco, Fco. Javier; Osete, María Luisa

2016-01-01

La modelización global del campo magnético terrestre no es sólo fundamental para comprender cómo funciona y varía en el tiempo, sino también para constreñir los modelos de geodinamo y corregir las tasas de producción de isótopos cosmogénicos. Obtener modelos suficientemente realistas depende en gran medida de las bases de datos empleadas. Los datos arqueomagnéticos y volcánicos proporcionan un registro casi instantáneo del campo, debido al proceso de adquisición de la remanencia magnética (te...

Immediate endovascular treatment of an aortoiliac aneurysm ruptured into the inferior vena cava.

Science.gov (United States)

Kopp, Reinhard; Weidenhagen, Rolf; Hoffmann, Ralf; Waggershauser, Tobias; Meimarakis, Georgios; Andrassy, Joachim; Clevert, Dirk; Czerner, Stephan; Jauch, Karl-Walter

2006-07-01

An aortocaval fistula is a severe complication of an aortoiliac aneurysm, usually associated with high perioperative morbidity and mortality during open operative repair. We describe the successful endovascular treatment of a symptomatic infrarenal aortic aneurysm ruptured into the inferior vena cava with secondary interventional coiling of a persistent type II endoleak because of retrograde perfusion of the inferior mesenteric artery. Endovascular exclusion of ruptured abdominal aneurysms seems to be a valuable treatment option for selected patients even with complicated vascular conditions like an aortocaval fistula.

Biossegurança e a enfermagem nos cuidados clínicos: contribuições para a saúde do trabalhador

OpenAIRE

Gallas, Samanta Rauber; Fontana, Rosane Teresinha

2010-01-01

Estudo qualitativo que teve como objetivo investigar concepções e práticas de técnicos em enfermagem acerca da biossegurança e sua interface com os riscos biológicos, desenvolvido com vinte trabalhadores de uma unidade de cuidado clínico, de um hospital do interior do Rio Grande do Sul. Os dados foram coletados mediante entrevistas e observação sistemática. A análise temática foi a metodologia usada para o tratamento dos dados. A negligência dos trabalhadores quanto ao uso de Equipamentos de ...

AVALIAÇÃO DOS IMPACTOS AMBIENTAIS E SOCIAIS COMO SUBSÍDIO PARA LICENCIAMENTO AMBIENTAL DO PROJETO DE ASSENTAMENTO DE REFORMA AGRÁRIA MARIA BONITA I, POÇO REDONDO/SE

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Thiago Almeida Leite

2011-12-01

Full Text Available O presente trabalho identificou e avaliou os impactos ambientais e sociais negativos do projeto de assentamentode reforma agrária Maria Bonita I, localizado no município de Poço Redondo, Sergipe, visando a subsidiar oprocesso de licenciamento ambiental. Para tal, utilizaram-se duas matrizes: a primeira, adaptada de Leopold,foi usada para classificar qualitativamente os impactos de acordo com seu tipo, natureza, periodicidade, efeito,reversibilidade e alcance; e a segunda foi elaborada por esta pesquisa para listar as atividades impactantes, osimpactos, suas respectivas medidas mitigadoras e os responsáveis em mitigá-las. Em seguida, as atividadesimpactantes foram descritas. Conclui-se que o licenciamento é de fundamental importância para minimizar osimpactos ambientais e sociais e melhorar a qualidade de vida da população, uma vez que as condicionantesambientais devem ser atendidas durante este processo.

The Need for Anticoagulation Following Inferior Vena Cava Filter Placement: Systematic Review

International Nuclear Information System (INIS)

Ray, Charles E.; Prochazka, Allan

2008-01-01

Purpose. To perform a systemic review to determine the effect of anticoagulation on the rates of venous thromboembolism (pulmonary embolus, deep venous thrombosis, inferior vena cava (IVC) filter thrombosis) following placement of an IVC filter. Methods. A comprehensive computerized literature search was performed to identify relevant articles. Data were abstracted by two reviewers. Studies were included if it could be determined whether or not subjects received anticoagulation following filter placement, and if follow-up data were presented. A meta-analysis of patients from all included studies was performed. A total of 14 articles were included in the final analysis, but the data from only nine articles could be used in the meta-analysis; five studies were excluded because they did not present raw data which could be analyzed in the meta-analysis. A total of 1,369 subjects were included in the final meta-analysis. Results. The summary odds ratio for the effect of anticoagulation on venous thromboembolism rates following filter deployment was 0.639 (95% CI 0.351 to 1.159, p = 0.141). There was significant heterogeneity in the results from different studies [Q statistic of 15.95 (p = 0.043)]. Following the meta-analysis, there was a trend toward decreased venous thromboembolism rates in patients with post-filter anticoagulation (12.3% vs. 15.8%), but the result failed to reach statistical significance. Conclusion. Inferior vena cava filters can be placed in patients who cannot receive concomitant anticoagulation without placing them at significantly higher risk of development of venous thromboembolism

Motivaciones de la Gerencia para Manipular la Cifra de Beneficio Contable

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Edison Cornejo Saavedra

2016-06-01

Full Text Available Las prácticas de earnings management son usadas para alterar la cifra de beneficios reportada en los estados financieros, ya sea para inducir a error a las partes interesadas en el desempeño de la firma, o para influir en los resultados contractuales que dependen de las cifras contables. Este artículo analiza las principales motivaciones de la gerencia de una empresa para efectuar prácticas de earnings management. Para ello, se realiza una revisión de los principales artículos de la literatura contable. Se identifican cuatro grupos de motivaciones: (1 contractuales; (2 políticas y regulatorias; (3 de valoración; y (4 fiscales o tributarias. También se analizan las razones para cometer una forma extrema de earnings management: el fraude contable. Reconocer a tiempo la existencia de alguna de estas motivaciones al interior de una organización, podría ser útil para entender y anticipar las decisiones de la gerencia y el comportamiento de una firma, frente a determinados escenarios políticos, económicos y financieros. Earnings management techniques are used to alter financial statements, either to mislead stakeholders on the performance of a firm or to influence contractual outcomes that depend on the accounting figures. This article analyzes the main motivations that lead company executives to apply earnings management practices. A review of accounting literature was performed and 4 groups of motivations were found: (1 contract; (2 policies and regulations; (3 valuation; and (4 taxes. The reasons for committing an extreme form of earnings management, accounting fraud, are also discussed. Identifying of some of these motivations within an organization may be useful to understand and anticipate management decisions and firm behavior in the face of certain political, economic and financial scenarios.

Comparação das técnicas transarterial e de estimulação de múltiplos nervos para bloqueio do plexo braquial por via axilar usando lidocaína com epinefrina Comparación de las técnicas transarterial y de estimulación de múltiples nervios para bloqueo del plexo braquial por vía axilar usando lidocaína con epinefrina Comparison of transarterial and multiple nerve stimulation techniques for axillary block using lidocaine with epinephrine

OpenAIRE

Luiz Eduardo Imbelloni; Lúcia Beato; José Antônio Cordeiro

2005-01-01

JUSTIFICATIVA E OBJETIVOS: A técnica transarterial com grandes doses de anestésico local resulta em alta efetividade para o bloqueio axilar do plexo braquial. A técnica utilizando múltiplos estímulos exige mais tempo e maior experiência. Este estudo prospectivo compara a latência e o índice de sucesso do bloqueio do plexo braquial usando duas técnicas de localização: transarterial ou múltipla estimulação dos nervos. MÉTODO: A lidocaína com epinefrina, 800 mg, foi usada inicialmente para o blo...

Modelo estadístico en series temporales para la predicción de la temperatura de gas de tragante del horno alto

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Martínez, A.

1995-08-01

Full Text Available This work, through techniques seldom used in the ironmaking field, establishes a criterion to define the behaviour along the time of significant operating variables of the blast furnace. A time series autoregressive model has been developed, achieving with it an adequate forecasting level. The methodology used has been the Yule-Walker equations to establish the model, the Akaike test to choose the best one and the autocorrelation function analysis to check it.

En el presente trabajo, a través de técnicas poco usadas en el campo siderúrgico, se establece un criterio para definir el comportamiento en el tiempo de variables de operación significativas del homo alto. Para ello, se ha desarrollado un modelo autorregresivo en series temporales que permite una adecuada predicción. La metodología ha consistido en utilizar las ecuaciones de Yule-Walker y el test de Akaike para establecer y elegir el mejor modelo, y el análisis de la función de autocorrelación para comprobarlo.

Marker-Negative Pheochromocytoma Associated with Inferior Vena Cava Thrombosis

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S. Poudyal

2017-01-01

Full Text Available Pheochromocytoma associated with inferior vena cava (IVC thrombosis is very rare. A 27-year-old female presented with right flank pain and hypertensive urgency. Contrast-enhanced CT abdomen and gadolinium-contrast MRI abdomen revealed right adrenal mass suspicious of malignancy with invasion and compression to the right IVC wall along with IVC thrombus extending from the level of renal veins to the level of confluence with hepatic veins. Her routine laboratory investigations including 24-hour urine fractionated metanephrines, vanillylmandelic acid, and cortisol were normal. Right adrenalectomy with IVC thrombectomy was done. Perioperative period was uneventful. Histopathology of the mass turned out to be pheochromocytoma with thrombus revealing fibroadipose tissue with fibrin. Pheochromocytoma may present with IVC thrombus as well as normal serum and urinary markers. Thus, clinical suspicion is imperative in perioperative management of adrenal mass.

Ecuaciones para la evaluación de la composición corporal en niños y adolescentes

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Cristian Curilem-Gatica

2016-01-01

Full Text Available Resumen: El uso del índice de masa corporal (IMC es el más masivo a nivel mundial y a pesar de existir recomendaciones para su interpretación en relación al sexo, edad y raza, normalmente se estandariza su entendimiento, aumentando el error en el resultado y en la clasificación del estado nutricional. El uso de la composición corporal entrega información de mayor relevancia que el IMC, siendo la masa grasa y la masa muscular las principales. Esta comunicación presenta una revisión de las ecuaciones existentes y propone aquellas más simples y con menor error de estimación para ser usadas como una herramienta que reemplace o complemente al IMC, favoreciendo una mejor comprensión e interpretación del estado nutricional y nivel de actividad física.

The clinical implications of variants of vena cava inferior and aorta on retroperitoneal surgery

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S. V. Mukhtarulina

2014-12-01

Full Text Available Objective: to study variants of retroperitoneal vascular structure and its clinical implications on retroperitoneal surgery in patients with cervical cancer IA–IIB stage.Materials and methods. 101 patients who underwent paraaortic and bilateral pelvic lymphadenectomy were included in this study. 10 patients of the first group with anomalies of inferior vena cava, renal arteries and veins, common iliac vein and ovarian vessels were compared with 91 patients of the second group without anomalies.Results. Variants of major retroperitoneal vascular structure were present in 10 (9.9 % patients. Supernumerary renal arteries and veins observed in 5 (4.9 % patients; retroaortic left renal vein type I and II – in 3 (3.0 % patients. Double vena cava inferior detected in 1 (1.0 % patient. Patients with variants of retroperitoneal vascular structures hadn’t vessel injury. There was no difference in intraoperative hemorrhage, transfusion red blood cell, rate of intraoperative hemoglobin and removed paraaortic lymph nodes between the groups. Risk factors for intraoperative bleeding in patients with cervical cancer, depending on the presence or absence of anomalies of retroperitoneal vessels had no significant difference.Conclusion. Despite the fact that the variants of retroperitoneal vascular structures are rare (9.9 %, the success of retroperitoneal surgery is associated with the knowledge of vascular variations which decrease serious, life-threatening complications.

Uso das diretrizes para tratamento da úlcera por pressão por enfermeiros de um hospital geral

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Elaine Maria Leite Rangel

2009-03-01

Full Text Available Este estudo objetivou identificar a freqüência do uso das diretrizes para o tratamento da úlcera por pressão(UP por enfermeiros de um hospital geral no interior do estado de São Paulo. É transversal de caráterdescritivo com análise quantitativa de dados. Amostra de 25 enfermeiros. Para a coleta de dados utilizou-se uminstrumento, construído a partir das diretrizes para o tratamento da UP. As questões foram relacionadas aostipos de intervenções usadas pelos enfermeiros para o tratamento da UP em estágio I, II, com necrose e comtecido de granulação. Para UP em estágio I, 24 (96% enfermeiros sempre realizavam a mudança de decúbito.Nas úlceras em estágio II a utilização de óleos vegetais na ferida era realizada sempre por 10 (40%enfermeiros e o curativo de hidrocolóide nunca era utilizado por 12 (57,1% enfermeiros. Em UP com necrose alimpeza com povidine era realizada por 4 (17,4% enfermeiros às vezes. Para o desbridamento, 16 (64% àsvezes utilizavam papaína e 15 (71,4% às vezes utilizavam colagenase. Em úlceras com tecido de granulaçãosempre era utilizado o soro fisiológico por 25 (100% enfermeiros. Houve variação nas práticas para otratamento da UP e falta de adesão às diretrizes.

ADOLESCENTES EM CONFLITO COM A LEI EM MOÇAMBIQUE: REFLEXÕES SOBRE MEDIDAS SOCIOEDUCATIVAS E LIMITES PARA SUA APLICAÇÃO PRÁTICA.

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Tomás Xavier Francisco

2015-03-01

Full Text Available Este artigo tem por fim analisar, por um lado, a problemática dos adolescentes em conflito com a lei em Moçambique, e por outro lado, fazer reflexões sobre as medidas socioeducativas e limites para a sua aplicação prática. O trabalho contempla uma introdução, desenvolvimento onde arrola-se considerações sobre o histórico da legislação sobre adolescentes ou menores no país, reflexões sobre medidas socioeducativas e seus limites para sua aplicação prática, e por fim, contempla considerações finais e referências bibliográficas. A metodologia usada foi estudo exploratório, recorrendo-se a pesquisa bibliográfica e análise documental.

Validação de um Sistema Robotizado Recém Desenvolvido para a Soldagem pelo Processo Friction Stir Welding por meio da União e Caracterização de Juntas da Liga de Alumínio 5052 H34

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Bruno Silva Cota

2017-12-01

Full Text Available Resumo Este projeto trata da validação de um sistema recém desenvolvido para a soldagem pelo processo friction stir welding, que foi adaptado a um robô antropomórfico com capacidade de 500 kg e seis graus de liberdade. Para garantir que o sistema projetado é capaz de soldar materiais pelo processo FSW, ou seja, garantir que possui rigidez, resistência e torque suficientes para realizar a operação de soldagem, faz-se necessário realizar a validação do mesmo. Para tanto, foi necessário soldar um material conhecido, com parâmetros já estabelecidos, e utilizar uma ferramenta apropriadamente dimensionada. Dessa forma, escolheu-se a liga 5052 H43 de 3 mm de espessura, usada na produção de navios, embarcações e estruturas automotivas. Para a soldagem das juntas finais foi usada uma ferramenta fabricada em AISI H13, com pino cônico liso e diâmetro do ombro de 18 mm. A velocidade rotacional da ferramenta foi mantida constante em 378 rpm, e a velocidade de avanço em 7,5 mm/min, sendo a inclinação da ferramenta de 2°. Verificou-se após os ensaios que o sistema de soldagem projetado se mostrou eficaz em aplicações de soldagem FSW, apresentando torque e resistência mecânica suficientes para a união de materiais com baixo ponto de fusão. Por meio dos parâmetros utilizados, bem como da geometria da ferramenta, foi possível obter juntas da liga de alumínio 5052 H34 soldadas com: bom aspecto superficial, baixos valores de rebarba, ausência de sulcos ou vazios ao longo da linha de soldagem e com penetração total.

Primary Pulmonary Ewing’s Sarcoma: Rare Cause of Superior Vena Cava Syndrome in Children

OpenAIRE

Mehra, Shibani; Atwal, Swapndeep Singh; Garga, Umesh Chandra

2014-01-01

Ewing’s sarcoma is a common malignant bone tumour presenting in children and young adults. Rarely extra- skeletal soft tissues and visceral organs can also be the site of origin of Ewing’s sarcoma. Primary pulmonary Ewing’s sarcoma is an extremely rare malignancy which occurs in the paediatric population. We report an unusual case of primary pulmonary Ewing’s sarcoma in a nine year old girl who presented with features of superior vena cava syndrome in the emergency department. The diagnosis w...

The diagnostic importance of the recognition of the inferior Vena cava abnormalities on CT-examinations

International Nuclear Information System (INIS)

Gouliamos, A.; Striggaris, K.; Haliasos, N.; Vlahos, N.; Pontifex, G.

1981-01-01

Two unusual variations of the Vena cava inferior, as shown by CT examinations, are reported and characteristic X-rays, as well as CT scans, are presented. The first case shows an IVC course to the left of the aorta and the second case absence of the intrahepatic portion of the IVC with azygos continuation. Difficulties in the differential diagnosis are analyzed and discussed, both demonstrated by plain X-rays and CT scans. (orig.) [de

Outcome of prolonged acute vena cava occlusion after iatrogenic transection and repair in a dog

OpenAIRE

Halwagi, Marie-Chantal; Crawford, Evan; Hoddinott, Katie; Oblak, Michelle L.

2017-01-01

A 12-year-old castrated male Airedale terrier dog was diagnosed with a hepatocellular carcinoma in the right medial liver lobe. During tumor resection, inadvertent stapling and transection of the caudal vena cava occurred. Complete caval occlusion was required for 18 minutes and primary anastomosis was completed. The dog received 2 blood transfusions and developed mild pelvic limb edema after surgery. Computed tomography evaluation 9 months after surgery showed collateral circulation and susp...

Serial repositioning of a Guenther tulip retrievable inferior vena cava filter in a pediatric patient

International Nuclear Information System (INIS)

Haider, Ehsan A.; Rosen, J. Choi; Torres, Carlos; Valenti, David A.

2005-01-01

We report an 11-year-old boy who required inferior vena cava (IVC) filtration for a prolonged period of time. A retrievable IVC filter was placed and repositioned three times, providing a total of 60 days of IVC filtration. The filter was removed when his risk of pulmonary embolus had decreased substantially. This is a relatively uncommon practice in the pediatric population. The technique is presented, and the available literature is reviewed. (orig.)

Inferior vena cava/aorta diameter index in the assessment of the body fluid status – a comparative study of measurements performed by experienced and inexperienced examiners in a group of young adults

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Kaja Durajska

2014-09-01

Full Text Available The assessment of the body fluid status is one the most challenging tasks in clinical practice. Although there are many methods to assess the body fluid status of patients, none of them is fully satisfactory in contemporary medical sciences. In the article below, we compare the results of measurements performed by experienced and inexperienced examiners based on the inferior vena cava/aorta diameter index in a sonographic hydration assessment. The study enrolled 50 young students at the age of 19–26 (the median age was 22.95 including 27 women and 23 men. The volunteers were examined in the supine position with GE Logiq 7 system and a convex transducer with the frequency of 2–5 MHz. The measurements were performed in the longitudinal and transverse planes by two inexperienced examiners – the authors of this paper, following a four-hour training conducted by an experienced sonographer. The longitudinal values of the inferior vena cava/aorta diameter index obtained in this study were similar to those found in the literature. The reference value for the inferior vena cava/aorta index determined by Kosiak et al., which constituted 1.2 ± 2 SD, for SD = 0.17, was similar to the values obtained by the authors of this paper which equaled 1.2286 ± 2 SD, for SD = 0.2. The article presented below proves that measuring the inferior vena cava/aorta diameter index is not a complex examination and it may be performed by physicians with no sonographic experience. Furthermore, the paper demonstrates that the inferior vena cava/aorta diameter index measured in the transverse plane is similar to the inferior vena cava/aorta diameter index determined in the longitudinal plane. Thus, both measurements may be used interchangeably to assess the hydration status of patients.

Um olhar sobre as benzedeiras de Juruena (Mato Grosso, Brasil e as plantas usadas para benzer e curar

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Márcia Regina Antunes Maciel

Full Text Available O 'benzimento' é forma antiga no tratamento de várias doenças, utilizada na Europa desde a Idade Média. No Brasil, os benzedores surgiram a partir do século XVII. Interpretações dos conhecimentos, uso tradicional dos recursos vegetais e manejo realizado por benzedores, raizeiros e parteiras são fonte de pesquisa nos estudos etnobotânicos. Benzedores indicam plantas para efeito de cura ou como amuletos protetores, com a presença destas formas de uso da flora na cultura popular. Este estudo foi realizado em Juruena, Mato Grosso, com aplicação de técnicas de observação participante, entrevistas semi-estruturadas (questões abertas/fechadas gravadas e amostras intencionais e a realizção de coleta de material botânico, depositado no Herbário da Universidade Federal do Mato Grosso (UFMT. Teve o objetivo de compreender a importância das benzedeiras, identificar etnobotanicamente as plantas utilizadas, formas de prescrição e manipulação. Foram entrevistadas quatro benzedeiras no período de setembro de 2002 a novembro de 2003, as quais demonstraram um conhecimento etnobotânico expressivo. Estas benzem, preparam e receitam chás, garrafadas, banhos e ungüentos. As enfermidades tratadas foram agrupadas em duas categorias: doenças físicas (dorde-dente, dor-de-barriga, verminoses, cobreiro, arca-caída, rendidura, erisipela etc e doenças espirituais (quebranto, mau-olhado, pessoas carregadas, encosto. Foram relatadas 87 etnoespécies, distribuídas em 31 famílias botânicas, dentre as quais se salientam erva-de-Santa-Maria (Chenopodium ambrosioides L., chapéu-de-couro (Echinodorus macrophyllus MIq., quina-do-mato (Strychnos sp St.Hil., ipê-roxo (Tabebuia heptaphylla (Vell. Toledo, arruda (Ruta graveolens L., guiné (Petiveria alliacea L. e comigo-ninguém-pode (Dieffenbachia picta L. A medicina popular praticada pelas benzedeiras vem ao encontro dos anseios das pessoas que buscam alívio para seus males, com valores e heran

Hibridación in situ para la detección de Streptococcus agalactiae en tejidos de tilapia (Oreochromis sp.

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E. A. Pulido

2010-04-01

Full Text Available La estreptococosis es uno de los problemas sanitarios más serios en la acuicultura mundial.En Colombia la enfermedad afecta de manera importante las explotaciones detilapia. Se estandarizó la técnica de hibridación in situ (HIS en tejidos de tilapia previamenteidentificados como positivos a la presencia de S. agalactiae por la técnicade inmunoperoxidasa indirecta (IPI y microbiología. Se obtuvo señal positiva en elinterior de los granulomas con una especificidad del 100%. Se logró amplificar significativamentela señal mediante el uso de la tiramida. La HIS en tejidos de tilapia puedeser usada para el diagnóstico y estudios de patogenésis y epidemiológicos con este microorganismo.Se requieren futuras investigaciones para optimizar la marcación de lasbacterias libres en los tejidos y evaluar la sensibilidad de la técnica.

Transcatheter closure of patent ductus arteriosus and interruption of inferior vena cava with azygous continuation using an Amplatzer duct occluder II

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Koh Ghee

2009-01-01

Full Text Available We report a case of transcatheter closure of patent ductus arteriosus using the new Amplatzer duct occluder II in an adult patient with interrupted inferior vena cava with azygous continuation via the femoral artery approach.

Clinical research of the obstructive interface morphology of the inferior vena cava and the method of choice for taking the 'pierce membrane'

International Nuclear Information System (INIS)

Wei Ning; Zu Maoheng; Xu Hao; Gu Yuming; Li Guojun; Zhang Qingqiao; Xu Wei; Liu Hongtao

2008-01-01

Objective: To evaluate the relation between the morphology of the obstructive interface of the inferior vena cava (IVC)and the method of choice for taking the 'pierce membrane'. Methods: Interventional therapy was performed in 155 patients with obstruction of inferior vena cave during 2003-2005. The types of proximal part and distal end of obstruction were classified on the base of inferior vane cavography and divid[d into two groups accordingly. The principle of taking 'pierce membrane' whether as accending or descending route was decided by the morphology of the obstructive interface. The complication rates of taking 'pierce membrane' were compared between the two groups including one of 2003-2005 and another of 1990 -1997 as the control. Results: 155 cases were classified to 7 types according to morphology of inferior vena cava obstruction of the distal interface, the type of membrane with hole (32 cases), the dome type (50 cases), the taper type (17 cases), the horizontal type (13 cases), the inclination type (10 cases), the irregular type (19 eases)and the type of obstruction with communicating branches (14 cases). The morphologies of the proximal part of the obstruction were mainly divided into the type of membrane with hole, dome type, taper type and horizontal type. All the cases were successfully taken 'pierce membrane', without complication of pericardial effusion and abdominal bleeding. In control group of 150 Budd-Chiari syndrome cases with obstruction of inferior vena cava, the complications of taking 'pierce membrane' included mis puncture into pericardium (16 cases) and abdominal hemorrhage because of rupturing the inferior vena cava in 2 cases. Comparing the two groups, there was statistical significance with severe complications. Conclusions: 'Pierce membrane' interventional technique for the obstruction of inferior vena eava by coinciding the morphology of the obstructive interface with suitable piercing direction can not only raise successful

Desenvolvimento de um ambiente virtual de ensino em histologia para estudantes da saúde

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Daniel Fernando Pereira Vasconcelos

Full Text Available As tecnologias da informação e da comunicação (TICs têm sido amplamente utilizadas no ensino da saúde. As plataformas usadas para o desenvolvimento do ambiente virtual de ensino (AVE geralmente apresentam uma linguagem de informática complexa. O objetivo deste trabalho foi desenvolver um AVE em Histologia voltado para estudantes da área da saúde, disponibilizado na internet com o uso de uma plataforma de uso gratuito e livre. O material elaborado utilizou diferentes TICs, como: animações, vídeos, atlas virtual, aulas virtuais, simulados online e chat. Foi desenvolvido um AVE com uso da plataforma online wordpress.org, que apresentou as seguintes vantagens: fácil manipulação, gerenciamento e atualização do site; interface simples; ampla quantidade de plugins disponíveis, que supriram as necessidades primárias do AVE; e utilização gratuita e livre. Embora esse recurso possa facilitar o aprendizado em Histologia, é preciso avaliar sua efetividade.

Sequential Venoplasty for Treatment of Inferior Vena Cava Stenosis Following Liver Transplant

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Ahmad Parvinian

2014-01-01

Full Text Available Obstruction of the inferior vena cava (IVC is a rare complication of liver transplantation with significant consequences including intractable ascites and hepatic dysfunction. Although venoplasty and stenting are effective in many cases, patients who fail first-line treatment may require surgical intervention or re-transplantation. Scheduled sequential balloon dilation, an approach frequently used to treat fibrotic, benign biliary strictures, but less commonly vascular lesions, may avert the need for such high-risk alternatives while achieving favorable clinical and angiographic response. Herein, we report the case of a 36-year-old woman with transplant-related, initially angioplasty-resistant IVC stenosis that was successfully treated with sequential balloon dilation.

Fibrosing mediastinitis and thrombosis of superior vena cava associated with Behcet's disease

International Nuclear Information System (INIS)

Harman, Mustafa; Sayarlioglu, Mehmet; Arslan, Halil; Ayakta, Hayati; Harman, Ece

2003-01-01

We present CT, MRI and venography findings in 13-year boy with mediastinal fibrosis and superior vena cava (SVC) thrombosis associated with Behcet's disease. Fibrosing mediastinitis is an excessive fibrotic reaction that occurs in the mediastinum and may lead to compression of mediastinal structures (especially vascular). This condition is usually idiopathic, though many (and perhaps most) cases in the USA are thought to be caused by an abnormal immunologic response to Histoplasma capsulatum infection. SVC syndrome secondary to extrinsic compression by mediastinal fibrosis combined with Behcet's disease has rarely been described. Radiological investigations of this syndrome are necessary to avoid a useless anticoagulant therapy

Ultrasound-guided catheterization of the left subclavian vein without recognition of persistent left superior vena cava

OpenAIRE

Park, Sun Young; Yoo, Jae Hwa; Kim, Mun Gyu; Kim, Sang Ho; Park, Byoung-Won; Oh, Hong Chul; Kim, Hojoon

2017-01-01

Abstract Rationale: A persistent left superior vena cava (PLSVC) is rare, but the most common thoracic venous anomaly. We report a case of PLSVC unrecognized during left subclavian vein catheterization using real-time ultrasound-guided supraclavicular approach. Patient concerns: A 79-year-old man with history of hypertension presented with traumatic subdural hemorrhage, subarachnoid hemorrhage, and epidural hemorrhage. Before the operation, a central venous catheter (CVC) was placed into the ...

Superior Vena Cava Syndrome in a Patient with Small-Cell Lung Cancer: A Case Report

OpenAIRE

Christina Brzezniak; Bryan Oronsky; Corey A. Carter; Bennett Thilagar; Scott Caroen; Karen Zeman

2017-01-01

Superior vena cava (SVC) syndrome, a potential oncologic emergency, is closely associated with malignancy and right-sided lung cancer in particular. A case of SVC syndrome presenting with facial swelling, neck distension, and enlarged veins of the upper chest, which developed over a period of 5 weeks in a 46-year-old patient on a clinical trial with small-cell lung cancer, is reported. Computed tomography scan of the chest revealed slight enlargement of a superior conglomerate mediastinal lym...

Biodisponibilidade de cobre de diferentes fontes para coelhos

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Cavalcante S.G.

2002-01-01

Full Text Available Utilizaram-se 140 coelhos das raças Nova Zelândia Branco e Califórnia, com 60 dias de idade, de ambos os sexos, distribuídos em 14 tratamentos experimentais, com o objetivo de determinar a biodisponibilidade de cobre (Cu de três fontes inorgânicas, óxido de cobre (tratamento OC, sulfato de cobre (tratamento SC e carbonato de cobre (tratamento CC e uma orgânica, quelato de cobre (tratamento QC, usadas nas concentrações de 0, 20, 40, 80 e 160 ppm para a curva padrão. O maior consumo de ração ocorreu nos tratamentos 80SC, 80OC, 40SC, 160SC, 0C, 20SC, 40CC e 40OC e os menores resultados nos tratamentos 160QC, 40QC, 80CC, 160CC e 160OC (R²= 0,1913. Para ganho de peso o melhor tratamento foi 80SC e o pior 80CC (R²=0,2358. Para conversão alimentar, os tratamentos 80CC, 80SC, 0C, 20SC e 80QC apresentaram nessa ordem os maiores valores e o menor valor foi em 40QC. Para o cobre no fígado, o tratamento 160CC apresentou o maior valor, e 80SC e 40SC os menores. Não houve diferenças com relação ao sexo, mas os animais Nova Zelândia Branco apresentaram maior deposição de cobre. Pelos resultados chegou-se à equação de regressão: Y Cu= 1,37 + 3,83 x1 + 2,77 x2 + 2,83 x3 + 2,84 x4 + 2,84 x5 (R² = 0,3288.

Caracterización del proceso y herramientas metodológicas de la ingeniería de requerimientos para aplicaciones de sistemas de información geográfica

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Luis Fernando Medina Cardonal

2007-01-01

Full Text Available Este artículo describe el proceso de la ingeniería de requerimientos y las herramientas metodológicas usadas en aplicaciones de sistemas de información geográfica (SIG ante la ausencia de una alternativa integral y consistente específica para este dominio. Para ello, por un lado, se introduce la problemática de la ingeniería de requerimientos en aplicaciones SIG, se exhiben los tipos de requerimientos, actores involucrados y aspectos comunicativos relevantes en el proceso de requerimientos y se clasifican las metodologías existentes en lenguajes de modelamiento y especificación. Adicionalmente, se presentan los estándares geomáticos como un elemento transversal a tener en cuenta en las aplicaciones SIG.

AISLAMIENTO Y CARACTERIZACION DE UNA LEVADURA FLOCULANTE PARA PRODUCIR ETANOL DEL BANANO DE RECHAZO

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CARLOS GUEVARA-BRAVO

Full Text Available Fue aislada y caracterizada una cepa de levadura Saccharomycescerevisiae LEG-06, con características floculantes para fermentar jugo de banano extraído bajo condiciones básicas. Los rendimientos de etanol fueron comparados con levaduras comerciales y además fueron evaluados los efectos del pH y del agente neutralizante. Adicionalmente se evaluó el efecto sobre la eficiencia de 10 fermentaciones sucesivas usando la misma levadura. Finalmente, se escaló la fermentación a 40 L en reactor tubular con agitación mecánica y se determinaron los parámetros cinéticos de la levadura. Las condiciones ideales fueron: pH 5,5 utilizando ácido cítrico como neutralizante, 23,8 g/L de levadura, 14,5°Brix. La eficiencia estuvo entre 82-84% y el pH óptimo de floculación entre 5,5 y 6,0. La concentración de etanol obtenido en las mejores condiciones alcanzó el 7,5%. Estos resultados demuestran la levadura como la metodología usada, presentan las características adecuadas y deseadas para desarrollar un proceso a nivel de planta piloto para la producción de etanol a partir de banano de rechazo.

Cerebral Fat Embolism in a Trauma Patient with Captured Imaging of Echogenic Emboli in the Inferior Vena Cava

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Nancy N. Wang

2016-12-01

Full Text Available The authors present a case of fat embolism syndrome after traumatic long-bone fracture in a patient with rapid neurologic deterioration and multiple cerebral embolic events. Diagnostic workup revealed the neuroradiologic findings classically described with cerebral fat emboli. The authors present hallmark ultrasound imaging of echogenic material actively traveling through the inferior vena cava.

Bilateral Breast Enlargement: An Unusual Presentation of Superior Vena Cava Obstruction in a Hemodialysis Patient with Fibrosing Mediastinitis

International Nuclear Information System (INIS)

Goo, Dong Erk; Kim, Yong Jae; Choi, Deuk Lin; Kwon, Kui Hyang; Yang, Seung Boo

2011-01-01

A 67-year-old woman with end-stage renal disease presented with profound edema of both breasts. The presence of a patent hemodialysis basilic transposition fistula and superior vena cava obstruction (SVC), due to fibrosing mediastinitis, was demonstrated by the use of fistulography. Endovascular treatment with a balloon and stent caused immediate resolution of the breast edema.

Correlation of inferior vena cava (ivc) diameter and central venous pressure (cvp) for fluid monitoring in icu

International Nuclear Information System (INIS)

Khalil, A.; Hayat, A.

2015-01-01

To determine intravascular fluid status in critically ill patients using inferior vena cava diameter and correlating it with central venous pressure. Study Design: Cross sectional study. Place and Duration of Study: Intensive care department, Military Hospital Rawalpindi from Jan 2013 to Aug 2013. Material and Methods: We included 115 adult patients of both genders in age range of 18 to 87 years by consecutive sampling admitted in intensive care unit. Ultrasound guided IVC diameter was assessed in supine patients. Data was simultaneously collected from the CVP catheter. Variables included in study were age, gender, CVP, IVC diameter. Results: CVP ranged from -4 to 26 cm H/sub 2/O with mean of 8 cm H/sub 2/O (SD = 6.24). Mean IVC diameters increased with increase in CVP. Correlation between CVP and max IVC diameter was moderate and significant (r = 0.53, p < 0.001). Correlation between CVP and min IVC diameter was also moderate and significant (r = 0.58, p < 0.001). Conclusion: A simple bedside sonography of inferior vena cava diameter correlates well with extremes of CVP values and can be helpful in assessing intravascular fluid status in these patients. (author)

CONTRIBUIÇÕES PARA A GESTÃO DE REDES INTERORGANIZACIONAIS: FATORES DETERMINANTES PARA A SAÍDA DE EMPRESAS PARCEIRAS

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Leander Luiz Klein

Full Text Available As redes de cooperação entre empresas são estratégias usadas pelos gestores para atuar no mercado com o intuito de gerar mais valor às empresas e obter vantagem competitiva. Entretanto, verifica-se empiricamente que um número significativo de empresas saem das redes em que estavam inseridas. Nesse sentido, este estudo tem como objetivo identificar os fatores determinantes da saída de empresas das redes interorganizacionais das quais participavam. Para isso, foi realizado um estudo quantitativo com 140 empresas que pertenciam a redes de cooperação do estado do Rio Grande do Sul, Brasil. Para a coleta de dados, foi utilizado um questionário formado por 15 dimensões distintas, cada uma composta por 5 questões. Os dados foram tabulados em uma planilha do Excel e, posteriormente, analisados com a utilização do sofware AMOS 18. Os resultados confirmaram como fatores determinantes da saída das empresas das redes os Laços Sociais Anteriores Fracos, Seleção de Parceiros não estruturada, Gestão Individualizada, Falta de Confiança e Comprometimento, Baixa de Aprendizagem Interorganizacional, dentre outros. Os fatores determinantes encontrados nessa pesquisa ressaltaram a dificuldade que impera sobre as estruturas de governança e a gestão de redes. O desafio é organizar a rede de forma a evitar possíveis disfunções oriundas das decisões da gestão e amenizar os problemas identificados, fazendo com que as empresas se mantenham nas redes, gerando retornos e vantagens competitivas a elas.

Construcción y explotación de una planta piloto de electrodiálisis para concentración de salmuera de rechazo de desalación

OpenAIRE

Lourenço Luis, Sérgio Miguel

2009-01-01

Actualmente, la escasez de agua para consumo humano generó una búsqueda por novas tecnologías que permitan satisfacer las necesidades humanas. Las tecnologías de desalinización presentan una solución, el agua de mar es un bien abundante en nuestro planeta, así que la desalinización es una plus valía, entre muchas otras tecnologías de desalinización encontramos la osmosis inversa, esta es ampliamente usada, sin embrago esta genera un rechazo o vertido que tiene que ser tratado. Entonces surge ...

Inhibitory Effects of Ecklonia cava Extract on High Glucose-Induced Hepatic Stellate Cell Activation

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Akiko Kojima-Yuasa

2011-12-01

Full Text Available Nonalcoholic steatohepatitis (NASH is a disease closely associated with obesity and diabetes. A prevalence of type 2 diabetes and a high body mass index in cryptogenic cirrhosis may imply that obesity leads to cirrhosis. Here, we examined the effects of an extract of Ecklonia cava, a brown algae, on the activation of high glucose-induced hepatic stellate cells (HSCs, key players in hepatic fibrosis. Isolated HSCs were incubated with or without a high glucose concentration. Ecklonia cava extract (ECE was added to the culture simultaneously with the high glucose. Treatment with high glucose stimulated expression of type I collagen and α-smooth muscle actin, which are markers of activation in HSCs, in a dose-dependent manner. The activation of high glucose-treated HSCs was suppressed by the ECE. An increase in the formation of intracellular reactive oxygen species (ROS and a decrease in intracellular glutathione levels were observed soon after treatment with high glucose, and these changes were suppressed by the simultaneous addition of ECE. High glucose levels stimulated the secretion of bioactive transforming growth factor-β (TGF-β from the cells, and the stimulation was also suppressed by treating the HSCs with ECE. These results suggest that the suppression of high glucose-induced HSC activation by ECE is mediated through the inhibition of ROS and/or GSH and the downregulation of TGF-β secretion. ECE is useful for preventing the development of diabetic liver fibrosis.

A fractured inferior vena cava filter strut migrating to the left pulmonary artery

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Tamer Hudali

2015-01-01

Full Text Available Inferior vena cava filters are increasingly used in patients with recurrent venous thromboembolism who are contraindicated to anticoagulation. Migration of a broken strut to the pulmonary artery is a very rare complication of these filters. We report the case of an 83-year-old female who experienced this complication with the migratory strut remaining in the same position for years. This case provides evidence that such filters probably have higher rates of complications than what has been thought that remain asymptomatic. The indications and the management of complications of such devices need to be studied further.

Limitations of using synthetic blood clots for measuring in vitro clot capture efficiency of inferior vena cava filters

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Robinson RA

2013-05-01

Full Text Available Ronald A Robinson, Luke H Herbertson, Srilekha Sarkar Das, Richard A Malinauskas, William F Pritchard, Laurence W GrossmanOffice of Science and Engineering Laboratories, Center for Devices and Radiological Health, US Food and Drug Administration, Silver Spring, MD, USAAbstract: The purpose of this study was first to evaluate the clot capture efficiency and capture location of six currently-marketed vena cava filters in a physiological venous flow loop, using synthetic polyacrylamide hydrogel clots, which were intended to simulate actual blood clots. After observing a measured anomaly for one of the test filters, we redirected the focus of the study to identify the cause of poor clot capture performance for large synthetic hydrogel clots. We hypothesized that the uncharacteristic low clot capture efficiency observed when testing the outlying filter can be attributed to the inadvertent use of dense, stiff synthetic hydrogel clots, and not as a result of the filter design or filter orientation. To study this issue, sheep blood clots and polyacrylamide (PA synthetic clots were injected into a mock venous flow loop containing a clinical inferior vena cava (IVC filter, and their captures were observed. Testing was performed with clots of various diameters (3.2, 4.8, and 6.4 mm, length-to-diameter ratios (1:1, 3:1, 10:1, and stiffness. By adjusting the chemical formulation, PA clots were fabricated to be soft, moderately stiff, or stiff with elastic moduli of 805 ± 2, 1696 ± 10 and 3295 ± 37 Pa, respectively. In comparison, the elastic moduli for freshly prepared sheep blood clots were 1690 ± 360 Pa. The outlying filter had a design that was characterized by peripheral gaps (up to 14 mm between its wire struts. While a low clot capture rate was observed using large, stiff synthetic clots, the filter effectively captured similarly sized sheep blood clots and soft PA clots. Because the stiffer synthetic clots remained straight when approaching the

[Value of x-ray computed tomography in the study of the inferior vena cava in urologic practice].

Science.gov (United States)

Barré, C; Vialle, M; Rieux, D; Caron-Poitreau, C; Soret, J Y; Rognon, M

1985-01-01

The CT scan provides a reliable evaluation of the inferior vena cava, especially since the development of second and third generation scanners. It can readily detect congenital malformations and obstructive anomalies complicating renal cancer and it is also able to determine the tumoral or thrombotic nature of the venous obstruction. This excellent definition of the vessel reduces the indications for caval angiography to a few exceptional cases.

Life-threatening Cerebral Edema Caused by Acute Occlusion of a Superior Vena Cava Stent

International Nuclear Information System (INIS)

Sofue, Keitaro; Takeuchi, Yoshito; Arai, Yasuaki; Sugimura, Kazuro

2013-01-01

A71-year-old man with advanced lung cancer developed a life-threatening cerebral edema caused by the acute occlusion of a superior vena cava (SVC) stent and was successfully treated by an additional stent placement. Although stent occlusion is a common early complication, no life-threatening situations have been reported until now. Our experience highlights the fact that acute stent occlusion can potentially lead to the complete venous shutdown of the SVC, resulting in life-threatening cerebral edema, after SVC stent placement. Immediate diagnosis and countermeasures are required.

Recuperação em área de empréstimo usada para construção de usina hidrelétrica Recovery of nativa area used for construction of hydroelectric power station

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Marlene C. Alves

2012-08-01

Full Text Available A recuperação de áreas de empréstimo usada para construção de hidrelétricas é um processo lento que requer o uso de plantas de cobertura, como fonte de matéria orgânica e a aplicação de nutrientes e corretivos como condicionadores dos atributos do solo. Portanto, objetivou-se, com este trabalho, estudar a recuperação de atributos físicos do subsolo de um Latossolo Vermelho distrófico, utilizado no terrapleno e fundação da Usina Hidrelétrica de Ilha Solteira, SP. O delineamento utilizado foi em blocos casualizados com oito tratamentos e quatro repetições. A pesquisa foi implantada em 1992. Os tratamentos se constituíram do uso de adubos verdes, braquiária e correção do solo. Após 13 anos foram avaliados: porosidade total do solo, macroporosidade, microporosidade, densidade do solo, estabilidade de agregados, resistência do solo à penetração, teor de matéria orgânica e produção de matéria seca da braquiária. Os tratamentos adotados estão recuperando, de forma lenta, os atributos físicos do subsolo exposto. Os efeitos da recuperação do solo estão atingindo a profundidade de 0-0,10 m.The recovery of native area used in hydroelectric power station construction is a slow process, and it requires the use of covering plant as a source of organic matter, application of nutrients and amendments as soil conditioner. Thus, this study has the objective to study the recovery of physical attribute of subsoil in a distrophic Red Latosol, used in the embankment and foundation of Hydroelectric Power Station, Ilha Solteira, São Paulo, Brazil. The design used was randomized blocks with eight treatments and four replications. The research started in 1992. The treatments consisted of green manure, pasture and soil amendment. After 13 years, total porosity, macroporosity, microporosity, bulk density, aggregate stability, resistance to penetration, organic matter of soil and dry matter of pasture production were evaluated. The

Radiographic evaluation of caudal vena cava size in dogs

International Nuclear Information System (INIS)

Lehmkuhl, L.B.; Bonagura, J.D.; Biller, D.S.; Hartman, W.M.

1997-01-01

Dilation of the caudal vena cava (CVC) on lateral thoracic radiographs is often interpreted as suggestive of right-sided congestive heart failure, To quantitate the clinical utility of evaluating CVC size as an indicator of right-sided heart disease, we compared the ratio of the diameter of the CVC as measured on a left lateral thoracic radiograph to the descending aorta (Ao), length of the thoracic vertebra above the tracheal bifurcation (VL), and width of the right fourth rib (R4) in 35 dogs with right heart disease and 35 control dogs, Each CVC ratio(CVC/Ao, CVC/VL, CVC/R4) was statistically larger in dogs with right heart disease, Response operating characteristic curves and likelihood ratios were used to determine ratios helpful in identifying dogs with right heart disease. A CVC/Ao > 1.50, CVC/VL > 1.30, or CVC/R4 > 3.50 are strongly suggestive of a right-sided heart abnormality in a patient

Detección de Anticuerpos IgG Específicos para Sarampión mediante la Técnica de Inmunofluorescencia Indirecta

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Mónica Nieto Z

2000-01-01

Full Text Available La técnica de ínmunofluorescencia indirecta para detectar anticuerpos IgG específicos a sarampión (IFI-IgG fue evaluada con la prueba de neutralización por reducción de placas (PRN con 128 muestras de suero de personas con edades entre 0 y 15 años, 64 con antecedente de vacunación y 64 sin éste antecedente. El IFI-IgG alcanzó una sensibilidad de 80,4% y una especificidad de 100,0%, mostrando ser una prueba sencilla, reproducible, y tener correlación con PRN, aunque menos sensible que ésta última, especialmente cuando la PRN estimó títulos bajos de anticuerpos. Se concluye que la técnica IFI-IgG puede ser usada como método de rutina para la confirmación de sarampión en muestras de fase aguda y convalesciente de la enfermedad (sueros pareados, así como para estudios de prevalencia de anticuerpos en la comunidad, aunque no reemplazaría a la PRN.

El trabajo colegiado, un espacio para narrar las experiencias desde la práctica docente

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Maríadel Rosario Landín Miranda

2016-01-01

Full Text Available Gestionar el aprendizaje y reaprendizaje durante el profesorado es todo un reto y todo un campo de estudio, por ello, en este trabajo, presentamos nuestra experiencia en la implementación de un proyecto de intervención que tuvo como propósito principal, generar un espacio colegiado para el aprendizaje de las experiencias docentes. El proyecto se implementó en la Escuela Secundaria Artículo 3° de Poza Rica, Veracruz, México, durante el periodo de agosto de 2014 a julio de 2015. La metodología base usada para el desarrollo del proyecto, fue la metodología APRA (Acceso, Permanencia y Rendimiento Académico, que es una propuesta de intervención que considera los elementos fundamentales que apoyan los procesos sistemáticos de cambio y mejora institucional. La estrategia de trabajo transversal empleada durante la intervención fue la narrativa, apoyada de otras estrategias, como el cuaderno docente, la narración de experiencias docentes, el trabajo colegiado con retroalimentación grupal y la autoevaluación.

Menores em conflito com a lei em Moçambique: reflexões sobre medidas socioeducativas e limites para sua aplicação prática

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Tomás Xavier Francisco

2014-06-01

Full Text Available Este artigo tem por fim analisar, por um lado, a problemática dos adolescentes em conflito com a lei em Moçambique, e por outro lado, fazer reflexões sobre as medidas socioeducativas e limites para a sua aplicação prática. O trabalho contempla uma introdução, desenvolvimento onde arrola-se considerações sobre o histórico da legislação sobre adolescentes ou menores no país, reflexões sobre medidas socioeducativas e seus limites para sua aplicação prática, e por fim, contempla considerações finais e referências bibliográficas. A metodologia usada foi estudo exploratório, recorrendo-se a pesquisa bibliográfica e análise documental.

Arqueologia Romana em Israel: o uso da Petrografia Cerâmica para análises de cultura material.

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Marcio Teixeira Bastos

2015-10-01

Full Text Available O presente artigo analisa o uso e a contribuição da metodologia de Petrografia Cerâmica face ao desenvolvimento da Arqueologia Romana, Arqueometria e os Estudos Clássicos no Brasil. Lucernas romanas de três distintos contextos arqueológicos intra-sítio de Cesareia Marítima, Israel, foram amostradas e usadas para aplicação da metodologia. As considerações do artigo suscitam questões a respeito da manipulação, relações de produção e consumo, assim como comércio e agência dos artefatos nas províncias do Império Romano.

Eficacia de una crema dental para dientes sensibles con citrato de potasio al 5,6% y fluoruro de sodio al 0,3%: ensayo clínico aleatorizado controlado

OpenAIRE

Ramón Morales, Oscar Miguel; Londoño, Walter; González Ortíz, Leydi Yisela; González Patiño, Elizabeth; Blandón, Nadya; García González, Nora Patricia

2010-01-01

Introducción: las sales de potasio y el flúor han sido usadas en el tratamiento de la hipersensibilidad dentinaria. El objetivo de este estudio fue determinar la eficacia de una crema dental para dientes sensibles con citrato de potasio al 5,6% y fluoruro de sodio al 0,3%, en la disminución de los síntomas de hipersensibilidad dentinaria. Métodos: se obtuvo una muestra aleatoria de 100 personas, hombres y mujeres, mayores de 18 años procedentes del Valle de Aburrá; que presentaran hipersen...

Uma eleição para nossos tempos: tweeter, escândalos, traição, ameaças, reality TV

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Eva Paulino Bueno

2016-12-01

Full Text Available Este ensaio fala das últimas eleições nos Estados Unidos, enfatizando as técnicas usadas pelos dois candidatos. Ele também discute as acusações de Trump contra os mexicanos americanos, sua promessa de construir um muro, de manter os muçulmanos fora do país, e sua atitude para com as mulheres. Este ensaio também relata como, depois das eleições, até mesmo aqueles republicanos que se haviam distanciado das referências vulgares de Trump contra as mulheres, agora estão tentando conseguir posições dentro do seu governo.

Cromatografía de exclusión molecular como metodología para la purificación de bacteriófagos

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Frank Camacho

2012-04-01

Full Text Available La cromatografía de exclusión molecular puede ser usada para purificar fagos filamentosos, el virus bacteriano más usado en la tecnología de presentación de péptidos y proteínas en la superficie de los fagos. El bacteriófago, luego de ser precipitado del sobrenadante de cultivo con polietilenglicol, fue aplicado a una columna de Sepharose CL-4B de 100 cm de altura, usando como fase móvil solución tampón fosfato (PBS. Se obtuvo un 61,3% de recobrado del fago total aplicado y, mediante el análisis por SDS-PAGE, se verificó la pureza de estas preparaciones. La cromatografía de exclusión molecular es una metodología atractiva para la obtención de preparaciones de bacteriófagos con alta pureza.

Validação de escalas para avaliação do amor patológico

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Marina Perito Berti

2011-01-01

Full Text Available CONTEXTO: Diversas metodologias foram desenvolvidas para validar instrumentos psicométricos. No entanto, na literatura científica, há escassez de instrumentos para avaliar os relacionamentos amorosos. OBJETIVO: O presente trabalho tem como objetivo validar para o português o conteúdo dos instrumentos autoaplicáveis Love Attitudes Scale (Escala de Atitudes do Amor - Hendrick et al., 1998, Relationship Assessment Scale (Escala de Avaliação do Relacionamento - Hendrick, 1988 e Adult Attachment Types (Tipos de Apego do Adulto - Hazan et al., 1987, levando em consideração o contexto cultural brasileiro e, consequentemente, possibilitando que o estudo do amor patológico seja viável na população brasileira. MÉTODOS: Tal processo envolveu quatro etapas: (1 tradução para o português, (2 retrotradução, (3 apresentação da versão corrigida para profissionais de saúde mental e estudantes universitários e (4 aplicação da versão final em amostra da população-alvo utilizando uma escala analógico-visual. RESULTADOS: As escalas foram facilmente compreendidas e discriminaram significativamente indivíduos com amor patológico de voluntários saudáveis. CONCLUSÃO: Nossos resultados mostram que a versão brasileira desses instrumentos é válida e pode ser usada em investigações envolvendo relacionamentos amorosos.

Impact of evolving strategy on clinical outcomes and central pulmonary artery growth in patients with bilateral superior vena cava undergoing a bilateral bidirectional cavopulmonary shunt.

Science.gov (United States)

Honjo, Osami; Tran, Kim-Chi D; Hua, Zhongdong; Sapra, Priya; Alghamdi, Abdullah A; Russell, Jennifer L; Caldarone, Christopher A; Van Arsdell, Glen S

2010-09-01

We reported a high incidence of thrombosis, central pulmonary artery hypoplasia, and mortality for bilateral bidirectional cavopulmonary shunts. We hypothesized that technical modifications in the cavopulmonary anastomosis and anticoagulation would limit thrombus and central pulmonary artery hypoplasia, and thereby improve outcomes. Sixty-one patients (median age, 8.4 months; weight, 6.6 kg) underwent bilateral bidirectional cavopulmonary shunt from 1990 to 2007. The cohort was divided into 2 groups: 1) the conventional group (1990-1999, n = 37) and 2) the V-shaped group, with a hemi-Fontan or modification in which the cavae were anastomosed to the pulmonary artery adjacent to each other so they formed the appearance of a V (1999-2007, n = 24). Central and branch pulmonary artery growth, survival, and reinterventions were determined. The pre-Fontan study showed equivalent superior venae cavae and Nakata indices. The central pulmonary artery index and central pulmonary artery/Nakata index ratio were significantly higher in the V-shaped group (P analysis showed anastomotic strategy, low saturation, and thrombosis were predictors for death. Anastomotic strategy, lack of anticoagulation, thrombosis, and small superior venae cavae were predictors for reintervention (P strategy affected reintervention. Anastomotic strategy and postoperative thrombus affected mortality. 2010 The American Association for Thoracic Surgery. Published by Mosby, Inc. All rights reserved.

Uma análise comparativa de funções MDX nos servidores Analysis Services e Mondrian

OpenAIRE

ALBUQUERQUE, Erivam Anselmo de

2013-01-01

A MultiDimensional eXpression (MDX) é uma linguagem de consulta para processamento analítico de dados ou On-line Analytical Processing (OLAP). Apesar de esta linguagem ser usada pela maioria dos servidores OLAP, esta não é um padrão de direito. Portanto, tem-se pouca (ou nenhuma) garantia de que as funções MDX usadas por um servidor OLAP também possam ser usadas em outros servidores. Neste contexto, de forma a comparar as funções MDX de um servidor OLAP de código aberto e outro de código fech...

Experimental investigation of the effects of inserting a bovine venous valve in the inferior vena cava of Fontan circulation

Science.gov (United States)

Santhanakrishnan, Arvind; Johnson, Jacob; Kotz, Monica; Tang, Elaine; Khiabani, Reza; Yoganathan, Ajit; Maher, Kevin

2012-11-01

The Fontan procedure is a palliative surgery performed on patients with single ventricle (SV) congenital heart defects. The SV is used for systemic circulation and the venous return from the inferior vena cava (IVC) and superior vena cava (SVC) is routed to the pulmonary arteries (PA), resulting in a total cavopulmonary connection (TCPC). Hepatic venous hypertension is commonly manifested in the Fontan circulation, leading to long-term complications including liver congestion and cirrhosis. Respiratory intrathoracic pressure changes affect the venous return from the IVC to the PA. Using a physical model of an idealized TCPC, we examine placement of a unidirectional bovine venous valve within the IVC as a method of alleviating hepatic venous hypertension. A piston pump is used to provide pulsatility in the internal flow through the TCPC, while intrathoracic pressure fluctuations are imposed on the external walls of the model using a pair of linear actuators. When implanted in the extrathoracic position, the hepatic venous pressure is lowered from baseline condition. The effects of changing caval flow distribution and intrathoracic pressure on TCPC hemodynamics will be examined.

Diseño de Reglas Gramaticales para Transformar Documentos Técnicos Corporativos Escritos en Lenguaje Natural en Discursos Controlados

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Carlos Mario Zapata Jaramillo

2013-04-01

Full Text Available La educción de requisitos es una de las fases más importantes en el proceso de desarrollo de software. La revisión de documentos es una de las técnicas menos usadas para educir requisitos. La literatura sugiere usarla en esta fase sobre descripciones del dominio y documentos corporativos. Aplicando esta técnica, los analistas pueden extraer conocimiento del dominio e información del negocio. En este artículo se define un marco estructural de un tipo de documento técnico corporativo, relacionado con la especificación de procedimientos. A partir de este marco, se propone un conjunto de reglas gramaticales para transformar ciertas secciones del documento técnico en un discurso en el lenguaje controlado UN-Lencep. Estas reglas se pueden aplicar posteriormente en procesos de educción de requisitos a partir de la técnica de revisión de documentos.

Hibridación in situ para la detección de streptococcus agalactiae en tejidos de tilapia (oreochromis sp.

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E. A. Pulido

2010-01-01

Full Text Available La estreptococosis es uno de los problemas sanitarios más serios en la acuicultura mundial. En Colombia la enfermedad afecta de manera importante las explotaciones de tilapia. se estandarizó la técnica de hibridación in situ (HIS en tejidos de tilapia previamente identificados como positivos a la presencia de S. agalactiae por la técnica de inmunoperoxidasa indirecta (IPI y microbiología. Se obtuvo señal positiva en el interior de los granulomas con una especificidad del 100%. Se logró amplificar significativamente la señal mediante el uso de la tiramida. La HIS en tejidos de tilapia puede ser usada para el diagnóstico y estudios de patogenésis y epidemiológicos con este microorganismo. Se requieren futuras investigaciones para optimizar la marcación de las bacterias libres en los tejidos y evaluar la sensibilidad de la técnica.

Bilhemia: a fatal complication following percutaneous placement of a transhepatic inferior vena cava catheter in a child

International Nuclear Information System (INIS)

Sierre, Sergio; Lipsich, Jose; Questa, Horacio

2007-01-01

A transhepatic central venous catheter was implanted in a 2-year-old child with a history of multiple venous access procedures and superior and inferior vena cava thrombosis. After 2 weeks, inadvertent dislodgement of the catheter was complicated by a biloma. The biloma was percutaneously drained, but a biliary-venous fistula led to a rapidly progressive and fatal bilhemia. We report this case as an infrequent complication of transhepatic catheterization. (orig.)

Fracture and embolization of a Celect inferior vena cava filter strut to the liver: A Case Report

Energy Technology Data Exchange (ETDEWEB)

Kim, So Hee; Song, Yun Gyu [Dept. of Radiology, Samsung Changwon Hospital, Sungkyunkwan University School of Medicine, Changwon (Korea, Republic of)

2017-07-15

Inferior vena cava (IVC) filters are typically used for prophylaxis against pulmonary embolism. A new version of the Günther Tulip filter, the Celect IVC filter was introduced in April 2007. To the best of our knowledge, there are no reports commenting on Celect IVC filter fracture and fragment embolization to liver. We report a case in which the strut of the Celect IVC filter embolized to the liver.

Percutaneous closure of patent ductus arteriosus via internal jugular vein in patient with interrupted inferior vena cava

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Patel Nehal

2009-01-01

Full Text Available Transcatheter closure of patent ductus arteriosus (PDA using various occluders and coils via femoral vein is a well established therapeutic option. However, in patients with interrupted inferior vena cava (IVC it is not feasible to close the PDA percutaneously using traditional methods. We present a nine-year-old girl with IVC interruption in whom percutaneous closure of PDA was successfully accomplished via the transjugular approach.

Fracture and embolization of a Celect inferior vena cava filter strut to the liver: A Case Report

International Nuclear Information System (INIS)

Kim, So Hee; Song, Yun Gyu

2017-01-01

Inferior vena cava (IVC) filters are typically used for prophylaxis against pulmonary embolism. A new version of the Günther Tulip filter, the Celect IVC filter was introduced in April 2007. To the best of our knowledge, there are no reports commenting on Celect IVC filter fracture and fragment embolization to liver. We report a case in which the strut of the Celect IVC filter embolized to the liver

Condiciones necesarias para el funcionamiento del proceso de filtración o escalamiento

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Currie Lauchlin

1993-12-01

Full Text Available Procurar vivienda para l apoblación de menores recursos es uno de los problemas cruciales de la economías en desarrollo. En ellas el crecimiento urbano ha sido asociado con la expansión de los cinturones de miseria y los altos precios de la tierra urbana. Estos peligros se pueden evitar mediante el logro de los efectos de la filtración o escalamiento, tendientes a que las familias de menores ingresos puedan acceder a vivienda usada. Aqui se conjuga la mano invisible con la política planificada del Estado y, además, lo micro con lo macro. Ddo el alto costo de la tierra urbana y los exagerados costos de transporte, una planificación donde se fomente la construcción "hacia arriba", apoyada en el diseño de viviendas multifamiliares y de un espacio urbano donde los sitios de vivienda y actividad laboral o cultural no estén distantes, permite el logro de sustanciales economías para la población de bajos recursos de los países en desarrollo.

Prácticas basadas en evidencias para la transición de feto a recién nacido

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Judith S. MERCER

2010-12-01

Full Text Available Muchas prácticas comunes de atención en el parto, nacimiento, y en el período inmediato al post-parto tienen impacto en la transición de feto a recién nascido, incluyendo la medicación usada durante el parto, protocolos de aspiración, estrategias para prevenir la caída brusca de temperatura, ligadura del cordón umbilical, y el uso de oxigeno 100% para la reanimación. Muchas de las prácticas de atención usadas para evaluar y manosear un recién nacido inmediatamente después del nacimiento no tienen eficacia comprobada. No se alcanzaron resultados definitivos a partir de estudios sobre los efectos de la analgesia materna en el recién nacido. A pesar de que la ligadura inmediata del cordón umbilical es una práctica común, evidencias recientes mostradas por ensayos ampliamente controlados y randomizados sugieren que la ligadura tardía del cordón umbilical protege al bebe contra anemia. El contacto piel a piel del recién nacido después del nacimiento se recomienda como base de la termorregulación y cuidado al recién nacido. No fue probado que la aspiración rutinera de los bebés al nacer sea benéfica. Ni tampoco la amnioinfusión, la aspiración de bebés que aspiraran meconio después de la salida de la cabeza, o la aspiración e intubación de bebés saludables como prevención del síndrome de aspiración de meconio. El uso de oxigeno 100% al nacer para reanimar un recién nacido causa aumento de stres oxidativo y no parece ofrecer beneficios en relación al aire ambiental. Esta revisión de las evidencias a respecto de las prácticas de atención al recién nacido muestra que, en la mayoría de los casos, una menor intervención acaba siendo mejor. Las recomendaciones apoyan un nacimiento suave y fisiológico, y una atención del recién nacido centrado en la familia.

Radiotherapeutic handling in the compression syndrome of the superior vena cava

International Nuclear Information System (INIS)

Ferreira, P.R.F.; Barletta, A.

1989-01-01

Superior vena cava syndrome is an uncommon emergency occuring in bronchogenic carcionoma and lymphomas, and it is even less frequent in benign diseases. It requires rapid and effective treatment. Dramatic regression can be seen in a few days. This serie analyses clinical characteristics in 29 patients treated in our Department between 1981 and 1986. Four cases were excluded in the study of response. The total dose was around 6000 cGy/6 weeks given in high or standard daily initial doses. Responses were very satisfactory. Some patients were given chemotherapy before or during the radiation course and the results were compared to radiation alone. There was no advantage in combined therapy. Chemotherapy is viewed in the literature as the main choice when oat-cell carcinoma or lymphoma is the underlying disease. (author) [pt

Primary Pulmonary Ewing's Sarcoma: Rare Cause of Superior Vena Cava Syndrome in Children.

Science.gov (United States)

Mehra, Shibani; Atwal, Swapndeep Singh; Garga, Umesh Chandra

2014-08-01

Ewing's sarcoma is a common malignant bone tumour presenting in children and young adults. Rarely extra- skeletal soft tissues and visceral organs can also be the site of origin of Ewing's sarcoma. Primary pulmonary Ewing's sarcoma is an extremely rare malignancy which occurs in the paediatric population. We report an unusual case of primary pulmonary Ewing's sarcoma in a nine year old girl who presented with features of superior vena cava syndrome in the emergency department. The diagnosis was confirmed pathologically both by light microscopy and immunohistochemistry. The patient was put on chemotherapy and surgery was planned but the patient expired within three days of starting chemotherapy.

Biossegurança e a enfermagem nos cuidados clínicos: contribuições para a saúde do trabalhador Biosecuridad y la enfermería en la atención clínica: contribuciones para promoción de la salud del trabajador Biosecurity and clinical care nursing: contributions for the promotion of worker's health

OpenAIRE

Samanta Rauber Gallas; Rosane Teresinha Fontana

2010-01-01

Estudo qualitativo que teve como objetivo investigar concepções e práticas de técnicos em enfermagem acerca da biossegurança e sua interface com os riscos biológicos, desenvolvido com vinte trabalhadores de uma unidade de cuidado clínico, de um hospital do interior do Rio Grande do Sul. Os dados foram coletados mediante entrevistas e observação sistemática. A análise temática foi a metodologia usada para o tratamento dos dados. A negligência dos trabalhadores quanto ao uso de Equipamentos de ...

Endovascular Treatment of Malignant Superior Vena Cava Syndrome: Results and Predictive Factors of Clinical Efficacy

Energy Technology Data Exchange (ETDEWEB)

Fagedet, Dorothee, E-mail: DFagedet@chu-grenoble.fr [CHU de Grenoble, Clinique universitaire de medecine interne, Pole Pluridisciplinaire de Medecine (France); Thony, Frederic, E-mail: FThony@chu-grenoble.fr [CHU de Grenoble, Clinique universitaire de radiologie et imagerie medicale, Pole d' Imagerie (France); Timsit, Jean-Francois, E-mail: JFTimsit@chu-grenoble.fr [CHU de Grenoble, Clinique universitaire de reanimation, Pole Medecine Aiguee Communautaire (France); Rodiere, Mathieu, E-mail: MRodiere@chu-grenoble.fr [CHU de Grenoble, Clinique universitaire de radiologie et imagerie medicale, Pole d' Imagerie (France); Monnin-Bares, Valerie, E-mail: v-monnin@chu-montpellier.fr [CHRU Arnaud de Villeneuve, Imagerie Medicale Thoracique Cardiovasculaire (France); Ferretti, Gilbert R., E-mail: GFerretti@chu-grenoble.fr [CHU de Grenoble, Clinique universitaire de radiologie et imagerie medicale, Pole d' Imagerie (France); Vesin, Aurelien; Moro-Sibilot, Denis, E-mail: DMoro.pneumo@chu-grenoble.fr [University Grenoble 1 e Albert Bonniot Institute, Inserm U823 (France)

2013-02-15

To demonstrate the effectiveness of endovascular treatment (EVT) with self-expandable bare stents for malignant superior vena cava syndrome (SVCS) and to analyze predictive factors of EVT efficacy. Retrospective review of the 164 patients with malignant SVCS treated with EVT in our hospital from August 1992 to December 2007 and followed until February 2009. Endovascular treatment includes angioplasty before and after stent placement. We used self-expandable bare stents. We studied results of this treatment and looked for predictive factors of clinical efficacy, recurrence, and complications by statistical analysis. Endovascular treatment was clinically successful in 95% of cases, with an acceptable rate of early mortality (2.4%). Thrombosis of the superior vena cava was the only independent factor for EVT failure. The use of stents over 16 mm in diameter was a predictive factor for complications (P = 0.008). Twenty-one complications (12.8%) occurred during the follow-up period. Relapse occurred in 36 patients (21.9%), with effective restenting in 75% of cases. Recurrence of SVCS was significantly increased in cases of occlusion (P = 0.01), initial associated thrombosis (P = 0.006), or use of steel stents (P = 0.004). Long-term anticoagulant therapy did not influence the risk of recurrence or complications. In malignancy, EVT with self-expandable bare stents is an effective SVCS therapy. These results prompt us to propose treatment with stents earlier in the clinical course of patients with SVCS and to avoid dilatation greater than 16 mm.

Endovascular Treatment of Malignant Superior Vena Cava Syndrome: Results and Predictive Factors of Clinical Efficacy

International Nuclear Information System (INIS)

Fagedet, Dorothée; Thony, Frederic; Timsit, Jean-François; Rodiere, Mathieu; Monnin-Bares, Valérie; Ferretti, Gilbert R.; Vesin, Aurélien; Moro-Sibilot, Denis

2013-01-01

To demonstrate the effectiveness of endovascular treatment (EVT) with self-expandable bare stents for malignant superior vena cava syndrome (SVCS) and to analyze predictive factors of EVT efficacy. Retrospective review of the 164 patients with malignant SVCS treated with EVT in our hospital from August 1992 to December 2007 and followed until February 2009. Endovascular treatment includes angioplasty before and after stent placement. We used self-expandable bare stents. We studied results of this treatment and looked for predictive factors of clinical efficacy, recurrence, and complications by statistical analysis. Endovascular treatment was clinically successful in 95% of cases, with an acceptable rate of early mortality (2.4%). Thrombosis of the superior vena cava was the only independent factor for EVT failure. The use of stents over 16 mm in diameter was a predictive factor for complications (P = 0.008). Twenty-one complications (12.8%) occurred during the follow-up period. Relapse occurred in 36 patients (21.9%), with effective restenting in 75% of cases. Recurrence of SVCS was significantly increased in cases of occlusion (P = 0.01), initial associated thrombosis (P = 0.006), or use of steel stents (P = 0.004). Long-term anticoagulant therapy did not influence the risk of recurrence or complications. In malignancy, EVT with self-expandable bare stents is an effective SVCS therapy. These results prompt us to propose treatment with stents earlier in the clinical course of patients with SVCS and to avoid dilatation greater than 16 mm.

Pseudo interruption of the inferior vena cava complicating the device closure of patent ductus arteriosus: Case report and short review of venous system embryology

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Venkateshwaran Subramanian

2014-01-01

Full Text Available A nineteen-month-old girl was taken up for patent ductus arteriosus (PDA device closure. A diagnostic catheter from the right femoral venous access entered the superior vena cava (SVC, through the azygos vein suggesting interruption of inferior vena caval with azygos continuity. Therefore, the PDA device was closed from the right jugular venous access. However, a postprocedure echocardiogram (echo showed a patent inferior vena caval connection into the right atrium. An angiogram from femoral veins showed communication between the iliac veins and the azygos system, in addition to normal drainage into the inferior vena cava (IVC. Congenital communication between the iliac veins and the azygos system can mimic IVC interruption. An attempt to theoretically explain the embryological origin of the communication has been made.

BrAgriNews: Um Corpus Temporal-Causal (Português-Brasileiro para a Agricultura

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Brett Drury

2017-07-01

Full Text Available Recentemente tem havido um aumento no interesse, tanto no meio acadêmico quanto na indústria, em aplicações de aprendizagem de máquina e técnicas de inteligência artificial relacionadas com problemas agrícolas. Mineração de texto e técnicas relacionadas com o processamento da língua natural, raramente foram usadas para resolver problemas agrícolas, e muito menos para a língua portuguesa. É possível que um dos fatores que influenciam a escassez no uso técnicas de mineração de texto, para analisar textos em português e resolver problemas agrícolas, pode ser devido à falta de um corpus anotado livremente disponível. Para colmatar a falta de um corpus agrícola em língua portuguesa, estamos liberando um recurso em português-brasileiro voltado para agricultura, descrito neste artigo. O corpus abrange um período parcialmente contínuo de tempo entre 1996 e 2016, consistindo de notícias em português-brasileiro que foram anotadas com o seguinte tipo de informação: causal, sentimento, entidades nomeadas que incluem expressões temporais. O corpus tem recursos adicionais como: treebank, listas de termos frequentes (sem stop-words: unigramas, bigramas e trigramas, bem como palavras ou frases que foram identificados por jornalistas como de domínio específico. Espera-se que a liberação do corpus estimule a adoção da mineração de texto na agricultura na comunidade de pesquisa lusófona.

Cytotoxic activity of proteins isolated from extracts of Corydalis cava tubers in human cervical carcinoma HeLa cells

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Balcerkiewicz Stanislaw

2010-12-01

Full Text Available Abstract Background Corydalis cava Schweigg. & Koerte, the plant of numerous pharmacological activities, together with the studied earlier by our group Chelidonium majus L. (Greater Celandine, belong to the family Papaveraceae. The plant grows in Central and South Europe and produces the sizeable subterraneous tubers, empty inside, which are extremely resistant to various pathogen attacks. The Corydalis sp. tubers are a rich source of many biologically active substances, with the extensive use in European and Asian folk medicine. They have analgetic, sedating, narcotic, anti-inflammatory, anti-allergic and anti-tumour activities. On the other hand, there is no information about possible biological activities of proteins contained in Corydalis cava tubers. Methods Nucleolytic proteins were isolated from the tubers of C. cava by separation on a heparin column and tested for DNase activity. Protein fractions showing nucleolytic activity were tested for cytotoxic activity in human cervical carcinoma HeLa cells. Cultures of HeLa cells were conducted in the presence of three protein concentrations: 42, 83 and 167 ng/ml during 48 h. Viability of cell cultures was appraised using XTT colorimetric test. Protein fractions were separated and protein bands were excised and sent for identification by mass spectrometry (LC-ESI-MS/MS. Results The studied protein fractions showed an inhibiting effect on mitochondrial activity of HeLa cells, depending on the administered dose of proteins. The most pronounced effect was obtained with the highest concentration of the protein (167 ng/ml - 43.45 ± 3% mitochondrial activity of HeLa cells were inhibited. Mass spectrometry results for the proteins of applied fractions showed that they contained plant defense- and pathogenesis-related (PR proteins. Conclusions The cytotoxic effect of studied proteins toward HeLa cell line cells has been evident and dependent on increasing dose of the protein. The present study, most

Estudo da resposta tissular à endoprótese recoberta de jugular bovina em veia cava inferior de suínos Bovine jugular covered stent-graft implanted in swine inferior vena cava - a study of tissue response

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Cristina Ribeiro Riguetti Pinto

2006-06-01

Full Text Available OBJETIVO: Avaliar a resposta tissular a uma endoprótese, com cobertura biológica heteróloga, implantada em veia cava inferior de suínos. MÉTODO: Desenvolvemos uma endoprótese auto-expansível, revestida com um segmento de jugular bovina, conservada por processo L-hydro e suturada em um stent de aço inoxidável 316L. O dispositivo introdutor utilizado foi a bainha de liberação da endoprótese aórtica Taheri-Leonhardt (Flórida, EUA. Foram implantadas endopróteses em 10 suínos, todas na veia cava infra-renal. Os animais foram submetidos à flebografia peroperatória. À necropsia, após 2 meses, cada endoprótese foi retirada em bloco e analisada macroscopicamente, visando a avaliação da perviedade, aderência aos tecidos vizinhos e incorporação à parede venosa; e, histopatologicamente, visando a resposta histológica ao enxerto. RESULTADOS: Na análise macroscópica, todas as endopróteses encontravam-se pérvias e totalmente incorporadas à parede venosa, porém seis apresentavam trabeculações grosseiras no seu interior e quatro algum grau de fibrose perivascular. Três animais desenvolveram linfocele, uma retroperitoneal e as outras na parede abdominal. No estudo histopatológico, observamos reação inflamatória granulomatosa tipo corpo estranho em todos os casos, sendo predominante na camada média (80%. CONCLUSÃO: O modelo estudado apresentou baixa trombogenicidade, corroborando com a eficácia do meio de conservação e material escolhidos; porém, baixa biocompatibilidade, provavelmente pelo obstáculo imunológico dos xenoenxertos e resposta tissular exagerada do território venoso.OBJECTIVE: To evaluate tissue response to a bovine jugular vein covered stent when implanted in the swine inferior vena cava. METHOD: We developed a self-expanding stent, using a segment of L-hydro conserved bovine jugular vein, which was trimmed and sutured to a 316L stainless steel stent. We used the Taheri-Leonhardt delivery system for

Fatores de risco para poliparasitismo intestinal em uma comunidade indígena de Pernambuco, Brasil

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Fontbonne Annick

2001-01-01

Full Text Available No perfil etnoepidemiológico da comunidade dos Índios Pankararus - interior do Estado de Pernambuco -, as parasitoses intestinais representam importante problema de saúde pública, por atingir a quase totalidade da população. A fim de conhecer possíveis fatores de risco ambientais deste quadro, utilizou-se parte da base de dados do inquérito original para relacionar as condições de moradia ao número de parasitas diferentes verificado entre seus moradores. Com base na seleção da quantidade de exames coprológicos efetuados entre as pessoas da família, a amostra para análise contou 84 famílias dentre as 112 da amostra aleatória original. Para o número médio de 6,1 pessoas por família, constatou-se que o de parasitas diferentes presentes no lar era 5,0, número crescente quando a casa era de taipa (6,0 contra 4,9 para as de alvenaria; p < 0,03, ou a água usada na moradia não era tratada (5,1 contra 4,5 para água tratada; p < 0,05. Outros fatores que caracterizam a moradia e sua higiene não parecem influenciar o número médio de parasitas na casa. Conclui-se que o poliparasitismo nos Índios Pankararus de Pernambuco chega a representar a regra e está referido sobretudo às fontes de água de beber e ao seu tratamento.

Fatores de risco para poliparasitismo intestinal em uma comunidade indígena de Pernambuco, Brasil

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Annick Fontbonne

2001-03-01

Full Text Available No perfil etnoepidemiológico da comunidade dos Índios Pankararus - interior do Estado de Pernambuco -, as parasitoses intestinais representam importante problema de saúde pública, por atingir a quase totalidade da população. A fim de conhecer possíveis fatores de risco ambientais deste quadro, utilizou-se parte da base de dados do inquérito original para relacionar as condições de moradia ao número de parasitas diferentes verificado entre seus moradores. Com base na seleção da quantidade de exames coprológicos efetuados entre as pessoas da família, a amostra para análise contou 84 famílias dentre as 112 da amostra aleatória original. Para o número médio de 6,1 pessoas por família, constatou-se que o de parasitas diferentes presentes no lar era 5,0, número crescente quando a casa era de taipa (6,0 contra 4,9 para as de alvenaria; p < 0,03, ou a água usada na moradia não era tratada (5,1 contra 4,5 para água tratada; p < 0,05. Outros fatores que caracterizam a moradia e sua higiene não parecem influenciar o número médio de parasitas na casa. Conclui-se que o poliparasitismo nos Índios Pankararus de Pernambuco chega a representar a regra e está referido sobretudo às fontes de água de beber e ao seu tratamento.

Gianturco expandable wire stents for treatment of superior vena cava syndrome secondary to lung carcinoma

International Nuclear Information System (INIS)

Rosch, J.; Bedell, J.; Putnam, J.; Antonovic, R.; Uchida, B.

1986-01-01

Two patients with superior vena cava syndrome (SVCS) secondary to lung carcinoma which recurred after maximum-dose radiation therapy were treated with placement of modified Gianturco expandable wire stents constructed in the authors' research laboratory. Symptoms of SVCS disappeared in 24 hours after stent placement, and the patients remained asymptomatic to their last follow-up, 2 1/2 months after the procedure (to the submission of this abstract). Both stents were widely patent at that time on superior vena cavograms and draining well the head, neck, and upper extremity circulation to the right atrium

Superior vena cava syndrome associated with right-to left shunt through systemic-to-pulmonary venous collaterals

International Nuclear Information System (INIS)

Juan, Yu Hsiang; Saboo, Sachin S.; Anand, Vishal; Chatzizisis, Yiannis S.; Steigner, Michael L.; Lin, Yu Ching

2014-01-01

Superior vena cava (SVC) obstruction is associated with the gradual development of venous collaterals. We present a rare form of systemic-to-pulmonary subpleural collateral pathway that developed in the bridging subpleural pulmonary veins in a 54-year-old woman with complete SVC obstruction. This uncommon collateral pathway represents a rare form of acquired right-to-left shunt due to previous pleural adhesions with an increased risk of stroke due to right-to-left venous shunting, which requires lifelong anticoagulation.

Persistent left superior vena cava: a case report and review of literature

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Verma Gita

2008-10-01

Full Text Available Abstract Persistent left superior vena cava is rare but important congenital vascular anomaly. It results when the left superior cardinal vein caudal to the innominate vein fails to regress. It is most commonly observed in isolation but can be associated with other cardiovascular abnormalities including atrial septal defect, bicuspid aortic valve, coarctation of aorta, coronary sinus ostial atresia, and cor triatriatum. The presence of PLSVC can render access to the right side of heart challenging via the left subclavian approach, which is a common site of access utilized when placing pacemakers and Swan-Ganz catheters. Incidental notation of a dilated coronary sinus on echocardiography should raise the suspicion of PLSVC. The diagnosis should be confirmed by saline contrast echocardiography.

Modelo climático para previsão do míldio da cebola

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Leandro Luiz Marcuzzo

2016-03-01

Full Text Available RESUMO A partir de dados publicados na literatura, elaborou-se um modelo de previsão do míldio da cebola, causado por Peronospora destructor. O modelo desenvolvido baseia-se nas condições climáticas favoráveis para o processo infeccioso, baseado na temperatura e na duração do molhamento foliar. Obteve-se a interação que representa os dois fatores sobre a probabilidade de infecção. Com auxílio da planilha eletrônica Excell, calculou-se a duração do período de molhamento foliar para obter diferentes probabilidades de infecção do patógenos em diferentes temperaturas. Com os dados foi elaborada uma tabela que poderá ser usada na programação computacional que registra a duração do período de molhamento foliar e a temperatura média e automaticamente o valor diário de probabilidade de ocorrência de infecção. O modelo será validado em experimentos conduzidos no campo e com infecção natural, em Rio do Sul, SC.

Contrast-enhanced fluorodeoxyglucose positron emission tomography/contrast-enhanced computed tomography in mediastinal T-cell lymphoma with superior vena cava syndrome

International Nuclear Information System (INIS)

Santhosh, Sampath; Gorla, Arun Kumar Reddy; Bhattacharya, Anish; Varma, Subhash Chander; Mittal, Bhagwant Rai

2016-01-01

Positron emission tomography-computed tomography (PET/CT) is a routine investigation for the staging of lymphomas. Contrast-enhanced computed tomography is mandatory whenever parenchymal lesions, especially in the liver and spleen are suspected. We report a rare case of primary mediastinal T-cell lymphoma evaluated with contrast-enhanced PET/CT that showed features of superior vena cava syndrome

Retrievable Inferior Vena Cava Filters: Indications, Indwelling Time, Removal, Success and Complication Rates.

Science.gov (United States)

Tashbayev, Alisher; Belenky, Alexander; Litvin, Sergey; Knizhnik, Michael; Bachar, Gil N; Atar, Eli

2016-02-01

Various vena cava filters (VCF) are designed with the ability to be retrieved percutaneously. Yet, despite this option most of them remain in the inferior vena cava (IVC). To report our experience in the placement and retrieval of three different types of VCFs, and to compare the indications for their insertion and retrieval as reported in the literature. During a 5 year period three types of retrievable VCF (ALN, OptEase, and Celect) were inserted in 306 patients at the Rabin Medical Center (Beilinson and Hasharon hospitals). Indications, retrieval rates, median time to retrieval, success and complication rates were viewed and assessed in the three groups of filter types and were compared with the data of similar studies in the literature. Of the 306 VCFs inserted, 31 (10.1%) were retrieved with equal distribution in the three groups. In most patients the reason for filter insertion was venous thromboembolic events (VTE) and contraindications to anticoagulant therapy. Mean age was 68.38 ± 17.5 years (range 18-99) and was noted to be significantly higher compared to similar studies (53-56 years) (P < 0.0001). Multi-trauma patients were significantly older (71.11 ± 14.99 years) than post-pulmonary embolism patients (48.03 ± 20.98 years, P < 0.0001) and patients with preventive indication (26.00 ± 11.31, P < 0.0001). The mean indwelling time was 100.6 ± 103.399 days. Our results are comparable with the results of other studies, and there was no difference in percentage of retrieval or complications between patients in each of the three groups. In 1 of 10 patients filters should be removed after an average of 3.5 months. All three IVC filter types used are safe to insert and retrieve.

Long-Term Safety and Effectiveness of the “OptEase” Vena Cava Filter

International Nuclear Information System (INIS)

Kalva, Sanjeeva P.; Marentis, Theodore C.; Yeddula, Kalpana; Somarouthu, Bhanusupriya; Wicky, Stephan; Stecker, Michael S.

2011-01-01

Purpose: To assess the long-term safety and effectiveness of the OptEase inferior vena cava (IVC) filter. Materials and Methods: In this Institutional Review Board-approved, retrospective study, we reviewed data of 71 patients who received an OptEase filter at our institution from 2002 to 2007. Thirty-nine (55%) patients had symptoms of venous thromboembolism before filter placement. The indications for filter included contraindication to anticoagulation in 31 (44%) patients, prophylaxis against pulmonary embolism (PE) in 29 (41%) patients, and failure of anticoagulation in 11 (15%) patients. Procedure-related complications, such as symptomatic post-filter PE, deep venous thrombosis (DVT), IVC occlusion, and incidental imaging-evident filter-related complications, were recorded. Safety was assessed by the occurrence of filter-related complications during placement and follow-up. Effectiveness was assessed by the occurrence of post-filter PE. Results: Sixty-five (92%) filters were placed under fluoroscopy, and 6 (8%) were placed using intravascular ultrasound guidance. Seventy (99%) filters were placed successfully. Seven (10%) filters were placed in the suprarenal cava. Retrieval was attempted in 14 (20%) patients, and 12 filters were successfully retrieved. Clinical follow-up was available for 20 ± 21 months. Symptoms of postfilter PE and DVT occurred in 15% (n = 11) and 10% (n = 7) patients, respectively. None of these patients had computed tomography (CT)-proven PE, and only one had ultrasound-proven new DVT. One patient had symptomatic IVC occlusion. Follow-up abdominal CT in 20 patients showed thrombus in the filter in two of them. There were no instances of filter migration, filter tilt, or caval wall penetration. Conclusion: The OptEase filter appears to have an acceptable long-term safety profile. The filter was effective against PE.

Estudos para Composição de uma Dieta Referência Semipurificada para Avaliação de Exigências Nutricionais em Juvenis de Pirapitinga, Piaractus brachypomus (Cuvier, 1818

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Vásquez-Torres Wálter

2002-01-01

Full Text Available Foram realizados dois experimentos com o objetivo de definir uma dieta referência para estudos de exigências nutricionais em Piaractus brachypomus. No primeiro experimento, foram testadas quatro dietas com ingredientes semipurificados (H-440 com 47% PB, C-102 com 41% PB, NRC com 37% PB e IALL-1 com 32% de PB e uma dieta controle (32% de PB com ingredientes comuns. No segundo experimento, foi usada a dieta IALL-1, como base para a formulação de três dietas experimentais. A dieta 2 foi suplementada com vitamina C e uma pré-mistura de macrominerais, enquanto na dieta 3 o óleo vegetal foi substituído por óleo de peixe. O ganho de peso foi usado como critério básico para medir os efeitos das dietas, sendo também considerados consumo de alimento, taxa específica de crescimento (SGR, conversão alimentar aparente (FCR, eficiência de utilização da proteína (PER e retenção de proteína (%PPV e de energia (%RE. Entre as dietas semipurificadas, o melhor desempenho de crescimento e de utilização dos nutrientes foi observado para as dietas NRC e IALL-1, que não diferiram entre si. No segundo experimento, o grupo de peixes alimentados com a dieta 2 apresentou crescimento 42% maior que o observado com as dietas sem suplementação. As outras variáveis analisadas, FCR, SGR, PER e %PPV, também foram significativamente melhoradas. Os resultados em conjunto indicam que a dieta IALL-1 suplementada com macrominerais e vitamina C pode ser considerada adequada como dieta referência semipurificada para estudos de nutrição de Piaractus brachypomus.

Should We Remove the Retrievable Cook Celect Inferior Vena Cava Filter? Eight Years of Experience at a Single Center.

Science.gov (United States)

Son, Joohyung; Bae, Miju; Chung, Sung Woon; Lee, Chung Won; Huh, Up; Song, Seunghwan

2017-12-01

The inferior vena cava filter (IVCF) is very effective for preventing pulmonary embolism in patients who cannot undergo anticoagulation therapy. However, if a filter is placed in the body permanently, it may lead to other complications. A retrospective study was performed of 159 patients who underwent retrievable Cook Celect IVCF implantation between January 2007 and April 2015 at a single center. Baseline characteristics, indications, and complications caused by the filter were investigated. The most common underlying disease of patients receiving the filter was cancer (24.3%). Venous thrombolysis or thrombectomy was the most common indication for IVCF insertion in this study (47.2%). The most common complication was inferior vena cava penetration, the risk of which increased the longer the filter remained in the body (p=0.032, Exp(B)=1.004). If the patient is able to retry anticoagulation therapy and the filter is no longer needed, the filter should be removed, even if a long time has elapsed since implantation. If the filter cannot be removed, it is recommended that follow-up computed tomography be performed regularly to monitor the progress of venous thromboembolisms as well as any filter-related complications.

Indications, management, and complications of temporary inferior vena cava filters

International Nuclear Information System (INIS)

Linsenmaier, Ulrich; Rieger, Johannes; Schenk, Franz; Rock, Clemens; Mangel, Eugen; Pfeifer, Klaus Juergen

1998-01-01

Purpose: We describe the results of a preliminary prospective study using different recently developed temporary and retrievable inferior vena cava (IVC) filters.Methods: Fifty temporary IVC filters (Guenther, Guenther Tulip, Antheor) were inserted in 47 patients when the required period of protection against pulmonary embolism (PE) was estimated to be less than 2 weeks. The indications were documented deep vein thrombosis (DVT) and temporary contraindications for anticoagulation, a high risk for PE, and PE despite DVT prophylaxis.Results: Filters were removed 1-12 days after placement and nine (18%) had captured thrombi. Complications were one PE during and after removal of a filter, two minor filter migrations, and one IVC thrombosis.Conclusion: Temporary filters are effective in trapping clots and protecting against PE, and the complication rate does not exceed that of permanent filters. They are an alternative when protection from PE is required temporarily, and should be considered in patients with a normal life expectancy.

Reflexiones sobre una estrategia metodológica para el análisis de las protestas sociales

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Scribano Adrian

2003-01-01

Full Text Available ¿Cómo identificar, entender y explicar el sentido de las acciones colectivas? Es tal vez hoy una de las preguntas más desafiantes y conflictivas para la Teoría Social en general y la Metodología de las Ciencias Sociales en particular. Desde una perspectiva teórica son diversos los caminos disponibles para interpretar las acciones colectivas y muchas de ellas implican la opción de una específica estrategia metodológica. En esta dirección, al intentar construir un diseño de investigación para el análisis empírico de las protestas sociales se hace evidente, de forma inmediata, algunas de las dificultades básicas de la producción de conocimiento en ciencias sociales. Una de las facetas del desafío aludido la constituye la necesidad de disponer de una articulación critica entre supuestos teóricos, epistémicos y metodológicos. Este trabajo tiene por objetivo mostrar y discutir una de las estrategias usada para investigar "Cortes de Ruta" en la Argentina en tanto forma particular de protesta social explicitando sus supuestos. Para lograr el objetivo planteado se ha seleccionado la siguiente camino argumentativo: a sintetizar los supuestos epistémicos básicos del abordaje utilizado; b reseñar el instrumental teórico construido; c describir las técnicas de obtención de información y d reflexionar respecto a las dificultades encontradas y a las potencialidades detectadas.

Palmeras usadas por los indígenas Asháninkas en la Amazonía Peruana

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Joanna Sosnowska

2011-05-01

Full Text Available El presente artículo muestra el conocimiento e importancia de las palmeras en la vida de los nativos Asháninkas. Presentamos una descripción cualitativa y cuantitativa de 32 entrevistas, obtenidos durante la visita a siete comunidades nativas ubicadas en los márgenes de los ríos Perené y Tambo en el departamento Junín, Perú. Registramos 15 especies de palmeras usadas por los Asháninkas, agrupadas bajo cinco categorías de uso: alimenticio, construcción, herramienta, ornamental y medicinal. Las especies con usos más amplios son: Attalea phalerata, Bactris gasipaes, Oenocarpus bataua y Socratea exorhiza. Las partes de las palmeras más utilizadas son los frutos, principalmente gracias a su valor comestible. La cercanía de las comunidades Asháninkas del valle del Perené a ciudades, influirían en un cambio en el tipo de vida tradicional, donde las palmeras son los más importantes recursos naturales utilizados por ellos. Sin embargo, en las comunidades del valle Tambo la vida tradicional, el conocimiento y practica en el uso de las palmeras esta aún vital

Plantas medicinais usadas para a saúde bucal pela comunidade do bairro Santa Cruz, Chapada dos Guimarães, MT, Brasil Medicinal plants used for oral health in the Santa Cruz neighborhood, Chapada dos Guimarães, Mato Grosso State, Brazil

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Aneliza Meireles Borba

2006-12-01

Full Text Available Em Mato Grosso, populações tradicionais recorrem ao uso de espécies vegetais como alternativa terapêutica. Na cidade de Chapada dos Guimarães, o bairro Santa Cruz se destaca por abrigar famílias nascidas em áreas urbanas ou rurais que conservam esses conhecimentos transmitidos por gerações. Esta pesquisa tem como objetivo o levantamento das plantas medicinais utilizadas pela comunidade local, indicações terapêuticas, preparos e modos de uso visando a manutenção e recuperação da saúde bucal. Foram entrevistados 40 residentes, através de abordagem qualitativa, usando entrevista semi-estruturada. As espécies catalogadas foram depositadas para identificação no UFMT/Herbário Central. Foram citadas 87 espécies pertencentes a 48 famílias utilizadas na saúde bucal, encontradas no bioma Cerrado ou cultivadas nas residências. Conforme as afecções bucais citadas, as espécies utilizadas são: para erupção dentária: camomila (Matricaria chamomilla L.; candidíases, estomatites, gengivites e afta: açafrão (Crocus sativus L.; dor de dente: arnica-da-serra (Brickelia brasiliensis (Spreng. Robinson. A folha foi a parte da planta mais usada e o chá, por decocção, modo de preparo mais comum. Pessoas idosas, líderes comunitários, parteiras e benzedeiras entrevistados apresentaram um maior conhecimento sobre o assunto. Constatou-se que a comunidade utiliza espécies vegetais, nativas do cerrado ou exóticas, com finalidade terapêutica para manutenção e recuperação da saúde bucal, sendo uma alternativa tradicional, econômica e atuante.In the State of Mato Grosso, traditional populations turn to the use of many plant species as a therapeutic alternative. In the city of Chapada dos Guimarães, the Santa Cruz neighborhood is well known for harboring families from urban and rural communities who preserve this knowledge passed down through many generations. The objective of this research was to survey the medicinal plants used

Superior vena cava syndrome after pulsatile bidirectional Glenn shunt procedure: Perioperative implications

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Neema Praveen

2009-01-01

Full Text Available Bidirectional superior cavopulmonary shunt (bidirectional Glenn shunt is generally performed in many congenital cardiac anomalies where complete two ventricle circulations cannot be easily achieved. The advantages of BDG shunt are achieved by partially separating the pulmonary and systemic venous circuits, and include reduced ventricular preload and long-term preservation of myocardium. The benefits of additional pulsatile pulmonary blood flow include the potential growth of pulmonary arteries, possible improvement in arterial oxygen saturation, and possible prevention of development of pulmonary arteriovenous malformations. However, increase in the systemic venous pressure after BDG with additional pulsatile blood flow is known. We describe the peri-operative implications of severe flow reversal in the superior vena cava after pulsatile BDG shunt construction in a child who presented for surgical interruption of the main pulmonary artery.

Estrutura, ultraestrutura e morfometria da veia cava de paca (Cuniculus paca Linnaeus, 1766) criada em cativeiro

OpenAIRE

Sérgio Pinter Garcia Filho; Leandro Luís Martins; Ana Carolina Gonçalves dos Reis; Maria Rita Pacheco; Márcia Rita Fernandes Machado

2013-01-01

A paca (Cuniculus paca) é o segundo maior roedor da fauna brasileira. Apresenta carne de excelente qualidade, o que incentiva a criação comercial. Além disso, este animal pode tornar-se uma opção válida em experimentação embora poucas sejam as informações detalhadas sobre sua morfologia. Assim, objetivou-se descrever a morfologia, morfometria e ultraestrutura de segmentos das porções cranial e caudal da veia cava de quatro pacas (Cuniculus paca) adultas excedentes do plantel do Setor de Anima...

Caracterización y consecuencias de un deslizamiento en un área marginal del Pirineo oriental (Cava, Sierra de Cadí, Enero de 1997

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Molina, David

1997-12-01

Full Text Available The rain which took place between November 1996 and January 1997 caused a landslide in the surrounding area of the village of Cava, placed in the basin of the river Segre (Catalan Prepyrenees. The litology and structure of the mobilized materials, and the agrarian works and its further abandonment, as well, have been fundamental features causing the aforementioned erosive process. The study of this phenomena has highlighted the existence of two different parts: a rotational movement in a hillside's sector and a mud flow. The analysis of the space-time cause's of these processes, its inter-relation with similar ones, and its influence on the human activities, constitute an essential feature in order to define planification and prevention strategies.

[es] Las precipitaciones acaecidas entre noviembre de 1996 y enero de 1997 dieron lugar a un deslizamiento de tierras en las inmediaciones del pueblo de Cava, situado en la cuenca del río Segre (Prepirineo Catalán. La litología y la estructura de los materiales movilizados, así como las prácticas de conservación agrícola y su posterior abandono, han sido fundamentales en el desencadenamiento de este proceso erosivo. El estudio del fenómeno ha puesto de relieve dos partes diferenciadas: un movimiento rotacional en un sector de la ladera y una colada de barro originada por los materiales acumulados en la cabecera del torrente por el cual discurrió posteriormente. El análisis de las causas espacio-temporales de estos procesos y su interrelación con otros parecidos, así como la incidencia en las actividades humanas, son un factor esencial para definir estrategias de planificación y prevención.
[fr] Les pluies ayant eu lieu entre novembre 1996 et janvier 1997 ont provoqué un glissement de terres aux alentours du village de Cava, situé dans le bassin de la rivière Segre (Prepyrenées de Catalogne. La lithologie et la structure des matériaux mobilisés, ainsi que les m

Persistencia de la vena cava superior izquierda: Diagnóstico e importancia prenatal Persistency of the left superior caval vein: Diagnosis and its prenatal importance

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Juan F Jaramillo

2010-04-01

Full Text Available Durante un ultrasonido obstétrico de rutina se deben realizar ciertos planos del corazón en los cuales no es complejo identificar un grupo de anomalías como la persistencia de la vena cava superior izquierda. Cuando se identifica una vena cava superior izquierda aislada, sin otras anomalías del corazón fetal, no existe ninguna repercusión perinatal. Su importancia radica en que un grupo considerable de estos casos se acompaña de cardiopatías congénitas y anomalías anatómicas y cromosómicas. En este artículo se describen nueve casos de vena cava superior izquierda persistente, al igual que las anomalías del corazón asociadas, como también las alteraciones extracardiacas encontradas.Certain heart fetal planes must be realized during a routine obstetric ultrasound in order to identify a group of anomalies such as the persistency of the left superior caval vein. When an isolated left superior venal vein is identified without any other anomaly of the fetal heart, it does not have any perinatal repercussion. Its importance lies in the fact that a considerable number of these cases are associated with a high incidence of congenital heart diseases and anatomic and chromosomal abnormalities. This article reports nine cases of persistency of the left superior caval vein as well as the associated heart abnormalities and the extra-cardiac alterations found.

Successful Venous Angioplasty of Superior Vena Cava Syndrome after Heart Transplantation

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Thomas Strecker

2014-01-01

Full Text Available Introduction. For patients with terminal heart failure, heart transplantation (HTX has become an established therapy. Before transplantation there are many repeated measurements with a pulmonary artery catheter (PAC via the superior vena cava (SVC necessary. After transplantation, endomyocardial biopsy (EMB is recommended for routine surveillance of heart transplant rejection again through the SVC. Case Presentation. In this report, we present a HTX patient who developed a SVC syndrome as a possible complication of all these procedures via the SVC. This 35-year-old Caucasian male could be successfully treated by balloon dilatation/angioplasty. Conclusion. The SVC syndrome can lead to pressure increase in the venous system such as edema in the head and the upper part of the body and further serious complications like cerebral bleeding and ischemia, or respiratory problems. Balloon angioplasty and stent implantation are valid methods to treat stenoses of the SVC successfully.

Desenvolvimento de métodos analíticos rápidos e de baixo custo utilizando ciclodextrinas para o controle de qualidade de fármacos

OpenAIRE

Gonçalves Cadena, Pabyton

2009-01-01

O ácido desoxicólico (DCA) e o ácido ursodesoxicólico (UDCA) são ácidos biliares com inúmeras aplicações farmacêuticas, no entanto, as metodologias empregadas para determinação de suas concentrações são demoradas e onerosas. Neste trabalho foram usadas as ciclodextrinas, oligossacarídeos cíclicos, que têm a capacidade de formar complexos de inclusão no desenvolvimento de uma metodologia colorimétrica, rápida e de baixo custo. Este método é baseado numa reação de complexação com...

Algoritmo de optimización para el cálculo de múltiples raíces de sistemas de ecuaciones no lineales

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Jorge Cruz Duarte

2013-01-01

Full Text Available En este artículo se presenta una estrategia novedosa para la búsqueda de múltiples soluciones en sistemas de ecuaciones no lineales, mediante la metaheurística de optimización por enjambre de partículas, y su versión unificada. Inicialmente, se expone una sección de fundamentos, donde se muestran las bases de las técnicas numéricas utilizadas y también la transformación del problema de solución en uno de optimización. Se comprueba esta nueva estrategia con diferentes tipos de sistemas, variando sistemáticamente el tamaño de los mismos para observar el comportamiento de las metaheurísticas usadas. Luego de analizar los datos obtenidos, se encuentra que la estrategia implementada tiene un gran potencial de aplicación en problemas de ingeniería. Para los sistemas analizados en este escrito, se recomienda utilizar la versión unificada o la original, dependiendo de si el sistema es pequeño o grande (menor o mayor a cinco ecuaciones e incógnitas, respectivamente.

Solución de redes de flujo para gases usando el modelo de balance de nodos y el método de linealización de ecuaciones

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Paulo César Narváez

1999-09-01

Full Text Available El dimensionamiento de redes de distribución de gases es un problema complejo, tanto por la diversidad de los fenómenos que se presentan, como por la variación de las propiedades de los fluidos, en especial, la densidad por efecto de los cambios en la presión a lo largo de la red. Este trabajo presenta un modelo para su simulación a partir de la deducción de la ecuación general de flujo en estado estable e isotérmico, su inclusión en el modelo de balance de nodos y la solución de este por el método de linealización de ecuaciones. Adicionalmente, se hace un resumen de las ecuaciones empíricas más usadas para el cálculo de la caída de presión para gases fluyendo en tuberías y un ejemplo que ilustra la aplicación del modelo y el método desarrollado.

Therapeutic effect and prognostic analysis of intensity-modulated radiotherapy for primary hepatocellular carcinoma with portal vein and/or inferior vena cava tumor thrombus

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HUANG Long

2015-06-01

Full Text Available ObjectiveTo determine the efficacy and prognostic factors of intensity-modulated radiotherapy (IMRT for primary hepatocellular carcinoma (HCC with portal vein and/or inferior vena cava tumor thrombus. MethodsTwenty-three HCC patients with portal vein and/or inferior vena cava tumor thrombus received IMRT with an 8 MV linear accelerator at the Cancer Center of General Hospital of Armed Police Forces, Anhui Medical University, from April 2008 to August 2011. A single dose of 3 to 6 Gy was delivered at five fractions per week, with a total dose of 56 to 96 Gy and a median dose of 60 Gy. Survival time was recorded, and adverse reactions were evaluated. Survival rate calculation and survival analysis were performed using the Kaplan-Meier method. Comparison of categorical between two groups was made by chi-square test. ResultsOne patient did not complete radiotherapy due to upper gastrointestinal bleeding. Of 22 patients who completed IMRT, 4 achieved complete remission and 10 achieved partial remission, with an overall response rate of 63.7%. Our analysis showed that the type of tumor thrombus and tumor size were associated with tumor response rate and were significant prognostic factors (P＜0.05. The median survival time was 13.4 months. The 1-, 2-, and 3-year survival rates were 59%, 27%, and 18%, respectively. The 22 patients who completed radiotherapy did not experience acute radiation injury or late adverse outcomes such as radiation-induced liver disease. ConclusionThis study suggests IMRT is a safe and effective treatment option for HCC patients with portal vein and/or inferior vena cava tumor thrombus.

Endovascular treatment of intrahepatic inferior vena cava obstruction from malignant hepatocellular tumor thrombus utilizing Luminexx self-expanding nitinol stents

International Nuclear Information System (INIS)

Stambo, Glenn W.; Leto, John; George, Christopher; Van Epps, Kelly; Woeste, Troy; Berlet, Mathew

2008-01-01

Inferior vena cava (IVC) obstruction is a well-described clinical entity. Most IVC obstructions from malignant neoplasms are a direct result of tumor compression [Oviedo J, Cerda S. Vascular invasion by hepatocellular carcinoma. Arch Pathol Lab Med 2001;125: 454-5; Furui S, Sawada S, et al. Gianturco stent placement in malignant caval obstruction: analysis of factors for predicting the outcome. Radiology 1995;195:147-52; Fletcher WS, Lakin PC, et al. Results of treatment of inferior vena cava syndrome with expandable metallic stents. Arch Surg 1998;133:935-8]. The symptoms of IVC obstruction include progressive ascites, scrotal edema and lower body edema. These constellations of symptoms are described as IVC syndrome and are devastating to a patient with end-stage cancer. We describe a palliative therapy utilizing Luminexx nitinol self-expanding stents to treat intracaval hepatoma thrombus obstructing the IVC. The procedure is rapidly performed, technically reliable, and has essentially no morbidity or mortality. This procedure can be performed in the interventional radiology suite with excellent results resolving the IVC syndrome soon after placement of the stents. We believe endovascular stenting as an excellent palliative therapy for patients with IVC syndrome and should be the treatment of choice for caval obstructions due to intraluminal tumor thrombus

Endovascular treatment of intrahepatic inferior vena cava obstruction from malignant hepatocellular tumor thrombus utilizing Luminexx self-expanding nitinol stents

Energy Technology Data Exchange (ETDEWEB)

Stambo, Glenn W. [Division of Vascular and Interventional Radiology, Department of Radiology, St. Joseph' s Hospital and Medical Center, 4516 North Armenia Avenue, Tampa, FL 33603 (United States)], E-mail: xraydoc2@yahoo.com; Leto, John [Division of Vascular and Interventional Radiology, Department of Radiology, St. Joseph' s Hospital and Medical Center, 3001 W. Dr. Martin Luther King Jr. Blvd., Tampa, FL 33607 (United States); George, Christopher [Department of Hematology and Oncology, St. Joseph' s Hospital and Medical Center, 4301 W. Habana Avenue, Suite 1, Tampa, FL 33607 (United States); Van Epps, Kelly; Woeste, Troy; Berlet, Mathew [Division of Vascular and Interventional Radiology, Department of Radiology, St. Joseph' s Hospital and Medical Center, 4516 North Armenia Avenue, Tampa, FL 33603 (United States)

2008-05-15

Inferior vena cava (IVC) obstruction is a well-described clinical entity. Most IVC obstructions from malignant neoplasms are a direct result of tumor compression [Oviedo J, Cerda S. Vascular invasion by hepatocellular carcinoma. Arch Pathol Lab Med 2001;125: 454-5; Furui S, Sawada S, et al. Gianturco stent placement in malignant caval obstruction: analysis of factors for predicting the outcome. Radiology 1995;195:147-52; Fletcher WS, Lakin PC, et al. Results of treatment of inferior vena cava syndrome with expandable metallic stents. Arch Surg 1998;133:935-8]. The symptoms of IVC obstruction include progressive ascites, scrotal edema and lower body edema. These constellations of symptoms are described as IVC syndrome and are devastating to a patient with end-stage cancer. We describe a palliative therapy utilizing Luminexx nitinol self-expanding stents to treat intracaval hepatoma thrombus obstructing the IVC. The procedure is rapidly performed, technically reliable, and has essentially no morbidity or mortality. This procedure can be performed in the interventional radiology suite with excellent results resolving the IVC syndrome soon after placement of the stents. We believe endovascular stenting as an excellent palliative therapy for patients with IVC syndrome and should be the treatment of choice for caval obstructions due to intraluminal tumor thrombus.

Should We Remove the Retrievable Cook Celect Inferior Vena Cava Filter? Eight Years of Experience at a Single Center

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Joohyung Son

2017-12-01

Full Text Available Background: The inferior vena cava filter (IVCF is very effective for preventing pulmonary embolism in pa-tients who cannot undergo anticoagulation therapy. However, if a filter is placed in the body permanently, it may lead to other complications. Methods: A retrospective study was performed of 159 patients who under-went retrievable Cook Celect IVCF implantation between January 2007 and April 2015 at a single center. Baseline characteristics, indications, and complications caused by the filter were investigated. Results: The most common underlying disease of patients receiving the filter was cancer (24.3%. Venous thrombolysis or thrombectomy was the most common indication for IVCF insertion in this study (47.2%. The most common complication was inferior vena cava penetration, the risk of which increased the longer the filter remained in the body (p=0.032, Exp(B=1.004. Conclusion: If the patient is able to retry anticoagulation therapy and the filter is no longer needed, the filter should be removed, even if a long time has elapsed since implantation. If the filter cannot be removed, it is recommended that follow-up computed tomography be performed regularly to monitor the progress of venous thromboembolisms as well as any filter-related complications.

Consideraciones especiales para realizar pruebas de usabilidad con niños: Caso de Estudio

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María Esperanza Pérez Cordoba Sánchez

2015-02-01

Full Text Available Cuando se aplican pruebas de usabilidad se espera que los resultados arrojen un diagnóstico con respecto a la facilidad de uso y del grado de satisfacción de los usuarios. Se sabe desde hace mucho tiempo que el diseño de las interfaces es parte crucial en la percepción que se tiene del sistema, para lograr un buen diseño es necesario conocer de antemano quién es el usuario final y después se tienen que cubrir las necesidades de uso. Esto es especialmente cierto cuando se trabaja con niños, dado que influyen factores como la forma en la que aprenden, sus gustos, el grado de distracción, su facilidad para seguir indicaciones, la motivación para ejecutar las tareas e incluso cuestiones como la ergonomía. En el presente trabajo se reportan algunos hallazgos que resultaron de realizar pruebas de usabilidad con niños a un sistema interactivo controlado por Kinect. Se describe la metodología usada durante las pruebas así como los aspectos y diferencias que existen con respecto a las pruebas de usabilidad con adultos. También se incluye una revisión bibliográfica de trabajos publicados que tratan el tema de pruebas de usabilidad con niños, con lo que se busca dar soporte al presente trabajo.

A prebiotic role of Ecklonia cava improves the mortality of Edwardsiella tarda-infected zebrafish models via regulating the growth of lactic acid bacteria and pathogen bacteria.

Science.gov (United States)

Lee, WonWoo; Oh, Jae Young; Kim, Eun-A; Kang, Nalae; Kim, Kil-Nam; Ahn, Ginnae; Jeon, You-Jin

2016-07-01

In this study, the beneficial prebiotic roles of Ecklonia cava (E. cava, EC) were evaluated on the growth of lactic acid bacteria (LAB) and pathogen bacteria and the mortality of pathogen-bacteria infected zebrafish model. The result showed that the original E. cava (EC) led to the highest growth effects on three LABs (Lactobacillus brevis, L. brevis; Lactobacillus pentosus, L. pentosus; Lactobacillus plantarum; L. plantarum) and it was dose-dependent manners. Also, EC, its Celluclast enzymatic (ECC) and 100% ethanol extracts (ECE) showed the anti-bacterial activities on the fish pathogenic bacteria such as (Edwardsiella tarda; E. tarda, Streptococcus iniae; S. iniae, and Vibrio harveyi; V. harveyi). Interestingly, EC induced the higher production of the secondary metabolites from L. plantarum in MRS medium. The secondary metabolites produced by EC significantly inhibited the growth of pathogen bacteria. In further in vivo study, the co-treatment of EC and L. plantarum improved the growth and mortality of E. tarda-infected zebrafish as regulating the expression of inflammatory molecules such as iNOS and COX2. Taken together, our present study suggests that the EC plays an important role as a potential prebiotic and has a protective effect against the infection caused by E. tarda injection in zebrafish. Also, our conclusion from this evidence is that EC can be used and applied as a useful prebiotic. Copyright © 2016 Elsevier Ltd. All rights reserved.

CT of anomalies of the inferior vena cava and left renal vein

International Nuclear Information System (INIS)

Kokubo, Takashi; Oyama, Kazuyuki; Ohtomo, Kuni; Yashiro, Naobumi; Itai, Yuji; Iio, Masahiro; Masuyama, Shigeyoshi.

1988-01-01

Incidence of anomalies of the inferior vena cava (IVC) and left renal vein (LRV) was examined with post-contrast abdominal CT studies in the last five years and seven months retrospectively. Of the total 1100 cases, right retrocaval ureter was noted in two cases (0.2 %), left IVC was two (0.2 %) and bilateral IVC was twelve (1.1 %) about anomalies of the IVC. As to anomalies of the LRV, retroaortic LRV was four (0.4 %) and circumaortic LRV was six (0.5 %). These results did not always agree with those of previous reports on dissection cases. Particularly, incidence of anomalies of the LRV on CT was much lower than that on dissection. We speculated that racial difference was one of its causes. Clinical usefulness of CT for evaluation of anomalies of the IVC and LRV was stressed. (author)

Gunther Tulip Inferior Vena Cava Filter Placement During Treatment for Deep Venous Thrombosis of the Lower Extremity

International Nuclear Information System (INIS)

Yamagami, Takuji; Kato, Takeharu; Iida, Shigeharu; Hirota, Tatsuya; Nishimura, Tsunehiko

2005-01-01

Purpose. To evaluate the efficacy and safety of Gunther tulip retrievable vena cava filter (GTF) implantation to prevent pulmonary embolism during intravenously administered thrombolytic and anticoagulation therapy and interventional radiological therapy for occlusive or nonocclusive deep venous thrombosis (DVT) of the lower extremity. Methods. We evaluated placement of 55 GTFs in 42 patients with lower extremity DVT who had undergone various treatments including those utilizing techniques of interventional radiology. Results. Worsening of pulmonary embolism in patients with existing pulmonary embolism or in those without pulmonary embolism at the time of GTF insertion was avoided in all patients. All attempts at implantation of the GTF were safely accomplished. Perforation and migration experienced by one patient was the only complication. Mean period of treatment for DVT under protection from pulmonary embolism by the GTF was 12.7 ± 8.3 days (mean ± SD, range 4-37 days). We attempted retrieval of GTFs in 18 patients in whom the venous thrombus had disappeared after therapy, and retrieval in one of these 18 cases failed. GTFs were left in the vena cava in 24 patients for permanent use when the DVT was refractory to treatment. Conclusion. The ability of the GTF to protect against pulmonary embolism during treatment of DVT was demonstrated. Safety in both placement and retrieval was clarified. Because replacement with a permanent filter was not required, use of the GTF was convenient when further protection from complicated pulmonary embolism was necessary

Posterior Nutcracker Syndrome Associated with Interrupted Left Inferior Vena Cava with Azygos Continuation and Retroaortic Right Renal Vein

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Luo, Xiao Li; Zhou, Xiao Dong [Xijing Hospital, Fourth Military Medical University, Shaanxi (China); Qian, Gen Nian; Xiao, Hui; Zhao, Chun Lei [Fuzhou General Hospital, Fujian (China)

2012-06-15

Various anatomic anomalies have been considered the causes of nutcracker syndrome (NCS). Posterior NCS refers to the condition, in which vascular narrowing was secondary to the compression of the retroaortic left renal vein while it is crossing between the aorta and the vertebral column. Here, we report an unusual case of posterior NCS associated with a complicated malformation of the interrupted left inferior vena cava with azygos continuation and retroaortic right renal vein, diagnosed by both color Doppler ultrasonography and CT angiography.

Posterior Nutcracker Syndrome Associated with Interrupted Left Inferior Vena Cava with Azygos Continuation and Retroaortic Right Renal Vein

International Nuclear Information System (INIS)

Luo, Xiao Li; Zhou, Xiao Dong; Qian, Gen Nian; Xiao, Hui; Zhao, Chun Lei

2012-01-01

Various anatomic anomalies have been considered the causes of nutcracker syndrome (NCS). Posterior NCS refers to the condition, in which vascular narrowing was secondary to the compression of the retroaortic left renal vein while it is crossing between the aorta and the vertebral column. Here, we report an unusual case of posterior NCS associated with a complicated malformation of the interrupted left inferior vena cava with azygos continuation and retroaortic right renal vein, diagnosed by both color Doppler ultrasonography and CT angiography.

Traumatismos de veia cava inferior

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Cleinaldo de Almeida Costa

Full Text Available OBJETIVO: Avaliar a incidência, o perfil clínico e as estratégias operatórias dos ferimentos de Veia Cava Inferior (VCI. MÉTODOS: Foram analisados retrospectivamente os prontuários de 76 doentes com ferimento de VCI atendidos nos dois prontossocorros de Manaus, no período de janeiro de 1997 a julho de 2002. Mecanismo de lesão, mortalidade, estado hemodinâmico, índice de trauma abdominal penetrante (PATI, achados intra-operatórios e conduta cirúrgica foram estudados. RESULTADOS: Quarenta e nove (65% doentes sofreram lesão por arma branca, 26 (34% por arma de fogo e um por traumatismo abdominal fechado. Quarenta e um (54% doentes sobreviveram. Quase todos chegaram acordados, entretanto 40% estavam hipotensos (pressão arterial sistólica < 70mmHg. O índice de trauma abdominal penetrante (PATI médio foi maior que 40. À laparotomia, todos demonstraram sangramento retroperitoneal ativo ou hematoma retroperitoneal em expansão. Vinte e um pacientes possuíam lesão de VCI retro-hepática, enquanto nos outros 55 a lesão era infra-hepática. O reparo operatório predominante foi a venorrafia lateral em 65 doentes. Houve necessidade de tóraco-freno-laparotomia em quatro doentes do total de oito doentes que foram à toracotomia direita por lesão retro-hepática. Foram realizados shunts átrio-cavais em seis doentes, dos quais três sobreviveram. CONCLUSÕES: O ferimento de VCI é uma lesão de alta letalidade e possui uma relação intrínseca com a violência urbana. A sobrevivência depende de uma imediata e vigorosa reposição de volume, um manejo operatório adequado e todo esforço em evitar-se hipotermia.

Marketing social para doação de sangue: análise da predisposição de novos doadores

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Stephanie Ingrid Souza Barboza

2014-07-01

Full Text Available Este artigo objetiva compreender os fatores motivacionais que influenciam os indivíduos a doarem sangue, com a finalidade de subsidiar as ações de marketing social orientadas à captação de novos doadores. Com base em uma revisão teórica, um modelo de hipóteses foi elaborado, para análise de influências e interações de construtos na formação da predisposição das pessoas a serem doadores de sangue. Foi feito o levantamento de campo por meio de um questionário estruturado, junto a uma amostra de 346 pessoas. Para análise, foram usadas técnicas de análise descritiva, avaliação de consistência psicométrica e modelagem de equações estruturais com estimação por mínimos quadrados parciais. Como resultados, verificou-se principalmente que há uma influência negativa do medo e positiva do grupo de referência na predisposição dos sujeitos em doar sangue. Isso indicou que as ações de marketing social para a doação de sangue são mais eficientes em incentivar novos doadores se mantiverem foco nesses dois fatores.

Arquitectura flexible basada en ISA 88 para el diseño del diagrama de control de ejecución en aplicaciones distribuidas usando IEC 61499

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Fabricio Chicaiza

2018-03-01

Full Text Available En la actualidad los sistemas de automatización industrial deben optimizar las técnicas de control y comunicación de sus procesos, para introducir conceptos dados por la Industria 4.0. Para lograr esto se necesita de la introducción de nuevas normas de automatización para obtener sistemas de fabricación ágiles e inteligentes, es por esto que la norma IEC 61499 es considerada como la opción principal. Industria 4.0 en unión con IEC 61499 permitirá la integración de sistemas de adquisición de datos tradicionales y novedosos sistemas de procesamiento inteligente de datos, con el objetivo de extraer información y mejorar el rendimiento general del sistema productivo. El presente trabajo establece un enfoque de arquitectura flexible para el diseño de los Diagramas de Control de Ejecución de los Bloques de Función basado en la norma ISA 88 aplicado a un proceso industrial, lo que permitirá implementar el control industrial bajo IEC 61499 de manera eficiente y rápida permitiendo un diseño se software basado en componentes con independencia de la plataforma hardware usada.

Validación de una versión española del "Neck Disability Index" y uso de la misma para investigar la eficacia de la diatermia por microondas en el dolor cervical crónico inespecífico

OpenAIRE

Andrade-Ortega, Juan-Alfonso

2012-01-01

[ES] Pese al extendido uso de las modalidades físicas en el tratamiento del dolor cervical, el soporte científico que las avala es pobre o inexistente, por lo que se plantea la investigación en este tema. Para ello, se necesitan herramientas de medición de la discapacidad por dolor cervical. En esta tesis, se valida la versión española del "Neck Disability lndex", la escala de discapacidad por cervicalgia más usada del mundo, constatándose su consistencia interna, fiabilidad, validez y sen...

ANÁLISIS BIBLIOMÉTRICO EN UNA UNIVERSIDAD CUBANA COMO HERRAMIENTA PARA LA INTELIGENCIA EMPRESARIAL

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Darlenis Herrera-Vallejera

2016-01-01

Full Text Available La Bibliometría es una herramienta para realizar estudios de tendencias, estos últimos son considerados uno de los servicios de la Inteligencia Empresarial. En la actualidad la Bibliometría constituye un área instrumental válida para la evaluación de la actividad científica; usada para determinar el comportamiento del desempeño científico individual e institucional de la comunidad científica y académica, liderazgo científico y áreas emergentes del conocimiento, aspectos que se consideran por los programas internacionales para financiar proyectos de investigación e innovación; así como por las políticas institucionales para otorgar mejores plazas y validar doctorados. La dimensión evaluativa de la Bibliometría se enmarca en tres variables: producción científica, colaboración científica e impacto científico. En este orden de ideas, la presente investigación se basó en la Bibliometría, como herramienta de la inteligencia empresarial, a través de un estudio de caso aplicado a una Universidad cubana. Se aplicó la metodología bibliométrica para la evaluación de la actividad científica, desarrollada por el Instituto de Información Científica y Tecnológica de Cuba. Se compiló la producción científica de la universidad en la base de datos bibliográfica SCOPUS durante el período 2005-2012 y se empleó el Bibexcel y Ucinet 6.1 para el procesamiento matricial y la visualización de los datos. Como resultado, se obtuvo que los profesores más productivos son los doctores en ciencias, predominando el género masculino. Se concluye que la aplicación de la Bibliometría como método para realizar análisis de tendencias fue de gran utilidad para la toma de decisiones, por la dirección de ciencia y tecnología de la Universidad cubana.

Gêneros Textuais e formação de professores (PARFOR para o interior do Amazonas

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Paulo Vinícius Ávila Nóbrega

2011-02-01

Full Text Available O intuito deste artigo é mostrar duas propostas de produção de gêneros textuais escritos elaboradas por professores cursistas de uma disciplina do Plano Nacional de Formação de Professores de Educação Básica, da Universidade Federal do Amazonas. Os dados correspondem a projetos de aula com produção textual com gênero escrito ou oral entregues pelos cursistas como requisito de conclusão da disciplina. Estes projetos procuram ser baseados nas postulações da sequência didática de Schneuwly e Dolz (2007 e no método dos descritores do SAEB para a Prova Brasil. Percebeu-se que alguns proponentes compreenderam o funcionamento produtivo das aulas de língua portuguesa quando usadas as produções de gêneros de texto presentes no cotidiano dos alunos.

Are Radiation Therapy Oncology Group Para-aortic Contouring Guidelines for Pancreatic Neoplasm Applicable to Other Malignancies—Assessment of Nodal Distribution in Gynecological Malignancies

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Kabolizadeh, Peyman; Fulay, Suyash; Beriwal, Sushil, E-mail: beriwals@upmc.edu

2013-09-01

Purpose: Intensity modulated radiation therapy is used to reduce dose to adjacent critical structures while maintaining adequate target coverage, but it requires precise target localization. We report the 3-dimensional distribution of para-aortic (PA) lymph nodes (LN) in pelvic malignancies. We propose a guideline to accurately define the PA LN by anatomic landmarks and compare our data with published guidelines for pancreatic cancer. Methods and Materials: A retrospective analysis was performed on 46 patients with pelvic malignancies and positive PA LNs. Positive LNs were defined based on size and morphology or fluorodeoxyglucose avidity. All PA LNs were characterized into 3 groups based on location: left PA (between aorta and left psoas muscle), aortocaval (between aorta and inferior vena cava), and right paracaval (between inferior vena cava and right psoas muscle). Patients with retrocrural LNs were also analyzed. Results: One hundred thirty-three positive PA LNs were evaluated. The majority of the PA LNs were in the left PA (59%) and aortocaval (35) regions, and only 8% were in the right paracaval region. All patients with positive right paracaval LNs also had involved left PA LNs, with only 1 exception. The highest PA LN involvement was at the level of the renal vessels and was seen in 28% of patients. Of these patients with disease extending to renal vessels, 38% had retrocrural LN involvement. Conclusions: The nodal contouring for the PA region should not be defined by a fixed circumferential margin around the vessels. The left PA and aortocaval spaces should be covered adequately because these are common locations of PA LNs. For microscopic disease superiorly, contouring should extend up to renal vessels rather than a fixed bony landmark. For patients who have nodal involvement at renal vessels, one can consider including retrocrural LNs. Radiation Therapy Oncology Group Para-aortic Contouring Guidelines for Pancreatic Neoplasm are not applicable to

Are Radiation Therapy Oncology Group Para-aortic Contouring Guidelines for Pancreatic Neoplasm Applicable to Other Malignancies—Assessment of Nodal Distribution in Gynecological Malignancies

International Nuclear Information System (INIS)

Kabolizadeh, Peyman; Fulay, Suyash; Beriwal, Sushil

2013-01-01

Purpose: Intensity modulated radiation therapy is used to reduce dose to adjacent critical structures while maintaining adequate target coverage, but it requires precise target localization. We report the 3-dimensional distribution of para-aortic (PA) lymph nodes (LN) in pelvic malignancies. We propose a guideline to accurately define the PA LN by anatomic landmarks and compare our data with published guidelines for pancreatic cancer. Methods and Materials: A retrospective analysis was performed on 46 patients with pelvic malignancies and positive PA LNs. Positive LNs were defined based on size and morphology or fluorodeoxyglucose avidity. All PA LNs were characterized into 3 groups based on location: left PA (between aorta and left psoas muscle), aortocaval (between aorta and inferior vena cava), and right paracaval (between inferior vena cava and right psoas muscle). Patients with retrocrural LNs were also analyzed. Results: One hundred thirty-three positive PA LNs were evaluated. The majority of the PA LNs were in the left PA (59%) and aortocaval (35) regions, and only 8% were in the right paracaval region. All patients with positive right paracaval LNs also had involved left PA LNs, with only 1 exception. The highest PA LN involvement was at the level of the renal vessels and was seen in 28% of patients. Of these patients with disease extending to renal vessels, 38% had retrocrural LN involvement. Conclusions: The nodal contouring for the PA region should not be defined by a fixed circumferential margin around the vessels. The left PA and aortocaval spaces should be covered adequately because these are common locations of PA LNs. For microscopic disease superiorly, contouring should extend up to renal vessels rather than a fixed bony landmark. For patients who have nodal involvement at renal vessels, one can consider including retrocrural LNs. Radiation Therapy Oncology Group Para-aortic Contouring Guidelines for Pancreatic Neoplasm are not applicable to

Repositioning and Leaving In Situ the Central Venous Catheter During Percutaneous Treatment of Associated Superior Vena Cava Syndrome: A Report of Eight Cases

International Nuclear Information System (INIS)

Stockx, Luc; Raat, Henricus; Donck, Jan; Wilms, Guy; Marchal, Guy

1999-01-01

Purpose: To describe a combined procedure of repositioning and leaving in situ a central venous catheter followed by immediate percutaneous treatment of associated superior vena cava syndrome (SVCS). Methods: Eight patients are presented who have central venous catheter-associated SVCS (n = 6 Hickman catheters, n = 2 Port-a-cath) caused by central vein stenosis (n = 4) or concomitant thrombosis (n = 4). With the use of a vascular snare introduced via the transcubital or transjugular approach, the tip of the central venous catheter could be engaged, and repositioned after deployment of a stent in the innominate or superior vena cava. Results: In all patients it was technically feasible to reposition the central venous catheter and treat the SVCS at the same time. In one patient flipping of the Hickman catheter in its original position provoked dislocation of the released Palmaz stent, which could be positioned in the right common iliac vein. Conclusion: Repositioning of a central venous catheter just before and after stent deployment in SVCS is technically feasible and a better alternative than preprocedural removal of the vascular access

Uso do produto MOD13Q1 do sensor Modis para análise temporal e mapeamento das florestas nas Serras do Sudeste e Campanha Meridional do Rio Grande do Sul

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Ana Caroline Paim Benedetti

2013-06-01

Full Text Available Imagens NDVI (Índice de Vegetação por Diferença Normalizada do sensor Modis foram utilizadas para mapear as classes de uso e cobertura da terra nas Serras do Sudeste e Campanha Meridional do Rio Grande do Sul. A metodologia compreendeu a elaboração de um banco de dados espaciais e a aplicação de técnicas de processamento digital (contraste linear, classificação digital e operações aritméticas sobre imagens dos satélites Landsat e Terra de diversas datas. Os resultados indicaram que a cobertura florestal passou de 8,6% para 11,6% e 14,3% da área total da microrregião Serras do Sudeste, entre os anos 2000, 2004 e 2008. Na Campanha Meridional, a expansão da cobertura florestal passou de 11,1% para 11,2% e 11,5% da área total no mesmo período. Conclui-se que imagens MOD13Q1, de baixa resolução espacial (250 m, podem ser usadas em grandes áreas para mapear florestas e os demais temas adequadamente.

Persistent Left Superior Vena Cava Associated with Hemiazygos Vein Draining in It and Absence of Left Brachiocephalic Vein, in a Patient with Congenital Heart Defect

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Opincariu Diana

2016-09-01

Full Text Available Persistent left superior vena cava is an anomalous vein that derives from a malfunction of obliteration of the left common cardinal vein during intrauterine life. The diagnosis can be suggested by a dilated coronary sinus as seen in echocardiography, or other imagistic methods. Due to the lack of hemodynamic impairment, and consequently with few or no symptoms, this vascular anomaly is frequently discovered incidentally. In this brief report we present the case of a 35-year-old male known with a complex congenital cardiovascular malformation that included atrial septum defect, persistent left superior vena cava and anomalous right pulmonary vein drainage in the PLSVC, diagnosed with sinoatrial block that required pacemaker implantation. Due to the patient’s medical history, investigations to decide the best approach needed for pacemaker implantation were performed, including a thoracic CT that incidentally found additional anomalies — the hemiazygos vein draining in PLSVC and the lack of the left brachiocephalic vein.

Prueba de Elisa indirecta del lisado total de Bartonella bacilliformis para el diagnóstico rápido de la enfermedad de Carrión

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Elizabeth Anaya

2008-04-01

Full Text Available Se elaboró y estandarizó una prueba de ELISA indirecta con el lisado total de Bartonella bacilliformis procedentes de una cepa ATCC y de un aislamiento clínico. Se seleccionaron 86 sueros de pacientes con diagnóstico confirmado de enfermedad de Carrión por frotis y cultivo, 51 sueros negativos de pacientes de zonas no endémicas y 32 sueros de pacientes con diagnóstico serológico confirmado para otras enfermedades bacterianas como brucelosis, leptospirosis, sífilis y Rickettsiosis. Se encontró una sensibilidad de 68,6% (IC95%: 58,2-79,0%, especificidad de 94,1% (86,7-100%, valor predictivo positivo de 95,2% (89,0-100% y valor predictivo negativo de 64,0% (54,3-71,2%, con una reacción cruzada con otras etiologías bacterianas de 78,1% (25/32. Esta no es una prueba idónea para ser usada como herramienta diagnóstica para la Enfermedad de Carrión, se debe continuar los estudios hacia la búsqueda de una prueba rápida con mayor sensibilidad.

El uso de la neuromodulación para el tratamiento del temblor

Science.gov (United States)

Bendersky, Damián; Ajler, Pablo; Yampolsky, Claudio

2014-01-01

Introducción: El temblor puede ser un desorden incapacitante y el tratamiento de primera línea para estos pacientes es farmacológico. Sin embargo, este tratamiento puede llevar a una reducción satisfactoria del temblor en sólo el 50% de los pacientes con temblor esencial. La talamotomía era el tratamiento de elección para el temblor refractario al tratamiento médico hasta que comenzó a utilizarse la estimulación cerebral profunda (ECP) del núcleo ventral intermedio (Vim) del tálamo. En la actualidad, raramente se realiza la talamotomía. Métodos: Este artículo es una revisión no sistemática de las indicaciones, resultados, parámetros de programación y técnica quirúrgica de la ECP del Vim para el tratamiento del temblor. Resultados: Aunque los resultados clínicos son similares usando la talamotomía o la ECP del Vim, la primera causa más efectos adversos que la última. Además, la ECP puede ser usada bilateralmente, mientras que la talamotomía tiene un alto riesgo de causar disartria cuando se realiza de ambos lados. La ECP del Vim logró una adecuada mejoría del temblor en varias series de pacientes con temblor causado por temblor esencial, enfermedad de Parkinson o esclerosis múltiple. Además del Vim, hay otros blancos que están siendo usados por varios autores, tales como la zona incerta y las radiaciones prelemniscales. Conclusión: La ECP del Vim es un tratamiento útil para el temblor incapacitante refractario al tratamiento médico. Es esencial realizar una precisa selección de pacientes, así como utilizar una técnica quirúrgica correcta. Aún se desconoce el mejor blanco estereotáctico para el temblor, aunque el Vim es el más usado. PMID:25165613

Verificación analítica para las determinaciones de cromo hexavalente en aguas por espectrofotometría

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Carlos Alberto Severiche Sierra

2013-06-01

Full Text Available En la actualidad la prestación de servicios analíticos de laboratorios, toma de forma ascendente más auge y utilidad. El efecto de un análisis de aguas es forjar resultados correctos y confiables, siendo la verificación de ensayos uno de los aspectos más importantes y factor clave para conseguir este propósito. La determinación de cromo hexavalente en aguas por colorimetría con la difenilcarbazida es la metodología analítica más usada y útil que se conoce en el ámbito científico técnico, principalmente, por su alta selectividad y también debatida por su reacción a las interferencias. En el presente estudio se hizo la valoración analítica del método espectrofotométrico para la determinación de cromo hexavalente en aguas; el objetivo de este trabajo fue confirmar correctamente la aplicación del método para el análisis de aguas. Se trabajaron muestras de diferentes tipos de agua: potable, residual y superficial, siguiéndose estrictamente los protocolos de verificación. Se encontraron resultados satisfactorios en precisión y exactitud con el fin de emitir resultados confiables y reales de la muestra analizada.

Estudio del discurso escrito en páginas de internet como apoyo para la enseñanza de temas científicos: evolución y origen de la vida

OpenAIRE

Valeiras, Nora; Micieli, Carolina; Skicko, Marcela

2011-01-01

El presente trabajo analiza el discurso escrito que proponen un grupo de páginas Web sobre “Origen de la vida y Evolución”. Se definen categorías que permiten analizar el uso del enguaje, la procedencia y el diseño de las páginas. El método de estudio que se propone es descriptivo utilizándose técnicas cualitativas, fijándose características de las páginas Web, de tal forma que se puedan seleccionar como materiales para ser usadas en la generación de un programa de formación permanente de doc...

Renal Sinus Fat Invasion and Tumoral Thrombosis of the Inferior Vena Cava-Renal Vein: Only Confined to Renal Cell Carcinoma

OpenAIRE

Turker Acar; Mustafa Harman; Serkan Guneyli; Sait Sen; Nevra Elmas

2014-01-01

Epithelioid angiomyolipoma (E-AML), accounting for 8% of renal angiomyolipoma, is usually associated with tuberous sclerosis (TS) and demonstrates aggressive behavior. E-AML is macroscopically seen as a large infiltrative necrotic tumor with occasional extension into renal vein and/or inferior vena cava. However, without history of TS, renal sinus and venous invasion E-AML would be a challenging diagnosis, which may lead radiologists to misinterpret it as a renal cell carcinoma (RCC). In this...

Teoría del Pecking Order versus teoría del Trade off para la empresa Coservicios S.A. E.S.P.

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Sandra Milena Zambrano Vargas

2013-12-01

Full Text Available El presente trabajo pretende analizar el grado de aplicación de dos teorías de estructura de capital que han sido contradictorias y extensamente comparadas. Para la aplicación de la teoría del Trade Off se utilizan dos modelos, el primero propuesto por López y de Luna (2002 y el segundo es el propuesto por Cruz et al., (2003. Para la aplicación de la teoría del Pecking Order se analiza la forma como han sido manejadas las reservas, la deuda a largo plazo, el crecimiento de los activos operacionales netos, la tendencia que ha tenido la rentabilidad operacional de los activos y el EBITDA. Al final se encuentra que en los períodos analizados la teoría más usada ha sido la de Pecking Order la cual ha tenido más evidencia empírica en otras organizaciones, y de la teoría del Trade Off no se encontró aplicación.

Produtos naturais utilizados para tratamento de asma em crianças residentes na cidade de Salvador-BA, Brasil

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Ryan dos S. Costa

Full Text Available O conhecimento popular é o passo inicial para a investigação científica de atividades terapêuticas de remédios caseiros. Diversas patologias podem ser tratadas ou amenizadas através de preparações de origem natural e muitos fármacos disponíveis são oriundos de fontes naturais. Este trabalho tem como objetivo avaliar o uso de remédios caseiros derivados de plantas para tratamento de asma em crianças residentes no município de Salvador. Os dados foram obtidos a partir de estudo realizado em Salvador sobre fatores de risco, uso de medicações e vias imunológicas relacionadas à asma em crianças. Foram calculadas as freqüências de uso de preparações caseiras para tratamento de asma por esta população e realizado uma revisão bibliográfica sobre os efeitos das plantas mais usadas. Dentre as espécies mais citadas, destacam-se o Allium sativum (alho que teve a maior freqüência de utilização na preparação dos remédios caseiros (25%, seguido da Allium cepa (cebola, 19,74%. Após a revisão crítica de literatura, constatou-se que a maioria das espécies é utilizada com base em relatos fundamentados no saber popular, sendo assim carente de evidências científicas para as atividades farmacoterapêuticas esperadas. Neste sentido, há necessidade de mais estudos farmacológicos para comprovação das atividades terapêuticas peculiares a cada produto de origem natural bem como para avaliar possíveis efeitos tóxicos destes produtos.

Ação formativa e o desafio para a graduação em saúde

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Sílvia Maria Nóbrega-Therrien

Full Text Available Objetivamos identificar e caracterizar nos Projetos Político-Pedagógicos (PPPs dos cursos da área de saúde da Universidade Estadual do Ceará (Uece as estratégias usadas para estruturar o currículo relacionando e integrando ensino e pesquisa. Serviram como fonte de consulta os PPPs dos cursos e as legislações nacionais para o ensino superior. São ao todo 16 disciplinas de Metodologia da Pesqui sa: 5 em Enfermagem, 4 em Ciências Biológicas e Educação Física; 2 em Nutrição; 1 em Medicina. Apenas o curso de Educação Física apresenta continuidade de oferta das disciplinas durante a gradu ação. Quanto à ementa das disciplinas, observa-se uma lógica de concentração de informações técni cas nas disciplinas introdutórias nos semestres iniciais e nas de aplicação em semestres posteriores. Constatam-se mudanças positivas, como a implantação de disciplinas de monografia, mas somente a exigência do ensino da metodologia científica no currículo da graduação e do trabalho monográfico não é suficiente para incorporar a pesquisa ao ensino. Há necessidade de adequações curriculares e avaliação continuada dos PPPs.

Real-time flow - determination of vena cava inferior on two different levels via 'RACE' pulse sequence in MR

International Nuclear Information System (INIS)

Helzel, M.V.; Mueller, E.

1993-01-01

A new and simple parameter for quantiative evaluation of liver perfusion is outlined: Post-sinusoidal quantitative measurement of the entire liver venous flow: This is a result of the differences in evaluated flow volumes at two different levels in the inferior V.cava. The first level is the height of diaphragm, and the second is situated just cranial of the renal vessels. Normal values obtained from a group of healthy volunteers are presented. A gradient-echo pulse sequence called RACE, enabling flow measurements in real-time, is outlined. (orig.) [de

Evaluation of diagnostic reliability of radionuclide phlebography using 99mTc-MAA to detect deep venous thrombosis; Its role in establishing indications for inferior vena cava filter implantation

International Nuclear Information System (INIS)

Markovic, S.; Odavic, M.; Spaic, R.; Rostovac, M.; Ajdinovic, B.; Matunovic, A.; Raicevic, B.; Prvulov, S.; Kamenica, S.

1991-01-01

Radionuclide phlebography (RNP) of the lower extremities and pelvis was performed using 99m Tc-MAA in 40 patients with pulmonary thromboembolism. Deep venous thrombosis (DVT) was found in all patients, more frequently in the right calf and in the left iliac veins in 20 patients (55%). RNP and contrast phlebography (CP) were performed in 18 patients and confirmed the presence of DVT in all cases. The greatest specificity of RNP was obtained in the left (92.4%) and in the right pelvis (80%). In 12 of 18 patients in whom a cava filter was implanted, specificity of RNP was 100% for the left thigh and 91.7% for other localizations. In establishing indications for cava filter implantation, RNP should be performed prior to CP and bilaterally, but in case of non-indicated CE, RNP findings should be sufficient. (orig.) [de

Use of a Trellis Device for Endovascular Treatment of Venous Thrombosis Involving a Duplicated Inferior Vena Cava

Energy Technology Data Exchange (ETDEWEB)

Saettele, Megan R., E-mail: SaetteleM@umkc.edu [University of Missouri, Kansas City, Department of Radiology, Saint Luke' s Hospital (United States); Morelli, John N., E-mail: dr.john.morelli@gmail.com [Texas A and M University Health Science Center, Department of Radiology, Scott and White Clinic and Hospital (United States); Chesis, Paul; Wible, Brandt C. [University of Missouri, Kansas City, Department of Interventional Radiology, Saint Luke' s Hospital (United States)

2013-12-15

Congenital anomalies of the inferior vena cava (IVC) are increasingly recognized with CT and venography techniques. Although many patients with IVC anomalies are asymptomatic, recent studies have suggested an association with venous thromboembolism. We report the case of a 62-year-old woman with extensive venous clot involving the infrarenal segment of a duplicated left IVC who underwent pharmacomechanical thrombectomy and tissue plasminogen activator catheter-directed thrombolysis with complete deep venous thrombosis resolution. To our knowledge this is the first reported case in the English literature of the use of a Trellis thrombectomy catheter in the setting of duplicated IVC.

Colapsibilidade da Veia Cava Inferior e sinais e sintomas de insuficiência cardíaca: novos insights e possíveis associações Inferior Vena Cava collapsibility and heart failure signs and symptoms: new insights about possible links

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Renato De Vecchis

2012-06-01

Full Text Available FUNDAMENTO: Nos pacientes com Insuficiência Cardíaca Crônica (ICC foram propostas medidas ultrassonográficas do Índice de Colapsibilidade da Veia Cava Inferior (ICVCI para obter uma avaliação e classificação minuciosa da congestão hemodinâmica. OBJETIVO: A finalidade deste estudo era correlacionar os achados no exame físico com o ICVCI em pacientes com ICC. MÉTODOS: De acordo com um projeto de coorte retrospectivo, analisamos 54 pacientes com ICC, direita ou biventricular, classe NYHA III. O plano era determinar se alguma faixa de ICVCI basal poderia predizer uma persistência ou agravamento da congestão clínica achada no final do acompanhamento subsequente (isto é, após 1-2 meses do tratamento oral otimizado. Para essa finalidade, os pacientes foram subdivididos em três grupos de acordo com o valor de ICVCI basal: ≤ 15% (13 pts, 16 - 40% (21 pts e > 40% (20 pts. Diversos critérios clínicos de congestão foram comparados por meio dos três grupos e incorporados subsequentemente ao modelo multivariado de Cox. RESULTADOS: Preditores multivariados de alto escore de congestão foram distensão da veia jugular (FC: 13,38 95% IC: 2,13 - 84 p = 0,0059 e estertores (FC: 11 95% C.I : 1,45 - 83,8 p = 0,0213. O ICVCI ≤ 15% esteve sempre associado com um alto escore de congestão na segunda visita; todavia, o ICVCI o ≤ 15% não predisse um alto escore de congestão na segunda visita. CONCLUSÃO: No âmbito da ICC, um baixo ICVCI não predisse, em forma confiável, um elevado escore de congestão. Não obstante, o conjunto com ICVCI ≤ 15% sempre se achou associado com sinais e sintomas de uma ICC descompensada, tanto do lado direito como do esquerdo. (Arq Bras Cardiol. 2012; [online].ahead print, PP.0-0BACKGROUND: In chronic heart failure patients (CHF, ultrasound measurement of inferior vena cava collapsibility index (IVCCI has been proposed to yield careful assessment and grading of the hemodynamic congestion. OBJECTIVE: The

Vena Cava Filter Retrieval with Aorto-Iliac Arterial Strut Penetration.

Science.gov (United States)

Holly, Brian P; Gaba, Ron C; Lessne, Mark L; Lewandowski, Robert J; Ryu, Robert K; Desai, Kush R; Sing, Ronald F

2018-05-03

To evaluate the safety and technical success of inferior vena cava (IVC) filter retrieval in the setting of aorto-iliac arterial strut penetration. IVC filter registries from six large United States IVC filter retrieval practices were retrospectively reviewed to identify patients who underwent IVC filter retrieval in the setting of filter strut penetration into the adjacent aorta or iliac artery. Patient demographics, implant duration, indication for placement, IVC filter type, retrieval technique and technical success, adverse events, and post procedural clinical outcomes were identified. Arterial penetration was determined based on pre-procedure CT imaging in all cases. The IVC filter retrieval technique used was at the discretion of the operating physician. Seventeen patients from six US centers who underwent retrieval of an IVC filter with at least one strut penetrating either the aorta or iliac artery were identified. Retrieval technical success rate was 100% (17/17), without any major adverse events. Post-retrieval follow-up ranging from 10 days to 2 years (mean 4.6 months) was available in 12/17 (71%) patients; no delayed adverse events were encountered. Findings from this series suggest that chronically indwelling IVC filters with aorto-iliac arterial strut penetration may be safely retrieved.

Transient right-sided heart failure after percutaneous transluminal angioplasty (PTA) of Membranous obstruction of inferior vena cava: a case report

Energy Technology Data Exchange (ETDEWEB)

Park, Sung Bin [College of Medicine, University of Ulsan, Ulsan (Korea, Republic of); Lee, Deok hee; Kim, Yeon Suk; Jung, Seung Mun; Ryu, Dae Sik; Park, Man Soo [Kangnung Hospital, Kangnung (Korea, Republic of)

2000-09-01

We experienced a case of transient right-sided heart failure after angioplasty of membranous obstruction of the inferior vena cava confirmed by sonography and an inferior vena cavogram. Angioplasty involved the use of a self-expandable metallic stent, but after successful recanalization of the obstruction, the patient became dyspneic. Chest radiography revealed mild cardiomegaly with pulmonary congestion, but this was resolved spontaneously. For the prevention of serious heart failure, we recommend preprocedural evaluation of cardiac function. (author)

Espectroscopia no infravermelho próximo para a monitorização da perfusão tecidual Near-infrared spectroscopy for monitoring peripheral tissue perfusion in critically ill patients

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Alexandre Lima

2011-09-01

Full Text Available A espectroscopia no infravermelho próximo (NIRS tem sido principalmente usada na investigação da oxigenação periférica tecidual de forma não invasiva e contínua. O princípio da espectroscopia consiste na aplicação da luz no comprimento de onda do infravermelho-próximo para avaliar, de forma quantitativa e qualitativa, os componentes moleculares relacionadas à oxigenação tecidual. Baseado na relação das concentrações da deoxiemoglobina e da oxiemoglobina no tecido, a NIRS obtém informações para o cálculo da oxigenação tecidual. Embora possa ser aplicada em qualquer órgão, como método não invasivo é principalmente usada para a monitorização da oxigenação muscular periférica. Os parâmetros medidos pela NIRS podem ser calculados diretamente ou através de intervenções fisiológicas para alterar a circulação no local da aferição, sendo as mais usadas a oclusão arterial e a oclusão venosa. Deste modo, pode-se obter informações sobre a saturação do oxigênio muscular periférico e tecidual, bem como do fluxo sanguíneo e consumo de oxigênio local. Seu uso é direcionado principalmente para a monitorização da oxigenação tecidual periférica durante ressuscitação do choque no trauma e em pacientes sépticos, bem como a monitorização dos distúrbios da microcirculação regional. Esta revisão abordará os princípios físicos da espectroscopia no IV-próximo, e das principais aplicações clínicas deste instrumento de monitorização, com ênfase nos estudos que investigaram a utilidade da NIRS na área de terapia intensiva e também no setor de emergência clínica.Near infrared spectroscopy (NIRS is a non-invasive technique that allows determination of tissue oxygenation based on spectro-photometric quantitation of oxy- and deoxyhemoglobin within a tissue. This technique has gained acceptance as a tool to monitor peripheral tissue perfusion in critically ill patient. NIRS principle is based on

Memes da internet e a produtividade funcional: um argumento sistêmico-funcional e crítico-discursivo para a propagação dos fenômenos

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Jaime de Souza Júnior

2013-08-01

Full Text Available Neste estudo, pretendemos analisar avaliadores e avaliados, localizados via utilização da expressão memética “Que deselegante”. Para verificar, funcionalmente, como e quem/o que o usuário da expressão citada avalia, constituindo-se, assim, discursivamente, nos apoiaremos nos conceitos de Avaliatividade (MARTIN; WHITE, 2005; Dialogia e Alteridade (BAKHTIN, 1997. A funcionalidade será explorada via Linguística de Corpus (como metodologia. Extrairemos uma lista de palavras mais frequentes e listas de concordâncias baseadas em colocados, conforme Shepherd (2009, formados pelos seguintes padrões combinatórios: que deselegante + o/a/ isso, esse/a, este/ aquela/, ele/ela/, eu, você/vocês/, pessoas (eles/elas. Assim, objetivamos saber se, depois de adentrar a Internet, “Que deselegante” continuará sendo usada para avaliar ‘o outro’ via Julgamento de uma conduta (como na menção original, ou se a expressão revelará padrões de replicação novos e, consequentemente, graus de produtividade funcional, sugerindo-se, assim, uma nova característica constitutiva e perspectiva para o processo de replicação de memes da Internet.

Hardware reconfigurable para la reconstrucción de videos transmitidos por un mazo de fibras incoherente

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Pablo Montejo Valdés

2013-04-01

Full Text Available La transmisión de imágenes mediante mazos de fibras ópticas no coherentes (IOFB necesita información sobre la posición de cada fibra para ser usada en la reconstrucción de la imagen original. Otro importante requerimiento es poseer suficiente memoria para almacenar la imagen durante su reconstrucción y durante su retransmisión. La mayoría de las veces estos aspectos obligan el uso de memoria externa si se utilizan FPGAs en el sistema. Este trabajo presenta una solución a este problema. Se propone un sistema en un chip capaz de almacenar la información necesaria y las imágenes sobre las que se está trabajando usando un FPGA de bajo costo. Se presentan dos soluciones y se implementa la que resulta más ventajosa. Los resultados son discutidos. El uso de este método hace posible transmitir  video usando IOFB y reconstruir las imágenes originales casi en tiempo real, debido a su baja latencia. Esta propuesta podría utilizarse en sistemas autónomos sacando ventaja de su nivel de compactación, fiabilidad y bajo costo.

Uso das geotecnologias para a caracterização do parque estadual Dois Irmãos, Recife - PE

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Juliana Gomes Aragão

2015-12-01

Full Text Available As Unidades de Conservação vem se estabelecendo como uma estratégia imprescindível para a conservação de fragmentos de florestas e da biodiversidade. Devido a sua importância, ferramentas e pesquisas estão sendo cada vez mais desenvolvidas para permitir a atualização da paisagem e para o diagnóstico da situação dessas Unidades de Conservação. Aliado a isso, as geotecnologias estão sendo usadas como alternativas nos estudos ambientais, fornecendo meios para uma análise mais precisa e mais próxima do real. Nessa perspectiva, o objetivo do trabalho foi identificar e analisar as características físicas, topográficas e temáticas do Parque Estadual Dois Irmãos, localizado em Recife – PE, a partir da utilização de técnicas do geoprocessamento, aplicando recursos do software do Sistema de Processamento de Informações Georreferenciadas, o SPRING e o QUANTUM GIS e a utilização de imagens SRTM. Para isso foi realizado trabalho de campo para a captação das coordenadas geográficas de alguns itens do Parque, para a montagem do banco de dados e criação do mapa de estruturas físicas. Também foi utilizado as imagens SRTM para a construção do mapa da declividade e do mapa hipsométrico. Após a criação dos mapas identificou-se os tipos de relevo predominantes do Parque. Em relação à declividade 87% do relevo do Parque foi classificado entre Moderadamente Ondulado a Forte Ondulado e a sua altimetria variou de 0 a 105 metros. Diante dos resultados observados, o uso dos SIG’s e de dados SRTM, revelou-se como uma importante ferramenta empregada na identificação e espacialização prévia das unidades de relevo.

Determinación a través de pruebas aceleradas, de la vida útil del acabado para exteriores en madera de encino y pino

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R. Flores Velázquez

2001-01-01

Full Text Available La madera usada en exteriores requiere de productos que la protejan de la acción de los agentes de intemperismo y en algunos casos mejoren su apariencia. En los acabados que forman película se producen fallas de cohesión entre la madera y la película, terminando con un blanqueo y desprendimiento de ésta por la interacción de la radiación solar y la humedad. En este trabajo se probaron dos barnices poliuretanos de marca comercial para exteriores uno base agua y otro base solvente, aplicados sobre madera de encino y pino, utilizando la rueda de intemperismo acelerado (CTBA de Francia. De acuerdo con el fabricante de los barnices, cuando se alcanza un 10 % de falla en apariencia se requiere dar un rebarnizado. Los datos obtenidos se ajustaron con el modelo no lineal de distribución acumulativa de Weibull, para estimar el tiempo en el cual se alcanza el 10 % de falla ya mencionado. Tomando en cuenta que 2.25 horas de intemperismo acelerado en la rueda equivalen a un día de intemperismo natural bajo condiciones drásticas, se estimaron los tiempos a los cuales se debe aplicar un rebarnizado, siendo de 15.76 días para pino y de 76.21 días para encino cuando se barnizó con Hydroform, mientras que con el barniz 11000 éste fue de 544.26 días para pino y de 381.15 días para encino.

Ante situm liver resection with inferior vena cava replacement under hypothermic cardiopolmunary bypass for hepatoblastoma: Report of a case and review of the literature

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Roberta Angelico

2017-01-01

Conclusions: We report for the first time a case of ante situ liver resection and inferior-vena-cava replacement associated with hypothermic cardiopulmonary bypass in a child with hepatoblastoma. Herein, we extensively review the literature for hepatoblastoma with thumoral thrombi and we describe the technical aspects of ante situm approach, which is a realistic option in otherwise unresectable hepatoblastoma.

Eficiencia de una modificación de la prueba de Fraser para la alternativa de localización en el problema de muestra / Efficiency of a modification the Fraser's test for alternative location on the problem of sample

OpenAIRE

Hidalgo Troya, Arsenio

2009-01-01

Se propone una familia de pruebas de rangos para el problema de localización en una muestra, usando como función de puntajes, la función percentil de la Distribución Lambda Generalizada (DLG), extendiendo la idea de Fraser de la función puntajes normales. Se obtienen las expresiones de las eficacias de las pruebas propuestas como funciones de los parámetros de curtósis de la distribución usada como función de puntajes y de la distribución muestreada. Por medio de un estudio de simulación se m...

Atrophic inferior vena cava is a marker of chronicity of intra-filter and inferior vena cava thrombosis: based on CT findings.

Science.gov (United States)

Chen, Liang; Shi, Wanyin; Gu, Jianping; He, Xu; Lou, Wensheng

2018-04-11

A permanently indwelling filter in the inferior vena cava (IVC) may induce caval thrombosis, which could develop and evolve from an acute to a chronic phase. The differential diagnosis of acute and chronic thromboses determines the treatment strategy. The role of computed tomography (CT) in diagnosing acute and chronic intra-filter and IVC thromboses has not been well established. This retrospective study summarizes the CT signs that indicate acute and chronic phases of intra-filter and IVC thromboses. This study included eight patients who developed a lower-extremity deep venous thrombosis (DVT) and were treated with intracaval filter placement as an alternative to anticoagulation and thrombolysis. During the follow-up, all patients developed an intra-filter thrombosis in the IVC confirmed by CT and/or CT venography (CTV). Demographic and CT data of all patients during the follow-up period were collected for analysis. All patients had normal-appearing IVCs prior to filter placement, as shown on trans-femoral venography. Eight filters (five TrapEase, three OptEase) were placed in the eight IVCs, respectively. Subsequently, IVC-CT or CTV revealed acute intra-filter or IVC thrombosis in all eight patients, manifesting as an intracaval filling defect and thickened IVC wall. Filter protrusion and secondary caval atrophy seen on CT indicated a chronically occluded IVC. IVC thrombosis may result from filter placement. The chronicity of caval thrombotic occlusion is likely to be associated with filter protrusion and secondary IVC atrophy revealed on CT scans.

Distribucion hiperbolica generalizada: una aplicacion en la seleccion de portafolios y en cuantificacion de medidas de riesgo de mercado

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Jose Luis Alayon

2015-12-01

Full Text Available La distribución Hiperbólica Generalizada ha sido usada por académicos y profesionales para eliminar los problemas de colas de distribución delgadas en finanzas, y por su utilidad en la modelación de los retornos de los activos y de las medidas de riesgo de mercado. En este trabajo, la distribución hiperbólica generalizada es usada para encontrar el portafolio óptimo y su riesgo de mercado. Igualmente, se desarrolla un método para la Selección de Portafolio Robusto la cual reduce la sensibilidad del portafolio ante variaciones de los parámetros de la distribución. Luego de esto, se muestra un esquema comparativo para determinar cómo la inclusión del nuevo método representa un avance respecto a la teoría de selección de portafolios de Markowitz. Por último, en algunos gráficos se muestra el efecto de los parámetros sobre la forma de la distribución, lo que se usa para generar escenarios de estrés y portafolios óptimos.

Utilização Potencial do Lenho de Acacia melanoxylon: a Crescer em Povoamentos Puros ou Mistos com Pinus pinaster - pela Indústria Florestal Portuguesa

OpenAIRE

Santos, António; Teixeira, Andreia; Anjos, Ofélia; Simões, Rogério; Nunes, Lina; Machado, José S.; Tavares, Mário

2007-01-01

A Acacia melanoxylon R. Br. (acácia-austrália ou austrália) cresce bem em Portugal, em povoamentos puros ou mistos com Pinus pinaster Aiton, ainda que apresente fortes constrangimentos ecológicos e legais. Apesar de algumas dificuldades, por exemplo na secagem, a madeira de austrália é usada em mobiliário e produtos manufacturados devido, principalmente, à sua textura e cor escura. Pode também ser usada para pasta, sendo plantada em muitos países com esse propósito juntamente com Acacia mangi...

Bleeding 'downhill' esophageal varices associated with benign superior vena cava obstruction: case report and literature review.

Science.gov (United States)

Loudin, Michael; Anderson, Sharon; Schlansky, Barry

2016-10-24

Proximal or 'downhill' esophageal varices are a rare cause of upper gastrointestinal hemorrhage. Unlike the much more common distal esophageal varices, which are most commonly a result of portal hypertension, downhill esophageal varices result from vascular obstruction of the superior vena cava (SVC). While SVC obstruction is most commonly secondary to malignant causes, our review of the literature suggests that benign causes of SVC obstruction are the most common cause actual bleeding from downhill varices. Given the alternative pathophysiology of downhill varices, they require a unique approach to management. Variceal band ligation may be used to temporize acute variceal bleeding, and should be applied on the proximal end of the varix. Relief of the underlying SVC obstruction is the cornerstone of definitive treatment of downhill varices. A young woman with a benign superior vena cava stenosis due to a tunneled internal jugular vein dialysis catheter presented with hematemesis and melena. Urgent upper endoscopy revealed multiple 'downhill' esophageal varices with stigmata of recent hemorrhage. As there was no active bleeding, no endoscopic intervention was performed. CT angiography demonstrated stenosis of the SVC surrounding the distal tip of her indwelling hemodialysis catheter. The patient underwent balloon angioplasty of the stenotic SVC segment with resolution of her bleeding and clinical stabilization. Downhill esophageal varices are a distinct entity from the more common distal esophageal varices. Endoscopic therapies have a role in temporizing active variceal bleeding, but relief of the underlying SVC obstruction is the cornerstone of treatment and should be pursued as rapidly as possible. It is unknown why benign, as opposed to malignant, causes of SVC obstruction result in bleeding from downhill varices at such a high rate, despite being a less common etiology of SVC obstruction.

Análise das propagandas dos medicamentos isentos de prescrição veiculadas em revistas para prescritores na área médica

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Lais Danciguer Guanaes

2012-08-01

Full Text Available O presente artigo apresenta uma análise da qualidade das propagandas de medicamentos isentos de prescrição destinadas à classe médica, baseado na nova RDC no 96, de 17 de dezembro de 2008. Para análise coletou-se 16 fascículos da Revista Brasileira de Medicina (RBM a partir de agosto 2009 a dezembro de 2010. Para averiguação da qualidade, elaborou-se um questionário dividido em três partes. Ao todo 160 peças publicitárias foram encontradas, em que 27 delas eram referentes aos medicamentos isentos de prescrição, contemplando nove indústrias farmacêuticas. Observou-se que nenhuma das peças publicitárias cumpriu na íntegra as novas regras exigidas na legislação vigente (RDC 96/08, apresentando infrações desde identificação da mesma até as proibições de figuras humanas e mensagens subjetivas. Portanto, concluiu-se que: há necessidade de implantação de um instrumento mais efetivo de fiscalização, a fim de melhorar à qualidade das propagandas para poderem ser usadas como fonte fidedigna de informação e atualização aos prescritores.

Segmental variants of the inferior vena cava - typical findings correlated with embryological development for differential diagnosis

International Nuclear Information System (INIS)

Meyer, D.R.; Huggle, H.; Hueppe, T.; Friedrich, M.; Andresen, R.

2001-01-01

The vast variability of the overall rare congenital anomalies of the inferior vena cava (IVC) are mostly detected by accident through different imaging modalities. These cannot be classed as pathological findings, and should not be confused with lymphomas and has to differ from secondary collateral venous pathways. Based on 656 CT examinations 10.5% known forms of IVC anomalies were found. According to the embryological development three main groups of IVC variants could be nosologically classified: agenesis of the suprarenal IVC, anomalies of the pars renalis and anomalies of the infrarenal IVC. Additionally three unusual anomaly complexes were found. For the understanding details of the embryology based on a simplified depiction are presented. (orig.) [de

CT Findings of Intrarenal Yolk Sac Tumor with Tumor Thrombus Extending into the Inferior Vena Cava: A Case Report

Energy Technology Data Exchange (ETDEWEB)

Lin, Shao Chun; Li, Xue Hua; Sun, Can Hui; Feng, Shi Ting; Peng, Zhen Peng; Huang, Si Yun; Li, Zi Ping [Dept. of Radiology, The First Affiliated Hospital, Sun Yat-Sen University, Guangzhou (China)

2014-10-15

Yolk sac tumor (YST) is a rare germ cell neoplasm of childhood that usually arises from the testis or ovary. The rare cases of YST in various extragonadal locations have been reported, but the primary intrarenal YST is even more uncommon. Here, we report a case of a primary intrarenal YST with tumor thrombus of the inferior vena cava and left renal vein in a 2-year-old boy, with an emphasis on the CT features. To our knowledge, this is the first reported case of an intrarenal YST with intravascular involvement.

Are too many inferior vena cava filters used? Controversial evidences in different clinical settings: a narrative review.

Science.gov (United States)

Dalla Vestra, Michele; Grolla, Elisabetta; Bonanni, Luca; Pesavento, Raffaele

2018-03-01

The use of inferior vena cava filters to prevent pulmonary embolism is increasing mainly because of indications that appear to be unclearly codified and recommended. The evidence supporting this approach is often heterogeneous, and mainly based on observational studies and consensus opinions, while the insertion of an IVC filter exposes patients to the risk of complications and increases health care costs. Thus, several proposed indications for an IVC filter placement remain controversial. We attempt to review the proof on the efficacy and safety of IVC filters in several "special" clinical settings, and assess the robustness of the available evidence for any specific indication to place an IVC filter.

Vertebral uptake of Tc-99m macroaggregated albumin (MAA) with SPECT/CT occurring in superior vena cava obstruction

Energy Technology Data Exchange (ETDEWEB)

Karls, Shawn; Hassoun, Hani; Derbekyan, Vilma [Dept. of Nuclear Madicine, Royal Victoria Hospital, Montreal (Canada)

2016-09-15

A 67-year-old male presented with dyspnea for which lung scintigraphy was ordered to rule out pulmonary embolus. Planar images demonstrated abnormal midline uptake of Tc-99m macroaggregated albumin, which SPECT/CT localized to several thoracic vertebrae. Thoracic vertebral uptake on perfusion lung scintigraphy was previously described on planar imaging. Radionuclide venography and contrast-enhanced CT subsequently demonstrated superior vena cava (SVC) obstruction with collateralization through the azygous/hemiazygous system and vertebral venous plexus. SPECT/CT differentiated residual esophageal/tracheal ventilation activity, a clinically insignificant finding, from vertebral uptake indicative of SVC obstruction, a potentially life-threatening condition.

El eterno dilema del modelo económico para México: visión de la ruralidad

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Tomás Martínez-Saldaña

2013-01-01

Full Text Available El presente es un ejercicio de reflexión sobre el desarrollo rural en México. El objetivo ha sido destacar elementos primordiales en las políticas usadas en contra y a favor de los campesinos, algunas de las cuales son de carácter populista. Se enfatizó en cómo el populismo ha servido de práctica y de ideología para la acción del estado. Existe una vasta literatura al respecto que se justifica al haber sido México el primer país latinoamericano en tener una revolución agraria en 1910. Se resalta la impronta que ha dejado esta línea de pensamiento en la historia reciente de México y las formas que ha tomado de acuerdo a intereses políticos coyunturales. Su persistencia a pesar del agresivo giro de las políticas liberales se explica por la naturaleza de las raíces que lo sustentan.

Reconstrucción 3D usando superficies trianguladas dados contornos paralelos

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Manuel Guillermo Forero

2001-07-01

Full Text Available El presente artículo muestra una técnica de triangulación empleada para la reconstrucción de superficies tridimensionales (3D a partir de contornos paralelos. Esta técnica es usada para el modelamiento de la cabeza y el cerebro a partir de imágenes de resonancia magnética (IRM.

Coleta de lavado gástrico para diagnóstico de tuberculose pulmonar infantil: revisão sistemática Colecta de lavado gástrico para diagnóstico de tuberculosis pulmonar infantil: revisión sistemática Gastric lavage in the diagnosis of pulmonary tuberculosis in children: a systematic review

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Ethel Leonor Noia Maciel

2010-08-01

Full Text Available OBJETIVO: Analisar a padronização da coleta do lavado gástrico para diagnóstico de tuberculose em crianças. MÉTODOS: Estudo de revisão sistemática referente aos anos de 1968 a 2008. O levantamento de artigos científicos foi feito nas bases de dados Lilacs, SciELO e Medline, utilizando-se a estratégia de busca ("gastric lavage and tuberculosis" ou "gastric washing and tuberculosis", com o limite "crianças com idade até 15 anos"; e "gastric lavage and tuberculosis and childhood" ou "gastric washing and tuberculosis and childhood". A análise dos 80 artigos recuperados baseou-se nas informações sobre o protocolo de coleta de lavado gástrico para diagnóstico da tuberculose em crianças: preparo da criança e horas de jejum, horário da coleta, aspiração do resíduo gástrico, volume total aspirado, solução usada para aspiração do conteúdo gástrico, solução descontaminante, solução tampão, e tempo de encaminhamento das amostras para o laboratório. Desses, foram selecionados 14 artigos após análise criteriosa. RESULTADOS: Nenhum artigo explicava detalhadamente todo o procedimento. Em alguns artigos não constavam: quantidade de aspirado gástrico, aspiração antes ou após a instilação de uma solução, solução usada na aspiração gástrica, solução tampão utilizada, tempo de espera entre coleta e processamento do material. Esses resultados mostram inconsistências entre os protocolos de coleta de lavado gástrico. CONCLUSÕES: Embora este seja um método secundário no Brasil, reservado a casos que não alcançaram pontuação diagnóstica pelo sistema preconizado pelo Ministério da Saúde, é necessário padronizar a coleta de lavado gástrico para diagnóstico de tuberculose pulmonar na infância.OBJETIVO: Analizar la estandarización de la colecta del lavado gástrico para diagnóstico de tuberculosis en niños. MÉTODOS: Estudio de revisión sistemático referente a los años de 1968 a 2008. El

Incidental Finding of Inferior Vena Cava Atresia Presenting with Deep Venous Thrombosis following Physical Exertion

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Shalini Koppisetty

2015-01-01

Full Text Available Inferior vena cava atresia (IVCA is a rare but well described vascular anomaly. It is a rare risk factor for deep venous thrombosis (DVT, found in approximately 5% of cases of unprovoked lower extremity (LE DVT in patients <30 years of age. Affected population is in the early thirties, predominantly male, often with a history of major physical exertion and presents with extensive or bilateral DVTs. Patients with IVC anomalies usually develop compensatory circulation through the collateral veins with enlarged azygous/hemizygous veins. Despite the compensatory circulation, the venous drainage of the lower limbs is often insufficient leading to venous stasis and thrombosis. We describe a case of extensive and bilateral deep venous thrombosis following physical exertion in a thirty-six-year-old male patient with incidental finding of IVCA on imaging.

PLANTAS USADAS POR UNA COMUNIDAD INDÍGENA COREGUAJE EN LA AMAZONÍA COLOMBIANA

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Trujillo William

2010-06-01

Full Text Available Se presentan las plantas útiles en una comunidad indígena Coreguaje del alto Caquetá en la Amazonía colombiana. Con la participación de diez conocedores indígenas, se realizaron recorridos de manera independiente en áreas de montaña (= bosque secundario, rastrojos, huertos habitacionales, chagras y potreros, del resguardo Gorgonia, municipio de Milán. Se registraron los nombres vernáculos y los usos de las plantas, los cuales se clasifi caron en trece categorías. A partir del Valor de Uso (VU (empleando la metodología de usos totalizados y Valores de Preferencia(VP, se identifi caron las especies de mayor importancia para la comunidad yse probó la diferencia en los VP a plantas medicinales de dos conocedores. Sepresenta información etnobotánica para 171 especies (137 géneros en 67 familias.Las categorías de uso medicinal (72 spp., construcción (38 spp. y alimento (33spp. fueron las más importantes. El VU depende de la abundancia en la montaña(r = 0.388, p = 0.001, n = 65; 72% de las 90 especies arbóreas (DAP ≥ 10 cmhalladas en 0.2 ha de montaña son empleadas por lo menos en una de las categoríasde uso, principalmente para construcción, aserrío y alimento. El espacio de usomás valorado fue la montaña con 76 especies útiles. Siparuna decipiens, Socrateaexorrhiza, Wittmackanthus stanleyanus y Vismia sp., fueron las plantas con mayorVU (3 mientras que el VP más alto fue registrado para Rauvolfi a leptophylla.Se recomienda la elaboración de planes de conservación para esta especie porestar sufriendo disminución de su hábitat en el área de estudio y por ser rara enla Amazonía colombiana. No existe diferencia signifi cativa (p>0.05 entre los VPa las plantas medicinales de los dos médicos tradicionales, sugiriendo que ambosconocedores conforman un sistema común de conocimiento etnomédico.Palabras clave.

Braile vena cava filter and greenfield filter in terms of centralization.

Science.gov (United States)

de Godoy, José Maria Pereira; Menezes da Silva, Adinaldo A; Reis, Luis Fernando; Miquelin, Daniel; Torati, José Luis Simon

2013-01-01

The aim of this study was to evaluate complications experienced during implantation of the Braile Vena Cava filter (VCF) and the efficacy of the centralization mechanism of the filter. This retrospective cohort study evaluated all Braile Biomédica VCFs implanted from 2004 to 2009 in Hospital de Base Medicine School in São José do Rio Preto, Brazil. Of particular concern was the filter's symmetry during implantation and complications experienced during the procedure. All the angiographic examinations performed during the implantation of the filters were analyzed in respect to the following parameters: migration of the filter, non-opening or difficulties in the implantation and centralization of the filter. A total of 112 Braile CVFs were implanted and there were no reports of filter opening difficulties or in respect to migration. Asymmetry was observed in 1/112 (0.9%) cases. A statistically significant difference was seen on comparing historical data on decentralization of the Greenfield filter with the data of this study. The Braile Biomédico filter is an evolution of the Greenfield filter providing improved embolus capture and better implantation symmetry.

Infra-renal angles, entry into inferior vena cava and vertebral levels of renal veins.

Science.gov (United States)

Satyapal, K S

1999-10-01

Current norms for renal vasculature hold true in only half the population. Standard textbooks perpetuate old misconceptions regarding renal venous anatomy. This study is aimed to determine left and right infra-renal angles (L-IRA, R-IRA); entry level of renal veins into the inferior vena cava (IVC), and height of IVC under renal vein influence; and their vertebral level. One hundred morphologically normal en-bloc renal specimens randomly selected from post-mortem examinations were dissected and resin casted. IRA were also measured from venograms of 32 adult and 11 foetal cadavers, as were vertebral entry levels. IRA measurements (degrees) were as follows: left, 55 degrees +/- 16 degrees (20 degrees -102 degrees ); right, 60 degrees +/- 17 degrees (10 degrees -93 degrees ). Left vein entered IVC higher than right 54%, lower 36%, and opposite each other 10%. Vertical distance between lower borders of veins was 1.0 +/- 0.9 cm. Vertical distance of IVC under renal vein influence was 2.3 +/- 1.0 cm. Vertebral level of veins in adults lies between TI2-L2. In foetuses, IRA was as follows: left, 65 degrees +/- 12 degrees (45 degrees -90 degrees ); right, 58 degrees +/- 7 degrees (40 degrees -70 degrees ); vertebral level between T12 and L3. Similar IRA values from literature noted on right, 51 degrees (26 degrees -100 degrees ); differences on left, 77 degrees (43 degrees -94 degrees ), clearly differing from Williams et al. (Gray's Anatomy, 37(th) ed, 1989) statement that renal veins "open into the inferior vena cava almost at right angles." Large variations of IRA are not surprising since kidneys are considered normally "floating viscera," varying position with posture and respiratory movement as well as in live vs. cadaveric subjects. The entry level into the IVC also differs from Williams et al. This study uniquely quantitated actual height difference between lower borders of left and right veins. The data presented appears to be the first documentation of vertebral

Different commercial yeast strains affecting the volatile and sensory profile of cava base wine.

Science.gov (United States)

Torrens, Jordi; Urpí, Pilar; Riu-Aumatell, Montserrat; Vichi, Stefania; López-Tamames, Elvira; Buxaderas, Susana

2008-05-10

36 semi-industrial fermentations were carried out with 6 different yeast strains in order to assess differences in the wines' chemical and volatile profile. Two of the tested strains (Y3 and Y6) showed the fastest fermentation rates throughout 3 harvests and on 2 grape varieties. The wines fermented by three of the tested strains (Y5, Y3 and Y4) stand out for their high amounts of esters and possessed the highest fruity character. Wines from strains producing low amounts of esters and high concentrations of medium chain fatty acids, higher alcohols and six-carbon alcohols were the least appreciated at the sensory analysis. The data obtained in the present study show how the yeast strain quantitatively affects the final chemical and volatile composition of cava base wines and have repercussions on their sensory profile, independently of must variety and harvest year.

An experimental and computational study of the inferior vena cava hemodynamics under respiratory-induced collapse of the infrarenal IVC.

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Tedaldi, Elisabetta; Montanari, Chiara; Aycock, Kenneth I; Sturla, Francesco; Redaelli, Alberto; Manning, Keefe B

2018-04-01

Inferior vena cava (IVC) filters have been used for over five decades as an alternative to anticoagulation therapy in the treatment of venous thromboembolic disease. However, complications associated with IVC filters remain common. Though many studies have investigated blood flow in the IVC, the effects of respiration-induced IVC collapse have not been evaluated. Our hypothesis is that IVC collapse may have an influence on IVC filter performance. Therefore, we herein investigate the hemodynamics in uncollapsed and collapsed IVC configurations using in vitro flow experiments and computational simulations. Particle image velocimetry (PIV) is used to measure the hemodynamics in an idealized, compliant model of the human IVC made of silicone rubber. Flow is studied under uncollapsed and collapsed scenarios, with the minor diameter of the IVC reduced by 30% in the collapsed state. Both rest and exercise flow conditions are investigated, corresponding to suprarenal flow rates of 2 lpm and 5.5 lpm, respectively. Finite element analysis simulations are carried out in a computational model of the undeformed, idealized IVC to reproduce the 30% collapse configuration and an additional 50% collapse configuration. Computational fluid dynamics (CFD) simulations are then performed to predict the flow in the uncollapsed and collapsed scenarios, and CFD results are compared to the experimental data. The results show that the collapsed states generate a higher velocity jet at the iliac junction that propagates farther into the lumen of the vena cava in comparison to the jet generated in the uncollapsed state. Moreover, 50% collapse of the IVC causes a shift of the jet away from the IVC wall and towards the center of the vena cava lumen. The area of maximum wall shear stress occurs where the jet impacts the wall and is larger in the collapsed scenarios. Secondary flow is also more complex in the collapsed scenarios. Interestingly, this study demonstrates that a small variation in

Uso de cosméticos por mulheres do município de Esperança, Paraíba, Brasil

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Alexsandra Conceição Apolinário

2013-08-01

Full Text Available O aumento de vendas de produtos cosméticos e de higiene pessoal deve ser atentamente acompanhado pelos setores regulatórios competentes, uma vez que mais de oito mil matérias-primas são usadas na formulação destes produtos e muitas podem ocasionar efeitos adversos tóxicos ou mesmo alergias. Assim, este trabalho visou investigar quais as finalidades do uso de cosméticos entre mulheres, conhecer os mais utilizados e saber os locais de aquisição destes produtos. Tratouse de um estudo transversal, descritivo e exploratório, tendo como instrumento de coleta de dados um questionário com perguntas objetivas, aplicado entre 102 mulheres. A higiene (65,7% foi respondida como a principal finalidade de uso. Os produtos com maior frequência de utilização foram os perfumes e desodorantes (90,2%, maquiagens (74,5%, produtos para depilação (74,5% e tinturas de cabelos (41,2%. A maior parte das mulheres (63,7% relatou comprar os cosméticos em revistas. Diante dos resultados expostos, pode-se inferir que as mulheres utilizam variados tipos de cosméticos, com diferentes finalidades, o que pode implicar em risco para saúde.

Cognitive behavioral therapy for bipolar disorders

OpenAIRE

Lotufo Neto, Francisco

2004-01-01

Descrição dos objetivos e principais técnicas da terapia comportamental cognitiva usadas para a psicoterapia das pessoas com transtorno bipolar.Objectives and main techniques of cognitive behavior therapy for the treatment of bipolar disorder patients are described.

Algunas citas recientes de especies del género Phoma Sacc. en Catalunya

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Nadal i Puigdefabregas, Martí

1991-01-01

Se citan 14 táxones del género Phoma (Ph. cava, Ph. epicoccinu, Ph. exigua, Ph.exigua var. foveata, Ph. glomerata, Ph. hedericola, Ph. herbarum, Ph. jolyana, Ph. leveillei, Ph. lycopersici, Ph. macrostoma, Ph. medicaginis var. pinodella, Ph. pomorum y Ph.tracheiphila). Para cada uno de los táxones se indica la fecha de recolección y la especie vegetal sobre la cual se desarrollaba. On cite 14 taxons du genre Phoma (Ph. cava, Ph. epicoccina, Ph. exigua, Ph.exigua var. foveata, Ph. glomerata...

A GRASP METAHEURISTIC FOR THE ORDERED CUTTING STOCK PROBLEM UN META-HEURÍSTICO GRASP PARA EL PROBLEMA DE STOCK DE CORTE ORDENADO

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Rodrigo Rabello Golfeto

2008-12-01

Full Text Available This study presents a new mathematical model and a Greedy Randomized Adaptive Search Procedure (GRASP meta-heuristic to solve the ordered cutting stock problem. The ordered cutting stock problem was recently introduced in literature. It is appropriate to minimize the raw material used by industries that deal with reduced product inventories, such as industries that use the just-in-time basis for their production. In such cases, classic models for solving the cutting stock problem are useless. Results obtained from computational experiments for a set of random instances demonstrate that the proposed method can be applied to large industries that process cuts on their production lines and do not stock their products.Este estudio presenta un nuevo modelo matemático y un procedimiento meta-heurístico de búsqueda voraz adaptativa y aleatoria (GRASP, por sus siglas en inglés para resolver el problema de stock de corte ordenado. Éste problema ha sido introducido recientemente en la literatura. Es apropiado minimizar la materia prima usada por las industrias que manipulan inventarios reducidos de productos, tales como las industrias que usan la base justo a tiempo para su producción. En tales casos, los modelos clásicos para resolver el problema de stock de corte ordenado son inútiles. Los resultados obtenidos, mediante experimentos computacionales para un conjunto de ejemplos aleatorios, demuestran que el método propuesto puede ser aplicado a industrias grandes que procesan cortes en sus líneas de producción y no mantienen en stock sus productos.

CRESCIMENTO DA PARTE AÉREA DE MUDAS DE COUVE-FLOR PRODUZIDAS EM DIFERENTES SUBSTRATOS EM SISTEMA AGROECOLÓGICO

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Julio Cesar Gradice Saluci

2017-04-01

Full Text Available A agricultura exerce grande expressividade no desenvolvimento social, político e econômico do Brasil. Contudo existe constate crescimento na procura e exigência por alimentos mais saudáveis, que podem ser produzidos com técnicas da agroecologia. Objetivou-se com este trabalho avaliar diferentes substratos na produção de mudas de couve-flor. O experimento foi em DIC, no esquema fatorial (4x4 avaliando 7 plantas em cada tratamento na fase final de mudas. Os resultados encontrados para a parte aérea, demostraram desenvolvimento satisfatório para a cultura nos substratos orgânicos, em relação ao comercial, sendo que foi observado superioridade das variáveis quando utilizou-se o vermicomposto como substrato, independente das concentrações usadas, entretanto não houve diferença entre as concentrações usadas para esse substrato. Os substratos orgânicos proporcionaram boa produção. Dentre estes substratos destacou-se o vermicomposto.

ETNOBOTÂNICA COMO FERRAMENTA PARA IDENTIFICAÇÃO DE INDICAÇÕES GEOGRÁFICAS E MARCAS COLETIVASEM COMUNIDADE DA REGIÃO SERRANA DO RIO DE JANEIRO

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Odara Horta Boscolo

2015-03-01

Full Text Available A Etnobotânica estuda as sociedades humanas e suas interações culturais e simbólicas com as plantas. Indicação Geográfica (IG é um tipo de proteção que reflete o esforço coletivo de defesa e gestão dos direitos de propriedade intelectual. Marca Coletiva (MC é utilizada para identificar produtos ou serviços provindos de membros de uma determinada entidade. As IG e as MC podem ser usadas ​​como ferramentas estratégicas para diferenciar e proteger os ativos intangíveis por meio de produtos de propriedade intelectual gerados por comunidades locais no mercado, agregando valor a sua cultura e meio ambiente, oferecendo ao consumidor um sinal distintivo da sua tipicidade. A pesquisa etnobotânica foi realizada em uma comunidade rural no estado do Rio de Janeiro. Foi sugerida a possibilidade de proteção da Indicação Geográfica "Rio Bonito de Cima de Friburgo" para o inhame, seus métodos de produção e uma MC para a Oficina das Ervas. Estas proposições auxiliam na manutenção e criação de postos de trabalho como uma possibilidade de compartilhar os benefícios econômicos para toda a cadeia produtiva e indiretamente estimular outras atividades rentáveis, como o ecoturismo. Assim, etnobotânica destaca-se como uma ferramenta de pesquisa para indicar potenciais produtos e serviços que podem ser protegidos com IG ou MC e representa mais uma oportunidade de um retorno à comunidade pelo estudo realizado.

Colapsibilidade da Veia Cava Inferior e sinais e sintomas de insuficiência cardíaca: novos insights e possíveis associações

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Renato De Vecchis

2012-06-01

Full Text Available FUNDAMENTO: Nos pacientes com Insuficiência Cardíaca Crônica (ICC foram propostas medidas ultrassonográficas do Índice de Colapsibilidade da Veia Cava Inferior (ICVCI para obter uma avaliação e classificação minuciosa da congestão hemodinâmica. OBJETIVO: A finalidade deste estudo era correlacionar os achados no exame físico com o ICVCI em pacientes com ICC. MÉTODOS: De acordo com um projeto de coorte retrospectivo, analisamos 54 pacientes com ICC, direita ou biventricular, classe NYHA III. O plano era determinar se alguma faixa de ICVCI basal poderia predizer uma persistência ou agravamento da congestão clínica achada no final do acompanhamento subsequente (isto é, após 1-2 meses do tratamento oral otimizado. Para essa finalidade, os pacientes foram subdivididos em três grupos de acordo com o valor de ICVCI basal: ≤ 15% (13 pts, 16 - 40% (21 pts e > 40% (20 pts. Diversos critérios clínicos de congestão foram comparados por meio dos três grupos e incorporados subsequentemente ao modelo multivariado de Cox. RESULTADOS: Preditores multivariados de alto escore de congestão foram distensão da veia jugular (FC: 13,38 95% IC: 2,13 - 84 p = 0,0059 e estertores (FC: 11 95% C.I : 1,45 - 83,8 p = 0,0213. O ICVCI ≤ 15% esteve sempre associado com um alto escore de congestão na segunda visita; todavia, o ICVCI o ≤ 15% não predisse um alto escore de congestão na segunda visita. CONCLUSÃO: No âmbito da ICC, um baixo ICVCI não predisse, em forma confiável, um elevado escore de congestão. Não obstante, o conjunto com ICVCI ≤ 15% sempre se achou associado com sinais e sintomas de uma ICC descompensada, tanto do lado direito como do esquerdo. (Arq Bras Cardiol. 2012; [online].ahead print, PP.0-0

Actions in the electrical sector to propitiate the environmental protection; Acciones en el sector electrico para propiciar la proteccion ambiental

Energy Technology Data Exchange (ETDEWEB)

Trevino Gaspari, Mateo [Fideicomiso de Ahorro de Energia (FIDE) (Mexico)

1997-07-01

The saving of electrical energy is one of the most efficient means to propitiate the environmental protection in the surroundings of the facilities used in the production of electrical energy. The emission of polluting agents associated with the electric power generation is analyzed, among them, CO{sub 2}, SO{sub 2} and NO{sub 2}, along with the particulate emission of ash or soot. In addition, an analysis is made of the contribution of the electrical energy saving to the environmental protection and the actions that the Comision Federal de Electricidad of Mexico will undertake on the electric energy saving for the 1995 to the 2000 period. [Spanish] El ahorro de energia electrica es uno de los medios mas eficientes para propiciar la proteccion ambiental en el entorno de las instalaciones usadas en la produccion de energia electrica. Se analiza la emision de contaminantes asociados con la generacion electrica, entre ellos, el CO{sub 2}, el SO{sub 2} y NO{sub 2}, junto con la emision de particulas de ceniza o de hollin. Ademas se analiza la contribucion del ahorro de energia electrica a la proteccion ambiental y las acciones que emprendera la Comision Federal de Electricidad de Mexico sobre ahorro de energia electrica para el periodo 1995 al 2000.

[Extracorporeal circulation and hypothermy surgery in tumors with vena cava extension: 20 years experience at the University Clinic of Navarra].

Science.gov (United States)

Rioja Zuazu, J; Rodríguez-Rubio Cortadillas, F; Zudaire Bergera, J J; Saiz Sansi, A; Rosell Costa, D; Robles García, J E; Rábago, G; Berián Polo, J M

2008-04-01

We present our 20 years experience treating patients with vena cava extension in whom an extracorporeal circulation, hypothermia, cardio circulatory arrest (ECC-H-CCA) in order to perform, together with a tumoral resection, a thrombus resection. From 1985 to 2005 a total of 28 retroperitoneal tumor were treated: 25 renal cancers, a Wilms tumor, a paratesticular rabdomiosarcoma, and a pheocromocitoma. All of them had an extension by means of thrombus above the suprahepatics veins. All of them were treated by means of ECC-H-CCA for thrombus extraction. A descriptive study of the serie is performed as well as a Kaplan Meyer survival study. Surgical complications were present within 10 patients (35%), with a surgical mortality of two patients (7%): one intra-operatively because a massive embolism of the lungs and the other because of a lung embolism on the 4th post-operative day. Global actuarial survival was 29.1+/-10% at three years and 17.5+/-8% at five years. Analyzing only who do not have metastatic lesions, nor lymph nodes at diagnosis their three year survival was 50.9+/-16.3% and 32.2+/-16% at five years. Mean while those who have any metastatic lesion at diagnosis their three and five years survival was 20.8+/-12% and 10.4+/-9% respectively. The employ of surgical techniques with ECC-H-CCA with in oncological pathology associated with vena cava thrombus is justified and its employment does not worsen the survival; it is indicated because its results, allowing a complete tumoral resection in a safe and reproducible fashion.

Campo eletromagnético de uma carga em queda livre num campo gravitacional uniforme

OpenAIRE

Goto, Mario

2010-01-01

As transformações de Rindler são usadas para obter o campo eletromagnético de uma carga em queda livre num campo gravitacional uniforme. Electromagnetic field of free falling charge in an uniform gravitational field is obtained using Rindler transformations.

A semi-nested PCR assay for molecular detection of Paracoccidioides brasiliensis in tissue samples Semi-nested PCR para a detecção molecular de Paracoccidioides brasiliensis em amostras de tecido

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Andrea Cristine Koishi

2010-12-01

Full Text Available INTRODUCTION: Paracoccidioidomycosis is a systemic infection caused by Paracoccidioides brasiliensis. METHODS: In this study, a semi-nested PCR for paracoccidioidomycosis diagnosis was developed. The primers ITS1 and ITS4 were used in the first reaction, while the primers MJ03 and ITS1 primer were used in the second reaction. The semi-nested PCR was used to investigate biopsies of five patients with oral lesions that resembled paracoccidioidomycosis. RESULTS: The semi-nested PCR was positive for four samples and negative for a sample from a patient later diagnosed with leishmaniasis. CONCLUSIONS: The new semi-nested PCR describe is useful for paracoccidioidomycosis diagnosis.INTRODUÇÃO: A paracoccidioidomicose é uma infecção sistêmica causada pelo Paracoccidioides brasiliensis. MÉTODOS: Neste estudo, uma semi-nested PCR foi desenvolvida para o diagnóstico da paracoccidioidomicose. Os oligonucleotídeos iniciadores ITS1 e ITS4 foram usados na primeira reação, enquanto os oligonucleotídeos iniciadores MJ03 e ITS1 foram usados na segunda reação. A semi-nested PCR foi usada para investigar biopsias de cinco pacientes com lesões orais que se assemelhavam a paracoccidioidomicose. RESULTADOS: A semi-nested PCR foi positiva para quatro amostras e negativa para a amostra de um paciente, posteriormente diagnosticado com leishmaniose. CONCLUSÕES: A semi-nested PCR descrita aqui é útil para o diagnóstico da paracoccidioidomicose.

Multi-slice spiral CT multiplanar reconstruction findings of localized fat collection adjection to the subdiaphragmatic inferior vena cava

International Nuclear Information System (INIS)

Cao Hetao; Lu Jian; Zhao Jinli; Liu Tingting; Qin Jufeng; Xu Wen; Qin Jiangchun; Jiang Junkang

2012-01-01

Objective: To discusses the MSCT multiplanar reconstruction manifestation (MPR) of localized fat collection adjection to subdiaphragmatic inferior vena cava (IVC fat ). Methods: The thoracic and abdominal MSCT scan data of 8246 patients were browsed,45 patients with presumed IVC fat on axial CT scans were further studied prospectively with MSCT MPR. The predisposing position of IVC fat and its relationship with IVC were observed. It was divided into two kinds of intraluminal type and extraluminal type according to the angle of IVC fat with respect of the wall of IVC.The other 50 patients without IVC fat were randomly selected as the control group. The sagittal inclination angle (SIA) and diameter ratio (DR) between supra- and sub-diaphragmatic IVC between the two groups were compared by using t test. Results: The detection rate was 0.55% (45/8246). Of which hepatic vein lacuna 8 patients, subdiaphragmatic gap medial to IVC 28 patients and IVC groove 9 patients. The shape of IVC fat showed mainly for the round, oval and crescents on axial CT scans, of 15 patients intraluminal type, 4 showed 'target signs'. The shape of IVC fat showed mainly for 'half-moon' at MPR.The SIA and DR at IVC fat group were 21.62° ± 8.42° and 2.01 ±0.84 respectively, at control group were 16.75° ±7.82° (t=1.594, P>0.05) and 1.31 ±0.28 (t=2.341, P<0.05) respectively. Conclusion: The round, oval or half of limited fat density shadow adjection to subdiaphragmatic inferior vena cava which similar to in the lumen is the characteristic performance of IVC fat , it may be an anatomical variation. (authors)

GERENCIAMENTO DOS FLUXOS DE INFORMAÇÃO COMO REQUISITO PARA A PRESERVAÇÃO DA MEMÓRIA ORGANIZACIONAL: UM DIFERENCIAL COMPETITIVO

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Natália Marinho do Nascimento

2016-01-01

Full Text Available Os ambientes organizacionais estão em constante mudança, são dinâmicos e de grande complexidade. Além disso, esses ambientes são compostos por fluxos informacionais que necessitam de gerenciamento, porquanto propiciam condições para que as organizações desenvolvam diferenciais competitivos. Diante disso, entender a importância que a informação e o conhecimento representam nesse contexto, se faz essencial. Nessa perspectiva, a memória organizacional torna-se um elemento crucial para a preservação da memória organizacional, uma vez que pode evitar o retrabalho, bem como embasar as decisões em informações retrospectivas, ou seja, decisões baseadas em informações e conhecimentos tomadas anteriormente no contexto organizacional. O objetivo deste trabalho é evidenciar a importância da preservação da memória organizacional, a fim de desenvolver e aprimorar as ações informacionais diretamente ou indiretamente relacionadas a constituição da memória organizacional. Nessa perspectiva, utilizou-se a pesquisa bibliográfica de natureza qualitativa para analisar os fenômenos relacionados a referida temática. Ressalta-se que o gerenciamento dos fluxos informacionais, por meio da gestão da informação (que atua no âmbito dos fluxos formais ou estruturados e a gestão do conhecimento (que atua no âmbito dos fluxos informais ou não estruturados são indispensáveis para as organizações e se constituem em pré-requisito para que a preservação da memória organizacional possa ser usada como um diferencial competitivo.

Transfemoral Filter Eversion Technique following Unsuccessful Retrieval of Option Inferior Vena Cava Filters: A Single Center Experience.

Science.gov (United States)

Posham, Raghuram; Fischman, Aaron M; Nowakowski, Francis S; Bishay, Vivian L; Biederman, Derek M; Virk, Jaskirat S; Kim, Edward; Patel, Rahul S; Lookstein, Robert A

2017-06-01

This report describes the technical feasibility of using the filter eversion technique after unsuccessful retrieval attempts of Option and Option ELITE (Argon Medical Devices, Inc, Athens, Texas) inferior vena cava (IVC) filters. This technique entails the use of endoscopic forceps to evert this specific brand of IVC filter into a sheath inserted into the common femoral vein, in the opposite direction in which the filter is designed to be removed. Filter eversion was attempted in 25 cases with a median dwell time of 134 days (range, 44-2,124 d). Retrieval success was 100% (25/25 cases), with an overall complication rate of 8%. This technique warrants further study. Copyright © 2017 SIR. Published by Elsevier Inc. All rights reserved.

Interventional therapy and complications after liver transplantation: the obstruction of the hepatic vein and inferior vena cava

International Nuclear Information System (INIS)

Li Linsun; Shi Haibing; Zhao Linbo

2009-01-01

The occurrence rate of the obstruction of the hepatic vein or the inferior vena cava is very low. Obstruction can develop acutely as a result of technical problems or can present itself much later after the transplantation due to intimal hyperplasia or perianastomotic fibrosis. Clinically, the common presentations include hepatic dysfunction, liver engorgement, ascites, abdominal pain, etc. Percutaneous endovascular treatment with balloon dilation or stent placement is a safe and effective alternative treatment, which can keep the vessels open for a long period of time. Angioplasty can achieve technical success in restoring anastomotic patency almost to 100% of cases, but, unfortunately, restenosis occurs frequently. For, adult patients or pediatric patients with adult-sized hepatic veins, stenting seems to be the optimal choice. (authors)

Renal sinus fat invasion and tumoral thrombosis of the inferior vena cava-renal vein: only confined to renal cell carcinoma.

Science.gov (United States)

Acar, Turker; Harman, Mustafa; Guneyli, Serkan; Sen, Sait; Elmas, Nevra

2014-01-01

Epithelioid angiomyolipoma (E-AML), accounting for 8% of renal angiomyolipoma, is usually associated with tuberous sclerosis (TS) and demonstrates aggressive behavior. E-AML is macroscopically seen as a large infiltrative necrotic tumor with occasional extension into renal vein and/or inferior vena cava. However, without history of TS, renal sinus and venous invasion E-AML would be a challenging diagnosis, which may lead radiologists to misinterpret it as a renal cell carcinoma (RCC). In this case presentation, we aimed to report cross-sectional imaging findings of two cases diagnosed as E-AML and pathological correlation of these aforementioned masses mimicking RCC.

Propagación aproximada de intervalos de probabilidad en grafos de dependencias

OpenAIRE

Cano Utrera, Andrés

2013-01-01

Las redes bayesianas han sido usadas muy frecuentemente para la construcción de sistemas expertos bayesianos. Estos sistemas expertos trabajan con valores de probabilidad precisos. Para un experto resulta muy difícil el dar una gran cantidad de probabilidades precisas a la hora de construir el sistema experto. Debido a ello en esta tesis se propone el uso de intervalos de probabilidad para representar la incertidumbre. Existen algoritmos exactos de propagación de intervalos de probabilidad so...

Left-sided and duplicate inferior vena cava: a case series and review.

Science.gov (United States)

Ang, Wee Choen; Doyle, Terry; Stringer, Mark D

2013-11-01

Left-sided and duplicate inferior vena cava (IVC) are two major anatomical variants within the spectrum of IVC malformations, both of which are developmental abnormalities of the supracardinal veins. Four clinical cases are described to highlight the computed tomographic appearances of these vascular malformations and provide novel data on venous dimensions. A systematic review of the recent literature (2000-2011) was conducted focusing on the anatomy, demographics, and associated pathology (congenital and acquired) of isolated left-sided and duplicate IVC. A total of 73 relevant articles were retrieved, consisting of case reports and small case series. The prevalence of left-sided IVC is about 0.1-0.4% and that for duplicate IVC about 0.3-0.4%; both anomalies show a slight male preponderance. In each condition, there are documented variations in the course and tributaries of the IVC. The clinical importance of these anomalies lies in three principal areas: the potential for misdiagnosis on imaging; technical difficulties during retroperitoneal surgery (particularly abdominal aortic aneurysm repair and live donor nephrectomy); and their significance in relation to the etiology and management of venous thromboembolism. Copyright © 2012 Wiley Periodicals, Inc.

ASMATHOUR (1971 – PARA CORO E PERCUSSÃO – DE GILBERTO MENDES: UMA ABORDAGEM ANALÍTICA DO USO DE CONTRASTES DE DENSIDADE E DE INTENSIDADE

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Adriana Francato

2005-12-01

Full Text Available O presente artigo aborda a obra Asthmatour, para coro e percussão, composta em 1971 pelo compositor brasileiro Gilberto Mendes e propõe uma análise musical enfocando o uso de contrastes de densidade e de intensidade pelo compositor no decorrer da obra. Na análise, foram usadas como referências manuscritos que retratam seu processo composicional e que foram compilados pela pesquisadora Rosemara Staub de Barros Zago (ZAGO:2000 e obras teóricas de autores que analisam os movimentos surgidos no século XX, como David Cope (COPE:1993 e Michael Nyman (NYMAN:2000. O compositor cria uma estrutura delimitada e definida e, a partir dela, utiliza o recurso da montagem na organização dos materiais, num processo aberto à criação do intérprete.

Vena Cava Responsiveness to Controlled Isovolumetric Respiratory Efforts.

Science.gov (United States)

Folino, Anna; Benzo, Marco; Pasquero, Paolo; Laguzzi, Andrea; Mesin, Luca; Messere, Alessandro; Porta, Massimo; Roatta, Silvestro

2017-10-01

Respirophasic variation of inferior vena cava (IVC) size is affected by large variability with spontaneous breathing. This study aims at characterizing the dependence of IVC size on controlled changes in intrathoracic pressure. Ten healthy subjects, in supine position, performed controlled isovolumetric respiratory efforts at functional residual capacity, attaining positive (5, 10, and 15 mmHg) and negative (-5, -10, and -15 mmHg) alveolar pressure levels. The isovolumetric constraint implies that equivalent changes are exhibited by alveolar and intrathoracic pressures during respiratory tasks. The IVC cross-sectional area equal to 2.88 ± 0.43 cm 2 at baseline (alveolar pressure = 0 mmHg) was progressively decreased by both expiratory and inspiratory efforts of increasing strength, with diaphragmatic efforts producing larger effects than thoracic ones: -55 ± 15% decrease, at +15 mmHg of alveolar pressure (P < .01), -80 ± 33 ± 12% at -15 mmHg diaphragmatic (P < .01), -33 ± 12% at -15 mmHg thoracic. Significant IVC changes in size (P < .01) and pulsatility (P < .05), along with non significant reduction in the response to respiratory efforts, were also observed during the first 30 minutes of supine rest, detecting an increase in vascular filling, and taking place after switching from the standing to the supine position. This study quantified the dependence of the IVC cross-sectional area on controlled intrathoracic pressure changes and evidenced the stronger influence of diaphragmatic over thoracic activity. Individual variability in thoracic/diaphragmatic respiratory pattern should be considered in the interpretation of the respirophasic modulations of IVC size. © 2017 by the American Institute of Ultrasound in Medicine.

Protocolo para ensaios físico-químicos de estabilidade de fitocosméticos

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V. L.B. ISAAC

2009-01-01

Full Text Available

A crescente demanda por produtos cosméticos estáveis, seguros e eficazes tem exigido da comunidade científica estudos cada vez mais complexos e utilização de técnicas mais eficientes para determinação da estabilidade dos produtos. O uso de ativos da biodiversidade brasileira levou ao desenvolvimento de inúmeros produtos, nas mais diferentes formas cosméticas, o que dificulta, ainda mais, a padronização de protocolos experimentais para atestar a estabilidade das preparações cosméticas. Embora não exista no Brasil um protocolo que padronize os ensaios a serem realizados para se determinar a estabilidade dos produtos, vários estudos foram realizados nos meios acadêmicos para determinação da estabilidade de matérias-primas específicas. As características reológicas são propriedades importantes a serem consideradas na fabricação, estocagem e aplicação de produtos de uso tópico. Além de ensaios comumente empregados, a determinação do comportamento reológico da formulação auxilia na avaliação da natureza físico-química do veículo, de tal forma que torna possível detectar sinais precoces de instabilidade física, possibilitando o controle de qualidade dos constituintes, das formulações teste e dos produtos finais. A análise térmica também é usada para auxiliar o estudo da estabilidade de produtos cosméticos e, de modo geral, a calorimetria exploratória diferencial para orientar o desenvolvimento de novos produtos. Outras ferramentas, como a fluorimetria e a granulometria a laser podem auxiliar o estudo e o desenvolvimento de sistemas, emulsionados ou não. O objetivo deste estudo é o desenvolvimento de protocolo para o estudo da estabilidade físico-química de fitocosméticos - sistemas contendo ativos da biodiversidade brasileira. Palavras-chave: biodiversidade brasileira

Herramienta para la evaluación del riesgo de robo en el autotransporte de carga

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Elizabeth De la Torre

2014-01-01

Full Text Available Introducción: En México el robo se ha convertido en uno de los riesgos más importantes para la eficiencia y la competitividad de las cadenas de suministro. Esta propuesta busca identificar las variables que influyen sobre el riesgo de robo en el autotransporte como paso previo de una metodología para evaluar cuantitativamente la influencia de las variables identificadas y crear una aplicación que permita evaluar el riesgo de robo, apoyando así a la toma de decisiones en la creación de esquemas de seguridad. Metodología: El proceso para identificar estas variables de riesgo fue el análisis estadístico de la información disponible de robos de carga mediante el método de Análisis de Componentes Principales, determinando un primer conjunto de variables de interés para el diseño de una encuesta que se aplicó a expertos en seguridad de la cadena de suministro empleando la metodología Delphi y estableciendo ponderaciones a través del Proceso de Jerarquización Analítica. Resultados: Con la metodología propuesta se obtuvieron los factores más relevantes en el riesgo de robo en el autotransporte y se construyó una función para obtener un índice del riesgo. La función propuesta se programó en una aplicación computacional que facilita el cálculo del indicador propuesto con información de pares origen-destino determinados. Los resultados de la metodología permitirán confirmar las variables usadas o identificar nuevas variables considerando las cuantificaciones de su influencia en el riesgo. Discusión y Conclusión: Obtener información confiable sobre robos de carga es muy difícil, por lo sensible del tema y la inexactitud de los datos publicados. Estas imprecisiones y las percepciones subjetivas asociadas se atenúan con esta metodología basada en opiniones de expertos y en las técnicas cuantitativas referidas para integrar el índice de riesgo propuesto. Este índice permite dimensionar y comparar estrategias de

Clave para la determinación de exuvias pupales de los quironómidos (Diptera: Chironomidae de ríos altoandinos tropicales

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Narcís Prat

2014-12-01

Full Text Available Chironomidae es una familia cosmopolita de dípteros nematóceros que comprende más de 20 000 especies descritas. Sin embargo, la diversidad de géneros y especies presentes en la región andina del Neotrópico es poco conocida. Por tal motivo se desarrolló una clave taxonómica para identificar las pupas y exuvias pupales de 46 géneros de la familia Chironomidae presentes en ríos de alta montaña ubicados en la cordillera de los Andes por encima de los 2 000msnm. Se utilizó material de colección obtenido de levantamientos faunísticos y estudios de biomonitoreo en diferentes ríos y quebradas de Colombia, Ecuador y Perú. La clave incluye ilustraciones y breves descripciones taxonómicas de todos los géneros incluyendo algunos que aún no han sido descritos formalmente. Para estos últimos se siguió la nomenclatura usada por Roback & Coffman (1983. Para los géneros Cricotopus y Género 1 se incluyen claves para la determinación de las morfoespecies más comunes. En el ensamblaje de quironómidos de la región altoandina domina la subfamilia Orthocladiinae (22 géneros seguida por Chironominae (13 géneros, patrón que contrasta con la dominancia de Chironominae en las zonas de menor altura de la región Neotropical. Se encontraron seis géneros pertenecientes a la subfamilia Tanypodinae, mientras que para Podonominae y Diamesinae estuvieron presentes tres y dos géneros respectivamente. Esta clave podría llegar a ser muy útil en estudios de la deriva y programas de biomonitoreo de los ríos altoandinos neotropicales.

Viabilidade técnica e econômica da caixa Embrapa para comercialização de tomate para consumo in natura Technical and economic viability of the Embrapa crate for marketing of fresh tomatoes

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Nirlene J. Vilela

2002-06-01

Full Text Available Foram avaliadas as vantagens econômicas da nova embalagem desenvolvida pela Embrapa Hortaliças para comercialização de tomate para consumo in natura. A caixa tipo "K", embalagem mais usada no Brasil, tem grande número de características indesejáveis. Considerando os problemas da caixa tipo "K" e o alto índice de perdas pós-colheita na cadeia produtiva de hortaliças, a Embrapa Hortaliças iniciou um programa de pesquisa para o desenvolvimento de uma nova embalagem para tomate. O trabalho culminou com a definição da nova embalagem de plástico nomeada caixa Embrapa. Além de outras vantagens técnicas a nova embalagem, comparada com a caixa tipo "K", apresentou redução de perdas pós colheita (17%, considerando a conservação e integridade dos frutos. Para um horizonte de 5 anos, os indicadores econômicos para ambas embalagens, mostraram viabilidade econômica superior para a caixa Embrapa, sendo o valor presente líquido de, aproximadamente, R$ 60,7 mil e R$ 90,0 mil para a caixa tipo "K" e Caixa Embrapa, respectivamente. A taxa de benefício/custo foi de 4,80 e 7,80 para a caixa tipo "K" e caixa Embrapa, respectivamente. Considerando preços correntes e custos totais, a caixa Embrapa apresentou-se técnica e economicamente viável.The economic advantages of a new crate developed for commercialization of fresh tomatoes was evaluated. The Box type "K", name of the package for fresh vegetables crops mostly employed in Brazil, has many undesirables features. Considering the problems of box type "K" and the high index of post harvest losses in the production chain of vegetables, Embrapa Hortaliças started a research program focusing on the development of a new container for fresh tomatoes. This work ended with the adaptation of a new crate model made of plastic. This Embrapa crate showed comparative physical advantages of approximately 17% reduction in postharvest losses when compared to the box type K, considering conservation and

The clinical application of inferior vena cava filters: the essential point is to use it appropriately

International Nuclear Information System (INIS)

Yang Zhengqiang; Li Linsun

2011-01-01

This paper aims to describe the history and current situation of the clinical application of inferior venal cava (IVC) filters. As there is a possible tendency for physicians to abuse the IVC filters in clinical practice, the authors think that it is necessary now to judge the advantages and disadvantages of the use of IVC filters again and to conscientiously reconsider what kind of patients are suitable for IVC filter implantation. In this article, the proper characteristics that an ideal IVC filter should possess are introduced, the indications for IVC filter implantation are discussed and the complications occurred after IVC filter implantation are analyzed. The authors believe that the retrievable filters will gradually substitute for permanent filters, for this reason, studies concerning IVC retrievable filters will become the hot spots of research in the near future. (authors)

SU-G-IeP4-15: Ultrasound Imaging of Absorbable Inferior Vena Cava Filters for Proper Placement

Energy Technology Data Exchange (ETDEWEB)

Mitcham, T; Bouchard, R; Melancon, A; Melancon, M [University of Texas MD Anderson Cancer Center, Houston, TX (United States); Eggers, M [Adient Medical Technologies, Pearland, TX (United States)

2016-06-15

Purpose: Inferior vena cava filters (IVCFs) are used in patients with a high risk of pulmonary embolism in situations when the use of blood thinning drugs would be inappropriate. These filters are implanted under x-ray guidance; however, this provides a dose of ionizing radiation to both patient and physician. B-mode ultrasound (US) imaging allows for localization of certain implanted devices without radiation dose concerns. The goal of this study was to investigate the feasibility of imaging the placement of absorbable IVCFs using US imaging to alleviate the dosage concern inherent to fluoroscopy. Methods: A phantom was constructed to mimic a human IVC using tissue-mimicking material with 0.5 dB/cm/MHz acoustic attenuation, while agar inclusions were used to model acoustic mismatch at the venous interface. Absorbable IVCF’s were imaged at 15 cm depth using B-mode US at 2, 3, 5, and 7 MHz transmit frequencies. Then, to determine temporal stability, the IVCF was left in the phantom for 10 weeks; during this time, the IVCF was imaged using the same techniques as above, while the integrity of the filter was analyzed by inspecting for fiber discontinuities. Results: Visualization of the inferior vena cava filter was possible at 5, 7.5, and 15 cm depth at US central frequencies of 2, 3, 5, and 7 MHz. Imaging the IVCF at 5 MHz yielded the clearest images while maintaining acceptable spatial resolution for identifying the IVCF’s, while lower frequencies provided noticeably worse image quality. No obvious degradation was observed over the course of the 10 weeks in a static phantom environment. Conclusion: Biodegradable IVCF localization was possible up to 15 cm in depth using conventional B-mode US in a tissue-mimicking phantom. This leads to the potential for using B-mode US to guide the placement of the IVCF upon deployment by the interventional radiologist. Mitch Eggers is an owner of Adient Medical Technologies. There are no other conflicts of interest to disclose.

Impact of an inferior vena cava filter retrieval algorithm on filter retrieval rates in a cancer population.

Science.gov (United States)

Litwin, Robert J; Huang, Steven Y; Sabir, Sharjeel H; Hoang, Quoc B; Ahrar, Kamran; Ahrar, Judy; Tam, Alda L; Mahvash, Armeen; Ensor, Joe E; Kroll, Michael; Gupta, Sanjay

2017-09-01

Our primary purpose was to assess the impact of an inferior vena cava filter retrieval algorithm in a cancer population. Because cancer patients are at persistently elevated risk for development of venous thromboembolism (VTE), our secondary purpose was to assess the incidence of recurrent VTE in patients who underwent filter retrieval. Patients with malignant disease who had retrievable filters placed at a tertiary care cancer hospital from August 2010 to July 2014 were retrospectively studied. A filter retrieval algorithm was established in August 2012. Patients and referring physicians were contacted in the postintervention period when review of the medical record indicated that filter retrieval was clinically appropriate. Patients were classified into preintervention (August 2010-July 2012) and postintervention (August 2012-July 2014) study cohorts. Retrieval rates and clinical pathologic records were reviewed. Filter retrieval was attempted in 34 (17.4%) of 195 patients in the preintervention cohort and 66 (32.8%) of 201 patients in the postintervention cohort (P filter retrieval in the preintervention and postintervention cohorts was 60 days (range, 20-428 days) and 107 days (range, 9-600 days), respectively (P = .16). In the preintervention cohort, 49 of 195 (25.1%) patients were lost to follow-up compared with 24 of 201 (11.9%) patients in the postintervention cohort (P filter placement to death, when available. The overall survival for patients whose filters were retrieved was longer compared with the overall survival for patients whose filters were not retrieved (P filter retrieval, two patients (2.5%) suffered from recurrent VTE (n = 1 nonfatal pulmonary embolism; n = 1 deep venous thrombosis). Both patients were treated with anticoagulation without filter replacement. Inferior vena cava filter retrieval rates can be significantly increased in patients with malignant disease with a low rate (2.5%) of recurrent VTE after filter retrieval

Estudo de fibras alimentares em frutas e hortaliças para uso em nutrição enteral ou oral Study of dietary fibre in fruits and vegetables for use in oral or enteral diets

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Edma Maria de Araújo

2010-03-01

Full Text Available Dietas enterais com alimentos convencionais são usadas em nutrição domiciliar para fornecer macronutrientes, obter dietas individualizadas e de menor custo. O objetivo deste trabalho foi estudar frutas e hortaliças (alface, berinjela, cenoura, chicória, goiaba e tamarindo como fontes de fibras alimentares solúveis e insolúveis para serem usadas em nutrição enteral ou suplemento nutricional oral. As hortaliças e frutas foram adicionadas a uma formulação enteral domiciliar e também preparadas em solução com água. Foram determinadas a composição centesimal, as fibras solúveis e insolúveis dos alimentos, a atividade de água e o pH das formulações. Foram realizados testes de gotejamento das formulações com os alimentos experimentais. A melhor proporção de alimento/dieta enteral domiciliar foi de 100 g/2 L para dieta enteral e de 150 g/2 L para suplemento nutricional oral (ingestão por boca. As quantidades de cada alimento adicionadas à formulação enteral equivalem a duas porções (100 g diárias de cada alimento para 2 L e 2000 kcal. A maior contribuição para aumentar a quantidade de fibras foi da goiaba e a menor, da berinjela. Os valores de atividade de água ficaram entre 0,95 e 1,00, indicando que as dietas são susceptíveis à contaminação microbiana. Nessas condições, devem ser consumidas imediatamente após o preparo.Enteral diets based on conventional foods are used in domestic nutritional therapy to provide macronutrients, obtain individualised diets and to lower costs. Eggplant, carrot, chicory, lettuce, guava and tamarind were studied as sources of soluble and insoluble fibers for use in enteral diets or as oral nutritional supplements, added to a domestic enteral formulation and also prepared in aqueous solution. The following physical-chemical characteristics were determined: soluble and insoluble fibers, proximate composition, pH and water activity. Drip tests were carried out with the formulas

PROJETO DE ENERGIA ELÉTRICA ATRÁVES DA BIOMASSA: para o auditório da escola Osvaldo Cruz

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Jhon Leo de Souza Dorn

2011-07-01

Full Text Available A geração de eletricidade através da biomassa tem sido umas das alternativas de fontes renováveis no século XXI, tendo em vista que o Brasil é uma grande potência no uso da biomassa como fonte de energia elétrica, com destaques para algumas regiões, dentro dela o estado do MT, onde na Escola Osvaldo Cruz, localizado na Av. dos Ingás, nº 2222, Jardim Imperial em Sinop–MT, está sendo realizado este projeto de pesquisa sobre o uso da biomassa como fonte de eletricidade para um auditório. Tendo como objetivo gerar eletricidade através da biomassa para um local específico (auditório na escola Osvaldo Cruz, onde também serão avaliadas, melhorias das instalações elétricas para melhor aproveitamento da energia, fatores econômicos, quais os resíduos usados para gerar a eletricidade e por último a viabilidade do projeto. Este projeto abrangera a todos os alunos, pais, docentes da escola onde o projeto foi realizado e sociedade local de Sinop, onde todos poderão ser beneficiados direto ou indiretamente com o uso desta fonte de energia elétrica. Segundo o entrevistado Thomas Lovejoy do documentário Zugzwang (2009: “Pelo uso de combustíveis fósseis e também pela destruição de florestas tropicais estamos transformando o clima da Terra em algo hostil a vida na Terra e à vida humana. É essencial que criemos uma nova matriz energética.” Devido a este fator ambiental, será usada a biomassa neste projeto por ser uma fonte de energia renovável, onde terá como beneficiário a escola acima citada, onde a energia elétrica será produzida através da combustão de um resíduo orgânico agrícola (casca de arroz.

Evaluation of Retrievability of the Gunther Tulip Vena Cava Filter

International Nuclear Information System (INIS)

Yamagami, Takuji; Kato, Takeharu; Hirota, Tatsuya; Yoshimatsu, Rika; Matsumoto, Tomohiro; Nishimura, Tsunehiko

2007-01-01

Purpose. To evaluate the feasibility and safety of withdrawal of a Gunther tulip retrievable vena cava filter (GTF). Methods. Between June 2001 and December 2005, at our institution 86 GTFs were implanted for temporary caval filtration in 59 patients (37 women, 22 men; mean age 59.3 years, range 18-87 years). For GTFs retrieved thereafter, we retrospectively reviewed the following parameters: rate of success in retrieval, degree of trapped thrombus in the filter, and complications during retrieval. Results. Worsening of or new development of pulmonary embolism after filter implantation did not occur in any patient. Of the 86 GTFs implanted, retrieval of 80 was attempted. Among those 80 filters, 77 (96%) were successfully retrieved (with the standard method, n = 72; with the modified method, n = 5) without any complication. The period of implantation of the retrieved filters was 13.4 ± 4.2 days. In the 5 filters that were filled to a height of ≥ 1/4 with trapped thrombus, retrieval was performed after attempts were made to decrease trapped thrombi. In addition, a temporary filter or another GTF was temporarily placed at the cephalad level of the GTF during this removal procedure. Conclusion. GTFs can be retrieved in the majority of cases. Even when encountering situations in which the filter could not be removed using the standard method, withdrawal was possible in a high frequency of cases through various trials using modified methods

Outcome and management of pacemaker-induced superior vena cava syndrome.

Science.gov (United States)

Fu, Hai-Xia; Huang, Xin-Miao; Zhong, Li; Osborn, Michael J; Bjarnason, Haraldur; Mulpuru, Siva; Zhao, Xian-Xian; Friedman, Paul A; Cha, Yong-Mei

2014-11-01

We aimed to determine the long-term outcomes of percutaneous lead extraction and stent placement in patients with pacemaker-induced superior vena cava (SVC) syndrome. The study retrospectively screened patients who underwent lead extraction followed by central vein stent implantation at Mayo Clinic (Rochester, MN, USA), from January 2005 to December 2012, to identify the patients with pacemaker-induced SVC syndrome. Demographic, clinical, and follow-up characteristics of those patients were collected from electronic medical records. Six cases were identified. The mean (standard deviation) age was 56 (15) years (male, 67%). All patients had permanent dual-chamber pacemakers, with a mean 11-year history of pacemaker placement. The entire device system was explanted in five patients; one patient had a 21-year-old pacemaker lead that could not be removed. Eight stents were implanted in six patients: five patients had one stent, one patient had three. A new pacemaker system was reimplanted through the stented vein in five patients. Technical success was achieved in all patients, without any complication. Symptoms rapidly resolved in all patients after stent deployment. The mean follow-up duration was 48 months (range, 10-100 months). Three patients remained symptom free. Reintervention with percutaneous balloon venoplasty was successful in three patients with symptom recurrence. Percutaneous stent implantation after lead removal followed by reimplantation of leads is a feasible alternative therapy for pacemaker-induced SVC syndrome, although some cases may require repeat intervention. ©2014 Wiley Periodicals, Inc.

Actividad antifungica de extractos de plantas usadas en medicina popular en Argentina

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Roberto Davicino

2013-04-01

Full Text Available Los hongos pueden causar enfermedades en humanos, especialmente en pacientes inmunosuprimidos. En este estudio, extractos de 10 plantas utilizadas en medicina popular en Argentina fueron ensayadas para estudiar la actividad antifúngica in vitro contra 4 cepas de hongos. De todas las plantas testeadas, solo 4 mostraron actividad antifúngica: Larrea divaricata Cav, Gnaphalium gaudichaudianum D.C, Baccharis trimera Less y Schinus terebenthifolius.

Método de utilização do programa Energyplus para verificação de desempenho térmico de ambientes com fachadas duplas

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Sabrina Andrade Barbosa

Full Text Available A fachada dupla consiste de duas camadas, em geral envidraçadas, colocadas a certa distância, formando uma cavidade intermediária por onde o ar circula. Essas camadas abrangem fenômenos físicos complexos, como a ventilação por efeito chaminé e as trocas térmicas radiantes. Este trabalho apresenta um método de simulação com o programa EnergyPlus para análise do desempenho de um ambiente com fachada dupla. As camadas da fachada dupla estão submetidas às trocas radiantes e convectivas na cavidade intermediária devido ao efeito da ventilação provocado pela chaminé térmica. O método empregado considera a cavidade (entre camadas como um microclima, cujas condições climáticas foram usadas para gerar um arquivo climático específico dessa zona. Esse arquivo foi posteriormente usado em outra simulação, que considerou apenas a camada interna da fachada, com foco na radiação solar. São apresentados dados que validam o processo de simulação, em vista das variáveis disponíveis pelo programa. Os resultados foram comparados a um caso-base sem fachada dupla. Os ganhos de calor pela fachada e as temperaturas operativas internas foram usados para verificação do desempenho térmico do ambiente com a fachada dupla. Esse processo fornece subsídios para análise de modelos mais complexos.

Implantation of a cardiac resynchronization therapy-defibrillator device in a patient with persistent left superior vena cava.

Science.gov (United States)

Atar, İlyas; Karaçağlar, Emir; Özçalık, Emre; Özin, Bülent; Müderrisoğlu, Haldun

2015-06-01

Presence of a persistent left superior vena cava (PLSVC) is generally clinically asymptomatic and discovered incidentally during central venous catheterization. However, PLSVC may cause technical difficulties during cardiac device implantation. An 82-year-old man with heart failure symptoms and an ejection fraction (EF) of 20% was scheduled for resynchronization therapy-defibrillator device (CRT-D) implantation. A PLSVC draining via a dilated coronary sinus into an enlarged right atrium was diagnosed. First, an active-fixation right ventricular lead was inserted into the right atrium through the PLSVC. The stylet was preshaped to facilitate its passage to the right ventricular apex. An atrial lead was positioned on the right atrium free wall, and an over-the-wire coronary sinus lead deployed to a stable position. CRT-D implantation procedure was successfully completed.

Mathematical Model to Compare Egg Production C Modelo Matemático para Comparar Curvas de Produção de Ovos

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FB Fialho

2001-12-01

Full Text Available A segmented polynomial model was used on several egg production curves in an attempt to analyze the differences between the curves in a more descriptive manner. Production curves from different commercial and experimental genetic lines of layers were used. The parameters of the model include the age and level of peak production, rate of decrease in production after the peak and time between start and peak of production. These and other derived variables were compared between the curves using contrasts. The methodology used allowed an easier interpretation of the curves, and the detection of differences in sexual maturity, uniformity and peak of production. This work validates the segmented polynomial model for use in future research dealing with analysis of egg production curves.Um modelo polinomial segmentado foi usado em diversas curvas de produção de ovos, numa tentativa de analisar as diferenças entre as curvas de um modo mais descritivo. Foram usadas curvas de produção de diferentes linhagens comerciais e experimentais de poedeiras. Os parâmetros do modelo incluem a idade e nível do pico de produção, a taxa de decréscimo na produção após o pico e o tempo entre o início e o pico de produção. Essas e outras variáveis derivadas pelo modelo foram comparadas entre as curvas usando contrastes. A metodologia usada facilitou a interpretação das curvas e a detecção de diferenças na maturidade sexual, uniformidade e pico de produção. Esse trabalho valida o modelo de polinômios segmentados para uso em pesquisas futuras que tratem de análise de curvas de produção de ovos.

Inverted Nutcracker Syndrome: A Case of Persistent Hematuria and Pain in the Presence of a Left-Sided Inferior Vena Cava

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Obi Ekwenna

2011-01-01

Full Text Available Nutcracker syndrome is described as the symptomatic compression of left renal vein between the aorta and the superior mesenteric artery, resulting in outflow congestion of the left kidney. We present the case of a 51-year-old male with a left-sided inferior vena cava, resulting in compression of the right renal vein by the superior mesenteric artery. Secondary to this anatomic anomaly, the patient experienced a many-year history of flank pain and intermittent gross hematuria. We have termed this unusual anatomic finding and its associated symptoms as the “inverted nutcracker syndrome”, and describe its successful management with nephrectomy and autotransplantation.

Renal Sinus Fat Invasion and Tumoral Thrombosis of the Inferior Vena Cava-Renal Vein: Only Confined to Renal Cell Carcinoma

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Turker Acar

2014-01-01

Full Text Available Epithelioid angiomyolipoma (E-AML, accounting for 8% of renal angiomyolipoma, is usually associated with tuberous sclerosis (TS and demonstrates aggressive behavior. E-AML is macroscopically seen as a large infiltrative necrotic tumor with occasional extension into renal vein and/or inferior vena cava. However, without history of TS, renal sinus and venous invasion E-AML would be a challenging diagnosis, which may lead radiologists to misinterpret it as a renal cell carcinoma (RCC. In this case presentation, we aimed to report cross-sectional imaging findings of two cases diagnosed as E-AML and pathological correlation of these aforementioned masses mimicking RCC.

Os programas de pesquisa de Lakatos: uma leitura para o entendimento da construção do conhecimento em sala de aula em situações de contradição e controvérsia

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Carlos Eduardo Laburú

1998-01-01

Full Text Available Este trabalho faz uma analogia entre os programas de pesquisa de Lakatos e a dinâmica das idéias dos estudantes em situações de sala de aula. Esta analogia revelou-se uma maneira produtiva de análise do desenvolvimento das concepções dos estudantes durante um processo de discussão. Com as condições de inteligibilidade, plausibilidade e frutibilidade de Posner et alii (1982, pudemos enriquecer a análise baseada previamente nos programas. Mostramos com um exemplo videogravado durante uma aula que a nossa abordagem pode ser efetivamente usada como um instrumento analítico para ajudar o professor a entender e melhorar os processos de ensino e de aprendizagem.

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.

Determinación de la eficiencia de la cocción con leña en las veredas de Usme, Bogotá//Determining cook efficiency using wood as fuel in rural area of Usme, Bogotá

OpenAIRE

Fabio Emiro Sierra‐Vargas; Carlos Alberto Guerrero‐Fajardo; Fabiola Mejía‐Barragán

2014-01-01

La investigación buscó establecer las condiciones actuales de cocción con leña en la zona rural de Usme, localidad de la ciudad de Bogotá. Se realizó trabajo de campo para identificar las especies leñosas más usadas para cocción de alimentos, las cuales se caracterizaron para identificar su potencial energético, se aplicaron encuestas, para contar con la información socioeconómica de los pobladores y se realizó experimentación directa en algunas cocinas de la zona, determinándose la eficienci...

Consenso expandido do BCTRIMS para o tratamento da esclerose múltipla: II. As evidências para o uso de glicocorticóides e imunomoduladores The BCTRIMS expanded consensus on treatment of multiple sclerosis: II. The evidences for the use of glucocorticoids and immunomodulatory treatments

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Marcos Aurélio Moreira

2002-09-01

Full Text Available A esclerose múltipla (EM é doença inflamatória em que mecanismos imunológicos desempenham importante papel na patogênese das lesões do sistema nervoso central. Drogas que agem em diferentes etapas destes mecanismos têm sido usadas em seu tratamento. O presente artigo analisa com base nas classes de evidências científicas e tipos de recomendações propostos pela comunidade científica, os mais importantes ensaios clínico-terapêuticos com os glicocorticóides e os imunomoduladores, incluindo a imunoglobulina humana endovenosa, no tratamento da esclerose múltipla. Ele tem por objetivo fornecer subsídios para a formulação do Consenso Expandido para o Tratamento da Esclerose Múltipla.Multiple sclerosis is an inflammatory disease in which immunological mechanisms play an important role in causing demyelinating lesions in the central nervous system. A number of drugs acting in different stages of these mechanisms have been tested for its treatment. This paper analyses the most important clinical trials with glucocorticoids and immunomodulatory treatments, including human immunoglobulin, using the classes of evidences and types of recommendations as have been defined and widely accepted by the international scientific community. It aims to provide sufficient information to support the BCTRIMS Expanded Consensus on Treatment of MS.

Distribution of the Entodiniomorphid ciliate Troglocorys cava Tokiwa, Modrý, Ito, Pomajbíková, Petrželková, & Imai, 2010, (Entodiniomorphida: Blepharocorythidae) in wild and captive chimpanzees

Czech Academy of Sciences Publication Activity Database

Pomajbíková, K.; Petrželková, Klára Judita; Petrášová, J.; Profousová, Ilona; Kalousová, Barbora; Jirků, Miloslav; Sá, R. M.; Modrý, David

2012-01-01

Roč. 59, č. 1 (2012), s. 97-99 ISSN 1066-5234 R&D Projects: GA ČR GA524/06/0264; GA ČR GA206/09/0927; GA AV ČR KJB600930615 Institutional research plan: CEZ:AV0Z60930519; CEZ:AV0Z60220518 Keywords : chimpanzees * Entodiniomorphida * intestinal ciliates * prevalence * Troglocorys cava Subject RIV: EG - Zoology Impact factor: 2.162, year: 2012

Tratamiento endovascular con estent de síndrome de vena cava superior asociado a cables de marcapasos. Revisión de la literatura

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Andrés Reyes Valdivia

2017-09-01

Full Text Available La aparición de trombosis venosa asociada a cables de marcapasos no es una entidad infrecuente, cursando habitualmente de forma asintomática o con síntomas leves debido a la dificultad del retorno venoso. Esto debido a la colateralidad secundaria y progresiva que compensa dicho componente mecánico obstructivo. La presentación sintomática como síndrome de vena cava superior no es habitual y su aparición por tanto, poco frecuente; dada la extensa colateralidad venosa que asocian estos pacientes.

Filtrado Adaptativo de Componentes Involuntarias en Marcha Asistida por Andador para Detección de Intenciones

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A. Frizera

2011-04-01

Full Text Available Resumen: En este trabajo, se presenta un método de filtrado adaptativo para la eliminación de las componentes involuntarias de las fuerzas de interacción entre el usuario y el andador por el apoyo de sus miembros superiores. Este proceso se basa en la atenuación selectiva de componentes relacionadas con las oscilaciones del tronco del sujeto durante la marcha. Para ello, se hace la estimación de la cadencia de marcha en tiempo real procesando las señales de distancia obtenidas por un subsistema ultrasónico mediante el algoritmo Weighted-Frequency Fourier Linear Combiner (WFLC. Este subsistema suministra la distancia entre los pies del usuario y el andador en tiempo real. La cadencia a su vez es usada para el ajuste de un filtro notch adaptativo construido a partir del algoritmo Fourier Linear Combiner (FLC que realiza el filtrado en tiempo real de las señales obtenidas del subsistema de medición de fuerzas de apoyo de antebrazos. El método propuesto ofrece una cancelación robusta y en tiempo real de cerca del 80% de la amplitud de las componentes indeseadas de frecuencia. La salida del algoritmo de filtrado propuesto permite así evidenciar componentes de fuerzas de bajo nivel pero muy importantes ya que están generadas por acciones intencionales y naturales asociadas a las intenciones de guiado del andador. Estas componentes serán utilizadas en el control de los motores del andador basándose en una arquitectura de control clásico que será desarrollada posteriormente. Palabras clave: Robótica de rehabilitación, interfaz hombre-máquina, filtrado adaptativo, detección de intenciones, marcha humana

INFLUENCIA DE LA CONCENTRACIÓN DE MELAZA Y EXTRACTO ACUOSO DE SOYA SOBRE LA VELOCIDAD ESPECÍFICA DE CRECIMIENTO DE Bradyrhizobium elkanii ICA 8001

OpenAIRE

Gretel Gómez; María C. Nápoles; R. Núñez; J. Martínez

2008-01-01

La cepa ICA 8001 de Bradyrhizobium elkanii es ampliamente usada en Cuba para la producción de inoculantes para soya. Uno de los medios de cultivos diseñados para la multiplicación de este microorganismo contiene melaza y extracto acuoso de soya, elementos de variable composición y origen, que aportan cantidades notables de sustratos carbonados. Por esta causa, se determinó la concentración de carbohidratos totales solubles y carbohidratos reductores, así como los contenidos de N, P, K, Ca, Mg...

Caracterização etnopedológica de Planossolos utilizados em cerâmica artesanal no Agreste Paraibano

OpenAIRE

Alves,Ângelo Giuseppe Chaves; Marques,José Geraldo Wanderley; Queiroz,Sandra Barreto de; Silva,Ivandro de França da; Ribeiro,Mateus Rosas

2005-01-01

Técnicas adaptadas da etnociência clássica foram utilizadas para descrever e avaliar os conhecimentos de um grupo de artesãos camponeses do Agreste Paraibano sobre alguns solos que eles usam como recurso cerâmico. Cinco perfis de solo foram descritos por agrônomos-pesquisadores (abordagem eticista) e por camponeses (abordagem emicista), em locais onde a população local extrai material para cerâmica. Amostras coletadas em ambas as abordagens foram usadas para caracterização morfológica e analí...

Estudo observacional do uso da hipodermóclise em cuidados paliativos oncológicos

OpenAIRE

Gabriela Ferri Carone

2016-01-01

Hipodermóclise (HDC) é uma importante técnica alternativa para a administração de medicamentos e fluidos pela via subcutânea. É usada com frequência para o controle dos sintomas em pacientes em cuidados paliativos com dificuldade de acesso venoso e que são incapazes de tolerar medicação oral. No entanto, raros estudos abordaram o uso da HDC de uma forma global, para reposição hidroeletrolítica e terapia medicamentosa, tanto na forma contínua quanto intermitente, observando detalhes e complica...

Producción de biocombustible de avión a partir de residuos agroindustriales a través de una plataforma de furfural

OpenAIRE

Aristizábal Marulanda, Valentina

2015-01-01

El objetivo de esta tesis es el diseño y análisis del proceso para obtener etanol y combustible para avión o bioaditivos para combustible a través de una plataforma de furfural a partir de biomasa lignocelulósica. La caracterización composicional de todas las materias primas usadas se realizó. Los rendimientos de los procedimientos experimentales son obtenidos en la producción de etanol, compuestos furanos y derivados usando cascarilla de arroz, bagazo de caña y zoca de café como materias pri...

ESTIMACIÓN DE LA TASA SOCIAL DE DESCUENTO A LARGO PLAZO EN EL MARCO DE LOS SISTEMAS NACIONALES DE INVERSIÓN. Aplicación al caso chileno

OpenAIRE

Gonzalo Edwards

2016-01-01

Resumen: Este artículo analiza las distintas metodologías usadas en algunos países para estimar la tasa de descuento a largo plazo utilizada en proyectos públicos. Adicionalmente, estima, para Chile, la tasa de descuento, con base en dos metodologías: la primera es una variación del método de descuento gamma, propuesto por Weitzman (2001); la segunda usa la fórmula de Ramsey que se deriva de un modelo de crecimiento para estimar la tasa social de preferencia por el tiempo. Abstract: This p...

Is the inferior vena cava diameter measured by bedside ultrasonography valuable in estimating the intravascular volume in patients with septic shock?

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Mortaza Talebi Doluie

2016-07-01

Full Text Available Introduction:Resuscitation should be initiated immediately in shock. Early goal-directed therapy is an established algorithm for the resuscitation in septic shock. The first step is to maintain cardiac preload. Central venous pressure (CVP plays an important role in goal-directed therapy. Central venous catheterization is invasive and time-consuming in emergency conditions. There are some alternative and noninvasive methods for estimating the intravascular volume such as measuring the inferior vena cava (IVC diameter by ultrasonography. Methods: We searched PubMed, Google scholar, and Scopus databases with keywords (central venous pressure OR venous pressure OR CVP AND (ultrasonography OR sonography AND (sepsis OR septic shock AND (inferior vena cava OR IVC.Result: The search resulted in 2550 articles. The articles were appraised regarding the relevance, type of article, and statistical methods. Finally, 12 articles were selected. The number of patients was between 30 and 83 cases (mean age=57-67 years, intubated and non-intubated in each study. The IVC diameter was measured in respiratory cycle by bedside ultrasonography in longitudinal subxiphoid view and caval index was calculated, then they were compared with the CVP measured by central venous catheter.Discussion: CVP is an indicator of intravascular fluid status and right heart function. CVP measurement is an invasive method and of course with some complications. The IVC is the biggest vein of venous system with low-pressure; expansion of the vein reflects intravascular volume.Conclusion: It seems that IVC diameter measured by ultrasonography could be used as an alternative method for the determination of CVP in the emergency or critical patients.

EVALUACIÓn DEL KIT FISH FARMING FF1A ® PARA ANÁLI SIS DE CALIDAD DE AGUAS EN ACUICULTURA

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HE. Higuera

2006-01-01

Full Text Available Se evaluó a través de métodos analíticos alternos y mediciones de varios observadores la contabilidad en la cuantificación de pH, nitrito (NO2, amoniaco (NH3 y oxígeno disuelto (O2 en aguas utilizando el kit Fish Farming FF1A ® (Hach. El análisis de NH3 tuvo el mayor coeficiente de variación (CV = 15,2 cuando diferentes observadores (n=11 analizaron una muestra problema. Dos muestras (0,5 y 3,0 ppm N-NO2 fueron usadas para medir NO2 comparando el método de diazotización y las lecturas obtenidas con el kit por diferentes observadores (n=10. Los resultados para la primera muestra fueron muy similares (diazotización = 0,54 ppm y Hach = 0,41 ppm N-NO2,CV = 10,5. En la segunda, se presentó una mayor diferencia (diazotización = 4,10 ppm y Hach = 2,97 ppm N-NO2, CV = 14,9. El promedio del pH (n=17 con el kit fue 7,29 ± 0,2 (CV = 2,77; mientras que con el potenciómetro fue de 7,06. La medición de O2 usando el kit arrojó un resultado promedio de 6,1 ± 0,57 ppm (CV = 9,3 mientras que con el oxímetro fue de 4,67 ± 0,15 ppm (CV = 3,2 para 10 mediciones seguidas, hechas sobre un mismo punto en un tanque de peces. El kit de Hach mostró una buena sensibilidad para la medición del pH. El NH3 indicó la mayor dispersión de resultados y los valores de O2 con el kit estuvieron siempre por encima del valor registrado por el oxímetro. Estos resultados sugieren que para algunas variables (amoniaco, nitrito, el kit tiene imprecisiones determinando los valores reales en las aguas analizadas. Para el nitrito, ésto sería de riesgo para especies muy susceptibles al mismo (ej. salmónidos, peces gato mientras que para el amoniaco, imprecisiones en la cuantificación serían de alto riesgo para todas las especies dada la alta susceptibilidad a este metabolito.

CT-Guided Percutaneous Fine-Needle Aspiration Biopsy of the Inferior Vena Cava Wall: A Posterior Coaxial Approach

International Nuclear Information System (INIS)

Kos, Sebastian; Bilecen, Deniz; Baumhoer, Daniel; Guillaume, Nicolas; Jacob, Augustinus L.

2010-01-01

A 72-year-old man was referred to our department with an incidentally diagnosed bronchogenic carcinoma of the right upper lobe. Positron emission tomography (PET) combined with computed tomography (PET-CT) revealed an unexpected hot spot in the ventral wall of the infrarenal segment of the inferior vena cava (IVC). Diagnostic biopsy of this lesion was performed under CT guidance with semiautomated 20G fine-needle aspiration (FNA) through a 19G coaxial needle. Cytology revealed few carcinoma cells, which led to the remarkable diagnosis of a distant metastasis to the IVC wall. Both the immediate postinterventional CT control and the further surveillance period of the patient were unremarkable; in particular, no signs of bleeding complications were detected. We conclude that coaxial FNA of an IVC wall lesion is technically feasible and may even help diagnose distant metastasis.

Design of a new biodegradable vena cava filter%新型生物可降解腔静脉滤器的设计研究

Institute of Scientific and Technical Information of China (English)

赵辉; 张福先; 李海磊; 张欢

2015-01-01

目的：为了弥补目前临床应用中腔静脉滤器的缺陷，本研究设计了一款新型生物可降解型腔静脉滤器，在肺栓塞危险期度过后，滤器可缓慢的降解、吸收，避免了二次取出手术。方法该款滤器由手工制作，分为上下2部分：上方是由6条聚糖乳酸缝线组成的圆锥形过滤结构；下方是聚己内酯支架，支架展开后实现滤器在腔静脉的中央型固定。在超声引导下，将滤器植入到10只犬体内。术后6周手术取出滤器，下腔静脉和肺组织行病理学检查，观察滤器的降解情况、下腔静脉壁的改变以及滤器的降解产物是否导致医源性肺栓塞。结果本研究手工制作了生物可降解滤器，并成功的植入到10只杂交犬的下腔静脉。术后所有犬均正常存活，未发生异常生命体征及伤口感染，有1例犬出现双下肢肿胀。①滤器移位：所有滤器不同程度的向头端移位。有1例犬的植入滤器移位至右房室孔，剩余的9例，滤器移位小于2 cm，仍位于肾静脉以下。②标本肉眼所见：所有的可降解支架被下腔静脉内皮细胞覆盖，肉眼未见明显的变化。滤器植入处下腔静脉壁增厚，但未出现明显狭窄。8例犬可见可吸收缝线完全降解，1例犬出现可吸收缝线被下腔静脉壁包裹，管腔内可见增生的纤维结缔组织和少量炎性细胞浸润，导致约70％的管腔阻塞。③标本HE 染色：9例犬下腔静脉均存在炎性反应，中膜和内膜增厚，肺组织切片未见到降解产物所致的肺动脉栓塞和肺动脉壁的炎性反应。结论本研究成功设计了一款生物可降解腔静脉滤器，并通过动物体内实验证实这款滤器具有良好的生物相容性和可降解性。%Objective To design a new biodegradable vena cava filter which could degrade and be absorbed slowly when the risk of pulmonary embolism (PE)has passed.Methods The filters were