Primary mediastinal leiomyma mimicking a giant mediastinal cyst: A case report

International Nuclear Information System (INIS)

Hwang, Yeong Uk; Kim, Su Young; Lee, Byung Hoon; Hwang, Yoon Joon; Lee, Ji Young; Kim, You Sung; Kim, Han Seong

2016-01-01

Primary mediastinal leiomyoma is an extremely rare benign tumor of smooth muscle. Most common radiographic appearance is a well circumscribed heterogeneous solid mass. We reported a case of giant cyst-like lesion at the middle mediastinum, which was pathologically confirmed as a primary mediastinal leiomyoma

Primary mediastinal leiomyma mimicking a giant mediastinal cyst: A case report

Energy Technology Data Exchange (ETDEWEB)

Hwang, Yeong Uk; Kim, Su Young; Lee, Byung Hoon; Hwang, Yoon Joon; Lee, Ji Young; Kim, You Sung; Kim, Han Seong [Ilsan Paik Hospital, Inje University College of Medicine, Goyang (Korea, Republic of)

2016-08-15

Primary mediastinal leiomyoma is an extremely rare benign tumor of smooth muscle. Most common radiographic appearance is a well circumscribed heterogeneous solid mass. We reported a case of giant cyst-like lesion at the middle mediastinum, which was pathologically confirmed as a primary mediastinal leiomyoma.

Estimación de la masa corporal en géneros del Orden Notoungulata

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Elissamburu, A.

2012-06-01

ecuaciones predictivas para tal fin, respecto a cada taxón en particular, a cada familia y al Orden en general. Se incluyen 535 ejemplares fósiles correspondientes a 50 géneros del orden. La masa corporal de cada género se estima sobre la base de 24 ecuaciones alométricas construidas en mamíferos vivientes, basadas en 19 medidas del esqueleto apendicular y tres medidas dentarias tomadas con calibre digital. El intervalo de masa corporal dado por los valores estimados para el orden se encuentra entre 0,57 kg en Archaeophylus (Interatheriidae y 3797 Kg en Mixotoxodon (Toxodontidae, lo que refleja la gran diversidad de tamaños corporales que caracteriza al grupo. Los menores tamaños se dan en las familias Notostylopidae, Oldfieldthomasiidae, Archaeopithecidae, Interatheriidae, Archaeohyracidae y Hegetotheriidae; tamaños intermedios en los Notohippidae, Isotemnidae y Mesotheriidae y tamaños grandes en Homalodotheriidae. En los Leontiniidae y Toxodontidae los tamaños van de intermedios a grandes, siendo esta última la de mayor variación de masa y con los taxones de mayor tamaño. En comparación con los ungulados holárticos, los notoungulados presentan un intervalo más amplio y variable de masa corporal hacia las formas de menor tamaño y con mayor variedad funcional en las extremidades.

Impacto de la educación participativa en el índice de masa corporal y glicemia en individuos obesos con diabetes tipo 2

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Cabrera-Pivaral Carlos Enrique

2004-01-01

Full Text Available La obesidad eleva el riesgo de morbilidad y mortalidad y se ha relacionado con los hábitos alimentarios y estos con la educación en salud. Esta última tiene como propósito promover la participación de los enfermos en mejorar los comportamientos humanos y estilos de vida saludables y mostrar las ventajas de la educación participativa en la modificación del Índice de Masa Corporal (IMC en el diabético obeso tipo 2. Se realizó un estudio cuasi experimental con asignación aleatoria de dos grupos de pacientes diabéticos obesos. La intervención educativa-participativa se organizó mediante el proceso de reflexión-acción. Se efectuaron mediciones del IMC basal y mensuales durante los 9 meses de la intervención educativa. Los grupos fueron controlados tomando en cuenta edad y sexo. El análisis estadístico se efectuó con el estadígrafo de t de students con diferencia de media para grupos relacionados. El grupo control logra un valor promedio de IMC basal de 33.89 ± 1.96 y al final de 33.2 ± 2.15 (t: 22.4; p: 0.16, el grupo de experimento con valor inicial de 33.63 ± 2.12 y final de 31.54 ± 1.71 (t: 11.55; p = 0.003. La intervención educativa participativa contribuye a mejorar el nivel de IMC en los diabéticos obesos 2.

Descending Necrotizing Mediastinitis Treated with Tooth Extractions following Mediastinal and Cervical Drainage

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Minoru Fukuchi

2015-10-01

Full Text Available Descending necrotizing mediastinitis (DNM is a rare condition in which oropharyngeal infection spreads to the mediastinum via the cervical fascia. Delayed diagnosis and surgery result in a high mortality rate among patients with DNM. We present a case of DNM resulting from odontogenic infection treated successfully with tooth extraction following mediastinal and cervical drainage. A 43-year-old, previously healthy Japanese man was admitted to our hospital for treatment of acute mediastinitis. Computed tomography revealed gas collection around the mid-thoracic esophagus and bilateral pleural effusion. We performed mediastinal drainage via right thoracotomy. Cervicotomy was performed on postoperative day 14 to drain a residual cervical abscess. The patient required the extraction of ten teeth over three procedures to address primary odontogenic infection before his fever resolved on postoperative day 40. Prompt diagnosis, aggressive drainage and removal of the source of infection can improve survival among patients with this life-threatening disease.

Descending necrotising mediastinitis: Case report

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Canan Eren

2010-12-01

Full Text Available Descending necrotising mediastinitis is a rare but usually fatal infection. It commonly results of oropharyngeal and odontogenic infections. Complete recovery may be achieved by early diagnosis, prompt medical and surgical approach. We are reporting our desending necrotizing mediastinitis case secondary to tooth abscess, and it’s successfull surgical treatment.A-48-year-old man admitted with fever, exhaustion neck distendion for a week. He had a tooth abscess one week ago. Chest tomography showed neck and mediastinal air and fluid collections. Antibiothreapy was started and urgent surgical management applied. Neck drainage was performed via transcervical approach. Mediastinal drainage was performed via right thoracotomy. Continue mediastinal washing feasibility was done by drainage tubes. Drainage was ended after nonextra drainage and cultural growthless. Vital signs became stable and control tomography showed complete recovery. He was healthfull at the 6th month’s follow-up.Broad antibiothreapy, surgical management are the main approaches for descending necrotising mediastinitis. The most common surgical procedure is the combination of transcervical approach and thoracotomy. We suggest early and agressive surgical management for the complete recovery. J Clin Exp Invest 2010; 1(3: 228-231

CONTROL DE VIBRACIONES EN UNA VIGA GERBER UTILIZANDO AMORTIGUADORES DE MASA SINTONIZADOS

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LUIS A. LARA V.

2010-01-01

Full Text Available Una de las estrategias mas comúnmente usadas en el control estructural es la instalación de amortiguadores de masa sintonizados (AMS. Los amortiguadores de masa sintonizados consisten básicamente de una masa, un resorte y un amortiguador, los cuales son fijados en la estructura, sintonizando la frecuencia del amortiguador a una frecuencia particular de la misma, con el objetivo de hacer que el amortiguador absorba parte de la energía, disminuyendo la respuesta de la estructura frente a una carga dinámica. En el presente trabajo se analiza numéricamente por medio del software ANSYS, el número y la posición más eficiente de AMS, cuyos parámetros son obtenidos mediante las expresiones de Den Hartog y de Jangid, para una viga Gerber metálica. Los resultados obtenidos muestran reducciones en la respuesta dinámica máxima de la viga, superiores al 80% en los casos en que la excitación de la estructura era armónica y superiores al 45% en los casos en que la carga aplicada era aleatoria de tipo ruido blanco.

Mediastinitis after cardiac transplantation

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Noedir A. G. Stolf

2000-05-01

Full Text Available OBJECTIVE: Assessment of incidence and behavior of mediastinitis after cardiac transplantation. METHODS: From 1985 to 1999, 214 cardiac transplantations were performed, 12 (5.6% of the transplanted patients developed confirmed mediastinitis. Patient's ages ranged from 42 to 66 years (mean of 52.3±10.0 years and 10 (83.3% patients were males. Seven (58.3% patients showed sternal stability on palpation, 4 (33.3% patients had pleural empyema, and 2 (16.7% patients did not show purulent secretion draining through the wound. RESULTS: Staphylococcus aureus was the infectious agent identified in the wound secretion or in the mediastinum, or both, in 8 (66.7% patients. Staphylococcus epidermidis was identified in 2 (16.7% patients, Enterococcus faecalis in 1 (8.3% patient, and the cause of mediastinitis could not be determined in 1 (8.3% patient. Surgical treatment was performed on an emergency basis, and the extension of the débridement varied with local conditions. In 2 (16.7% patients, we chose to leave the surgical wound open and performed daily dressings with granulated sugar. Total sternal resection was performed in only 1 (8.3% patient. Out of this series, 5 (41.7% patients died, and the causes of death were related to the infection. Autopsy revealed persistence of mediastinitis in 1 (8.3% patient. CONCLUSION: Promptness in diagnosing mediastinitis and precocious surgical drainage have changed the natural evolution of this disease. Nevertheless, observance of the basic precepts of prophylaxis of infection is still the best way to treat mediastinitis.

Mediastinal tumors. Update 1995

International Nuclear Information System (INIS)

Wood, D.E.; Thomas, C.R. Jr.

1995-01-01

This volume represents the premier work devoted solely to the complex myriad of mediastinal tumors. The contributors to the state-of-the-art text are clinical investigators of international renown. The diagnosis, natural history, and therapeutic strategies in respect of all mediastinal tumors are thoroughly addressed in a concise and logical manner. An emphasis on the multidisciplinary nature of mediastinal tumors is thematic throughout the text. Moreover, the combined-modality treatment schemes that have been increasingly developed worldwide are analyzed. This textbook will prove of value to all general surgeons, thoracic surgeons, medical oncologists, radiation oncologists, pulmonologists, and endocrinologists, as well as to nursing and medical students, residents and fellows-in training. (orig.). 55 figs., 21 tabs

Acute myocardial infarction after mediastinal radiotherapy

International Nuclear Information System (INIS)

Gagliardi, Juan; Tezanos Pinto, Miguel; Avalos, Adolfo; Sarubbi, Augusto; Padilla, Lucio; Espinosa, Daniel

2004-01-01

Mediastinal radiotherapy can affect the heart and great vessels to different degrees. It may turn up as coronary heart disease and less frequently as acute myocardial infarction. We report the case of a patient without coronary risk factors and an antecedent of mediastinal radiotherapy for Hodgkin's lymphoma. Considerations about mediastinal radiation as a risk factor for early development of coronary heart diseases are exposed. (author) [es

Celulitis gangrenosa cervical complicada con mediastinitis: Caso clínico

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S. Aboul-hosn Centenero

2003-12-01

Full Text Available Presentamos un caso clínico de celulitis gangrenosa cervical de origen odontógeno que progresó al espacio mediastínico, comentando la importancia de un tratamiento precoz y agresivo (quirúrgico y antibioterapia endovenosa. Discutimos la necesidad de realizar sistemáticamente traqueostomía, así como el momento de llevar a cabo la exodoncia de las piezas causantes del proceso infeccioso.This is the presentation of a case of cervical necrotizing celullitis which spreads to the mediastinic space, resulting from direct extensión, with an odontogenic origin. Our aims are to explain the importance of a rapid and agressive treatment (surgical and antibiotherapy. We shall discuss the necessity of givin the tracheostomy in all cases, as well as the treatment of extraction of the tooth when is the cause of the infection.

Relación de caries dental y el índice de masa corporal en niños de edad preescolar

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Mónica Vianey-García-Padilla

2013-01-01

Full Text Available La caries dental sigue siendo un problema con alta prevalencia así como el sobrepeso y la obesidad en los preescolares de México. Objetivo: determinar la relación de Caries Dental y el Índice de Masa Corporal en los preescolares. Material y métodos: se realizó un estudio transversal con una muestra de 348 preescolares del municipio de Tepatitlán Jalisco, midiéndose el Índice de masa corporal, Índice de caries dental, el índice de higiene oral simplificado y los momentos de azúcar/día. Resultados: se observó que en los 348 niños se encontró una prevalencia de caries del 75.3% con solo un 0.4 ±0.05 de dientes obturados; el 56.3 % estuvieron dentro del peso normal y 43.7% se encontraron con problemas de nutrición. Los niños que presentaron índice de caries más alto fueron los eutróficos y los de obesidad grave presentaron más lesiones cariosas. Sin embargo, los niños en sobrepeso y obesidad son los que tuvieron menores porcentajes de lesiones cariosas. Conclusiones: no existe una relación significativa entre la caries dental y el índice de masa corporal en el grupo estudiado, sin embargo, la prevalencia de caries y problemas nutricionales en los niños de edad preescolar son altos. Observándose que con un aumento del índice de higiene oral existe un aumento en el índice de caries siendo así de gran importancia fomentar cuidados orales preventivos y una atención dental temprana

A case of Candida mediastinitis after dental extraction.

Science.gov (United States)

Badiee, Parisa; Alborzi, Abdolvahab; Farhoudi, Farimah

2011-02-01

Acute mediastinitis is a serious infection involving the connective mediastinal tissue in the interpleural spaces and other thoracic structures. Candida albicans mediastinitis is a rare clinical entity associated with high mortality and morbidity. We present a rare case of a previously healthy and immunocompetent man with Candida mediastinitis due to retropharyngeal abscess after dental extraction, who presented with odynophagia and fever. Antibiotics were prescribed and surgical drainage was performed after diagnosis of mediastinitis by CT scan; however, the patient remained febrile.  The second culture obtained during irrigation of the mediastinum was positive for Candida albicans and the patient was responsive to antifungal therapy and survived. This case illustrates the need to consider a fungal cause in immunocompetent patients with mediastinitis who are not responsive to broad spectrum antibiotics and surgical drainage.

Aspergillus mediastinitis after cardiac surgery

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Marie-Josée Caballero

2016-03-01

Conclusion: The clinical features of postoperative Aspergillus mediastinitis may be paucisymptomatic, emphasizing the need for a low index of suspicion in cases of culture-negative mediastinitis or in indolent wound infections. In addition to surgical debridement, the central component of antifungal therapy should include amphotericin B or voriconazole.

Mediastinal and bronchovascular amyloidosis

International Nuclear Information System (INIS)

Biggemann, M.; Hilweg, D.; Kappes, R.

1990-01-01

The clinical and radiographic aspects of an unusual case of mediastinal and bronchovascular amyloidosis are presented. Besides hilar and mediastinal lymphadenopathy, extensive amyloid deposition in the peribronchial and perivascular connective tissue sheats can be observed. Plain film radiographs and CT demonstrate an uncommon pattern of increased bronchovascular markings, which is discussed. Because of peribronchial amyloid deposits, bronchoscopy is of no help in demonstrating this special type of tracheobronchial amyloidosis. (orig.) [de

Protective pneumothorax in CT monitored mediastinal puncture

International Nuclear Information System (INIS)

Wein, B.B.; Dickgreber, N.J.; Guenther, R.W.

1997-01-01

Purpose: To achieve an extrapulmonary pathway for biopsy of mediastinal masses. Methods: In 6 patients a protective, temporary pneumothorax was established before performing large-bore needle biopsies of mediastinal masses using a Verres-needle. Results: Transpleural, extrapulmonary access was easy to achieve. One patient developed a tension pneumothorax after biopsy which was drained by percutaneous small chest tube. Another patient showed mediastinal tumour bleeding through the biopsy needle. As a prophylactic measure the bleeding was stopped by injection of tissue glue through the biopsy needle. Conclusion: The use of protective pneumothorax allows cutting needle biopsies of mediastinal masses where aspiration cytology yields no secure specific diagnosis. (orig.) [de

Tuberculosis-associated Fibrosing Mediastinitis: Case Report and Literature Review

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Ronald Tan

2016-01-01

Full Text Available Fibrosing mediastinitis is a rare condition defined by the presence of fibrotic mediastinal infiltrates that obliterate normal fat planes. It is a late complication of a previous granulomatous infection, such as histoplasmosis or tuberculosis (TB. Due to its rarity, fibrosing mediastinitis is often under-recognized, and the clinical presentation is variable and dependent on the extent of infiltration or encasement of structures within the mediastinum. We present a case of fibrosing mediastinitis in a man with a prior history of TB, who presented with progressive dyspnea and was found to have chronic mediastinal soft tissue opacities and pulmonary hypertension. His diagnosis was delayed due to the lack of recognition of this clinical/radiographic entity. Fibrosing mediastinitis is a rare entity usually caused by granulomatous disease. Most cases develop as a late complication of histoplasmosis or TB. The presence of calcified mediastinal soft tissue infiltrates on advanced chest imaging can be diagnostic of fibrosing mediastinitis in patients with a prior history of a granulomatous infection once active processes such as malignancy are excluded.

Tuberculosis-associated Fibrosing Mediastinitis: Case Report and Literature Review.

Science.gov (United States)

Tan, Ronald; Martires, Joanne; Kamangar, Nader

2016-01-01

Fibrosing mediastinitis is a rare condition defined by the presence of fibrotic mediastinal infiltrates that obliterate normal fat planes. It is a late complication of a previous granulomatous infection, such as histoplasmosis or tuberculosis (TB). Due to its rarity, fibrosing mediastinitis is often under-recognized, and the clinical presentation is variable and dependent on the extent of infiltration or encasement of structures within the mediastinum. We present a case of fibrosing mediastinitis in a man with a prior history of TB, who presented with progressive dyspnea and was found to have chronic mediastinal soft tissue opacities and pulmonary hypertension. His diagnosis was delayed due to the lack of recognition of this clinical/radiographic entity. Fibrosing mediastinitis is a rare entity usually caused by granulomatous disease. Most cases develop as a late complication of histoplasmosis or TB. The presence of calcified mediastinal soft tissue infiltrates on advanced chest imaging can be diagnostic of fibrosing mediastinitis in patients with a prior history of a granulomatous infection once active processes such as malignancy are excluded.

Análisis de la masa ósea periprotésica en prótesis total de rodilla tras tratamiento con denosumab: resultados clínicos y densitométricos /

OpenAIRE

González Rodríguez, José Carlos,

2017-01-01

Introducción: La masa ósea periprotésica (MOP) tras la implantación de una prótesis de rodilla (ATR) se ve disminuida por diferentes factores y puede ser causa de complicaciones como fracturas periprotésicas y, a largo plazo, de aflojamientos asépticos con necesidad de ser revisadas quirúrgicamente. La fijación inicial de una prótesis articular es de vital importancia en su supervivencia a largo plazo. En caso de que esta fijación sea deficitaria o no se produzca, la superficie ósea sufre un ...

Análisis de la masa ósea periprotésica en prótesis total de rodilla tras tratamiento con denosumab. resultados clínicos y densitométricos

OpenAIRE

González Rodríguez, José Carlos

2017-01-01

INTRODUCCIÓN La masa ósea periprotésica (MOP) tras la implantación de una prótesis de rodilla(ATR) se ve disminuida por diferentes factores y puede ser causa de complicaciones como fracturas periprotésicas y, a largo plazo, de aflojamientos asépticos con necesidad de ser revisadas quirúrgicamente. La fijación inicial de una prótesis articular es de vital importancia en su supervivencia a largo plazo. En caso de que esta fijación sea deficitaria o no se produzca, la superficie ósea sufre u...

A study on pulmonary hilar and mediastinal lymphoscintigraphy

International Nuclear Information System (INIS)

Matsuo, Michimasa; Ushio, Keiji; Nishiyama, Shoji; Kono, Michio; Takada, Yoshiki

1979-01-01

A routine examination of pulmonary hilar and mediastinal lymphoscintigraphy is tried in this study in order to visualize pulmonary hilar and mediastinal lymphnodes routinely. A method is as follows; 30 - 50 μCi of 198 Au-colloid (0.3 - 0.5 ml of total volume) is injected through the needle of flexible bronchofiberscope into the mucosal membrane or submucosal membrane of the bilateral B 8 or B 9 bronchi. This method was applied to 11 cases of suspected pulmonary carcinoma and gave good results. In case of bronchitis, lung abscess and chronic pneumonia, carinal lymphnodes (which are expected to be as the inferior tracheo-bronchial lymphnodes) and one or more right mediastinal lymphnodes (which are expected to be as the right superior tracheo-bronchial or right paratracheal lymphnodes) were clearly visualized from 24 to 27 hours after the injection. In these cases the pulmonary hilar and mediastinal lymphnodes were expected to be intact on x-rays and CT findings. Among cases of pulmonary carcinoma or lymphangitis carcinomatosa, on the contrary, right mediastinal lymphnodes were not visualized in case with the right hilar lymphnodes involvement, and furthermore neither carinal nor right mediastinal lymphnodes were visualized in case with carinal lymphnodes involvements on X-rays, CT, operation or autopsy findings. From these results, the pulmonary hilar and mediastinal lymphoscintigraphy may give the useful information for the treatment planning, and follow up study of the cases of pulmonary and mediastinal malignant tumors. (author)

Influencia de la resistencia eléctrica en la estimación del agua corporal total y la masa libre de grasa

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Maraelys Morales González

2013-10-01

Full Text Available Se realizó un estudio transversal y controlado, a fin de evaluar la influencia de los valores no corregidos y corregidos de la resistencia eléctrica, medidos con los analizadores Bodystat® 1500-MDD y BioScan® 98 en el agua corporal total y la masa libre de grasa, de 31 sujetos aparentemente sanos y 31 niños con diferentes afecciones, atendidos en el Servicio de Oncohematología del Hospital Infantil Sur de Santiago de Cuba, desde septiembre hasta octubre del 2009. Se emplearon 2 ecuaciones por cada parámetro biológico, y como criterio estadístico la prueba t de student de 2 medias de muestras apareadas. La diferencia entre los valores no corregidos y corregidos de la resistencia eléctrica no influyó significativamente en los 2 parámetros biológicos; por tanto, es posible usarlos indistintamente para estimar el agua corporal total y la masa libre de grasa en individuos aparentemente sanos y pacientes con diferentes enfermedades.

Effects of mediastinal irradiation on oesophageal function

Energy Technology Data Exchange (ETDEWEB)

Yeoh, E.; Holloway, R.H.; Russo, A.; Tippett, M.; Bermingham, H.; Chatterton, B.; Horowitz, M. [Royal Adelaide Hospital, SA (Australia)

1996-02-01

Although it is well recognised that oesophageal symptoms are common during therapeutic irradiation of intrathoracic malignant diseases, the effects of mediastinal irradiation on oesophageal function are poorly defined. To clarify the pathogenesis of these sequelae a prospective study was performed to document comprehensively the effects of mediastinal irradiation on oesophageal function. Oesophageal symptoms, barium swallow, endoscopy, and combined radionuclide scintigraphy and oesophageal manometry were evaluated in eight patients with potentially curable intrathoracic malignant disease before treatment, during the last week of mediastinal irradiation, and six to eight weeks after its completion. Before irradiation, structural abnormalities were excluded by barium swallow and endoscopy. All but one patient experienced odynophagia or dysphagia, or both, during mediastinal irradiation (p<0.001) but endoscopic abnormalities were observed in only three patients and there was no correlation between oesophageal symptoms and endoscopic changes. Irradiation, however, had no significant effect on oesophageal motility or transit. It is concluded that oesophageal symptoms which develop during mediastinal irradiation are not a result of altered oesophageal motility or transit and may reflect increased mucosal sensitivity. (author).

Modelo de negocio para optimizar las estrategias productivas de personalización en masa

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Luis Miguel Arroyo Gutierrez

2015-01-01

Full Text Available Objeto: Describir un modelo general de proceso y negocio de personalización en masa. Destacar los elementos claves para llevar a cabo la personalización en masa como estrategia productiva principal o complementaria de una empresa. El  modelo propuesto se basa en una revisión exhaustiva de la literatura y se define en su completa dimensión, describiendo diferentes etapas, elementos, interrelaciones y flujos de información; ofreciendo una perspectiva global hasta ahora inexistente en la literatura. Diseño/metodología: Se ha llevado una exhaustiva revisión de la literatura y no se ha encontrado un modelo o estructura del proceso de personalización en masa universalmente aceptada, ni tampoco una estructura amplia y de conjunto, que cubra y describa el proceso completo y pueda asimilarse a un modelo de negocio. Sin embargo en la literatura se ofrecen cinco enfoques parciales y diferentes  en las que los autores se han basado para proponer un  modelo de negocio integrado de personalización. Aportaciones y resultados: En este trabajo se ha definido y desarrollado el proceso general de  implantación de la personalización en masa en tres etapas, enfatizando las iteraciones que existen entre las ellas que le convierten en proceso retroalimentado. Se ha encontrado que el modelo resulta especialmente útil en la generación de valor. El modelo expone los principios para identificar el valor y como la generación de valor refleja la particularidad de la personalización en masa frente a otras estrategias Limitaciones: El modelo de negocio presentado es teórico, por ello es interesante desarrollar un contraste empírico. Así mismo, al ser un modelo de aplicación general no ha sido posible entrar en las peculiaridades de cada industria. Implicaciones prácticas: La estrategia productiva de personalización en masa permite la generación de valor ofreciendo productos que satisfacen preferencias individuales, con costes y eficiencias similares

Computed tomography of the mediastinal teratoma

International Nuclear Information System (INIS)

Byun, Hong Sik; Im, Jung Gi; Han, Man Chung

1984-01-01

Computed tomographic findings in fifteen cases of anterior mediastinal teratoma are presented and compared with radiographic, and pathologic findings. Specific CT characteristics of anterior mediastinal teratoma are predominantly fatty mass with a denser dependent element and globular calcification in a solid protuberance into the cystic cavity. Six cases presented above described characteristic CT findings. Four cases presented water density mass with surrounding thick wall. Fat and calcific densities were present in nine and seven respectively, so these findings are frequently absent. Thick wall was present in all cases. So thick walled cyst even in the absence of fatty or calcific densities is highly suggestive of anterior mediastinal teratoma

Mediastinitis, a model of care. Experience in the General Hospital of Mexico over 34 years (1982–2016

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F.P. Navarro-Reynoso

2017-10-01

ás del diagnóstico oportuno el pronóstico dependerá de un abordaje sistemático temprano. Objetivo: Describir los resultados del tratamiento de la mediastinitis en un periodo de 34 años en un hospital escuela, su evolución y el modelo de atención vigente. Material y métodos: Estudio retrospectivo, descriptivo y transversal de pacientes con mediastinitis ingresados del 1 de junio de 1982 al 30 de julio de 2016. Las variables que se analizan son demográficas, clasificación y etiología de la mediastinitis, comorbilidades, complicaciones, días de estancia en hospital y en terapia intensiva y mortalidad. Resultados: Se incluye a 1880 pacientes de los cuales 1496 (79.6% fueron hombres. La edad promedio fue de 39.4 ± 17.8 años. Según la clasificación de Endo, 603 (32.1% correspondieron al tipo I y 1277 (67.9% a los tipos IIA y IIB. Según la etiología, en 910 casos fue de origen ondotogénico (48.4%, 526 por absceso retrofaríngeo (28%, 147 secundarios a absceso submandibular (7.8%, 49 a linfadenectomía cervical (2.6%, 36 a trauma faríngeo (1.9%, 14 a ruptura traqueal postintubación (0.7% y 198 de origen indeterminado (10.6%. Se realizó mediastinotomía con toracotomía derecha en 86% y con toracotomia izquierda en 14%. La traqueostomía simultánea se realizó en el 83% de los casos, estandarizándose desde el año 2005. La mortalidad varió por periodos siendo de 50% en 1982 a 1992, de 41% en 1992 a 2001, de 35% en 2002 a 2011 y de 17% en 2012 a 2016. Conclusión: A la par de una estandarización en el manejo de la mediastinitis, se observa un descenso en la mortalidad por esta causa con el pasar de los años. La madurez del modelo de atención que se propone responde entre otros a avances médico-científicos y a la experiencia acumulada en esta patología en más de tres décadas. Keywords: Mediastinitis, Thoracic surgery, Emergency surgery, Neck abscess, Palabras

Obtención de masas ovígeras del caracol lancetilla, Strombus pugilis (Mesogastropoda: Strombidae en condiciones de laboratorio

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Andrés Martín Góngora Gómez

2007-03-01

Full Text Available Se determinó la supervivencia, reproducción y el desarrollo embrionario del caracol Strombus pugilis, por un periodo de diez meses en condiciones de laboratorio. Siete progenitores fueron recolectados en Isla Contoy, Quintana Roo, México y posteriormente trasladados al laboratorio donde fueron colocados en acuarios de 80 l con agua de mar y alimentados con alimento granulado. Un total de 30 masas ovígeras fueron recolectadas, lográndose un aumento en el número de masas de huevos en abril. La longitud total estimada de una sola masa ovígera fue de 11.24 m, el número promedio de embriones encontrados en 2 cm fue de 264, obteniéndose un total de 157 500 embriones en toda la masa de huevos. Los resultados promedio de los parámetros físico-químicos a lo largo del periodo de estudio fueron los siguientes: salinidad de 37.5±0.5 ‰, pH 7.5±0.5 y temperatura de 28±0.2 °C. Con los datos aportados en este estudio se infiere que este sistema de mantenimiento y recirculación de los progenitores es excelente tanto para la reproducción como para la obtención de las masas ovígeras en condiciones controladas.Obtaining of egg masses of the snail, Strombus pugilis (Mesogastropoda: Strombidae under laboratory conditions. The survival, reproduction and embryonic development of Strombus pugilis, were determined during a period of ten months under laboratory conditions. Seven progenitors were collected in Contoy Island, Quintana Roo, Mexico and later transferred to the laboratory, where they were placed in aquarium with 80 l of sea water and fed with "pellets". A total of 30 egg masses were collected, one on September and the other on April. The estimated total length of one egg mass was 11.24 m; the mean number of embryos obtained per 2 cm was 264, obtaining an estimated total of 157 500 embryos in the egg mass. The means of the physical-chemical parameters during the study were: salinity 37.6±0.5 ‰, pH 7.5±0.5 and temperature 28±0.2 �

MASA syndrome : ultrasonographic evidence in a male fetus

NARCIS (Netherlands)

Pomili, G; Donti, GV; Carrozza, LA; Ardisia, C; Servidio, F; Hofstra, RMW; Gilardi, G; Donti, E

2000-01-01

The recent identification of a common etiology among MASA syndrome (McKusick 303300), X-linked hydrocephalus (HSAS) (McKusick 307000) and other related neurological disorders, which had previously been considered distinct nosological entities, allowed us to diagnose MASA syndrome in a male fetus in

Acute mediastinitis: multidetector computed tomography findings following cardiac surgery

International Nuclear Information System (INIS)

Macedo, Clarissa Aguiar de; Baena, Marcos Eduardo da Silva; Uezumi, Kiyomi Kato; Castro, Claudio Campi de; Lucarelli, Claudio Luiz; Cerri, Giovanni Guido

2008-01-01

Postoperative mediastinitis is defined as an infection of the organs and tissues in the mediastinal space, with an incidence ranging between 0.4% and 5% of cases. This disease severity varies from infection of superficial tissues in the chest wall to fulminant mediastinitis with sternal involvement. Diagnostic criterion for postoperative detection of acute mediastinitis at computed tomography is the presence of fluid collections and gas in the mediastinal space, which might or might not be associated with peristernal abnormalities such as edema of soft tissues, separation of sternal segments with marginal bone resorption, sclerosis and osteomyelitis. Other associated findings include lymphadenomegaly, pulmonary consolidation and pleural/ pericardial effusion. Some of these findings, such as mediastinal gas and small fluid collections can be typically found in the absence of infection, early in the period following thoracic surgery where the effectiveness of computed tomography is limited. After approximately two weeks, computed tomography achieves almost 100% sensitivity and specificity. Patients with clinical suspicion of mediastinitis should be submitted to computed tomography for investigating the presence of fluid collections to identify the extent and nature of the disease. Multidetector computed tomography allows 3D images reconstruction, contributing particularly to the evaluation of the sternum. (author)

Acute mediastinitis: multidetector computed tomography findings following cardiac surgery

Energy Technology Data Exchange (ETDEWEB)

Macedo, Clarissa Aguiar de [Universidade de Sao Paulo (USP), SP (Brazil). Faculdade de Medicina. Instituto do Coracao (InCor)]. E-mail: clarissaaguiarm@yahoo.com.br; Baena, Marcos Eduardo da Silva [Instituto do Coracao (InCor), Sao Paulo, SP (Brazil). Unit of Ultrasonography; Uezumi, Kiyomi Kato [Instituto do Coracao (InCor), Sao Paulo, SP (Brazil). Unit of Computed Tomography; Castro, Claudio Campi de [Instituto do Coracao (InCor), Sao Paulo, SP (Brazil). Unit of Magnetic Resonance Imaging; Lucarelli, Claudio Luiz [Instituto do Coracao (InCor), Sao Paulo, SP (Brazil). Center of Diagnosis; Cerri, Giovanni Guido [Universidade de Sao Paulo (USP), SP (Brazil). School of Medicine. Dept. of Radiology

2008-07-15

Postoperative mediastinitis is defined as an infection of the organs and tissues in the mediastinal space, with an incidence ranging between 0.4% and 5% of cases. This disease severity varies from infection of superficial tissues in the chest wall to fulminant mediastinitis with sternal involvement. Diagnostic criterion for postoperative detection of acute mediastinitis at computed tomography is the presence of fluid collections and gas in the mediastinal space, which might or might not be associated with peristernal abnormalities such as edema of soft tissues, separation of sternal segments with marginal bone resorption, sclerosis and osteomyelitis. Other associated findings include lymphadenomegaly, pulmonary consolidation and pleural/ pericardial effusion. Some of these findings, such as mediastinal gas and small fluid collections can be typically found in the absence of infection, early in the period following thoracic surgery where the effectiveness of computed tomography is limited. After approximately two weeks, computed tomography achieves almost 100% sensitivity and specificity. Patients with clinical suspicion of mediastinitis should be submitted to computed tomography for investigating the presence of fluid collections to identify the extent and nature of the disease. Multidetector computed tomography allows 3D images reconstruction, contributing particularly to the evaluation of the sternum. (author)

A modern definition of mediastinal compartments.

Science.gov (United States)

Carter, Brett W; Tomiyama, Noriyuki; Bhora, Faiz Y; Rosado de Christenson, Melissa L; Nakajima, Jun; Boiselle, Phillip M; Detterbeck, Frank C; Marom, Edith M

2014-09-01

Division of the mediastinum into compartments is used to help narrow the differential diagnosis of newly detected mediastinal masses, to assist in planning biopsy and surgical procedures, and to facilitate communication among clinicians of multiple disciplines. Several traditional mediastinal division schemes exist based upon arbitrary landmarks on the lateral chest radiograph. We describe a modern, computed tomography-based mediastinal division scheme, which has been accepted by the International Thymic Malignancy Interest Group as a new standard. This clinical classification defines a prevascular (anterior), a visceral (middle), and a paravertebral (posterior) compartment, with anatomic boundaries defined clearly by computed tomography. It is our intention that this definition be used in the reporting of clinical cases and the design of prospective clinical trials.

Relación entre la satisfación con la imagen corporal autoconcepto físico, índice de masa corporal y factores socioculturales en mujeres adolescentes costarricenses

Directory of Open Access Journals (Sweden)

Laura García Fernández

2007-12-01

Full Text Available El propósito del estudio fue analizar la relación entre la satisfacción con la imagen corporal (IC con el autoconcepto físico (AF, el índice de masa corporal (IMC y factores sociales, en una muestra de 99 mujeres (15,85 ñ0,98 años de edad e IMC de 21,62ñ3,09 kg/m2. Se utilizó: la escala de Stunkard y cols. (1983 para establecer la satisfacción con la IC; el cuestionario de Marsh y Southerlan (1994 para medir el AF general y sus dimensiones y otro cuestionario elaborado para esta investigación, donde se recopiló datos personales, sociales e indicadores de la composición corporal para el cálculo del IMC. Los resultados mostraron que el grupo de adolescentes satisfechas con su IC reportaron un puntaje promedio mayor en apariencia física pero menor en el AF general en comparación con las insatisfechas. Se encontró relación significativamente negativa entre IMC y la apariencia física. Por lo tanto se concluye que la muestra en estudio basa la satisfacción de su IC en relación con indicadores corporales como el peso, de manera que a menor peso más satisfechas están con su apariencia física e IC, por lo tanto, se le debe dar una orientación adecuada a esta muestra de sujetos para evitar que puedan caer en algún tipo de trastorno de alimentación, como método drástico para la reducción de peso.

Mammographic varicosities indicative of a superior mediastinal ...

African Journals Online (AJOL)

In addition, an abnormal calibre of the superficial veins can reflect not only underrying breast pathology, but a collateral venous return resulting from an upper mediastinal obstruction. A case mammographically demonstrating mammary varicosities resulting from a superior mediastinal syndrome is described. S. Afr. Med.

Spontaneous Atraumatic Mediastinal Hemorrhage

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Morkos Iskander BSc, BMBS, MRCS, PGCertMedEd

2013-04-01

Full Text Available Spontaneous atraumatic mediastinal hematomas are rare. We present a case of a previously fit and well middle-aged lady who presented with acute breathlessness and an increasing neck swelling and spontaneous neck bruising. On plain chest radiograph, widening of the mediastinum was noted. The bruising was later confirmed to be secondary to mediastinal hematoma. This life-threatening diagnostic conundrum was managed conservatively with a multidisciplinary team approach involving upper gastrointestinal and thoracic surgeons, gastroenterologists, radiologists, intensivists, and hematologists along with a variety of diagnostic modalities. A review of literature is also presented to help surgeons manage such challenging and complicated cases.

Costa Brava, los retos urbanísticos del turismo de masas: la huella de la ciudad jardín y algunos principios racionalistas en el tejido turístico de masas

OpenAIRE

Ramos Caravaca, Carolina

2013-01-01

Director: Joaquin Sabaté Bel El turismo de masas plantea un nuevo reto urbanístico a mitad del siglo XX. La Costa Brava adopta el modelo de ciudad jardín, utilizado durante el turismo de élite, e introduce aportaciones del Movimiento Moderno. La costa es un territorio de experimentación donde la ciudad jardín y el urbanismo moderno convergen. Pese a las dificultades de los primeros años de ensayo, los nuevos tejidos muestran parámetros propios, y la relación de los edificios con e...

Radiotherapy for mediastinal non-Hodgkin's lymphoma in children

International Nuclear Information System (INIS)

Masaki, Hidekazu

1985-01-01

Mediastinal non-Hodgkin's lymphoma in children is known to have an adverse prognosis, that is called ''lymphoblatic lymphoma''. Recently, chemotherapy for leukemia using multiple agents has been applied for non-Hodgkin's lymphoma in children, and this has improved relapse-free survival. Radiotherapy has been employed in order to reduce local recurrence. Two children received whole thoracic irradiation (10 Gy) who had mediastinal mass with malignant pleural effusion, then control of the effusion was achieved. Thereafter, radiation field was decreased in size to mantle field, and main tumor was treated to 30 Gy. In the course of treatment, mediastinal tumor was disappeared. Thereafter, radiation field was decreased in size to mantle field, and main tumor was treated to 30 Gy. In the course of treatment, mediastinal tumor was disappeared. For one child with only a mediastinal mass, mantle field was employed. He was treated to 30 Gy with chemotherapy. but he had CNS relapse. CNS prophylaxis is of considerable importance in this lymphoma according to the protocol of leukemia. (author)

Desarrollo de modelos matemáticos por bioimpedancia para estimación de la masa libre de grasa en sobrepeso y obesidad en individuos adultos de la población española

OpenAIRE

Carreira Arias, José

2011-01-01

[Resumen] Hipótesis: Implementar modelos matemáticos específicos y válidos para estimar masa libre de grasa (MLG) y masa grasa (MG) por impedancia bioeléctrica (BIA) en población española adulta con sobrepeso y obesidad como complemeto a la antropometría. Introducción: El aumento de la masa grasa corporal es el hecho definitorio de la obesidad; el estudio de la composición corporal humana se ocupa de la medición in vivo de los compartimentos y componentes del organismo y de su...

On invariant MASAs for endomorphisms of the Cuntz algebras

DEFF Research Database (Denmark)

Hong, Jeong Hee; Skalski, Adam; Szymanski, Wojciech

2010-01-01

The problem of existence of standard (i.e. product-type) invariant MASAs for endomorphisms of the Cuntz algebras O_n is studied. In particular, endomorphisms which preserve the canonical diagonal MASA D_n are investigated. Conditions on a unitary w equivalent to the fact that the corresponding...... endomorphism λ_w preserves D_n are found, and it is shown that they may be satisfied by unitaries which do not normalize D_n. Unitaries giving rise to endomorphisms which leave all standard MASAs invariant and have identical actions on them are characterized. Finally, some properties of examples of finite......-index endomorphisms of O_n given by Izumi and related to sector theory are discussed and it is shown that they lead to an endomorphism of O_2 associated to a matrix unitary which does not preserve any standard MASA....

Posterior mediastinal teratoma diagnosis by computerized tomography and ultrasonography

Energy Technology Data Exchange (ETDEWEB)

Choo, Yeon Myung; Im, Chung Kie; Yeon, Kyung Mo; Han, Man Chung [Seoul National University College of Medicine, Seoul (Korea, Republic of)

1984-09-15

Teratomas, usually arising in the anterior mediastinum, are very uncommon in the posterior mediastinum. Embryologic development of anterior mediastinal teratoma is thought to be from thymic anlage which descends from the third bronchial cleft and pouch, while that of posterior mediastinal teratoma is thought to be from the remnant of notochord. CT findings of posterior mediastinal teratomas are not different from teratomas elsewhere, containing fat, calcification, soft tissue and thick walled cyst. Ultrasonographic findings are mixed echogenic mass containing cystic portion, highly reflective solid portion and area of acoustic shadowing. Authors recently experienced 2 cases of surgically proven posterior mediastinal teratoma and report with review of literature.

Posterior mediastinal teratoma diagnosis by computerized tomography and ultrasonography

International Nuclear Information System (INIS)

Choo, Yeon Myung; Im, Chung Kie; Yeon, Kyung Mo; Han, Man Chung

1984-01-01

Teratomas, usually arising in the anterior mediastinum, are very uncommon in the posterior mediastinum. Embryologic development of anterior mediastinal teratoma is thought to be from thymic anlage which descends from the third bronchial cleft and pouch, while that of posterior mediastinal teratoma is thought to be from the remnant of notochord. CT findings of posterior mediastinal teratomas are not different from teratomas elsewhere, containing fat, calcification, soft tissue and thick walled cyst. Ultrasonographic findings are mixed echogenic mass containing cystic portion, highly reflective solid portion and area of acoustic shadowing. Authors recently experienced 2 cases of surgically proven posterior mediastinal teratoma and report with review of literature.

Multi drug resistant tuberculosis presenting as anterior mediastinal mass

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Parmarth Chandane

2016-01-01

Full Text Available Enlargement of the mediastinal lymphatic glands is a common presentation of intrathoracic tuberculosis (TB in children. However, usually, the mediastinal TB nodes enlarge to 2.8 ± 1.0 cm. In this report, we describe a case of anterior mediastinal lymphnode TB seen as huge mass (7 cm on computed tomography (CT thorax without respiratory or food pipe compromise despite anterior mediastinum being an enclosed space. CT guided biopsy of the mass cultured Mycobacterium TB complex which was resistant to isoniazide, rifampicin, streptomycin ofloxacin, moxifloxacin, and pyrazinamide. Hence, we report primary multi drug resistant TB presenting as anterior mediastinal mass as a rare case report.

Hypervascular mediastinal masses: Action points for radiologists

International Nuclear Information System (INIS)

Cabral, Fernanda C.; Trotman-Dickenson, Beatrice; Madan, Rachna

2015-01-01

Highlights: •An algorithm combining clinical data and radiology features of hypervascular mediastinal masses is proposed to determine further evaluation and subsequently guide treatment. •Characteristic features and known association with syndromes and genetic mutations assists in achieving a diagnosis. •MRI and functional imaging can be very helpful in the evaluation of hypervascular mediastinal masses. •Identification of hypervascularity within mediastinal masses should alert the radiologist and clinician and an attempt should be made to preferably avoid percutaneous CT guided biopsies and attempt tissue sampling surgically with better control of post procedure hemorrhage. -- Abstract: Hypervascular mediastinal masses are a distinct group of rare diseases that include a subset of benign and malignant entities. Characteristic features and known association with syndromes and genetic mutations assist in achieving a diagnosis. Imaging allows an understanding of the vascularity of the lesion and should alert the radiologist and clinician to potential hemorrhagic complications and avoid percutaneous CT guided biopsies. In such cases, pre-procedure embolization and surgical biopsy maybe considered for better control of post procedure hemorrhage. The purpose of this article is to describe and illustrate the clinical features and radiologic spectrum of hypervascular mediastinal masses, and discuss the associated clinical and genetic syndromes. We will present an imaging algorithm to determine further evaluation and subsequently guide treatment

Hypervascular mediastinal masses: Action points for radiologists

Energy Technology Data Exchange (ETDEWEB)

Cabral, Fernanda C.; Trotman-Dickenson, Beatrice; Madan, Rachna, E-mail: rmadan@partners.org

2015-03-15

Highlights: •An algorithm combining clinical data and radiology features of hypervascular mediastinal masses is proposed to determine further evaluation and subsequently guide treatment. •Characteristic features and known association with syndromes and genetic mutations assists in achieving a diagnosis. •MRI and functional imaging can be very helpful in the evaluation of hypervascular mediastinal masses. •Identification of hypervascularity within mediastinal masses should alert the radiologist and clinician and an attempt should be made to preferably avoid percutaneous CT guided biopsies and attempt tissue sampling surgically with better control of post procedure hemorrhage. -- Abstract: Hypervascular mediastinal masses are a distinct group of rare diseases that include a subset of benign and malignant entities. Characteristic features and known association with syndromes and genetic mutations assist in achieving a diagnosis. Imaging allows an understanding of the vascularity of the lesion and should alert the radiologist and clinician to potential hemorrhagic complications and avoid percutaneous CT guided biopsies. In such cases, pre-procedure embolization and surgical biopsy maybe considered for better control of post procedure hemorrhage. The purpose of this article is to describe and illustrate the clinical features and radiologic spectrum of hypervascular mediastinal masses, and discuss the associated clinical and genetic syndromes. We will present an imaging algorithm to determine further evaluation and subsequently guide treatment.

Cervico mediastinal necrotizing Cellulitis

International Nuclear Information System (INIS)

Taruselli, R.; Moure, L.; Delbene, R.; Morelli, R.; Maestro, M.

2003-01-01

Case history consisted of 2 patients suffering from dental origin Cervico-Mediastinal a Necrotizing Cellulitis.As a first step the authors proceeded to analyze two dissemination paths, the more frequent etiologies and clinical presentation.Cervico-thoracic CT scanning was deemed to be the best line of detection for mediastinal involvement exploration.This was followed by a debate as to which should be the surgical approach, whether cervical o cervicothoracic, the conclusion being that the best procedure would be the video thorascopic approach in experienced hands.The conclusion was than and early diagnosis was paramount, to be followed by emergency treatment.Only thus is it possible to prevent the high mortality attached to this condition

MR imaging of mediastinal foregut cysts

International Nuclear Information System (INIS)

LeBlanc, J.; Guttentag, A.R.; McLoud, T.C.; Shepard, J.O.

1991-01-01

This paper reports on the diagnosis of mediastinal foregut cysts which are difficult to establish even with CT, because these lesions often have high attenuation numbers similar to tumors. This study was undertaken to determine the value of MR imaging in the diagnosis of foregut cysts. MR imaging of 58 mediastinal masses was performed between 1986 and 1991 at 0.5 T, with T1- and T2-weighted images obtained. Seven foregut cysts were identified. Five were pathologically proven; in two cases the diagnosis was based on clinical findings and radiologic stability. Signal characteristics were compared with those of 52 pathologically proven mediastinal masses: six thymomas, 10 thyroid goiters and carcinomas, 11 neurogenic tumors, 15 lymphomas, and 10 miscellaneous masses. Fat and muscle were used as internal standards of signal intensity (SI). All foregut cysts were very bright on T2-weighted images. On T1-weighted sequences, two had low SI, but the remaining five showed high SI. These differences reflected variability in cyst protein content, high SI indicating the presence of mucus. On T1-weighted images, low SI was identified in most other mediastinal masses, but uniform high SI was specific for foregut cysts. Our series did not include any fatty lesions, as these were easily recognized on CT scans

CT imaging of collaterals in stenoses of large mediastinal veins

International Nuclear Information System (INIS)

Goerich, J.; Flentje, M.; Gueckel, F.; Beyer-Enke, S.A.; Kaick, G. van; Heidelberg Univ.

1988-01-01

Scans of angio-computed tomography (CT) of 53 patients suffering from mediastinal space-occupying growths were reviewed: 16 patients showed stenosis of mediastinal veins with demonstration of subcutaneous venous channels, 17 showed an obstruction without collateral pathways and 20 patients had normal mediastinal vessels. Two thirds of the cases with external vein compression were caused by bronchogenic carcinoma. The degree of obstruction in patients showing collateral circulation was between 70 and 100 percent and significantly greater than in patients without collaterals (40%). The most important collaterals bypassing the upper mediastinal veins are discussed. (orig.) [de

Imaging findings of mediastinal tuberculous lymphadenopathy in AIDS

International Nuclear Information System (INIS)

Zhao Dawei; Yuan Chunwang; Zhang Lijie; Jin Erhu; Ma Daqing

2005-01-01

Objective: To evaluate X-ray, CT and MRI features of mediastinal tuberculosis in AIDS. Methods: Images (including X-ray; CT and MRI) of 9 patients with AIDS associated hilar and mediastinal lymphonode tuberculosis were analysed retrospectively. All the cases were performed with chest X-ray and CT scan, of which 5 with enhanced CT scan and 1 with MRI. Results: In the hilar and mediastinal lymphonode tuberculosis complicated by AIDS, the enlarged lymph nodes were mostly located in region 7 (100%, 9/9), 77.8% cases (7/9) were in 4R and 55.6% (5/9) were in 2R. Conclusion: The imaging findings of hilar and mediastinal lymphonode tuberculosis in AIDS is characterized by the enlarged lymphnodes that can fuse together and encroach on the tissues outside the lymph nodes. CT and MRI scans are extraordinarily helpful to the diagnosis of such diseases. (authors)

Primary Mediastinal Liposarcoma

African Journals Online (AJOL)

MDM2 positive, confirming a well-differentiated liposarcoma grade 1 (according FNLCC). The immediate post-operative period was marked by an infection of the surgical site without mediastinitis. This was managed locally and with antibiotics. Adjuvant radiotherapy is ongoing. Written informed consent was obtained from ...

Cryptogenic organising pneumonia presenting with bilateral hilar and mediastinal lymphadenopathy.

Science.gov (United States)

Kahraman, Hasan; Tokur, Mahmut; Sayar, Hamide; Inci, Mehmet Fatih

2013-06-10

Cryptogenic organising pneumonia is not considered in the differential diagnosis of bilateral hilar and mediastinal lymphadenopathy. We submitted a patient presenting with bilateral hilar and mediastinal lymphadenopathy. We suspected diagnosis of sarcoidosis, but the patient was diagnosed as cryptogenic organising pneumonia with the histological result. This is the second case report of cryptogenic organising pneumonia presenting with bilateral hilar and mediastinal lymphadenopathy.

Propiedades de textura de masa y pan dulce tipo "concha" fortificados con proteínas de suero de leche Propriedades de textura de massa e de pão doce tipo concha fortificados com proteínas do soro de leite

Directory of Open Access Journals (Sweden)

Norma Güemes Vera

2009-03-01

Full Text Available La fortificación de alimentos es importante debido a una creciente población en estado de malnutrición, por las sequías provocadas a nivel mundial y por personas de bajos recursos económicos. La adición de proteínas puede causar problemas tecnológicos. Por ello, el objetivo de este trabajo fue determinar el efecto de la adición de proteínas de lactosuero a pan dulce tipo "concha" sobre las propiedades químicas y de texturas de las masas y panes. Se planteó un experimento con diferentes concentraciones de suero comercial y precipitado por calor, se evaluó la adhesividad y el análisis del perfil de textura en masa y panes. Los resultados indicaron que el testigo presentó menor contenido de proteína (17.2 ± 0.01% con respecto a los panes con 10% (19.8 ± 0.01 y 15% (22.9 ± 0.03 de suero comercial y precipitados por calor, el contenido de grasa fue similar en el testigo (7.01 ± 0.02 y en los panes con suero comercial (7.29 ± 0.04% y precipitado por calor (7.37 ± 0.01, el mayor trabajo de adhesión se presentó al 10% de suero comercial, mientras que los tratamientos a base de suero tuvieron valores intermedios. La firmeza fue mayor (p 0.05 entre los porcentajes de suero. Existe un efecto del tipo y concentración de suero en la adhesividad de las masas. Respecto a la textura de los panes, el suero precipitado por calor tuvo características aceptables en comparación con el suero comercial.A fortificação de alimentos é importante devido a uma população crescente em estado de má nutrição. A adição de proteínas pode causar problemas tecnológicos. Por essa razão, o objetivo deste trabalho foi determinar o efeito da adição de soro de leite a formulações de pães tipo concha nas propriedades químicas e na textura das massas. Foram utilizadas diferentes concentrações de um soro comercial e de outro soro obtido por processo de precipitação por calor. Foi avaliado o perfil de textura da massa e dos pães. Os

Causas, características e impacto de los procesos de remoción en masa, en áreas contrastantes de la región Andina

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Martin Mergili

2015-07-01

Full Text Available Las remociones en masa son agentes geomorfológicos comunes en la región Andina, las cuales pueden producir desastres, cuya ocurrencia y propiedades son determinadas por la interacción de varios factores geológicos, topográficos, climáticos y las actividades antropogénicas. La comprensión de sus características se beneficia de estudios comparativos sobre áreas climáticas, geomorfológicas y socioeconómicas. Colombia, con su clima húmedo tropical y una alta densidad poblacional, es uno de los puntos globales de más alto riesgo de remociones en masa, como deslizamientos y flujos, accionados por La Niña o la actividad de volcanes glaciados, los cuales contrastan con las caídas de rocas y flujos detríticos en el árido y escasamente poblado centro-oeste argentino, donde los eventos son generalmente asociados a El Niño.

Multitudes católicas, sociedad de masas y política en la Argentina. Reflexiones a partir del Congreso Eucarístico Nacional de 1940

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Diego Mauro

2017-01-01

Full Text Available El presente artículo aborda la conformación de multitudes católicas durante el Congreso Eucarístico Nacional de 1940, celebrado en la ciudad de Santa Fe (Argentina, desde una perspectiva sociocultural que destaca la multidimensionalidad del fenómeno y los vínculos entre el catolicismo y la sociedad de masas. Con dicho fin, el Congreso es analizado a través de diferentes claves: la cultura de masas, la industria del turismo, el discurso publicitario, el consumo, la lógica del espectáculo. Finalmente, a la luz de los resultados obtenidos, se ensaya un análisis de la dimensión política, con el propósito de comprender el modo en que dichos procesos alimentaron la retórica del “mito de la nación católica” y contribuyeron a fortalecer las posiciones de la Iglesia católica en la política argentina del siglo xx.

Construct validity and reliability of the Music Attentiveness Screening Assessment (MASA).

Science.gov (United States)

Waldon, Eric G; Broadhurst, Emily

2014-01-01

Music as alternate engagement (MAE) can be used effectively to distract children during painful or anxiety-provoking medical procedures. For such interventions to be successful, it would seem important to assess the degree to which a child can attend to musical stimuli. The purposes of this study were as follows: (a) To establish construct validity by determining the extent to which the Music Attentiveness Screening Assessment (MASA) measures auditory attention; and (b) to gather evidence regarding MASA test-retest and inter-observer reliability. The Auditory Attention (AA) subtest from the NEPSY-II (NEPSY, Second Edition) and the two items from MASA were administered to a nonclinical sample of children (N = 50) aged 5 to 9 years. There was a statistically significant proportion of AA score variance shared with MASA (both items), R (2) = .21, F(2, 47) = 6.34, p = .004. Test-retest reliability on the first MASA item was moderately high (Pearson r = .84) while on the second item it was lower (r = .63). Similarly, interobserver agreement was high for Item I (intraclass correlation coefficient [ICC] = .95) and lower for Item II (ICC = .71). Evidence suggests that MASA measures, at least in part, auditory attention. Despite this finding, a large proportion of unexplained variance remains. Furthermore, reliability estimates (test-retest and interobserver agreement) differ between both items. These findings are discussed with particular attention paid to the ways in which MASA should be revised and further study conducted. © the American Music Therapy Association 2014. All rights reserved. For permissions, please e-mail: journals.permissions@oup.com.

Usefulness of CT-guided trans-bronchial needle aspiration biopsy for mediastinal lymph nodes

International Nuclear Information System (INIS)

Cui Bing; Rong Fu

2001-01-01

Objective: To determine the nature of enlarged mediastinal lymph nodes, the study of CT-guided trans-bronchial needle aspiration biopsy (CT-TBNA) was conducted. Methods: According to classification and locating standard of mediastinal lymph nodes, CT-TBNA was performed in 158 mediastinal lymph nodes of 73 patients, including 54 primary lung cancer with enlarged mediastinal lymph nodes, 5 malignant lymphoma, 3 mediastinal abscess and 11 mediastinal inflammatory adenopathy. Results: CT confirmed that the needles were inside all 158 lymph nodes. Adequate aspirates for histologic and/or cytologic diagnosis were obtained in 136 of 158(86%) lymph node biopsies. No serious complications occurred. Conclusion: Locating standard of CT-guided TBNA was reliable. Puncture was safe and cost-effective. CT-TBNA was important for ascertaining the nature of mediastinal adenopathy and staging of neoplasms

Clasificación digital de masas nubosas a partir de imágenes meteorológicas usando algoritmos de aprendizaje de máquina

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Salomón Einstein Ramírez-Fernández

2014-01-01

Full Text Available La identificación exacta de nubes precipitantes es una tarea difícil. En el presente trabajo se aplicaron los algoritmos Máquinas de Soporte Vectorial, Árboles de Decisión y Bosques Aleatorios para discriminar entre nubes precipitantes y nubes no precipitantes, a partir de una imagen meteorológica del satélite GOES-13 que cubre el territorio colombiano. El objetivo del trabajo fue evaluar el desempeño de los algoritmos de aprendizaje de máquina (ML, para la clasificación digital de masas nubosas, en términos de la exactitud temática de la clasificación usando como referencia el algoritmo convencional distancia de Mahalanobis. Los resultados muestran que los algoritmos ML proporcionan una clasificación de masas de nubes más exacta que la obtenida por algoritmos convencionales. La mejor exactitud fue obtenida usando Bosques Aleatorios (RF, con una exactitud temática global de 97%. Adicionalmente, la clasificación obtenida con RF fue comparada pixel a pixel con estimaciones de precipitación de la NASA Tropical Rainfall Measurement Mission (TRMM obteniendo una exactitud global del 94%. De acuerdo con este estudio, los algoritmos ML pueden ser usados para mejorar los actuales métodos de identificación de nubes precipitantes.

Spontaneous Mediastinitis in a Ten-year-old Girl: A Case Report

International Nuclear Information System (INIS)

Cho, Kyung Eun; Kim, Ji Hong; Yoon, Choon Sik; Lee, Mi Jung; Kim, Myung Joon

2011-01-01

Acute suppurative mediastinitis is an uncommon, life threatening condition with a mortality rate of up to 40%. It is mainly caused by esophageal perforation or post-operative complications, and acute mediastinitis not caused by trauma or surgery is rare. To the best of our knowledge, no cases of spontaneous mediastinal abscess in children have been reported in the English medical literature. We report here on a case of an acute mediastinal abscess in a ten-year-old girl and there was no demonstrable clinical or radiologic etiology for infection

Spontaneous Mediastinitis in a Ten-year-old Girl: A Case Report

Energy Technology Data Exchange (ETDEWEB)

Cho, Kyung Eun; Kim, Ji Hong; Yoon, Choon Sik [Gangnam Severance Hospital, Yonsei University College of Medicine, Seoul (Korea, Republic of); Lee, Mi Jung; Kim, Myung Joon [Severance Hospital, Yonsei University College of Medicine, Seoul (Korea, Republic of)

2011-01-15

Acute suppurative mediastinitis is an uncommon, life threatening condition with a mortality rate of up to 40%. It is mainly caused by esophageal perforation or post-operative complications, and acute mediastinitis not caused by trauma or surgery is rare. To the best of our knowledge, no cases of spontaneous mediastinal abscess in children have been reported in the English medical literature. We report here on a case of an acute mediastinal abscess in a ten-year-old girl and there was no demonstrable clinical or radiologic etiology for infection

Gas-contrasted computed tomography for evaluation of mediastinal lesions

Energy Technology Data Exchange (ETDEWEB)

Mitsuoka, A; Reshad, K; Kitano, M; Ishii, S [Tenri Hospital, Nara (Japan)

1981-03-01

An application of gas-contrasted computed tomography (CT) was investigated for evaluation of mediastinal lesions. Findings of the gas-contrasted CT were compared with those of usual CT or conventional pneumomediastinography in nine patients with myasthenia gravis, four patients with mediastinal tumor, and five patients with other mediastinal lesions. As a result, the following results were obtained. 1) In examination for the thymus in myasthenia gravis, the shape of the thymus tissue was most accurately recognized by gas-contrasted CT, which enable one to discriminate the thymus tissue from the fatty tissue of the surrounding mediastinum with injected gas. 2) Gas-contrasted CT could most accurately evaluate adhesion or invasion of the mediastinal tumor to the surrounding organs. At the exact site of adhesion, injected gas to the mediastinum did not separate the tumor from the surroundings. Such diagnostic significance was considered to be available also to mediastinal lymphnode metastasis or suspected invasion of the malignant tumor from outside the mediastinum. 3) These findings of gas-contrasted CT were correlated well to those at operation. Hence, it was concluded that this diagnostic method presents good informations in assessing the resectability of the tumor or preoperative determination of the operation procedure. 4) However, it seemed difficult to distinguish between inflammatory (benign) adhesion and invasive (malignant) one even by gas-contrasted CT. 5) Finally, it was suggested that gas-contrasted CT might be widely adopted for clarification of lesions other than the mediastinal ones.

Gas-contrasted computed tomography for evaluation of mediastinal lesions

International Nuclear Information System (INIS)

Mitsuoka, Akio; Reshad, K.; Kitano, Morihisa; Ishii, Shoukei

1981-01-01

An application of gas-contrasted computed tomography (CT) was investigated for evaluation of mediastinal lesions. Findings of the gas-contrasted CT were compared with those of usual CT or conventional pneumomediastinography in nine patients with myasthenia gravis, four patients with mediastinal tumor, and five patients with other mediastinal lesions. As a result, the following results were obtained. 1) In examination for the thymus in myasthenia gravis, the shape of the thymus tissue was most accurately recognized by gas-contrasted CT, which enable one to discriminate the thymus tissue from the fatty tissue of the surrounding mediastinum with injected gas. 2) Gas-contrasted CT could most accurately evaluate adhesion or invasion of the mediastinal tumor to the surrounding organs. At the exact site of adhesion, injected gas to the mediastinum did not separate the tumor from the surroundings. Such diagnostic significance was considered to be available also to mediastinal lymphnode metastasis or suspected invasion of the malignant tumor from outside the mediastinum. 3) These findings of gas-contrasted CT were correlated well to those at operation. Hence, it was concluded that this diagnostic method presents good informations in assessing the resectability of the tumor or preoperative determination of the operation procedure. 4) However, it seemed difficult to distinguish between inflammatory (benign) adhesion and invasive (malignant) one even by gas-contrasted CT. 5) Finally, it was suggested that gas-contrasted CT might be widely adopted for clarification of lesions other than the mediastinal ones. (author)

Efecto de una dieta rica en proteínas y alta en fibra más la suplementación con aminoácidos de cadena ramificada sobre el estado nutricional de pacientes con cirrosis

Directory of Open Access Journals (Sweden)

A. Ruiz-Margáin

2018-01-01

Conclusión: La suplementación con AACR más una dieta alta en proteína y fibra es una intervención segura en los pacientes con cirrosis. Ayuda al incremento de la masa muscular y no eleva los niveles de amonio o de glucosa, y tampoco se asocia con el desarrollo de encefalopatía hepática.

Successful outcome of descending necrotizing mediastinitis due to neck trauma

International Nuclear Information System (INIS)

Kurowski, K.; Matuszek, I.; Nunez, C. F. M.

2011-01-01

Descending necrotizing mediastinitis (DNM) is an uncommon form of mediastinitis that can rapidly progress to septicemia. The optimal surgical approach still remains controversial. In this paper we would like to present a case of descending necrotizing mediastinitis that was treated successfully by means of thoracic drainage through trans-thoracic approach. In our case DNM occurred as a complication of oropharyngeal abscesses and a complication of cervical spine trauma. (authors)

Hematoma masivo esofágico con compromiso supraglótico: Reporte de un caso y revisión de la literatura

OpenAIRE

Pardo J,Javiera; Abarca A,Alfredo; Walker J,Katherine; Celedón L,Carlos

2010-01-01

Se presenta el caso de un paciente de 67 años de sexo masculino, hipertenso, diabético y usuario de aspirina en dosis anticoagulante, que consulta en el servicio de urgencia por un cuadro de inicio súbito de dolor retroesternal asociado a disnea severa y estridor. La evaluación mediante nasofibroscopfa muestra una gran masa supraglótica que obstruye el 80% del lumen, compatible con una masa esofágica. La tomograffa computarizada de tórax muestra una imagen compatible con un hematoma disecante...

Rare mediastinal leiomyoma in a child.

Science.gov (United States)

Hakeem, Zubair Ashraf; Rathore, Shyam Singh; Wahid, Abdul

2017-07-01

Leiomyoma of the mediastinum is rare. They are thought to arise from the smooth muscle cells of the media of mediastinal vascular structures and structure containing smooth muscle. Most mediastinal leiomyomas are seen in association with oesophagus in the posterior mediastinum. We present a case of huge leiomyoma in a 1.5 years old male child arising in the lower anterior mediastinum with compression of heart, liver and deformity of rib cage. Median sternotomy and a separate concomitant right mini-thoracotomy was done and tumor excised. Histopathology proved it to be a leiomyoma.

Management of large mediastinal masses: surgical and anesthesiological considerations

NARCIS (Netherlands)

Li, Wilson W. L.; van Boven, Wim Jan P.; Annema, Jouke T.; Eberl, Susanne; Klomp, Houke M.; de Mol, Bas A. J. M.

2016-01-01

Large mediastinal masses are rare, and encompass a wide variety of diseases. Regardless of the diagnosis, all large mediastinal masses may cause compression or invasion of vital structures, resulting in respiratory insufficiency or hemodynamic decompensation. Detailed preoperative preparation is a

Análisis de mejora en la productividad del proceso de fabricación de rosquitas empleando un prototipo de formado de masa

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Alvaro Humberto Velásquez Dávila

2014-12-01

Full Text Available Objetivos: Implementación de mejoras en la productividad del proceso de fabricación de rosquitas mediante el uso de un prototipo de máquina electromecánica de formado de tiras trenzadas para producir rosquitas. Métodos: En el proceso de fabricación del prototipo los diferentes componentes, como el largo y grosor del sin fin, la potencia de los moto reductores, la velocidad rotacional del tornillo y diferentes variables de operación, como temperatura de extrusión, humedad y temperatura inicial de la masas de rosquita, se modificaron a fin de encontrar las condiciones óptimas de operación para que la rosquita sea de excelente calidad y no varíe sus condiciones de sabor, forma y estructura reconocidas en el mercado. Resultados: Se diseñó un prototipo con un mecanismo de extrusión compuesto por un tornillo sin fin situado en una carcasa. En un extremo de dicha carcasa se ubica una tolva de alimentación de la masa de rosquita y por el otro se extruiría tiras por boquillas que al girarlas darían el trenzado de tiras requerido para el formado de la masa de rosquita. Se llevaron a cabo pruebas variando la humedad de la masa en 37, 30 y 26%, variando la temperatura de la masa y las revoluciones del tornillo sin fin. Conclusiones: Luego de las pruebas de humedad, temperatura y calidad, el mejor producto se obtuvo al utilizar una velocidad rotacional de 56 rpm, 26% de humedad y utilizando masa a 25° de temperatura. Asimismo, en términos económicos se ha logrado incrementar la productividad del negocio de rosquitas. Los costos de producción se han reducido en un 21% y el proyecto arroja un VAN positivo de S/. 7M.

Análisis de la dispersión axial de masa y calor en reactores de lecho fijo

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Rangel Jara Hermes Augusto

1997-01-01

Full Text Available Dentro del espíritu investigativo a nivel teórico del estudio de los reactores químicos, el presente trabajo desarrolla e implementa un análisis conceptual y numérico de los fenómenos de dispersión axial de calor y masa en reactores de lecho fijo. Se pretende disponer de una alternativa numérica que permita en una forma rápida y precisa la solución de las ecuaciones diferenciales junto con las respectivas condiciones de frontera del modelo matemático. Para la simulación del reactor de lecho fijo se empleó un modelo unidimensional pseudohomogeneo con parámetros aglomerados.

On conjugacy of MASAs and the outer automorphism group of the Cuntz algebra

DEFF Research Database (Denmark)

Conti, Roberto; Hong, Jeong Hee; Szymanski, Wojciech

2015-01-01

We investigate the structure of the outer automorphism group of the Cuntz algebra and the closely related problem of conjugacy of MASAs in O_n. In particular, we exhibit an uncountable family of MASAs, conugate to the standard MASA D_n via Bogolubov automorphisms, that are not inner conjugate to D_n....

Physicochemical properties of masa and corn tortilla made by ohmic ...

African Journals Online (AJOL)

Instant corn flour obtained by ohmic heating (OHICF) was used to prepare masa and tortillas. In this study, the effect of average particle size, moisture, and the final temperature on the physicochemical properties of masa and tortillas elaborated from OHICF was evaluated and were compared with flour obtained by the ...

Probable initial pulmonary lymphangioleiomyomatosis and mediastinal lymphangioleiomyoma

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M. Pontes

2014-03-01

Full Text Available A 68‐year‐old woman was submitted to a mediastinal lymphangioleiomyoma resection found in a follow‐up study of lower left lung resection due to bronchiectasis complicated by chylothorax. This led to a revaluation of the pulmonary specimen that revealed, in addition to inflammatory bronchiectasis, small spindle cell nodules in the lung parenchyma, similar to minute pulmonary meningothelial‐like nodules, but with smooth muscle actin immunohistochemical positivity. The possibility of initial pulmonary development of lymphangioleiomyomatosis is discussed. Resumo: Uma mulher de 68 anos foi submetida a uma ressecção de um linfangioleiomioma mediastinal observado na monitorização de uma lobectomia inferior esquerda devido a bronquiectasia, complicada por quilotórax. Isto levou a uma reavaliação do espécime pulmonar que revelou, além da bronquiectasia inflamatória, nódulos pequenos de células fusiformes no parênquima pulmonar, semelhantes a nódulos pulmonares de tipo meningotelial, mas com positividade imunohistoquímica para actina do músculo liso. A hipótese de desenvolvimento inicial de linfangioleiomiomatose pulmonar é discutida. Keywords: Mediastinal, Lymphangioleiomyoma, Lymphangioleiomyomatosis, Palavras‐chave: Mediastinal, Linfangioleiomioma, Linfangioleiomiomatose

INGESTA DE BEBIDAS AZUCARADAS ANALCOHOLICAS E INDICE DE MASA CORPORAL. UN ESTUDIO EN ESCOLARES CHILENOS

OpenAIRE

ARANEDA FLORES, JACQUELINE A.

2013-01-01

Introducción: En las últimas décadas, a nivel mundial, se ha observado un aumento en el consumo de bebidas azucaradas analcohólicas y paralelamente el incremento de peso corporal en niños y adolescentes, situación que ha sido asociada positivamente en diversos estudios. Hipótesis: Existe una relación directa entre el consumo de bebidas azucaradas analcohólicas y el Índice de Masa Corporal en los escolares chilenos entre los 6-18 años de edad. Así a medida que aumenta el cons...

A Prospective Multi-Institutional Cohort Study of Mediastinal Infections After Cardiac Operations.

Science.gov (United States)

Perrault, Louis P; Kirkwood, Katherine A; Chang, Helena L; Mullen, John C; Gulack, Brian C; Argenziano, Michael; Gelijns, Annetine C; Ghanta, Ravi K; Whitson, Bryan A; Williams, Deborah L; Sledz-Joyce, Nancy M; Lima, Brian; Greco, Giampaolo; Fumakia, Nishit; Rose, Eric A; Puskas, John D; Blackstone, Eugene H; Weisel, Richard D; Bowdish, Michael E

2018-02-01

Mediastinal infections are a potentially devastating complication of cardiac operations. This study analyzed the frequency, risk factors, and perioperative outcomes of mediastinal infections after cardiac operations. In 2010, 5,158 patients enrolled in a prospective study evaluating infections after cardiac operations and their effect on readmissions and mortality for up to 65 days after the procedure. Clinical and demographic characteristics, operative variables, management practices, and outcomes were compared for patients with and without mediastinal infections, defined as deep sternal wound infection, myocarditis, pericarditis, or mediastinitis. There were 43 mediastinal infections in 41 patients (cumulative incidence, 0.79%; 95% confidence interval [CI] 0.60% to 1.06%). Median time to infection was 20.0 days, with 65% of infections occurring after the index hospitalization discharge. Higher body mass index (hazard ratio [HR] 1.06; 95% CI, 1.01 to 1.10), higher creatinine (HR, 1.25; 95% CI, 1.13 to 1.38), peripheral vascular disease (HR, 2.47; 95% CI, 1.21 to 5.05), preoperative corticosteroid use (HR, 3.33; 95% CI, 1.27 to 8.76), and ventricular assist device or transplant surgery (HR, 5.81; 95% CI, 2.36 to 14.33) were associated with increased risk of mediastinal infection. Postoperative hyperglycemia (HR, 3.15; 95% CI, 1.32 to 7.51) was associated with increased risk of infection in nondiabetic patients. Additional length of stay attributable to mediastinal infection was 11.5 days (bootstrap 95% CI, 1.88 to 21.11). Readmission rates and mortality were five times higher in patients with mediastinal infection than in patients without mediastinal infection. Mediastinal infection after a cardiac operation is associated with substantial increases in length of stay, readmissions, and death. Reducing these infections remains a high priority, and improving post-operative glycemic management may reduce their risk in patients without diabetes. Copyright © 2018 The

Procesos de remoción en masa en México: hacia una propuesta de elaboración de un inventario nacional

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Irasema Alcántara Ayala

2009-10-01

Full Text Available Los procesos de remoción en masa constituyen una amenaza importante ya que éstos, en combinación con la vulnerabilidad de las poblaciones expuestas, determinan el riesgo y han causado a lo largo de la historia un considerable número de desastres en diversas partes del mundo, incluyendo México. Una adecuada evaluación de dichas amenazas requiere en su fase inicial, de la identificación y clasificación tipológica de los movimientos en su contexto espacio-temporal; esto comúnmente se realiza mediante la elaboración de diferentes tipos de mapas y de la construcción de un inventario. Sin embargo, debido a que las investigaciones relacionadas con la inestabilidad de laderas desde una perspectiva geomorfológica y no meramente ingenieríl son recientes y carecen de una plataforma sólida de referencia a nivel nacional, todavía no se ha desarrollado un inventario de procesos de remoción en masa para el territorio. En consecuencia, en este trabajo se hace una propuesta de elaboración de dicho inventario, la cual se ejemplifica a partir de su construcción, con base en observaciones de campo y análisis de imágenes de satélite IKONOS, para una porción de la Sierra Norte de Puebla, una de las zonas más afectadas por movimientos gravitacionales.

A Case of Mediastinal Extramedullary Plasmacytoma Associated with Multiple Myeloma

Energy Technology Data Exchange (ETDEWEB)

Min, Ji Hye; Kim, Tae Sung; Ko, Young Hyeh; Kim, Ki Hyun [Samsung Medical Center, Sungkyunkwan University, Seoul (Korea, Republic of)

2010-08-15

Extramedullary plasmacytoma is a rare manifestation of multiple myeloma, and involvement of the mediastinum by extramedullary plasmacytoma is very rare. We report here on a rare case of a large mediastinal extramedullary plasmacytoma and several pleural nodules with pleural effusions in a 45-year-old male patient with multiple myeloma that involved the thoracic spine and the calvarium. The mediastinal extramedullary plasmacytoma manifested on CT as an 11 x 4.5 cm-sized, relatively homogeneous, mildly enhancing, anterior mediastinal mass with several pleural nodules, and this simulated malignant lymphoma or malignant thymic epithelial tumor.

Factores clínicos relacionados con la hipertensión arterial en pacientes con trastornos de tolerancia a los carbohidratos Clinical factors related to arterial hypertension in patients with impaired carbohydrate tolerance

Directory of Open Access Journals (Sweden)

Marelys Yanes Quesada

2007-12-01

Full Text Available La hipertensión arterial constituye una de las enfermedades más frecuentes en el momento actual. Su asociación con trastornos del metabolismo de la glucosa, acelera el grado de intolerancia y de sus complicaciones. Con el objetivo de identificar algunos factores clínicos asociados a ella en pacientes con trastornos de la tolerancia a la glucosa, se realizó un estudio descriptivo, transversal, con 329 pacientes con antecedentes de una hiperglucemia previa, a los que se les realizó una prueba de tolerancia a la glucosa para medir glucemia. Se les recogieron los datos siguientes: edad, sexo, peso, talla, se calculó el índice de masa corporal y tensión arterial. Se encontró una asociación significativa de la hipertensión arterial con el incremento de la edad, el sexo masculino y un mayor índice de masa corporal. La frecuencia de hipertensión arterial fue de un 59,9 %, y se incrementó hasta un 76,2 % en los pacientes con mayor número de factores de riesgo. La hipertensión arterial tiene una elevada prevalencia en pacientes con trastornos de tolerancia a la glucosa, la edad avanzada, el sexo masculino y el índice de masa corporal elevado, que a su vez se relacionan con su incremento, y cuando los sujetos presentan varios factores de riesgo asciende la frecuencia de hipertensión arterial.Arterial hypertension is one of the most common diseases at present. Its association with glucose metabolism disorders speeds up the intolerance degree and its complications. In order to identify some clinical factors associated with it in patients with impaired glucose tolerance, a descriptive cross-sectional study was conducted among 329 patients with previous history of hyperglycemia. A glucose tolerance test was performed to measure glycemia. The following data were collected: age, sex, weight and height. The body mass index and the arterial hypertension were calculated. The arterial hypertension frequency had an elevated prevalence of patients

Risks and benefits in treatment of mediastinal abscess by endobronchial ultrasound-guided transbronchial needle aspiration.

Science.gov (United States)

Tian, Lei; Krimsky, William S; Wu, Qingchen; Sun, Jiayuan

2017-07-01

Mediastinal abscess is a fatal condition, treatment of mediastinal abscess is with antibiotics and sometimes surgery for debridement and drainage. Endobronchial ultrasound-guided transbronchial needle aspiration (EBUS-TBNA) is a safe assessment and candidate treatment method of mediastinal lesions. This study aimed to HYPERLINK "javascript:void(0);" discuss risks and benefits in treatment of mediastinal abscess by EBUS-TBNA. We noticed a 56-year-old man with developed bilateral pneumonia and sepsis after puncture of mediastinal abscess by EBUS-TBNA. The patient was successfully treated with a combination of systemic anti-infection treatment and intracavitary administration of antibiotics, antifungal and repeated drainage and lavage via EBUS-TBNA, in 1 year follow-up without recurrence. This study indicated infection spread risk of mediastinal abscess after EBUS-TBNA, and mediastinal abscess was successfully cured by combination of systemic anti-infection and local intervention through EBUS-TBNA. EBUS-TBNA is a potential effective minimally invasive treatment for mediastinal abscess, and it is necessary to be aware of clinical complications after puncture of mediastinal infectious lesions by EBUS-TBNA. © 2015 John Wiley & Sons Ltd.

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

Modelos de pérdida de masa de acero por corrosión atmosférica en Colombia usando inteligencia computacional

Directory of Open Access Journals (Sweden)

Esteban Velilla

2009-01-01

Full Text Available Con el fin de clasificar la corrosividad de las diferentes atmósferas colombianas, como parte de un proyecto de investigación extenso [1], se expusieron placas de acero al carbono en 21 estaciones distribuidas a lo largo de la infraestructura eléctrica del país (líneas de transmisión y subestaciones. En estas estaciones se midieron entre otros, el tiempo de humectación y la deposición de sulfatos y cloruros durante 12 meses; además, bimensualmente se tomaban placas de acero para medir en laboratorio la pérdida de masa sufrida por estas durante el tiempo de exposición. La clasificación de las 21 estaciones se hizo en 4 grupos, considerando: el tiempo de humectación, contenidos de cloruros y sulfatos, la altura sobre el nivel del mar y el tiempo de exposición de las placas; variables consideradas linealmente independientes según la técnica de descomposición en valores singulares (SVD realizada. El criterio utilizado para la clasificación fue el de similitud de las variables utilizando la norma Euclidiana considerada en la red neuronal no supervisada tipo Kohonen. Adicionalmente, se implementaron modelos para la pérdida de masa del acero para cada uno de los grupos usando redes neuronales (RN tipo Feed-Forward, definiéndose como entradas las variables antes mencionadas y como única salida la pérdida de masa. Complementariamente se presenta una comparación entre el modelo de RN para el grupo 1, con otros modelos obtenidos usando Algoritmos Genéticos (AG y el método Simplex.

CT diagnosis of mediastinal tuberculous lymphadenopathy in adults

International Nuclear Information System (INIS)

Liu Fugeng; Pan Jishu; Wu Guogeng; Chen Qihang; Yu Jingying; Zhou Cheng

2001-01-01

Objective: To evaluate the features of mediastinal tuberculous lymphadenopathy in adults on CT, especially on enhanced CT scan. Methods: Seventeen patients with adult mediastinal tuberculous lymphadenopathy proved by operation, biopsy, and (or) anti-tuberculous therapy were evaluated on chest film and CT scan, and 6 patients were performed with enhanced CT scan. Results: The chest film finding was intrathoracic mass and (or) hilar mass only in 6 patients, but CT detected 37 enlarged nodes in all patients. Most of the enlarged nodes were located in 2R and (or) 4R (59.4%). 30 nodes (81.1%) presented as low-density in the center of nodes, and there were marked enhancement at the periphery areas of the nodes after enhancement in all 6 patients (100.0%). Conclusion: CT scan, especially the enhanced CT scan, is the first method of choice to diagnose the mediastinal tuberculous lymphadenopathy in adults

Desarrollo de un pan de masa madre rico en GABA y péptidos IECA

OpenAIRE

Diana Pérez, Marina

2014-01-01

[spa] Existe una relación evidente entre el consumo de sal y el mayor riesgo de padecer hipertensión. La hipertensión es una enfermedad crónica que afecta a algo más del 40% de la población general adulta en España. El pan es uno de los alimentos básicos de la dieta humana siendo en España la principal fuente dietética de sodio en la población adulta. El uso de masa madre produce un pan con una notable mejora de las características nutricionales y sensoriales, incluyendo aroma, sabor, textura...

Significance of computed tomography in the diagnosis of the mediastinal mass lesions

Energy Technology Data Exchange (ETDEWEB)

Kimura, Masanori; Takashima, Tsutomu; Suzuki, Masayuki; Itoh, Hiroshi; Hirose, Jinichiro; Choto, Shuichi (Kanazawa Univ. (Japan). School of Medicine)

1983-08-01

Thirty cases of the mediastinal mass lesions were examined by computed tomography and diagnostic ability of CT was retrospectively evaluated. We devided them into two major groups: cystic and solid lesions. Cysts and cystic teratomas were differentiated on the thickness of their wall. Pericardial cysts were typically present at the cardiophrenic angle. In the solid mediastinal lesions, the presence of calcific and/or fatty components, the presence of necrosis, the irregularity of the margin and the obliteration of the surrounding fat layer were the clues to differential diagnosis and of evaluation for their invasiveness. Although differential diagnosis of the solid anterior mediastinal tumors was often difficult, teratomas with calcific and fatty componets were easily diagnosed. Invasiveness of the malignant thymoma and other malignant lesions were successfully evaluated to some extent. Neurogenic posterior mediastinal tumors were easily diagnosed because of the presence of the spine deformity and typical dumbbell shaped appearance. We stress that our diagnostic approach is useful to differentiate the mediastinal mass lesions.

Significance of computed tomography in the diagnosis of the mediastinal mass lesions

International Nuclear Information System (INIS)

Kimura, Masanori; Takashima, Tsutomu; Suzuki, Masayuki; Itoh, Hiroshi; Hirose, Jinichiro; Choto, Shuichi

1983-01-01

Thirty cases of the mediastinal mass lesions were examined by computed tomography and diagnostic ability of CT was retrospectively evaluated. We devided them into two major groups: cystic and solid lesions. Cysts and cystic teratomas were differentiated on the thickness of their wall. Pericardial cysts were typically present at the cardiophrenic angle. In the solid mediastinal lesions, the presence of calcific and/or fatty components, the presence of necrosis, the irregularity of the margin and the obliteration of the surrounding fat layer were the clues to differential diagnosis and of evaluation for their invasiveness. Although differential diagnosis of the solid anterior mediastinal tumors was often difficult, teratomas with calcific and fatty componets were easily diagnosed. Invasiveness of the malignant thymoma and other malignant lesions were successfully evaluated to some extent. Neurogenic posterior mediastinal tumors were easily diagnosed because of the presence of the spine deformity and typical dumbbell shaped appearance. We stress that our diagnostic approach is useful to differentiate the mediastinal mass lesions. (author)

Voluminous post-traumatic mediastinal haematoma: late presentation in DEA

Directory of Open Access Journals (Sweden)

Luciano Cardinale

2008-10-01

Full Text Available Mediastinal haematoma in the settings of blunt chest trauma can produce potentially serious problems. Nonaortic sources include disruption of arch vessels, rupture of small mediastinal veins, fractures of ribs/sternum and injury to the intercostal and internal thoracic vessels. Rupture of the aorta and great vessels is less frequent. Mediastinal haematoma presents a dual threat to haemodynamic stability, both as source of blood loss and because of compression of vascular structures such as the heart and pulmonary arteries. The case presented here tells about a patient who was initially in good conditions and haemodynamically stable, with no radiologic abnormalities. Some hours later he developed chest pain with hypotension due to sudden growth of large mediastinal haematoma. Multiphase multi-detector CT (MDCT in our case allowed prompt detection of active bleeding in the arterial phase, a specific sign of arterial injury, with cardiac tamponade, which required immediate surgical treatment. MDCT is commonly considered the gold standard in severe thoracic trauma. Improvements in CT scanner technology have markedly shortened scanning times and now provide cardiac and vessels images of high quality during routine chest CT examinations.

Can post-sternotomy mediastinitis be prevented by a closed incision management system?

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Dohmen, Pascal M.

2014-09-01

Full Text Available [english] Post-sternotomy mediastinitis is a serious complication after cardiothoracic surgery and contribute significantly to post-operative morbidity, mortality, and healthcare costs. Negative pressure wound therapy is today’s golden standard for post-sternotomy mediastinitis treatment. A systematic literature search was conducted at PubMed until October 2012 to analyse whether vacuum-assisted closure technique prevents mediastinitis after clean surgical incisions closure. Today’s studies showed reduction of post-sternotomy mediastinitis including a beneficial socio-economic impact. Current studies, however included only high-risk patients, hence furthermore, larger randomised controlled trials are warranted to clarify the benefit for using surgical incision vacuum management systems in the general patient population undergoing sternotomy and clarify risk factor interaction.

Pemikiran Suksesi Dalam Politik Islam Masa Pra Modern

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Mazro'atus Sa'adah

2016-12-01

Abstrak: Pemikiran politik Islam muncul setelah Islam melalui Nabi Muhammad SAW berhasil membentuk sebuah ummat baru, dari peralihan kekuasaan kerajaan/kesukuan kepada Nabi yang kemudian kepada umat. Nabi Muhammad dinilai berhasil dalam mengatur komunitas barunya yang dikendalikan oleh ajarannya dalam seluruh lini kehidupan. Persoalan muncul kemudian setelah beliau wafat, yang akhirnya memunculkan pemikiran tentang suksesi. Artikel ini akan membahas tentang mengapa terjadi suksesi setelah Nabi Muhammad SAW wafat, bagaimana pemikiran para tokoh politik Islam masa pra modern terkait dengan suksesi, dan apa kontribusi pemikiran suksesi ini terhadap politik Islam di Indonesia. Dengan menggunakan pendekatan sejarah, ditemukan bahwa Nabi Muhammad tidak menetapkan siapa yang akan menggantikannya, dan ketika beliau wafat (632 M, para sahabat memilih seorang pemimpin (imam/khalifah. Masa pemerintahan Abu Bakar, Umar dan Usman banyak terjadi perselisihan yang awalnya terkait kepentingan agama namun berkembang menjadi kepentingan politik. Ketika Ali bin Abi Talib diangkat sebagai khalifah, konflik politik berkepanjangan berkaitan dengan pembunuhan Usman, menjadikan timbulnya perang jamal antara Aisyah dan Ali. Pada masa ini perbedaan kepentingan aqidah dipolitisir lebih jauh menjadi sebuah kepentingan politik. Dinamika politik ini kemudian melahirkan mazhab politik Islam klasik yang terbagi dalam tiga mazhab besar yaitu Sunni, Syi'ah dan Khawarij, yang darinya muncul istilah-istilah khilafah, imamah, ahlul halli wal aqdi, bay’ah, walayah dan lain-lain. Dari ketiga mazhab politik ini, kemudian muncul ide pemikiran politik Islam yang sangat kompleks dan berkepanjangan dari para tokoh politik Islam pra modern yang banyak dipengaruhi oleh filosof Yunani. Di Indonesia, pemikiran suksesi dalam politik Islam masa pra modern ini pernah diwacanakan. Namun untuk pemilihan kepala Negara belum terealisasi mengingat Indonesia bukan Negara Islam.

Anterior mediastinal masses in the Framingham Heart Study: Prevalence and CT image characteristics

International Nuclear Information System (INIS)

Araki, Tetsuro; Nishino, Mizuki; Gao, Wei; Dupuis, Josée; Washko, George R.; Hunninghake, Gary M.; Murakami, Takamichi; O’Connor, George T.; Hatabu, Hiroto

2015-01-01

To investigate the prevalence and CT image characteristics of anterior mediastinal masses in a population-based cohort and their association with the demographics of the participants. Chest CT scans of 2571 Framingham Heart Study participants (mean age 58.9 years, 51% female) were evaluated by two board-certified radiologists with expertise in thoracic imaging for the presence of anterior mediastinal masses, their shape, contour, location, invasion of adjacent structures, fat content, and calcification. For participants with anterior mediastinal masses, a previous cardiac CT scan was reviewed for interval size change of the masses, when available. The demographics of the participants were studied for any association with the presence of anterior mediastinal masses. Of 2571, 23 participants (0.9%, 95% CI: 0.6–1.3) had anterior mediastinal masses on CT. The most common CT characteristics were oval shape, lobular contour, and midline location, showing soft tissue density (median 32.1 HU). Fat content was detected in a few cases (9%, 2/23). Six out of eight masses with available prior cardiac CT scans demonstrated an interval growth over a median period of 6.5 years. No risk factors for anterior mediastinal masses were detected among participants’ demographics, including age, sex, BMI, and cigarette smoking. The prevalence of anterior mediastinal masses is 0.9% in the Framingham Heart Study. Those masses may increase in size when observed over 5–7 years. Investigation of clinical significance in incidentally found anterior mediastinal masses with a longer period of follow-up would be necessary

Cambios microestructurales y reológicos de masas y panes sin gluten

OpenAIRE

Rivera Flores, José Octavio

2015-01-01

El estudio de la microestructura de las masas y panes sin gluten nos permite predecir el comportamiento de estos durante los procesos de elaboración y por ende la maquinabilidad de los mismos. Se hizo un análisis reológico de masas sin gluten y un análisis de perfil de textura (TPA) a los panes elaborados a partir de estas, también se tomaron imágenes por medio del microscopio electrónico de barrido, tanto de las masas como de los panes. Para hacer el perfil reológico se hicieron ensayos osci...

Esophageal Gastrointestinal Stromal Tumors Presenting as Mediastinal Mass

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M. Kafeel

2013-11-01

Full Text Available Gastrointestinal stromal tumors (GISTs are the most common mesenchymal tumors of the gastrointestinal tract and are predominant in the stomach and intestine but rare in the esophagus. Here, we report a case of esophageal GIST which presented as a mediastinal mass on chest X-ray and dyspnea. The case was initially diagnosed as leiomyosarcoma, which could create a diagnostic dilemma. Therefore, recognizing this uncommon presentation as a mediastinal mass with esophageal GIST is important in the differential diagnosis.

Fibrosing Mediastinitis: Successful Stenting of the Pulmonary Artery

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Rennae Thiessen

2008-01-01

Full Text Available Fibrosing mediastinitis is a rare benign condition, which can cause compression of the pulmonary or systemic vessels, tracheobronchial tree, coronary arteries or esophagus, leading to disabling clinical symptoms and even death. The case of a 26-year-old woman who presented with dyspnea is described. She was found to have 80% stenosis of the right pulmonary artery secondary to fibrosing mediastinitis. The stenosis was managed successfully with an endovascular Palmaz-Schatz stent, and the patient remains symptom-free 10 years later.

Ilhaq al-Masa'il bi Nazairiha dan Penerapannya dalam Bahth al-Masa'il

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Luthfi Hadi Aminuddin

2013-11-01

Full Text Available Abstract: Ilh}a>q al-Masa>’il bi Naz}a>iriha is one of the methods used by Nahdlatul Ulama in resisting the opinion based on (manhaji analytical concept of Islamic jurisprudence (the solution for complex social problems as the main purpose of Islamic shari’ah. As known that, up to now, ilh}a>q has been understood as a process of answering a new case by the way of equating to the old one which is written in the book called al-mu’tabarah. Such ilh}a>q has got many criticisms both from the definitions, procedures and its epistemogical footing. This paper is about to reveal how the NU clerics of Islam understand the concept of Ilh}a>q}, what its epistemological footing was and how the concept was applied in discussing many cases (bah}th al-masa>’il. Based on the writer’s study to several documents of decision results of NU that Ilh}a>q did not only simplify to equate the new cases with the old ones that have been freely discussed in the books of al-mu’tabarah, but both cases should have similar legal substance, that is, both should be under the decrees of laws of al-qawa> ‘id al-fiqhi>yah. Thus, Ilh}a>q is actually answering the problem by applying al-qawa>‘id al-fiqhi>yah, whereas the formulation al-qawa>‘id al-fiqhi>yah itself was set off from the examination of a number of furu>’ generated by qiya> s. This paper also found three variations of the implementation of Ilh}a>q in bah}th al-masa>’il. First, the application of Ilh}a>q was without mentioning al-qawa> ‘id al-fiqhi>yah which covered new cases (mulh}aq and the old case law that has been known in the books of fiqh (mulh}aq bih/attached to. Second, the application of Ilh}a>q was accompanied by mentioning mulh}aq bih and al-qawa> ‘id al-fiqhi>yah. Third, the application of Ilh}a>q, was only by the mentioning al-qawa> ‘id al-fiqhi>yah.

El estado del peso corporal en sujetos con retraso mental en un centro de día

OpenAIRE

García, Edi Guillermo

2010-01-01

La investigación del peso corporal en sujetos con retraso mental (RM) ha sido emparentada con la obesidad y, en menor medida, con el bajo peso. Con el motivo de determinar el estado del peso corporal y establecer si existen desviaciones respecto al peso normal, es que se realizó un estudio con diseño descriptivo transversal teniendo en cuenta las diferentes de evaluación el Índice de Masa Corporal y el IMC para la edad, recolectándose los datos en concurrentes a un Centro de Día. Según ...

BIBLIOGRAFI SEJARAH KESEHATAN PADA MASA PEMERINTAHAN HINDIA BELANDA

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Mumuh Muhsin Z.

2012-07-01

Full Text Available History of health recently began to receive attention in Indonesia. One of the ways to trace them is through bibliographic study. Publications issued in the past, particularly in the colonial period, whether it be books, journals, magazines, newspapers can become an access to know and reconstruct the history of health in Nusantara. The purpose of this study is to inventory and identify a number of publications that appeared in the past by first described its historical context. The method used in this study is the historical method. The conclusion showed that the availability of bibliographic resources on the history of health in Indonesia is quite a lot that can be used to reconstruct the Indonesian health conditions in the colonial period. Knowledge of medical history is very useful to see the change, continuity, parallelism, and comparison of health problems in various places and at different periods. Key words: bibliography, medical history, the Netherlands-Indie   Sejarah kesehatan belakangan ini mulai mendapat perhatian di Indonesia. Untuk menelusurinya di antaranya adalah melalui pengkajian bibliografis. Publikasi-publikasi yang diterbitkan pada masa lalu, khususnya masa kolonial,  baik berupa buku, jurnal, majalah, surat kabar bisa menjadi akses untuk mengetahui dan merekonstruksi masa lalu kesehatan di Nusantara. Tujuan penelitian ini adalah menginventarisasi dan mengidentifikasi sejumlah publikasi yang terbit pada lalu dengan terlebih dahulu diuraikan konteks sejarahnya. Metode yang digunakan dalam penelitian ini adalah metode sejarah. Simpulannya adalah ketersediaan sumber bibliografis mengenai sejarah kesehatan di Indonesia yang cukup banyak itu dapat digunakan untuk merekonstruksi kondisi kesehatan di Indonesia masa kolonial. Pengetahuan sejarah kesehatan ini sangat berguna untuk melihat perubahan, kesinambungan, paralelisme, dan perbandingan masalah kesehatan di berbagai tempat pada berbagai periode. Kata kunci: bibliografi

Mediastinal lymphoscintigraphy after intraperitoneal injection of 99mTc-HSA-D

International Nuclear Information System (INIS)

Kawahara, Hidejirou; Hirai, Katsuya; Aoki, Teruaki; Takayama, Sumio; Mori, Yutaka

1998-01-01

An intraperitoneal injection tube was inserted into the abdominal cavity (right subphrenic lesion 3, left subphrenic lesion 3, Douglas pouch 3) in patients with recurrent gastric cancer and those receiving non curative resection. 99m Tc-HSA-D, 1 ml (740 MBq) was administered through the tube. After the injection, lymph flow dynamics was observed with a scinticamera. In the subphrenic injection group, there was no significant difference in the mediastinal lymphography between right and left subphrenic injection. In that group, mediastinal lymphography had been observed promptly after the administration. However, in the Douglas injection group, until 99m Tc-HSA-D reached the diaphragm no mediastinal lymphography was observed. The HSA-D count in the peripheral blood increased in the Douglas injection group but it remained low in the subphrenic injection group. Therefore it is conceivable that the main pathway was the diaphragm lymphatic system between the intraabdominal lymphatic system and the mediastinal lymphatic system. And intraperitoneal administration of the anticancer agent may not only have a sufficiently effect on the intraabdominal lymphatic system but also on the mediastinal lymphatic system. Especially subphrenic injection is very useful because concentration of the agent in peripheral blood may be held at a low level. (author)

Influencia de la masa corporal y de la distribución grasa sobre la fuerza muscular de una cohorte de población anciana: Diferencias por sexo

OpenAIRE

Castillo Gallego, Carmen

2015-01-01

Tesis doctoral inédita leída en la Universidad Autónoma de Madrid, Facultad de Medicina, Departamento de Medicina. Fecha de lectura 18-09-2015 Objetivo: La grasa visceral tiene una alta actividad metabólica con efectos deletéreos para la salud. Entre los efectos adversos contra la salud está el aumento del riesgo de fragilidad. Una parte importante de la fragilidad en el anciano es la sarcopenia o pérdida de masa y de fuerza muscular que se produce con la edad. En esta tesis do...

Taxonomía de levaduras de origen enológico por espectrometría de masas

OpenAIRE

Gutiérrez López, Cristina

2016-01-01

Esencialmente, la tesis presentada bajo el título “Taxonomía de levaduras de origen enológico por espectrometría de masas” trata sobre la implementación del proceso de identificación y clasificación taxonómica de levaduras de interés enológico mediante el empleo de la técnica MALDI-TOF MS, como alternativa a la utilización de técnicas clásicas y moleculares. Se ha creado una librería de espectros de masas mediante MALDI-TOF MS con una extensa colección de levaduras aisladas del entorno enológ...

Anterior mediastinal paraganglioma: A case for preoperative embolization

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Shakir Murtaza

2012-07-01

Full Text Available Abstract Background Paraganglioma is a rare but highly vascular tumor of the anterior mediastinum. Surgical resection is a challenge owing to the close proximity to vital structures including the heart, trachea and great vessels. Preoperative embolization has been reported once to facilitate surgical treatment. Case presentation We report a case of anterior mediastinal paraganglioma that was embolized preoperatively, and was resected without the need for cardiopulmonary bypass and without major bleeding complications. Conclusion We make a case to further the role of preoperative embolization in the treatment of mediastinal paragangliomas.

Imaging features of posterior mediastinal chordoma in a child

Energy Technology Data Exchange (ETDEWEB)

Soudack, Michalle; Guralnik, Ludmilla; Engel, Ahuva [Rambam Health Care Campus, Department of Diagnostic Imaging, Haifa (Israel); Ben-Nun, Alon [Rambam Health Care Campus, Department of Thoracic Surgery, Haifa (Israel); Berkowitz, Drora [Rambam Health Care Campus, Department of Pediatrics B, Haifa (Israel); Postovsky, Sergey [Rambam Health Care Campus, Department of Pediatric Hemato-Oncology, Haifa (Israel); Vlodavsky, Eugene [Rambam Health Care Campus, Department of Pathology, Haifa (Israel)

2007-05-15

A 51/2-year-old boy presented with repeated episodes of stridor and cough. Chest radiography demonstrated a widened mediastinum. Evaluation by CT revealed a low-density posterior mediastinal mass initially diagnosed as benign tumor. Histopathological analysis of the resected mass disclosed a malignant chordoma. Our radiological results are described with an analysis of the imaging findings in the medical literature. We present our suggestions for preoperative evaluation of posterior mediastinal tumors. (orig.)

Comparación de los efectos de las intervenciones basadas en el aumento de la actividad física autónoma frente a las basadas en ejercicio aérobico en variables relacionadas con la salud en personas sedentarias y con sobrepeso-obesidad

OpenAIRE

Gallego Sánchez Noriega, Jesús

2015-01-01

Esta revisión persigue identificar las mejoras sobre variables relacionadas con la salud, producidas por intervenciones de actividad física autónoma y la reducción del sedentarismo, en comparación con las mejoras producidas por intervenciones de ejercicio aérobico en personas sedentarias y con sobrepeso/obesidad. Se incluyeron finalmente 17 estudios con diseño Randomized Controlled Trial (RCT), con sujetos de ≥ 18 años y con un Índice de Masa Corporal (IMC) ≥ 25. Los resultados ...

Consideraciones sobre el diagnóstico por imágenes de las masas selares Reflection on imaging diagnosis of sellar masses

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José Arturo Hernández Yero

2005-12-01

Full Text Available Con el propósito de hacer un llamado de atención sobre una temática de importancia y tomando en consideración que con los avances en la imagenología moderna se aportan elementos distintivos y de gran utilidad en el diagnóstico por imágenes de un grupo de masas en la región de la silla turca, se hacen determinadas valoraciones al respecto, con precisión de algunas de las características de las principales masas selares y su apariencia en la resonancia magnética nuclear. Se destacan detalles en cuanto a la intensidad de la señal en los adenomas pituitarios, craneofaringiomas, quistes de la bolsa de Rathke, hiperplasia hipofisaria y el denominado síndrome de la silla turca vacía, entre otras causas de cambios anatómicos en la región selar. Se concluye que la imagen por resonancia magnética nuclear sería el método idóneo para un mejor diagnóstico de las masas selares aunque, en ausencia de esta, la tomografía contrastada puede resultar de utilidad si se realiza con cortes menores de 2 mm. Se resalta la importancia de integrar un equipo multidisciplinario entre clínicos, endocrinólogos, imagenólogos, neurocirujanos y anatomopatólogos, para obtener diagnósticos más precisos y resultados terapéuticos adecuados.Some reflections were made on imaging diagnosis of sellar masses, specifying some characteristics of the main sellar masses and their appearance in magnetic resonance imaging. The purpose was to call the attention on this important issue on the basis that modern imaging advances offer very useful distinctive elements in the diagnosis of a group of masses located in the sella turcica region. The paper underlined details of signal intensity in pituitary adenomas, craniopharyngiomas, Rathke´s pouch cysts, hypophysial hyperplasia and the so-called empty sella syndrome, among other causes of anatomical changes in sellar region. It was concluded that magnetic resonance imaging would be the ideal method for a better

Asociación entre hábitos alimentarios e índice de masa corporal normal en soldados chilenos

OpenAIRE

Durán-Agüero, Samuel; Maraboli Ulloa, Daniela; Cubillos-Schmied, Gonzalo; Fernández-Frías, Francisco

2016-01-01

Introducción: Se han evaluado los hábitos alimentarios de diversos grupos etarios y oficios, sin embargo, hay poca información de hábitos alimentarios en soldados. El objetivo del presente estudio es asociar hábitos alimentarios con el índice de masa corporal (IMC) normal en soldados chilenos del Regimiento Buín, Chile. Material y Métodos: Se evaluó a 412 soldados, a cada uno se le aplicó una encuesta alimentaria y una evaluación antropométrica para determinar IMC. Se consideró IMC normal cua...

Modelización lineal de un sistema masa-resorte real

OpenAIRE

Matar, Maricel; Parodi, Miguel A.; Repetto, Carlos E.; Roatta, Analía

2017-01-01

De acuerdo al modelo enseñado en los cursos introductorios universitarios, la frecuencia de las oscilaciones libres de un sistema masa-resorte vertical, en el caso de fuerzas disipativas y masa del resorte despreciables, puede calcularse simplemente como la raíz cuadrada de la relación entre la gravedad del lugar y el estiramiento producido por el cuerpo sujeto al resorte. Sin embargo, cuando se utiliza un resorte real, las frecuencias medidas difieren en forma notable por debajo de las previ...

Body mass variation in the Geoffroy's cat (Oncifelis geoffroyi Variaciones de la masa corporal del gato montés (Oncifelis geoffroyi

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MAURO LUCHERINI

2006-06-01

Full Text Available We report new data on the intersexual and geographical variation in body mass of the Geoffroy's cat (Oncifelis geoffroyi d'Orbigny and Gervais 1844, a little known small cat from South America, and combine them with the existing information to compare alternative hypotheses for variation in body mass. Most data on the body mass of O. geoffroyi have been obtained from previous research on this felid in four study areas of southern Brazil and central and southern Argentina. These data were added to those reported for other three additional locations. Our results set the body mass of O. geoffroyi to 4.26 ± 1.03 kg (mean ± SD, n = 56. We also show that males generally are heavier than females throughout most of this species' distributional range. Body mass dimorphism is 1.34 on average, but ranges from 1.19 and 1.21 in Uruguay and southern Chile, respectively, to 1.76 in the northern Pampas of Argentina. When data from the best sampled areas are considered (Torres del Paine, Lihué Calel, southern Pampas, Campos del Tuyú and southern Brazil, only male body mass varies with geographic location. More intriguingly, no correlation was found between body mass and latitude. Our results suggest a smaller mean weight of O. geoffroyi relative to what was previously published, but also suggest a wider variation. Our analysis do not support Bergmann's rule, according to which the largest individuals would occur in the southernmost regions of this cat's geographic distribution, while they seem supportive of a sexually-selected process affecting sexual size dimorphism in the Geoffroy's catSe reportan nuevos datos sobre la variación intersexual y geográfica de la masa corporal en el gato montés (Oncifelis geoffroyi d'Orbigny and Gervais 1844, un félido pequeño y poco conocido de América del Sur, y los combinamos con la información existente para evaluar dos hipótesis que explicarían esta variación. La mayor parte de los datos sobre masa corporal de O

MODELADO DE DINÁMICA DE FLUIDOS Y TRANSFERENCIA DE CALOR Y MASA EN PROCESOS AGROALIMENTARIOS POR MÉTODO DE VOLÚMENES FINITOS

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NELSON O. MORAGA

2011-01-01

Full Text Available Se describe la transferencia de momento, calor y masa transitorio bi-dimensional en procesos agroalimentarios. Estos procesos son: la pre-cosecha y la deshidratación por aire caliente de frutas. La metodología incluye modelación matemática y simulación computacional para describir la convección y difusión de calor y masa conjugada que resulta de la interacción entre el alimento y el aire. El modelo matemático emplea las ecuaciones diferenciales parciales no lineales acopladas de continuidad, momento lineal, energía y materia. Se considera que las propiedades físicas de las frutas calculadas mediante correlaciones empíricas, varían con la temperatura y la concentración de humedad. El método de volúmenes finitos junto el algoritmo SIMPLE se utiliza para obtener los resultados de la variación en el tiempo de las distribuciones de velocidades (v, temperaturas (T y concentraciones de humedad (C para los procesos en estudio. Las propiedades termofísicas variables de los alimentos se obtuvieron a partir de modelos empíricos. Los resultados obtenidos incluyen distribuciones de las variables dependientes (v, T, C en el tiempo, los cuales se comparan con resultados experimentales y numéricos de la literatura especializada.

The Music Attentiveness Screening Assessment, Revised (MASA-R): A Study of Technical Adequacy.

Science.gov (United States)

Waldon, Eric G; Lesser, Alexander; Weeden, Lydia; Messick, Emily

2016-01-01

Evidence suggests that attention is an important consideration when designing procedural support interventions for children undergoing distressing medical procedures. As such, the extent to which children can attend to musical stimuli used during music-based procedural support interventions would seem important. The Music Attentiveness Screening Assessment (MASA) was designed to assess a child's ability to attend to musical stimuli, but further revisions were deemed necessary to improve administration, test-retest reliability, and interobserver agreement for the measure's items. This study investigated the technical adequacy of the Music Attentiveness Screening Assessment, Revised (MASA-R), with a non-clinical sample of children aged 4 to 9 years by examining (a) Construct validity using comparator instruments measuring auditory attention; (b) Test-retest reliability following a two-week delay; and (c) Interobserver agreement when administered by two independent examiners. This non-clinical sample included 69 children who were administered both items from MASA-R and two comparator instruments: the Auditory Attention subtest from the NEPSY-II (NII-AA) for children aged 5 to 9 years (n = 47); and the Auditory Attention subtest from the Woodcock-Johnson Tests of Cognitive Abilities, 3rd ed. (WJIII-AA), for children aged 4 years (n = 22). A significant proportion of score variance was shared by both MASA-R items and the comparator measures: R (2) = .16, F(2, 66) = 6.30, p = .003. MASA-R score estimates with regard to test-retest reliability (Item I, intra-class correlation [ICC] = .88; Item II, ICC = .91) and interobserver agreement (Item I, ICC = .99; Item II, ICC = .98) also fell into acceptable ranges. Estimates of MASA-R score construct validity, test-retest reliability, and interobserver agreement appear improved over its predecessor, MASA. While findings are promising, additional investigation of its use with a clinical sample is needed before it can be

Ocio y deporte en el nacimiento de la sociedad de masas. La socialización del deporte como práctica y espectáculo en la España del primer tercio del siglo XX

OpenAIRE

Otero Carvajal, Luis Enrique

2003-01-01

En el primer tercio del siglo XX la sociedad de masas irrumpió con fuerza en el escenario de los países desarrollados. España no permaneció al margen de las convulsiones que sacudieron a Europa en el nacimiento de la sociedad de masas. La mayor disponibilidad de tiempo libre encontró un nuevo espacio en el deporte. En este complejo entramado, la práctica y la afición por el deporte fue difundiéndose a través de la escala social española, desde las restringidas elites de principios de siglo a ...

Monitorización ambulatoria de la presión arterial en niños con obesidad

OpenAIRE

García-Vao Bel, Carlos María

2015-01-01

Tesis Doctoral leída en la Universidad Rey Juan Carlos de Madrid en 2015. Directores de la Tesis: Ángel Gil de Miguel y María José Rivero Martín Se define la obesidad como un exceso de masa grasa con relación a la masa corporal total, esta acumulación de grasa es excesiva y generalizada tanto en el tejido subcutáneo como en el resto de los tejidos y se asocia a un desequilibrio en las proporciones de los componentes magro o muscular, óseo, visceral y adiposo. Por tanto no se pu...

Magnetic resonance imaging findings of a nonfunctional mediastinal paraganglioma with an unusual presentation

International Nuclear Information System (INIS)

Sahin-Akyar, G.; Erden, I.; Yagci, C.; Akyar, S.; Erekul, S.

1997-01-01

A case of histologically proven mediastinal paraganglioma presenting with metastatic spread to supraclavicular lymph nodes is presented. Mediastinal paragangliomas are extremely rare tumors and their CT and MR imaging features have not been well documented in the radiologic literature. The T 1-weighted and T 2-weighted spin-echo MR findings of a locally invasive mediastinal paraganglioma with metastasis to the supraclavicular lymph nodes are described and the literature is briefly reviewed. (orig.). With 4 figs

ENVEJECIMIENTO, MASA MUSCULAR Y ENTRENAMIENTO DE LA FUERZA: UNA REVISIÓN

Directory of Open Access Journals (Sweden)

Santiago Adolfo Arboleda Franco

2014-11-01

Full Text Available En este artículo se revisan los fundamentos sobre los cuales se ha reconocido la fuerza como elemento esencial en las prescripciones de ejercicio físico para la salud, específicamente en las personas mayores. Se describen las implicaciones de la sarcopenia como síndrome propio de este periodo vital y los hallazgos sobre la importancia de la masa muscular en el equilibrio homeostático mediante su función endocrina. También se examina lo propuesto desde consensos y declaraciones de asociaciones científicas sobre el entrenamiento de distintas manifestaciones de la fuerza en un contexto de salud y se revisa lo hallado en algunos meta–análisis y revisiones sistemáticas recientes sobre los efectos de este entrenamiento en distintas variables relacionadas con la capacidad funcional. Por último, se señalan algunos horizontes de investigación en el tema.

Imagen corporal, funcionamiento sexual y autoestima en mujeres brasileñas con un Índice de Masa Corporal (IMC) elevado

OpenAIRE

Santos Silva, Ajurymar; Universitat Autònoma de Barcelona. Departament de Psicologia Clínica i de la Salut

2015-01-01

En la sociedad brasileña, el `culto al cuerpo` es una práctica común y diseminada entre las mujeres. El objetivo general de la investigación es analizar si las puntuaciones del Índice de Masa Corporal (IMC), de mujeres brasileñas, interfieren en los niveles de satisfacción corporal (imagen corporal), funcionamiento sexual y autoestima. El diseño fue cuantitativo, y se han empleado cuatro instrumentos distintos, en una muestra de 102 mujeres brasileñas. Los cuestionarios utilizados fueron: un ...

Progress and problems of diagnostic imaging, (1). Computed tomography of mediastinal tumor

Energy Technology Data Exchange (ETDEWEB)

Narimatsu, A.; Hachiya, J. (Tokyo Women' s Medical Coll. (Japan))

1982-02-01

The advantages and problems of CT in the diagnosis of mediastinal lesions were described. CT is very effective for the diagnosis of these lesions. It is sensitive in visualization of the mediastinal lymph nodes which are difficult to detect by roentgenography. It is also most suitable for the screening of myasthenia gravis. CT values of tumors permit the qualitative diagnosis of lipoma and mediastinal lipoidosis to some extent. However, histological diagnoses cannot be made on the basis of the difference in the CT values of the soft tissue, nor is differentiation between benign and malignant tumors possible.

Posterior Mediastinal Tumors: Outcome of Surgery

International Nuclear Information System (INIS)

Abd Rahman, A.M.; Sedera, M.A.; Mourad, I.A.; Aziz, S.A.; Saber, T.K.H.; Al Sakary, M.A.

2005-01-01

The incidence of posterior mediastinal tumors relative to all tumors of the mediastinum is 23% to 30%. The posterior mediastinum is a potential space along each side of the vertebral column and adjacent proximal portion of the ribs. Primary tumors of posterior mediastinum are usually neurogenic. The aim of this study was to evaluate different surgical approaches used for the resection of posterior mediastinal tumors, and to assess morbidity, mortality and patients survival. Patients and Methods: Between January 200 I and January 2004, 30 patients with posterior mediastinal tumors were included. CT scan of the chest and CT guided biopsy were done for all patients; whereas MRI was done for suspected intraspinal extension. Posterolateral thoracotomy was the approach used in most of the patients. The Akwari approach was used in most of the patients with Dumbbell tumors. Neurogenic tumors constituted 67% of cases, being neuroblastoma in 60%. The non neurogenic tumors included a heterogenous group of rare tumors (n=10). Dumbbell tumors were found in 10 patients. Neuroblastoma was the commonest tumor to cause intraspinal extension (40%). Wide local excision was done in 13 patients; whereas extended resection was done in the remaining 17 patients. The mean intra-operative blood loss was 800cc and the mean hospital stay was 12 days. The size of the resected tumor ranged from 3X4cm to 30X22cm, 80% of tumors were malignant. Morbidity in relation to the procedures developed in 8 patients (atelectasis, meningitis, paraplegia, Horner syndrome and mild wound sepsis in 4, I, I, 1 and I of the patients; respectively). One postoperative mortality, due to meningitis was recorded. The overall survival by the end of three years was 87.7% with a mean survival of 30.4 months. The overall disease free survival was 55.9% with a mean disease free survival of 26.2 months. Posterior mediastinal tumors may reach large size before becoming symptomatic. Complete surgical excision (including

Factores de riesgo ateroscleróticos en pacientes con artritis reumatoide

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Arelys de Armas Hernández

2017-10-01

Full Text Available Introducción: la artritis reumatoide es una enfermedad inflamatoria crónica y progresiva caracterizada por la inflamación de articulaciones sinoviales y manifestaciones sistémicas. Objetivo: describir las características de algunos factores de riesgo de ateroesclerosis en pacientes con artritis reumatoide. Métodos: se realizó un estudio descriptivo, de corte transversal, en 112 pacientes con diagnóstico de artritis reumatoide. Para el diagnóstico positivo se tuvieron en cuenta los criterios del American College of Rheumatology. Se aplicó un cuestionario creado para la investigación y se realizaron exámenes complementarios y determinación de medidas antropométricas para explorar la presencia de factores de riesgo de ateroesclerosis. Resultados: promedio de edad de 56,3 años, con predominio del grupo menor de 49 años, sexo femenino (81,3 %; el 76,3 % de los pacientes presentaron factores de riesgo aterosclerótico con predominio para el hábito de fumar (41,1 %, hipertensión arterial (24,1 % y elevación del índice de masa corporal (18,8 %. Conclusiones: existe alta incidencia de factores de riesgo aterosclerótico en los pacientes con artritis reumatoidea, siendo los de mayor incidencia, el hábito de fumar, la hipertensión arterial y la elevación del índice de masa corporal; el metotrexato y los esteroides, son los medicamentos que más se utilizan en el control de la artritis reumatoidea y al parecer, en las dosis usualmente utilizadas, tienen un papel protector sobre el endotelio vascular.

Giant Leiomyoma Arising from the Mediastinal Pleura: A Case Report.

Science.gov (United States)

Haratake, Naoki; Shoji, Fumihiro; Kozuma, Yuka; Okamoto, Tatsuro; Maehara, Yoshihiko

2017-06-20

This report presents a rare case involving a patient with a giant leiomyoma originating from the mediastinal pleura. The patient underwent a medical examination, and chest radiography revealed a giant tumor. Computed tomography (CT) and magnetic resonance imaging (MRI) showed a well demarcated, heterogeneous mass which seemed to originate from the posterior mediastinum. Positron emission tomography (PET) showed the uptake of this tumor with a standardized uptake value of 4.9. We suspected that this tumor was a solitary fibrous tumor, and the patient underwent a surgical resection. Intraoperative exploration revealed a well-encapsulated tumor measuring 15 × 11 cm that appeared to originate from the mediastinal pleura. Immunohistochemical findings revealed a benign leiomyoma. We finally diagnosed the patient with a mediastinal leiomyoma. The present report describes CT, MRI, and PET findings of leiomyoma, and presents a review of relevant literature.

Pentalogy of Cantrell: Complete expression with mediastinal teratoma

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Michał Błaszczyński

2015-08-01

Full Text Available Pentalogy of Cantrell (POC is a rare, and often fatal congenital disorder that is characterized by a pentad consisting of ectopia cordis, omphalocele, sternal cleft, congenital diaphragmatic hernia, and various intra-cardiac defects. Although the hallmark of POC consists of these five anomalies, only a handful of cases have been reported with the full spectrum of this disorder. This case report presents a full term female with complete expression of POC and a mediastinal teratoma. Two days after birth, this infant underwent correction of the omphalocele and diaphragmatic defect, with repositioning of the cardiac apex within the thoracic cavity. Three months later surgical correction of the intra-cardiac defects took place. At initiation of cardiac by-pass a mediastinal mass at the superior cavopulmonary junction was identified and excised. This mass on histopathology was a teratoma, which makes this case unique as the occurrence of POC and mediastinal teratoma is unreported. This infant has survived the series of corrective surgeries, and is now functioning well. Conclusion: when POC is suspected further investigation for associated anomalies is required for a planned multidisciplinary surgical approach combined with neonatal intensive care to afford the opportunity for a successful outcome.

Body mass and body weight: a dual reference system in biology Masa y peso corporales: un sistema dual de referencia en biología

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BRUNO GÜNTHER

2003-03-01

Full Text Available ABSTRACT The aim of the present study was to compare two different biological similarity criteria, one was based on body mass (M as a theoretical reference system in accordance with the MLT-system of physics, while the other utilized the body weight (W for the same purpose. The mass-dependent allometry should be applied during space flights as well as during fetal and newborn conditions of life, whereas the weight-dependence should prevail in earth-bound physiology. The above mentioned distinctions are relevant not only for the specific metabolic rates but also for numerous biological time functions, as for instance for the heart and respiratory rates of all mammals, whose allometric exponent is b = - 0.09 during fetal life, and b = - 0.25 in all adult specimens.El objetivo del presente trabajo fue la comparación de dos diferentes criterios de similitud, uno basado en la masa corporal (M como sistema teórico de referencia de acuerdo con el sistema MLT de la Física, en tanto que el otro utilizó el peso corporal (W con este mismo propósito. La alometría dependiente de la masa debería aplicarse durante los vuelos espaciales así como durante la vida fetal y la condición de recién nacido, en tanto que la dependencia del peso debe prevalecer en la fisiología terrestre. La distinción antes mencionada es relevante, no sólo para el metabolismo específico y también para numerosas funciones biológicas en relación con funciones de tiempo, como ser con las frecuencias cardiaca y respiratoria de todos los mamíferos cuyo exponente alométrico es b = - 0,09 durante la vida fetal, y b = - 0,25 en todos los especimenes adultos.

Spontaneous d-ainage of a pancreatic mediastinal pseudocyst into the pleural space

International Nuclear Information System (INIS)

Hulsmans, F.J.; Jager, G.J.; Lamers, J.J.H.

1989-01-01

Mediastinal extension of an extrapancreatic pseudocyst is a rare complication of acute or chronic pancreatitis. Usually it is a serious condition which nearly always demands surgical intervention. A case is presented in which such a mediastinal pseudocyst drained spontaneously into the pleural space. (Author). 12 refs.; 5 figs

A three-dimensional mediastinal model created with rapid prototyping in a patient with ectopic thymoma.

Science.gov (United States)

Akiba, Tadashi; Nakada, Takeo; Inagaki, Takuya

2015-01-01

Preoperative three-dimensional (3D) imaging of a mediastinal tumor using two-dimensional (2D) axial computed tomography is sometimes difficult, and an unexpected appearance of the tumor may be encountered during surgery. In order to evaluate the preoperative feasibility of a 3D mediastinal model that used the rapid prototyping technique, we created a model and report its results. The 2D image showed some of the relationship between the tumor and the pericardium, but the 3D mediastinal model that was created using the rapid prototyping technique showed the 3D lesion in the outer side of the extrapericardium. The patient underwent a thoracoscopic resection of the tumor, and the pathological examination showed a rare middle mediastinal ectopic thymoma. We believe that the construction of mediastinal models is useful for thoracoscopic surgery and other complicated surgeries of the chest diseases.

Mediastinal lymph node enlargement in patients with valvular heart disease: CT evaluation and clinical correlation

International Nuclear Information System (INIS)

Park, Hye Ju; Jung, Jung Im; Ahn, Myeong Im; Han, Dae Hee; Park, Seog Hee

2016-01-01

To evaluate the presence, size and location of enlarged mediastinal lymph nodes (LNs) in patients with valvular heart disease (VHD) using computed tomography scans in correlation with ejection fraction (EF). We retrospectively evaluated 30 patients with VHD, without pre-existing diseases that could cause lymphadenopathy (LAP). The presence, size, and location of LNs greater than 1 cm in short axis diameter were evaluated. The location of mediastinal LNs was recorded according to the International Association for the Study of Lung Cancer. Furthermore, we evaluated the presence of pulmonary edema, pleural effusion, and other thoracic abnormalities and evaluated EF of the heart on transthoracic echocardiography. Sixteen patients (53%) had at least 1 enlarged mediastinal LN. The most frequent locations were lower paratracheal (4R, n = 8/4L, n = 6), subcarinal (7, n = 5) and right upper paratracheal (2R, n = 4) regions. The frequency of mediastinal LAP was higher in patients with aortic regurgitation (2 of 2, 100%) followed by mitral regurgitation (8 of 11, 73%); it was also high in patients with pulmonary edema (80%), pleural effusion (81%), or both (77%), as compared to patients without pulmonary edema or pleural effusion (17%) (p = 0.001). Ten of 30 patients showed an abnormal EF of < 55%; among them, 8 had mediastinal LAP. However, the relationship between EF and LAP was not statistically significant (p = 0.058). Mediastinal LN enlargement is common in patients with VHD, especially in cases of pulmonary edema and pleural effusion. Enlarged mediastinal LNs were frequently observed with abnormal EF, however, the relationship between EF and mediastinal LAP was not statistically significant.

Mediastinal lymph node enlargement in patients with valvular heart disease: CT evaluation and clinical correlation

Energy Technology Data Exchange (ETDEWEB)

Park, Hye Ju; Jung, Jung Im; Ahn, Myeong Im; Han, Dae Hee; Park, Seog Hee [Dept. of Radiology, Seoul St. Mary' s Hospital, College of Medicine, The Catholic University of Korea, Seoul (Korea, Republic of)

2016-04-15

To evaluate the presence, size and location of enlarged mediastinal lymph nodes (LNs) in patients with valvular heart disease (VHD) using computed tomography scans in correlation with ejection fraction (EF). We retrospectively evaluated 30 patients with VHD, without pre-existing diseases that could cause lymphadenopathy (LAP). The presence, size, and location of LNs greater than 1 cm in short axis diameter were evaluated. The location of mediastinal LNs was recorded according to the International Association for the Study of Lung Cancer. Furthermore, we evaluated the presence of pulmonary edema, pleural effusion, and other thoracic abnormalities and evaluated EF of the heart on transthoracic echocardiography. Sixteen patients (53%) had at least 1 enlarged mediastinal LN. The most frequent locations were lower paratracheal (4R, n = 8/4L, n = 6), subcarinal (7, n = 5) and right upper paratracheal (2R, n = 4) regions. The frequency of mediastinal LAP was higher in patients with aortic regurgitation (2 of 2, 100%) followed by mitral regurgitation (8 of 11, 73%); it was also high in patients with pulmonary edema (80%), pleural effusion (81%), or both (77%), as compared to patients without pulmonary edema or pleural effusion (17%) (p = 0.001). Ten of 30 patients showed an abnormal EF of < 55%; among them, 8 had mediastinal LAP. However, the relationship between EF and LAP was not statistically significant (p = 0.058). Mediastinal LN enlargement is common in patients with VHD, especially in cases of pulmonary edema and pleural effusion. Enlarged mediastinal LNs were frequently observed with abnormal EF, however, the relationship between EF and mediastinal LAP was not statistically significant.

Sternal reconstruction after post-sternotomy mediastinitis

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Pankaj Kaul

2017-11-01

Full Text Available Abstract Background Deep sternal wound complications are uncommon after cardiac surgery. They comprise sternal dehiscence, deep sternal wound infections and mediastinitis, which will be treated as varying expressions of a singular pathology for reasons explained in the text. Methodology and review This article reviews the definition, prevalence, risk factors, prevention, diagnosis, microbiology and management of deep sternal wound infections and mediastinitis after cardiac surgery. The role of negative pressure wound therapy and initial and delayed surgical management is discussed with special emphasis on plastic techniques with muscle and omental flaps. Recent advances in reconstructive surgery are presented. Conclusions Deep sternal wound complications no longer spell debilitating morbidity and high mortality. Better understanding of risk factors that predispose to deep sternal wound complications and general improvement in theatre protocols for asepsis have dramatically reduced the incidence of deep sternal wound complications. Negative pressure wound therapy and appropriately timed and staged muscle or omental flap reconstruction have transformed the outcomes once these complications occur.

Endoscopic ultrasound with fine needle aspiration and biopsy in lung cancer and isolated mediastinal lymphadenopathy.

LENUS (Irish Health Repository)

Nadarajan, P

2010-03-01

Endoscopic ultrasound with fine-needle aspiration and biopsy (EUS-FNAB) is well established in diagnosing and staging lung cancer in patients with mediastinal adenopathy. EUS-FNAB is highly sensitive, less invasive and has lower complication rates when compared to surgical staging of mediastinal nodes. In this study we describe our experience of EUS-FNAB in lung cancer and other causes of mediastinal lymphadenopathy. EUS-FNAB was performed for assessment of PET positive mediastinal lymph nodes between January 2007 and March 2009 in AMNCH. The endpoints of our study were sensitivity and specificity of EUS-FNAB, morbidity and length of hospital stay. Thirty four patients underwent EUS-FNAB during the study period for both diagnosis and staging. Thirty patients had positive lymph node invasion and 4 had no evidence of malignant invasion. In these 4 patients negative cytology was confirmed on mediastinoscopy giving EUS-FNAB a sensitivity and specificity of 100%. EUS-FNAB upstaged the disease in 12 patients. EUS-FNAB is a reliable tool for mediastinal staging in lung cancer, significantly reducing the need for surgical staging procedures in patients with suspected mediastinal involvement.

Successful repeat transcatheter ablation of a mediastinal parathyroid adenoma 6 years after alcohol embolization

International Nuclear Information System (INIS)

Cook, Gary J. R.; Fogelman, Ignac; Reidy, John F.

1997-01-01

Recurrent hyperparathyroidism is rare following transcatheter ablation of mediastinal parathyroid adenomas. When it occurs it is usually early and resistant to further attempts at ablation. We present a patient with primary hyperparathyroidism in whom two surgical attempts at cure had been unsuccessful. Subsequently, a mediastinal adenoma was demonstrated angiographically and embolized with absolute alcohol. Hyperparathyroidism recurred 6 years later and the mediastinal adenoma was subsequently successfully ablated a second time by angiographic embolization with ionic contrast medium

Platigástridos (Hymenoptera: Platygastridae parasitoides de Pentatomidae en Córdoba. Caracterización de las masas de huevos parasitoidizadas y aspectos biológicos

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Norma LA PORTA

2013-01-01

Full Text Available Se caracterizan las masas de huevos parasitoidizadas de pentatómidos per - tenecientes a cinco especies, cuatro fitófagas y una depredadora. Además, se analizan aspectos biológicos de esas oviposturas (abundancia y parasitoidismo y de sus para - sitoides (proporción sexual y emergencia: cinco especies de microhimenópteros plati - gástridos pertenecientes a los géneros Trissolcus Ashmead, Telenomus Haliday y Gryon Haliday . El análisis de las masas de huevos de pentatómidos en el campo apor ta indi - cadores exomorfológicos para determinar si están o no parasitoidizadas y, en algunos casos, conocer la especie de parasitoide emergente. Los altos niveles de parasitoidismo registrados en ambos sitios muestreados –Marcos Juárez y zona periurbana de Córdoba, sugieren que los parasitoides oófagos inciden de manera importante en las poblaciones de hemípteros presentes en el cultivo de soja. Las especies parasitoides mostraron una proporción de sexos marcadamente sesgada hacia las hembras, con un comportamiento similar respecto a cada huésped con el que interactuaron. Los porcentajes de emergencia resultaron más variables dependiendo de la especie parasitoide, del huésped y del sitio. El multiparasitoidismo fue registrado en todas las especies con excepción de Nezara viridula L. Telenomus podisi Ashmead fue el parasitoide común en las combinaciones observadas, resultando T. podisi-Trissolcus urichi Crawford la más frecuente.

Visionary Leadership: Gaya Kepemlmpinan untuk Organisasi Masa Depan

OpenAIRE

-, Triyono

2012-01-01

Lingkungan Bisnis Masa Depan adalah lingkungan yang penuh ketidakpastian: Hal ini menyebabkan tingkat ketidakpastian dan ketidak-efektifan rencana strategis Perusahaan meningkat. Dalam kaitan inilah visionary leadership diperlukan guna mengendalikan Perusahaan di tengah-tengah gejolak lingkungan bisnis yang tak pasti.

difusividad, masa, humedad, volumen y sólidos en yacón (Smallantus sonchifolius deshidratado osmóticamente

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Julio Rojas Naccha

2012-01-01

Full Text Available Se evaluó la capacidad predictiva de la Red Neuronal Artificial (RNA en el efecto de la concentración (30,40, 50 y 60 % p/p y temperatura (30, 40 y 50°C de la solución de fructooligosacaridos (FOS en la masa,humedad, volumen y sólidos en cubos de yacón osmodeshidratados, y en el coeficiente de difusividad efectivamedia del agua, con y sin encogimiento. Se aplicó la RNA del tipoFeedforwardcon los algoritmos deentrenamientoBackpropagationy de ajuste de pesosLevenberg-Marquardt, usando la topología: error metade 10-5, tasa de aprendizaje de 0.01, coeficiente de momento de 0.5, 2 neuronas de entrada, 6 neuronas desalida, una capa oculta con 18 neuronas, 15 etapas de entrenamiento y funciones de transferencialogsig-purelin. El error promedio global por la RNA fue 3.44% y los coeficientes de correlación fueron mayores a0.9. No se encontraron diferencias significativas entre los valores experimentales con losvalores predichos porla RNA y con los valores predichos por un modelo estadístico de regresión polinomial de segundo orden (p >0.95.Palabras clave:Red Neuronal Artificial (RNA, difusividad efectiva, yacón, deshidratación osmótica

Respuesta de cultivares de Musa spp. al estrés hídrico in vitro inducido con polietilenglicol 6000

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Leonardo Julio Moreno-Bermúdez

2017-07-01

Full Text Available Los plátanos y bananos son cultivos sensibles al déficit hídrico. Las sequías cada vez más prolongadas sugieren la necesidad de obtener plantas tolerantes a este factor; la selección temprana de estas plantas, comparada con la selección en campo, permite ahorrar tiempo y trabajar con mayores volúmenes de individuos. Para ello es conveniente contar con cultivares patrones cuya respuesta al déficit hídrico in vitro sea favorable. El objetivo del presente trabajo fue determinar la respuesta de cultivares de Musa spp. con diferente composición genómica al estrés hídrico inducido in vitro con polietilenglicol 6000 (PEG-6000. Se estudiaron los cultivares ‘Pelipita’ (ABB, ‘Manzano’ (AAB y ‘Grande naine’ (AAA. El estrés se indujo con 30 g/L de PEG-6000 en medio de cultivo semisólido de multiplicación. A los 30 días se evaluaron variables indicadoras de estrés morfológicas (altura y número de brotes por explante, fisiológicas (masa fresca y masa seca y bioquímicas (contenido prolina, peróxido de hidrógeno y malondialdehido. En el cultivar ‘Pelipita’ se afectó solamente la altura de las plantas, mientras que en los demás se afectaron todas las variables excepto la masa seca en el ‘Manzano’. En este último y en el ‘Grande naine’ se incrementó la prolina, el peróxido de hidrógeno y el malondialdehido, lo que evidenció un mayor estrés oxidativo y daño en las membranas celulares. Los cultivares estudiados, pudieran emplearse como controles de tolerancia (‘Pelipita’ y sensibilidad (‘Grande naine’ y ‘Manzano’ en la selección in vitro de plantas tolerantes a la sequía, en futuros programas de mejoramiento genético.

Treatment Experience of Continuous Negative Pressure Drainage in the Acute Anterior Mediastinal Infection of Oropharyngeal Origined

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Anping CHEN

2018-04-01

Full Text Available Background and objective Mediastinal infection is a serious infection of mediastinal connective tissue, with more complications and higher mortality. Application of broad-spectrum antibiotics and nutritional support, early sufficient drainage is the key to successful treatment. In the mode of drainage, this paper discusses the application of continuous negative pressure drainage technique to treat acute anterior mediastinal infection of severe mouth pharynx source, and the good results are summarized and shared. Methods In January to December in 2017, a total of 17 cases treated acute mediastinal infection is derived from the throat, has formed a mediastinal abscess, surgery adopts retrosternal counterpart negative pressure drainage way, namely the sternum nest and free sternum xiphoid process under the incision on the first mediastinal clearance, make breakthrough and placed drainage device, suture closed wound, continuous negative pressure drainage, negative pressure using 3 cm-5 cm water column. Results Among the 17 patients, 14 patients were relieved by continuous negative pressure drainage, and then the drainage tube was removed. In 2 cases, the infection broke into the right thoracic cavity, and the closed drainage caused the negative pressure to disappear, and the negative pressure drainage was replaced by the conventional drainage, and the drainage tube was removed after the drainage tube was clear. One patient had formed a mediastinal abscess incision drainage time later, complicated with septic shock and sepsis, resulting in the death of multiple organ failure. Conclusion The traditional treatment of severe acute mediastinal infection is sternal incision and drainage. Continuous negative pressure drainage adequate drainage of mediastinal can relieve patients' pain, effusion, and avoid the dressing out repeatedly. It is an effective method. However, there are limitations in this method, which need to be further optimized.

Cyclophosphamide-induced cardiomyopathy in a patient with seminoma and a history of mediastinal irradiation

International Nuclear Information System (INIS)

Kamezaki, Kenjirou; Fukuda, Takahiro; Makino, Shigeyoshi; Harada, Mine

2005-01-01

A 17-year-old man with mediastinal seminoma was treated with chemotherapy and mediastinal irradiation therapy. Then he received high-dose chemotherapy containing cyclophosphamide (CY) followed by autologous peripheral blood stem cell transplantation. He suffered from CY-induced cardiomyopathy beginning six days after the administration of high-dose CY. The predictable factors associated with the onset of CY-induced cardiomyopathy are not precisely known. It is suggested that the history of mediastinal irradiation was responsible for the onset of cardiomyopathy. (author)

The history of the management of sternal osteomyelitis and mediastinitis - from Hippocrates until today.

Science.gov (United States)

Ennker, Ina Carolin; Ennker, Jürgen C

2014-01-01

Even during the time of Hippocrates, Galen and their colleagues recognized mediastinal affections. However, they were not considered with the surgical treatment. First progress in the treatment options of this severe disease, still denoted as 'terra incognita', over to today's gold standard are pictured. The mediastinitis-registry which was founded by the German Society for Thoracic and Cardiovascular Surgery (DGTHG) in 2011 and the recent establishment of the study group to adopt a guideline 'diagnosis and therapy of postoperative mediastinitis/sternal osteomyelitis following cardiac surgery' are attempts to a standardization of the treatment. Substantial advancement in the treatment of postoperative mediastinitis could be achieved in the past. The mortality dropped as low as less than 10%. With these implementations more benefit for the patients' outcome can be expected.

Relación del índice de masa corporal y la percepción de la imagen corporal que presentan las estudiantes de los planteles de nivel medio fiscales del área urbana y rural del cantón Ibarra, provincia de Imbabura, 2010.

OpenAIRE

Farinango Anaguano, Nancy Beatriz

2010-01-01

Establecer la correlación entre el Índice de Masa Corporal con la Percepción de la Imagen Corporal de las estudiantes de los planteles de nivel medio fiscales del área urbana y rural del cantón Ibarra, provincia de Imbabura, 2010. Varios autores refieren que el índice de masa corporal (IMC) es un indicador útil para evaluar la composición corporal, de igual manera en la adolescencia, la imagen corporal es altamente preocupante y la nutrición tiene un rol fundamental en la estructura corpor...

AUTOMATICTECTURE : OTOMATISASI PENUH DALAM ARSITEKTUR MASA DEPAN

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M Galieh Gunagama

2017-01-01

Full Text Available ABSTRAK. Teknologi memudahkan umat manusia dalam hidup, akan tetapi, perkembangan yang terjadi juga membawa dampak negatif berupa terancamnya sejumlah profesi dengan adanya otomatisasi. Proses otomatisasi telah menggantikan porsi pekerjaan manusia dengan mesin berkecerdasan, dan tren tersebut akan semakin membesar seiring berjalannya waktu. Dalam hubungannya dengan studi eksperimental dan prediksi masa depan, dunia rancang bangun juga memiliki kemungkinan untuk diotomatisasikan dengan adanya perkembangan dalam bidang arsitektur digital, robotika, dan kecerdasan buatan. Di tengah kondisi global yang serba cepat dan penuh dinamika, dunia arsitektur perlu mempersiapkan diri dalam menghadapi perkembangan tersebut jika tidak ingin segera digantikan. Diskusi dalam paper ini mencoba untuk mengeksplorasi lebih dalam dan memprediksikan profesi arsitek pada masa depan dalam skenario terbaik dan terburuk terkait perkembangan proses otomatisasi yang semakin tidak terhindarkan.   Kata kunci: Arsitektur Eksperimental, Arsitektur Digital, Teknologi, Masa Depan ABSTRACT. Technology facilitates mankind in life, however, developments that occurred also had a negative impact in the form of threats to a number of professions with automatization. Automation process has replaced the portion of human work with the intelligent machine, and the trend will be growing over time. In conjunction with experimental studies and future predictions, the design and construction field also have the possibility to be automated with the development in the field of digital architecture, robotics, and artificial intelligence. Amid the global fast-paced and dynamic environment, architecture needs to be prepared in facing such developments if do not want to immediately replaced. The discussion in this paper attempts to explore deeper and predict the future of the profession in the best and worst case scenario related to the development of automation process which is increasingly

Mycoplasma hominis Induces Mediastinitis after a Tonsillar Abscess

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Anna Grancini

2016-01-01

Full Text Available Mycoplasma hominis is commonly involved in genitourinary tract infections. We report a 59-year-old man who developed a M. hominis-associated mediastinitis following acute tonsillar infection.

MASA syndrome is caused by mutations in the neural cell adhesion gene, L1CAM

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Schwartz, C.E.; Wang, Y.; Schroer, R.J.; Stevenson, R.E. [Greenwood Genetic Center, SC (United States)

1994-09-01

The MASA syndrome is a recessive X-linked disorder characterized by Mental retardation, Adducted thumbs, Shuffling gait and Aphasia. Recently we found that MASA in one family was likely caused by a point mutation in exon 6 of the L1CAM gene. This gene has also been shown to be involved in X-linked hydrocephalus (HSAS). We have screened 60 patients with either sporadic HSAS or MASA as well as two additional families with MASA. For the screening, we initially utilized 3 cDNA probes for the L1CAM gene. In one of the MASA families, K8310, two affected males were found to have an altered BglII band. The band was present in their carrier mother but not in their normal brothers. This band was detected by the entire cDNA probe as well as the cDNA probe for 3{prime} end of the gene. Analysis of the L1CAM sequence indicated the altered BglII site is distal to the exon 28 but proximal to the punative poly A signal site. It is hypothesized that this point mutation alters the stability of the L1CAM mRNA. This is being tested using cell lines established from the two affected males.

En la búsqueda de características en eyecciones coronales de masa que discriminen entre dos paradigmas físicos en modelos de ECMs

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Paissan, G.; Stenborg, G.; Rovira, M.

Se conocen tres diferentes fenómenos de gran escala que ocurren en la atmósfera solar, denominados eyecciones coronales de masa (ECMs), protuberancias eruptivas y grandes fulguraciones de dos bandas. Estos fenómenos están estrechamente relacionados y podrían ser distintas manifestaciones de un único proceso físico. Las ECMs son definidas como eyecciones de gran escala de masa y flujo magnético desde la baja corona al espacio interplanetario. Desde su descubrimiento en los '70, muchos modelos han sido propuestos para explicar su origen y evolución. La explicación física de las ECMs es un tema de debate intenso. No obstante, los modelos pueden sintetizarse en dos grandes grupos: 1) los modelos de inyección de flujo y 2) los modelos de almacenamiento y liberación. En este trabajo, se presentan los estudios realizados con una serie de eventos observados con el coronógrafo MICA (Mirror Coronograph for Argentina), el telescopio en H-alfa HASTA (H-alpha Solar Telescope for Argentina) y los coronógrafos C2 y C3 de la sonda SOHO (Solar and Heliospheric Observatory). Los eventos que pudieron ser identificados como ECMs son contrastados dentro del esquema de los dos paradigmas teóricos propuestos.

Anaesthetic Management of Caesarean Section in a Patient with Large Mediastinal Mass

International Nuclear Information System (INIS)

Kashif, S.; Saleem, J.

2015-01-01

Pregnancy is associated with both anatomical and physiological changes in the body, especially in cardiovascular and respiratory systems. Patients with anterior and middle mediastinal masses are recognized to be at risk for cardiorespiratory compromise. Likewise, pregnancy has a widely known constellation of potential complications that confront the anaesthesiologist. The combination of both (pregnancy and mediastinal mass) in a single patient presents an unusual anaesthetic challenge. Caesarean sections are usually the mode of delivery, therefore, the cardio-respiratory stability is very important. The following is the report of a 31 weeks pregnant patient with a large, symptomatic anterior and middle mediastinal mass, who required anaesthesia for emergency caesarean section. The anaesthetic management entailed Combined Spinal and Epidural (CSE) technique with safe feto-maternal outcome. (author)

Mediastinal pancreatic pseudocyst with isolated thoracic symptoms: a case report

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Drescher Robert

2008-05-01

Full Text Available Abstract Introduction Mediastinal pancreatic pseudocysts represent a rare complication of acute or chronic pancreatitis. Case presentation A 55-year-old man with a history of chronic pancreatitis was admitted with intermittent dyspnea, dysphagia and weight loss. Chest X-ray, computed tomography and magnetic resonance imaging revealed a large paracardial pancreatic pseudocyst causing cardiac and esophageal compression. Conclusion Mediastinal pancreatic pseudocysts are a rare complication of chronic pancreatitis. These pseudocysts may lead to isolated thoracic symptoms. For accurate diagnostic and therapy planning, a multimodal imaging approach is necessary.

Apparent Diffusion Coefficient Measurement in Mediastinal Lymphadenopathies: Differentiation between Benign and Malignant Lesions

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Fethi Emre Ustabasioglu

2017-01-01

Full Text Available Objectives: We aimed to prospectively assess the diagnostic value of apparent diffusion coefficient (ADC measurement in the differentiation of benign and malignant mediastinal lymphadenopathies. Materials and Methods: The study included 63 consecutive patients (28 women, 35 men; mean age 59.3 years with 125 mediastinal lymphadenopathies. Echoplanar diffusion-weighted magnetic resonance imaging of the mediastinum was performed with b-factors of 0 and 600 mm2/s before mediastinoscopy and mediastinotomy, and ADC values were measured. The ADC values were compared with the histological results, and statistical analysis was done. P < 0.05 was considered statistically significant. Results: The mean ADC value of malignant mediastinal lymphadenopathy (1.030 ± 0.245 × 10−3 mm2/s was significantly lower (P < 0.05 when compared to benign lymphadenopathies (1.571 ± 0.559 × 10−3 mm2/s. For differentiating malignant from benign mediastinal lymphadenopathy, the best result was obtained when an ADC value of 1.334 × 10−3 mm2/s was used as a threshold value; area under the curve 0.848, accuracy 78.4%, sensitivity 66%, specificity of 86%, positive predictive value 76.7%, and negative predictive value of 79.2%. Interobserver agreement was excellent for ADC measurements. Conclusions: ADC measurements could be considered an important supportive method in differentiating benign from malignant mediastinal lymphadenopathies.

Mediastinal large cell lymphoma with sclerosis

International Nuclear Information System (INIS)

Franco, Sergio; Pulcheri, Wolmar; Spector, Nelson; Nucci, Marcio; Oliveira, Halley P. de; Morais, Jose Carlos; Romano, Sergio

1995-01-01

Five cases of primary mediastinal large-cell lymphoma with sclerosis diagnosed at the University Hospital Clementino Fraga Filho (Federal University of Rio de Janeiro) between 1986 and 1994 were identified. They were studied on clinical, morphological and immuno-histochemical grounds. Clinically, the disease was characterized by the young age of the patients, mediastinal involvement by bulky disease and compressive symptoms. None of the patients had evidence of extra-thoracic disease as presentation. On morphological grounds they had evidence of extra-thoracic disease at presentation. On morphological grounds they showed a mixture of immuno blasts and large follicular enter cell with sclerosis. Three of five cases proved to be of B-cell origin. Four of five patients were treated with chemotherapy. Cases 1 and with MACOP-B, and cases 3 and 4 with Pro-MACE-cytaBOM and consolidation radiation therapy. All the patients achieved a complete remission, and are alive, free of disease, with a follow-up of 1 to 8 years. (author). 28 refs., 8 figs., 2 tabs

Stereotactic body radiation therapy for isolated hilar and mediastinal non-small cell lung cancers.

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Horne, Zachary D; Richman, Adam H; Dohopolski, Michael J; Clump, David A; Burton, Steven A; Heron, Dwight E

2018-01-01

The seminal phase II trial for pulmonary stereotactic body radiation therapy (SBRT) suggested that SBRT to central lesions resulted in unacceptable toxicity. Alternative dose-fractionation schemes have been proposed which may improve safety without compromise of efficacy. We report our institutional outcomes of SBRT for hilar/mediastinal non-small cell lung cancer (NSCLC). A retrospective review was conducted of patients with NSCLC in a hilar or mediastinal nodal station which was treated with SBRT. Patients presented with a lesion involving the hilum or mediastinum from primary or oligorecurrent NSCLC. Kaplan-Meier with log-rank testing and Cox analysis were utilized for outcomes analysis. From 2008-2015, 40 patients with median age of 70 were treated with SBRT for primary/oligorecurrent hilar/mediastinal NSCLC with median follow-up of 16.4 months. 85% presented with oligorecurrent disease at a median of 22.4 months following definitive therapy. The aortico-pulmonary window was the target in 40%, the hilum in 25%, lower paratracheal in 20%, subcarinal in 10%, and prevascular in 5%. The median dose was 48Gy in 4 fractions (range: 35-48Gy in 4-5 fractions). Median overall (OS) and progression-free (PFS) survivals were 22.7 and 13.1 months, respectively. Two-year local control was 87.7% and not significantly different between hilar and mediastinal targets. Median PFS was significantly improved in patients with hilar vs mediastinal nodal targets: 33.3 vs 8.4 months, respectively (p=0.031). OS was not statistically different between hilar and mediastinal targets (p=0.359). On multivariable analysis, hilar vs mediastinal target predicted for PFS (HR 3.045 95%CI [1.044-8.833], p=0.042), as did shorter time to presentation in patients with oligorecurrence (HR 0.983 [95%CI 0.967-1.000], p=0.049). Acute grade 3+ morbidity was seen in 3 patients (hemoptysis, pericardial/pleural effusion, heart failure) and late grade 3+ morbidity (hemoptysis) in 1 patient. Hilar/mediastinal

Lymphopenia after mediastinal irradiation in lung cancer

International Nuclear Information System (INIS)

Oh, Yoon Kyeong; Park, Hee Chul; Lee, Seung Il; Ryu, So Yeon; Kee, Keun Hong; Jeon, Ho Jong; Ha, Chul Soo

2002-01-01

This study was undertaken to retrospectively evaluate white blood cell kinetics, especially lymphocyte depression after different treatment, and to find the correlation between immunosuppression and large blood volume and dynamic blood flow within the mediastinal radiotherapy (RT) field in lung cancer. Thirty-four patients with lung cancer were retrospectively evaluated: 10 patients had only radiotherapy (RT group), 8 had chemotherapy (CT group) and 16 had chemotherapy and radiotherapy (RT/CT group). The mean follow-up periods of the RT-including groups (RT group and RT/CT group) and the RT-excluding group (CT group) were 6 and 8 months, respectively. Complete blood cell count including lymphocyte percentage (%) were checked weekly during RT but less frequently during CT and after RT. Changes in total white blood cell counts were not significantly different among the three groups. The lymphocyte count and lymphocyte % were much lower in the RT-including groups than in the RT-excluding group. The difference between pre-treatment and final lymphocyte count and the difference between pre-treatment and final lymphocyte % were significant (ρ = 0.044 and ρ = 0.037) between the RT-including groups and the RT-excluding group. Lymphopenia was more marked after treatment containing RT than CT only. Lymphopenia may be one cause of a compromised immune system after mediastinal irradiation in lung cancer. We suggest cautiously that previous studies showing evidence of lymphocyte apoptosis after low-dose irradiation and large blood volume and dynamic blood flow within the RT fields could be somewhat related to lymphopenia after mediastinal irradiation

PERSEPSI DAN SIKAP PEREMPUAN TIONGHOA TERHADAP DINAMIKA POLITIK MASA REFORMASI DI KABUPATEN NGAWI

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Khoirul Huda

2017-11-01

Full Text Available Penelitian ini bertujuan untuk mengetahui persepsi dan sikap kaum perempuan Tionghoa terhadap dinamika politik masa reformasi di Kabupaten Ngawi pada pelaksanaan pemilu Tahun 2014. Metode penelitian ini adalah kualitatif  dengansumber data primer diperoleh melalui wawancara informan dan data sekunder berupa foto atau arsip/dokumen diperoleh ketika observasi masyarakat perempuanTionghoa Kabupaten Ngawi.Analisis data menggunakan analisis data model interaktif Miles dan Huberman yang bergerak pada tiga tahap yaitu reduksi, sajian data dan verifikasi data. Berdasarkan hasil penelitian mengungkapkan bahwa persepsi dan sikap perempuan pada masyarakat Tionghoa dalam dinamika politik masa Reformasi kurang memiliki pengaruh yang signifikan. Kemudian mereka menganggap bahwa masa reformasi pasca tahun 1998 masih mempunyai sikap nasionalisme yang tinggi, akan tetapiseiring berjalannya waktu nasionalisme tersebut berubah pada bentuk tidak nasionalis, sebab banyak kasus korupsi oleh petinggi negara. Di dalam hal ini perempuan pada masyarakat Tionghoa tidak berpihak terhadap kepemimpinan mana yang layak dan baik, karena semua pemimpin dengan segala kebijakannya terdapat unsur positif dan negatif.Masyarakat Tionghoa khususnya perempuan kurang mempunyai andil dalam dimensi politik.Hal tersebut disebabkan karena mereka mimiliki jiwa dagang (bisnis yang tinggi dan sikap mereka dalamhal berpolitik dapat dilihat tatkala menggunakan hak suara dalam pemilihan umum yang dilakukan sejak masa reformasi hingga sekarang.

Benign giant mediastinal schwannoma presenting as cardiac tamponade in a woman: a case report

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Sekiya Mitsuaki

2011-02-01

Full Text Available Abstract Introduction Mediastinal schwannomas are typically benign and asymptomatic, and generally present no immediate risks. We encountered a rare case of a giant benign posterior mediastinal schwannoma, complicated by life-threatening cardiac tamponade. Case presentation We report the case of a 72-year-old Japanese woman, who presented with cardiogenic shock. Computed tomography of the chest revealed a posterior mediastinal mass 150 cm in diameter, with pericardial effusion. The cardiac tamponade was treated with prompt pericardial fluid drainage. A biopsy was taken from the mass, and after histological examination, it was diagnosed as a benign schwannoma, a well-encapsulated non-infiltrating tumor, originating from the intrathoracic vagus nerve. It was successfully excised, restoring normal cardiac function. Conclusion Our case suggests that giant mediastinal schwannomas, although generally benign and asymptomatic, should be excised upon discovery to prevent the development of life-threatening cardiopulmonary complications.

MDCT assessment of tracheomalacia in symptomatic infants with mediastinal aortic vascular anomalies: preliminary technical experience

International Nuclear Information System (INIS)

Lee, Edward Y.; Mason, Keira P.; Zurakowski, David; Waltz, David A.; Ralph, Amy; Riaz, Farhana; Boiselle, Phillip M.

2008-01-01

Mediastinal aortic vascular anomalies are relatively common causes of extrinsic central airway narrowing in infants with respiratory symptoms. Surgical correction of mediastinal aortic vascular anomalies alone might not adequately treat airway symptoms if extrinsic narrowing is accompanied by intrinsic tracheomalacia (TM), a condition that escapes detection on routine end-inspiratory imaging. Paired inspiratory-expiratory multidetector CT (MDCT) has the potential to facilitate early diagnosis and timely management of TM in symptomatic infants with mediastinal aortic vascular anomalies. To assess the technical feasibility of paired inspiratory-expiratory MDCT for evaluating TM among symptomatic infants with mediastinal aortic vascular anomalies. The study group consisted of five consecutive symptomatic infants (four male, one female; mean age 4.1 months, age range 2 weeks to 6 months) with mediastinal aortic vascular anomalies who were referred for paired inspiratory-expiratory MDCT during a 22-month period. CT angiography was concurrently performed during the end-inspiration phase of the study. Two pediatric radiologists in consensus reviewed all CT images in a randomized and blinded fashion. The end-inspiration and end-expiration CT images were reviewed for the presence and severity of tracheal narrowing. TM was defined as ≥50% reduction in tracheal cross-sectional luminal area between end-inspiration and end-expiration. The presence of TM was compared to the bronchoscopy results when available (n = 4). Paired inspiratory-expiratory MDCT was technically successful in all five patients. Mediastinal aortic vascular anomalies included a right aortic arch with an aberrant left subclavian artery (n = 2), innominate artery compression (n = 2), and a left aortic arch with an aberrant right subclavian artery (n 1). Three (60%) of the five patients demonstrated focal TM at the level of mediastinal aortic vascular anomalies. The CT results were concordant with the results

The history of the management of sternal osteomyelitis and mediastinitis – from Hippocrates until today

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Ennker, Ina Carolin

2014-06-01

Full Text Available Even during the time of Hippocrates, Galen and their colleagues recognized mediastinal affections. However, they were not considered with the surgical treatment. First progress in the treatment options of this severe disease, still denoted as ‘terra incognita’, over to today’s gold standard are pictured.The mediastinitis-registry which was founded by the German Society for Thoracic and Cardiovascular Surgery (DGTHG in 2011 and the recent establishment of the study group to adopt a guideline ‘diagnosis and therapy of postoperative mediastinitis/sternal osteomyelitis following cardiac surgery’ are attempts to a standardization of the treatment. Substantial advancement in the treatment of postoperative mediastinitis could be achieved in the past. The mortality dropped as low as less than 10%. With these implementations more benefit for the patients’ outcome can be expected.

The history of the management of sternal osteomyelitis and mediastinitis – from Hippocrates until today

Science.gov (United States)

Ennker, Ina Carolin; Ennker, Jürgen C.

2014-01-01

Even during the time of Hippocrates, Galen and their colleagues recognized mediastinal affections. However, they were not considered with the surgical treatment. First progress in the treatment options of this severe disease, still denoted as ‘terra incognita’, over to today’s gold standard are pictured. The mediastinitis-registry which was founded by the German Society for Thoracic and Cardiovascular Surgery (DGTHG) in 2011 and the recent establishment of the study group to adopt a guideline ‘diagnosis and therapy of postoperative mediastinitis/sternal osteomyelitis following cardiac surgery’ are attempts to a standardization of the treatment. Substantial advancement in the treatment of postoperative mediastinitis could be achieved in the past. The mortality dropped as low as less than 10%. With these implementations more benefit for the patients’ outcome can be expected. PMID:26504718

Malignant versus benign mediastinal lesions: quantitative assessment with diffusion weighted MR imaging

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Guemuestas, Sevtap; Inan, Nagihan; Sarisoy, Hasan Tahsin; Anik, Yonca; Arslan, Arzu; Ciftci, Ercuement; Akansel, Guer; Demirci, Ali [University of Kocaeli, Department of Radiology, School of Medicine, Umuttepe Kocaeli (Turkey)

2011-11-15

We aimed to evaluate the performance of diffusion-weighted magnetic resonance imaging in differentiating malignant from benign mediastinal lesions. Fifty-three mediastinal lesions were examined with T1- and T2-weighted (W) conventional images. Then, two diffusion-weighted images were obtained with b = 0 and 1000 s/mm{sup 2} values and apparent diffusion coefficients (ADC) were calculated. The statistical significance of differences between measurements was tested using the Student-t test. The mean ADC of malignant lesions was significantly lower than that of the benign masses (p < 0.001). The cut-off value of {<=} 1.39 x 10{sup -3} mm{sup 2}/s indicated a malignant lesion with a sensitivity of 95% and specificity of 87%. Diffusion-weighted imaging may be helpful in differentiating benign from malignant mediastinal masses. (orig.)

Tracheal Compression Caused by a Mediastinal Hematoma After Interrupted Aortic Arch Surgery.

Science.gov (United States)

Hua, Qingwang; Lin, Zhiyong; Hu, Xingti; Zhao, Qifeng

2017-08-03

Congenital abnormalities of the aortic arch include interrupted aortic arch (IAA), coarctation of the aorta (CoA), and double aortic arch (DAA). Aortic arch repair is difficult and postoperative complications are common. However, postoperative tracheobronchial stenosis with respiratory insufficiency is an uncommon complication and is usually caused by increased aortic anastomotic tension. We report here a case of tracheal compression by a mediastinal hematoma following IAA surgery. The patient underwent a repeat operation to remove the hematoma and was successfully weaned off the ventilator.In cases of tracheobronchial stenosis after aortic arch surgery, airway compression by increased aortic anastomotic tension is usually the first diagnosis considered by clinicians. Other causes, such as mediastinal hematomas, are often ignored. However, the severity of symptoms with mediastinal hematomas makes this an important entity.

Early experience using the da Vinci Surgical System for the treatment of mediastinal tumors.

Science.gov (United States)

Kajiwara, Naohiro; Taira, Masahiro; Yoshida, Koichi; Hagiwara, Masaru; Kakihana, Masatoshi; Usuda, Jitsuo; Uchida, Osamu; Ohira, Tatsuo; Kawate, Norihiko; Ikeda, Norihiko

2011-10-01

The da Vinci Surgical System has been used in only a few cases for treating mediastinal tumors in Japan. Recently, we used the da Vinci Surgical System for various types of anterior and middle mediastinal tumors in clinical practice. We report our early experience using the da Vinci Surgical System. Seven patients gave written informed consent to undergo robotic surgery for mediastinal tumor dissection using the da Vinci Surgical System. We evaluated the safety and feasibility of this system for the surgical treatment of mediastinal tumors. Two specialists in thoracic surgery who are certified to use the da Vinci S Surgical System and another specialist acted as an assistant performed the tumor dissection. We were able to access difficult-to-reach areas, such as the mediastinum, safely. All the resected tumors were classified as benign tumors histologically. The average da Vinci setting time was 14.0 min, the average working time was 55.7 min, and the average overall operating time was 125.9 min. The learning curve for the da Vinci setup and manipulation time was short. Robotic surgery enables mediastinal tumor dissection in certain cases more safely and easily than conventional video-assisted thoracoscopic surgery and less invasively than open thoracotomy.

Near-infrared intraoperative imaging during resection of an anterior mediastinal soft tissue sarcoma.

Science.gov (United States)

Predina, Jarrod D; Newton, Andrew D; Desphande, Charuhas; Singhal, Sunil

2018-01-01

Sarcomas are rare malignancies that are generally treated with multimodal therapy protocols incorporating complete local resection, chemotherapy and radiation. Unfortunately, even with this aggressive approach, local recurrences are common. Near-infrared intraoperative imaging is a novel technology that provides real-time visual feedback that can improve identification of disease during resection. The presented study describes utilization of a near-infrared agent (indocyanine green) during resection of an anterior mediastinal sarcoma. Real-time fluorescent feedback provided visual information that helped the surgeon during tumor localization, margin assessment and dissection from mediastinal structures. This rapidly evolving technology may prove useful in patients with primary sarcomas arising from other locations or with other mediastinal neoplasms.

Localization fibrosing mediastinitis causing pulmonary infraction: A case report

Energy Technology Data Exchange (ETDEWEB)

Sur, Young Keun; Kim, Eun Young; Kang, Doo Kyoung; Park, Kyung Joo; Koh, Young Wha; Sun, Joo Sung [Ajou University School of Medicine, Suwon (Korea, Republic of)

2016-06-15

A 44-year-old female patient visited our emergency room for hemoptysis and refractory chest wall pain of 2 months duration. She had no history of smoking or other medical conditions. Chest CT scan showed homogenously enhancing soft tissue mass without calcification at the left pulmonary hilum. Encasing and compression of the left lower pulmonary artery by the mass had resulted in pulmonary infarction in the left lower lobe. Laboratory tests for tuberculosis, fungus, and vasculitis were all negative. The patient underwent surgical biopsy and resection of infarcted left lower lobe that was histopathologically confirmed as fibrosing mediastinitis. Herein, we reported a rare case of surgically confirmed and treated localized fibrosing mediastinitis causing pulmonary infarction.

Detectability of the mediastinal lines : comparison of conventional film-screen radiography and digital radiography

International Nuclear Information System (INIS)

Shin, Hye Young; Park, Kyung Joo; Kang, Doo Kyung; Lee, Kang Lai; Han, Chaing Jin; Suh, Jung Ho

1998-01-01

Using dynamic range compression (DRC) processing, this study compared the detectability of mediastinal lines by conventional film screen radiography (FS) and by storage phosphor digital radiography (DR). We selected 200 normal consecutive chest radiographs (100 FS, 100 DR); dynamic range compression was applied to DR processing and moving grids were used in both systems. Seven mediastinal lines (left paraspinal, right paraspinal, azygoesophageal, left para-aortic, posterio junctional, anterior junctional and right paratracheal) were scored from 0 point to 3 point (0: not visible, 1 : suspiciously visible, 2 : visible, but not clear, 3: clearly visible) according to visibility and sharpness, as agreed by a radiologist and a resident. The differences between the two modalities were compared and analyzed by chi-square test. DR processed with DRC visualizes mediastinal lines more frequently and clearly than conventional FS, and is therefore thought to be useful for the evaluation of mediastinal diseases. (author). 14 refs., 2 tabs., 2 figs

Fluorine-18-Fluorodeoxyglucose PET in the mediastinal nodal staging of bronchogenic carcinoma.

Energy Technology Data Exchange (ETDEWEB)

Berlangieri, S.U.; Scott, A.M.; Knight, S.; Pointon, O.; Thomas, D.L.; O``Keefe, G.; Chan, J.G.; Egen, G.F.; Tochon-Danguy, H.J.; Clarke, C.P.; McKay, W.J. [Austin Hospital, Melbourne, VIC (Australia). Centre for Positron Emission Tomography and the Departments of Nuclear Medicine and Thoracic Surgery

1998-03-01

Full text: Non-invasive methods of pre-operative staging of non-small cell bronchogenic carcinoma are inaccurate. To determine the clinical role of positron emission tomography (PET) in the mediastinal staging of lung carcinoma, {sup 18}F-fluorodeoxyglucose (FDG) studies were performed in 25 patients with suspected non-small cell bronchogenic carcinoma and correlated with pathology. The patients comprised 20 men and 5 women (mean age 63; range 43-78 y). All patients had proven non-small cell lung carcinoma, except two, one patient with benign inflammatory disease and the other with small cell carcinoma. The FDG PET studies were acquired on a Siemens 951131R body tomography over 2-3 bed positions to include the thorax and mediastinum. The PET images were interpreted for tumour involvement of mediastinal nodes according to the American Thoracic Society classification and scored for confidence of tumour presence on a 5 point scale. The intensity of glucose metabolism was compared to mediastinal blood pool activity and graded on a 4 point scale. FDG PET correctly excluded ipsilateral mediastinal nodal (N2) disease in 16 of 16 patients. Six of nine patients with N2 disease were correctly identified by FDG PET. Of the three patients with N2 nodal involvement not detected by PET, each had single station nodal disease, and in two patients the primary lesions abutted the involved nodal group. A total of 104 nodal stations were sampled or examined at surgery. FDG PET correctly excluded disease in 83/83 (100% specificity) negative nodal stations. FDG PET is a promising non-invasive functional imaging modality for the mediastinal staging of bronchogenic carcinoma.

Percepción de la propia imagen corporal en pacientes obesos o con sobrepeso.

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Faustino Abad Massanet

2012-08-01

Full Text Available La obesidad es un importante problema de salud en la comunidad, y su abordaje es complejo. La valoración de la propia imagen corporal podría ser de ayuda, en pacientes obesos o con sobrepeso, para orientar hacia la obtención de un peso más saludable. Con este objetivo se utilizó una escala de figuras (escala de Stunkard en pacientes de estas características, comparando la figura seleccionada por cada participante con la correspondiente a su Índice de Masa Corporal real. La concordancia entre ambas fue escasa, con marcado predominio de sujetos que infravaloran su IMC. El error en la valoración fue significativamente mayor entre las mujeres, en los participantes con menor nivel de estudios, y entre los que presentaban algún componente del síndrome metabólico.

Computed tomography of mediastinal masses

Energy Technology Data Exchange (ETDEWEB)

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

1984-09-15

The ability of CT scanning of the mediastinum to distinguish specific tissue densities and to display in a transverse plane often provides unique diagnostic information unobtainable with conventional radiographic methods. We retrospectively analyzed the CT findings of 20 cases of proven mediastinal masses at the Department of Radiology, St. Mary Hospital , Catholic Medical College from February 1982 to June 1984. CT scans were performed with a Siemens Somatom 2 scanner. The technical factors involved were tube voltage 125 kVp, exposure time 5 seconds, 230 mAs, 256 X 256 matrices, and pixel size 1.3 mm. 8 mm slices were obtained at 1 cm interval from the apex of the lung to the diaphragm. If necessary, additional scans at 5 mm interval or magnify scans were obtained. After pre-contrast scan, contrast scans were routinely taken with rapid drip-infusion of contrast media (60% Convey, 150 cc). The results obtained were as follows; 1. Among 20 cases, 11 were tumors, 4 infectious masses and 5 aneurysms of great vessels, tortuous brachiocephalic artery and pericardial fat pad. In each case CT showed accurate location, extent, and nature of the masses. 2. Solid tumors were thymic hyperplasias, thymoma, thymus carcinoid, neurilemmoma and germ cell tumors (seminoma, embryonal cell carcinoma). Internal architecture was homogeneous in thymoma, thymus carcinoid, neurilemmoma, seminoma but inhomogeneous in thymic hyperplasias and embryonal cell carcinoma. CT numbers ranged from 16 to 49 HU and were variably enhanced. 3. Cystic tumors consisted of teratomas, cystic hygroma, and neurilemmoma. Teratomas contained calcium and fat, inhomogeneous mass with strongly enhancing wall. Cystic hygroma was nonenhancing mass with HU of 20. 4. All of germ cell tumors (2 teratomas and one each of seminoma and embryonal cell carcinoma) and one of 2 thymic hyperplasias had calcium deposit. 5. Tuberculous lymphadenopathies presented as a mass in the retrocaval pretracheal space and hilar region

EFECTO DE UN PROTOCOLO DE ENTRENAMIENTO INTERVÁLICO DE ALTA INTENSIDAD SOBRE MASA GRASA CORPORAL EN ADOLESCENTES

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Alba Camacho-Cardenosa

2016-01-01

Full Text Available Fundamentos: La infancia y la adolescencia son etapas claves para el desarrollo de enfermedades crónicas, siendo la distribución de grasa un importante factor en este sentido. El objetivo del estudio fue evaluar los efectos sobre parámetros de grasa de un programa de alta intensidad desarrollado en adolescentes durante las clases de educación física. Métodos: Durante el año 2013, 35 escolares cacereños participaron en el estudio divididos en dos grupos. El grupo de alta intensidad realizó durante 8 semanas de 4 a 6 series de sprints de 20 segundos a máxima intensidad con una relación esfuerzo/recuperación de 1:3 a 1:1. El otro grupo desarrolló ejercicio aeróbico continuo durante el mismo tiempo. Se llevó a cabo una evaluación de la masa grasa antes y tras el programa de entrenamiento. El test ANOVA de medidas repetidas se usó para analizar si existían diferencias estadísticamente significativas entre ambos grupos. Resultados: El grupo de entrenamiento aeróbico continuo mostró diferencias estadísticamente significativas en el análisis intra-grupo en el porcentaje de masa grasa del tronco (Pre:15,66±4,16 vs Post:16,95±4,03; +1,29%; p=0,04 y el porcentaje de grasa total (Pre:21,58±3,93/ Post:22,34±3,70; p=0,05. Conclusiones: El programa de entrenamiento de actividad física de alta intensidad en la escuela llevado a cabo durante las clases de Educación Física no mejoró los parámetros de masa grasa evaluados. Sin embargo, el mantenimiento de estos parámetros podría ser un buen resultado durante el desarrollo de esta etapa, donde se produce un incremento.

Entrenamiento con restricción del flujo sanguíneo e hipertrofia muscular. [Blood flow restriction training and muscle hypertrophy].

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Carlos Reina-Ramos

2014-10-01

Full Text Available El entrenamiento de fuerza orientado a aumentar la masa muscular se ha convertido en un objetivo común en programas de entrenamiento tanto en deportistas de alto rendimiento como en personas que realizan programas de actividad física con objetivo de mejorar su salud o calidad de vida. Generalmente, el trabajo de fuerza orientado hacia la hipertrofia muscular se ha asociado con la utilización de altas cargas de trabajo (70-85% de 1 RM. Actualmente, se ha propuesto que el entrenamiento de fuerza con cargas de tan solo el 20% de 1 RM realizadas en condiciones de restricción del flujo sanguíneo podría provocar incrementos en los niveles de fuerza y masa muscular similares a los observados al ejercitarse con cargas altas. Dado que ciertos colectivos podrían beneficiarse del empleo de bajas cargas en sus programas de entrenamiento orientados a incrementar la masa muscular, el objetivo del presente trabajo de revisión bibliográfica ha sido el de revisar en la literatura las evidencias que existen en torno a la efectividad del entrenamiento con restricción del flujo sanguíneo a la hora de provocar hipertrofia muscular. Abstract Strength training focuses on increasing muscle mass has become in a frequent target in training programs in both elite athletes and people performing physical activity programs to improve their health or quality of life. Generally, the resistance training oriented muscle hypertrophy has been associated with the use of high workloads (70-85% of 1RM. Currently, it has been proposed that the resistance training with loads of only 20% 1RM under conditions of restricted blood flow can induce increases in strength levels similar to resistance training with high intensities. Because certain groups could benefit from the use of low loads in their strength training programs designed to increase muscle mass, the objective of the present study was to review the literature on the existing evidence about the effectiveness of blood

An analysis of CT findings of mediastinal lymphadenopathy

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Park, Jeong Mi; Im, Jung Gi; Hong, Ju Hee; Han, Man Chung

1988-01-01

CT plays an important role in evaluating mediastinal lymphadenopathy, especially in the staging of lung cancer. However, its role has been confined to the detectability of pathologic lymph nodes by using the size criteria. Still seldom effort has been made on morphologic analysis of the diseased lymph nodes. We analyzed post-enhance CT scans of 64 pathologically proven patients who had mediastinal lymphadenopathy, with special reference to nodal architecture. 24 of the 41 patients with lung cancer and 15 of the 17 patients with tuberculous mediastinal lymphadenitis showed intranodal necrotic low density. Not only tuberculous lymph nodes showed higher incidence but also showed higher conspicuity of the necrotic low density than that of the metastatic nodes from lung cancer. Conspicuity of internal low density in tuberculous nodes was due to significantly higher density of enhanced rim (121.7±18.7 HU) than that of metastatic nodes (91.2±23.4 HU) (P<0.01). As the node size increases incidences of necrotic low density increased both in tuberculous and metastatic nodes, but the latter steeper. Analysis of the location of the diseased node did not show any significant difference between tuberculous and metastatic nodes. If there is coexistence of primary lung mass, the possibility of lung cancer was markedly elevated than that of tuberculosis and the internal low density in lung mass shows some tendency of coexistence of central low density within metastatic lymph nodes.

Prognostic significance of tumor size of small lung adenocarcinomas evaluated with mediastinal window settings on computed tomography.

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Yukinori Sakao

Full Text Available BACKGROUND: We aimed to clarify that the size of the lung adenocarcinoma evaluated using mediastinal window on computed tomography is an important and useful modality for predicting invasiveness, lymph node metastasis and prognosis in small adenocarcinoma. METHODS: We evaluated 176 patients with small lung adenocarcinomas (diameter, 1-3 cm who underwent standard surgical resection. Tumours were examined using computed tomography with thin section conditions (1.25 mm thick on high-resolution computed tomography with tumour dimensions evaluated under two settings: lung window and mediastinal window. We also determined the patient age, gender, preoperative nodal status, tumour size, tumour disappearance ratio, preoperative serum carcinoembryonic antigen levels and pathological status (lymphatic vessel, vascular vessel or pleural invasion. Recurrence-free survival was used for prognosis. RESULTS: Lung window, mediastinal window, tumour disappearance ratio and preoperative nodal status were significant predictive factors for recurrence-free survival in univariate analyses. Areas under the receiver operator curves for recurrence were 0.76, 0.73 and 0.65 for mediastinal window, tumour disappearance ratio and lung window, respectively. Lung window, mediastinal window, tumour disappearance ratio, preoperative serum carcinoembryonic antigen levels and preoperative nodal status were significant predictive factors for lymph node metastasis in univariate analyses; areas under the receiver operator curves were 0.61, 0.76, 0.72 and 0.66, for lung window, mediastinal window, tumour disappearance ratio and preoperative serum carcinoembryonic antigen levels, respectively. Lung window, mediastinal window, tumour disappearance ratio, preoperative serum carcinoembryonic antigen levels and preoperative nodal status were significant factors for lymphatic vessel, vascular vessel or pleural invasion in univariate analyses; areas under the receiver operator curves were 0

Prognostic Significance of Tumor Size of Small Lung Adenocarcinomas Evaluated with Mediastinal Window Settings on Computed Tomography

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Sakao, Yukinori; Kuroda, Hiroaki; Mun, Mingyon; Uehara, Hirofumi; Motoi, Noriko; Ishikawa, Yuichi; Nakagawa, Ken; Okumura, Sakae

2014-01-01

Background We aimed to clarify that the size of the lung adenocarcinoma evaluated using mediastinal window on computed tomography is an important and useful modality for predicting invasiveness, lymph node metastasis and prognosis in small adenocarcinoma. Methods We evaluated 176 patients with small lung adenocarcinomas (diameter, 1–3 cm) who underwent standard surgical resection. Tumours were examined using computed tomography with thin section conditions (1.25 mm thick on high-resolution computed tomography) with tumour dimensions evaluated under two settings: lung window and mediastinal window. We also determined the patient age, gender, preoperative nodal status, tumour size, tumour disappearance ratio, preoperative serum carcinoembryonic antigen levels and pathological status (lymphatic vessel, vascular vessel or pleural invasion). Recurrence-free survival was used for prognosis. Results Lung window, mediastinal window, tumour disappearance ratio and preoperative nodal status were significant predictive factors for recurrence-free survival in univariate analyses. Areas under the receiver operator curves for recurrence were 0.76, 0.73 and 0.65 for mediastinal window, tumour disappearance ratio and lung window, respectively. Lung window, mediastinal window, tumour disappearance ratio, preoperative serum carcinoembryonic antigen levels and preoperative nodal status were significant predictive factors for lymph node metastasis in univariate analyses; areas under the receiver operator curves were 0.61, 0.76, 0.72 and 0.66, for lung window, mediastinal window, tumour disappearance ratio and preoperative serum carcinoembryonic antigen levels, respectively. Lung window, mediastinal window, tumour disappearance ratio, preoperative serum carcinoembryonic antigen levels and preoperative nodal status were significant factors for lymphatic vessel, vascular vessel or pleural invasion in univariate analyses; areas under the receiver operator curves were 0.60, 0.81, 0

A case of mediastinitis secondary to retropharyngeal abscess

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Aparajeet Kar

2015-01-01

Full Text Available A 50 year old male patient who consumed chicken bone soup, 4 days back, presented with dysphagia, high grade fever with chills, shortness of breath and swelling in face, neck and upper chest. Patient was toxic and in respiratory distress with room air oxygen saturation of 83%, which increased to 92% with 6 lit of oxygen through simple face mask. Indirect laryngoscopy revealed a retro pharyngeal abscess and CT chest revealed Sub-cutaneous and mediastinal emphysema. The abscess was immediately drained and followed with parenteral anti-microbials and high flow oxygen theapy. Patient improved and was discharged after 12 days. This case was reported as, foreign body causing Retro-pharyngeal abscess is a very rare entity in this anti-biotic era especially leading to a very rare complication of mediastinitis and Pneumomediastinum is unusual.

Improving CT-guided transthoracic biopsy of mediastinal lesions by diffusion-weighted magnetic resonance imaging

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Guimaraes, Marcos Duarte; TyngI, Chiang Cheng; Bitencourt, Almir Galvao Vieira; Gross, Jefferson Luiz; Zurstrassen, Charles Edouard, E-mail: marcosduarte500@gmail.com [AC Camargo Cancer Center, Sao Paulo, SP (Brazil); Hochhegger, Bruno [Universidade Federal de Ciencias da Saude de Porto Alegre (UFCSPA), RS (Brazil). Dept. de Radiologia; Benveniste, Marcelo Felipe Kuperman; Odisio, Bruno Calazans [University of Texas, MD Anderson Cancer Center, Houston, TX (United States); Marchiori, Edson [Universidade Federal do Rio de Janeiro (UFRJ), Petropolis, RJ (Brazil)

2014-11-15

Objectives: to evaluate the preliminary results obtained using diffusion-weighted magnetic resonance imaging and the apparent diffusion coefficient for planning computed tomography-guided biopsies of selected mediastinal lesions. Methods: eight patients with mediastinal lesions suspicious for malignancy were referred for computed tomography-guided biopsy. Diffusion-weighted magnetic resonance imaging and apparent diffusion coefficient measurement were performed to assist in biopsy planning with diffusion/computed tomography fused images. We selected mediastinal lesions that could provide discordant diagnoses depending on the biopsy site, including large heterogeneous masses, lesions associated with lung atelectasis or consolidation, lesions involving large mediastinal vessels and lesions for which the results of biopsy using other methods and histopathological examination were divergent from the clinical and radiological suspicion. Results: in all cases, the biopsy needle was successfully directed to areas of higher signal intensity on diffusion weighted sequences and the lowest apparent diffusion coefficient within the lesion (mean, 0.8 [range, 0.6–1.1]610{sup -3} mm{sup 2}/s), suggesting high cellularity. All biopsies provided adequate material for specific histopathological diagnoses of four lymphomas, two sarcomas and two thymoma s. Conclusion: functional imaging tools, such as diffusion-weighted imaging and the apparent diffusion coefficient, are promising for implementation in noninvasive and imaging-guided procedures. However, additional studies are needed to confirm that mediastinal biopsy can be improved with these techniques. (author)

Relación del autoconcepto con la condición física y la composición corporal en una muestra de adolescentes

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Rafael E. Reigal-Garrido

2014-10-01

Full Text Available El propósito de este trabajo es examinar las relaciones entre el autoconcepto y diferentes variables de la condición física, así como el porcentaje de masa grasa. Han participado en el estudio 283 adolescentes de la ciudad de Málaga (España, en edades comprendidas entre los 14 y 16 años (M = 15.14; DT = .76. Se ha utilizado el Cuestionario Autoconcepto Forma 5 (AF5 para evaluar el autoconcepto multidimensional (académico, social, emocional, familiar y físico. Se ha medido el porcentaje de masa grasa corporal usando un instrumento de bioimpedancia eléctrica y el consumo máximo de oxígeno a través del test de Course Navette. Además, se ha estimado el tiempo en recorrer 50 metros lisos, la distancia alcanzada mediante salto horizontal y la amplitud de movimiento con la prueba flexión profunda de tronco. Los análisis de correlación y regresión lineal efectuados ponen de manifiesto la conexión entre las variables objeto de estudio, siendo el porcentaje de masa grasa y el consumo de oxígeno máximo aquellas que mejor se han relacionado con el autoconcepto. Además, las dimensiones física y emocional son las que han sido predichas con un mayor porcentaje de la varianza explicada.

Systematic mediastinal lymphadenectomy or mediastinal lymph node sampling in patients with pathological stage I NSCLC: a meta-analysis.

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Dong, Siyuan; Du, Jiang; Li, Wenya; Zhang, Shuguang; Zhong, Xinwen; Zhang, Lin

2015-02-01

To evaluate the evidence comparing systematic mediastinal lymphadenectomy (SML) and mediastinal lymph node sampling (MLS) in the treatment of pathological stage I NSCLC using meta-analytical techniques. A literature search was undertaken until January 2014 to identify the comparative studies evaluating 1-, 3-, and 5-year survival rates. The pooled odds ratios (OR) and the 95 % confidence intervals (95 % CI) were calculated with either the fixed or random effect models. One RCT study and four retrospective studies were included in our meta-analysis. These studies included a total of 711 patients: 317 treated with SML, and 394 treated with MLS. The SML and the MLS did not demonstrate a significant difference in the 1-year survival rate. There were significant statistical differences between the 3-year (P = 0.03) and 5-year survival rates (P = 0.004), which favored SML. This meta-analysis suggests that in pathological stage I NSCLC, the MLS can get the similar outcome to the SML in terms of 1-year survival rate. However, the SML is superior to MLS in terms of 3- and 5-year survival rates.

Ectopic pancreas in a giant mediastinal cyst

NARCIS (Netherlands)

Li, Wilson W.; van Boven, Wim Jan; Jurhill, Roy R.; Bonta, Peter I.; Annema, Jouke T.; de Mol, Bas A.

2016-01-01

Ectopic pancreas located in the mediastium is an extremely rare anomaly. We present a case of an ectopic pancreas located in a giant mediastinal cyst in an 18-year-old man. He presented with symptoms of dyspnea due to external compression of the cyst on the left main bronchus. Complete surgical

Mediastinal neoplasms in patients with Graves disease: a possible link between sustained hyperthyroidism and thymic neoplasia?

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Boyd Jonathan D

2012-07-01

Full Text Available Abstract Background Anterior mediastinal masses are a rare but well documented finding in Graves disease. The vast majority of these lesions represents benign thymic hypertrophy and regress after treatment of the hyperthyroidism. A small percentage of these cases however represent neoplastic/malignant diseases which require further treatment. Cases 12 year old boy with one year history of refractory Graves disease was found to have an anterior mediastinal mass and underwent curative thyroidectomy for sustained hyperthyroidism. Cervical lymphadenopathy was detected during the procedure and biopsy was obtained. A 23 year old woman who presented with a one month history of hyperthyroid symptoms, was diagnosed with Graves disease and also was found to have an anterior mediastinal mass on imaging. Biopsy of the anterior mediastinal mass was obtained and subsequently the patient underwent robotic thymectomy. Histologic examination and immunophenotyping of the cervical lymph node in a 12 year old boy revealed neoplastic proliferation of T lymphoblasts diagnostic of T lymphoblastic leukemia/lymphoma. Examination of the anterior mediastinal mass biopsy in the 23 year old woman revealed type B1 thymoma which was confirmed after examination of the subsequent robotic thymectomy specimen. Conclusion This is the first reported case of T cell lymphoblastic lymphoma and the third reported case of thymoma associated with sustained hyperthyroidism due to Graves disease. These cases indicate that an anterior mediastinal mass in a patient with active Graves disease may be due to a neoplastic cause, which may require definitive treatment. Caution should be exercised when dismissing a mediastinal mass as benign thymic hyperplasia in patients with active Graves disease.

Surgical Management of Bulky Mediastinal Metastases in Follicular Thyroid Carcinoma

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Zainal Adwin

2016-01-01

Full Text Available Follicular thyroid adenoma and carcinoma are very common. Benign and malignant lesions are usually indistinguishable from cytology alone and often require confirmatory resection. The spread of follicular carcinoma is usually hematogenous and is treated with surgery and adjuvant radioactive iodine. Very rarely, metastases occur in the mediastinum. Patients usually present with severe compressive symptoms. With proper treatment and follow-up, the prognosis for these type of thyroid malignancies is excellent. In the case presented here, our patient presented to the Universiti Kebangsaan Malaysia Medical Center with a progressively enlarging anterior neck swelling. The swelling had started 10 years before his presentation. We diagnosed him with an advanced thyroid malignancy with bulky mediastinal metastases. After extensive investigations and counseling, we chose to treat the patient with tumor excision and mediastinal metastases resection. Typically, mediastinal resection involves the removal of the sternum and use of an acrylic implant to recreate the sternum. In this case, the sternum and ribs were removed with subsequent myocutaneous flap coverage for the wound defect. Our experience represents an alternative treatment option in cases where implant use is unsuitable.

Rare post-operative complications of large mediastinal tumor resection

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Mohsen Mirmohammadsadeghi

2015-03-01

Full Text Available Background: There are some reports in the literature, which suggest that cardiac tamponade drainage may transiently affect systolic function and also cause acute respiratory distress syndrome (ARDS. We did not find any reports of acute ventricular failure and ARDS secondary to mediastinal tumor resection without tamponade. Case Report: Here we report a 48-year-old woman presenting with massive pericardial effusion without tamponade in whom tumor was resected through median sternotomy using cardiopulmonary bypass. ARDS and acute heart failure were two rare complications that happened at the end of the operation secondary to a sudden decompression of the heart from tumor pressure. Conclusion: ARDS and acute heart failure are two rare complications, which can happen after large mediastinal tumor resection.

PENGARUH PENAMBAHAN KALIUM PADA MASA ADAPTASI PENURUNAN SALINITAS TERHADAP PERFORMA PASCALARVA UDANG VANAMEI (Litopenaeus vannamei)

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Ferdinand Hukama Taqwa; Daniel Djokosetiyanto; Ridwan Affandi

2008-01-01

Tujuan penelitian ini adalah untuk mengetahui pengaruh penambahan kalium selama masa adaptasi penurunan salinitas terhadap performa pascalarva udang vanamei. Penelitian ini dilaksanakan untuk mendapatkan kadar kalium optimal yang dapat menurunkan tingkat stres dan meningkatkan sintasan pascalarva udang vanamei setelah melalui masa adaptasi penurunan salinitas. Hewan uji yang digunakan adalah PL20 udang vanamei. Rancangan percobaan menggunakan rancangan acak lengkap dengan perlakuan yang diter...

Física de Partículas y el Origen de la Masa Física de Partículas y el Origen de la Masa

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Carlos Alberto Vaquera Araujo

2012-02-01

Full Text Available Se presenta una breve introducción al problema del origen de la masa desde la perspectiva de la física moderna de partículas. También se presenta una discusión elemental acerca del modelo estándar de las partículas y sus interacciones, todo esto incluyendo un esbozo del mecanismo de Higgs, que en este modelo es responsable de la generación de las masas de las partículas fundamentales.A brief introduction is given to the problem of the origin of mass from the perspective of modern particle physics. Also an elementary discussion about the standard model of particles and their interactions is presented, together with a sketch of the Higgs mechanism, which in this model is responsible for the generation of the masses of the fundamental particles.

Relación de glutatión reducido/oxidado (GSH/GSSG en ratas diabéticas tratadas con maca (Lepidium meyenii walp

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Ruth Cisneros

2011-04-01

Full Text Available Introducción: La diabetes mellitus y sus complicaciones representan un problema de salud pública. La hiperglucemia desencadena efectos bioquímicos dañinos para el organismo, como el estrés oxidativo y el proceso inflamatorio crónico, por lo que el uso de plantas medicinales con elevada capacidad antioxidante, como Lepidium meyenii Walp (maca, es una alternativa en el tratamiento de esta patología. Objetivo: Determinar si la ingestión de harina de maca mejora la relación glutatión reducido/oxidado (GSH/GSSG en ratas diabéticas. Diseño: Experimental. Institución: Centro de Investigación de Bioquímica y Nutrición, Facultad de Medicina, UNMSM, Lima, Perú. Material biológico: Harina de maca amarilla y ratas albinas Holtzman machos adultas. Intervenciones: Se utilizó 24 ratas, a los cuales se les indujo la diabetes con estreptozotocina (STZ 40 mg/kg de masa corporal y que fueron distribuidas aleatoriamente en cuatro grupos, de seis animales cada uno: control (CO, glibenclamida (GL 10 mg/kg de masa corporal, maca 4 g/día (M4 y maca 6 g/día (M6; el experimento duró 40 días. Se evaluó la glicemia, masa corporal y, al final del experimento, se determinó los niveles de GSH y GSSG en plasma y homogenizado de hígado. Principales medidas de resultados: Masa corporal, glicemia, GSH y GSSG en plasma y homogenizado de hígado. Resultados: A nivel plasmático, el glutatión circulante estuvo favorecido para la forma reducida. Los valores de la relación GSH/GSSG en los grupos tratados con maca estuvieron alrededor de 190, significativamente mayor al grupo CO. Conclusiones: La administración de harina de maca amarilla a ratas diabéticas incrementó la relación GSH/GSSG a nivel plasmático, contribuyendo a mejorar su estado redox.

Reporte de un caso de coexistencia de feocromocitoma y adenoma cortical adrenal en un paciente con hipertensión severa

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Restrepo, César A.; Etayo, Edwin

2012-01-01

Se reporta el caso de una paciente con hipertensión paroxística asociada a síntomas adrenérgicos, en quien se encontraron niveles elevados de metanefrinas totales en orina de 24 horas, hipopotasemia persistente y nódulo en la glándula suprarrenal. Fue llevada a cirugía en la que se identificaron dos masas suprarrenales, una con características histológicas de feocromocitoma y otra de adenoma suprarrenal.

PREDICCION DE LA ALTURA DE SALTO VERTICAL. IMPORTANCIA DEL IMPULSO MECÁNICO Y DE LA MASA MUSCULAR DE LAS EXTREMIDADES INFERIORES

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C. Ferragut

2010-09-01

Full Text Available

RESUMEN

El objetivo de este estudio ha sido determinar si es posible predecir la altura de vuelo en el salto vertical a partir de variables cinemáticas, dinamométricas y antropométricas, mediante un modelo de regresión múltiple lineal. Participaron en el estudio 53 sujetos, 21 hombres jugadores de voleibol de categorías nacionales (División de Honor y Primera División y 9 mujeres jugadoras de voleibol de División de Honor, así como 23 estudiantes de Educación Física, de los cuales 12 eran hombres y 11 mujeres. Inicialmente se determinó la altura de vuelo en saltos efectuados sin contramovimiento o "squat jumps" (SJ y en saltos precedidos por un contramovimiento o "countermovement jumps" (CMJ. Además, se determinó la fuerza isométrica máxima (FIM en posición de semisentadillla, con las rodillas flexionadas a 90º, 120º y 140º , simultáneamente se tomaron medidas de la actividad electromiográfica del vasto externo del cuádriceps. La masa muscular de las extremidades inferiores se midió mediante absociometría fotónica dual de rayos X (DEXA. El impulso positivo explicó por sí solo un 77% de la variabilidad en altura de vuelo. La variable anterior combinada con el porcentaje de masa corporal representado por la masa muscular de las extremidades inferiores permitió explicar un 82% de la variabilidad de la altura de vuelo en el CMJ. Al añadir a la ecuación anterior la masa muscular de las extremidades inferiores se pudo explicar un 98% de la variabilidad en altura de vuelo. En los saltos sin contramovimiento, también fue posible explicar un porcentaje similar de la variabilidad de la altura de vuelo utilizando las mismas variables.
PALABRAS CLAVE: Salto vertical, DEXA, masa muscular, fuerza

ABSTRACT

Individualización cinética de reacciones simultáneas por espectrometría de masa: descomposición térmica de los carbonatos básicos de níquel y de cobalto

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Antonio Jerez-Mendez

2001-03-01

Full Text Available El análisis térmico por espectrometría de masa resuelve problemas experimentales que presenta el análisis térmico convencional al aire, en el cual es imposible detectar las reacciones que tienen lugar simultáneamente en un mismo intervalo de temperatura y, por lo tanto, resulta imposible individualizarlas a partir de la pérdida de masa por análisis termogravimétrico (AT o por el efecto (endotérmico o exotérmico, según el caso registrado por análisis térmico diferencial (ATD debido al solapamiento de los procesos en dichas curvas. El análisis térmico mediante espectrometría de masa permitió individualizar la cinética de la descomposición térmica de los carbonatos básicos de níquel y de cobalto. Estos resultados se comparan con los obtenidos en la descomposición térmica del carbonato de calcio, donde existe la evolución de un único producto gaseoso. Los resultados demuestran que en la descomposición térmica de los carbonatos básicos de níquel y de cobalto, la salida del agua de constitución y del dióxido de carbono no son procesos sucesivos. Parte del agua de constitución abandona la muestra simultáneamente con el dióxido de carbono, aunque en los termogramas estas transformaciones sólo se visualizan como efectos que se solapan

[Streptococcal mediastinitis after thyroidectomy. A literature review].

Science.gov (United States)

Bures, C; Zielinski, V; Klatte, T; Swietek, N; Kober, F; Tatzgern, E; Bobak-Wieser, R; Gschwandtner, E; Gilhofer, M; Wechsler-Fördös, A; Hermann, M

2015-12-01

Surgical site infections after thyroid surgery are mostly superficial and can be well treated. Streptococcal mediastinitis in contrast is a rare but life-threatening complication. A 57-year-old female patient experienced septic fever, increase of inflammation parameters and erythema 2 days after thyroid surgery for Graves' disease. This process was triggered by a three-compartment infection by group A Streptococcus (GAS) with involvement of the mediastinum. Therapy over 6 weeks including seven wound revisions with the patient under general anesthesia, pathogen-adapted antibiotic treatment and cervical negative pressure treatment managed to control the infection. A total of 21 cases have been published on this phenomenon, 11 of which had a fatal outcome. High fever and surgical site erythema in the early postoperative period after thyroid surgery can be signs of a GAS infection, which might lead to necrotizing, descending, life-threatening mediastinitis. Early diagnosis with support of computed tomography (CT) scans, immediate therapy including wound opening, lavage, intravenous antibiotic treatment with penicillin and clindamycin are vital. If treatment resistance occurs, cervical negative pressure treatment should be considered.

Pericardial effusion presenting as an anterior mediastinal mass

International Nuclear Information System (INIS)

Schlesinger, A.E.; Fernbach, S.K.; Northwestern Univ., Chicago, IL

1986-01-01

The authors present a case of pericardial effusion in a patient with previous cardiac surgery. Because the pericardium is opened and not reclosed during surgery, fluid can extend superior to the normal upper reflections of the pericardium and simulate an anterior mediastinal mass. (orig.)

CT findings of the mediastinal tumors -excluding mediastinal granuloma and primary carcinoma-

International Nuclear Information System (INIS)

Lee, Kyung Soo; Im, Chung Kie; Han, Man Chung

1985-01-01

Computerized Tomography can make accurate diagnosis in most of the mediastinal tumors and cysts by assessing their location, shape and internal architecture. Authors analysed and present CT findings of 89 surgically proven mediastinal tumors and cysts that were studied and treated in Seoul National University Hospital during recent 5 years. The results are as follows; 1. The most common tumor was teratoma (25 cases). Neurogenic tumor (20 cases), thymic tumor or cyst (16 cases), lymphoma (7 cases), bronchogenic cyst (6 cases), intrathoracic goiter (6 cases), pericardial cyst (3 cases) and cystic hygroma (2 cases) were next in order of frequency. 2. The most constant findings of teratoma was thick walled cystic area (100%), while pathognomonic fat and calcified density were seen only in 52% and 48% of cases, respectively. 22 cases were located in anterior mediastinum, 2 cases were in posterior mediastinum and a case is in middle mediastinum. 3. There were 20 cases of neurogenic tumor consisting of 6 neurilemmomas, 7 ganglioneuromas, 4 neurofibromas, 1 ganglioneuroblastoma, 1 neuroblastoma and 1 malignant schwannoma. Most of them were located in posterior mediastinum with exception of 2 neurilemmomas arising from left vagus nerve and left recurrent laryngeal nerve in middle mediastinum. Cystic change was seen in 2 cases of neurilemmoma and in a case of ganglioneuroma. Calcification was seen in 3 cases, of neuroblastoma, a neurilemmoma, and a ganglioneuroma. 4. There were 11 cases of thymoma showing homogeneous solid mass with speckeld calcification in 4 cases and irregular cystic change in 3 cases. 2 cases were invasive thymoma and myasthenia gravis was present in 4 cases. A cases of thymolipoma and a case of thymic cyst were included. 5. Lymphoma (2 Hodgkin's and 4 non-Hodgkin's) appeared as lobulated, matted mass in anterior mediastinum especially in prevascular area expanding bilaterally

CT findings of the mediastinal tumors -excluding mediastinal granuloma and primary carcinoma-

Energy Technology Data Exchange (ETDEWEB)

Lee, Kyung Soo; Im, Chung Kie; Han, Man Chung [College of Medicine, Seoul National University, Seoul (Korea, Republic of)

1985-06-15

Computerized Tomography can make accurate diagnosis in most of the mediastinal tumors and cysts by assessing their location, shape and internal architecture. Authors analysed and present CT findings of 89 surgically proven mediastinal tumors and cysts that were studied and treated in Seoul National University Hospital during recent 5 years. The results are as follows; 1. The most common tumor was teratoma (25 cases). Neurogenic tumor (20 cases), thymic tumor or cyst (16 cases), lymphoma (7 cases), bronchogenic cyst (6 cases), intrathoracic goiter (6 cases), pericardial cyst (3 cases) and cystic hygroma (2 cases) were next in order of frequency. 2. The most constant findings of teratoma was thick walled cystic area (100%), while pathognomonic fat and calcified density were seen only in 52% and 48% of cases, respectively. 22 cases were located in anterior mediastinum, 2 cases were in posterior mediastinum and a case is in middle mediastinum. 3. There were 20 cases of neurogenic tumor consisting of 6 neurilemmomas, 7 ganglioneuromas, 4 neurofibromas, 1 ganglioneuroblastoma, 1 neuroblastoma and 1 malignant schwannoma. Most of them were located in posterior mediastinum with exception of 2 neurilemmomas arising from left vagus nerve and left recurrent laryngeal nerve in middle mediastinum. Cystic change was seen in 2 cases of neurilemmoma and in a case of ganglioneuroma. Calcification was seen in 3 cases, of neuroblastoma, a neurilemmoma, and a ganglioneuroma. 4. There were 11 cases of thymoma showing homogeneous solid mass with speckeld calcification in 4 cases and irregular cystic change in 3 cases. 2 cases were invasive thymoma and myasthenia gravis was present in 4 cases. A cases of thymolipoma and a case of thymic cyst were included. 5. Lymphoma (2 Hodgkin's and 4 non-Hodgkin's) appeared as lobulated, matted mass in anterior mediastinum especially in prevascular area expanding bilaterally.

Exposición a Bisfenol A (BPA en mujeres embarazadas y su relación con la obesidad en sus hijos: revisión sistemática

Directory of Open Access Journals (Sweden)

Carlos Alberto Gómez-Mercado

2018-01-01

Full Text Available Introducción: El bisfenol A (BPA es un contaminante químico no persistente que altera el funcionamiento normal del sistema endocrino. Se sugiere que la exposición prenatal se asocia con la obesidad en la descendencia. Objetivo: Revisar la literatura sobre la exposición al BPA en mujeres embarazadas y su relación con la obesidad en sus hijos. Metodología: Revisión sistemática de acuerdo a la guía PRISMA. Se realizaron búsquedas en las bases de datos Pubmed, ScienceDirect, Clinical Key, Medline, Ebsco y Scielo y el motor de búsqueda Google Scholar hasta el 30 de Abril de 2017 por dos investigadores independientes que utilizaron los mismos términos de búsqueda. Se incluyeron estudios prospectivos de cohorte realizados que midieron el BPA en la orina materna. Resultados: Se incluyeron 5 estudios con tamaños de muestra entre 297 y 757 binomios madre e hijo, se encontró asociación positiva entre la exposición prenatal a BPA con la circunferencia de cintura en niños de cuatro años β: 0.28 (IC95%:0.01 a 0.57 y el índice de masa grasa β: 0.31 (IC95%: 0.01 a 0.60 en dos de los estudios. Se observaron asociaciones positivas y/o negativas no significativas con índice de masa corporal y su puntaje Z, porcentaje de grasa, sobrepeso/obesidad, peso y talla al nacer, porcentaje de masa grasa. Conclusión: Los resultados de estudios epidemiológicos de cohorte, limita las afirmaciones sobre un vínculo causal entre la exposición prenatal BPA y la obesidad postnatal.

Preoperative Localization of Mediastinal Parathyroid Adenoma with Intra-arterial Methylene Blue

Energy Technology Data Exchange (ETDEWEB)

Salman, Rida; Sebaaly, Mikhael G. [American University of Beirut Medical Center, Department of Diagnostic Radiology (Lebanon); Wehbe, Mohammad Rachad; Sfeir, Pierre; Khalife, Mohamad [American University of Beirut Medical Center, Department of General Surgery (Lebanon); Al-Kutoubi, Aghiad, E-mail: mk00@aub.edu.lb [American University of Beirut Medical Center, Department of Diagnostic Radiology (Lebanon)

2017-06-15

Ectopic parathyroid is found in 16% of patients with hyperparathyroidism. 2% of ectopic parathyroid adenomas are not accessible to standard cervical excision. In such cases, video-assisted thoracoscopic resection is the recommended definitive treatment. We present a case of mediastinal parathyroid adenoma localized preoperatively by injecting methylene blue within a branch of the internal mammary artery that is supplying the adenoma. Intra-arterial methylene blue injection facilitated visualization and resection of the adenoma. The preoperative intra-arterial infusion of methylene blue appears to be an effective and safe method for localization of ectopic mediastinal parathyroid adenomas and allows rapid identification during thoracoscopic resection.

SOCIOLOGIA DE LA CULTURA DE MASAS

OpenAIRE

Blanca Muñoz

2014-01-01

Diversas son las perspectivas teóricas en el análisis de los fenómenos de Masas. Desde la Escuela de Frankfurt, el Neomarxismo hasta el Estructuralismo pasando por la investigación norteamericana, los contenidos y efectos “mass-mediáticos” centran las interpretaciones sobre la evolución de las sociedades de tecnologías avanzada. La repetición simbólica continuada de los ‘medios’ está dando lugar a unos modelos de aculturación que legitiman unas orientaciones tecnocráticas que van, paulatiname...

Obesidad en escolares de comunidades rurales con alta migración internacional en el México Central

OpenAIRE

Maricela Carmona González

2009-01-01

El objetivo fue determinar la prevalencia obesidad en niños y niñas escolares de 6-12 años de los hogares rurales, en localidades con tradición migratoria internacional de la región sur del Estado de México. Así mismo se describen las transformaciones en sus hábitos alimentarios y estilos de vida. Para determinar la prevalencia se obtuvo el Índice de Masa Corporal (IMC) de 276 escolares de tres comunidades, divididos en 2 grupos: escolares con padre migrante y sin padre migrante, subdivididos...

Endoscopic ultrasound-guided fine-needle aspiration cytology in the evaluation of suspected tuberculosis in patients with isolated mediastinal lymphadenopathy

DEFF Research Database (Denmark)

Puri, R.; Vilmann, P.; Sud, R.

2010-01-01

Patients with suspected tuberculosis without pulmonary lesions and with mediastinal lymphadenopathy often pose a diagnostic challenge. Endoscopic ultrasound (EUS)-guided fine-needle aspiration (FNA) cytology is an established modality to evaluate mediastinal and abdominal lesions. The aim...... of the present study was to evaluate the role of EUS-FNA in isolated mediastinal lymphadenopathy in patients suspected of having tuberculosis....

Beneficios de la suplementación con L-carnitina en pacientes pediátricos hemodializados. Reporte de casos

Directory of Open Access Journals (Sweden)

JA Martínez-Morales

2016-09-01

Full Text Available INTRODUCCIÓN: la mayoría de los pacientes pediátricos con insuficiente renal crónica desarrollan desnutrición y anemia. Para tratar esta última se administra eritropoyetina como tratamiento de elección, pero no se logra recuperar la situación nutricional del paciente, por lo que la L-carnitina es una alternativa que mejora el estado nutricional y, al mismo tiempo, disminuye la frecuencia de anemia. OBJETIVO: mejorar los parámetros bioquímicos y antropométricos después de la suplementación con L carnitina en pacientes pediátricos.  MATERIAL Y MÉTODOS: se realizó un estudio analítico y longitudinal, de una serie de casos en 25 participantes, ambos sexos, de 3 a 16 años de edad, con insuficiencia renal crónica y en tratamiento de hemodiálisis. Se les suministró L-carnitina por vía intravenosa (50 mg/ kg/sesión 30 minutos antes de terminar las sesiones de hemodiálisis, durante tres meses (36 sesiones. Antes y después de la maniobra se compararon algunos indicadores bioquímicos (hemoglobina, albumina, colesterol, triglicéridos, creatinina y antropométricos. Se realizó una comparación con T de Student y por proporciones (casos que mejoraron después de maniobra y la reducción del riesgo absoluto. RESULTADOS: la edad promedio de los casos fue 12.4 años (rango de 3 a 16 años. Al comparar los casos con T de Student se obtuvo una mejora significativa con la suplementación para el peso seco (p=0.004; índice de masa corporal (p=0.04; albúmina (p=0.02 y colesterol (p=0.003. Con el cálculo por proporciones de los casos que mejoraron con la maniobra se observó la reducción del riesgo atribuible en un rango de 12 a 68% de todas las variables de interés (hemoglobina, albúmina, colesterol, triglicéridos, peso seco e índice de masa corporal. CONCLUSIONES: la suplementación con L-carnitina intravenosa (50 mg/kg/sesión 30 minutos antes de terminar cada sesión de hemodiálisis, durante tres meses

Reporte de un caso de coexistencia de feocromocitoma y adenoma cortical adrenal en un paciente con hipertensión severa

Directory of Open Access Journals (Sweden)

César A. Restrepo, MD

2012-05-01

Full Text Available Se reporta el caso de una paciente con hipertensión paroxística asociada a síntomas adrenérgicos, en quien se encontraron niveles elevados de metanefrinas totales en orina de 24 horas, hipopotasemia persistente y nódulo en la glándula suprarrenal. Fue llevada a cirugía en la que se identificaron dos masas suprarrenales, una con características histológicas de feocromocitoma y otra de adenoma suprarrenal.

Densidad mineral ósea y adecuación de la dieta en pacientes con enfermedad renal crónica en hemodiálisis

OpenAIRE

Fernando Carrasco; Marcelo Cano; Jean Camousseigt; Pamela Rojas; Jorge Inostroza; Rubén Torres

2013-01-01

Introducción: La desnutrición es común en la enfermedad renal crónica (ERC), junto a una menor masa muscular y densidad mineral ósea (DMO), aumentando el riesgo de morbilidad. Objetivo: Comparar la composición corporal (CC), DMO y el contenido mineral óseo (CMO) entre pacientes con ERC y sujetos sanos, relacionándolos con ingesta energética, de macro y micronutrientes. Métodos: Se evaluó CC en 30 pacientes en hemodiálisis y 28 voluntarios sanos con DEXA. Los pacientes llenaron tres registros ...

Pseudomonas species as an uncommon culprit in transbronchial needle aspiration of mediastinal lymph node

Directory of Open Access Journals (Sweden)

Avdhesh Bansal

2016-01-01

Full Text Available Mediastinal lymphadenopathy due to various infective agents such as Mycobacterium and fungus, due to sarcoidosis, lymphoma, and metastasis is often seen. Ordinary bacteria have rarely been reported to cause necrotizing, usually suppurative granulomatous reactions. We report a case of mediastinal lymphadenopathy due to Pseudomonas infection, in a patient of chronic kidney disease on maintenance hemodialysis, who presented with fever, breathlessness, and low blood pressure.

Evolución de estrellas enanas blancas de Helio de masa baja e intermedia

Science.gov (United States)

Althaus, L. G.; Benvenuto, O. G.

Numerosas observaciones realizadas particularmente en los últimos dos años parecen confirmar que las enanas blancas (EB) de helio de masa baja e intermedia son el resultado de la evolución de sistemas binarios cercanos. Con el objeto de realizar una adecuada interpretación de estos objetos son necesarios modelos de EBs de helio lo más detallado posibles. En este estudio presentamos cálculos detallados de la evolución de EBs de helio con masas entre M=0.1Msolar y M=0.5Msolar a intervalos de 0.05Msolar . Para ello, hemos tenido en cuenta los efectos de temperatura finita mediante un código de evolución estelar lo más actualizado posible. En particular, el transporte de energía es descripto en el marco del nuevo modelo para la convección turbulenta desarrollado por Canuto - Mazzitelli. Además hemos considerado la nueva ecuación de estado para plasmas de helio de Saumon et al. y nuevas opacidades radiativas OPAL. Las pérdidas por neutrinos fueron asimismo tenidas en cuenta. Excepto para las EBs más masivas, nuestros modelos iniciales están ubicados en las cercanías de la correspondiente línea de Hayashi para configuraciones de helio. Nuestros resultados muestran que existe una región prohibida en el diagrama observacional HR donde ninguna EB de helio puede encontrarse. Dicha región es para log{(L/Lsolar )}>= -0.25 and log{Teff} >= 4.45. Hemos encontrado también que los tracks evolutivos en el diagrama HR en el dominio de alta luminosidad (pre - EB) son fuertemente afectados por la eficiencia convectiva y que las pérdidas por neutrinos son importantes en los modelos más masivos. Finalmente hemos analizado la estructura de la zona convectiva externa encontrando que la teoría de Canuto - Mazzitelli conduce a un perfil convectivo muy diferente del dado por cualquier versión de la popular teoría de la mixing length. Si bién este comportamiento es decisivo en el contexto de las inestabilides pulsacionales, los radios y gravedades superficiales de

Normal mediastinal and hilar lymph nodes in children on multi-detector row chest computed tomography

Energy Technology Data Exchange (ETDEWEB)

Jong, Pim A. de; Nievelstein, Rutger-Jan A. [University Medical Center Utrecht and Wilhelmina Children' s Hospital, Department of Radiology, Utrecht (Netherlands)

2012-02-15

To study normal mediastinal and hilar lymph nodes on multi-detector chest computed tomography (CT). A cohort of 120 children aged 1-17 years underwent emergency CT, including the chest, after high-energy trauma. Axial 5-mm reconstructions were evaluated for lymph nodes at hilar and various mediastinal levels and the short-axis diameters were measured. At least one lymph node was found in 115 (96%) children, with subcarinal (69%), lower paratracheal (64%) and hilar (60%) nodes being most common. Up to 10 years of age most lymph nodes were smaller than or equal to 7 mm. In older children lymph nodes measuring up to 10-mm-short-axis diameter were found. Lymph nodes were rare along the mammary vessels, at lower oesophageal and at prevascular and posterior mediastinal levels in children. Mediastinal and hilar lymph nodes are more common than previously thought, probably because of increased detection by modern multi-detector CT. Lymph node location and age have to be taken into account when evaluating lymph nodes in the paediatric chest. (orig.)

Normal mediastinal and hilar lymph nodes in children on multi-detector row chest computed tomography

International Nuclear Information System (INIS)

Jong, Pim A. de; Nievelstein, Rutger-Jan A.

2012-01-01

To study normal mediastinal and hilar lymph nodes on multi-detector chest computed tomography (CT). A cohort of 120 children aged 1-17 years underwent emergency CT, including the chest, after high-energy trauma. Axial 5-mm reconstructions were evaluated for lymph nodes at hilar and various mediastinal levels and the short-axis diameters were measured. At least one lymph node was found in 115 (96%) children, with subcarinal (69%), lower paratracheal (64%) and hilar (60%) nodes being most common. Up to 10 years of age most lymph nodes were smaller than or equal to 7 mm. In older children lymph nodes measuring up to 10-mm-short-axis diameter were found. Lymph nodes were rare along the mammary vessels, at lower oesophageal and at prevascular and posterior mediastinal levels in children. Mediastinal and hilar lymph nodes are more common than previously thought, probably because of increased detection by modern multi-detector CT. Lymph node location and age have to be taken into account when evaluating lymph nodes in the paediatric chest. (orig.)

Pulmonary Artery Occlusion and Mediastinal Fibrosis in a Patient on Dopamine Agonist Treatment for Hyperprolactinemia

DEFF Research Database (Denmark)

Su, Junjing; Simonsen, Ulf; Carlsen, Jørn

2017-01-01

Unusual forms of pulmonary hypertension include pulmonary hypertension related to mediastinal fibrosis and the use of serotonergic drugs. Here, we describe a patient with diffuse mediastinal fibrosis and pulmonary hypertension while she was on dopamine agonist therapy. A young woman, who...... showed fibrosis and chronic inflammation. Subsequent investigations revealed that diffuse mediastinal fibrosis with concurrent pulmonary hypertension, and not CTEPH, was the most likely diagnosis and cabergoline and bromocriptine may have triggered the fibrotic changes. Both drugs are ergot...... was treated with cabergoline and bromocriptine for hyperprolactinemia, presented with progressive dyspnea over several months. Based on the clinical investigation results, in particular, elevated pulmonary arterial pressures and significant perfusion defects on computed tomography (CT) pulmonary angiography...

Sistema para producir harina nixtamalizada con transporte de bajo cizallamiento

OpenAIRE

Ortega-Moody, Jorge; Morales-Sánchez, Eduardo; Hernández-Román, Miguel Ángel; Ruíz-Torres, Maximiano

2011-01-01

La tortilla es el alimento más consumido en México y se produce a partir de masa obtenida por el proceso tradicional de nixtamalización. Este método tiene dos inconvenientes: el primero es la cantidad de agua contaminada que genera (nejayote); el segundo, son los tiempos perdidos, ya que la producción es por lotes. Como consecuencia, se han desarrollado métodos continuos que se basan principalmente en la extrusión. Mediante la extrusión con calor, el producto se convierte en un fluido pseudop...

Diagnostic ability of mediastinal and hilar lymph node metastasis of primary lung cancer

International Nuclear Information System (INIS)

Hwang, Len-Ming

1985-01-01

Preoperative thoracic CT scan and conventional radiologic procedures were performed in 68 primary lung cancer patients who underwent radical operation for intrathoracic lymph nodes. The subjects of this study consisted of 58 males and 10 females. Histologically, squamous cell carcinoma was noted in 28 patients, adenocarcinoma in 31, large cell cancer in 5 and small cell cancer in 4. According to the pTNM factor N classification, n0 was noted in 28 patients, n1 in 13 and n2 in 27. Plain and contrast enhancement CT scan were performed, using GE-made CT 9800, from apex to diaphragm with a 2-second scan time in supine position during full inspiration. As conventional radiologic procedures, posteroanterior and lateral plain roentgenography and posteroanterior and lateral tomography of the thoracic region including the hilum and mediastinum were performed on all patients, and 55 0 oblique tomography and PAG procedures were added, if necessary. Of 68 patients, 40 had metastatic lesions in the mediastinal and hilar lymph nodes, 37 in the ipsilateral hilar lymph nodes and 27 in the mediastinal lymph nodes. Of 37 patients with metastatic lesions in the ipsilateral hilar lymph nodes, 24 had such lesions in the mediastinal lymph nodes as well, and 13 only in the ipsilateral hilar lymph nodes. Three patients had mediastinal metastasis without ipsilateral hilar metastasis. In detecting mediastinal lymph node metastasis, CT showed a sensitivity of 78 %, a specificity of 73 % and an accuracy of 75 % while conventional radiologic procedures had a sensitivity of 41 %, a specificity of 78 %, and an accuracy of 63 %. In the hilum, CT also had a higher sensitivity (73 %, 62 % respectively) and lower specificity (71 %, 77 % respectively) comparing to conventional radiologic procedures. And CT had an accuracy of 72 % while conventional radiologic procedures showed 69 %. (J.P.N.)

Indicadores de calidad de las harinas de trigo: índice de calidad industrial y su relación con ensayos predictivos

Directory of Open Access Journals (Sweden)

A.E. de la Horra

2012-12-01

Full Text Available El objetivo de este trabajo fue estudiar y evaluar la capacidad de diferentes parámetros para predecir la calidad de las harinas de trigo, analizando las relaciones existentes entre éstos y el índice de calidad industrial (ICI. Se utilizaron siete muestras de harina de trigo provistas por la CEI Barrow. Se determinaron parámetros relacionados con la calidad del grano de trigo, la molienda y la composición de las harinas. Además, se llevaron a cabo ensayos relacionados con el comportamiento de las masas (ensayo farinográfico y alveográfico y se elaboró pan. Se calculó el ICI para cada una de las muestras y se estudió su relación con pruebas de predicción y ensayos de calidad. El ICI mostró correlaciones significativas y positivas con el contenido de macropolímero de glutenina, la extensibilidad alveográfica y el tiempo de desarrollo de la masa. Estas relaciones podrían resultar beneficiosas en la evaluación de la aptitud de las harinas para la elaboración de diferentes productos panificados, ya que constituyen determinaciones más sencillas y no requieren de equipamiento de alta tecnología ni grandes cantidades de muestra.

Primary mediastinal atypical meningioma: Report of a case and literature review

Directory of Open Access Journals (Sweden)

Mogi Akira

2012-01-01

Full Text Available Abstract Meningiomas are common neoplasms arising from the central nervous system meninges. On the other hand, primary ectopic meningiomas are extremely rare and usually limited to the head and neck region or to the paravertebral soft tissues. Their occurrence in the mediastinum is even rarer. Until now, only 4 cases of primary mediastinal meningioma have been reported in the literature searched on Medline. Because of its rarity and intriguing pathogenesis, we report here a case of primary mediastinal meningioma that was treated by surgical resection. The clinical features, treatment, pathological findings, and prognosis are analyzed, and the literature on ectopic meningioma is reviewed.

Lethal fibrosing mediastinitis in a child possibly due to Mycobacterium tuberculosis.

Science.gov (United States)

Goussard, Pierre; Gie, Robert P; Janson, Jacque

2018-04-10

Fibrosing mediastinitis (FM) is a rare benign disease resulting from an excessive fibro-inflammatory reaction in the mediastinum that can compress and occlude mediastinal structures. There is a granulomatous and a diffuse non-granulomatous form of FM. We present a case of granulomatous FM following possible tuberculosis in a young child who presented with severe compression of the airways, pulmonary artery and the superior vena cava (SVC), unresponsive to treatment, resulting in death. Bronchoscopic findings included concentric narrowing and mucosal hyperaemia of the tracheobronchial airways. This case raises awareness of this rare complication and the limited treatment options available. © 2018 Wiley Periodicals, Inc.

Influencia del polimorfismo del receptor de andrógenos en la masa ósea, masa muscular y condición física en niños y niñas

OpenAIRE

Rodríguez García, Lorena

2015-01-01

Programa de doctorado: Actividad Física, Salud y Rendimiento Deportivo Premio Extraordinario de Doctorado. Rama Ciencias Sociales y Jurídicas [ES]Para determinar el efecto de ciertos polimorfismos del gen del receptor de andrógenos sobre la masa muscular y la masa ósea, se estudió una muestra poblacional de 152 niños y 116 niñas sanos y físicamente activos (estudios I y II). La composición corporal se determinó mediante absorciometría fotónica dual de rayos X (DXA) y antropometría. La c...

Surgical treatment for mediastinal abscess induced by endobronchial ultrasound-guided transbronchial needle aspiration: a case report and literature review.

Science.gov (United States)

Yokoyama, Yujiro; Nakagomi, Takahiro; Shikata, Daichi; Higuchi, Rumi; Oyama, Toshio; Goto, Taichiro

2017-07-14

Endobronchial ultrasound-guided transbronchial needle aspiration (EBUS-TBNA) is a useful and less invasive procedure for the definitive diagnosis of mediastinal and hilar lymph nodes. However, infectious complications can occur after EBUS-TBNA, although they are extremely rare. A 66-year-old man with necrotic and swollen lower paratracheal lymph nodes underwent EBUS-TBNA. A mediastinal abscess developed 9 days post-procedure. Surgical drainage and debridement of the abscess were performed along with lymph node biopsy followed by daily washing of the thoracic cavity. Surgical treatment was effective, leading to remission of the abscess. Biopsy revealed that the tumor was squamous cell carcinoma with no radiologically detected cancer elsewhere in the body. Mediastinal lung cancer was thus confirmed. Subsequent chemoradiotherapy led to the remission of the tumor. Mediastinitis after EBUS-TBNA is rare but should be considered, particularly if the target lymph nodes are necrotic. Mediastinitis can lead to serious and rapid deterioration of the patient's condition, for which surgical intervention is the treatment of choice.

Caracterización de las masas de aire en la región subtropical

OpenAIRE

Torres, Carlos J.; Cuevas Agulló, Emilio; Guerra García, Juan Carlos; Carreño Corbella, Virgilio

2001-01-01

Ponencia presentada en: V Simposio Nacional de Predicción, celebrado en 2001 en Madrid. Se ha realizado un estudio de la influencia de la inversión del Alisio y del transporte a larga distancia de masas de aire que afectan a Tenerife. Para caracterizar la inversión del Alisio se utilizó una serie larga de datos de sondeos y para conocer la procedencia de las masas de aire realizamos un análisis estadístico de retrotrayectorias isentrópicas para los mismos años. Los resultados obtenidos re...

Entrenamiento con restricción del flujo sanguíneo e hipertrofia muscular. [Blood flow restriction training and muscle hypertrophy].

OpenAIRE

Carlos Reina-Ramos; Raúl Domínguez

2014-01-01

El entrenamiento de fuerza orientado a aumentar la masa muscular se ha convertido en un objetivo común en programas de entrenamiento tanto en deportistas de alto rendimiento como en personas que realizan programas de actividad física con objetivo de mejorar su salud o calidad de vida. Generalmente, el trabajo de fuerza orientado hacia la hipertrofia muscular se ha asociado con la utilización de altas cargas de trabajo (70-85% de 1 RM). Actualmente, se ha propuesto que el entrenamiento de fuer...

Mediastinitis after oesophagoscopy : a case report : case report

African Journals Online (AJOL)

Marinda

of the mediastinal tissues and pleural cavities through digestive juices and bacteria that give rise to cellulitis and suppuration.3. We here report a case in which .... measures and surgical drainage of the retro-oesophageal space if suppuration has developed. Complete healing of the oesophagus may take as long as two ...

Mediastinal Mature Teratoma Revealed by Empyema

Directory of Open Access Journals (Sweden)

Mohammed Raoufi

2016-01-01

Full Text Available Teratomas are germ cell tumors, manifested with a great variety of clinical features; the most common extragonadal site is the anterior mediastinum. In this case, we report the patient with a large mature mediastinal teratoma with several components of ectodermal and endothermal epithelium. A 24-year-old female patient presented with history of persistent chest pain and progressively aggravating dyspnea for the previous 3 months. A chest X-ray showed a large opacity of the entire left hemithorax. Transcutaneous needle aspiration revealed a purulent fluid. The tube thoracostomy was introduced and the effusion was evacuated. Some weeks later, patient was seen in emergency for persistent cough and lateral chest pain. CT scan revealed a mass of the left hemithorax. The mass showed heterogeneous density, without compressing mediastinum great vessels and left hilar structures. Lipase value was elevated in needle aspiration. The patient underwent a total resection of the mediastinum mass via a left posterolateral thoracotomy. Microscopy revealed a mature teratoma with cystic structures. The patient subsequently made a full recovery. This case provide benign mediastinal teratoma with total atelectasis of left lung and elevated lipase value in needle transcutaneous aspiration; this event is explained by pancreatic component in the cystic tumor. Total removal of the tumor is adequate treatment for this type of teratoma and the prognosis is excellent.

Bilateral Video-Assisted Thoracoscopic Surgery Resection for Multiple Mediastinal Myelolipoma: Report of a Case

OpenAIRE

Nakagawa, Masatoshi; Kohno, Tadasu; Mun, Mingyon; Yoshiya, Tomoharu

2014-01-01

Myelolipoma in the mediastinum is an extremely rare entity. In this report, we present the case of a 79-year-old asymptomatic man who had three bilateral paravertebral mediastinal tumors. The three tumors were resected simultaneously using bilateral three-port video-assisted thoracoscopic surgery (VATS). There has been no evidence of recurrence within four years after the operation. Multiple bilateral mediastinal myelolipomas are extremely rare. There are no reports in the English literature ...

Papel de la vitamina D y su receptor (VDR) en tejido adiposo y su relación con el metabolismo de los hidratos de carbono

OpenAIRE

Muñoz Garach, Araceli

2014-01-01

El déficit de vitamina D es una patología frecuente que se relaciona con el desarrollo de diabetes y con las alteraciones de los sujetos con obesidad. La asociación de estas tres entidades no esta claramente establecida. Objetivos Cuantificar los niveles plasmáticos de vitamina D y la expresión de su receptor VDR en tejido adiposo de sujetos clasificados según su índice de masa corporal (IMC) y su perfil glucémico. Pacientes y métodos Se analizaron 119 sujetos y clasificados según...

Strategi Impression Management Pada Komunikasi Interpersonal Antar Calon Mertua Dan Calon Menantu Dalam Masa Penyesuaian Sebelum Pernikahan

OpenAIRE

Purnamasari, Dian

2013-01-01

Calon mertua dan calon menantu memiliki kepribadian dan karakter yang berbeda, sehingga acapkali mengalami ketidakcocokan, dan melakukan impression management dalam komunikasi interpersonal pada masa penyesuaian sebelum pernikahan. Penelitian ini dilakukan untuk meneliti strategi impression management pada komunikasi interpersonal antar calon mertua dan calon menantu dalam masa penyesuaian sebelum pernikahan yang tinggal dalam satu rumah. Jenis penelitian ini menggunakan pendekatan kualitatif...

Estudio estructural de la unión de ADN rico en adeninas y timinas con la proteína HMGA1a y con fármacos específicos de unión al surco estrecho del ADN

OpenAIRE

Millán Elías, Cinthia Raquel

2013-01-01

Las actividades relacionadas con el ADN como la transcripción, replicación, recombinación y reparación implican cambios en la estructura del ADN y en la organización de la cromatina. Estos cambios estructurales dependen de su interacción con proteínas. Las proteínas HMGA1 (High Mobility Group A1) son miembros de una superfamilia de proteínas de baja masa molecular, se encuentran en el núcleo de las células y modifican la conformación espacial del ADN. Actúan como factores de transcri...

Síndrome metabólico y riesgo cardiovascular en pacientes con diagnóstico de esquizofrenia, trastorno esquizoafectivo y trastorno bipolar

OpenAIRE

Muñoz-Calero Franco, Paloma; Sánchez Sánchez, Blanca; Rodríguez Criado, Natalia; Pinilla Santos, Berta; Bravo Herrero, Sandra; Cruz Fourcade, José Fernando; Martín Aragón, Rubén

2015-01-01

Introducción: los pacientes con patologías mentales graves como la esquizofrenia, el trastorno esquizoafectivo y el trastorno bipolar fallecen de media 20 años antes que la población general. La muerte por problemas cardiovasculares es la primera causa de fallecimiento, a pesar de la introducción de estrategias para el control de dichos factores de riesgo. Objetivos: analizar el porcentaje de pacientes con índice de masa corporal elevado, síndrome metabólico y riesgo cardiovascular diagnostic...

Computed tomography image of the mediastinal and axillary lymph nodes in clinically sound Rottweilers

Directory of Open Access Journals (Sweden)

Ana Carolina B. Fonseca Pinto

2013-03-01

Full Text Available Trough computed tomography (CT, it is possible to evaluate lymph nodes in detail and to detect changes in these structures earlier than with radiographs and ultrasound. Lack of information in the veterinary literature directed the focus of this report to normal aspects of the axillary and mediastinal lymph nodes of adult dogs on CT imaging. A CT scan of 15 normal adult male and female Rottweilers was done. To define them as clinically sound, anamnesis, physical examination, complete blood count, renal and hepatic biochemistry, ECG, and thoracic radiographs were performed. After the intravenous injection of hydrosoluble ionic iodine contrast medium contiguous 10mm in thickness thoracic transverse images were obtained with an axial scanner. In the obtained images mediastinal and axillary lymph nodes were sought and when found measured in their smallest diameter and their attenuation was compared to musculature. Mean and standard deviation of: age, weight, body length and the smallest diameter of the axillary and mediastinal lymph nodes were determined. Mean and standard deviation of parameters: age 3.87±2.03 years, weight 41.13±5.12, and body length 89.61±2.63cm. Axillary lymph nodes were seen in 60% of the animals, mean of the smallest diameter was 3.58mm with a standard deviation of 2.02 and a minimum value of 1mm and a maximum value of 7mm. From 13 observed lymph nodes 61.53% were hypopodense when compared with musculature, and 30.77% were isodense. Mediastinal lymph nodes were identified in 73.33% of the dogs; mean measure of the smallest diameter was 4.71mm with a standard deviation of 2.61mm and a minimum value of 1mm, and a maximum value of 8mm. From 14 observed lymph nodes 85.71% were isodense when compared with musculature and 14.28% were hypodense. The results show that it is possible to visualize axillary and mediastinal lymph nodes in adult clinically sound Rottweilers with CT using a slice thickness and interval of 10mm. The

Early mediastinal seroma secondary to modified Blalock-Taussig shunts - successful management by percutaneous drainage

International Nuclear Information System (INIS)

Connolly, Bairbre L.; Temple, Michael J.; Chait, Peter G.; Restrepo, Ricardo; Adatia, Ian

2003-01-01

Large symptomatic mediastinal seroma following modified-BT shunts, traditionally required revisional thoracotomy. We describe percutaneous image-guided pigtail catheter drainage in the successful treatment of early mediastinal seroma secondary to PTFE Blalock-Taussig shunt, avoiding thoracotomy. A retrospective review of all relevant clinical and imaging records in five patients was performed. All five presented with intermittent stridor, respiratory distress and/or episodic desaturation within 6 weeks of their surgery. In four of five infants, percutaneous drainage was effective and reoperation was avoided. In one of five, rather than urgent surgical evacuation and BT shunt revision, we were able to perform an elective stage-II bidirectional Glenn SVC-RA anastamosis in a stable infant. There were no complications. Percutaneous image-guided drainage of mediastinal seroma secondary to PTFE-BT shunt is a safe, minimally invasive, and effective treatment. This may avoid BT shunt revision. (orig.)

Prognostic significance of mediastinal {sup 18}F-FDG uptake in PET/CT in advanced ovarian cancer

Energy Technology Data Exchange (ETDEWEB)

Bats, Anne-Sophie; Lecuru, Fabrice [Universite Paris Descartes, Sorbonne Paris Cite, Faculte de Medecine, Paris (France); Hopital Europeen Georges-Pompidou, Assistance Publique-Hopitaux de Paris, Service de Chirurgie Gynecologique et Cancerologique, Paris (France); Universite Paris Descartes, Sorbonne Paris Cite, INSERM UMR-S 747, Paris (France); Hugonnet, Florent; Faraggi, Marc [Universite Paris Descartes, Sorbonne Paris Cite, Faculte de Medecine, Paris (France); Hopital Europeen Georges-Pompidou, Assistance Publique-Hopitaux de Paris, Service de Medecine Nucleaire, Paris (France); Huchon, Cyrille [Universite Paris Descartes, Sorbonne Paris Cite, Faculte de Medecine, Paris (France); Hopital Europeen Georges-Pompidou, Assistance Publique-Hopitaux de Paris, Service de Chirurgie Gynecologique et Cancerologique, Paris (France); Bensaid, Cherazade [Hopital Europeen Georges-Pompidou, Assistance Publique-Hopitaux de Paris, Service de Chirurgie Gynecologique et Cancerologique, Paris (France); Pierquet-Ghazzar, Nadia [Hopital Europeen Georges-Pompidou, Assistance Publique-Hopitaux de Paris, Service de Medecine Nucleaire, Paris (France)

2012-03-15

To evaluate the prognostic significance of increased mediastinal {sup 18}F-FDG uptake in PET/CT for the staging of advanced ovarian cancer. We retrospectively evaluated patients managed for FIGO stage III/IV ovarian cancer between 1 January 2006 and 1 June 2009. Patients were included if they had undergone {sup 18}F-FDG PET/CT and surgery for initial staging. Exclusion criteria were age younger than 18 years, inability to undergo general anaesthesia, recurrent ovarian cancer, and borderline or nonepithelial malignancy. Whole-body PET/CT was performed after intravenous {sup 18}F-FDG injection. The location of abnormal hot spots and {sup 18}F-FDG maximal standard uptake values (SUV{sub max}) were recorded. We compared the complete cytoreduction and survival rates in groups defined based on mediastinal {sup 18}F-FDG uptake and SUV{sub max} values. Kaplan-Meier curves of overall survival and disease-free survival were compared using the log-rank test. Hazard ratios with their 95% confidence intervals were computed. Adjusted hazard ratios were obtained using a multivariate Cox model. We included 53 patients, of whom 17 (32%) had increased mediastinal {sup 18}F-FDG uptake. Complete cytoreduction was achieved in 14 (87.5%) of the 16 patients managed with primary surgery and in 21 (75%) of the 28 patients managed with interval surgery. Complete cytoreduction was achieved significantly more often among patients without increased mediastinal {sup 18}F-FDG uptake (80.6% vs. 35.3%; p = 0.001). Disease-free survival was comparable between the two groups. By univariate analysis, overall mortality was significantly higher among patients with increased mediastinal {sup 18}F-FDG uptake (hazard ratio 5.70, 95% confidence interval 1.74-18.6). The only factor significantly associated with overall survival by multivariate analysis was complete cytoreduction (adjusted hazard ratio 0.24, 95% confidence interval 0.07-0.89). Increased mediastinal {sup 18}F-FDG uptake was common in patients

Efficacy and haemodynamic effects of vacuum-assisted closure for post-sternotomy mediastinitis in children.

Science.gov (United States)

Takahara, Shingo; Sai, Sadahiro; Kagatani, Tomoaki; Konishi, Akinobu

2014-10-01

Post-sternotomy mediastinitis is a significant morbidity with controversial management. Vacuum-assisted closure (VAC) has been used to treat mediastinitis, with many reports documenting its efficacy and feasibility, particularly in adults. However, its use is not prevalent in the paediatric population because of concerns that it may deteriorate haemodynamics. This study aimed to evaluate outcomes and effects of VAC on the haemodynamics of paediatric patients with post-sternotomy mediastinitis. Six patients were treated with VAC between April 2005 and March 2013. We retrospectively investigated their profiles, clinical outcomes and haemodynamic changes, including mean blood pressure (MBP), mean heart rate (MHR), urinary output, amount of diuretics and vasoactive-inotropic score (VIS), before and after VAC initiation. The median age and body weight of patients were 6.4 months and 4.5 kg, respectively. Three patients (50%) had single ventricular physiology. The median VAC duration was 12 days. One patient died of pulmonary venous obstruction after mediastinitis was cured. The average MBPs in every 8-h period were examined, and there were no significant changes (P = 0.773); the average MHRs were examined in the same manner and they decreased significantly after initiation of VAC (P = 0.032). Only 2 patients required vasoactive agents. The VIS did not change in 1 patient and decreased in the other. The mean amount of diuretics administered and urinary output per body weight did not change significantly (P = 0.395 and 0.273, respectively). In conclusion, the haemodynamics of children were not significantly affected by the negative pressure of VAC, indicating that this therapy may be safe and effective for post-sternotomy mediastinitis, even in small children with complex cardiac anomalies. © The Author 2014. Published by Oxford University Press on behalf of the European Association for Cardio-Thoracic Surgery. All rights reserved.

Hilar and mediastinal lymph node metastases from lung cancer

International Nuclear Information System (INIS)

Koganemaru, Michihiko; Fujimoto, Kiminori; Nishimura, Hiroshi; Tabuchi, Akinori; Ohtake, Hisashi; Nishimura, Yutaka

1990-01-01

Sixty-one patients with primary lung cancer, who had CT and MR imaging before surgery, were studied. MR imaging used spin-echo sequences with T1 weighted image and T2 weighted image (C-MRI), and included STIR technique (Stir-MRI). The accuracy of diagnosis of mediastinal lymphadenopathy (regarding 10 mm or larger in short transverse diameter as positive) was 89% by CT, 84% by C-MRI and 89% by Stir-MRI. The accuracy of diagnosis of hilar lymphadenopathy was 42% by CT, 67% by C-MRI, and 75% by Stir-MRI. The accuracy of diagnosis of mediastinal lymph node metastases was 89% by CT, 94% by C-MRI and 96% by Stir-MRI. The accuracy of diagnosis of hilar lymph node metastases was 78% by CT, 87% by C-MRI and 89% by Stir-MRI. The possibility of enhancement of diagnostic accuracy of lymph node metastases from lung cancer was suggested by combining MR imaging including STIR technique, with CT. (author)

Prevalence of enlarged mediastinal lymph nodes in heavy smokers - a comparative study

Energy Technology Data Exchange (ETDEWEB)

Kirchner, Johannes; Lorenz, Vivian-Wilma [Allgemeines Krankenhaus Hagen, Department of Diagnostic and Interventional Radiology, Hagen (Germany); Kirchner, Esther Maria [Staedtisches Klinikum Wedau, Clinic for Medicine, Duisburg (Germany); Goltz, Jan Peter; Kickuth, Ralph [University Hospital of Wuerzburg, Department of Radiology, Wuerzburg (Germany)

2011-08-15

To evaluate the frequency of enlarged hilar or mediastinal lymph nodes in heavy smokers (more than 10 pack years) compared with non- smokers. In a prospective study the CT findings of 88 consecutive patients (44 heavy smokers, 44 non- smokers) were analysed. Exclusion criteria were history of thoracic malignancy, sarcoidosis, occupational dust exposure or clinical evidence of pneumonia. Prevalence, size and site of enlarged lymph nodes were assessed by multidetector computed tomography (MDCT) and correlated with the cigarette consumption and the CT- findings of bronchitis and emphysema. Twenty-three of the 44 heavy smokers (52%) showed enlarged mediastinal lymph nodes. Non- smokers showed enlarged lymph nodes in 9% (4/44). The most common site of enlarged lymph nodes was the regional station 7 according to the ATS mapping (subcarinal). The difference between the frequency of enlarged lymph nodes in heavy smokers and non- smokers was significant (chi- square 19.3, p < 0.0001). Airway wall thickening and emphysema were often associated with an increased number of enlarged nodes. The present study demonstrates that enlarged mediastinal lymph nodes may occur in a rather high percentage of heavy smokers, especially in those with a MDCT finding of severe bronchitis. (orig.)

Prevalence of enlarged mediastinal lymph nodes in heavy smokers - a comparative study

International Nuclear Information System (INIS)

Kirchner, Johannes; Lorenz, Vivian-Wilma; Kirchner, Esther Maria; Goltz, Jan Peter; Kickuth, Ralph

2011-01-01

To evaluate the frequency of enlarged hilar or mediastinal lymph nodes in heavy smokers (more than 10 pack years) compared with non- smokers. In a prospective study the CT findings of 88 consecutive patients (44 heavy smokers, 44 non- smokers) were analysed. Exclusion criteria were history of thoracic malignancy, sarcoidosis, occupational dust exposure or clinical evidence of pneumonia. Prevalence, size and site of enlarged lymph nodes were assessed by multidetector computed tomography (MDCT) and correlated with the cigarette consumption and the CT- findings of bronchitis and emphysema. Twenty-three of the 44 heavy smokers (52%) showed enlarged mediastinal lymph nodes. Non- smokers showed enlarged lymph nodes in 9% (4/44). The most common site of enlarged lymph nodes was the regional station 7 according to the ATS mapping (subcarinal). The difference between the frequency of enlarged lymph nodes in heavy smokers and non- smokers was significant (chi- square 19.3, p < 0.0001). Airway wall thickening and emphysema were often associated with an increased number of enlarged nodes. The present study demonstrates that enlarged mediastinal lymph nodes may occur in a rather high percentage of heavy smokers, especially in those with a MDCT finding of severe bronchitis. (orig.)

Descending Necrotising Mediastinitis: A Case Report Illustrating a Trend in Conservative Management

Directory of Open Access Journals (Sweden)

B. A. P. Jayasekera

2012-01-01

Full Text Available The mortality rate from descending necrotising mediastinitis (DNM has declined since its first description in 1938. The decline in mortality has been attributed to earlier diagnosis by way of contrast-enhanced computed tomographic (CT scanning and aggressive surgical intervention in the form of transthoracic drainage. We describe a case of DNM with involvement of anterior and posterior mediastinum down to the diaphragm, managed by cervicotomy and transverse cervical drainage with placement of corrugated drains and a pleural chest drain, with a delayed mediastinoscopy and mediastinal drain placement. We advocate a conservative approach with limited debridement and emphasis on drainage of infection in line with published case series.

Alterations of the ECG after frationated radiotherapy of the mediastine

International Nuclear Information System (INIS)

Alheit, C.; Alheit, H.D.; Herrmann, T.

1986-01-01

In 72 patients with irradiation of the mediastine the ECGs were examined before, immediately after, and 3-6 months after termination of radiotherapy. In comparison with starting findings 41.7% ECG alterations were found at the end of irradiation and 40.1% in control examinations. Mainly it was the question of alterations in ST-lines, in type of position, in P-waves, and an increase of the heart rate. However, in result of uni- and multivariant variance analyses it could be shown, that extracardiac factors and general reactions of the irradiated organism resulted in ECG alterations too. Considering the correlation of ECG alterations to the heart dose however, a direct influence of the capillary system of the heart has also to be discussed and an adequate after-care of patients with irradiation of the mediastine must be recommended. (author)

Mediastinal and heart wall invasion by actinomycosis: CT and MRI appearances

International Nuclear Information System (INIS)

Fisch, C.; Schmutz, G.R.; Benko, A.J.; Kastler, B.

1994-01-01

Widespread use of antibiotics facilitates the development of some uncommon chronic infections such as actinomycosis. The clinical and radiographic findings overlap those of other inflammatory and neoplastic conditions. With a review of the literature, we report the CT and MRI findings in a case of thoracic actinomycosis, presenting with right ventricular failure caused by heart involvement. CT was helpful in identifying the mediastinal extent of the disease and in demonstrating the absence of pulmonary involvement. MRI, however, offered complementary information, especially in assessing heart involvement without the need for intravenous contrast media. On T2-weighted images the mediastinal process was noted to be of relatively low signal intensity, possibly indicating its benign nature. The association with heart involvement was suggestive of thoracic actinomycosis. (orig.)

Fortification of Corn Masa Flour With Folic Acid in the United States

Science.gov (United States)

Oinuma, Motoko

2011-01-01

Food fortification is an effective public health tool for addressing micronutrient deficiencies. The mandatory fortification of enriched cereal grains (e.g., wheat flour) with folic acid, which began in the United States in 1998, is an example of a successful intervention that significantly reduced the rate of neural tube defects (NTDs). However, despite the drop in NTD rates across all racial/ethnic groups after fortification, Hispanics continue to have the highest rates of this condition. One possible way to reduce this disparity is to fortify corn masa flour to increase the overall intake of folic acid in Hispanic women. We present the available evidence in favor of this approach, address possible safety issues, and outline next steps in the fortification of corn masa flour with folic acid in the United States. PMID:21680940

Enzyme alterations in mediastine during and after radiotherapy. 2

International Nuclear Information System (INIS)

Alheit, H.D.; Alheit, C.; Herrmann, T.

1986-01-01

Results are presented estimating the serum activity of transaminases (ASAT and ALAT) in 72 patients after mediastinal irradiation. During and after mediastinal irradiation both enzymes showed essentially a parallel reaction. One day after irradiation a decrease of enzymes in patients who were irradiated with high single dosis (5 Gy) was observed, while patients irradiated with low or middle single dosis showed an increase of enzyme activity. A different temporal enzyme reaction is discussed to be the cause for this reaction in dependence on the applied single dose so that in patients with high single doses an initial enzyme increase caused by the radiation insult has changed into a following decrease under the starting level at the first control 24 hours later. Because patients without mediastinal tumors react in the same manner, the normal tissue surrounding the tumor is discussed to be the original place of enzyme secretion. Up to the end of irradiation a decrease of enzymes was observed in patients with high single dose or with high total dose (60 Gy) which is interpreted as an enzyme deficiency in tissue in consequence of destruction in formation places. In patients with middle total and low single doses an enzyme increase is registered with a still sufficient restoration capacity of the tissue discussed to be the cause of it. An enzyme increase, observed from the end of irradiation to the control date 3 to 6 months after irradiation, is mainly caused by a tumor progression (increased rate of liver metastases, especially in bronchial carcinoma) and can still be intensified by occurrence of pulmonal or cardiac radioreactions. (author)

Body mass index and its relationship to mental disorders in the Mexican Adolescent Mental Health Survey Índice de masa corporal y su relación con los trastornos mentales en la Encuesta de Salud Mental en Adolescentes de México

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Guilherme Borges

2010-04-01

Full Text Available OBJECTIVE: To assess the association between body mass index (BMI and the prevalence of psychiatric disorders among Mexico City adolescents. MATERIAL AND METHODS: Household survey of 3005 adolescents aged 12 to 17 residing in Mexico City in 2005 (response rate = 71%. Face to face interviews were carried out in the homes of participants with informed consent from a parent and/or legal guardian and the assent of the adolescent was obtained. Logistic regression analyses were performed. RESULTS: We only found an association between extremely low BMI and impulse control disorders. Elevated BMI was associated with impulse control disorders only among females. Specific impulse control disorders associated with low BMI included intermittent explosive disorder and conduct disorder. Only intermittent explosive disorder was associated with elevated BMI. CONCLUSION: Among Mexican adolescents, those with extremely high or extremely low BMI were more likely to have impulse control disorders than were adolescents with normal BMI.OBJETIVO: Evaluar la asociación entre el índice de masa corporal (IMC y la prevalencia de trastornos psiquiátricos en adolescentes de la Ciudad de México. MATERIAL Y MÉTODOS: 3005 adolescentes entre 12 y 17 años fueron entrevistados en 2005 (tasa de respuesta =71%. Las entrevistas cara a cara se hicieron en los hogares de los participantes seleccionados después del consentimiento de los padres o tutores. Se utilizó regresión logística. RESULTADOS: Sólo se encontró asociación entre IMC extremadamente bajo y trastornos de control de impulsos. El IMC elevado estuvo asociado con trastornos de control de impulsos sólo en las mujeres. Los trastornos de control de impulsos específicamente relacionados con bajo IMC incluyen el trastorno explosivo intermitente y el trastorno de conducta. El alto IMC estuvo relacionado únicamente con el trastorno explosivo intermitente. CONCLUSIÓN: Entre los adolescentes mexicanos, es m

Mediastinitis in cardiac surgery: A review of the literature | Kunal ...

African Journals Online (AJOL)

Background: Postoperative mediastinitis is a serious complication in cardiac surgery that substantially increases morbidity and mortality. Aim: This study reviews the various prophylactic and therapeutic measures. Material and Method: Literature searches were done to identify relevant studies. Results: Various possible ...

Endoscopic ultrasound-guided fine-needle aspiration cytology in the evaluation of suspected tuberculosis in patients with isolated mediastinal lymphadenopathy

DEFF Research Database (Denmark)

Puri, R.; Vilmann, P.; Sud, R.

2010-01-01

Patients with suspected tuberculosis without pulmonary lesions and with mediastinal lymphadenopathy often pose a diagnostic challenge. Endoscopic ultrasound (EUS)-guided fine-needle aspiration (FNA) cytology is an established modality to evaluate mediastinal and abdominal lesions. The aim...

The FDG uptake and glucose transporter(GLUT-1) expression of the mediastinal nodes in the non-small cell lung cancer

International Nuclear Information System (INIS)

Baik, Hee Jong; Jung, Jin Haeng

2000-12-01

The aim of this study was to understand the mechanism of FDG uptake in the mediastinal nodes, and improve the accuracy of mediastinal staging of non-small cell lung cancer by PET. To evaluate factors determining the FDG uptake in mediastinal nodes, FDG-PET was performed preoperatively, and mediastinal dissection with pulmonary resection was done in 20 LSCLC patients. The GLUT-1 expression was studied by immunohistochemistry of paraffin-section from the mediastinal nodes(n=50, true positive 11, true negative 23, false positive 11, false negative 5) using the antiGLUT-1 antibody. The staining intensity of tumor(grade 0-4), percentage of tumor, level of follicular hyperplasia(grade 1-4), and staining intensity of follicle was also studied. The staining intensity of true positive nodes was higher than that of false negative group(Mann-Whitney test, P=0.07) in the metastased nodes. The level of follicular hyperplasia of false positive nodes was higher than that of true negative nodes in non-metastased nodes(P=0.02). This finding indicates that FN interpretation of mediastinal nodes by FDG-PET might be associated with low uptake of FDG due to low expression of GLUT-1, and that FP might be associated with high level of follicular hyperplasia as a reactive change to inflammatory and/or immune reaction

CT of chronic infiltrative lung disease: Prevalence of mediastinal lymphadenopathy

Energy Technology Data Exchange (ETDEWEB)

Niimi, Hiroshi; Kang, Eun-Young; Kwong, S. [Univ. of British Columbia and Vancouver Hospital and Health Sciences Centre (Canada)] [and others

1996-03-01

Our goal was to determine the prevalence of mediastinal lymph node enlargement at CT in patients with diffuse infiltrative lung disease. The study was retrospective and included 175 consecutive patients with diffuse infiltrative lung diseases. Diagnoses included idiopathic pulmonary fibrosis (IPF) (n = 61), usual interstitial pneumonia associated with collagen vascular disease (CVD) (n = 20), idiopathic bronchiolitis obliterans organizing pneumonia (BOOP) (n = 22), extrinsic allergic alveolitis (EAA) (n = 17), and sarcoidosis (n = 55). Fifty-eight age-matched patients with CT of the chest performed for unrelated conditions served as controls. The presence, number, and sites of enlarged nodes (short axis {ge}10 mm in diameter) were recorded. Enlarged mediastinal nodes were present in 118 of 175 patients (67%) with infiltrative lung disease and 3 of 58 controls (5%) (p < 0.001). The prevalence of enlarged nodes was 84% (46 of 55) in sarcoidosis, 67% (41 of 61) in IPF, 70% (14 of 20) in CVD, 53% (9 of 17) in EAA, and 36% (8 of 22) in BOOP. The mean number of enlarged nodes was higher in sarcoidosis (mean 3.2) than in the other infiltrative diseases (mean 1.2) (p < 0.001). Enlarged nodes were most commonly present in station 10R, followed by 7, 4R, and 5. Patients with infiltrative lung disease frequently have enlarged mediastinal lymph nodes. However, in diseases other than sarcoid, usually only one or two nodes are enlarged and their maximal short axis diameter is <15 mm. 11 refs., 2 figs., 1 tab.

Feasibility of thoracoscopic approach for retrosternal goitre (posterior mediastinal goitre: Personal experiences of 11 cases

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Panchangam Ramakanth Bhargav

2016-01-01

Full Text Available Introduction: Posterior mediastinal goitres constitute of a unique surgical thyroid disorder that requires expert management. Occasionally, they require thoracic approach for the completion of thyroidectomy. In this paper, we describe the feasibility and utility of a novel thoracoscopic approach for such goitres. Materials and Methods: This is a retrospective study conducted at a tertiary care endocrine surgery department in South India over a period of 5 years from January 2010 to December 2014. We developed a novel thoracoscopic technique for posterior mediastinal goitres instead of a more morbid thoracotomy or sternotomy. All the clinical, investigative, operative, pathological and follow-up data were collected from our prospectively filled database. Statistical analysis was done with SPSS 15.0 version. Descriptive analysis was done. Operative Technique of Thoracoscopic Thyroidectomy: Single lumen endotracheal tube (SLETT was used of anaesthetic intubation and general inhalational anaesthesia. Operative decubitus was supine with extension and abduction of the ipsilateral arm. Access to mediastinum was obtained by two working ports in the third and fifth intercostal spaces. Mediastinal extension was dissected thoracoscopically and delivered cervically. Results: Out of 1,446 surgical goitres operated during the study period, 72 (5% had retrosternal goitre. Also, 27/72 (37.5% cases had posterior mediastinal extension (PME, out of which 11 cases required thoracic approach. We utilised thoracoscopic technique for these 11 cases. The post-operative course was uneventful with no major morbidity. There was one case of recurrent laryngeal nerve (RLN injury and hoarseness of voice in the third case. Histopathologies in 10 cases were benign, out of which two had subclinical hyperthyroidism. One case had multifocal papillary microcarcinoma. Conclusions: We opine that novel thoracoscopic technique is a feasibly optimal approach for posterior mediastinal

Diagnostic ranking of computerised tomography in mediastinal diseases depending on their localisation

Energy Technology Data Exchange (ETDEWEB)

Sommer, B.; Doppman, J.L.; Mayr, B.; Rienmueller, R.; Lissner, J.; Stelter, W.

1981-04-01

The diagnostic ranking and importance of computerised tomography was examined in 116 with abnormal findings in the mediastinal region, and was compared with conventional, non-invasive X-ray examinations. This method also yielded significant CT-specific additional information in the anterior mediastinum in 74.4% of the cases, in the mesomediastinum in 69.1%, in the posterior mediastinum in 79.2% in the upper thoracic aperture in 94.4% and in the paracardial region in 100% of the cases. The hilar region is an exception; in 68.8% of the cases, both methods were rated equal, whereas in 28.1% of the cases assessment via the CT method was even inferior. The specific additional information furnshed by the CT method justifies a wider application of CT in solving the following problems concerning the mediastinum: Clarification of a suspected but not yet established space-occupying growth in the mediastinum, before using invasive diagnostic methods such as mediastinoscopy and angiography; staging of an already identified primary mediastinal tumor or malignant lymphoma; in case of suspected changes in the large mediastinal vessels before employing angiography; on-target in the following diseases: bronchogenic carcinoma (because of improved pretherapeutic staging according to the TNM system), myasthenia gravis and identification of thymoma, hyperparathyroidism with suspected dystopic parathyroid glands.

Mediastinal staging for lung cancer: the influence of biopsy volume

DEFF Research Database (Denmark)

Nelson, Elof; Pape, Christian; Jørgensen, Ole Dan

2010-01-01

OBJECTIVE: Mediastinal staging is of paramount importance prior to surgery for non-small-cell lung cancer (NSCLC) to identify patients with N2-disease. Mediastinoscopy remains the gold standard, and sampling from at least three lymph node stations is generally recommended. It is unknown whether...

Agility influences on bone mass in elderly people Relación entre masa ósea y agilidad en personas mayores

Directory of Open Access Journals (Sweden)

A. Gómez-Cabello

2010-12-01

Full Text Available The main purpose of this study was to test the association between bone-related variables and agility in elderly people. A total of 223 participants 65 years and older (64 men and 159 women were evaluated in Zaragoza (Spain. Bone area, mineral content (BMC and density (BMD were assessed in whole body, spine and hip by dual-energy X-ray absorptiometry (DXA. Agility was measured using the 8-Foot Up and Go Test (modified of the Senior Fitness Test battery. The difference between male and female in agility was studied with one-way ANOVA. The association between agility and bone-related variables was tested by linear regression accounting for differences in age, height and lean mass. Results showed that men had better agility than women (P<0.05. In men agility was only associated with pelvis area explaining 4% of variation (P<0.05. In women agility explained from 2% to 18% of variability in BMC and BMD in the subtotal whole body, trochanter and lower limbs respectively (all P<0.01. In conclusion, agility showed a close association with BMC and BMD mainly in postmenopausal women.
Key Words: bone mineral content (BMC, bone mineral density (BMD, physical fitness, ageing.

El objetivo de este estudio fue analizar la asociación entre masa ósea y agilidad en personas mayores. Se evaluó a 223 participantes mayores de 65 años (64 hombres y 159 mujeres de Zaragoza (España. Se midió el área, contenido (CMO y densidad mineral ósea (DMO en el cuerpo completo, columna lumbar y cadera mediante absorciometría fotónica dual de rayos X (DXA. La agilidad se evaluó con el test “8-Foot Up and Go” (modificado de la batería Senior Fitness Test. La diferencia en agilidad entre sexos se estudió mediante tests ANOVA. La asociación entre agilidad y masa ósea se analizó mediante regresión lineal teniendo en cuenta las diferencias en edad, talla y masa magra. Los resultados mostraron que los hombres eran más ágiles que las mujeres (P

Mediastinal cystic lymphangioma Linfangioma cístico do mediastino

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Sandra Saleiro

2006-11-01

Full Text Available Mediastinal lymphangioma is a rare vascular neoplasm, accounting for 0.7 to 4.5% of all the mediastinum tumors. It is a benign tumor, generally occurring as a mediastinal mass of slow growth. Most patients are asymptomatic, being incidentally diagnosed after a routine chest radiograph. The best treatment consists of complete surgical resection. Prognosis depends on the degree of resecability degree, and recurrence is not expected if the lesion is totally removed.O linfangioma mediastínico é uma neoplasia vascular rara, correspondendo a 0,7 a 4,5% de todos os tumores do mediastino. É um tumor benigno, que ocorre geralmente como uma massa mediastínica de crescimento lento. A maioria dos doentes está assintomática, sendo diagnosticado incidentalmente, após a realização de uma radiografia torácica de rotina. O tratamento de eleição consiste na ressecção cirúrgica completa. O prognóstico depende do grau de ressecabilidade e, se a lesão for totalmente removida, não se esperam recidivas.

[Blood conservation effect and safety of shed mediastinal blood autotransfusion after cardiac surgery].

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Komiya, T; Ban, K; Yamazaki, K; Date, O; Nakamura, T; Kanzaki, Y

1998-10-01

Autotransfusion of shed mediastinal blood after cardiac surgery has been used to reduce risks related to homologous blood transfusions. To document the efficacy and safety of autotransfusion, we compared clinical findings of 80 patients receiving shed mediastinal blood (autotransfusion group) with those of the control group of 52 patients. The amount of the autotransfusion was limited to 800 ml, given the potentially harmful effects of shed blood transfusion. The mean transfused shed volume was 314 +/- 236 ml (S.D.). The serum levels of FDP-E, D-dimer and TAT after autotransfusion were higher in the autotransfusion group than in the control group (p = 0.01, p = 0.0004, p = 0.001, respectively). However, postoperative blood loss and the rate of reexploration for bleeding were similar in the two groups. The patients receiving blood products were fewer in the autotransfusion group than those in the control group (21% vs 44%; p = 0.005). Autotransfusion did not increase postoperative complications, including infection. Thus, although autotransfusion of mediastinal shed blood has the potential to affect hemostasis, unless the amount of autotransfusion exceeds 800 ml, it appears that this method is clinically safe and effective as a mean of blood conservation.

Surgical management of mediastinal liposarcoma extending from hypopharynx to carina: Case report

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Morse Christopher R

2010-03-01

Full Text Available Abstract We describe the complete resection of a giant, well-differentiated mediastinal liposarcoma extending retropharynx to envelop the aortic arch, trachea and esophagus following preoperative radiotherapy.

Estimación de la masa muscular segmentada, por medio de ecuaciones antropométricas y su relación con la dexa, en deportistas recreativos

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Rodríguez Rodríguez, Fernando Javier

2011-01-01

Los métodos antropométricos que estiman la masa muscular (MM), no precisan los valores por segmento corporal, lo que tiene una importancia fundamental para sujetos que practican actividad física o para el diagnostico clínico en tener este conocimiento. En este estudio se evalúan antropométricamente y a través de Densitometría Fotónica Dual (DEXA) a 60 deportistas recreativos. Posteriormente se aplica una estadística de regresión lineal para establecer las constantes que permiten la obtención ...

Percutaneous Image-Guided Cryoablation of Challenging Mediastinal Lesions Using Large-Volume Hydrodissection: Technical Considerations and Outcomes

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Garnon, Julien, E-mail: juliengarnon@gmail.com; Koch, Guillaume, E-mail: Guillaume.koch@gmail.com; Caudrelier, Jean, E-mail: caudjean@yahoo.fr [University Hospital of Strasbourg, Department of Interventional Radiology (France); Ramamurthy, Nitin, E-mail: Nitin-ramamurthy@hotmail.com [Norfolk and Norwich University Hospital, Department of Radiology (United Kingdom); Rao, Pramod, E-mail: pramodrao@me.com [University of Strasbourg, ICube (France); Tsoumakidou, Georgia, E-mail: Georgia.tsoumakidou@chru-strasbourg.fr; Cazzato, Roberto Luigi, E-mail: cazzatorobertoluigi@gmail.com; Gangi, Afshin, E-mail: Afshin.gangi@chru-strasbourg.fr [University Hospital of Strasbourg, Department of Interventional Radiology (France)

2016-11-15

ObjectiveThis study was designed to describe the technique of percutaneous image-guided cryoablation with large-volume hydrodissection for the treatment of challenging mediastinal lesions.MethodsBetween March 2014 and June 2015, three patients (mean age 62.7 years) with four neoplastic anterior mediastinal lesions underwent five cryoablation procedures using large-volume hydrodissection. Procedures were performed under general anaesthesia using CT guidance. Lesion characteristics, hydrodissection and cryoablation data, technical success, complications, and clinical outcomes were assessed using retrospective chart review.ResultsLesions (mean size 2.7 cm; range 2–4.3 cm) were in contact with great vessels (n = 13), trachea (n = 3), and mediastinal nerves (n = 6). Hydrodissection was performed intercostally (n = 4), suprasternally (n = 2), transsternally (n = 1), or via the sternoclavicular joint (n = 1) using 1–3 spinal needles over 13.4 (range 7–26) minutes; 450 ml of dilute contrast was injected (range 300–600 ml) and increased mean lesion-collateral structure distance from 1.9 to 7.7 mm. Vulnerable mediastinal nerves were identified in four of five procedures. Technical success was 100 %, with one immediate complication (recurrent laryngeal nerve injury). Mean follow-up period was 15 months. One lesion demonstrated residual disease on restaging PET-CT and was retreated to achieve complete ablation. At last follow-up, two patients remained disease-free, and one patient developed distant disease after 1 year without local recurrence.ConclusionsCryoablation using large-volume hydrodissection is a feasible technique, enabling safe and effective treatment of challenging mediastinal lesions.

Usefulness of thin slice target CT scan in detecting mediastinal and hilar lymphadenopathy

International Nuclear Information System (INIS)

Yoshida, Shoji; Maeda, Tomoho; Nishioka, Masatoshi

1986-01-01

Comparative study of target scan with the different slice thickness and scan modes was performed to evaluate the mediastinal and hilar lymphadenopathy. 20 cases in controls and 35 cases in lymphadenopathy were examined. To delineate mediastinal and hilar lymphadenopathy, the scan mode of standard target was most useful in contrast and sharpness. Thin slice thickness with 5 mm was necessary in detecting small lymphnode or contour and internal structure of enlarged lymphnode. Valuable estimation of 5 mm contiguous target scan was obtained in the subaortic node (no. 5), tracheobronchial node (no. 4), precarinal and subcarinal node (no. 7) and right hilar node (no. 12). (author)

Influencia de la transferencia de masa y calor en la destilación de mezclas multicomponentes

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Gutiérrez Hernández, Juan Pablo; Guapacha Martínez, Jorge Ariel

2005-01-01

En el presente trabajo se plantean los modelos de Fick generalizado y de Maxwell Stefan para la transferencia de masa multicomponente y se realiza un análisis comparativo entre ambos. Se estudia la transferencia simultánea de masa y energía en varios sistemas multicomponentes reactivos y se aplica el modelo de película en la interfase líquido-vapor asumiendo que la reacción solo ocurre en la fase líquida. Se presentan los modelos de equilibrio y de no-equilibrio aplicados a una columna de des...

Descending necrotizing mediastinitis following dental extraction. Radiological features and surgical treatment considerations.

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González-García, Raúl; Risco-Rojas, Roberto; Román-Romero, Leticia; Moreno-García, Carlos; López García, Cipriano

2011-07-01

Descending necrotizing mediastinitis (DNM) following dental extraction is an extremely serious infection with a high mortality rate. Oral infection may rapidly descend into the mediastinum across the retropharyngeal and retrovisceral spaces. Once established, mediastinitis is rapidly followed by sepsis and death. If DNM is suspected cervical and thoracic CT must be carried out urgently. After this, prompt control of the upper airway with tracheostomy, aggressive surgical debridement of the deep cervical spaces and mediastinum, and intravenous broad spectrum antibiotic therapy are mandatory. The present paper reports two new cases of DNM following dental extraction, and focuses on radiological features of abscess progression through the cervical spaces down into the mediastinum. 2010 European Association for Cranio-Maxillo-Facial Surgery. Published by Elsevier Ltd. All rights reserved.

Giant Cell Tumor of the Thoracic Spine Presenting as a Posterior Mediastinal Tumor with Benign Pulmonary Metastases: A Case Report

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Kim, Tae Hun [Daegu Fatima Hospital College of Medicine, Daegu (Korea, Republic of); Rho, Byung Hak; Bahn, Young Eun; Choi, Won Il [Dongsan Medical Center, Keimyung University School of Medicine, Daegu (Korea, Republic of)

2010-11-15

Giant cell tumor of bone is a benign, but potentially aggressive lesion that can show local recurrence and metastases. We report here on a case of a 29-year-old man who presented with an incidentally found mediastinal mass. Chest radiography and computed tomography showed a huge mediastinal mass with bilateral pulmonary nodules and the diagnosis of giant cell tumor with benign pulmonary metastasis was confirmed. To the best of our knowledge, this is the first reported case of primary thoracic spinal giant cell tumor manifesting as a huge mediastinal mass with pulmonary metastases

Diagnóstico de masas intracraneales primarias por medio imagenológicos Diagnosis of intracranial masses using imaging techniques

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Samael Suero Almonte

2012-02-01

Full Text Available Se realizó un estudio descriptivo, longitudinal y transversal que incluyó a los pacientes operados de neoplasia del sistema nervioso central intracraneal en el Hospital General Docente "Abel Santamaría Cuadrado " de la provincia Pinar del Río, durante el período comprendido desde el 1 de enero de 2010 hasta el 31 de diciembre del mismo año. Se incluyeron todos los pacientes egresados a los que se les había realizado tomografía computarizada o resonancia magnética y poseían diagnóstico histológico postoperatorio de neoplasia primaria del sistema nervioso central (SNC intracraneal. Se concluyó que las neoplasias primarias fueron más frecuentes en el sexo femenino y en grupo de edad de 70 años y más. Las localizaciones más frecuentes de las neoplasias primarias del sistema nervioso central fueron las masas intraaxiales y supratentoriales y el tipo histológico más prevalente fue el glioma. Todas se comportaron imagenológicamente captantes de contraste, con poca hemorragia y calcificación intermediamente con efecto de masa y hipointensas en T1 hiperintensas en T2.A descriptive, longitudinal and cross-sectional study including the patients operated on intracranial central nervous system neoplasm was carried out at "Abel Santamaria Cuadrado" University Hospital, Pinar del Rio during January 1, 2010 to December 31, 2010. All patients discharged from the hospital with Computerized Axial Tomography or Magnetic Resonance Imaging and having post-operative histological diagnosis of primary intracranial neoplasm of the central nervous system (CNS were included. Primary neoplasm was the most frequent in female sex and in the age-bracket of 70 years old or older. The most repeated localizations of primary neoplasm in the CNS were in intra-axial and supratentorial masses, glioma was the most prevailing histological type. Contrast examinations could be performed in all masses, presenting not much hemorrhage, with intermediate

Normal mediastinal and hilar lymph nodes evaluated by 5 mm slice bolus injection CT scan

International Nuclear Information System (INIS)

Yamamoto, Takako; Tsukada, Hiroshi; Koizumi, Naoya; Akita, Shinichi; Oda, Junichi; Sakai, Kunio

1995-01-01

We evaluated the number and size of normal mediastinal and hilar lymph nodes by 5 mm slice bolus injection CT (12 patients), compared with 10 mm slice CT (12 patients). More lymph nodes were clearly demonstrated by 5 mm slice CT than by 10 mm slice CT. Especially left-sided tracheobronchial (no.4), subaortic (no.5), subcarinal (no.7) and hilar lymph nodes were clearly visible. We concluded 5 mm slice bolus injection CT was useful to evaluate mediastinal and hilar lymph nodes. (author)

Density and SUV Ratios from PET/CT in the Detection of Mediastinal Lymph Node Metastasis in Non-small Cell Lung Cancer

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Tingting SHAO

2015-03-01

Full Text Available Background and objective Mediastinal involvement in lung cancer is a highly significant prognostic factor for survival, and accurate staging of the mediastinum will correctly identify patients who will benefit the most from surgery. Positron emission tomography/computed tomography (PET/CT has become the standard imaging modality for the staging of patients with lung cancer. The aim of this study is to investigate 18-fluoro-2-deoxy-glucose (18F-FDG PET/CT imaging in the detection of mediastinal disease in lung cancer. Methods A total of 72 patients newly diagnosed with non-small cell lung cancer (NSCLC who underwent preoperative whole-body 18F-FDG PET/CT were retrospectively included. All patients underwent radical surgery and mediastinal lymph node dissection. Mediastinal disease was histologically confirmed in 45 of 413 lymph nodes. PET/CT doctors analyzed patients’ visual images and evaluated lymph node’s short axis, lymph node’s maximum standardized uptake value (SUVmax, node/aorta density ratio, node/aorta SUV ratio, and other parameters using the histopathological results as the reference standard. The optimal cutoff value for each ratio was determined by receiver operator characteristic curve analysis. Results Using a threshold of 0.9 for density ratio and 1.2 for SUV ratio yielded high accuracy for the detection of mediastinal disease. The lymph node’s short axis, lymph node’s SUVmax, density ratio, and SUV ratio of integrated PET/CT for the accuracy of diagnosing mediastinal lymph node was 95.2%. The diagnostic accuracy of mediastinal lymph node with conventional PET/CT was 89.8%, whereas that of PET/CT comprehensive analysis was 90.8%. Conclusion Node/aorta density ratio and SUV ratio may be complimentary to conventional visual interpretation and SUVmax measurement. The use of lymph node’s short axis, lymph node’s SUVmax, and both ratios in combination is better than either conventional PET/CT analysis or PET

Surgical debridement, vacuum therapy and pectoralis plasty in poststernotomy mediastinitis.

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Ennker, I C; Pietrowski, D; Vöhringer, L; Kojcici, B; Albert, A; Vogt, P M; Ennker, J

2009-11-01

In cardiac surgery poststernotomy mediastinitis continues to be a serious cause of morbidity and mortality. We report our experience with vacuum-assisted closure (VAC) therapy followed by reconstruction with M. pectoralis muscle flaps as treatment for deep sternal wound infections. Our group performed a retrospective analysis of 3630 consecutive cardiac surgical patients using median sternotomy from 11/2004 to 11/2007. After removing sternal wires, necrotic debris and potentially infective material, restabilisation of the sternum was performed and VAC therapy was employed. Wound closure and subsequent reconstruction were performed using a bilateral pectoralis muscle plasty. Of the analysed patients 16 female and 29 male patients suffered from deep sternal wound infections and were treated with VAC. The most common risk factors were diabetes mellitus odds ratio (OR 3.5), chronic obstructive pulmonary disease (COPD) (OR 2.9), use of bilateral mammarian artery (OR 2.0) and obesity (1.8). The median age of patients with deep sternal infections was similar to control patients. Staphylococcus epidermis was the most common pathogen (37.8%) followed by Enterococcus faecilis (22.2%) and Staphylococcus aureus (17.8). In 22.2% no pathogen could be detected. The 30 day mortality was 0%, the in-hospital mortality was 15.6%. The results of our studies demonstrate that vacuum therapy in conjunction with early and aggressive debridement is an effective strategy for treating poststernotomy mediastinitis. We consider pectoralis major muscle flap reconstruction as a safe technique and regard it as the primary choice for wound closure in poststernotomy mediastinitis. (c) 2009 British Association of Plastic, Reconstructive and Aesthetic Surgeons. Published by Elsevier Ltd. All rights reserved.

CT fluoroscopy-guided core needle biopsy of anterior mediastinal masses.

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Iguchi, T; Hiraki, T; Matsui, Y; Fujiwara, H; Sakurai, J; Masaoka, Y; Uka, M; Tanaka, T; Gobara, H; Kanazawa, S

2018-02-01

To retrospectively evaluate the safety, diagnostic yield, and risk factors of diagnostic failure of computed tomography (CT) fluoroscopy-guided biopsies of anterior mediastinal masses. Biopsy procedures and results of anterior mediastinal masses in 71 patients (32 women/39 men; mean [±standard deviation] age, 53.8±20.0years; range, 14-88years) were analyzed. Final diagnoses were based on surgical outcomes, imaging findings, or clinical follow-up findings. The biopsy results were compared with the final diagnosis, and the biopsy procedures grouped by pathologic findings into diagnostic success and failure groups. Multiple putative risk factors for diagnostic failure were then assessed. Seventy-one biopsies (71 masses; mean size, 67.5±27.3mm; range 8.6-128.2mm) were analyzed. We identified 17 grade 1 and one grade 2 adverse events (25.4% overall) according to the National Cancer Institute Common Terminology Criteria for Adverse Events version 4.0. Sixty-nine biopsies (97.2%) provided samples fit for pathologic analysis. Diagnostic failure was found for eight (11.3%) masses; the 63 masses diagnosed successfully included thymic carcinoma (n=17), lung cancer (n=14), thymoma (n=12), malignant lymphoma (n=11), germ cell tumor (n=3), and others (n=6). Using a thinner needle (i.e., a 20-gauge needle) was the sole significant risk factor for diagnostic failure (P=0.039). CT fluoroscopy-guided biopsy of anterior mediastinal masses was safe and had a high diagnostic yield; however, using a thinner biopsy needle significantly increased the risk of a failed diagnosis. Copyright © 2017 Éditions françaises de radiologie. Published by Elsevier Masson SAS. All rights reserved.

Bilateral Video-Assisted Thoracoscopic Surgery Resection for Multiple Mediastinal Myelolipoma: Report of a Case

Science.gov (United States)

Kohno, Tadasu; Mun, Mingyon; Yoshiya, Tomoharu

2014-01-01

Myelolipoma in the mediastinum is an extremely rare entity. In this report, we present the case of a 79-year-old asymptomatic man who had three bilateral paravertebral mediastinal tumors. The three tumors were resected simultaneously using bilateral three-port video-assisted thoracoscopic surgery (VATS). There has been no evidence of recurrence within four years after the operation. Multiple bilateral mediastinal myelolipomas are extremely rare. There are no reports in the English literature of multiple bilateral thoracic myelolipomas that were resected simultaneously using bilateral VATS. We also present characteristic features of myelolipomas, which are helpful for diagnosis. PMID:24782978

Aprendizaje de los conceptos de masa, peso y gravedad. Investigación de la efectividad de un modelo analógico

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Lucrecia E. Moro

2007-01-01

Full Text Available La línea de investigación sobre los procesos de enseñanza y aprendizaje científico basada en modelos analógicos ha adquirido relevancia, pero notamos que son pocas las aplicaciones en el aula, sobre todo en el nivel medio de enseñanza. Los modelos didácticos analógicos son una herramienta importante para la instrucción pero a condición de que el profesor y los alumnos adquieran una visión en común sobre el análogo y se describan sus limitaciones comparado con el modelo teorético. Se espera del alumno una toma de conciencia sobre sus procesos y eventos cognitivos para que pueda evaluar los progresos y resultados, comprendiendo su propia versión acerca de la naturaleza de su conocimiento y sobre el proceso de aprendizaje, es decir sobre sus esencias epistemológicas. En este trabajo se evalúa la eficiencia de un modelo didáctico analógico para la enseñanza de los conceptos de masa, peso y gravedad mediante un estudio correlacional, cuasiexperimental con posprueba y grupo control.

Mediastinal involvement in adults with lymphoblastic lymphoma

International Nuclear Information System (INIS)

Schwartz, E.E.; Conroy, J.F.; Bonner, H.; Hahnemann Univ. Hospital, Philadelphia, PA; Hahnemann Univ. Hospital, Philadelphia, PA; Chester County Hospital, West Chester, PA

1987-01-01

Radiologic, clinical, and pathologic findings are described in 6 young adults with lymphoblastic lymphoma (LBL), an aggressive tumor which has recently become recognized as a serious threat to adults as well as to children. Each patient presented with a mediastinal mass, three of them developing cardiac tamponade and one a superior vena cava syndrome. CT scanning and echocardiography were particularly helpful in defining the lesions. The rapid dissemination of LBL, and its early progression to a leukemic phase call for promt diagnosis and treatment. (orig.)

Mediastinal involvement in adults with lymphoblastic lymphoma

Energy Technology Data Exchange (ETDEWEB)

Schwartz, E.E.; Conroy, J.F.; Bonner, H.

Radiologic, clinical, and pathologic findings are described in 6 young adults with lymphoblastic lymphoma (LBL), an aggressive tumor which has recently become recognized as a serious threat to adults as well as to children. Each patient presented with a mediastinal mass, three of them developing cardiac tamponade and one a superior vena cava syndrome. CT scanning and echocardiography were particularly helpful in defining the lesions. The rapid dissemination of LBL, and its early progression to a leukemic phase call for promt diagnosis and treatment.

Dislipidemia en pacientes con artritis reumatoide atendidos en un hospital general

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Jose Galindo

2011-04-01

Full Text Available Objetivo: Determinar la frecuencia de dislipidemia en pacientes con artritis reumatoide (AR atendidos en un hospital general. Material y métodos: Estudio observacional, descriptivo y transversal. Se incluyeron 44 pacientes a quienes se les determinó perfil lipídico sérico. Los resultados se clasificaron según el reporte modificado en el 2004 del tercer panel de tratamiento del adulto (ATP III. Además, se determinó el índice de masa corporal (IMC, la puntuación para la actividad de la enfermedad (DAS-28 y la limitación funcional medida con el cuestionario de evaluación de salud - versión peruana (HAQ-P. Resultados: La frecuencia de dislipidemia en pacientes con AR fue 75%. El 54,5% tuvo un IMC fuera de los límites normales. En el DAS-28, la mayoría de pacientes se encontraron con actividad severa de la enfermedad. Sin embargo, hubo más pacientes con dislipidemia en el grupo con moderada actividad. En la escala de HAQ-P, la mitad tuvo incapacidad funcional moderada a severa y mayor número de sujetos con dislipidemia. El 69,7% de los pacientes con alteraciones en el perfil lipídico presentó dislipidemia mixta. Conclusiones: La dislipidemia en los pacientes con AR del estudio se presentó con una alta frecuencia y con diversas formas de alteración en el perfil lipídico sin un patrón uniforme. Por lo tanto, el tratamiento de la dislipidemia sería individualizado en cada paciente para prevenir eventos cardiovasculares.(Rev Med Hered 2011;22:47-53.

Posterior Mediastinal Adenomatoid Tumor: A Case Report and Review of the Literature

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Vishwas Parekh

2016-01-01

Full Text Available Adenomatoid tumor is an uncommon benign neoplasm of mesothelial differentiation that distinctively arises in and around the genital organs. In rare instances, it has been described in extragenital locations. There have been only two reports documenting its occurrence in the anterior mediastinum, and no reports documenting its occurrence in the posterior mediastinum. We report the first case of posterior mediastinal adenomatoid tumor. A 37-year-old Caucasian woman presented with symptoms of bronchitis. Imaging studies identified a 2.0 cm posterior mediastinal mass abutting the T9 vertebral body, clinically and radiologically most consistent with schwannoma. Histologic sections revealed a lesion composed of epithelioid cells arranged in cords and luminal profiles embedded in a fibrotic to loose stroma and surrounded by a fibrous pseudocapsule. Lesional cells showed vacuolated eosinophilic cytoplasm and peripherally displaced nuclei with prominent nucleoli. There was focal cytologic atypia but no mitotic figures or necrosis was identified. The lesional cells expressed cytokeratin, calretinin, and nuclear WT1 but were negative for PAX8, TTF1, p53, chromogranin, CD31, and CD34, and Ki67 showed <2% proliferation rate, diagnostic of adenomatoid tumor. Three years after resection, the patient is in good health without tumor recurrence. Thus, our encounter effectively expands the differential diagnosis of posterior mediastinal neoplastic entities.

Mediastinal lymphoma: quantitative changes in gadolinium enhancement at MR imaging after treatment.

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Rahmouni, A; Divine, M; Lepage, E; Jazaerli, N; Belhadj, K; Gaulard, P; Golli, M; Reyes, F; Vasile, N

2001-06-01

To compare changes in gadolinium enhancement at magnetic resonance (MR) imaging with outcome in mediastinal lymphoma after treatment. Thirty-one patients with bulky mediastinal lymphoma (17 with Hodgkin disease, 14 with non-Hodgkin lymphoma) underwent serial MR imaging before and up to 50 months after treatment, with routine follow-up (including computed tomography). Signal intensity ratios between masses and muscle were calculated on T1-weighted, T2-weighted, and contrast material-enhanced T1-weighted spin-echo MR images. The percentage enhancement and signal intensity ratios of mediastinal masses on T2-weighted MR images were calculated at diagnosis and during and after treatment. Twenty-one patients with persistent complete remission had a mean percentage enhancement of residual masses (4%; range, -26% to 40%) that was significantly lower than that of initial masses (78%; range, 41%-124%). Although the mean signal intensity ratio of residual masses on T2-weighted images was significantly lower than that of initial masses, an increase in this ratio was observed in four patients after treatment. In seven patients with relapse, the percentage enhancement value of the residual mass was as high as that of the initial mass. Gadolinium enhancement of lymphomatous masses of the mediastinum decreased markedly after treatment in patients in continuous complete remission but not in patients with relapse.

Utility and safety of endobronchial ultrasound-guided transbronchial needle aspiration in patients with mediastinal and hilar lymphadenopathy: Western region experience.

Science.gov (United States)

Aljohaney, Ahmed A

2018-01-01

The aim of the study was to evaluate the clinical utility and safety of endobronchial ultrasound-guided transbronchial needle aspiration (EBUS-TBNA) in patients with mediastinal and hilar lymphadenopathy and to explicitly describe the utility of this procedure in patient's outcome. A retrospective review and analysis was conducted on 52 patients with mediastinal or hilar lymphadenopathy who underwent EBUS-TBNA from June 2012 to June 2016. All the patients were evaluated by computed tomography (CT) chest with contrast before EBUS examination. Enlarged mediastinal or hilar lymph node was defined as >1 cm short axis on the enhanced CT. Among the 52 patients studied, 57.7% were presented with mediastinal or hilar lymphadenopathy for diagnosis and 42.3% presented with suspected mediastinal malignancy. Paratracheal stations were the most common site for puncture in 33 lymph nodes (43%). The best diagnostic yield was obtained from subcarinal stations and the lowest yield from the hilar stations. Surgical biopsies confirmed lymphoma in six patients, tuberculosis (TB) in three, sarcoidosis in two and one had metastatic adenocarcinoma of unknown primary. The sensitivity, specificity, positive predictive value, and negative predictive value of EBUS-TBNA for diagnosis of mediastinal and hilar lymph node abnormalities were 78.6%, 100%, 100%, and 80%, respectively. The diagnostic yield of EBUS-TBNA in malignant and benign conditions was 79.0%. EBUS-TBNA is a safe and efficacious procedure which can be performed using conscious sedation with high yields. It can be used for the staging of malignancies as well as for the diagnosis of inflammatory and infectious conditions such as sarcoidosis and TB.

Primary Mediastinal Synovial Sarcoma Presenting as Superior Vena Cava Syndrome: A Rare Case Report and Review of the Literature

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Irappa Madabhavi

2015-01-01

Full Text Available Primary mediastinal sarcomas are aggressive tumors with a very rare incidence. This report describes the case of a 35-year-old male patient who presented with acute symptoms of dyspnoea, facial puffiness, voice-hoarseness, and engorged neck veins. With the clinical picture consistent with the superior vena cava (SVC syndrome, the patient was investigated with computed tomography of the chest. This revealed a large soft tissue density mass lesion compressing the SVC along with other critical superior mediastinal structures. Histopathological evaluation of the mass revealed features consistent with a soft tissue sarcoma and positive staining was observed for vimentin and S-100. Cytogenetic analysis by fluorescent in situ hybridisation (FISH demonstrated the t(X:18 translocation. Thus diagnosis was established as primary mediastinal synovial sarcoma. Patient was treated with three cycles of neoadjuvant chemotherapy, to which there was a partial response as per the RECIST criteria. Surgical excision of the mediastinal mass was performed, and further postoperative treatment with adjuvant chemoradiotherapy was provided. Patient currently is free of disease. This is to the best of our knowledge the first report in the world literature of a successfully treated case of “primary mediastinal sarcomas presenting as SVC syndrome.” Patient is under regular surveillance at our clinic and remains free of recurrence one year after treatment completion.

Actividad física en pacientes ambulatorios con diabetes mellitus 2 de un Hospital Nacional del Perú

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Ana Josefina Manzaneda

Full Text Available Con el objetivo de determinar el nivel de actividad física que realizan los pacientes ambulatorios con diabetes mellitus tipo 2 (DM 2 que acuden a un Hospital Nacional de Lima, Perú se incluyó a 120 pacientes en quienes se aplicó el cuestionario internacional de actividad física IPAQ. El 66% fueron mujeres, la edad media fue 61,6 años, el 70% presentó mal control glicémico. El 20% de pacientes calificaba como inactivo, 68% con mínima actividad y 12% con actividad física adecuada. No se halló relación entre actividad física, tiempo de enfermedad, control glicémico, ni el índice de masa corporal. La edad se asoció negativamente con la actividad física. Se concluye que existen bajos niveles de actividad física en pacientes con DM 2 y esta no se enfoca en actividades de ocio que proveen beneficios a la salud

Wagnerianos, flâneurs, hombres-masa. Los ambientes sinestésicos en la arquitectura fin-de-siècle

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Eduardo Prieto

2014-10-01

Full Text Available Con su énfasis en la contaminación entre las disciplinas, así como en el papel que otorgan a la integración de los sentidos humanos en la percepción del espacio, las investigaciones contemporáneas sobre las “atmósferas” habitadas tienen un antecedente apenas señalado por la historiografía: la arquitectura fin-de-siècle. En la Francia de finales del siglo XIX la sinestesia se convierte en un tema de moda que, procedente de la recién fundada estética psicológica, pronto desbordará sus primitivos límites para alcanzar la arquitectura; en Alemania, por su parte, la noción romántica de la Gesamtkunstwerk encontrará en el teatro de Wagner un nuevo campo donde las artes colaborarán para producir sorprendes ambientes oníricos. En paralelo, la percepción sinestésica se transformará en el leitmotiv de las instalaciones concebidas para el disfrute multisensorial de los miembros de una incipiente cultura de masas, y dará pie a arquitecturas tan lúdicas como técnica­mente sofisticadas: las construcciones para ferias internacionales. Los ambientes sinestésicos para flâneurs, wagnerianos y hombres-masa serán, así, el germen de los pabellones electroacústicos de Le Corbusier, Iannis Xenakis o Charles y Ray Eames, y de las experiencias de integración ambiental entre las artes propias de Jean Labatut, Charles Moore y, en general, buena parte de las vanguardias de las décadas de 1950 y 1960.

Cervical necrotising fasciitis and descending mediastinitis secondary to unilateral tonsillitis: a case report

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Islam Asad

2008-12-01

Full Text Available Abstract Introduction Cervical necrotizing fasciitis is an aggressive infection with high morbidity and mortality. We present a case of cervical necrotizing fasciitis and descending mediastinitis in a healthy young man, caused by unilateral tonsillitis with a successful outcome without aggressive debridement. Case presentation A 41-year-old man was admitted to our unit with a diagnosis of severe acute unilateral tonsillitis. On admission, he had painful neck movements and the skin over his neck was red, hot and tender. Computed tomography scan of his neck and chest showed evidence of cervical necrotizing fasciitis and descending mediastinitis secondary to underlying pharyngeal disease. He was treated with broad-spectrum intravenous antibiotics. His condition improved over the next 3 days but a tender and fluctuant swelling appeared in the suprasternal region. A repeat scan showed the appearance of an abscess extending from the pretracheal region to the upper mediastinum which was drained through a small transverse anterior neck incision. After surgery, the patient's condition quickly improved and he was discharged on the 18th day of admission. Conclusion Less invasive surgical techniques may replace conventional aggressive debridement as the treatment of choice for cervical necrotizing fasciitis and descending necrotizing mediastinitis.

The diagnostic ranking of computerised tomography in mediastinal diseases depending on their localisation

International Nuclear Information System (INIS)

Sommer, B.; Doppman, J.L.; Mayr, B.; Rienmueller, R.; Lissner, J.; Stelter, W.

1981-01-01

The diagnostic ranking and importance of computerised tomography was examined in 116 with abnormal findings in the mediastinal region, and was compared with conventional, non-invasive X-ray examinations. This method also yielded significant CT-specific additional information in the anterior mediastinum in 74.4% of the cases, in the mesomediastinum in 69.1%, in the posterior mediastinum in 79.2% in the upper thoracic aperture in 94.4% and in the paracardial region in 100% of the cases. The hilar region is an exception; in 68.8% of the cases, both methods were rated equal, whereas in 28.1% of the cases assessment via the CT method was even inferior. The specific additional information furnshed by the CT method justifies a wider application of CT in solving the following problems concerning the mediastinum: Clarification of a suspected but not yet established space-occupying growth in the mediastinum, before using invasive diagnostic methods such as mediastinoscopy and angiography; staging of an already identified primary mediastinal tumor or malignant lymphoma; in case of suspected changes in the large mediastinal vessels before employing angiography; on-target in the following diseases: bronchogenic carcinoma (because of improved pretherapeutic staging according to the TNM system), myasthenia gravis and identification of thymoma, hyperparathyroidism with suspected dystopic parathyroid glands. (orig.) [de

Findings chest radiograph and CT in mediastinitis: effcacy of CT in patients with delayed diagnosis

Energy Technology Data Exchange (ETDEWEB)

Son, Eun Ju; Hong, Yong Kook; Choe, Kyu Ok [Yonsei Univ. College of Medicine, Seoul (Korea, Republic of)

1999-01-01

To analyse the causes the radiologic findings in patients with mediastinitis and to evaluate the efficacy of chest CT scanning in patients with delayed diagnosis. Seventeen patients with histopathologically(n=15) or clinically diagnosed(n=2) mediastinitis were involved in this study. Eleven of the former group underwent surgery, and in four, tube drainage was performed. All underwent chest radiography and CT scanning, and in seven patients, the causes of delayed diagnosis were analysed. The most common cause of mediastinitis was esophageal rupture(n=11). Others were extension from neck abscess to the mediastinum(n=3), complications after a Benthall procedure(n=1), tuberculous lymphadenitis(n=1) and mycotic aneurysm(n=1). Patients with esophageal rupture suffered from underlying diseases such as esophageal cancer(n=2), iatrogenic esophageal rupture(n=2), Boerhaave's syndrome(n=2), and esophagitis(n=1). In patients with neck abscess (n=3), each was secondary to infected cystic hygroma, Ludwig angina, or deep neck infection, respectively. On chest CT, patients with esophageal rupture(n=11) had an abscess in the posterior mediastinum ; nine abscesses extended to the cervical area along the retropharyngeal space, and the patient with Ludwig angina had an abscess involving all compartments of the mediastinum. Among the total of 17 patients, diagnostic delays were found in seven, while five had spontaneous esophageal ruptures and two suffered complications after a Benthall procedure and Tbc lymphadenitis, respectively. The causes of diagnostic delay varied. Among seven patients, pnevmonia was initially diagnosed in two, who were treated ; one had multiorgan failure, and one was suffering from pericardial effusion and lung abscess. In three other patients, chest radiographs initially showed non-specific findings, leading to delayed CT examination. The most common cause of mediastinitis was esophageal rupture, and in these patients, chest radiographs and clinical

Findings chest radiograph and CT in mediastinitis: effcacy of CT in patients with delayed diagnosis

International Nuclear Information System (INIS)

Son, Eun Ju; Hong, Yong Kook; Choe, Kyu Ok

1999-01-01

To analyse the causes the radiologic findings in patients with mediastinitis and to evaluate the efficacy of chest CT scanning in patients with delayed diagnosis. Seventeen patients with histopathologically(n=15) or clinically diagnosed(n=2) mediastinitis were involved in this study. Eleven of the former group underwent surgery, and in four, tube drainage was performed. All underwent chest radiography and CT scanning, and in seven patients, the causes of delayed diagnosis were analysed. The most common cause of mediastinitis was esophageal rupture(n=11). Others were extension from neck abscess to the mediastinum(n=3), complications after a Benthall procedure(n=1), tuberculous lymphadenitis(n=1) and mycotic aneurysm(n=1). Patients with esophageal rupture suffered from underlying diseases such as esophageal cancer(n=2), iatrogenic esophageal rupture(n=2), Boerhaave's syndrome(n=2), and esophagitis(n=1). In patients with neck abscess (n=3), each was secondary to infected cystic hygroma, Ludwig angina, or deep neck infection, respectively. On chest CT, patients with esophageal rupture(n=11) had an abscess in the posterior mediastinum ; nine abscesses extended to the cervical area along the retropharyngeal space, and the patient with Ludwig angina had an abscess involving all compartments of the mediastinum. Among the total of 17 patients, diagnostic delays were found in seven, while five had spontaneous esophageal ruptures and two suffered complications after a Benthall procedure and Tbc lymphadenitis, respectively. The causes of diagnostic delay varied. Among seven patients, pnevmonia was initially diagnosed in two, who were treated ; one had multiorgan failure, and one was suffering from pericardial effusion and lung abscess. In three other patients, chest radiographs initially showed non-specific findings, leading to delayed CT examination. The most common cause of mediastinitis was esophageal rupture, and in these patients, chest radiographs and clinical symptoms

Challenges in the prenatal and post-natal diagnosis of mediastinal cystic hygroma: a case report

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Nazir Sarfraz

2008-08-01

Full Text Available Abstract Introduction Cystic hygroma is a benign congenital neoplasm that mostly presents as a soft-tissue mass in the posterior triangle of the neck. Pure mediastinal lesions are uncommon; the vast majority are asymptomatic and are an incidental finding in adulthood. The diagnosis is often made intra- or postoperatively. Prenatal identification is exceptional and post-natal diagnosis also proves challenging. Case presentation We report one such case that was mistaken for other entities in both the prenatal and immediate post-natal period. Initial and follow-up antenatal ultrasound scans demonstrated a multicystic lesion in the left chest, and the mother was counselled about the possibility of her baby having a congenital diaphragmatic hernia. Initial post-natal chest radiographs were reported as normal. An echocardiogram and thoracic computed tomography scan confirmed a complex multiloculated cystic mediastinal mass. The working diagnoses were of a mediastinal teratoma or congenital cystic adenomatous malformation. At operation, the lesion was compressed by the left lung and was found to be close to the left phrenic nerve, which was carefully identified and preserved. After excision, histopathological examination of the mass confirmed the diagnosis of cystic hygroma. Postoperative dyspnoea was observed secondary to paradoxical movement of the left hemidiaphragm and probable left phrenic neuropraxia. This settled conservatively with excellent recovery. Conclusion Despite the fact that isolated intrathoracic cystic hygroma is a rare entity, it needs to be considered in the differential diagnosis of foetal and neonatal mediastinal masses, particularly for juxtadiaphragmatic lesions. The phrenic nerve is not identifiable on prenatal ultrasound imaging, and it is therefore understandable that a mass close to the diaphragm may be mistaken for a congenital diaphragmatic hernia because of the location, morphology and potential phrenic nerve compression

Free Mediastinal Foreign Bodies: 5-year Experience and Review of ...

African Journals Online (AJOL)

Free Mediastinal Foreign Bodies: 5-year Experience and Review of Literature. M O Thomas ... need for public enlightenment against such practice. The evolving world of endoscopic surgery throws a challenge towards the future management of these types of cases. We need to do more in this part of the world. NQJHM Vol.

Harlequin Syndrome Following Resection of Mediastinal Ganglioneuroma

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Yeong Jeong Jeon

2017-04-01

Full Text Available Harlequin syndrome is a rare disorder of the sympathetic nervous system characterized by unilateral facial flushing and sweating. Although its etiology is unknown, this syndrome appears to be a dysfunction of the autonomic nervous system. To the best of our knowledge, thus far, very few reports on perioperative Harlequin syndrome after thoracic surgery have been published in the thoracic surgical literature. Here, we present the case of a 6-year-old patient who developed this unusual syndrome following the resection of a posterior mediastinal mass.

[Prognostic significance of mediastinal involvement and post-therapeutic radiographic changes in the intrathoracic area in Hodgkin's disease].

Science.gov (United States)

Melínová, L; Dienstbier, Z; Zámecník, J; Hermanská, Z; Smakal, S; Chytrý, P; Maríková, E

1990-10-19

The prognostic importance of mediastinal affection and its extent was analyzed in a group of 220 patients with Hodgkin's disease in all clinical stages. The results of the total survival period in mediastinal patients are significantly worse, as compared with patients without primary affection of the mediastinum at all evaluated time intervals: in the 5th year after onset of treatment 79% vs. 95% in the 10th, 15th and 20th year 67% vs 86%, 63% vs. 86% and 56% vs. 86%. The survival of patients without a mediastinal tumour does not change after a 10-year period of follow-up, in case of a tumour mass up to 1/3 of the transverse chest diameter it declines from 81% in the 5th year to 59 and to 49% in the 10th and 15th year. In case of extensive mediastinal affection only 61% survive 5 years and 42% survive after 10 years. The differences in survival without signs of the disease are not statistically significant, obviously due to primary radiochemotherapy with alternation of cytostatic combinations. There are no significant differences in the frequency of posttherapeutic X-ray changes in the mediastinal area after primary X-ray therapy alone and after chemotherapy alone, as compared with combined radio-chemotherapy with the incidence of postirradiation changes in 30% of the patients: the incidence of post-irradiation changes is potentiated by the administration of bleomycin, depending on the dose. For evaluation of posttherapeutic X-ray changes in the area of the chest it is essential to monitor the patients by X-ray check-ups with concurrent functional examination of the lungs.

Histopathologic Overlap between Fibrosing Mediastinitis and IgG4-Related Disease

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Tobias Peikert

2012-01-01

Full Text Available Fibrosing mediastinitis (FM and IgG4-related disease (IgG4-RD are two fibroinflammatory disorders with potentially overlapping clinical and radiological features. In this paper, we looked for histopathologic features of IgG4-RD and enumerated infiltrating IgG4-positive plasma cells within mediastinal tissue biopsies from FM patients. We identified 15 consecutive FM surgical mediastinal tissue biopsies between 1985 and 2006. All patients satisfied the clinical and radiological diagnostic criteria for FM. All patients had either serological or radiological evidence of prior histoplasmosis or granulomatous disease, respectively. Formalin-fixed paraffin-embedded tissue sections of all patients were stained for H&E, IgG, and IgG4. Three samples met the predefined diagnostic criteria for IgG4-RD. In addition, characteristic histopathologic changes of IgG4-RD in the absence of diagnostic numbers of tissue infiltrating IgG4-positive plasma cells were seen in a number of additional cases (storiform cell-rich fibrosis in 11 cases, lymphoplasmacytic infiltrate in 7 cases, and obliterative phlebitis/arteritis in 2 cases. We conclude that up to one-third of histoplasmosis or granulomatous-disease-associated FM cases demonstrate histopathological features of IgG4-RD spectrum. Whether these changes occur as the host immune response against Histoplasma or represent a manifestation of IgG4-RD remains to be determined. Studies to prospectively identify these cases and evaluate their therapeutic responses to glucocorticoids and/or other immunosuppressive agents such as rituximab are warranted.

LA REFORESTACION CON QUEBRACHO COLORADO Y ALGUNAS NORMAS SILVICOLAS RELACIONADAS CON SU APROVECHAMIENTO RACIONAL

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José Antonio Valentini

1960-01-01

Full Text Available El presente trabajo se relaciona con la reforestación artificialdel quebracho colorado chaqueño, en la zona húmeda del parque chaqueño y las posibilidades de regeneración natural de sus masas, estableciéndose la etapa de la hidrosere más conveniente para su instalación.Se determinan, en base a experiencias recientes, realizadas en establecimientos dependientes de la Administración Nacional de Bosques, los métodos silvícolas más convenientes para su conducción, cortas a clareos sucesivos y tala rasa en fajas alternas, siendo necesaria en la mayoría de los casos, la repoblación por siembra directa o plantación, por falta de portagranos.Los factores limitantes del desarrollo de los quebrachales másimportantes son: las quemas de los campos, el ramoneo y pisoteo de los animales y las heladas y los golpes de sol

Relación del índice de masa corporal con felicidad, autoestima y depresión en adultos jóvenes

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Graciela Cristina Avitia

2018-01-01

Full Text Available La obesidad es una enfermedad con repercusión psicológica, por lo que es importante reconocer los rasgos psicológicos y de comportamiento de quienes la padecen. El objetivo de este trabajo es analizar los niveles de felicidad, autoestima y depresión en individuos con normopeso (NP y con sobrepeso/obesidad (SO. La muestra estuvo constituida por 151 alumnos de la Universidad Autónoma de Ciudad Juárez (UACJ con una media de edad de 21.44 años. Los resultados mostraron que el grupo de SO tuvo puntuaciones significativamente más elevadas en sentido positivo de la vida y realización personal, en comparación con el grupo de NP. Sin embargo, no se encontraron diferencias significativas en autoestima y depresión. Estos resultados no coinciden con los de otras investigaciones y podrían ser explicados por el grado de aceptación en el entorno social hacia las personas con obesidad, las estrategias de afrontamiento y la prevalencia de obesidad y sobrepeso entre otras variables con las que se ha asociado la relación obesidad/infelicidad.

Exploring the Bacterial Microbiota of Colombian Fermented Maize Dough "Masa Agria" (Maiz Añejo).

Science.gov (United States)

Chaves-Lopez, Clemencia; Serio, Annalisa; Delgado-Ospina, Johannes; Rossi, Chiara; Grande-Tovar, Carlos D; Paparella, Antonello

2016-01-01

Masa Agria is a naturally fermented maize dough produced in Colombia, very common in the traditional gastronomy. In this study we used culture-dependent and RNA-based pyrosequencing to investigate the bacterial community structure of Masa Agria samples produced in the south west of Colombia. The mean value of cell density was 7.6 log CFU/g of presumptive lactic acid bacteria, 5.4 log cfu/g for presumptive acetic bacteria and 5.6 og CFU/g for yeasts. The abundance of these microorganisms is also responsible for the low pH (3.1-3.7) registered. Although the 16S rRNA pyrosequencing revealed that the analyzed samples were different in bacteria richness and diversity, the genera Lactobacillus, Weissella, and Acetobacter were predominant. In particular, the most common species were Lactobacillus plantarum and Acetobacter fabarum, followed by L. fermentum, L. vaccinostercus, and Pediococcus argentinicus. Several microorganisms of environmental origin, such as Dechloromonas and most of all Sphingobium spp., revealed in each sample, were detected, and also bacteria related to maize, such as Phytoplasma. In conclusion, our results elucidated for the first time the structures of the bacterial communities of Masa Agria samples obtained from different producers, identifying the specific dominant species and revealing a complete picture of the bacterial consortium in this specific niche. The selective pressure of tropical environments may favor microbial biodiversity characterized by a useful technological potential.

Mediastinal and hilar lymphadenopathy: cross-referenced anatomy on axial and coronal images displayed by using multi-detector row CT

International Nuclear Information System (INIS)

Lee, Ju Hyun; Lee, Kyung Soo; Kim, Tae Sung; Yi, Chin A; Cho, Jae Min; Lee, Min Hee

2003-01-01

The accurate evaluation of mediastinal and pulmonary hilar lymphadenopathy, especially in patients with lung cancer, is important for determining treatment options and evaluating the response to therapy. To indicate nodal location in detail, mediastinal and hilar lymph nodes have been assigned to one of 14 nodal stations. Mediastinal nodes of greater than 10 mm short-axis diameter are regarded as abnormal, irrespective of their nodal station, while hilar nodes are considered abnormal if their diameter is greater than 10 mm in any axis or they are convex compared to surrounding lung. By providing multiplanar images, multi-detector row CT allows detailed evaluation of thoracic anatomic structures more easily than in the past, when axial images only were available. At cross-referenced imaging, a lymph node depicted at axial imaging in one anatomical location can be visualized simultaneously and automatically at coronal imaging at the exactly corresponding anatomical location. Cross-referenced coincidental axial and coronal images help assess both the size and morphology of mediastinal and hilar lymph nodes

Relación del consumo de productos para bajar de peso con el sobrepeso y la obesidad en profesores universitarios de Puebla, México

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Laura Guadalupe Ceja Ramirez

2015-01-01

Full Text Available Introducción: Las tendencias de obesidad y sobrepeso en México muestran un significativo incremento en las últimas encuestas nacionales, lo cual se ve reflejado en el incremento de las  enfermedades crónicas no transmisibles, además de mayor consumo de productos para bajar de peso. Objetivos: Encontrar la relación entre el consumo de productos adelgazantes con el sobrepeso y la obesidad en profesores de una universidad privada de Puebla, México. Materiales y métodos: Se realizó un diseño no experimental, transversal  descriptivo, utilizando un muestreo probabilístico aleatorio simple, en el que participaron 100 profesionistas de los cuales 27 fueron hombres y 73 mujeres. Se aplicó un cuestionario para conocer los hábitos, el consumo de productos para bajar de peso, además de mostrárseles modelos anatómicos que determinaron la percepción de la persona con su cuerpo. Finalmente se realizó la medición antropométrica, obteniendo el cálculo de su índice de masa corporal (IMC. Resultados: El 45% de las personas involucradas presentan sobrepeso y obesidad; 38%  consume productos para bajar de peso, siendo el 84.2% mujeres; entre mayor índice de masa corporal (IMC mayor consumo de productos para bajar de peso (p<0.05. Se observa una relación inversa entre mayor obesidad y menor número de comidas al día, a la par con menor número de horas de ejercicio y finalmente la mayoría de las personas con sobrepeso se perciben con un IMC mayor. Conclusión: El consumo de productos para bajar de peso se relaciona con el incremento del sobrepeso y la obesidad en los profesionistas.

Evaluación de la espectrometría de masas: MALDI-TOF MS para la identificación rápida y confiable de levaduras

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María S Relloso

2015-06-01

Full Text Available La espectrometría de masas, conocida como matrix-assisted laser desorption/ionization time-of-flight mass spectrometry (MALDI-TOF MS, es una técnica utilizada en la identificación de microorganismos mediante la creación de un espectro basado en el perfil de proteínas, que es único para una especie dada. El objetivo del presente trabajo fue evaluar la identificación de aislamientos clínicos de levaduras por MALDI-TOF MS en un hospital universitario de Argentina y analizar 2 procedimientos para la extracción de proteínas: el recomendado por el fabricante del equipo y una técnica abreviada rápida. Utilizando el primero de estos procedimientos se analizaron 201 aislamientos identificados previamente por métodos convencionales y se obtuvo coincidencia en la identificación a nivel de especie en el 95,38 % de los aislamientos analizados. Con 100 de estos aislamientos se utilizó, además, el procedimiento abreviado para la extracción de proteínas; se obtuvo una identificación correcta a nivel de género y especie en el 98,0 % de ellos. La espectrometría de masas MALDI-TOF MS demostró ser una técnica rápida, sencilla y precisa para la identificación de levaduras.

Ecoprep: la preparación rentable de masas cerámicas

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Gerl, S.

2012-04-01

Full Text Available Ecoprep (Economic Preparation is the sustainable technology for preparing ceramic bodies with a minimum consumption of resources. It has a huge impact on the energy balance and eliminates the need for additives to generate a high-quality slip to make granules. In consequence Ecoprep delivers a significant reduction in production costs, bringing an investment in this technology to the break-even point after a very short time. Reduction in water consumption and additives and the use of new raw materials are other advantages that impulse the implementation of this production technology, as well as important reduction of CO2 emissions, contributing to meeting the goals of the Kyoto Protocol. In short: A technology already successfully applied in different industries for decades, that includes a compendium of measures based on saving reductions in a range from 66% (energy, water,… and 100% (additives, deflocculants, etc. and will mark the future in microgranulation processes also in the ceramic industry.

Ecoprep (Economic Preparation es una tecnología para la preparación de masas cerámicas con un consumo mínimo de recursos. El balance de energía es afectado en gran medida, de forma que ya no se requieren aditivos para producir una barbotina de alta calidad con el único fin de obtener un granulado. De ésta forma, Ecoprep ofrece una reducción considerable de los costes de producción que permite la rápida amortización de la inversión en ésta tecnología. Reducción en consumo de agua y aditivos así como la utilización de nuevas materias primas son otras ventajas que impulsan la implantación de ésta novedosa tecnología de producción, así como una importante reducción en emisiones de CO2, contribuyendo así al cumplimiento de las metas del protocolo de Kyoto. En resumen: Una tecnología aplicada ya con éxito en diferentes industrias desde hace décadas, que incluye un compendio de medidas de ahorro basado en

Estadificación y valoración mediastínica del cáncer del pulmón Staging and mediastinal assessment of lung cancer

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Miguel Emilio García Rodríguez

2010-12-01

Full Text Available El cáncer de pulmón se considera la más letal de las neoplasias, tanto en los hombres como en las mujeres, y supera la suma de todas las muertes por cáncer de colon, próstata y mama. En el momento del diagnóstico más del 40 % de los pacientes tienen una enfermedad localmente avanzada, en la que las posibilidades de curación son escasas y la supervivencia a los 5 años es de apenas un 15 %. La estadificación de la enfermedad, así como la valoración mediastínica es crucial para realizar un tratamiento correcto, establecer pronósticos y realizar investigaciones que conlleven a una conducta adecuada ante estos pacientes. Con el objetivo de actualizar el tema se realizó una revisión en varias bases de datos en inglés: Pubmed, Medline y Ebsco, utilizando las palabras clave: lung cancer staging, mediastinal lymphonode excision y lung carcinoma.The lung cancer is considered the most lethal of neoplasias both in men and women and it is the highest figure of all death by colon, prostate and breast deaths. At diagnosis more than the 40% of patients have a locally advanced disease with scarce possibilities of cure and the 5-years survival is hardly of a 15%. Disease's staging as well as the mediastinal assessment is crucial to a proper diagnosis, to establish prognoses and the carry out researches leading to a appropriate behavior in these cases. The objective of present paper was to update on this subject authors made search in some databases in English language: Pubmed, Medline and Ebsco, using lung cancer staging, mediastinal lymphonode excision and lung carcinoma as key words.

Seguimiento longitudinal de la masa ósea en mujeres postmenopáusicas en función de los polimorfismo BSMI y APAI del gen del receptor de la vitamina D (VDR)

OpenAIRE

Pedrera Canal, María

2015-01-01

La Osteoporosis es una condición poligénica que está determinada por la influencia de diversos genes, cada uno de los cuales tiene un efecto modesto sobre la masa ósea. El objetivo del presente trabajo de tesis doctoral fue determinar como los polimorfismos del gen receptor de la vitamina D (BsmI y ApaI) están asociados con la densidad mineral ósea (DMO), los valores de DMO en mujeres osteoporóticas y la respuesta al tratamiento en mujeres osteoporóticas postmenopáusicas españolas. Un total d...

Negative EBUS-TBNA Predicts Very Low Prevalence of Mediastinal Disease in Staging of Non-Small Cell Lung Cancer.

Science.gov (United States)

Taverner, John; Cheang, Mun-Yoong; Antippa, Phillip; See, Katharine; Irving, Louis B; Steinfort, Daniel P

2016-04-01

Confirmation of mediastinal disease (N2/3) in non-small cell lung cancer (NSCLC) generally precludes curative surgical management. Endobronchial ultrasound-guided transbronchial needle aspiration (EBUS-TBNA) has become a routine first test in mediastinal staging of NSCLC; however, it remains unclear whether a negative EBUS-TBNA should be followed by mediastinoscopy before proceeding to surgery. Understanding the prevalence of metastases in lymph nodes with benign findings on EBUS-TBNA will inform decision making following negative EBUS-TBNA. We examined a retrospective cohort of patients who underwent EBUS-TBNA before resection with mediastinal lymph node sampling for NSCLC between December 2009 and June 2014 in 3 hospitals in Melbourne, Australia. All patients had integrated positron emission tomography/computed tomography (PET/CT) before EBUS-TBNA. Eighty-two matched mediastinal lymph node stations were sampled in 57 patients by both EBUS-TBNA and surgical resection, 47 nodes in patients staged cN0/1 by PET/CT and 35 nodes in patients staged cN2/3. All patients had a negative EBUS-TBNA. Four malignant nodes were identified surgically (4.9% of lymph nodes). The mean size of malignant deposits was 5.5 mm. Per-node negative predictive value was 78/82=0.95. All malignant nodes were located in patients with moderate-high risk disease (cN2/3), giving a disease prevalence in cN2/3 patients of 11%, and 0% in cN0/1. In patients staged cN2, per-node NVP was 0.89. The prevalence of mediastinal nodal disease following negative EBUS-TBNA is very low, at 4.9%. The per-node NVP of EBUS-TBNA is 0.95, decreasing to 0.89 in moderate-high risk patients. We suggest that a negative EBUS-TBNA of mediastinal nodes does not need to be confirmed by mediastinoscopy of those nodal stations, regardless of PET/CT findings.

Mediastinal lymphadenopathy and pulmonary arterial hypertension in mixed connective tissue disease

International Nuclear Information System (INIS)

Guit, G.L.; Shaw, P.C.; Ehrlich, J.; Kroon, H.M.; Oudkerk, M.

1985-01-01

A case of mixed connective tissue disease (MCTD) is presented in which mediastinal lymphadenopathy was the most prominent radiological finding detected by plain chest radiographs and computed tomography. Pulmonary arterial hypertension, which is a rare and often fatal complication of MCTD, also developed in this patient

Mediastinal and extrapleural fat hypertrophy in idiopathic pulmonary fibrosis on high-resolution CT: comparison with normal individuals

International Nuclear Information System (INIS)

Son, Kyu Ri; Lee, Hyun Ju; Lim, Kun Young; Lee, Chang Hyun; Goo, Jin Mo; Im, Jung Gi

2004-01-01

We wished to compare the amount of mediastinal and extrapleural fat on high resolution CT for patients with idiopathic pulmonary fibrosis (IPF) with that of normal individuals, and we wished to evaluate the correlation between the amount of fat and the degree of pulmonary fibrosis. We selected a group of 25 patients with radiologically and clinically diagnosed IPF and we also selected another group of 25 age and gender-matched patients having no abnormalities on pulmonary function testing as well as HRCT as controls from our radiologic database search (mean age: 59 years, M:F= 11:14). We measured the area of mediastinal and extrapleural fat at the levels of the aortic arch and at the origin of the right pulmonary artery and right inferior pulmonary vein on three sections of HRCT by using software (Rapidia; 3DMED, Seoul, Korea). The total amount of fat was calculated by summing up the areas of the mediastinal and extrapleural fat, which is corrected by the body mass index; we also evaluated statistical differences between the two groups. At same sections of CT, the ratio (%) of the honeycombing area to the total areas of the lung was calculated. We evaluated the relationship between the amount of extrapleural or mediastinal fat with the ratio (%) of the honeycombing area. The total amount of fat in patients with IPF and normal individuals were 67.24±19.03 cm 2 and 32.55±11.91 cm 2 , respectively. The fat amount corrected by body mass index was 280.48±74.43 mm 2 /kg/m 2 in the IPF patients and 137.06±41.76 mm 2 /kg/m 2 in normal individuals. The differences between two groups for the total amount of fat and fat amount, as corrected for by the body mass index, were statistically significant (p<0.0001). The ratio (%) of the honeycombing area and the total amount of fat showed a moderate correlation (rho= 0.43, p=0.032). Patients with IPF have a larger amount of mediastinal and extrapleural fat than normal individuals. The hypertrophy of mediastinal and extrapleural

Mediastinal and extrapleural fat hypertrophy in idiopathic pulmonary fibrosis on high-resolution CT: comparison with normal individuals

Energy Technology Data Exchange (ETDEWEB)

Son, Kyu Ri; Lee, Hyun Ju; Lim, Kun Young; Lee, Chang Hyun; Goo, Jin Mo; Im, Jung Gi [College of Medicine, Seoul National Univ., Seoul (Korea, Republic of)

2004-12-01

We wished to compare the amount of mediastinal and extrapleural fat on high resolution CT for patients with idiopathic pulmonary fibrosis (IPF) with that of normal individuals, and we wished to evaluate the correlation between the amount of fat and the degree of pulmonary fibrosis. We selected a group of 25 patients with radiologically and clinically diagnosed IPF and we also selected another group of 25 age and gender-matched patients having no abnormalities on pulmonary function testing as well as HRCT as controls from our radiologic database search (mean age: 59 years, M:F= 11:14). We measured the area of mediastinal and extrapleural fat at the levels of the aortic arch and at the origin of the right pulmonary artery and right inferior pulmonary vein on three sections of HRCT by using software (Rapidia; 3DMED, Seoul, Korea). The total amount of fat was calculated by summing up the areas of the mediastinal and extrapleural fat, which is corrected by the body mass index; we also evaluated statistical differences between the two groups. At same sections of CT, the ratio (%) of the honeycombing area to the total areas of the lung was calculated. We evaluated the relationship between the amount of extrapleural or mediastinal fat with the ratio (%) of the honeycombing area. The total amount of fat in patients with IPF and normal individuals were 67.24{+-}19.03 cm{sup 2} and 32.55{+-}11.91 cm{sup 2}, respectively. The fat amount corrected by body mass index was 280.48{+-}74.43 mm{sup 2}/kg/m{sup 2} in the IPF patients and 137.06{+-}41.76 mm{sup 2}/kg/m{sup 2} in normal individuals. The differences between two groups for the total amount of fat and fat amount, as corrected for by the body mass index, were statistically significant (p<0.0001). The ratio (%) of the honeycombing area and the total amount of fat showed a moderate correlation (rho= 0.43, p=0.032). Patients with IPF have a larger amount of mediastinal and extrapleural fat than normal individuals. The

Matemática y Publicidad: Una experiencia con datos reales

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Danilo Díaz Levicoy

2016-04-01

Full Text Available En este artículo se presentan los resultados de una experiencia de aula, con estudiantes de secundaria, centrado en análisis del Índice de Masa Corporal (IMC de los estudiantes de un colegio chileno y la creación de afiches publicitarios a partir de esta información. Entre los resultados se destacan: la importancia de innovar en la enseñanza de la matemática; los proyectos estadísticos como elementos que favorecen el aprendizaje y el trabajo en equipo; la aplicabilidad de la matemática en la creación de publicidad; la potenciación de habilidades no matemáticas.

Alteracion del Metabolismo Oseo y su Relacion con el Tratamiento Ortodontico en el Paciente Osteoporotico

OpenAIRE

Guercio de Dinatale, Elisabetta

2000-01-01

La osteoporosis ha sido definida como una enfermedad sistémica esquelética, caracterizada por una disminución de la masa ósea y deterioro de la microarquitectura del tejido óseo, con un consecuente incremento en la fragilidad y susceptibilidad a fracturas. La relación entre osteoporosis y pérdida ósea alveolar ha sido claramente establecida. Sin embargo, han sido pocos los estudios que determinan los efectos de la osteoporosis sobre el movimiento dentario ortodóntico. Es sabido que el movimie...

{sup 18}F-FDG uptake on PET in primary mediastinal non-thymic neoplasm: A clinicopathological study

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Kaira, Kyoichi, E-mail: kkaira1970@yahoo.co.jp [Division of Thoracic Oncology, Shizuoka Cancer Center, 1007 Shimonagakubo Nagaizumi-cho, Sunto-gun, Shizuoka 411-8777 (Japan); Abe, Masato [Division of Pathology, Shizuoka Cancer Center, 1007 Shimonagakubo Nagaizumi-cho, Sunto-gun, Shizuoka 411-8777 (Japan); Nakagawa, Kazuo; Ohde, Yasuhisa; Okumura, Takehiro [Division of Thoracic Surgery, Shizuoka Cancer Center, 1007 Shimonagakubo Nagaizumi-cho, Sunto-gun, Shizuoka 411-8777 (Japan); Takahashi, Toshiaki; Murakami, Haruyasu; Shukuya, Takehito; Kenmotsu, Hirotsugu; Naito, Tateaki [Division of Thoracic Oncology, Shizuoka Cancer Center, 1007 Shimonagakubo Nagaizumi-cho, Sunto-gun, Shizuoka 411-8777 (Japan); Hayashi, Isamu [Division of Pathology, Shizuoka Cancer Center, 1007 Shimonagakubo Nagaizumi-cho, Sunto-gun, Shizuoka 411-8777 (Japan); Oriuchi, Noboru [Department of Diagnostic Radiology and Nuclear medicine, Gunma University Graduate School of Medicine, Showa-machi, Maebashi 371-8511, Gunma (Japan); Endo, Masahiro [Division of Diagnostic Radiology, Shizuoka Cancer Center, 1007 Shimonagakubo Nagaizumi-cho, Sunto-gun, Shizuoka 411-8777 (Japan); Kondo, Haruhiko [Division of Thoracic Surgery, Shizuoka Cancer Center, 1007 Shimonagakubo Nagaizumi-cho, Sunto-gun, Shizuoka 411-8777 (Japan); Nakajima, Takashi [Division of Pathology, Shizuoka Cancer Center, 1007 Shimonagakubo Nagaizumi-cho, Sunto-gun, Shizuoka 411-8777 (Japan); Yamamoto, Nobuyuki [Division of Thoracic Oncology, Shizuoka Cancer Center, 1007 Shimonagakubo Nagaizumi-cho, Sunto-gun, Shizuoka 411-8777 (Japan)

2012-09-15

Background: The usefulness of 2-[{sup 18}F]-fluoro-2-deoxy-D-glucose ({sup 18}F-FDG) positron emission tomography (PET) has been investigated in thymic epithelial tumors. However, little is known about PET imaging of {sup 18}F-FDG in primary non-thymic mediastinal neoplasms. The aim of this study is to explore the clinicopathological significance of {sup 18}F-FDG PET in primary mediastinal (non-thymic) neoplasms. Methods: Twenty-one patients with mediastinal neoplasms who underwent {sup 18}F-FDG PET before treatment were included in this study. Tumor sections were stained by immunohistochemistry for glucose transporter 1 (Glut1); glucose transporter 3 (Glut3); hypoxia-inducible factor-1 alpha (HIF-1α); hexokinase I; vascular endothelial growth factor (VEGF); microvessels (CD34); epidermal growth factor receptor (EGFR); Akt/mTOR signaling pathway (p-Akt and p-mTOR); cell cycle control (p53). Results: Seventeen of 21 patients were imaged on PET system using {sup 18}F-FDG, but 4 patients with a histology of cyst showed nothing abnormal in PET scans. The histology of the resected tumors was as follows: 6 schwannoma, 3 teratoma, 4 cyst, 3 sarcoma, 1 undifferentiated carcinoma, 1 seminoma, 1 mediastinal goiter, 1 ganglioneuroma, and 1 Hodgkin lymphoma. {sup 18}F-FDG uptake was significantly correlated with Glut1, HIF-1α, EGFR, p-Akt and p-S6K. These biomarkers were highly expressed in schwannoma, teratoma and high grade malignancies, whereas all patients with cyst and ganglioneuroma had no positive expression of these biomarkers. High uptake of {sup 18}F-FDG was significant associated with Glut1, VEGF, EGFR, p-Akt, p-S6K and tumor maximal size. Conclusion: The amount of {sup 18}F-FDG uptake in primary mediastinal non-thymic neoplasms is determined by the presence of glucose metabolism (Glut1), hypoxia (HIF-1α) and upstream components of HIF-1α (EGFR, p-Akt and p-S6K)

How can sentinel navigation surgery abbreviate mediastinal lymph node dissection for lung cancer?

International Nuclear Information System (INIS)

Nomori, Hiroaki; Ohtsuka, Takashi; Naruke, Tsuguo; Suemasu, Keiichi

2004-01-01

Sentinel nodes (SNs) were examined for 101 patients who had peripheral type non-small cell lung cancer less than 5 cm and had undergone systemic mediastinal lymph node dissection. The surgical procedure was lobectomy in 91, pneumonectomy in 3, and segmentectomy with lymph node dissection in 7. In the CT room, the site for RI injection was marked on the skin, and the angle and depth of the needle required to reach the peritumoral region was determined. The RI was then injected in the RI room. The radioactivity in the lymph nodes was counted before dissection (in vivo counting), and after dissection that (ex vivo counting). SNs were defined as any node for which the count was ≥10 times than the background count. SN identification was finally based on ex vivo data. Of the 101 patients, SNs could be identified in 80 patients (80%). Patients whose SNs could not be identified had a significantly lower forced expiratory volume in one second/forced vital capacity (FEV 1 /FVC) than those with identifiable SNs (p=0.025). Twenty six patients (33%) had SN in the mediastinum, the distribution of which depended on the lobe, ie the No.4 lymph node station in the right upper lobe, the No.4 in the right middle lobe, the No.4 and 7 in the right lower lobe, the No.5 in the left upper lobe, and the No.7 in the left lower lobe. One false negative SN was detected in 25 patients with N 1 or N 2 disease (4%). In vivo and ex vivo counting showed 73% concurrence for the identification of SNs in mediastinal lymph node stations, of which rate was significantly higher than 40% in hilar lymph node stations (p 1 /FVC, such as those with chronic obstructive pulmonary disease. The in vivo identification of mediastinal SNs was reliable as much as the ex vivo. Therefore, the in vivo identification of SNs in the mediastinum could be useful approach to guide mediastinal lymph node sampling or dissection. (author)

Multivariate analysis of various factors affecting background liver and mediastinal standardized uptake values

International Nuclear Information System (INIS)

Kuruva, Manohar; Mittal, Bhagwant Rai; Abrar, Mohammed Labeeb; Kashyap, Raghava; Bhattacharya, Anish

2012-01-01

Standardized uptake value (SUV) is the most commonly used semi-quantitative PET parameter. Various response assessment criteria grade the tumor uptake relative to liver or mediastinal uptake. However various factors can affect the background SUV values. This prospective study was carried out to assess the variability of liver and mediastinal SUVs normalized to lean body mass (SUL-L, SUL-M), body surface area (SUB-L, SUB-M), and body weight (SUW-L, SUW-M) and their dependence on various factors which can affect SUV values. Eighty-eight patients who underwent F-18 FDG PET/CT for various oncological indications were prospectively included in this study. SUVs of liver and mediastinum were calculated by ROIs drawn as suggested by Wahl, et al., in PERCIST 1.0 criteria. Multivariate linear regression analysis was done to assess for the various factors influencing the SUVs of liver and mediastinum. Factors assessed were age, sex, weight, blood glucose level, diabetic status, and uptake period. A P value less than 0.01 was considered significant. SUL-L, SUL-M, SUB-L, SUB-M, SUW-L, SUW-M were not affected significantly by age, sex, blood glucose levels, diabetic status. The uptake period had a statistically significant effect on SUL-L (P = 0.007) and SUW-L (P = 0.008) with a progressive decrease with increasing uptake time. Body weight showed a statistically significant effect on SUW-L (P = 0.001) while SUL-L and SUB-L were not dependent on weight. SUB-L was least dependent on weight (P = 0.851) when compared with SUL-L (P = 0.425). However SUL-L was also not affected statistically significantly by variations in body weight (P = 0.425). Mediastinal SUVs were not significantly affected by any of the factors. As mediastinal SUVs are not affected significantly by any of the factors, it can be considered as background when wide variations occur in uptake times or weight of the patient when comparing two PET/CT studies to evaluate response

PENYUSUNAN SKENARIO MASA TANAM BERDASARKAN PRAKIRAAN CURAH HUJAN DI SENTRA PRODUKSI PANGAN

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Woro Estiningtyas

2008-11-01

Penggunaan model deterministik untuk prediksi curah hujan di daerah tropik yang faktor determinannya sangat komplek, dinamis dan acak sangat rumit. Oleh karena itu diperlukan model statistik yang dapat diperbarui secara real time. Filter Kalman menggabungkan pendekatan model fisik dan statistik menjadi model stokastik yang dapat diperbarui setiap saat untuk tujuan peramalan segera (on line forecasting. Validasi model yang menghubungkan curah hujan dan suhu permukaan laut Nio 3.4 menghasilkan nilai koefisien korelasi lebih dari 75%. Artinya model prediksi dengan Filter Kalman ini dapat digunakan untuk memprakirakan curah hujan bulanan dan diaplikasikan untuk penyusunan masa tanam. Selama ini neraca air tanaman dihitung berdasarkan pola curah hujan setempat, namun dengan meningkatnya intensitas dan frekuensi anomali iklim akan menyebabkan hasil komputasi neraca air harus diperbarui setiap saat melalui penyusunan masa tanam yang memperhitungkan aspek prediksi. Prakiraan curah hujan dengan metode Filter Kalman menghasilkan nilai koefisien korelasi validasi 48-92%. Hasil skenario pola tanam berdasarkan data prediksi curah hujan memperlihatkan bahwa ditemukan periode-periode dengan persentase kehilangan hasil lebih dari 20%, terutama pada lokasi dengan distribusi curah hujan yang tidak merata sepanjang tahun. Dengan demikian tidak disarankan untuk melakukan penanaman pada periode tersebut. Lokasi Sukamandi memperlihatkan karakteristik model yang lebih bagus dibandingkan Tamanbogo, Batang, Wonosari. Tanggal tanam yang diperkirakan beresiko menurunkan hasil adalah 1 dan 11 November (di Tamanbogo, 1 November-1 Januari, dan 21 Februari (di Sukamandi, 1 November-1 Desember (di Batang dan  1 November, 11 dan 21 Februari (di Wonosari. Untuk aplikasi skenario masa tanam, model prakiraan hujan perlu di perbarui di setiap saat dan tempat berdasarkan data prakiraan curah hujan terbaru di dukung dengan data tanah dan tanaman. Selain itu perlu diperhatikan cakupan wilayah yang bisa

[Descending necrotizing mediastinitis: the need for early diagnosis and aggressive treatment

NARCIS (Netherlands)

Schoenmakers, M.C.J.; Marres, H.A.M.; Merkx, M.A.W.; Verhagen, A.F.T.M.; Swieten, H.A. van

2009-01-01

Three patients developed descending necrotizing mediastinitis (DNM): a 44-year-old man due to poor dental status; a 54-year-old women due to a throat infection, 6 weeks after a tooth extraction; and a 30-year-old man a few days after a tooth extraction. Presenting symptoms were dyspnoea, fever,

Giant mediastinal schwannoma located in the lower right side of the ...

African Journals Online (AJOL)

2016-01-18

Jan 18, 2016 ... nerve. The tumor was coated with a white envelope and filled. Giant mediastinal schwannoma located in the lower right side of the chest. Y Wu, J Zhang, Y Chai. Department of Thoracic Surgery, School of Medicine, Second Affiliated Hospital, Zhejiang University, Hangzhou, China. Access this article online.

Reconstruction after esophagectomy for esophageal cancer: Retrosternal or posterior mediastinal route?

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Mei-Lin Chan

2011-11-01

Conclusion: For patients with esophageal cancer who undergo an esophagectomy followed by gastric conduit reconstruction, the posterior mediastinal route is superior to the retrosternal route in regard to anastomotic leakage and hospital mortality. Adjuvant radiotherapy did not influence the postoperative functions of the gastric conduit used for reconstruction in either route.

CT-guided core needle biopsy of mediastinal nodes through a transpulmonary approach: retrospective analysis of the procedures conducted over six years.

Science.gov (United States)

Yin, Zhongyuan; Liang, Zhiwen; Li, Pengcheng; Wang, Qiong

2017-08-01

To retrospectively evaluate the diagnostic performance and complications of a CT-guided core needle cutting biopsy of mediastinal nodes through a transpulmonary approach. From January 2009 to December 2014, we used a coaxial positioning system and an 18G cutting-type biopsy device to perform CT-guided percutaneous transpulmonary needle biopsies of mediastinal nodes for 127 patients. The diagnostic performance, complication rate, influencing factors, distribution of mediastinal nodes and pathological diagnoses were investigated. Among 127 patients, pathologic analyses showed that all of the biopsies were technically successful. The sensitivity, specificity, positive predictive value, and negative predictive value were all 100%. As for complications, the ratios for pneumothorax and hemoptysis were 33.9% and 4.7%, respectively. Multivariate analyses revealed that the distance from the pleura to the target lesion (P = 0.008) and the numbers of visceral pleura injuries (P = 0.006) were the two most significant risk factors for pneumothorax, and that the distance from the pleura to the target lesion (P = 0.004) was the most significant risk factor for hemoptysis. CT-guided core needle cutting biopsy of mediastinal nodes through a transpulmonary approach is a safe and efficient diagnostic method. • CT-guided core needle biopsy is an accurate technique for diagnosing mediastinal nodes. • The rates of complications are similar to those for pulmonary lesion biopsy. • Pneumothorax risk factors include distance from pleura to target lesion and number of visceral pleura. • Distance from pleura to target lesion is the risk factor for hemoptysis. • CT-guided core needle biopsy is an important diagnostic method for mediastinal nodes.

[Emergent Caesarean Section in a Patient with a Mediastinal Tumor and Von Recklinghausen Disease: A Case Report].

Science.gov (United States)

Owada, Mayuko; Inomata, Shinichi; Danmura, Masato; Yamada, Kumiko; Tanaka, Makoto

2016-06-01

It is rare to encounter a pregnant patient with a mediastinal tumor, and if the tumor size increases as the pregnancy progresses, this increase can cause complications such as airway constriction and vascular occlusion. We report a case of a pregnant patient diagnosed with von Recklinghausen disease at the age of seven and diagnosed with a mediastinal tumors just after her present admission. The impending suffocation progressed and fetal heart rate decreased during her hospitalization. Her trachea was intubated and she was moved to an operating room for an emergent cesarean section under general anesthesia. With this rapid response, we could rescue both patient and infant. If the size of mediastinal tumor increases as pregnancy progresses, the tumor will cause suffocation by airway compression from the outside, in addition to specific airway edema on the inward side. The present case demonstrates that appropriate desisoins must be made for airway manegement and initiation of surgery.

A retropharyngeal-mediastinal hematoma with supraglottic and tracheal obstruction: The role of multidisciplinary airway management

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Birkholz Torsten

2010-01-01

Full Text Available A 77-year-old man suffered hypoxemic cardiac arrest by supraglottic and tracheal airway obstruction in the emergency department. A previously unknown cervical fracture had caused a traumatic retropharyngeal-mediastinal hematoma. A lifesaving surgical emergency tracheostomy succeeded. Supraglottic and tracheal obstruction by a retropharyngeal-mediastinal hematoma with successful resuscitation via emergency tracheostomy after hypoxemic cardiac arrest has never been reported in a context of trauma. This clinically demanding case outlines the need for multidisciplinary airway management systems with continuous training and well-implemented guidelines. Only multidisciplinary staff preparedness and readily available equipments for the unanticipated difficult airway solved the catastrophic clinical situation.

Desarrollo óseo y actividad física: papel mediador de la masa magra, masa grasa y condición física

OpenAIRE

Torres Costoso, Ana Isabel

2016-01-01

La osteoporosis es el trastorno clínico que más comúnmente afecta al metabolismo óseo. Se caracteriza por unos niveles bajos de baja masa ósea y un deterioro de la arquitectura del tejido óseo que traen como consecuencia un incremento de la fragilidad ósea y un incremento del riesgo de fracturas. Aunque la osteoporosis se asocia a la edad avanzada, un desarrollo óseo apropiado desde edades tempranas ayuda a prevenir esta patología. De hecho, incrementos en la consistencia ósea durante la infa...

C-arm cone-beam CT virtual navigation-guided percutaneous mediastinal mass biopsy: Diagnostic accuracy and complications

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Kim, Hyungjin [Seoul National University College of Medicine, Department of Radiology, Seoul (Korea, Republic of); Seoul National University Medical Research Center, Institute of Radiation Medicine, Seoul (Korea, Republic of); Aerospace Medical Group, Air Force Education and Training Command, Jinju (Korea, Republic of); Park, Chang Min; Goo, Jin Mo [Seoul National University College of Medicine, Department of Radiology, Seoul (Korea, Republic of); Seoul National University Medical Research Center, Institute of Radiation Medicine, Seoul (Korea, Republic of); Seoul National University, Cancer Research Institute, Seoul (Korea, Republic of); Lee, Sang Min [Seoul National University College of Medicine, Department of Radiology, Seoul (Korea, Republic of); Seoul National University Medical Research Center, Institute of Radiation Medicine, Seoul (Korea, Republic of)

2015-12-15

To assess the usefulness of C-arm cone-beam computed tomography (CBCT) virtual navigation-guided percutaneous mediastinal mass biopsy in terms of diagnostic accuracy and complication rates. Seventy-eight CBCT virtual navigation-guided percutaneous mediastinal mass biopsies were performed in 75 patients (M:F, 38:37; mean age, 48.55 ± 18.76 years). The procedural details, diagnostic sensitivity, specificity, accuracy and complication rate were investigated. Mean lesion size was 6.80 ± 3.08 cm, skin-to-target distance was 3.67 ± 1.80 cm, core needle biopsy rate was 96.2 % (75/78), needle indwelling time was 9.29 ± 4.34 min, total procedure time was 13.26 ± 5.29 min, number of biopsy specimens obtained was 3.13 ± 1.02, number of CBCTs performed was 3.03 ± 0.68, rate of lesion border discrimination from abutting mediastinal structures on CBCT was 26.9 % (21/78), technical success rate was 100 % (78/78), estimated effective dose was 5.33 ± 4.99 mSv, and the dose area product was 12,723.68 ± 10,665.74 mGy.cm{sup 2}. Among the 78 biopsies, 69 were malignant, 7 were benign and 2 were indeterminate. Diagnostic sensitivity, specificity and accuracy for the diagnosis of malignancies were 97.1 % (67/69), 100 % (7/7) and 97.4 % (74/76), respectively, with a complication rate of 3.85 % (3/78), all of which were small pneumothoraces. CBCT virtual navigation-guided biopsy is a highly accurate and safe procedure for the evaluation of mediastinal lesions. (orig.)

The role of mediastinoscopy for diagnosis of isolated mediastinal lymphadenopathies

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Raluca Guteanu

2017-11-01

Full Text Available Mediastinoscopy is a diagnostic and/or therapeutic procedure through which it is realized visualization of the mediastinum contents, most times ending with a biopsy. Such procedure is often used in lung cancer for staging of the lymph nodes, or for a diagnosing purpose in several affections related to mediastinum (lymphoma or sarcoidosis. Morbidity is fairly low (0.2-0.5%, being encountered left recurrent laryngeal nerve injury, bleeding and pneumothorax. Contraindications are represented by previous mediastinoscopy, oncologic treatments (chemotherapy/ radiotherapy, due to development of mediastinal adhesions and fibrosis, or severe limitations in hyperextension of the neck (cervical arthritis, cutaneous tracheostomy. This paper presents the most important advantages and utility of mediastinoscopy, which proved during a long period of time to be safe, accurate and cost effective thoracic surgery technique. It minimizes the period of hospitalization and allows appropriate treatment to be immediately commenced upon diagnosis. Although there are a number of known complications of mediastinoscopy, it remains the ultimate diagnostic investigation for paratracheal and retrovascular enlarged mediastinal lymphnodes in centers where endo-bronchial ultrasound is absent or video assisted thoracoscopic surgery is not possible.

Tontas y víctimas: paradojas de ciertas posiciones analíticas sobre la cultura de masas

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Carolina Justo von Lurzer

2015-01-01

Full Text Available [es] A partir de la denuncia enviada este año al canal de televisión Telefé intimando a que en el plazo de veinticuatro horas se levantara del aire el sketch “La Nena” del programa Poné a Francella que el mismo emitía diariamente -en donde se argumenta que el sketch “promueve el acoso y el abuso sexual a menores” y “fomenta la pedofilia en el placer sexual que evidencia con una niña”-, este artículo se propone indagar sobre el estado actual en Argentina de la crítica cultural y comunicacional en torno a géneros y sexualidades. Partimos de un diagnóstico inicial que ha ido tomando forma en nuestras investigaciones doctorales: las miradas dominantes sobre la relación entre industrias culturales y audiencias, especialmente la relación entre “medios” y “mujeres”, son la victimización y la estupidización. Esto es: las mujeres son “víctimas” cuando son representadas en la cultura de masas y “tontas” cuando la consumen. Desde la inquietud que nos genera que dichas retóricas aparezcan en algunos casos como punto de partida incuestionable, nos peguntaremos: ¿qué ideas sobre géneros y sexualidades sustentan sus hipótesis?, ¿qué posiciones de sujeto habilitan u ocluyen estas retóricas en relación con la cultura de masas?, ¿cuál es el rol que el Estado debería cumplir en estos casos?. [en] Based on the complaint sent to the television channel Telefe intimating to remove from schedule the sketch “La Nena” within twenty-four hours, which argued that the sketch “promotes bullying and child sexual abuse” and “promotes pedophilia” - this article seeks to explore the current state of cultural criticism on gender and sexualities in Argentina Our initial diagnosis is that the hegemonic perspectives on the relationship between cultural industries and audiences, especially “media” and “women” are what we call “dumbing” and “victimization”. That is, women are “victims” when they are

Las masas de aire que afectan el sur de la provincia de Santa Fe y su relación con la precipitación diaria en enero Classification of air masses that affect the south of Santa Fe, their trajectories and the relationship between them to the the daily precipitation in January abstract

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Alejandra S. Coronel

2010-06-01

Full Text Available El objetivo del trabajo es identificar las masas de aire que afectan el sur de Santa Fe durante los eneros de 1998-2006 y relacionarlas con la precipitación diaria, tomando como estación representativa a Zavalla (33º01´S, 60º53´O. La información diaria analizada es: temperaturas media, máxima y mínima, humedad relativa, heliofanía efectiva, presión atmosférica, precipitación y dirección de viento a las 8 y 14 horas local, campos de altura geopotencial en 1000 y 500 hPa, de temperatura en 1000 hPa y de humedad específica en 850 hPa del NCEP. Se aplica el algoritmo K-means y se identifican cuatro tipos de masas de aire: Cálida Seca (mCS: muy cálida; Cálida Húmeda (mCH: aumenta significativamente la humedad y la nubosidad respecto a mCS; Templada Seca (mTS: menores temperaturas mínimas; Templada Húmeda (mTH: muy húmeda, y bajas amplitudes térmicas diarias, asociada a condiciones previas al pasaje de frentes fríos. El 50% de días lluviosos ocurren durante mCH y el 32% con mTH, y el 93% de las más intensas acontecen durante el predominio de dichas masas. Las mTH tienen mayor eficiencia en la ocurrencia de precipitación pues en el 50% de los casos precipita, y para las mCH solo en el 27%.The aim of this work is to identify the air masses that affect the south of Santa Fe in January during 1998-2006 and to relate it to the daily precipitation, in Zavalla (33º01´S, 60º53´O. The analyzed daily information is: mean, maximum and minimum temperature, relative humidity, effective insolation, atmospheric pressure, precipitation and wind direction of the 8 and 14 hours. The fields of circulation and temperature in 1000 and 500 hPa, and specific humidity in 850 hPa, are calculated using NCEP Reanálisis data. Analysis of cluster k-means is applied and it determines four types of air masses: Warm Drought: a very warm air mass; Warm Humid: it increases the humidity and cloudiness, Moderate Dry: air mass with the smallest minimum

FDG PET/CT criteria for diagnosing mediastinal lymph node metastasis in patients with non-small cell lung cancer

International Nuclear Information System (INIS)

Cho, Y. S.; Choi, J. Y.; Lee, K. S.; Kwon, O. J.; Sim, Y. M.; Lee, S. J.; Hyun, S. H.; Lee, J. Y.; Lee, K. H.; Kim, B. T.

2007-01-01

We investigated the most accurate FDG PET/CT criteria using various PET and CT parameters for diagnosing metastatic mediastinal lymph nodes in patients with untreated NSCLC. Subjects were 178 consecutive patients with NSCLC undergoing PET/CT and surgical nodal staging. Diagnostic criteria of PET/CT for involvement of each mediastinal nodal station were max. SUV (mSUV), average SUV (aSUV), max. CT Hounsfield unit (mHU), average CT Hounsfield unit (aHU), and 5-point visual grading for CT attenuation; normal, suspicious/definite high attenuation (HA), partial/definite calcification (CAL). ROC curve analysis was done to assess the performance of each PET/CT criterion for detection of metastatic mediastinal nodal station. Of the pathologically examined 649 mediastinal nodal stations, 50 stations in 39 patients were proven to be malignant. The areas under curve (AUC) of ROC analysis for each criteria were 0.8882 (mSUV), 0.8875 (aSUV), 0.5668 (mHU), 0.5468 (aHU), and 0.4369 (VA), respectively. There were no malignant lymph nodes with increased FDG uptake having mHU > 120, aHU > 90, visually definite HA, or CAL. Using the benign criteria of mHU > 120, the AUCs of PET were significantly improved to 0.9233 (mSUV) and 0.9080 (aSUV), respectively (p 90, the AUCs of PET were improved to 0.8991 (mSUV, p 0.05), respectively. Using the benign criteria of visually definite HA or CAL, the AUCs of PET were significantly improved to 0.9094 (mSUV) and 0.9091 (aSUV), respectively (p 120, and visually definite HA or CAL can be used as PET/CT diagnostic criteria suggesting benign mediastinal lymph nodes in patients with NSCLC, irrespective of FDG uptake

Quantitative CT texture and shape analysis: Can it differentiate benign and malignant mediastinal lymph nodes in patients with primary lung cancer?

Energy Technology Data Exchange (ETDEWEB)

Bayanati, Hamid; Thornhill, Rebecca E.; Souza, Carolina A.; Sethi-Virmani, Vineeta; Gupta, Ashish; Dennie, Carole [University of Ottawa, The Ottawa Hospital Research Institute, Department of Medical Imaging, The Ottawa Hospital, 501 Smyth Road, Box 232, Ottawa, ON (Canada); Maziak, Donna [University of Ottawa, The Ottawa Hospital Research Institute, Department of Surgery - Division of Thoracic Surgery, The Ottawa Hospital, Ottawa, ON (Canada); Amjadi, Kayvan [University of Ottawa, The Ottawa Hospital Research Institute, Department of Respiratory Medicine, The Ottawa Hospital, Ottawa, ON (Canada)

2014-09-13

To assess the accuracy of CT texture and shape analysis in the differentiation of benign and malignant mediastinal nodes in lung cancer. Forty-three patients with biopsy-proven primary lung malignancy with pathological mediastinal nodal staging and unenhanced CT of the thorax were studied retrospectively. Grey-level co-occurrence and run-length matrix textural features, as well as morphological features, were extracted from 72 nodes. Differences between benign and malignant features were assessed using Mann-Whitney U tests. Receiver operating characteristic (ROC) curves for each were constructed and the area under the curve (AUC) calculated with histopathology diagnosis as outcome. Combinations of features were also entered as predictors in logistic regression models and optimal threshold criteria were used to estimate sensitivity and specificity. Using optimum-threshold criteria, the combined textural and shape features identified malignant mediastinal nodes with 81 % sensitivity and 80 % specificity (AUC = 0.87, P < 0.0001). Using this combination, 84 % malignant and 71 % benign nodes were correctly classified. Quantitative CT texture and shape analysis has the potential to accurately differentiate malignant and benign mediastinal nodes in lung cancer. (orig.)

Algunas leyes fundamentales de la química y las magnitudes físicas relacionadas con el equivalente

OpenAIRE

Antonio M. Navarro López

2010-01-01

En este tema se tratan algunas leyes fundamentales de la química, tales como la Ley de la conservación de la materia, la Ley de las proporciones definidas o ley de los equivalentes, así como las magnitudes físicas relacionadas con el equivalente como son: La cantidad de sustancia en equivalente , masa molar del equivalente tanto de un elemento químico , de los ácidos, de las bases, de las sales ,todo expresado en el sistema Internacional de Unidades ....

Embolismo paradójico inminente evidenciado por ecocardiografía en pacientes con foramen ovale persistente Imminent paradoxical embolism evidenced by echocardiography in patients with patent foramen ovale

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Luis E Mayorga

2008-10-01

Full Text Available Paciente de género masculino, de 72 años de edad, con antecedente de trombo-embolismo pulmonar, quien ingresó por evento cerebro-vascular isquémico y en quien en el ecocardiograma trans-torácico y luego en el trans-esofágico, se encontró una masa móvil que sugería un trombo que traspasaba el foramen ovale permeable. Ante el diagnóstico de embolismo paradójico inminente, se consideró realizar trombectomía quirúrgica, la cual se difirió por infección y se inició anticoagulación con heparina de bajo peso molecular. Se realizó un ecocardiograma de control y se observó que la masa había desaparecido por completo. Se dio de alta con anticoagulación oral.A 72 years old male patient with previous history of pulmonary thrombosis was admitted with an ischemic stroke. In a transtoraxic echocardiogram, as well as in a posterior transesophagic one, a mobile mass suggesting a thrombus going through a patent foramen ovale, was found. Facing an imminent paradoxical embolism, surgical thrombectomy was considered that could no be realized due to infection. Anticoagulation with low molecular weight heparin was initiated. A control echocardiogram showed complete disappearance of the mass. The patient was discharged with oral anticoagulation.

Factores de riesgo asociados con la prevalencia de hipertensión arterial en adultos de Bucaramanga, Colombia

OpenAIRE

Bautista Leonelo E; Vera-Cala Lina María; Villamil Liliana; Silva Sandra M; Peña Iván M; Luna Laura V

2002-01-01

Objetivo. Cuantificar la prevalencia de hipertensión arterial y su asociación con edad, sexo, estrato socioeconómico e índice de masa corporal. Material y métodos. Encuesta transversal, de base poblacional, hecha en 1996, en una muestra aleatoria de 356 adultos superscript three 20 años de edad, residentes en Bucaramanga, Colombia, en quienes se midieron peso, talla y presión arterial y se consideraron edad y sexo. Se usaron regresión lineal robusta y regresión binomial para estimar el efecto...

Mediastinal Tracheostoma for Treatment of Tracheostenosis after Tracheostomy in a Patient with Mucopolysaccharidosis-Induced Tracheomalacia

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Yasuhiro Chikaishi

2017-01-01

Full Text Available Background. Treatment of tracheostenosis after tracheostomy in pediatric patients is often difficult. Mucopolysaccharidosis is a lysosomal storage disease that may induce obstruction of the airways. Case Presentation. A 16-year-old male patient underwent long-term follow-up after postnatal diagnosis of type II mucopolysaccharidosis. At 11 years of age, tracheostomy was performed for mucopolysaccharidosis-induced laryngeal stenosis. One week prior to presentation, he was admitted to another hospital on an emergency basis for major dyspnea. He was diagnosed with tracheostenosis caused by granulation. The patient was then referred to our institution. The peripheral view of his airway was difficult because of mucopolysaccharidosis-induced tracheomalacia. For airway management, a mediastinal tracheostoma was created with extracorporeal membrane oxygenation. To maintain the blood flow, the skin incision for the mediastinal tracheal hole was sharply cut without an electrotome. The postoperative course was uneventful, and the patient was weaned from the ventilator on postoperative day 19. He was discharged 1.5 months postoperatively. Although he was referred to another institution because of respiratory failure caused by his primary disease 6 months postoperatively, his airway management remained successful for 1.5 years postoperatively. Conclusion. Mediastinal tracheostomy was useful for treatment of tracheostenosis caused by granulation tissue formation after a tracheostomy.

Exploring the Bacterial Microbiota of Colombian Fermented Maize Dough “Masa Agria” (Maiz Añejo)

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Chaves-Lopez, Clemencia; Serio, Annalisa; Delgado-Ospina, Johannes; Rossi, Chiara; Grande-Tovar, Carlos D.; Paparella, Antonello

2016-01-01

Masa Agria is a naturally fermented maize dough produced in Colombia, very common in the traditional gastronomy. In this study we used culture-dependent and RNA-based pyrosequencing to investigate the bacterial community structure of Masa Agria samples produced in the south west of Colombia. The mean value of cell density was 7.6 log CFU/g of presumptive lactic acid bacteria, 5.4 log cfu/g for presumptive acetic bacteria and 5.6 og CFU/g for yeasts. The abundance of these microorganisms is also responsible for the low pH (3.1–3.7) registered. Although the 16S rRNA pyrosequencing revealed that the analyzed samples were different in bacteria richness and diversity, the genera Lactobacillus, Weissella, and Acetobacter were predominant. In particular, the most common species were Lactobacillus plantarum and Acetobacter fabarum, followed by L. fermentum, L. vaccinostercus, and Pediococcus argentinicus. Several microorganisms of environmental origin, such as Dechloromonas and most of all Sphingobium spp., revealed in each sample, were detected, and also bacteria related to maize, such as Phytoplasma. In conclusion, our results elucidated for the first time the structures of the bacterial communities of Masa Agria samples obtained from different producers, identifying the specific dominant species and revealing a complete picture of the bacterial consortium in this specific niche. The selective pressure of tropical environments may favor microbial biodiversity characterized by a useful technological potential. PMID:27524979

Exploring the bacterial microbiota of Colombian fermented maize dough “Masa Agria” (Maiz Añejo

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Clemencia Chaves

2016-07-01

Full Text Available Masa Agria is a naturally fermented maize dough produced in Colombia, very common in the traditional gastronomy. In this study we used culture-dependent and RNA-based pyrosequencing to investigate the bacterial community structure of Masa Agria samples produced in the south west of Colombia. The mean value of cell density was 7.6 Log CFU/g of presumptive lactic acid bacteria (LAB, 5.4 Log cfu/g for presumptive acetic bacteria and 5.6 Log CFU/g for yeasts. The abundance of these microorganisms is also responsible for the low pH (3.1-3.7 registered. Although the 16S rRNA pyrosequencing revealed that the analyzed samples were different in bacteria richness and diversity, the genera Lactobacillus, Weissella and Acetobacter were predominant. In particular, the most common species were Lactobacillus plantarum and Acetobacter fabarum, followed by Lb. fermentum, Lb. vaccinostercus and Pediococcus argentinicus. Several microorganisms of environmental origin, such as Dechloromonas and most of all Sphingobium spp., revealed in each sample, were detected, and also bacteria related to maize, such as Phytoplasma. In conclusion, our results elucidated for the first time the structures of the bacterial communities of Masa Agria samples obtained from different producers, identifying the specific dominant species and revealing a complete picture of the bacterial consortium in this specific niche. The selective pressure of tropical environments may favour microbial biodiversity characterized by a useful technological potential.

Clinical investigation on usefulness of MRI in the diagnosis of mediastinal masses

Energy Technology Data Exchange (ETDEWEB)

Oyama, Takao (Kagoshima Univ. (Japan). Faculty of Medicine)

1994-02-01

This study evaluated the utility of magnetic resonance imaging (MRI) in diagnosing mediastinal masses. The subjects were 96 patients with pathologically (n=82) and clinically (n=14) proven mediastinal masses, consisting of thymomas (30), teratomas (4), other thymic tumors (5), intrathoracic goiters (4), neurogenic tumors (7), congenital cysts (12), mesenchymal tumors (10), vascular masses (5), phrenic hernia (3), malignant lymphomas (6), and sarcoidosis (10). MRI findings, including marginal and capsular appearances, internal structures and signal intensities, were analyzed. Internal structure characteristic to thymomas were seen in 24 teratoma patients (80%). In 4 teratomas, MRI was capable of distinguishing benign (2) from malignant (2) ones. In the other 5 thymic tumors, MRI delineated chemical characteristics of fluids for thymic cysts (2) and internal structures for thymic cancer (2) and lipoma (one). It also delineated the continuity of intrathoracic goiter from the cervical to intrathoracic regions. For neurogenic tumors, MRI was capable of distinguishing neurofibromas from schwannomas and also benign from malignant schwannomas. A well-defined smooth margin and very high signal intensity, which were characteristic to congenital cysts, were seen on T2-weighted images. Signal intensities on T1-weighted images reflected fluid features in cysts. For mesenchymal tumors, consisting of hemangioma, hemangiosarcoma, malignant melanoma, aneurysmal bone cyst and osteosarcoma, lymphangioma and chondrosarcoma, all but osteosarcoma showed their respective characteristic MRI findings. Vascular masses were delineated as flow void structures. MRI delineated herniated contents. Malignant lymphoma was shown as irregular and inhomogeneous swollen lymph nodes, but sarcoidosis was shown as regular and homogeneous ones on MRI. In conclusion, MRI is a useful, informative modality for diagnosing mediastinal masses. (N.K.) 84 refs.

Clinical investigation on usefulness of MRI in the diagnosis of mediastinal masses

International Nuclear Information System (INIS)

Oyama, Takao

1994-01-01

This study evaluated the utility of magnetic resonance imaging (MRI) in diagnosing mediastinal masses. The subjects were 96 patients with pathologically (n=82) and clinically (n=14) proven mediastinal masses, consisting of thymomas (30), teratomas (4), other thymic tumors (5), intrathoracic goiters (4), neurogenic tumors (7), congenital cysts (12), mesenchymal tumors (10), vascular masses (5), phrenic hernia (3), malignant lymphomas (6), and sarcoidosis (10). MRI findings, including marginal and capsular appearances, internal structures and signal intensities, were analyzed. Internal structure characteristic to thymomas were seen in 24 teratoma patients (80%). In 4 teratomas, MRI was capable of distinguishing benign (2) from malignant (2) ones. In the other 5 thymic tumors, MRI delineated chemical characteristics of fluids for thymic cysts (2) and internal structures for thymic cancer (2) and lipoma (one). It also delineated the continuity of intrathoracic goiter from the cervical to intrathoracic regions. For neurogenic tumors, MRI was capable of distinguishing neurofibromas from schwannomas and also benign from malignant schwannomas. A well-defined smooth margin and very high signal intensity, which were characteristic to congenital cysts, were seen on T2-weighted images. Signal intensities on T1-weighted images reflected fluid features in cysts. For mesenchymal tumors, consisting of hemangioma, hemangiosarcoma, malignant melanoma, aneurysmal bone cyst and osteosarcoma, lymphangioma and chondrosarcoma, all but osteosarcoma showed their respective characteristic MRI findings. Vascular masses were delineated as flow void structures. MRI delineated herniated contents. Malignant lymphoma was shown as irregular and inhomogeneous swollen lymph nodes, but sarcoidosis was shown as regular and homogeneous ones on MRI. In conclusion, MRI is a useful, informative modality for diagnosing mediastinal masses. (N.K.) 84 refs

Parque natural y turismo de masas: ¿compatibilidad? estudio de las relaciones entre el Parque natural de las lagunas de la mata y torrevieja y la estación Balnearia de Torrevieja (españa

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Frédéric Farra

2002-01-01

Full Text Available El estudio que se propone es un trabajo científico necesario para el conocimiento de la evolución de las relaciones hombre/medio a comienzos del tercer milenio: tratar de entender si un Parque natural regional es compatible o no con el turismo de masas. Para responder a esta pregunta, se estudia el caso peculiar de la estación balnearia2 española de Torrevieja y del Parque natural regional de La Mata y Torrevieja al sureste de la península Ibérica, un laboratorio interesante para reflexionar sobre este tema

A Case of Ruptured Aneurysm of the Proper Esophageal Artery with Symptomatic Mediastinal Hematoma

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Liu, Jiajia; Sato, Yusuke, E-mail: yusuke@doc.med.akita-u.ac.jp [Akita University Graduate School of Medicine, Department of Thoracic Surgery (Japan); Takahashi, Satoshi [Akita University Graduate School of Medicine, Department of Radiology (Japan); Motoyama, Satoru; Yoshino, Kei; Sasaki, Tomohiko; Imai, Kazuhiro; Saito, Hajime; Minamiya, Yoshihiro [Akita University Graduate School of Medicine, Department of Thoracic Surgery (Japan)

2016-08-15

Mediastinal aneurysms are rare but potentially life-threatening. Among these, bronchial artery aneurysms are most frequently reported, whereas up to now aneurysms of the proper esophageal artery had never been reported. A 69-year-old woman was referred to our hospital for treatment of a massive mediastinal hematoma. Enhanced computed tomography and selective proper esophageal arteriography revealed a 5-mm aneurysm in the proper esophageal artery that arises from the thoracic aorta at the Th8 level and has an anastomotic branch with the bronchial artery peripherally. Transcatheter arterial embolization was successfully performed using a mixture of N-butyl cyanoacrylate and lipiodol (1:3 ratio, 0.3 ml). Post-embolization angiography showed no filling into the aneurysm. The patient recovered with no complications and was discharged on the 25th post-procedure day.

CT and MRT in mediastinal and hilar masses. CT und MRT bei mediastinalen und hilaeren Raumforderungen

Energy Technology Data Exchange (ETDEWEB)

Prayer, L.; Kramer, J.; Stiglbauer, R.; Wimberger, D.; Imhof, H. (Vienna Univ. (Austria). Klinik fuer Radiodiagnostik Ludwig-Boltzmann-Institut fuer Radiologisch-Physikalische Tumordiagnostik, Vienna (Austria)); Metz, V. (Vienna Univ. (Austria). 2. Chirurgische Klinik)

1990-11-01

Thirty-eight patients with mediastinal and/or hilar masses were imaged by computed tomography (CT) and magnetic resonance imaging (MRI). Results were analyzed retrospectively regarding the ability to demonstrate the masses, their number, size, definition, location and tissue characteristics. CT and MRI showed equivalent results in 32 cases; additional information was obtained in two patients by CT, in four patients by MRI. In view of the specific advantages and limitations of both CT and MRI we believed that in patients with mediastinal and/or hilar masses, contrast enhanced CT remains the procedure of choice after performing plain chest radiographs; in certain cases MRI will prove useful for further evaluation. (orig.).

El servicio de Internet con acceso móvil en el Ecuador

OpenAIRE

Morales Arévalo, Flavio David

2013-01-01

El acceso a Internet a través de dispositivos móviles permite la unión de dos grandes. Por un lado, la telefonía móvil celular con su gran capacidad de alcanzar a las masas y por otro, el acceso a un mundo de información y contenidos propios de Internet. En Ecuador, la telefonía móvil cuya penetración ya superó el 100%, pasará de ser un mercado solo de voz y mensajes de texto hacia una evolución de navegación en Internet y redes sociales. En este contexto, es importante determinar el aporte s...

An Endoscopic Nasomediastinal Approach to a Mediastinal Abscess Developing after Zenker's Diverticulectomy

Science.gov (United States)

Gundogdu, Kemal; Eminler, Ahmet Tarik; Parlak, Erkan; Cakmak, Guner

2017-01-01

Zenker's diverticulum is the most frequent symptomatic diverticulum of the esophagus, but the prevalence is <0.1%. The optimal treatment is surgery. Here, we present a nasomediastinal drainage approach to treatment of a mediastinal abscess, developing in the late postoperative period and attributable to leakage from the staple line. PMID:28831318

Echocardiographic and non-gated computed tomographic findings of intrapericardial tumor and mediastinal tumor adjacent to the heart

International Nuclear Information System (INIS)

Ueda, Minoru; Yamada, Nobuyuki; Saito, Daiji; Haraoka, Shoichi; Tanetani, Setsuro.

1981-01-01

Echocardiographic and computed tomographic findings of a case of intrapericardial tumor are reported, and two other cases of mediastinal tumor are presented in a discussion of the differential diagnosis of intrapericardial from mediastinal tumors. Case report: A 7-year-old male complained of cough and dyspnea. Cardiomegaly had been pointed out at a mass X-ray examination about a month prior to the admission. Two-dimensional echocardiography revealed a massive anterior pericardial effusion and a fist-sized tumor with cystic structure. The tumor pushed the heart backward at the level of the aortic root. Non-gated computed tomography of the chest disclosed the size and location of the tumor, but failed to clarify the internal structure. The patient underwent successful removal of a tumor, 12 x 10 x 8 cm in size and 350 g in weight, originating from the left atrial wall. Histologically, the tumor was a fibrosarcomatous mesothelioma. Usually, an intrapericardial tumor is easily suspected by echocardiography by the presence of pericardial effusion, although there have been a few reports of intrapericardial tumors without pericardial effusion. Echocardiographic diagnosis of the intrapericardial tumor is difficult in such cases. Identification of the pericardium is necessary to diagnose whether a tumor is intra- or extrapericardial. This identification, however, is not always easy by echocardiography when the ultrasonic beams become tangent to the pericardium. The pericardium between the tumor and the heart could not be identified by echocardiography in our two cases of mediastinal tumor. Computed tomography is helpful in diagnosing the size and location of a mediastinal tumor. (author)

Mecanismos que analizan a nivel hepático el destino de los ácidos grasos del plasma y su relación con la resistencia insulínica en dislipemia experimental. Estrategias de prevención y/o mejoramiento por dietas

OpenAIRE

Hein, Gustavo Juan

2011-01-01

Los resultados alcanzados demuestran que la administración crónica de una dieta rica en sacarosa (DRS) indujo en hígado: incremento en la masa proteica del receptor nuclear LXR alfa y disminución en la masa del receptor PPAR alfa. Esto se relacionó con la activación de las enzimas lipogénicas y menor actividad de las enzimas de la oxidación de ácidos grasos, indicando un destino preferencial de éstos hacia la vía de reesterificación y síntesis de triglicéridos hepáticos. Los animales dislipid...

Utility and Safety of Endoscopic Ultrasound With Bronchoscope-Guided Fine-Needle Aspiration in Mediastinal Lymph Node Sampling: Systematic Review and Meta-Analysis.

Science.gov (United States)

Dhooria, Sahajal; Aggarwal, Ashutosh N; Gupta, Dheeraj; Behera, Digambar; Agarwal, Ritesh

2015-07-01

The use of endoscopic ultrasound with bronchoscope-guided fine-needle aspiration (EUS-B-FNA) has been described in the evaluation of mediastinal lymphadenopathy. Herein, we conduct a meta-analysis to estimate the overall diagnostic yield and safety of EUS-B-FNA combined with endobronchial ultrasound-guided transbronchial needle aspiration (EBUS-TBNA), in the diagnosis of mediastinal lymphadenopathy. The PubMed and EmBase databases were searched for studies reporting the outcomes of EUS-B-FNA in diagnosis of mediastinal lymphadenopathy. The study quality was assessed using the QualSyst tool. The yield of EBUS-TBNA alone and the combined procedure (EBUS-TBNA and EUS-B-FNA) were analyzed by calculating the sensitivity, specificity, positive likelihood ratio, negative likelihood ratio, and diagnostic odds ratio for each study, and pooling the study results using a random effects model. Heterogeneity and publication bias were assessed for individual outcomes. The additional diagnostic gain of EUS-B-FNA over EBUS-TBNA was calculated using proportion meta-analysis. Our search yielded 10 studies (1,080 subjects with mediastinal lymphadenopathy). The sensitivity of the combined procedure was significantly higher than EBUS-TBNA alone (91% vs 80%, P = .004), in staging of lung cancer (4 studies, 465 subjects). The additional diagnostic gain of EUS-B-FNA over EBUS-TBNA was 7.6% in the diagnosis of mediastinal adenopathy. No serious complication of EUS-B-FNA procedure was reported. Clinical and statistical heterogeneity was present without any evidence of publication bias. Combining EBUS-TBNA and EUS-B-FNA is an effective and safe method, superior to EBUS-TBNA alone, in the diagnosis of mediastinal lymphadenopathy. Good quality randomized controlled trials are required to confirm the results of this systematic review. Copyright © 2015 by Daedalus Enterprises.

HUBUNGAN MASA KERJA DAN SIKAP KERJA DENGAN KEJADIAN SINDROM KARPAL PADA PEMBATIK CV. PUSAKA BERUANG LASEM

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Cris Purwandari Mulyawati Agustin

2014-10-01

Full Text Available Pembatik merupakan pekerja sektor informal, dimana pada saat membatik melakukan gerakan berulang, gerakan tangan dengan kekuatan, posisi fleksi dan ekstensi, sehingga menyebabkan stress pada jaringan disekitar terowongan karpal. Tujuan penelitian ini untuk mengetahui hubungan masa kerja dan sikap kerja dengan kejadian STK pada pembatik CV. Pusaka Beruang.Penelitian ini menggunakan pendekatan cross sectional. Populasi dalam penelitian berjumlah 68 orang. Sampel penelitian berjumlah 22 responden. Instrument penelitian berupa kuesioner dan pengukuran tes phalen. Data dianalisis dengan uji Chi-square.Hasil penelitian menunjukkan bahwa ada hubungan masa kerja p=0,029 dan sikap kerja p=0,031 dengan kejadian STK. Masa kerja > 4 tahun dan level sikap kerja yang tinggi mempunyai risiko STK karena terjadi stress disekitar jaringan terowongan karpal.Simpulan pada penelitian ini ada hubungan antara masa kerja dan sikap kerja dengan kejadian STK. Saran untuk pekerja diharapkan dapat melakukan istirahat secara teratur setiap 15-20 menit untuk mengurangi risiko STK. Batik is an informal sector workers describe or designed batik with the traditional way of working. Which time both do repetitive motion, hand movements with strength, position, position the extension and flexion, hand static, thus causing stress on the network around the carpal tunnel. The purpose of this research is to know the relation tenure and working attitude with STK batik meker in CV. Pusaka Beruang. This research uses the approach of cross sectional. The population in this research is totalling 68 peoples. Sample research amounted to 22 respondents. Research Instrument in the form of questionnaires and measurement test phalen. Data were analyzed by Chi square test. The results showed that there was a relationship tenure p = 0.029 and working attitude p = 0.031 with STK events. Tenure > 4 years and a high level of work attitudes have STK risk due to stress around the carpal tunnel syndrome

CT appearance of hilar and mediastinal enlarged lymph nodes of coal worker's pneumoconiosis

International Nuclear Information System (INIS)

Ma Daqing; Guan Yansheng; Tang Hongqu; He Wen; Chen Budong; Zhang Yansong; Li Jun

2000-01-01

Objective: To study the CT appearance of the hilar and mediastinal enlarged lymph nodes in coal worker's pneumoconiosis (CWP), its pathological basis and diagnostic value for CWR complicated with lung cancer. Methods: (1) Twelve isolated lungs with CWP obtained at autopsy were inflated and fixed. CT scan was performed. The pathologic findings of enlarged lymph nodes were identified. (2) CT findings of hilar and mediastinal enlarged lymph nodes of 71 cases with CWP and 22 cases of CWP complicated with lung cancer were analyzed. Results: (1) Most of the enlarged hilar and mediastinal lymph nodes in simple CWR was in third stage of fibrosis. The fourth stage of fibrosis was only seen in lymph nodes of a case with complicated CWP. In this case the necrotic materials of lymph nodes eroded adjacent bronchi and vessels, and coalesced with progressive massive fibrosis (PMF). (2) The average number of lymph nodes in cases of complicated CWP was more than that of simple CWP (P 2 cm was 7.4%. (3) The prevalence of lymph nodes calcification in CWP was 61.1%, but egg shell calcification was only 14.7%. (4) In the cases of CWP complicated with lung cancer, lymph node > 2 cm was 20.8%, that was more than CWP (P 3 cm was 7.6%. Conclusion: Lymph nodes up to 1 cm may have dust fibrosis and coal silicosis nodules. The lymph nodes >2 cm is more common in CWP complicated with lung cancer than in simple CWP. The lymph nodes > 3 cm indicates higher probability of CWP with lung cancer than PMF

Two case of osteoarthropathy due to mediastinal tumor

Energy Technology Data Exchange (ETDEWEB)

Lee, S; Lee, C S; Shin, Y K; Kim, B S [Busan National University College of Medicine, Busan (Korea, Republic of)

1972-12-15

Authors experienced two cases of osteoarthropathy due to mediastinal tumor, which are reported with a review of the literature. A case was 59 years old man, who complained chest discomfortness, coughing, dyspnea and clubbing fingers. The other was 39 years old man, who complained arthralgia, clubbing of digits and pain in the left medial clavicular area. Their family histories were not contributory. The radiologic findings of the chest showed timorous mass in the mediastinum. Examination of the extremities showed periosteal reaction and subperiosteal proliferation along the long bones and digits. Distal phalanges revealed clubbing without bone changes.

CT-guided core needle biopsy of mediastinal nodes through a transpulmonary approach: retrospective analysis of the procedures conducted over six years

Energy Technology Data Exchange (ETDEWEB)

Yin, Zhongyuan; Liang, Zhiwen; Li, Pengcheng; Wang, Qiong [Huazhong University of Science and Technology, Cancer Center, Union Hospital, Tongji Medical College, Wuhan (China)

2017-08-15

To retrospectively evaluate the diagnostic performance and complications of a CT-guided core needle cutting biopsy of mediastinal nodes through a transpulmonary approach. From January 2009 to December 2014, we used a coaxial positioning system and an 18G cutting-type biopsy device to perform CT-guided percutaneous transpulmonary needle biopsies of mediastinal nodes for 127 patients. The diagnostic performance, complication rate, influencing factors, distribution of mediastinal nodes and pathological diagnoses were investigated. Among 127 patients, pathologic analyses showed that all of the biopsies were technically successful. The sensitivity, specificity, positive predictive value, and negative predictive value were all 100%. As for complications, the ratios for pneumothorax and hemoptysis were 33.9% and 4.7%, respectively. Multivariate analyses revealed that the distance from the pleura to the target lesion (P = 0.008) and the numbers of visceral pleura injuries (P = 0.006) were the two most significant risk factors for pneumothorax, and that the distance from the pleura to the target lesion (P = 0.004) was the most significant risk factor for hemoptysis. CT-guided core needle cutting biopsy of mediastinal nodes through a transpulmonary approach is a safe and efficient diagnostic method. (orig.)

Role of mediastinal and multi-organ CT scans in staging presumable surgical candidates with non-small-cell lung cancer

Energy Technology Data Exchange (ETDEWEB)

Osada, Hiroaki; Nakajima, Yasuo; Taira, Yasuhiko; Yokote, Kumio; Noguchi, Teruhiko

1987-09-01

In order to evaluate the role of CT scan and bone scan in staging patients with non-small-cell lung cancer presumably indicated for surgery, 70 consecutive patients who underwent thoracotomy were reviewed. Most of them received mediastinal and multi-organ (brain, liver and adrenal) CT scans and a bone scan. In the most recent 40 of the 70 patients, CT findings of the mediastinal lymph nodes were compared to the pathology following complete sampling. The overall accuracy of the mediastinal CT was 60.0 per cent (12 true positive and 12 true negative), but the negative predictable value was 12/(12 + 3) or 80.0 per cent, whereas 3 were false negatives though they showed an acceptable postoperative course. Sixteen out of 21 patients with one, or at the most, three enlarged nodes detected on CT also did well postoperatively and retrospectively, were considered not to have required mediastinoscopy. A group of patients showing no, or at the most, three enlarged mediastinal lymph nodes on CT may be considered as candidates for surgery even without mediastinoscopy. Multi-organ survey by means of CT was believed cost-ineffective and omittable. Bone scan however, retrospectively detected three true positives among 20 patients with a positive uptake, so that it cannot be omitted out of hand, though further examination of this point is required.

Management of mediastinal parathyroid adenoma via minimally invasive thoracoscopic surgery: Case report

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Saulat Hasnain Fatimi

2017-01-01

Conclusion: Symptomatic hypercalcemia and high level of PTH without local PA should alert physicians to search for ectopic locations through imaging. VATS is a safe and effective minimally invasive procedure for the resection of ectopic mediastinal PA and it should be considered as the first line approach for resection of these ectopic tumors.

Chronic eosinophilic pneumonia involving with mediastinal lymph nodes: radiologic study of three cases

International Nuclear Information System (INIS)

Calvo Garcia, A.; Gordillo Gutierrez, I.; Guembe Urtiaga, P.

1994-01-01

Chronic eosinophilic pneumonia (CEP) is an uncommon disorder in our setting. Chest x-ray is essential to diagnosis. To date, we have found only three reported cases in which mediastinal lymph nodes were involved. We present three additional cases with standard thoracic study. (Author)

Cervical and mediastinal emphysema secondary to third molar extraction.

Science.gov (United States)

Goodnight, J W; Sercarz, J A; Wang, M B

1994-01-01

A dramatic case of infected emphysema involving multiple deep cervical and mediastinal fascial planes following surgical extraction of a lower third molar in an otherwise healthy man is presented. The differential diagnosis and management of this condition are discussed, specifically contrasting it to necrotizing fasciitis. The direct cause of this complication was the use of an air turbine handpiece and air syringe for the tooth extraction. It is advised that air turbine handpieces and air syringes not be used during minor oral surgical procedures.

Differentiation between tuberculosis and lymphoma in mediastinal lymph nodes: Evaluation with contrast-enhanced MDCT

International Nuclear Information System (INIS)

Tang, S.-S.; Yang, Z.-G.; Deng, W.; Shao, H.; Chen, J.; Wen, L.-Y.

2012-01-01

Aim: To determine the specific imaging criteria on contrast-enhanced multidetector computed tomography (MDCT) for differentiating between tuberculosis and lymphoma in mediastinal lymph nodes. Materials and methods: The anatomical distribution and enhancement patterns of mediastinal lymph nodes on contrast-enhanced MDCT were reviewed in 37 patients with tuberculosis and 54 patients with lymphoma. Of the patients with lymphoma, 18 had Hodgkin's disease and 36 had non-Hodgkin's lymphoma. Results: Region 10R was involved more often in tuberculosis than in Hodgkin's disease and non-Hodgkin's lymphoma. Region 6 had a higher tendency to be affected in Hodgkin's disease and non-Hodgkin's lymphoma compared with tuberculosis. Tuberculosis showed peripheral enhancement in 78% of cases, frequently with a multilocular appearance, compared to Hodgkin's disease and non-Hodgkin's lymphoma, which showed peripheral enhancement in only 6 and 3% of cases, respectively. Homogeneous enhancement was more commonly seen in lymphoma (83% for Hodgkin's disease, and 83% for non-Hodgkin's lymphoma) than in tuberculosis (8%). In the determination of tuberculosis, results showed that when a peripheral enhancement pattern was seen, sensitivity was 78%, specificity was 96%, and accuracy was 89%. In the determination of lymphoma, results showed that when a homogeneous enhancement pattern was seen, sensitivity was 83%, specificity was 92%, and accuracy was 87%. Conclusion: The findings of the present study indicate that specific anatomical distribution and enhancement patterns of lymphadenopathy shown on contrast-enhanced MDCT can be useful in differentiating tuberculosis from lymphoma of mediastinal lymph nodes.

Mediastinal lymph node detection and station mapping on chest CT using spatial priors and random forest

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Liu, Jiamin; Hoffman, Joanne; Zhao, Jocelyn; Yao, Jianhua; Lu, Le; Kim, Lauren; Turkbey, Evrim B.; Summers, Ronald M., E-mail: rms@nih.gov [Imaging Biomarkers and Computer-aided Diagnosis Laboratory, Radiology and Imaging Sciences, National Institutes of Health Clinical Center Building, 10 Room 1C224 MSC 1182, Bethesda, Maryland 20892-1182 (United States)

2016-07-15

Purpose: To develop an automated system for mediastinal lymph node detection and station mapping for chest CT. Methods: The contextual organs, trachea, lungs, and spine are first automatically identified to locate the region of interest (ROI) (mediastinum). The authors employ shape features derived from Hessian analysis, local object scale, and circular transformation that are computed per voxel in the ROI. Eight more anatomical structures are simultaneously segmented by multiatlas label fusion. Spatial priors are defined as the relative multidimensional distance vectors corresponding to each structure. Intensity, shape, and spatial prior features are integrated and parsed by a random forest classifier for lymph node detection. The detected candidates are then segmented by the following curve evolution process. Texture features are computed on the segmented lymph nodes and a support vector machine committee is used for final classification. For lymph node station labeling, based on the segmentation results of the above anatomical structures, the textual definitions of mediastinal lymph node map according to the International Association for the Study of Lung Cancer are converted into patient-specific color-coded CT image, where the lymph node station can be automatically assigned for each detected node. Results: The chest CT volumes from 70 patients with 316 enlarged mediastinal lymph nodes are used for validation. For lymph node detection, their system achieves 88% sensitivity at eight false positives per patient. For lymph node station labeling, 84.5% of lymph nodes are correctly assigned to their stations. Conclusions: Multiple-channel shape, intensity, and spatial prior features aggregated by a random forest classifier improve mediastinal lymph node detection on chest CT. Using the location information of segmented anatomic structures from the multiatlas formulation enables accurate identification of lymph node stations.

Mediastinal lymph node detection and station mapping on chest CT using spatial priors and random forest

International Nuclear Information System (INIS)

Liu, Jiamin; Hoffman, Joanne; Zhao, Jocelyn; Yao, Jianhua; Lu, Le; Kim, Lauren; Turkbey, Evrim B.; Summers, Ronald M.

2016-01-01

Purpose: To develop an automated system for mediastinal lymph node detection and station mapping for chest CT. Methods: The contextual organs, trachea, lungs, and spine are first automatically identified to locate the region of interest (ROI) (mediastinum). The authors employ shape features derived from Hessian analysis, local object scale, and circular transformation that are computed per voxel in the ROI. Eight more anatomical structures are simultaneously segmented by multiatlas label fusion. Spatial priors are defined as the relative multidimensional distance vectors corresponding to each structure. Intensity, shape, and spatial prior features are integrated and parsed by a random forest classifier for lymph node detection. The detected candidates are then segmented by the following curve evolution process. Texture features are computed on the segmented lymph nodes and a support vector machine committee is used for final classification. For lymph node station labeling, based on the segmentation results of the above anatomical structures, the textual definitions of mediastinal lymph node map according to the International Association for the Study of Lung Cancer are converted into patient-specific color-coded CT image, where the lymph node station can be automatically assigned for each detected node. Results: The chest CT volumes from 70 patients with 316 enlarged mediastinal lymph nodes are used for validation. For lymph node detection, their system achieves 88% sensitivity at eight false positives per patient. For lymph node station labeling, 84.5% of lymph nodes are correctly assigned to their stations. Conclusions: Multiple-channel shape, intensity, and spatial prior features aggregated by a random forest classifier improve mediastinal lymph node detection on chest CT. Using the location information of segmented anatomic structures from the multiatlas formulation enables accurate identification of lymph node stations.

Paradoxical signal pattern of mediastinal cysts on T2-weighted MR imaging: phantom and clinical study

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Ueda, Ken, E-mail: k-ueda@radiol.med.osaka-u.ac.jp [Department of Radiology, Osaka University Graduate School of Medicine, 2-2 Yamadaoka, Suita-city, Osaka 565-0871 (Japan); Yanagawa, Masahiro [Department of Radiology, Osaka University Graduate School of Medicine, 2-2 Yamadaoka, Suita-city, Osaka 565-0871 (Japan); Ueguchi, Takashi [Department of Medical Physics and Engineering, Osaka University Graduate School of Medicine, 2-2 Yamadaoka, Suita-city, Osaka 565-0871 (Japan); Satoh, Yukihisa; Kawai, Misa; Gyobu, Tomoko; Sumikawa, Hiromitsu; Honda, Osamu; Tomiyama, Noriyuki [Department of Radiology, Osaka University Graduate School of Medicine, 2-2 Yamadaoka, Suita-city, Osaka 565-0871 (Japan)

2014-06-15

Purpose: To evaluate the intracystic MRI (magnetic resonance imaging) signal intensity of mediastinal cystic masses on T2-weighted images. Materials and methods: A phantom study was performed to evaluate the signal intensity of a mediastinal cystic mass phantom (rubber balloon containing water) adjacent to a cardiac phantom pulsing at the rate of 60/min. T2-weighted images (sequence, fast spin echo [FSE] and single shot fast spin echo [SSFSE]) were acquired for the mediastinal cystic mass phantom. Further, a clinical study was performed in 33 patients (16 men, 17 women; age range, 19-85 years; mean, 65years) with thymic cysts or pericardial cysts. In all patients, T2-weighted images (FSE and SSFSE) were acquired. The signal intensity of cystic lesion was evaluated and was compared with that of muscle. A region of interest (ROI) was positioned on the standard MR console, and signal intensity of the cystic mass (cSI), that of the muscle (mSI), and the rate of absolute value of cSI–mSI to standard deviation (SD) of background noise (|cSI–mSI|/SD = CNR [contrast-to-noise ratio]) were measured. Results: The phantom study demonstrated that the rate phantom-ROI/saline-ROI was higher in SSFSE (0.36) than in FSE (0.19). In clinical cases, the degree of the signal intensity was higher in SSFSE than in FSE. The CNR was significantly higher in SSFSE (mean ± standard deviation, 111.0 ± 47.6) than in FSE (72.8 ± 36.6) (p < 0.001, Wilcoxon signed-rank test). Conclusions: Anterior mediastinal cysts often show lower signal intensity than the original signal intensity of water on T2-weighted images. SSFSE sequence reduces this paradoxical signal pattern on T2-weighted images, which may otherwise cause misinterpretation when assessing cystic lesions.

Paradoxical signal pattern of mediastinal cysts on T2-weighted MR imaging: phantom and clinical study

International Nuclear Information System (INIS)

Ueda, Ken; Yanagawa, Masahiro; Ueguchi, Takashi; Satoh, Yukihisa; Kawai, Misa; Gyobu, Tomoko; Sumikawa, Hiromitsu; Honda, Osamu; Tomiyama, Noriyuki

2014-01-01

Purpose: To evaluate the intracystic MRI (magnetic resonance imaging) signal intensity of mediastinal cystic masses on T2-weighted images. Materials and methods: A phantom study was performed to evaluate the signal intensity of a mediastinal cystic mass phantom (rubber balloon containing water) adjacent to a cardiac phantom pulsing at the rate of 60/min. T2-weighted images (sequence, fast spin echo [FSE] and single shot fast spin echo [SSFSE]) were acquired for the mediastinal cystic mass phantom. Further, a clinical study was performed in 33 patients (16 men, 17 women; age range, 19-85 years; mean, 65years) with thymic cysts or pericardial cysts. In all patients, T2-weighted images (FSE and SSFSE) were acquired. The signal intensity of cystic lesion was evaluated and was compared with that of muscle. A region of interest (ROI) was positioned on the standard MR console, and signal intensity of the cystic mass (cSI), that of the muscle (mSI), and the rate of absolute value of cSI–mSI to standard deviation (SD) of background noise (|cSI–mSI|/SD = CNR [contrast-to-noise ratio]) were measured. Results: The phantom study demonstrated that the rate phantom-ROI/saline-ROI was higher in SSFSE (0.36) than in FSE (0.19). In clinical cases, the degree of the signal intensity was higher in SSFSE than in FSE. The CNR was significantly higher in SSFSE (mean ± standard deviation, 111.0 ± 47.6) than in FSE (72.8 ± 36.6) (p < 0.001, Wilcoxon signed-rank test). Conclusions: Anterior mediastinal cysts often show lower signal intensity than the original signal intensity of water on T2-weighted images. SSFSE sequence reduces this paradoxical signal pattern on T2-weighted images, which may otherwise cause misinterpretation when assessing cystic lesions

Identificación y cuantificación de contaminantes emergentes en aguas residuales por microextracción en fase sólida-cromatografía de gases espectrometría de masas (MEFS-CG-EM

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Araceli Peña-Álvarez

2015-01-01

Full Text Available Se desarrolló y optimizó un método por Microextracción en Fase Sólida seguido de Cromatografía de Gases- Espectrometría de Masas (MEFS-CG-EM para la determinación de ibuprofeno, naproxeno, clorofeno, triclosán y bisfenol A catalogados dentro de los contaminantes emergentes o productos farmacéuticos de cuidado personal (PPCP's, por sus siglas en inglés en aguas residuales. La extracción de los analitos se realizó por MEFS utilizando una fibra de polietilenglicol (PEG, agitación a 1,200 rpm y 30 min de extracción a temperatura ambiente, 50% NaCl y pH=3, seguida de la derivatización en fibra con N-metil-N-t-butildimetilsililtrifluoroacetamida (MTBSTFA. La identificación de cada compuesto se realizó por la comparación del tiempo de retención y de su espectro de masas con los de su correspondiente estándar derivatizado. La cuantificación se efectuó por monitoreo selectivo de iones (SIM. El método desarrollado presentó aceptable linealidad en el intervalo de concentración de 1.0-118.90 pg/mL para el ibuprofeno, 48.0-1488 pg/mL para el naproxeno, 4.40-140.8 pg/mL para el triclosán, 1.0-58.32 pg/mL para el clorofeno y 1.0-59.16 pg/mL para el bisfenol A, con coeficientes de correlación (r mayores a 0.99. Se analizaron muestras de influentes y efluentes de tres plantas de tratamiento de agua residual del sur de la ciudad: Ciudad Universitaria, Coyoacán y Cerro de la Estrella, pertenecientes al Sistema de Aguas de la Zona metropolitana de la Ciudad de México. Se demostró en este trabajo que la MEFS es una técnica de preparación de muestra simple, reproducible, sensible y rápida, ya que reduce etapas al extraer y concentrar simultáneamente, sin el uso de disolventes orgánicos, de fácil manejo y con un montaje experimental sencillo.

Impacto de la educación participativa en el índice de masa corporal y glicemia en individuos obesos con diabetes tipo 2 Impact of participatory education on body mass index and blood glucose in obese type-2 diabetics

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Carlos Enrique Cabrera-Pivaral

2004-02-01

Full Text Available La obesidad eleva el riesgo de morbilidad y mortalidad y se ha relacionado con los hábitos alimentarios y estos con la educación en salud. Esta última tiene como propósito promover la participación de los enfermos en mejorar los comportamientos humanos y estilos de vida saludables y mostrar las ventajas de la educación participativa en la modificación del Índice de Masa Corporal (IMC en el diabético obeso tipo 2. Se realizó un estudio cuasi experimental con asignación aleatoria de dos grupos de pacientes diabéticos obesos. La intervención educativa-participativa se organizó mediante el proceso de reflexión-acción. Se efectuaron mediciones del IMC basal y mensuales durante los 9 meses de la intervención educativa. Los grupos fueron controlados tomando en cuenta edad y sexo. El análisis estadístico se efectuó con el estadígrafo de t de students con diferencia de media para grupos relacionados. El grupo control logra un valor promedio de IMC basal de 33.89 ± 1.96 y al final de 33.2 ± 2.15 (t: 22.4; p: 0.16, el grupo de experimento con valor inicial de 33.63 ± 2.12 y final de 31.54 ± 1.71 (t: 11.55; p = 0.003. La intervención educativa participativa contribuye a mejorar el nivel de IMC en los diabéticos obesos 2.Exogenous obesity increases morbidity and mortality risk and has been associated with nutritional habits, which in turn can be affected by health education. Health education aims to promote patient participation in achieving behavior change and healthy lifestyles. The objective of this study is to show the advantages of participatory education in the modification of body mass index (BMI in obese type-2 diabetics. A quasi-experimental study was performed with random allocation of two patient groups. The educational intervention was organized through a reflection-action process. BMI was measured at baseline and then monthly for 9 months during the intervention. The groups were analyzed by age and sex. Statistical

PET/CT in breast carcinoma, combined with sarcoidosis, imitating mediastinal lymph node metastases

International Nuclear Information System (INIS)

Garcheva, M.; Hadhyiska, V.; Bochev, P.

2013-01-01

PET/CT is a high sensitive, but low-specific method visualizing all the metabolic active processes. Fluoro-deoxyglucose (18F-FDG) uptake is high in tumors, as well as in infections, inflammations, granulomatous processes, post-radiotherapy alterations and in activated organs and tissues like brown fat, adrenals, thyroid, thymus, or bone marrow. This uptake can represent differential diagnostic problem. The clinical case is a young patient with invasive ductal and lobular breast carcinoma, after sectorial resection, without lymph node dissection. The chemotherapy was stopped after 3 courses due to thrombosis of vena cephalica. The local clinical status raises suspicion of recurrence, as the ultrasound. PET/CT was not conclusive about mediastinal lymph node involvement. The histology proves sarcoidosis, which frequently demonstrates symmetric 18F-FDG avid mediastinal and hilar lymph nodes. However the biopsy is mandatory, because of the low specificity of PET/CT for discrimination of this systemic disorder from tumor involvement. Keywords: PET/CT. Differential Diagnostic Problems

Oxidación en vapor de agua a 700 ºC y 750 ºC del acero inoxidable AISI 317 recubierto con aluminio por CVD-FBR.

OpenAIRE

Jose L. Marulanda; Saul I. Castañeda; Aduljay Remolina

2014-01-01

Se realizó la oxidación del acero inoxidable austenítico AISI 317 recubierto con aluminio por deposición química de vapor en lecho fluidizado, a temperaturas de 700 °C y 750ºC, en un ambiente con 100% vapor de agua, para evaluar su comportamiento. Se realizaron curvas de ganancia de masa y las películas de óxidos se analizaron por medio de SEM y difracción de rayos X, para observar la morfología de los óxidos. Se realizó la simulación termodinámica del proceso de oxidación en vapor de agua de...

Evaluation of the avidin/biotin-liposome system injected in pleural space and peritoneum for drug delivery to mediastinal lymph nodes

Science.gov (United States)

Medina-Velazquez, Luis Alberto

The avidin/biotin-liposome system is a new modality recently developed for targeting lymph nodes through the lymphatic system after local injection in a cavity as the route of delivery. In this dissertation we show that the avidin/biotin-liposome system has potential advantages over the injection of only liposomes for targeting lymph nodes. A goal of this dissertation was to evaluate the potential of pleural space as a route of transport for the targeting of mediastinal nodes. Another objective was to study the role of the injected dose of the avidin/biotin-liposome system for targeting mediastinal nodes. Dose, volume, site and sequence of injection of the agents were studied as factors that play an important role in the lymphatic targeting and in the organ distribution of liposomes after intracavitary injection of the avidin/biotin-liposome system. The hypothesis tested in this dissertation was that intracavitary injection of the avidin/biotin-liposome system in pleural space and/or peritoneum results in high levels of mediastinal node targeting with a significant reduction of unfavorable organ distribution when compared with the injection of only liposomes. The specific aims of this dissertation were: (1) to determine the pharmacokinetics, mediastinal node targeting, and biodistribution of avidin and biotin-liposomes injected individually in pleural and peritoneal space, (2) to determine the effect of injected dose and volume on the targeting of mediastinal nodes after intrapleural injection of the avidin/biotin-liposome system, and (3) to evaluate the dose effect of the avidin/biotin-liposome system on the targeting of mediastinal nodes and the lymphatics that drain the peritoneum and pleural space by injecting one agent in peritoneum and the corresponding agent in pleural space, and vice versa. To perform these studies, scintigraphic images were acquired with a gamma camera to non-invasively follow the pharmacokinetics and organ uptake of the avidin

¿Qué hacen los públicos infantiles con la televisión?

OpenAIRE

Quiroga Macleimont, Sergio Ricardo

2005-01-01

La televisión es un medio absorbente, de poderosa penetración y se ha convertido en una herramienta de cultura e interacción social. En los años 60 la investigación sobre televisión y niños se realiza bajo las líneas de investigación dominantes: la investigación americana en comunicación de masas, la óptica estructural semiótica francesa, la crítica ideológica con raíces marxistas y de la teoría de la dependencia. Sin embargo, la preocupación acerca de la influencia de la televisión ...

Mediastinal lymphadenopathy in congestive heart failure: a sequential CT evaluation with clinical and echocardiographic correlations

International Nuclear Information System (INIS)

Chabbert, Valerie; Canevet, Guillaume; Otal, Philippe; Joffre, Francis; Baixas, Cecile; Galinier, Michel; Deken, Valerie; Duhamel, Alain; Remy, Jacques; Remy-Jardin, Martine

2004-01-01

The aim of this study was to evaluate the frequency and evolution after treatment of mediastinal lymphadenopathy associated with congestive left heart failure on CT scans in correlation with clinical and echocardiographic findings. Thirty-one consecutive patients with subacute left heart failure underwent a clinical evaluation using the NYHA classification, a CT examination, and transthoracic echocardiography at the time of initial presentation (T1). After initiation of medical treatment (T2), follow-up CT scans were systematically obtained together with a clinical evaluation. At T1, all patients showed severe (type III: n=12, 39%; type IV: n=12, 39%) to moderate (type I, n=1, 3%; type II, n=6, 19%) dyspnea with a mean ejection fraction of 39% (range 22-74%). On initial CT scans, enlarged mediastinal lymph nodes were seen in 13 patients (42%) with blurred contours in 5 patients (16%) and hazy mediastinal fat in 1 patient (3%). Significant decrease in the size of lymphadenopathy was observed between T1 and T2 (T1, n=13, 42% vs T2, n=10, 32%; p<0.05) with a concurrent decrease in the severity of dyspnea (grade III-IV dyspnea at T1, n=24, 78% vs grade I-II dyspnea at T2, n=26, 83.5%). Patients with enlarged lymph nodes at T1 showed: (a) a significantly lower ejection fraction at echocardiography than those without lymphadenopathy (mean±SD value: 34±12.9 vs 43±13.8%; p=0.04); (b) a significantly larger diameter of the right superior pulmonary vein (mean±SD value: 17±2.75 vs 14±3.9 mm; p=0.04); and (c) a higher frequency of abnormal peribronchovascular thickening (n=5 vs n=1; p=0.06). Mediastinal lymphadenopathy associated with subacute left heart failure was observed in 13 patients (42%), showing regression after initiation of treatment in 8 of 13 patients (62%). (orig.)

Mediastinal lymphadenopathy in congestive heart failure: a sequential CT evaluation with clinical and echocardiographic correlations

Energy Technology Data Exchange (ETDEWEB)

Chabbert, Valerie; Canevet, Guillaume; Otal, Philippe; Joffre, Francis [Department of Radiology, University of Toulouse, Avenue Jean-Poulhes, 31403, Toulouse (France); Baixas, Cecile; Galinier, Michel [Department of Cardiology, University of Toulouse, Avenue Jean-Poulhes, 31403, Toulouse (France); Deken, Valerie; Duhamel, Alain [Department of Medical Statistics, University of Lille, Place de Verdun, 59037, Lille Cedex (France); Remy, Jacques; Remy-Jardin, Martine [Department of Radiology, Hospital Calmette, University Center of Lille, Boulevard Jules Leclerc, 59037, Lille Cedex (France)

2004-05-01

The aim of this study was to evaluate the frequency and evolution after treatment of mediastinal lymphadenopathy associated with congestive left heart failure on CT scans in correlation with clinical and echocardiographic findings. Thirty-one consecutive patients with subacute left heart failure underwent a clinical evaluation using the NYHA classification, a CT examination, and transthoracic echocardiography at the time of initial presentation (T1). After initiation of medical treatment (T2), follow-up CT scans were systematically obtained together with a clinical evaluation. At T1, all patients showed severe (type III: n=12, 39%; type IV: n=12, 39%) to moderate (type I, n=1, 3%; type II, n=6, 19%) dyspnea with a mean ejection fraction of 39% (range 22-74%). On initial CT scans, enlarged mediastinal lymph nodes were seen in 13 patients (42%) with blurred contours in 5 patients (16%) and hazy mediastinal fat in 1 patient (3%). Significant decrease in the size of lymphadenopathy was observed between T1 and T2 (T1, n=13, 42% vs T2, n=10, 32%; p<0.05) with a concurrent decrease in the severity of dyspnea (grade III-IV dyspnea at T1, n=24, 78% vs grade I-II dyspnea at T2, n=26, 83.5%). Patients with enlarged lymph nodes at T1 showed: (a) a significantly lower ejection fraction at echocardiography than those without lymphadenopathy (mean{+-}SD value: 34{+-}12.9 vs 43{+-}13.8%; p=0.04); (b) a significantly larger diameter of the right superior pulmonary vein (mean{+-}SD value: 17{+-}2.75 vs 14{+-}3.9 mm; p=0.04); and (c) a higher frequency of abnormal peribronchovascular thickening (n=5 vs n=1; p=0.06). Mediastinal lymphadenopathy associated with subacute left heart failure was observed in 13 patients (42%), showing regression after initiation of treatment in 8 of 13 patients (62%). (orig.)

Relación entre síntomas depresivos, Índice de Masa Corporal y autopercepción del peso en adolescentes escolares

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Edwin Herazo

2013-01-01

Full Text Available Objetivo: Conocer la asociación entre síntomas depresivos, índice de masa corporal (IMC y autopercepción del peso corporal en adolescentes escolares de Bogotá, D.C. (Colombia. Materiales y métodos: Se realizó un estudio analítico transversal en el que participaron estudiantes de colegios públicos. Los síntomas depresivos se cuantificaron con la versión de 10 ítems de la escala de Zung para depresión; el IMC a partir de la toma de peso y talla; y la autopercepción de peso corporal mediante una pregunta con tres opciones de respuesta (0=bajo, normal=1 y alto=2. Se calculó el coeficiente de correlación de Spearman (rs para estimar las asociaciones. Se aceptaron como significativos valores de rs mayores de 0,300. Resultados: Participaron 321 estudiantes, con edades entre 12 y 18 años, media=14.6 años (DE=1,6; el 64,2 % fueron mujeres. Las puntuaciones para síntomas depresivos se encontraron entre 10 y 36, media=20,6 (DE=4,7, moda=21, mediana=21; los IMC se observaron entre 14,5 y 29,8, media=20,5 (DE=3,0; y la autopercepción del peso fue baja en 15,0 %, normal en 71,0 % y alta en 14,0 %. La correlación entre síntomas depresivos y autopercepción del peso fue rs=-0,019 (p=0,740; entre síntomas depresivos e IMC, rs=- 0,098 (p=0,079; y entre IMC y autopercepción de peso, rs=0,446 (p<0,001. Conclusiones: El IMC guarda una relación estadísticamente significativa con la auto- percepción del peso corporal; sin embargo, los síntomas depresivos son independientes de la autopercepción del peso corporal. Se necesitan más investigaciones con adolescentes escolares colombianos.

Intraluminar testicular colonization and differentiation of the inner cell mass in mice (Mus Musculus Colonización intraluminar testicular y diferenciación de la masa celular interna en ratones (Mus musculus

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Láyonal Acosta

2012-02-01

Full Text Available Primordial germ cells (PGC`s are transplanted to testicle of other individual of the same species, they colonize the lumen of the seminiferous tubules, seeking a niche to differentiate into sperm. Our objective was to evaluate the intraluminal colonization of a suspension of cells in the inner cell mass (IMC`s of blastocysts obtained from mice, using a novel technique. It was transplanted a suspension of ICM by mean of inmunosurgery into the rete testis of recipient animals which were previously treated with cyclophosphamide to reduce their own spermatogenesis. We confirmed the presence of intraluminal minitubules in 2 of 100 seminiferous tubules, demonstrating that transplantation of a suspension of cells from the inner cell mass can colonize the seminiferous tubules and also maintain a synchronously xenogenic spermatogenesis with the receiver.Cuando las células germinales primordiales (CGPs son trasplantadas al testículo de otro individuo de la misma especie; colonizan el lumen de los túbulos seminíferos, buscando su nicho para diferenciarse en espermatozoides. Nuestro objetivo fue evaluar la colonización intraluminal de una suspensión de células de la masa celular interna (MCI obtenidas de blastocistos de ratones. Una suspensión de MCI obtenidos mediante una inmunocirugía en la red testicular de animales tratados previamente con ciclofosfamida para disminuir su propia espermatogénesis fueron trasladados a animales receptores. Se comprobó la presencia de minitúbulos intraluminales en 2 de 100 túbulos seminíferos, lo que demuestra que el trasplante de una suspensión de células de la masa celular interna pueden colonizar los túbulos seminíferos y además mantener una espermatogénesis xenogénica de manera sincrónica con el receptor.

Mediastinal Cystic Lymphangioma in a Patient with Situs Inversus Totalis

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Teruya Komatsu

2014-01-01

Full Text Available We present a case of cystic lymphangioma of the mediastinum complicated with situs inversus totalis. The 70-year-old man underwent thoracoscopic resection of a mediastinal cystic tumor, which was diagnosed as cystic lymphangioma. Cystic lymphangiomas are congenital cystic abnormalities of the lymphatic system. The head and neck area is often involved while the mediastinum is rarely affected. The rarity of this case is further attributed to the coexistence of situs inversus totalis.

Freud y el estado de la cuestión. Psicología de las masas y análisis del Yo.

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Ángela María Jaramillo.

2004-03-01

Full Text Available El interés básico de este texto es esclarecer cómo se conduce Freud en el establecimiento de lo que se ha nombrado como estado de la cuestión, particularmente en el texto Psicología de las masas y análisis del yo. Sólo voy a referirme a los apartados:- Le Bon y su descripción del alma de las masas.- Otras apreciaciones de la vida anímica colectiva.- Sugestión y libido.

Freud y el estado de la cuestión. Psicología de las masas y análisis del Yo.

OpenAIRE

Ángela María Jaramillo.

2004-01-01

El interés básico de este texto es esclarecer cómo se conduce Freud en el establecimiento de lo que se ha nombrado como estado de la cuestión, particularmente en el texto Psicología de las masas y análisis del yo. Sólo voy a referirme a los apartados:- Le Bon y su descripción del alma de las masas.- Otras apreciaciones de la vida anímica colectiva.- Sugestión y libido.

Pericardial cyst with atypical location: densimetric evaluation of mediastinal masses by computerized tomography

International Nuclear Information System (INIS)

Franquet, T.; Jiminez, F.J.; Eguizabal, C.; Bescos, J.M.

1991-01-01

We present a case of pericardial cyst with atypical location. CT has been very usefull for densitometric evaluation of mediastinal masses. Using a combination of cross-section diagnostic methods and fine-needle aspiration (FNA), we can carry out accurate diagnoses of cystic lesions located in uncommom sites. (Author)

Repair of tracheomalacia with inflammatory defect and mediastinitis.

Science.gov (United States)

Sandu, Kishore; Monnier, Yan; Hurni, Michel; Bernath, Marc-Andre; Monnier, Philippe; Wang, Yabo; Ris, Hans-Beat

2011-01-01

We describe a novel repair of an anterior inflammatory tracheal defect with mediastinitis, which occurred after external tracheal suspension of localized intrathoracic tracheomalacia. The malacic tracheal segment of 4-cm length containing the inflammatory tracheal defect was noncircumferentially resected. A temporary endotracheal silicone stent was introduced, and the trachea was closed by a pedicled pectoralis muscle flap reinforced with an embedded rib segment. Retrieval of the stent 5 months postoperatively resulted in a re-epithelialized, persistently stable, noncollapsible tracheal segment that showed the same diameter and configuration as the nonreconstructed part of the trachea. Copyright © 2011 The Society of Thoracic Surgeons. Published by Elsevier Inc. All rights reserved.

Reliable and valid assessment of competence in endoscopic ultrasonography and fine-needle aspiration for mediastinal staging of non-small cell lung cancer

DEFF Research Database (Denmark)

Konge, Lars; Vilmann, P; Clementsen, P

2012-01-01

Fine-needle aspiration (FNA) guided by endoscopic ultrasonography (EUS) is important in mediastinal staging of non-small cell lung cancer (NSCLC). Training standards and implementation strategies of this technique are currently under discussion. The aim of this study was to explore the reliabilit...... and validity of a newly developed EUS Assessment Tool (EUSAT) designed to measure competence in EUS - FNA for mediastinal staging of NSCLC....

The role of Endobronchial ultrasound guided transbronchial needle aspiration (EBUS-TBNA) for qualitative diagnosis of mediastinal and hilar lymphadenopathy: a prospective analysis

International Nuclear Information System (INIS)

Ye, Ting; Hu, Hong; Luo, Xiaoyang; Chen, Haiquan

2011-01-01

Recently EBUS-TBNA, which has a sensitivity of 94.6%, specificity of 100% and diagnostic accuracy rate of 96.3% as previously reported, has been widely used for patients with mediastinal and hilar lymphadenopathy or suspected lung cancer to get accurate diagnosis. The purpose of the current study was to evaluate the usefulness of EBUS-TBNA in obtaining cytological and histological diagnosis of mediastinal and hilar lymph nodes compared to the results obtained with conventional mediastinoscopy as previously reported, and to assess the relationship of diagnostic accuracy and number of passes and size of lymph nodes. 101 patients with mediastinal and hilar lymphadenopathy or suspected lung cancer in our institution were included in this prospective study. EBUS-TBNA was performed in all cases. The final diagnosis was confirmed by cytology, surgical results, and/or clinical follow-up for at least 6 months. Sensitivity, specificity, accuracy, and positive and negative predictive values were calculated using standard formulas. In 101 patients, EBUS-TBNA was successfully performed to obtain samples from 225 lymph nodes, 7 lung masses, 1 mediastinal mass and 2 esophageal masses. 63 malignant tumors and 38 benign diseases were confirmed. Epidermal growth factor receptor mutation was detected in 10 biopsy samples, and epidermal growth factor receptor mutation was detected in 4 cases. With respect to the correct diagnosis of mediastinal and hilar lymphadenopathy, EBUS-TBNA had a sensitivity of 95.08%, specificity of 100%, positive predictive value of 100%, negative predictive value of 93.02%, and overall accuracy of 97.02%. The relationship of diagnostic accuracy and number of lymph node passes or size of lymph nodes was both insignificant (p = 0.27; p = 0.23). The procedure was uneventful without complications. EBUS-TBNA is an accurate and safe tool in diagnosis of mediastinal and hilar lymphadenopathy. It cannot completely replace mediastinoscopy, it may indeed reduce the

La cultura de masas como el nuevo opio del pueblo

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Correa García, Ramón Ignacio; Martínez Mojarro, Mª Eugenia; Martínez Mojarro, Natalia

2001-01-01

La cultura de masas, así como otros sistemas doctrinarios que forman parte de la vida de los ciudadanos de la sociedad actual conforman reglas de pensamiento y estilos de vida. Los autores plantean una reflexión sobre la hegemonía incontestable de los Estados Unidos y llega a la conclusión de que una realidad impuesta sutilmente consigue anestesiar la conciencia crítica de las personas a la vez que impide ver otras realidades. La cuestión final a la que se abre esta colaboración es la que se ...

Incertidumbre de la medición de masa en la determinación de los parámetros de consumo de electrodos de recargue Measurement uncertainty of mass in the determination of the consumption parameters of hardfacing electrodes

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Rosenda Valdés Arencibia

2013-06-01

Full Text Available Este trabajo presenta la evaluación de la incertidumbre de las mediciones realizadas para la determinación de los parámetros de consumo de electrodos de recargue, dando énfasis a la medición de masa. Para ello fueron realizados tres depósitos a tres niveles de corriente (120 A, 145 A y 160 A, respectivamente, registrándose el tiempo de soldadura, la longitud del cordón, así como la masa inicial y final de las probetas y de los electrodos. A partir de los datos anteriores fueron determinados los parámetros de consumo. Fue calculada la incertidumbre asociada a la masa de las probetas, a la masa consumida del electrodo, a la masa depositada y a los parámetros de consumo. Al finalizar el trabajo se comprobó que el rendimiento del depósito muestra un comportamiento decreciente con la corriente, siendo el mejor resultado de (74,12 % para una corriente de soldadura de 120 A. Los valores de incertidumbre expandida para el rendimiento varían entre 1,47 % y 2,41 %, para la tasa de consumo fueron obtenidos valores entre 0,4 g/min y 0,6 g/min, mientras que para la tasa de deposición la incertidumbre varía de 0,6 g/min a 0,7 g/min.This work presents the evaluation of the uncertainty of the measurements to determine the consumption parameters of hardfacing electrode, emphasizing the mass measurement. The experimentation was carried out obtaining deposits at three levels of current (120 A, 145 A y 160 A and measuring the time spent in welding, the length of the welds the test plate and electrode mass (initial and final. Based on these results, the consumption parameters were also determined. The uncertainty related to the measurements the mass of the samples, the mass consumption of the electrode, the deposited mass and consumption parameters was determined. The results showed that the deposition efficiency increase as a function of the current, turning the best result (74.12 % at 120 A. The expanded measurement uncertainty associated to

Ependimoma celular parcialmente resecado complicado con meningoependimocoroiditis bacteriana por Pseudomonas aeruginosa e infección sistémica por citomegalovirus

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Francisco Javier Otero-Mendoza

2017-06-01

Full Text Available Niño de 1 año 10 meses de edad, originario de Irapuato, Guanajuato, sin antecedentes de importancia para el padecimiento actual. Inició dos meses previos a su ingreso con crisis convulsivas tónico-clónicas generalizadas de 15 segundos de duración durante el sueño. Se realizó electroencefalograma que reportó actividad epileptiforme, por lo que se dio tratamiento con ácido valproico. Una semana previa al ingreso se agregó ataxia troncal impidiendo la marcha, por lo que se realizó una tomografía axial computarizada de cráneo en la que se observó un tumor en fosa posterior con densidad heterogénea y áreas de necrosis central que obliteraba el cuarto ventrículo, ocasionando efecto de masa y desplazamiento ventral del tallo cerebral. Por tal motivo, fue referido a nuestra institución.

[A comparative study of Da Vinci robot system with video-assisted thoracoscopy in the surgical treatment of mediastinal lesions].

Science.gov (United States)

Ding, Renquan; Tong, Xiangdong; Xu, Shiguang; Zhang, Dakun; Gao, Xin; Teng, Hong; Qu, Jiaqi; Wang, Shumin

2014-07-20

In recent years, Da Vinci robot system applied in the treatment of intrathoracic surgery mediastinal diseases become more mature. The aim of this study is to summarize the clinical data about mediastinal lesions of General Hospital of Shenyang Military Region in the past 4 years, then to analyze the treatment effect and promising applications of da Vinci robot system in the surgical treatment of mediastinal lesions. 203 cases of mediastinal lesions were collected from General Hospital of Shenyang Military Region between 2010 and 2013. These patients were divided into two groups da Vinci and video-assisted thoracoscopic surgery (VATS) according to the selection of the treatments. The time in surgery, intraoperative blood loss, postoperative drainage amount within three days after surgery, the period of bearing drainage tubes, hospital stays and hospitalization expense were then compared. All patients were successfully operated, the postoperative recovery is good and there is no perioperative death. The different of the time in surgery between two groups is Robots group 82 (20-320) min and thoracoscopic group 89 (35-360) min (P>0.05). The intraoperative blood loss between two groups is robot group 10 (1-100) mL and thoracoscopic group 50 (3-1,500) mL. The postoperative drainage amount within three days after surgery between two groups is robot group 215 (0-2,220) mL and thoracoscopic group 350 (50-1,810) mL. The period of bearing drainage tubes after surgery between two groups is robot group 3 (0-10) d and thoracoscopic group: 5 (1-18) d. The difference of hospital stays between two groups is robot group 7 (2-15) d and thoracoscopic group 9 (2-50) d. The hospitalization expense between two groups is robot group (18,983.6±4,461.2) RMB and thoracoscopic group (9,351.9±2,076.3) RMB (All Pda Vinci robot system is safe and efficient in the treatment of mediastinal lesions compared with video-assisted thoracoscopic approach, even though its expense is higher.

Evaluación de modelos de turbulencia para predecir los flujos de masa de aire interzonas a través de una abertura de escalera para la convección natural y mixta en los edificios

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Sergio Vera

2015-08-01

Full Text Available El objetivo principal del diseño de edificios es el proveer ambientes interiores productivos, confortables y saludables para sus ocupantes en balance con la eficiencia energética. Aberturas interiores de edificios, tales como las de escaleras, son huellas importantes para el intercambio de calor, aire, humedad y contaminantes. Los flujos de aire interzonas a través de aberturas horizontales no han sido estudiados profundamente debido a su naturaleza transiente y altamente inestable, la complejidad para realizar experimentos, y la escasez de datos experimentales disponibles. La Dinámica de Fluidos Computacional (CFD por su acrónimo en inglés es una excelente herramienta para avanzar en la comprensión de este fenómeno. En este artículo, se aplica CFD para evaluar el desempeño de cinco modelos de turbulencia de dos ecuaciones: k-ε estándar, k-ε RNG, k-ε realizable, k-ω estándar y k-ω SST, para predecir las condiciones del aire interior y los flujos de la masa de aire ascendente que fluyen a través de una abertura horizontal en una casa de ensayos de dos pisos a escala real. La investigación incluye seis casos con diferentes gradientes de temperatura entre los dos pisos y tres estrategias de ventilación que representan convección natural y mixta. Los principales resultados muestran que las temperaturas son predichas correctamente por todos los modelos de turbulencia, mientras que las velocidades del aire simuladas presentan variaciones mayores entre los modelos de turbulencia evaluados. En general, los modelos k-s estándar y k-ε realizable son los más precisos para predecir las temperaturas interiores y las velocidades de aire para la convección natural y mixta, respectivamente. Además, los flujos de la masa de aire ascendente a través de la abertura horizontal estimados por ambos modelos de turbulencia concuerdan muy bien con los datos experimentales.

Detection of mediastinitis after heart transplantation by gallium-67 scintigraphy

International Nuclear Information System (INIS)

Quirce, R.; Serano, J.; Arnal, C.; Banzo, I.; Carril, J.M.

1991-01-01

We report the findings of a patient with post-cardiac transplant mediastinitis detected by 67 Ga-citrate imaging. Fever and leukocytosis were the first clinical signs suggesting infection. The usual diagnostic modalities, including CT and ultrasound, failed to identify the site of infection. A 67 Ga scan showed intense abnormal uptake behind the sternum. The site of uptake was shown by necropsy to be necrotic tissue involving cardiac sutures, pulmonary arteries, and the aorta due to infection with Haemophilus aphrophilus

KEBIJAKAN POLITIK LUAR NEGERI FILIPINA PADA MASA PEMERINTAHAN RODRIGO DUTERTE TENTANG LAUT CINA SELATAN

OpenAIRE

BEATRICE G. P., JENNIFER

2017-01-01

2017 Jennifer Beatrice Glorianna Putri, E131 13 308. ???Kebijakan Politik Luar Negeri Filipina Pada Masa Pemerintahan Rodrigo Duterte tentang Laut Cina Selatan???, dibawah bimbingan Patrice Lumumba, selaku Pembimbing I, dan Aswin Baharuddin, selaku Pembimbing II, pada Jurusan Ilmu Hubungan Internasional, Fakultas Ilmu Sosial dan Ilmu Politik, Universitas Hasanuddin. Penelitian ini bertujuan untuk mendeskripsikan kebijakan politik luar negeri Filipi...

Criptococoma pulmonar con invasión torácica en un varón inmunocompetente Pulmonary cryptococcoma with involvement of the chest wall in an immunocompetent patient

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Ana A. Pisarevsky

2010-04-01

Full Text Available La criptococosis pulmonar en pacientes inmunocompetentes es una entidad poco habitual y su presentación como masas de gran tamaño, con compromiso de la pared torácica y de los tejidos blandos vecinos, no la encontramos descriptas en nuestra revisión bibliográfica. La variedad gattii (serotipoB/C está acotada geográficamente a regiones tropicales y subtropicales y parece afectar preferentemente a individuos inmunocompetentes. Presentamos el caso de un hombre de 51 años proveniente del noreste de la Argentina, fumador de 10 atados/año que consulta por aumento del volumen del hombro izquierdo e impotencia funcional por intenso dolor de seis meses de evolución. Mediante una biopsia percutánea de la masa, se diagnostica Cryptococcus neoformans, variedad gattii. El paciente recibe terapéutica antifúngica, mostrando una evolución favorable con disminución progresiva de la masa.The pulmonary cryptococcosis in immunocompetent patients is unusual, and its presentation as large masses with involvement of the chest wall and the neighboring soft tissues has not been found in our bibliographic research. The variety gattii (serotype B/C is limited geographically to tropical and subtropical regions and appears to affect particularly immunocompetent individuals. We describe the case of a 51-year-old man from the Northeast of Argentina, with a history of smoking 10 pack/year. He presented an increased volume of the left shoulder and reported that for the last six months he had been unable to move it due to the pain. A percutaneous biopsy of the mass provided a diagnosis of Cryptococcus neoformans, variety gattii. The patient was treated with antifungal therapy showing a favourable outcome with a progressive decrease of the mass.

An Endoscopic Nasomediastinal Approach to a Mediastinal Abscess Developing after Zenker’s Diverticulectomy

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Fatih Altintoprak

2017-01-01

Full Text Available Zenker’s diverticulum is the most frequent symptomatic diverticulum of the esophagus, but the prevalence is <0.1%. The optimal treatment is surgery. Here, we present a nasomediastinal drainage approach to treatment of a mediastinal abscess, developing in the late postoperative period and attributable to leakage from the staple line.

Mediastinal lymph node enlargement on CT scans in idiopathic pulmonary fibrosis

International Nuclear Information System (INIS)

Ahn, Joong Mo; Im, Jung Gi; Yu, Kyu In; Kim, Hyeong Seog; Kim, Dae Young; Yu, Pil Mun

1992-01-01

The increase in size of lymph node on CT scan is the single most important finding of lymphadenopathy. The purpose of this study was to evaluate the size of mediastinal lymph nodes in patients with idiopathic pulmonary fibrosis with no evidence of malignancy or current infection. CT scans of 70 patients (16 with conventional CT and 54 with high-resolution CT) were assessed for lymph node size and location. The duration of symptoms, and the extent and pattern of the parenchymal lung disease on CT scans were correlated with lymph node enlargement. In 54 of 70 patients, more than one lymph nodes were large than 1-1.5 cm. The prevalence of node enlargement increased significant with a longer duration of symptom (p=0.001), large extent of the disease (p=0.043), and with a greater proportion of honeycomb pattern (p=0.033). Right paratracheal, subcarinal, right tracheobronchial, and paraesophageal nodes were the most common sites of node enlargement. In conclusion, mediastinal lymph node enlargement is common in patients with idiopathic pulmonary fibrosis and is more frequently seen in patients with a longer duration of clinical symptoms, greater extent of the disease, and with a larger proportion of honeycomb pattern

Mediastinal lymph node enlargement on CT scans in idiopathic pulmonary fibrosis

Energy Technology Data Exchange (ETDEWEB)

Ahn, Joong Mo; Im, Jung Gi; Yu, Kyu In; Kim, Hyeong Seog [Seoul National University College of Medicine, Seoul (Korea, Republic of); Kim, Dae Young [Chung Buk National University College of Medicine, Chungju (Korea, Republic of); Yu, Pil Mun [Dankuk University College of Medicine, Seoul (Korea, Republic of)

1992-09-15

The increase in size of lymph node on CT scan is the single most important finding of lymphadenopathy. The purpose of this study was to evaluate the size of mediastinal lymph nodes in patients with idiopathic pulmonary fibrosis with no evidence of malignancy or current infection. CT scans of 70 patients (16 with conventional CT and 54 with high-resolution CT) were assessed for lymph node size and location. The duration of symptoms, and the extent and pattern of the parenchymal lung disease on CT scans were correlated with lymph node enlargement. In 54 of 70 patients, more than one lymph nodes were large than 1-1.5 cm. The prevalence of node enlargement increased significant with a longer duration of symptom (p=0.001), large extent of the disease (p=0.043), and with a greater proportion of honeycomb pattern (p=0.033). Right paratracheal, subcarinal, right tracheobronchial, and paraesophageal nodes were the most common sites of node enlargement. In conclusion, mediastinal lymph node enlargement is common in patients with idiopathic pulmonary fibrosis and is more frequently seen in patients with a longer duration of clinical symptoms, greater extent of the disease, and with a larger proportion of honeycomb pattern.

Relación entre masa ósea y agilidad en personas mayores

OpenAIRE

A. Gómez-Cabello; G. Vicente-Rodríguez; A. González-Agüero; I. Ara; J. A. Casajús

2010-01-01

El objetivo de este estudio fue analizar la asociación entre masa ósea y agilidad en personas mayores. Se evaluó a 223 participantes mayores de 65 años (64 hombres y 159 mujeres) de Zaragoza (España). Se midió el área, contenido (CMO) y densidad mineral ósea (DMO) en el cuerpo completo, columna lumbar y cadera mediante absorciometría fotónica dual de rayos X (...

Diagnostic Yield and Safety of Endoscopic Ultrasound Guided Fine Needle Aspiration of Central Mediastinal Lung Masses

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Enrique Vazquez-Sequeiros

2013-01-01

Full Text Available Background and Aims. EUS-FNA is an accurate and safe technique to biopsy mediastinal lymph nodes. However, there are few data pertaining to the role of EUS-FNA to biopsy central lung masses. The aim of the study was to assess the diagnostic yield and safety of EUS-FNA of indeterminate central mediastinal lung masses. Methods. Design: Retrospective review of a prospectively maintained database; noncomparative. Setting: Tertiary referral center. From 10/2004 to 12/2010, all patients with a lung mass located within proximity to the esophagus were referred for EUS-FNA. Main Outcome Measurement: EUS-FNA diagnostic accuracy and safety. Results. 73 consecutive patients were included. EUS allowed detection in 62 (85% patients with lack of visualization prohibiting FNA in 11 patients. Among sampled lesions, one patient (1/62 = 1.6% had a benign lung mass (hamartoma, while the remaining 61 patients (61/62 = 98.4% had a malignant mass (primary lung cancer: 55/61 = 90%; lung metastasis: 6/61 = 10%. The sensitivity, specificity, and accuracy of EUS-FNA were 96.7%, 100%, and 96.7%, respectively. The sensitivity was 80.8% when considering nonvisualized masses. One patient developed a pneumothorax (1/62 = 1.6%. Conclusions. EUS-FNA appears to be an accurate and safe technique for tissue diagnosis of central mediastinal lung masses.

LIPOMA CEREBRAL EN CUERPO CALLOSO: HALLAZGO INCIDENTAL EN PACIENTE CON EVENTO CEREBROVASCULAR

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Gloria Cárcamo-Portillo

2016-07-01

Full Text Available Los lipomas intracraneales son lesiones infrecuentes y benignas que representan el 0,03 al 0,08% de todas las masas intracraneales. Estos se encuentran relacionados a un defecto de la línea media debido a un mal cierre del tubo neural; lo que conlleva a una mala diferenciación y una persistencia anormal de la meninge primitiva con posterior diferenciación al tejido adiposo. La mitad de los casos permanecen asintomáticos y son diagnosticados como un hallazgo incidental en los estudios imagenológicos. Sin embargo, otros casos se asocian a sintomatología neurológica como retraso psicomotor, cefalea, epilepsia y parálisis cerebral. Se presenta el caso de una paciente de 46 años de edad, con antecedentes de hipertensión arterial y diabetes mellitus tipo 2; que cursa con sintomatología de Evento Cerebrovascular Isquémico por lo que le realizan –una Tomografía Computarizada (TC y una Resonancia Magnética (RM. En el reporte se describen múltiples infartos a nivel del hemisferio cerebral izquierdo mientras que al nivel de la línea media se observó una imagen compatible con lipoma cerebral que afectaba el rostro, la rodilla y la porción anterior del cuerpo calloso. La identificación de este hallazgo fue incidental. Palabras claves: Lipoma Cerebral; Cuerpo Calloso; Resonancia Magnética; Accidente Cerebrovascular. (Fuente: DeCS BIREME.

Masa abdominal: pielonefritis xantogranulomatosa, un caso inusual en pediatría

OpenAIRE

BRAVO MUÑOZ, ANA MILENA; RESTREPO RESTREPO, JAIME MANUEL; CEBALLOS POSADA, MYRIAM LILI

2012-01-01

RESUMENla pielonefritis xantogranulomatosa es una forma grave y atípica de infección crónica del parénquima renal, frecuentemente subdiagnosticada, de presentación rara en la edad pediátrica. Los factores que comúnmente están asociados en el desarrollo de la enfermedad son la obstrucción y las infecciones del tracto urinario. La presentación clínica es inespecífica y variable, ocasionalmente puede semejar una masa de características tumorales. de otro lado requiere descartar abscesos y tuberc...

Aggressive solitary intracranial metastatic malignant melanoma from a primary mediastinal tumour.

Science.gov (United States)

Sivaraju, Laxminadh; Aryan, Saritha; Hegde, Vinay S; Ghosal, Nandita; Hegde, Alangar S

2016-08-01

Malignant melanoma is the third most common tumour to cause cerebral metastases, following breast and lung cancer. Central nervous system metastases occur in 10-40% of patients with melanoma. Intracranial metastasis from a primary malignant melanoma of the anterior mediastinum is uncommon. We report a case of solitary intracranial metastatic melanoma arising from a primary mediastinal tumour. We then discuss the clinico-radiological features and treatment options. © The Author(s) 2016.

Branchial cysts: an unusual cause of a mediastinal mass: a case report.

Science.gov (United States)

Kotecha, Vihar; Muturi, Alex; Ruturi, Josiah

2015-09-29

Complex embryological processes form the head and neck of humans. It is not flawless; remnants lead to sinuses or cysts, commonly in the head and neck region. We present the a case of an 8-year-old boy, a primary school pupil, from rural Kenya with chronic cough, wheezing, difficulty in breathing and dyspnea on exertion. He was treated with antibiotics and antitubercular drugs without improvement prior to referral to our hospital. A computed tomography scan of his chest revealed a superior mediastinal mass extending into his neck. A diagnosis of a brachial cleft cyst was made and our patient underwent a successful excision of the mass through a median strenotomy and neck dissection. Branchial cysts of the neck are common, accounting for 20% of pediatric neck masses. Usually they present as a neck mass but in our case it presented as a mediastinal mass, which is a very rare clinical presentation. Surgical excision is the mainstay of treatment. To the surgeon, the embryology and anatomy should be absolutely clear as dissection may be challenging due to the close proximity and variable course of the cystic stalk to major neck vessels and nerves.

Heart of Lymphoma: Primary Mediastinal Large B-Cell Lymphoma with Endomyocardial Involvement

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Elisa Rogowitz

2013-01-01

Full Text Available Primary mediastinal B-cell lymphoma (PMBCL is an uncommon aggressive subset of diffuse large B-cell lymphomas. Although PMBCL frequently spreads locally from the thymus into the pleura or pericardium, it rarely invades directly through the heart. Herein, we report a case of a young Mexican female diagnosed with PMBCL with clear infiltration of lymphoma through the cardiac wall and into the right atrium and tricuspid valve leading to tricuspid regurgitation. This was demonstrated by cardiac MRI and transthoracic echocardiogram. In addition, cardiac MRI and CT scan of the chest revealed the large mediastinal mass completely surrounding and eroding into the superior vena cava (SVC wall causing a collar of stokes. The cardiac and SVC infiltration created a significant therapeutic challenge as lymphomas are very responsive to chemotherapy, and treatment could potentially lead to vascular wall rupture and hemorrhage. Despite the lack of conclusive data on chemotherapy-induced hemodynamic compromise in such scenarios, her progressive severe SVC syndrome and respiratory distress necessitated urgent intervention. In addition to the unique presentation of this rare lymphoma, our case report highlights the safety of R-CHOP treatment.

Management of mediastinal syndromes in pediatrics: a new challenge of ultrasound guidance to avoid high-risk general anesthesia.

Science.gov (United States)

Sola, Chrystelle; Choquet, Olivier; Prodhomme, Olivier; Capdevila, Xavier; Dadure, Christophe

2014-05-01

Adverse events associated with anesthetic management of anterior mediastinal masses in pediatrics are common. To avoid an extremely hazardous general anesthesia, the use of real-time ultrasonography offers an effective alternative in high-risk cases. We report the anesthetic management including a light sedation and ultrasound guidance for regional anesthesia, surgical node biopsy, and placement of a central venous line in two children with an anterior symptomatic mediastinal mass. For pediatric patients with clinical and/or radiologic signs of airway compression, ultrasound guidance provides safety technical assistance to avoid general anesthesia and should be performed for the initial diagnostic and therapeutic procedures. © 2013 John Wiley & Sons Ltd.

Use of a sternal elevator to reverse complete airway obstruction secondary to anterior mediastinal mass in an anesthetized child

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Maria E. Linnaus

2016-05-01

Full Text Available Patients with an anterior mediastinal mass pose significant risk for cardiorespiratory compromise during surgical procedures and general anesthesia. Several techniques have been described to reverse airway obstruction in these patients. In extreme circumstances, patients may require cardiac bypass or extracorporeal membrane oxygenation (ECMO until definitive treatment of the mass and patient stabilization is achieved. We present a case in which the RulTract® system was used for emergency sternal elevation as a bridge to ECMO in acute respiratory collapse in an 11-year-old female with a minimally symptomatic anterior mediastinal mass.

Tracheal dimness as a sign of mediastinal pathology

International Nuclear Information System (INIS)

Schiavon, F.; Nardini, S.; Giannico, S.

1987-01-01

Some cases of mediastinal pathology in which the only pathological pattern was a dimness of the tracheal transparency are described. This sign is not described in previous report and is described as a short break in the aerial tracheogram as seen on the frontal roentgenograph. This sign is produced by an increase in the structures outside the trachea or by a decrease in the air column inside the trachea. Conventional and CT anatomic findings which account for the sign are discussed. A short review of the normal causes of tracheal dimness is presented. This sign may be useful expecially in emergency radiology, since it provides additional information to a simple routine chest roentgenograph

Adenoma paratiroideo ectópico mediastinal: Diagnóstico por sonda de detección gamma y resección por videotoracoscopia Ectopic mediastinal parathyroid adenoma: Detection with a radioisotopic probe and resolution with videothoracoscopy

Directory of Open Access Journals (Sweden)

Daniel Moncet

2006-10-01

Full Text Available Presentamos el caso de una mujer de 66 años con diagnóstico de hiperparatiroidismo primario por adenoma paratiroideo ectópico mediastinal realizado por gammagrafía paratiroidea con 99mtc-metoxi-isobutil-isonitrito (Tc99-MIBI. Fue intervenida exitosamente mediante la técnica de videotoracoscopia. Durante el procedimiento se utilizó la medición de parathormona y a los 10 minutos de extirpado el adenoma se obtuvo un descenso mayor del 50% del basal. La sonda de detección gamma no fue efectiva in situ por la superposición del radioisótopo con el miocardio pero confirmó la radioactividad dentro del quirófano una vez extirpado el adenoma. La paciente normalizó los valores de calcemia y parathormona en el postoperatorio y permaneció normocalcémica luego de 9 meses de seguimiento. En nuestro caso, la localización prequirúrgica y el monitoreo de parathormona intraoperatoria fueron de gran utilidad para el éxito quirúrgico, la sonda detectora marcada con Tc99-MIBI no fue efectiva in situ pero confirmó la radioactividad una vez extirpado el adenoma. El tratamiento quirúrgico endoscópico por videotoracoscopia fue bien tolerado, menos doloroso que la toracotomía y acortó el tiempo de internación.We report a 66 years old woman with a diagnosis of primary hyperparathyroidism. Localization to mediastinum was obtained with parathyroid scintigraphy using 99mtc-methoxy-isobutyl-isonitrite (Tc99-MIBI. The patient was successfully operated upon by means of a videothora-coscopic approach. During the procedure serum parathormone was measured before and 10 minutes after adenomectomy, showing a more than 50% reduction from the basal level. An attempt to detect the precise site of the adenoma with a Tc99-MIBI probe was unsuccessful because of its proximity to the myocardium, but radioactivity was confirmed on the surgical specimen after resection. The patient's calcemia and parathormone levels became normal during the postoperative course and she

TUMOR VENÉREO TRANSMISIBLE CANINO DE PRESENTACIÓN ATÍPICA. REPORTE DE CASO CLÍNICO

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R. Crossley

2017-01-01

Full Text Available Se describe el caso de un paciente canino macho entero, raza Bóxer, de ocho años de edad y 30 kg de peso vivo, que ingresó a consulta en el hospital Clínico Veterinario de la Universidad Santo Tomás, sede Santiago, por un aumento de volumen en el ojo derecho, signo clínico con un curso de dos meses de evolución que no respondió al tratamiento con prednisona oral (0,7 mg/kg, dos veces al día (BID, ni a dexametasona y tobramicina en ungüento oftálmico (1 gota, tres veces al día, TID. Al examen físico se observó una masa en el tercer párpado que desplazaba el ojo lateralmente, además de una masa que se palpaba en la base lateral del pene. Se realizó una ecografía ocular que indicó la presencia de una masa de aspecto irregular con parénquima heterogéneo y características neoplásicas en la zona medial del globo ocular derecho y una ecografía abdominal que permitió detectar una masa dorsal a la vejiga. Al realizar citología ecoguiada de las masas intraabdominal y ocular, bajo sedación, se constató una inflamación supurativa, necrosis y displasia epitelial en la masa periorbitaria sugerente de neoplasia, la cual no se pudo diagnosticar fehaciente - mente; por su parte, la citología de la masa intraabdominal indicó la presencia de Tumor Venéreo Transmisible (TVT. El tratamiento se inició con vincristina (ocho aplicaciones i.v. de 0,7 mg/m² cada 7 días lográndose remisión parcial. Ante una posible resistencia al efecto de la quimioterapia, se decidió modificar la terapia a doxorrubicina (30 mg/m² la cual tuvo respuesta positiva alcanzando remisión completa con una aplicación única.

Effective treatment for malignant mediastinal teratoma.

Science.gov (United States)

Parker, D; Holford, C P; Begent, R H; Newlands, E S; Rustin, G J; Makey, A R; Bagshawe, K D

1983-12-01

Primary malignant mediastinal teratoma is a rare tumour previously regarded as inevitably fatal. In a series of eight male patients with a mean age of 24 years five remain alive and well. All patients showed raised serum concentrations of human chorionic gonadotrophin or alpha fetoprotein. The patients were treated with intermittent combination chemotherapy that included cisplatin. Six patients responded to chemotherapy with a fall in human chorionic gonadotrophin or alpha fetoprotein to near normal levels and they then had radical excision of the remaining tumour. Living malignant tumour was found in four of the specimens and these patients received postoperative chemotherapy. One patient died after eight months and the remaining five patients are alive and well 13-136 months after the start of treatment. The two patients who did not undergo surgery died at one month and 15 months. Intermittent combination chemotherapy and carefully timed radical excision of these tumours would appear to have produced better results than have been reported in other series.

Estudio analítico de MTA-Angelus® y Biodentine® con técnicas SPME-GCMS y AFM

OpenAIRE

Díaz-Flores García, Víctor; Martínez Pérez, Lucía; Escribano Otero, Amparo; Kayali Sayadi, Nour

2016-01-01

Introducción: El objetivo del estudio fue obtener información analítica sobre la pureza química y homogeneidad de los materiales de uso endodóntico MTA-Angelus® y Biodentine®. Material y métodos: Se analizaron ambos materiales mediante la técnica de microextracción en fase sólida (SPME), combinada con cromatografía de gases acoplada a espectrómetro de masas (GC-MS) para separar e identificar los compuestos orgánicos volátiles (COVs) contenidos. Por otro lado, utilizando microscopía de f...

Precisión de las velocidades radiales obtenidas con el REOSC

Science.gov (United States)

González, J. F.; Lapasset, E.

Complementando una línea de trabajo iniciada con anterioridad discutimos la estabilidad del espectrógrafo REOSC de CASLEO en DC para la medición de velocidades radiales en base al análisis de observaciones realizadas en enero y abril de 1997. En esas oportunidades obtuvimos 26 espectros de estrellas patrones y 27 espectros de 3 estrellas usadas como estrellas de referencia en nuestro programa de cúmulos abiertos. Además tomamos 26 espectros de crepúsculo con el telescopio en posiciones cubriendo el rango H=-4,+4 y δ =-90,+30. Mediante correlaciones cruzadas derivamos la velocidad de 19 órdenes en cada uno de estos espectros. En base a un análisis estadístico de los datos obtenidos discutimos la contribución de los distintos factores que afectan a la dispersión de lectura observada. En particular, la flexión del instrumento no introduciría errores significativos cuando se observa con masas de aire menores que 2.0. La dispersión de los valores de velocidad medidos para espectros de alta relación S/N de una misma estrella resultó del orden de 0.5 km/s. La comparación con los valores de velocidad publicados por distintos autores para las estrellas patrones no permite distinguir ninguna diferencia sistemática apreciable de las velocidades de CASLEO, siendo la media cuadrática de los residuos del orden de 1.0 km/s.

The adipose tissue of origin influences the biological potential of human adipose stromal cells isolated from mediastinal and subcutaneous fat depots

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Camilla Siciliano

2016-09-01

Full Text Available Indirect evidence suggests that adipose tissue-derived stromal cells (ASCs possess different physiological and biological variations related to the anatomical localization of the adipose depots. Accordingly, to investigate the influence of the tissue origin on the intrinsic properties of ASCs and to assess their response to specific stimuli, we compared the biological, functional and ultrastructural properties of two ASC pools derived from mediastinal and subcutaneous depots (thoracic compartment by means of supplements such as platelet lysate (PL and FBS. Subcutaneous ASCs exhibited higher proliferative and clonogenic abilities than mediastinal counterpart, as well as increased secreted levels of IL-6 combined with lower amount of VEGF-C. In contrast, mediastinal ASCs displayed enhanced pro-angiogenic and adipogenic differentiation properties, increased cell diameter and early autophagic processes, highlighted by electron microscopy. Our results further support the hypothesis that the origin of adipose tissue significantly defines the biological properties of ASCs, and that a homogeneric function for all ASCs cannot be assumed.

Benign Mature Mediastinal Dysembryoma with Pulmonary Extension Revealed by Recurrent Hemoptysis in a Young Woman

International Nuclear Information System (INIS)

Filaire, M.; Michel-Letonturier, M.; Garcier, J. M.; Escande, G.; Boyer, L.

2006-01-01

We report one case of mature mediastinal teratoma with pulmonary extension surgically diagnosed in a 22-year-old woman complaining of recurrent hemoptyses for which no etiological explanation could be found. Thoracic surgery was only decided on after three embolizations proved ineffective

Factores de riesgo relacionados con la prevalencia de sobrepeso y obesidad en adolescentes

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Yasmin Gabriela Otero-Esteban

2015-12-01

Full Text Available Objetivo: identificar los factores de riesgo relacionados con la prevalencia de sobrepeso y obesidad en adolescentes entre 10 y 18 años que pertenecen a los colegios públicos de la ciudad de Cúcuta, durante el primer semestre del 2014. Materiales y Métodos: estudio descriptivo de corte transversal; con una población: 61.172 adolescentes y una muestra de 382 estudiantes matriculados en los colegios públicos de Cúcuta. El instrumento fue diseñado por las investigadoras para valorar las características sociodemográficas, medidas antropométricas, factores endógenos, exógenos y percepción del exceso de peso y de su imagen. Resultados: el exceso de peso presento alta proporción en la adolescencia temprana y en el estrato socioeconómico 2. Predominio de sobrepeso en mujeres y obesidad en hombres. En los factores endógenos asociados con estos trastornos, prevaleció el antecedente familiar de sobrepeso y obesidad, además recibieron otra alimentación y no leche materna durante los primeros seis meses, y como antecedentes personales presentaron ansiedad y parto prematuro. En los factores exógenos la alimentación de los adolescentes con sobrepeso es alta en grasas y en los obesos es alta en azúcares, baja en verduras y fibra. Los estudiantes con déficit y con peso normal, se sienten flacos y sanos; los adolescentes con sobrepeso perciben su silueta mayor, y los obesos la perciben menor a la establecida para su índice de masa corporal. Conclusiones: los adolescentes escolarizados presentan una alta prevalencia de sobrepeso y obesidad, observándose una mayor preponderancia de factores de riesgo endógenos y exógenos. De igual manera, presentan una imagen corporal que no corresponde a su estado nutricional.

Evaluación del servicio de internet con acceso móvil en el ecuador

OpenAIRE

Morales Arévalo, Flavio David

2013-01-01

El acceso a Internet a través de dispositivos móviles permite la unión de dos grandes. Por un lado, la telefonía móvil celular con su gran capacidad de alcanzar a las masas y por otro, el acceso a un mundo de información y contenidos propios de Internet. En Ecuador, la telefonía móvil cuya penetración ya superó el 100%, pasará de ser un mercado solo de voz y mensajes de texto hacia una evolución de navegación en Internet y redes sociales. En este contexto, es importante determinar el aporte s...

Bromadiolona: un caso judicial relacionado con la muerte de abejas Bromadiolone: a judicial case related to bees death

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Guillermo Pablo Salinas

2011-12-01

Full Text Available Como resultado de una investigación impulsada por la justicia, se analizaron muestras provenientes de un posible derrame intencional de plaguicidas sobre colmenas con abejas. En los análisis realizados se utilizó GC-MS previa extracción con solventes orgánicos. Debido a dificultades iniciales en la identificación de plaguicidas sobre tres de las muestras, se procedió al reprocesamiento de los cromatogramas utilizando selección de las relaciones de masas m/z 158, 173 y 143. Utilizando es herramienta analítica se obtuvieron los correspondientes cromatogramas, y los espectros de masas con coincidencia frente al divulgado para el producto de descomposición de bromadiolona (PDB, determinando que tanto las abejas como las colmenas habían tenido contacto con bromadiolona (3-[3-(4'-bromobifenil-4-il- 3-hidroxi-1-fenilpropil]-4- hidroxicumarina, un anticoagulante cumarínico de utilización agraria para combatir roedores, que parece ser prácticamente no tóxico para las abejas según informes internacionales. Se observó que en la literatura no se halla propuesta una estructura química definida para el PDB, lo cual podría constituir el fundamento para encarar trabajos futuros con el fin de elucidar el comportamiento de la droga madre en el contexto del caso.As a result of an investigation boosted by ordinary justice, samples from a probable deliberate spill of pesticide over bees and hives were analyzed. Solvent extractions and then GC-MS were used to perform the tests. Due to difficulties since the beginning in pesticide identification upon three samples, chromatograms were reprocessed using mass selection at m/z 158, 173 y 143 mass rates. The correspondent chromatograms were gathered by these analytical tool, and their mass spectrums were found coincident with the previously reported as bromadiolone decomposition product (BDP, showing that hives as well as bees had been in contact with bromadiolone (3-[3-(4'-bromobiphenyl-4-yl- 3-hydroxy

Origin and pharmacological response of atrial tachyarrhythmias induced by activation of mediastinal nerves in canines.

Science.gov (United States)

Armour, J Andrew; Richer, Louis-Philippe; Pagé, Pierre; Vinet, Alain; Kus, Teresa; Vermeulen, Michel; Nadeau, Réginald; Cardinal, René

2005-03-31

We sought to determine the sites of origin of atrial tachyarrhythmias induced by activating mediastinal nerves, as well as the response of such arrhythmias to autonomic modulation. Under general anaesthesia, atrioventricular block was induced after thoracotomy in 19 canines. Brief trains of 5 electrical stimuli were delivered to right-sided mediastinal nerves during the atrial refractory period. Unipolar electrograms were recorded from 191 right and left atrial epicardial sites under several conditions, i.e. (i) with intact nervous systems and following (ii) acute decentralization of the intrathoracic nervous system or administration of (iii) atropine, (iv) timolol, (v) hexamethonium. Concomitant right atrial endocardial mapping was performed in 7 of these dogs. Mediastinal nerve stimulation consistently initiated bradycardia followed by atrial tachyarrhythmias. In the initial tachyarrhythmia beats, early epicardial breakthroughs were identified in the right atrial free wall (28/50 episodes) or Bachmann bundle region (22/50), which corresponded to endocardial sites of origin associated with the right atrial subsidiary pacemaker complex, i.e. the crista terminalis and dorsal locations including the right atrial aspect of the interatrial septum. Neuronally induced responses were eliminated by atropine, modified by timolol and unaffected by acute neuronal decentralization. After hexamethonium, responses to extra-pericardial but not intra-pericardial nerve stimulation were eliminated. It is concluded that concomitant activation of cholinergic and adrenergic efferent intrinsic cardiac neurons induced by right-sided efferent neuronal stimulation initiates atrial tachyarrhythmias that originate from foci anatomically related to the right atrial pacemaker complex and tissues underlying major atrial ganglionated plexuses.

Orígenes y desarrollo turístico en Alicante: del veraneo al turismo de masas

OpenAIRE

Mazón Martínez, Tomás

2016-01-01

Estudio de lo orígenes de la actividad turística en Alicante, a partir del último tercio del siglo XIX hasta la llegada del turismo de masas y el desarrollo y evolución de Benidorm de la mano de su inventor, el alcalde Pedro Zaragoza Orts.

Relaci??n entre la masa muscular, la densidad mineral ??sea, la fuerza muscular, la aptitud funcional y la calidad muscular en personas mayores

OpenAIRE

Pati??o Villada, Fredy Alonso

2015-01-01

294 p. La tesis pretende determinar la frecuencia de la sarcopenia y osteporosis , problemas que afectan a la salud de las personas mayores, y analizar la relaci??n entre la masa muscular, la densidad mineral ??sea (DMO), la fuerza muscular, la aptitud funcional y la calidad muscular (CM). La muestra estudiada fue la formada por un grupo de 83 hombres y 175 mujeres mayores de Le??n (Espa??a). El estudio transversal eval??a ??ndices de masa grasa y densidad mineral ??sea y niveles d...

Metastatic mediastinal mature teratoma with malignant transformation in a young man with an adenocarcinoma in a Klinefelter's syndrome: Case report and review of the literature.

Science.gov (United States)

Le Fèvre, C; Vigneron, C; Schuster, H; Walter, A; Marcellin, L; Massard, G; Lutz, P; Noël, G

2018-05-01

Malignant transformation of mediastinal mature teratoma is extremely rare and worsens the prognosis of the disease. Transformation can appear synchronously to or several years after the initial diagnosis. Clinical and radiological signs can orientate the clinician but the definitive diagnosis is obtained thanks to histology. An 11 year-old boy presented with a mediastinal mature teratoma and bone and pulmonary metastases. He received six cycles of chemotherapy combining etoposide, ifosfamide, cisplatin, followed by resection of a 16×14×9cm mediastinal mass. Karyotype analysis revealed the presence of an additional sex chromosome X (47 XXY) pathognomonic of Klinefelter's syndrome. Ten years later, sciatalgia revealed malignant transformation of a pre-existing sacral bone metastasis into gastrointestinal adenocarcinoma. The patient received four cycles of chemotherapy combining oxaliplatin, 5-fluorouracil and cetuximab. This treatment was followed by a complete resection of the sacral metastasis and completed with adjuvant irradiation of 54Gy in 30 daily fractions. Twelve months after the diagnosis of relapse, the patient remained alive without disease. To our knowledge, this is the first case of adenocarcinoma developed in bone metastases of a mediastinal mature teratoma in a boy with a Klinefelter's syndrome. We propose a review of the literature and an analysis of 20 others published cases of mediastinal teratoma with malignant transformation into adenocarcinoma. Copyright © 2018 Société française de radiothérapie oncologique (SFRO). Published by Elsevier Masson SAS. All rights reserved.

Obesidad infantil y su relación con indicadores cardiopulmonares en escolares mexicanos

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José Arias-Rico

2016-01-01

Full Text Available Objetivo: determinar la relación entre obesidad y anormalidades de parámetros cardiopulmonares en escolares. Materiales y mé- todos: participaron 78 escolares entre 5 a 11 años de edad, 47 hombres (60,3 % y 31 mujeres (39,7 % , pertenecientes a una escuela primaria particular de la ciudad de Pachuca (México. Se evaluó: índice de masa corporal (IMC, circunferencia de cintura (CC, grasa corporal (GC, frecuencia cardiaca (FC, presión arterial (PA, frecuencia respiratoria (FR y espirometría. Se emplearon las pruebas estadísticas chi-cuadrado (x2, odds ratio y correlación de Spearman (rs. Resultados: 23,1 % de los escolares evaluados presentaron sobrepeso y 29,5 %, obesidad. El 38,5 y 11,5 % presentaron FC y PA superiores a los parámetros normales, respectivamente; 3,8 % de la población presentó FR arriba del promedio y 11,5 % mostró valores espirométricos anormales. Se encontraron relaciones entre IMC con GC y CC, GC y CC, CC y FC, GC y PA, y FC y FR. Conclusiones: las prevalencias de sobrepeso y obesidad obtenidas en este estudio fueron altas. Los niños con sobrepeso u obesidad podrían tener mayor riesgo de presentar anormalidades cardiopulmonares en comparación con niños de peso normal. Se sugiere continuar con estudios en el tema en una muestra más amplia.

Evolución estelar en sistemas binarios

Science.gov (United States)

De Vito, M. A.; Benvenuto, O.

Definición y clasificación de sistemas binarios; descripción del comportamiento del sistema frente a la variación de su masa; binarias de rayos X; transferencia de masa en sistemas binarios masivos aplicado al posible esclarecimiento del progenitor azul de la supernova SN 1987A; comentario acerca de la evolución de enanas blancas de helio de baja masa y su conexión con los sistemas binarios; reseña del trabajo de Kippenhahn y Weigert sobre el cual está basado el código evolutivo desarrollado en la FCAG por el Dr. Benvenuto y sobre el cual se trabajará para poder incluir la evolución de una estrella con pérdida de masa perteneciente a un sistema binario.

[Mediastinal teratoma with malignant transformation of the somatic component. Clinical report].

Science.gov (United States)

Gerardo, Rita; Morgado, Carolina; Calvo, Dolores; Pinto, Eugénia; Bravio, Ivan; Castelão, Nelson; Martelo, Fernando

2009-01-01

Mediastinal germ cell tumours (M-GCT) are rare forms of neoplasms compared with other tumours of the same location. They are classified in seminomas, malignant non-seminomatous GCT and teratomas. The malignant transformation of the somatic component of the teratoma, with sarcomatous or carcinomatous degeneration, is even more uncommon. We report the clinical case of a 32 year old man who presented with severe chest pain on the right hemithorax. The image exams revealed the existence of a large heterogeneous lesion with a diameter of 7.7 cm, with areas of lipomatous density and a calcic image with the appearance of a tooth, in the right projection of the anterior mediastinum, in the vicinity of the large vessels, compatible with teratoma. The transthoracic biopsy (CT guided) showed morphologic aspects of sarcoma. The patient was operated on with the en bloc resection of the mediastinal mass, right lung, a segment of the pericardium and the thymus. The pathological studies showed a teratoma with malignant transformation of the mesenquimatous component, with muscular differentiation into leiomiosarcoma and rabdomiosarcoma. After surgery, the patient was treated with a scheme of doxorubicin and ifosfamide. The most prominent concepts related to this clinical entity, as well as its treatment, are debated in this article, based on the most recent publications dedicated to the subject.

New domains of neural cell-adhesion molecule L1 implicated in X-linked hydrocephalus and MASA syndrome

Energy Technology Data Exchange (ETDEWEB)

Jouet, M.; Kenwick, S. [Univ. of Cambridge (United Kingdom); Moncla, A. [Hopital d`Enfants de la Timone, Marseillas (United Kingdom)] [and others

1995-06-01

The neural cell-adhesion molecule L1 is involved in intercellular recognition and neuronal migration in the CNS. Recently, we have shown that mutations in the gene encoding L1 are responsible for three related disorders; X-linked hydrocephalus, MASA (mental retardation, aphasia, shuffling gait, and adducted thumbs) syndrome, and spastic paraplegia type I (SPG1). These three disorders represent a clinical spectrum that varies not only between families but sometimes also within families. To date, 14 independent L1 mutations have been reported and shown to be disease causing. Here we report nine novel L1 mutations in X-linked hydrocephalus and MASA-syndrome families, including the first examples of mutations affecting the fibronectin type III domains of the molecule. They are discussed in relation both to phenotypes and to the insights that they provide into L1 function. 39 refs., 5 figs., 3 tabs.

Evaluación de la transferencia de oxígeno en cultivos con lactococcus lactis empleando un sistema de fermentación con aireación externa

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Andrea Soler

2010-07-01

Full Text Available Título en inglés: Evaluating oxygen transfer in a Lactococcus lactis cultures using an external aeration fermentation system (EAFS Resumen En fermentaciones aerobias el oxígeno, como aceptor terminal de electrones en el proceso de respiración, comúnmente se constituye en limitante debido entre otros factores al diseño del biorreactor (factores geométricos, a las condiciones de operación de los fermentadores (condiciones ambientales requeridas en el cultivo, potencia transferida al cultivo por el sistema de agitación, propiedades del medio líquido, demanda de oxígeno por parte del microorganismo, sistema de aireación (concentración de oxígeno en el gas, solubilidad del oxígeno. La limitación de oxígeno se refleja en la fermentación con Lactococcus lactis cepa IBUN 34.1, en que presenta una baja disponibilidad de oxígeno desde muy temprano en la fase exponencial del cultivo. Para superar estas limitaciones se diseñó y desarrolló un sistema de suministro de oxígeno de alta tasa de transferencia, consistente en un sistema de fermentación con aireación externa (SFAE, el cual es comparado en este trabajo con el sistema tradicional de fermentador agitado dotado con dos turbinas tipo Rushton y aireación por difusor interno. En este trabajo se evalúa la operación del SFAE, se seleccionan y estudian algunas variables operacionales y su efecto sobre la transferencia de oxígeno gas-líquido. Los resultados indican que las variables que tienen efecto significativo sobre el coeficiente volumétrico global de transferencia de masa kLa son la agitación y el flujo de medio de cultivo que circula por el aireador externo denominado flujo de recirculación. Los valores de kLa obtenidos indican que con el fermentador convencional con aireación interna el mayor valor de kLa alcanzado fue de 40,68 (h-1, en tanto que con el SFAE se alcanzaron valores de 63,18 (h-1. Palabras clave: biorreactores; kLa; transferencia de ox

MSCT multi-criteria: A novel approach in assessment of mediastinal lymph node metastases in non-small cell lung cancer

International Nuclear Information System (INIS)

Volterrani, Luca; Mazzei, Maria Antonietta; Banchi, Benedetta; Voltolini, Luca; La Sala, Filomena; Carbone, Salvatore Francesco; Ricci, Veronica; Gotti, Giuseppe; Zompatori, Maurizio

2011-01-01

Summary: Purpose: To evaluate the accuracy of multi-slice computed tomography (MSCT) in diagnosing mediastinal lymph node metastases in patients with non-small cell lung cancer (NSCLC) using a multi-criteria approach. Methods: We retrospectively reviewed contrast-enhanced MSCT of the chest in 86 consecutive patients with histopathologically proven NSCLC. All patients underwent surgical lymph node resection within 30 days from the CT examination. In all cases pathological and CT results were reviewed and correlated. Results: The sensitivity, specificity, positive and negative predictive values, and accuracy of MSCT using a multi-criteria approach in the detection of the N2 stage were 100%, 98.5%, 100%, 94.4% and 98.8% respectively, whereas using the size criterion alone 64%, 61%, 87%, 40%, and 62% respectively. Conclusions: To improve MSCT accuracy for diagnosing N staging other criteria can be associated with lymph node size. The use of different dimensional cut-offs for each mediastinal lymph node station, the matching of positive nodal stations with tumour location, the structural characteristics and the type of enhancement allow for a high accuracy of MSCT in the staging of mediastinal nodes in NSCLC.

Diversidad de sistemas planetarios sin gigantes gaseosos en discos de baja masa

OpenAIRE

Ronco, María Paula

2013-01-01

Como indica el título de esta tesis, el objetivo general de nuestro trabajo es poder analizar la diversidad de sistemas planetarios que podrían formarse alrededor de estrellas de tipo solar y sin gigantes gaseosos. Nuestro interés particular es estudiar estos sistemas en discos de baja masa, pues podemos asegurar que en ellos no hay posibilidad de formar planetas gigantes gaseosos. Para poder lograr este análisis desarrollamos simulaciones de N-cuerpos orientadas a estudiar el proceso de form...

Fulminant mediastinitis after goiter recurrence surgery: a case report

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Mittag-Bonsch Martina

2010-11-01

Full Text Available Abstract Introduction Necrotizing soft tissue infection is a life-threatening disease characterized by rapid progressive inflammation and necrosis of the subcutaneous and deep fascia with or without involvement of the adjacent muscles. Case presentation We report the case of a 62-year-old Caucasian woman with goiter recurrence who underwent a right-sided hemithyroidectomy. Postoperatively, she developed fulminant mediastinitis caused by group A β-hemolytic streptococcus and septic shock. Our patient survived this rare life-threatening complication. Conclusions Initial atypical postoperative symptoms, such as personality changes or an unstable circulatory system, should lead a practitioner to consider the possibility of this severe complication and to begin therapy immediately.

Desarrollo de galletas con sustitución parcial de harina de trigo con harina de algarroba (Prosopis alba y avena para planes sociales

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Sara Macías

2013-12-01

Full Text Available La diversificación de alimentos es una estrategia para abordar problemas nutricionales. Producir alimentos de consumo masivo incorporando harinas regionales sería una opción para obtener alimentos de valor nutritivo optimizado. El objetivo de este trabajo fue desarrollar galletas de calidad nutricional mejorada, para escolares, con mezclas de harinas de trigo, de algarroba y avena. Se determinó la composición proximal y Ca, Fe, Mg, P, K y Zn en harina de algarroba con metodología AOAC y disponibilidad potencial in vitro para Ca, Fe y Zn. Se evaluó la calidad proteica teórica de distintas mezclas por el método del Puntaje Químico, previa corrección por digestibilidad, utilizando como proteína de referencia los requerimientos del patrón FAO. Se diseñaron galletas con 3 mezclas porcentuales: harina de trigo:harina de algarroba 70:30 y 80:20, harina de trigo:harina de algarroba:avena 80:10:10 y un testigo con 100 % harina de trigo. Se determinaron composición proximal, contenido y disponibilidad potencial de Ca, Fe y Zn. Se midieron parámetros tecnológicos en masas y galletas (color y factor de expansión. Las galletas se evaluaron sensorialmente con 35 consumidores, usando escala hedónica de 9 puntos. El Puntaje Químico aumentó ≈ el 25 % en la mezcla 70:30, 19 % en la 80:20 y 28 % para la 80:10:10 respecto del aminoácido lisina en harina de trigo. La corrección por digestibilidad, posicionó con mejor calidad proteica a la mezcla 80:10:10. El diámetro de las galletas aumentó con la disminución del espesor. El balance entre criterios nutricionales y tecnológicos favoreció la elección de las galletas 80:20 y 80:10:10. Son fuente de fibra y minerales. En pruebas sensoriales, las galletas obtuvieron puntaje superior a 6, siendo la más aceptada la 80:10:10. Es tecnológicamente posible sustituir un 20 % de harina de trigo por los ingredientes propuestos obteniéndose galletas nutricionalmente mejoradas y aceptables para

Analisis Semiotika Makna Pesan pada Iklan Axis Versi “Iritologi – Menatap Masa Depan”

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Puri Sulistiyawati

2016-02-01

Full Text Available Abstrak Tujuan dari penelitian ini adalah untuk mengetahui dan menganalisis makna pesan dalam iklan Axis versi “Iritologi – Menatap masa depan” di televisi dengan menggunakan pendekatan semiotika Roland Barthes. Dari analisis yang telah dilakukan berdasarkan makna denotasi, konotasi dan mitos dalam iklan Axis versi “iritologi – Menatap masa depan”, dapat diketahui bahwa iklan Axis memiliki konsep yang sangat sederhana, dengan mengusung tema tentang kebiasaan remaja dalam memanfaatkan media sosial. Dari visual iklan yang ditampilkan menguatkan pesan bahwa produk Axis ini menyasar remaja sebagai target audience, remaja atau pelajar adalah konsumen yang mendambakan produk dengan kalitas baik namun dengan harga yang terjangkau. Meski menyasar remaja, namun dalam target marketnya Axis tetap menyasar semua kalangan. Setting tempat atau latar pada iklan yang ditampilkan pun sebagai representasi bahwa Axis dapat dijangkau oleh semua kalangan ekonomi khususnya masyarakat menengah kebawah. Makna Mitos dalam iklan Axis ini tersirat pada scene tertentu. Secara umum iklan ini menyampaikan bahwa selfie dan media sosial sebagai bagian dari kehidupan masyaraka khususnya generasi muda, sebagai sarana untuk berinteraksi dan menunjukan eksistensinya kepada komunitas. Melalui foto yang diunggah pada media sosial, khalayak merepresentasikan perasaan maupun kegiatan yang sedang di lakukannya. Sehingga hal tersebut memicu kebutuhan akan jaringan komunikasi yang lancar dan ekonomis. Kata Kunci: iklan, axis, semiotika, mitos  Abstract The purpose of this research was to determine and analyze the meaning of message in Axis advertisement version “Iritologi – Menatap masa depan” on television using Roland Barthes semiotic approach. Analysis has been done based on the meaning of denotation, connotation and myth in Axis advertisement version “Iritologi – Menatap masa depan”, it can be seen that Axis advertisement has a simple concept, with a theme of

Pielonefritis xantogranulomatosa difusa con fístula renocólica inadvertida durante más de dos años

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Fariña Pérez, L.A.; Pesqueira Santiago, D.; Álvarez Álvarez, C.; Zungri Telo, E.R.

2004-01-01

INTRODUCCIÓN: Aunque la fístula renocólica es una complicación conocida de la forma difusa de la pielonefritis xantogranulomatosa, describimos un caso inusual, por la pobreza de los síntomas y la larga evolución de la enfermedad antes de ser diagnosticada. CASO CLÍNICO: Una mujer de 75 años fue vista en el Servicio de Urgencias con fiebre y malestar general. El examen y las pruebas de laboratorio mostraron una masa en el hemiabdomen izquierdo y anemia, y en la radiografía de abdomen y la tomo...

Correlación de fluctuaciones de niveles freáticos con variaciones del nivel del Río de la Plata

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Lissa, Simón

2010-01-01

La atracción gravitatoria de la Luna y el Sol produce el conocido efecto de mareas que suele observarse con mayor claridad en los océanos, mares y algunos ríos. Este efecto también ha sido observado en pozos de monitoreo de aguas subterráneas cercanos a las costas por numerosos autores (Carr y van der Kamp, 1969; Erskine, 1991; Ja et al, 2003). Estas variaciones ponen de manifiesto una conexión hidráulica entre el acuífero costero y la masa de agua que está siendo afectada por el efecto de ma...

Complicaciones del tratamiento con anticoagulantes orales en mayores de 65 años, a propósito de un caso

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María de las Nieves Perejón Díaz

2014-08-01

Full Text Available Descripción del caso: Mujer de 79 años con antecedentes de hipertensión arterial, fibrilación auricular (FA permanente anticoagulada (acenocumarol e insuficiencia mitral. Barthel 90, Lowton-Brody: 2. Acude a urgencias por dolor costal (osteomuscular de dos semanas de evolución, sin otros síntomas, siendo dada de alta y acudiendo nuevamente por epistaxis y disnea. Exploración y pruebas complementarias: destacar en la auscultación cardio-pulmonar: tonos arrítmicos con soplo sistólico en reborde esternal izquierdo, crepitantes hasta campos medios, con murmullo vesicular disminuido. Radiografía de tórax: masa hiliar derecha con engrosamiento pleural derecho, e infiltrado bilateral. Hemograma: hemoglobina 7.9 g/dl (previa 11.6 g/dl, leucocitos 11.57x10l. Bioquímica: PCR 72.90mg/l, urea 85 mg/l. Coagulación: INR indeterminado, actividad protrombina 4 aumenta el riesgo de sangrado. Se trata de un paciente pluripatológico, dependiente moderada, con mal cumplimiento tratamiento y de control de anticoagulación. Ante estos datos (anemización, ausencia de signos de infección o insuficiencia cardiaca, y los resultados de las pruebas, nos decantamos por la hemorragia alveolar como primera posibilidad diagnostica.

La citometría de flujo en el estudio de tumores mediastinales ricos en elementos linfoides Flow cytometry for the study of mediastinal tumors with abundant lymphoid elements

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Gerardo Vides Almonacid

2008-02-01

Full Text Available El mediastino anterior es un sitio frecuente de localización de tumores ricos en elementos linfoides. La identificación correcta de cada entidad es de importancia en el tratamiento de los pacientes. En ocasiones puede plantearse el diagnóstico diferencial entre timoma y linfoma linfoblástico con fenotipo de precursor T (LLB-T. La Citometría de Flujo (CF es una técnica complementaria útil para estos tumores de la cual se obtiene información cualitativa y cuantitativa. Revisamos 38 tumores mediastinales que tenían estudio de CF. Además comparamos los resultados de CF de timomas y tejido tímico normal con 42 casos de LLB-T de otras localizaciones anatómicas. De los 38 tumores mediastinales 6 eran lesiones benignas, 9 linfomas difusos de células grandes con fenotipo B (LDCG-B, 10 linfomas de Hodgkin (LH, 11 timomas y 2 LLB-T. En 24 casos la CF aportó información positiva, definiendo el inmunofenotipo de las células linfoides neoplásicas, o los linfocitos característicos que acompañan a los timomas. La CF en los 10 casos de LH y en 4 lesiones benignas permitió descartar otros tipos de linfoma (LDCG-B, LLB-T, etc.. Las marcaciones para CD3, CD4 y CD8 fueron las más útiles para el diagnóstico diferencial entre timomas y LLB-T. En conclusión, la CF es una técnica complementaria de utilidad que aporta información en lesiones mediastinales de manera rápida, requiriendo cantidades pequeñas de material, tanto para el diagnóstico inicial como para el monitoreo de estas enfermedades.The anterior mediastinum is a common site of tumors with abundant lymphoid elements. Flow cytometry is a useful complementary technique to analyze this type of tumors, which provides qualitative and quantitative information. A differential diagnosis can be sometimes made between thymoma and precursor T-lymphoblastic lymphoma (T-LBL. Correct identification is of utmost importance for patient treatment. A total of 38 mediastinal tumors were analyzed, and

Quiste dermoide intracraneal con rotura espontánea. Reporte de caso

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Leonardo Andrés Chacón-Zambrano

2017-04-01

Full Text Available Introducción: Los quistes dermoides son tumores raros, que se originan por la inclusión de elementos de origen ectodérmico en el momento del cierre del tubo neural durante la embriogénesis. Su contenido incluye una variedad de derivados del ectodermo como glándulas apocrinas, sudor, quistes sebáceos, folículos pilosos, epitelio escamoso y dientes. Los síntomas que generan estos tumores benignos son tanto por el efecto de masa sobre las estructuras neurovasculares adyacentes (cefalea, convulsiones, hidrocefalia, isquemia, como por la irritación meníngea en los casos de ruptura hacia el espacio subaracnoideo. Objetivo: Presentar el curso clínico de paciente femenino de 21 años de edad, que acude a la consulta de neurocirugía con clínica de cefalea y síncope. Presentación del caso: Paciente con rotura espontánea de un quiste dermoide intracraneal que consultaba previamente por clínica de cefalea, a la cual se asocia más recientemente episodios de alteración de la conciencia, realizándose estudio de neuroimágenes con evidencia de quiste dermoide intracraneal roto, el cual fue manejado quirúrgicamente con resolución exitosa de la sintomatología. Conclusiones: Se considera relevante el caso teniendo en cuenta lo inusual de la patología según la epidemiología consultada, además este reporte de caso, permite sensibilizar al personal de salud sobre esta patología tumoral la cual puede llegar a la cura en caso de resección quirúrgica completa, con resolución de la clínica.

MRI-Guided Percutaneous Biopsy of Mediastinal Masses Using a Large Bore Magnet: Technical Feasibility

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Garnon, J., E-mail: juliengarnon@gmail.com [Nouvel Hôpital Civil, Department of Interventional Radiology (France); Ramamurthy, N., E-mail: nitin-ramamurthy@hotmail.com [Norfolk and Norwich University Hospital, Department of Radiology (United Kingdom); Caudrelier J, J., E-mail: caudjean@yahoo.fr [Nouvel Hôpital Civil, Department of Interventional Radiology (France); Erceg, G., E-mail: erceggorislav@yahoo.com; Breton, E., E-mail: ebreton@unistra.fr [ICube, University of Strasbourg, CNRS (France); Tsoumakidou, G., E-mail: gtsoumakidou@yahoo.com; Rao, P., E-mail: pramodrao@me.com; Gangi, A., E-mail: gangi@unistra.fr [Nouvel Hôpital Civil, Department of Interventional Radiology (France)

2016-05-15

ObjectiveTo evaluate the diagnostic accuracy and safety of magnetic resonance imaging (MRI)-guided percutaneous biopsy of mediastinal masses performed using a wide-bore high-field scanner.Materials and MethodsThis is a retrospective study of 16 consecutive patients (8 male, 8 female; mean age 74 years) who underwent MRI-guided core needle biopsy of a mediastinal mass between February 2010 and January 2014. Size and location of lesion, approach taken, time for needle placement, overall duration of procedure, and post-procedural complications were evaluated. Technical success rates and correlation with surgical pathology (where available) were assessed.ResultsTarget lesions were located in the anterior (n = 13), middle (n = 2), and posterior mediastinum (n = 1), respectively. Mean size was 7.2 cm (range 3.6–11 cm). Average time for needle placement was 9.4 min (range 3–18 min); average duration of entire procedure was 42 min (range 27–62 min). 2–5 core samples were obtained from each lesion (mean 2.6). Technical success rate was 100 %, with specimens successfully obtained in all 16 patients. There were no immediate complications. Histopathology revealed malignancy in 12 cases (4 of which were surgically confirmed), benign lesions in 3 cases (1 of which was false negative following surgical resection), and one inconclusive specimen (treated as inaccurate since repeat CT-guided biopsy demonstrated thymic hyperplasia). Sensitivity, specificity, positive predictive value, negative predictive value, and accuracy in our study were 92.3, 100, 100, 66.7, and 87.5 %, respectively.ConclusionMRI-guided mediastinal biopsy is a safe procedure with high diagnostic accuracy, which may offer a non-ionizing alternative to CT guidance.

In patients with post-sternotomy mediastinitis is vacuum-assisted closure superior to conventional therapy?

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Yu, Angela W; Rippel, Radoslaw A; Smock, Elliott; Jarral, Omar A

2013-11-01

A best evidence topic in cardiac surgery was written according to a structured protocol. The question addressed was whether vacuum-assisted closure therapy (VAC) is superior to conventional therapy for treating post-sternotomy mediastinitis. Altogether >261 papers were found using the reported search, of which 9 represented the best evidence to answer the clinical question. The authors, journal, date and country of publication, patient group studied, study type, relevant outcomes and results of these papers are tabulated. Several studies indicate that VAC therapy is associated with shorter lengths of intensive care and in-hospital stay as well as faster rates of wound healing and fewer dressing changes. It has also been shown that VAC therapy is correlated with a statistically significant reduction in reinfection rates, particularly those that occur in the early postoperative period (at the 1-week follow-up). Patients can be discharged with the dressing in situ and managed in the community with a view to delayed closure or reconstruction. However, the studies comparing VAC with conventional therapy are all retrospective in nature and reinforce the need for randomized controlled trials in order to more accurately establish differences in outcomes between VAC and conventional therapy. Additionally, owing tło the variability of treatment protocols within the non-VAC arm, it is more challenging to draw definitive conclusions regarding the superiority of VAC therapy to every modality that is considered conventional treatment. We conclude that VAC therapy is a portable and an increasingly economical option for the treatment of post sternotomy mediastinitis. Although reductions in mortality rates were not reproduced in all studies, evidence suggests that VAC should still be considered as a first-line therapy for post-sternotomy mediastinitis and as a bridge therapy to musculocutaneous reconstruction or primary closure.

Aplicación del diseño experimental para el desarrollo de masas para panificación con ingredientes no tradicionales

OpenAIRE

Pinos Vélez, Verónica Patricia

2006-01-01

El propósito del trabajo de investigación fue desarrollar un pan de dulce y uno de sal, con ingredientes enriquecedores nutritivos. Cada producto tuvo 11 ingredientes variables. Para evaluar estos modelos multivariantes se tendían que realizar 2059 experimentos; pero gracias al empleo del diseño experimental se relucieron a 12 experimentos por pan, la reducción se hizo con la matriz de Plackett Burmman, para 11 variables. Simultáneamente se realizaron encuestas de aceptación de característ...

Increasing the accuracy of 18F-FDG PET/CT interpretation of “mildly positive” mediastinal nodes in the staging of non-small cell lung cancer

International Nuclear Information System (INIS)

Moloney, F.; Ryan, D.; McCarthy, L.; McCarthy, J.; Burke, L.; Henry, M.T.; Kennedy, M.P.; Hinchion, J.; McSweeney, S.; Maher, M.M.; O’Regan, K.

2014-01-01

Introduction: The aim of this study was to identify radiological factors that may reduce false-positive results and increase diagnostic accuracy when staging the mediastinum of patients with non-small cell lung carcinoma (NSCLC). Methods: This was a retrospective, interdisciplinary, per-node analysis study. We included patients with NSCLC and mediastinal nodes with an SUV max in the range of 2.5–4.0 on PET-CT. We hypothesized that the greatest number of false positive cases would occur in this cohort of patients. Results: A total of 92 mediastinal lymph nodes were analyzed in 44 patients. Mediastinal disease (N2/N3) was histologically confirmed in 15 of 44 patients and in 34 of 92 lymph nodes; positive predictive value of 37% and false positive rate of 63%. Lymph node SUV max, tumor size, ratio of node SUV max to tumor SUV max (SUVn/SUVp), and ratio of node SUV max to node size (SUV n/SADn) were significantly higher in true positive cases. Using a threshold of 0.3 for SUV node/tumor and 3 for SUV node/size yielded sensitivities of 91% and 71% and specificities of 71% and 69% respectively for the detection of mediastinal disease. Using both ratios in combination resulted in a sensitivity of 65% and a specificity of 88%. Concurrent benign lung disease was observed significantly more frequently in false-positive cases. Conclusion: SUVn/SUVpt and SUVn/SADn may be complimentary to conventional visual interpretation and SUV max measurement in the assessment of mediastinal disease in patients with NSCLC

Longterm effects of cardiac mediastinal nerve cryoablation on neural inducibility of atrial fibrillation in canines.

Science.gov (United States)

Leiria, Tiago Luiz Luz; Glavinovic, Tamara; Armour, J Andrew; Cardinal, René; de Lima, Gustavo Glotz; Kus, Teresa

2011-04-26

In canines, excessive activation of select mediastinal nerve inputs to the intrinsic cardiac nervous system induces atrial fibrillation (AF). Since ablation of neural elements is proposed as an adjunct to circumferential pulmonary vein ablation for AF, we investigated the short and long-term effects of mediastinal nerve ablation on AF inducibility. Under general anesthesia, in 11 dogs several mediastinal nerve sites were identified on the superior vena cava that, when stimulated electrically during the atrial refractory period, reproducibly initiated AF. Cryoablation of one nerve site was then performed and inducibility retested early (1-2 months post Cryo; n=7) or late (4 months post Cryo; n=4). Four additional dogs that underwent a sham procedure were retested 1 to 2 months post-surgery. Stimulation induced AF at 91% of nerve sites tested in control versus 21% nerve sites early and 54% late post-ablation (both P<0.05). Fewer stimuli were required to induce AF in controls versus the Early Cryo group; this capacity returned to normal values in the Late Cryo group. AF episodes were longer in control versus the Early or Late Cryo groups. Heart rate responses to vagal or stellate ganglion stimulation, as well as to local nicotine infusion into the right coronary artery, were similar in all groups. In conclusion, focal damage to intrinsic cardiac neuronal inputs causes short-term stunning of neuronal inducibility of AF without major loss of overall adrenergic or cholinergic efferent neuronal control. That recovery of AF inducibility occurs rapidly post-surgery indicates the plasticity of intrathoracic neuronal elements to focal injury. Copyright © 2011 Elsevier B.V. All rights reserved.

Diagnostic Yield of CT-Guided Percutaneous Transthoracic Needle Biopsy for Diagnosis of Anterior Mediastinal Masses.

Science.gov (United States)

Petranovic, Milena; Gilman, Matthew D; Muniappan, Ashok; Hasserjian, Robert P; Digumarthy, Subba R; Muse, Victorine V; Sharma, Amita; Shepard, Jo-Anne O; Wu, Carol C

2015-10-01

The purpose of this study was to evaluate the diagnostic yield and accuracy of CT-guided percutaneous biopsy of anterior mediastinal masses and assess prebiopsy characteristics that may help to select patients with the highest diagnostic yield. Retrospective review of all CT-guided percutaneous biopsies of the anterior mediastinum conducted at our institution from January 2003 through December 2012 was performed to collect data regarding patient demographics, imaging characteristics of biopsied masses, presence of complications, and subsequent surgical intervention or medical treatment (or both). Cytology, core biopsy pathology, and surgical pathology results were recorded. A per-patient analysis was performed using two-tailed t test, Fisher's exact test, and Pearson chi-square test. The study cohort included 52 patients (32 men, 20 women; mean age, 49 years) with mean diameter of mediastinal mass of 6.9 cm. Diagnostic yield of CT-guided percutaneous biopsy was 77% (40/52), highest for thymic neoplasms (100% [11/11]). Non-diagnostic results were seen in 12 of 52 patients (23%), primarily in patients with lymphoma (75% [9/12]). Fine-needle aspiration yielded the correct diagnosis in 31 of 52 patients (60%), and core biopsy had a diagnostic rate of 77% (36/47). None of the core biopsies were discordant with surgical pathology. There was no statistically significant difference between the diagnostic and the nondiagnostic groups in patient age, lesion size, and presence of necrosis. The complication rate was 3.8% (2/52), all small self-resolving pneumothoraces. CT-guided percutaneous biopsy is a safe diagnostic procedure with high diagnostic yield (77%) for anterior mediastinal lesions, highest for thymic neoplasms (100%), and can potentially obviate more invasive procedures.

The concept of negative pressure wound therapy (NPWT) after poststernotomy mediastinitis--a single center experience with 54 patients.

Science.gov (United States)

Ennker, Ina C; Malkoc, Anita; Pietrowski, Detlef; Vogt, Peter M; Ennker, Juergen; Albert, Alexander

2009-01-12

Deep sternal infections, also known as poststernotomy mediastinitis, are a rare but often fatal complication in cardiac surgery. They are a cause of increased morbidity and mortality and have a significant socioeconomic aspect concerning the health system. Negative pressure wound therapy (NPWT) followed by muscular pectoralis plasty is a quite new technique for the treatment of mediastinitis after sternotomy. Although it could be demonstrated that this technique is at least as safe and reliable as other techniques for the therapy of deep sternal infections, complications are not absent. We report about our experiences and complications using this therapy in a set of 54 patients out of 3668 patients undergoing cardiac surgery in our institution between January 2005 and April 2007.

Posterior mediastinal biphasic synovial sarcoma in a 12 year-old boy: A case report and review of literature

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Pal Madhumay

2010-01-01

Full Text Available We report a case of biphasic synovial sarcoma of the mediastinum, a very rare tumor, in a 12-year-old boy with left-sided chest pain of 3 years duration at presentation. Chest X-ray showed left-sided opacity with loss of cardiac silhouette and the mediastinum deviated to the opposite side. Computed tomography (CT of thorax showed left-sided posterior mediastinal mass with left-sided pleural effusion and pleural thickening. CT guided fine needle aspiration cytology (FNAC from the mass reported it as spindle cell variant of adenocarcinoma. Ultrasonography (USG of the whole abdomen revealed no abnormality. The mediastinal tumor was resected by left thoracotomy and histopathological report confirmed it to be a biphasic synovial sarcoma with capsule invasion at places.

Anterior Mediastinal Mass in a Young Marijuana Smoker: A Rare Case of Small-Cell Lung Cancer

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Jiten P. Kothadia

2012-01-01

Full Text Available The use of cannabis is embedded within many societies, mostly used by the young and widely perceived to be safe. Increasing concern regarding the potential for cannabis to cause mental health effects has dominated cannabis research, and the potential adverse respiratory effects have received relatively little attention. We report a rare case of 22-year-old man who presented with bilateral neck lymphadenopathy, fatigue, and sore throat without significant medical or family history. The patient had smoked one marijuana joint three times a week for three years but no cigarettes. Chest CT demonstrated a large anterior mediastinal mass compressing the superior vena cava and mediastinal lymphadenopathy. A final diagnosis of small-cell lung cancer was reached. Although rare, a small-cell lung cancer in this patient should alert the physician that cannabis smoking may be a risk factor for lung cancer.

Kajian Pengaruh Radiasi Sinar Gamma Terhadap Susut Bobot Pada Buah Jambu Biji Merah Selama Masa Penyimpanan

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M. Akrom

2014-01-01

Full Text Available Telah dilakukan radiasi pada sampel jambu biji merah (psidium guajava linn pada variasi dosis 0.2, 0.4, 0.6, 0.8, dan 1 kGy menggunakan sinar gamma dengan sumber isotop Co-60 serta sampel yang tidak diradiasi sebagai sampel kontrol. Penelitian ini bertujuan untuk mengetahui pengaruh radiasi sinar gamma terhadap susut bobot sebagai indikasi dari terjadinya perlambatan proses fisiologis pada buah jambu biji merah selama masa penyimpanan. Sampel jambu biji merah diradiasi sesuai dosis yang ditentukan kemudian disimpan dalam wadah plastik selama 8 hari masa penyimpanan. Hari ke 4 dan ke 8 dilakukan evaluasi terhadap massa sampel untuk mengetahui penyusutan bobot yang terjadi. Hasilnya menunjukkan bahwa sampel yang tidak diradiasi mengalami penyusutan bobot rata-rata 20.27% dan sampel yang diradiasi mengalami penyusutan bobot rata-rata sebesar 1.23 – 5.98%. Perlakuan radiasi gamma mampu memperlambat proses fisiologis dimana terjadi perlambatan penyusutan bobot pada buah jambu biji merah selama masa penyimpanan. The samples of red guava (psidium guajava linn have been irradiated at variation doses of 0.2, 0.4, 0.6, 0.8, and 1 kGy using gamma rays with Co-60 isotope source and un-irradiated samples as control. The purpose of this research was to determine the effect of gamma irradiation on shrinkage weights as indication of slowing in physiological processes on red guava fruit during storage. Red guava fruit samples were irradiated in certain doses then saved in plastic pan during 8 days storage time. The fourth and eighth day sample mass was measured to determine the shrinkage of the weight. The result showed that un-irradiated sample was shrinkage weighted average 20.27% and the samples were irradiated shrinkage weight by an average of 1.23 to 5.98%. Gamma irradiation is able to slow the physiological processes which cause shrinkage weight on red guava fruit during storage.

Osteoporosis grave con aplastamientos vertebrales en dermatomiositis juvenil: Efecto del tratamiento con alendronato oral Severe osteoporosis with vertebral crushes in juvenile dermatomyositis: Effect of oral alendronate therapy

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Cristina Tau

2007-02-01

Full Text Available Los glucocorticoides son usados comúnmente para el tratamiento de enfermedades inflamatorias, autoinmunes, enfermedades malignas, y en la prevención de rechazo de órganos trasplantados. Un efecto secundario frecuente del tratamiento prolongado es la pérdida de masa ósea que se produce por varios mecanismos y es causa de osteoporosis y fracturas vertebrales. El tratamiento con disfosfonatos ha sido propuesto para esta situación. Presentamos un caso clínico de osteoporosis grave en una niña con dermatomiositis juvenil, que respondió favorablemente al tratamiento con disfosfonatos orales.Glucocorticoids are used for the treatment of inflammatory and autoimmune diseases, cancer, and in prevention of organ rejects. A frequent secondary effect of longterm treatment with corticoids is the loss of bone mass, caused by several mechanisms: decrease in the intestinal calcium absorption, increase of the renal calcium excretion at the distal renal tubule, suppressive effect on the osteoblast and also in apoptosis of osteoclasts, inhibition in local production of IGF I (Insulin-like growth factor and IGFBPs (binding IGF I proteins necessary for bone metabolism, and decrease on osteocalcin production. Longterm treatment with corticoids is associated with osteoporosis and vertebral fractures. To improve this condition, treatment with bisphosphonates has been proposed. We present here a clinical case of a girl with dermatomyositis and severe osteoporosis with vertebral crushes, who responded well to oral bisphophonate treatment.

A rare constellation of empyema, lung abscess, and mediastinal abscess as a complication of endobronchial ultrasound-guided transbronchial needle aspiration.

Science.gov (United States)

Huang, Chun-Ta; Chen, Chung-Yu; Ho, Chao-Chi; Yu, Chong-Jen

2011-07-01

The introduction of endobronchial ultrasound-guided transbronchial needle aspiration (EBUS-TBNA) brought about significant advancement in the field of bronchoscopy. The major indications for EBUS-TBNA are lung cancer staging and diagnosis of mediastinal lymphadenopathy. This procedure is minimally invasive and cost saving, and no complications have been described in large-scale studies. In this report, we present a case of empyema, lung abscess, and mediastinal abscess that developed in a patient undergoing EBUS-TBNA; the patient subsequently recovered uneventfully after aggressive surgical debridement and antimicrobial therapy. Copyright © 2010 European Association for Cardio-Thoracic Surgery. Published by Elsevier B.V. All rights reserved.

“Manually Ventilating Test” in Anesthesia Management of Children with Massive Anterior Mediastinal Masses Requiring Tracheal Intubation.A case series

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Mohammad Gharavi

2014-08-01

Full Text Available The risk of life-threatening complications during induction of anesthesia in patients with anterior mediastinal mass is well recognized. Maintenance of spontaneous ventilation during anesthesia is an accepted standard goal in all published reports. However, the decision to paralyze the patient, which is really needed in most surgical procedures, is still a challenging event. In this study, “manually ventilating test” as a predictive test was assessed to make the decision to paralyze children with massive anterior mediastinal masses who needed tracheal intubation. . It seems that manually ventilating test may at least be a simple and reliable test to identify cases that could be paralyzed successfully

Fatal mediastinal biopsy: How interventional radiology saves the day

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Y Yaacob

2012-01-01

Full Text Available This was a case of a 35-year-old man with mediastinal mass requiring computed tomography (CT-guided biopsy for tissue diagnosis. A posterior approach with an 18-gauge biopsy needle was used to obtain tissue sample. Post biopsy, patient condition deteriorated and multiphase CT study detected active bleeding in arterial phase at the biopsy site with massive hemothorax. Subsequent angiography showed arterial bleeder arising from the apical branch of the right pulmonary artery. Selective endovascular embolization with NBCA (n-Butyl cyanoacrylate was successful. Patient survived the complication. The case highlighted a rare complication in a common radiology procedure and the value of the interventional radiology unit in avoiding a fatal outcome.

The role of positron emission tomography in mediastinal staging of patients with non-small cell lung cancer.

Science.gov (United States)

d'Amico, Andrea; Turska-d'Amico, Maria; Jarzab, Barbara; Zielinski, Marcin

2015-01-01

To examine the diagnostic accuracy of positron emission tomography/computed tomography in evaluating the mediastinum of patients with non-small cell lung cancer compared to histopathology results. The prospective study was conducted at the Department of Thoracic Surgery of the Pulmonary Hospital in Zakopane, Poland, from September 2008 to August 2012 and comprised patients with radiologically-suspected lung cancer. All patients underwent histological verification by either mediastinoscopy alone or thoracotomy with mediastinal lymphanedectomy. Computed tomography and positron emission tomography/computed tomography data sets were compared with the results of the histopathology examinations. There were 80 patients in the study. In the diagnosis of mediastinal lymph nodes, computed tomography was able to detect 9(11.25%) true-positive, 17(21.25%) false-positive, 40(50%) true-negative and 14(17.5%) false-negative cases. The sensitivity, specificity and accuracy of the method were found to be 39%, 70% and 61% respectively, while the positive and negative predictive values were 35% and 74%. Positron emission tomography/computed tomography yielded 15(18.75%) true-positive, 12(15%) false-positive, 46(57.5%) true-negative and 7(8.75%) false-negative cases. Sensitivity was 68% while specificity was 79%. The accuracy was 96%, and the positive and negative predictive values were 55% and 87% respectively. Positron emission tomography/computed tomography had higher diagnostic accuracy than computed tomography in assessing mediastinal lymph nodes of patients with non-small cell lung cancer. However, a positive test requires histopathology confirmation.

European Association for Cardio-Thoracic Surgery expert consensus statement on the prevention and management of mediastinitis

DEFF Research Database (Denmark)

Abu-Omar, Yasir; Kocher, Gregor J; Bosco, Paolo

2017-01-01

Mediastinitis continues to be an important and life-threatening complication after median sternotomy despite advances in prevention and treatment strategies, with an incidence of 0.25-5%. It can also occur as extension of infection from adjacent structures such as the oesophagus, airways and lung...

Mediastinal lymph node dissection versus mediastinal lymph node sampling for early stage non-small cell lung cancer: a systematic review and meta-analysis.

Science.gov (United States)

Huang, Xiongfeng; Wang, Jianmin; Chen, Qiao; Jiang, Jielin

2014-01-01

This systematic review and meta-analysis aimed to evaluate the overall survival, local recurrence, distant metastasis, and complications of mediastinal lymph node dissection (MLND) versus mediastinal lymph node sampling (MLNS) in stage I-IIIA non-small cell lung cancer (NSCLC) patients. A systematic search of published literature was conducted using the main databases (MEDLINE, PubMed, EMBASE, and Cochrane databases) to identify relevant randomized controlled trials that compared MLND vs. MLNS in NSCLC patients. Methodological quality of included randomized controlled trials was assessed according to the criteria from the Cochrane Handbook for Systematic Review of Interventions (Version 5.1.0). Meta-analysis was performed using The Cochrane Collaboration's Review Manager 5.3. The results of the meta-analysis were expressed as hazard ratio (HR) or risk ratio (RR), with their corresponding 95% confidence interval (CI). We included results reported from six randomized controlled trials, with a total of 1,791 patients included in the primary meta-analysis. Compared to MLNS in NSCLC patients, there was no statistically significant difference in MLND on overall survival (HR = 0.77, 95% CI 0.55 to 1.08; P = 0.13). In addition, the results indicated that local recurrence rate (RR = 0.93, 95% CI 0.68 to 1.28; P = 0.67), distant metastasis rate (RR = 0.88, 95% CI 0.74 to 1.04; P = 0.15), and total complications rate (RR = 1.10, 95% CI 0.67 to 1.79; P = 0.72) were similar, no significant difference found between the two groups. Results for overall survival, local recurrence rate, and distant metastasis rate were similar between MLND and MLNS in early stage NSCLC patients. There was no evidence that MLND increased complications compared with MLNS. Whether or not MLND is superior to MLNS for stage II-IIIA remains to be determined.

MODELO PARA SIMULACIÓN DE PROCESOS DE REMOCIÓN EN MASA DESAGREGADOS. COMPARACIÓN CON EL MÉTODO DE TALUD INFINITO

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Mario Germán Trujillo Vela

2012-01-01

Full Text Available Como una forma alternativa a los métodos convencionales para analizar la estabilidad de taludes, este artículo implementa un procedimiento para modelar los flujos de material desagregado que parten de la mecánica de medios continuos (perspectiva Euleriana, propuesta por Iverson y Delinger [1]. Esta metodología supone el comportamiento de una mezcla de fluido newtoniano y sólido cuya interacción friccional se representa por la ley de fricción de Coulomb. La ecuación de momentum es simplificada de tal forma que permite generar una solución analítica, a la cual se le hizo un análisis de sensibilidad. Los resultados del análisis de sensibilidad muestran que los parámetros que más influyen en el modelo son: el ángulo de talud, el ángulo de fricción del lecho y la fracción de presión de poros, que a su vez, determinan la estabilidad del talud. Como ventaja adicional a los métodos usuales de estabilidad de taludes basados en equilibrio límite, el método implementado además de tener en cuenta el modo de deformación en campo, entrega el factor de seguridad, y lo más importante, calcula la velocidad de la masa deslizada y la distancia que recorre. Los resultados se pueden utilizar como insumo parcial para evaluar tanto la amenaza probabilística como la vulnerabilidad de infraestructura afectada por flujo de material desagregado.

PENGARUH PENAMBAHAN KALIUM PADA MASA ADAPTASI PENURUNAN SALINITAS TERHADAP PERFORMA PASCALARVA UDANG VANAMEI (Litopenaeus vannamei

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Ferdinand Hukama Taqwa

2008-12-01

Full Text Available Tujuan penelitian ini adalah untuk mengetahui pengaruh penambahan kalium selama masa adaptasi penurunan salinitas terhadap performa pascalarva udang vanamei. Penelitian ini dilaksanakan untuk mendapatkan kadar kalium optimal yang dapat menurunkan tingkat stres dan meningkatkan sintasan pascalarva udang vanamei setelah melalui masa adaptasi penurunan salinitas. Hewan uji yang digunakan adalah PL20 udang vanamei. Rancangan percobaan menggunakan rancangan acak lengkap dengan perlakuan yang diterapkan adalah penambahan kalium ke air tawar pengencer masing-masing sebanyak 0 mg/L (A, 25 mg/L (B, 50 mg/L (C, dan 75 mg/L (D. Penurunan salinitas dilakukan secara gradual selama 4 hari dari salinitas 25 ppt hingga mencapai 2 ppt. Hasil percobaan menunjukkan bahwa penambahan kalium sebanyak 25 mg/L hingga kadar kalium media menjadi 51 mg/L dapat mengurangi pembelanjaan energi untuk osmoregulasi, tingkat stres, dan laju metabolisme standar sehingga meningkatkan sintasan pascalarva udang vanamei setelah melalui masa adaptasi penurunan salinitas selama 96 jam (4 hari. The objective of this research was to study the effect of potassium addition during salinity acclimatization from 25 ppt down to 2 ppt on the performance of Litopenaeus vannamei postlarvae. This experiment was done to determine optimal dosage of potassium which can reduce stress level and increase survival rate of L. vannamei postlarvae after salinity acclimatization. Specimen test used was PL20 of white shrimp (0.001 g. Experimental design used completely randomized design with four treatments and three replications of different potassium addition levels to freshwater: 0 mg/L (A, 25 mg/L (B, 50 mg/L (C, and 75 mg/L (D. Dilution of salinity was done gradually using freshwater during 4 days from 25 ppt down to 2 ppt. The result of this experiment indicated that the addition of 25 mg/L potassium (potassium level in media was 51 mg/L reduced the energy cost for osmoregulation, level of stress and

Challenging posterior mediastinal mass resection via a minimally invasive approach with neurological monitoring.

Science.gov (United States)

Smail, Hassiba; Baste, Jean Marc; Melki, Jean; Peillon, Christophe

2013-02-01

We report a novel surgical strategy for the resection of a rare type of posterior mediastinal tumour in a young patient. A melanotic schwannoma arose from the left thoracic sympathetic chain, adjacent to the origin of the artery of Adamkiewicz. Successful excision of this tumour via a minimally invasive approach without arterial or spinal cord injury was possible with the aid of neurological monitoring using spinal-evoked potentials.

Estilo de afrontamiento, optimismo disposicional, depresión, imagen corporal, imc, y riesgo de tca como predictores de calidad de vida relacionada con la salud

OpenAIRE

Londoño, Constanza; UNIVERSIDAD CATÓLICA DE COLOMBIA; Velasco, Ruth; UNIVERSIDAD CATOLICA DE COLOMBIA

2015-01-01

Esta investigación tenía como objetivo determinar si el estilo de afrontamiento, el optimismo disposicional, la depresión, la imagen corporal, el riesgo de padecer un trastorno de conducta alimentaria, el índice de masa corporal y la edad, en interacción, predicen la calidad de vida relacionada con la salud en una muestra de 411 personas de 15 a 70 años. Se utilizó el Cuestionario de Estilos de Afrontamiento, el Cuestionario de optimismo disposicional, el Cuestionario Beck de depresión segund...

Estilo de afrontamiento, optimismo disposicional, depresión, imagen corporal, IMC, y riesgo de TCA como predictores de calidad de vida relacionada con la salud

OpenAIRE

Londoño Pérez, Constanza; Velasco Salamanca, Marcela

2015-01-01

Esta investigación tenía como objetivo determinar si el estilo de afrontamiento, el optimismo disposicional, la depresión, la imagen corporal, el riesgo de padecer un trastorno de conducta alimentaria, el índice de masa corporal y la edad, en interacción, predicen la calidad de vida relacionada con la salud en una muestra de 411 personas de 15 a 70 años. Se utilizó el Cuestionario de Estilos de Afrontamiento, el Cuestionario de optimismo disposicional, el Cuestionario Beck de depresión segund...

Capacidad aeróbica, felicidad y satisfacción con la vida en adolescentes españoles

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Juan A. Jim\\u00E9nez-Moral

2013-01-01

Full Text Available Objetivos: Analizar la asociación entre capacidad aeróbica, felicidad subjetiva y satisfacción con la vida en adolescentes. Método: Participaron 388 adolescentes (207 mujeres de 12-18 años de edad. La capacidad aeróbica se evaluó mediante el test de 20 metros de ida y vuelta. La felicidad subjetiva y la satisfacción con la vida se evaluaron mediante las escalas Subjective Happiness Scale y Satisfaction With Life Scale, respectivamente. Se midió el peso y la talla de los adolescentes y se calculó el índice de masa corporal (IMC. Los adolescentes indicaron el nivel de estudios de la madre. Resultados: Los análisis de regresión lineal mostraron que la capacidad aeróbica se asocia positivamente con felicidad subjetiva (ß no estandarizada = .09 ± .03, r = .128, p = .013 y satisfacción con la vida (ß no estandarizada = .31 ± .13, r = .118, p = .022, independientemente del sexo, IMC y estudios de la madre. Conclusión: Los resultados de este estudio sugieren que los adolescentes que tienen una mejor capacidad aeróbica también son más felices y tienen una mayor satisfacción con la vida. Hacen falta estudios de intervención para corroborar si un programa dirigido a la mejora de la capacidad aeróbica puede inducir también mejoras en los niveles de felicidad y satisfacción con la vida en adolescentes.

The value of STIR sequence in the characterization of mediastinal lymph nodes

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Aylin Okur

2013-12-01

Full Text Available INTRODUCTION: To investigate availability of Short Time Inversion Recovery Turbo Spin Echo Magnetic Resonance imaging (STIR TSE MRI in the detection of mediastinal lymph nodes and in the distinguishing malign and benign lymph nodes detected in cases with pulmonary lesions. METHODS: Overall, 46 patients having mediastinal lymph nodes with confirmed or suspected lung cancer were included to the study. All patients underwent STIR TSE MR imaging before mediastinoscopy. Lymph nodes were assessed by signal characteristics on STIR TSE MRI. The results of histopathological evaluation and STIR TSE MRI were compared after mediastinoscopy. As data were qualitative, distributions were expressed as percentage and chi-square test was used to determine the difference between variables. RESULTS: Overall, 92 lymph nodes were analyzed. When a comparison was made between malign and benign lymph nodes, a significant difference was found between STIR MRI signal properties of lymph nodes and lymph node size. The specificity, sensitivity, positive predictive value and negative predictive value of STIR TSE MRI were estimated as 75.0%, 75.0%, 61.5% and 83.3%, respectively. DISCUSSION AND CONCLUSION: Although the negative predictive value is high in STIR TSE MRI, it has a low positive predictive value. Thus, the case may directly undergo surgery without performing mediastinoscopy when no malign lymph node is detected in STIR TSE MRI, while mediastinoscopy is warranted when a malign lymph node is detected.

Response of the mediastinal and thoracic viscera of the dog to intraoperative radiation therapy (IORT)

International Nuclear Information System (INIS)

Barnes, M.; Pass, H.; DeLuca, A.; Tochner, Z.; Potter, D.; Terrill, R.; Sindelar, W.F.; Kinsella, T.J.

1987-01-01

IORT may be a potentially useful adjunctive treatment combined with surgery and/or external beam irradiation in treating locally advanced lung and esophageal tumors. To begin investigation of this modality, the tolerance of intact mediastinal structures to IORT was studied using adult American Foxhounds (wt. 25-30 kg). Groups of six animals received IORT to doses of 20, 30, or 40 Gy to two separate intrathoracic ports, using 9 MeV electrons to treat a portion of the collapsed right upper lobe, and 12 MeV electrons to treat the mediastinal structures. A group of three dogs received thoracotomy with sham irradiation. Two dogs from each treatment dose group, as well as one sham-irradiated control, were sacrificed electively at 1, 3, and 12 months following IORT. There were no acute nor late IORT related mortalities. Post-operative weight loss was minimal (average 4.5% of pre-operative weight) for all dogs. Serial esophagrams showed no inflammation or ulceration. No cardiac nor pulmonary changes were noted clinically. At autopsy, the irradiated lung showed evidence of acute pneumonitis at 1 month with progressive fibrosis at 3 months and 1 year. Esophageal reactions were minimal, with only two dogs (one 30 Gy and one 40 Gy) demonstrating histologically confirmed esophagitis at 1 month. Tracheal changes were minimal. Cardiac damage was evident in the right atrial tissues. In several dogs, this cardiac damage ranged from myocardial vascular changes to frank ischemic necrosis noted at 1 and 3 months, and dense fibrosis at 1 year. The phrenic nerves showed normal function, but had evidence of perineural fibrosis. The large vessels demonstrated only mild histologic evidence of irradiation. The results of this large animal study suggest that intact mediastinal structures will tolerate small volume IORT to doses of 20 Gy without significant clinical sequellae. (Abstract Truncated)

Response of the mediastinal and thoracic viscera of the dog to intraoperative radiation therapy (IORT)

Energy Technology Data Exchange (ETDEWEB)

Barnes, M.; Pass, H.; DeLuca, A.; Tochner, Z.; Potter, D.; Terrill, R.; Sindelar, W.F.; Kinsella, T.J.

1987-03-01

IORT may be a potentially useful adjunctive treatment combined with surgery and/or external beam irradiation in treating locally advanced lung and esophageal tumors. To begin investigation of this modality, the tolerance of intact mediastinal structures to IORT was studied using adult American Foxhounds (wt. 25-30 kg). Groups of six animals received IORT to doses of 20, 30, or 40 Gy to two separate intrathoracic ports, using 9 MeV electrons to treat a portion of the collapsed right upper lobe, and 12 MeV electrons to treat the mediastinal structures. A group of three dogs received thoracotomy with sham irradiation. Two dogs from each treatment dose group, as well as one sham-irradiated control, were sacrificed electively at 1, 3, and 12 months following IORT. There were no acute nor late IORT related mortalities. Post-operative weight loss was minimal (average 4.5% of pre-operative weight) for all dogs. Serial esophagrams showed no inflammation or ulceration. No cardiac nor pulmonary changes were noted clinically. At autopsy, the irradiated lung showed evidence of acute pneumonitis at 1 month with progressive fibrosis at 3 months and 1 year. Esophageal reactions were minimal, with only two dogs (one 30 Gy and one 40 Gy) demonstrating histologically confirmed esophagitis at 1 month. Tracheal changes were minimal. Cardiac damage was evident in the right atrial tissues. In several dogs, this cardiac damage ranged from myocardial vascular changes to frank ischemic necrosis noted at 1 and 3 months, and dense fibrosis at 1 year. The phrenic nerves showed normal function, but had evidence of perineural fibrosis. The large vessels demonstrated only mild histologic evidence of irradiation. The results of this large animal study suggest that intact mediastinal structures will tolerate small volume IORT to doses of 20 Gy without significant clinical sequellae. (Abstract Truncated)

The concept of negative pressure wound therapy (NPWT after poststernotomy mediastinitis – a single center experience with 54 patients

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Vogt Peter M

2009-01-01

Full Text Available Abstract Deep sternal infections, also known as poststernotomy mediastinitis, are a rare but often fatal complication in cardiac surgery. They are a cause of increased morbidity and mortality and have a significant socioeconomic aspect concerning the health system. Negative pressure wound therapy (NPWT followed by muscular pectoralis plasty is a quite new technique for the treatment of mediastinitis after sternotomy. Although it could be demonstrated that this technique is at least as safe and reliable as other techniques for the therapy of deep sternal infections, complications are not absent. We report about our experiences and complications using this therapy in a set of 54 patients out of 3668 patients undergoing cardiac surgery in our institution between January 2005 and April 2007.

Pulmonary venous varix associated with mitral regurgitation mimicking a mediastinal mass: A case report and review of the literature

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Dana AlNuaimi, MD

2018-04-01

Full Text Available Pulmonary vein varix is an unusual cause of a mediastinal mass on a chest radiograph. It may be found as an isolated malformation or as a sequela of pulmonary venous hypertension. We encountered a case presenting with left hemiparesis and a past medical history of rheumatic heart disease. The chest radiograph revealed a well-defined mediastinal mass that turned out to be a hugely dilated pulmonary vein on contrast enhanced computed tomography of the chest. The computed tomography of the brain and upper abdomen revealed bilateral cerebral infarction and splenic infarction. In the literature, one-third of the reported cases of pulmonary vein varix are acquired secondary to mitral valve disease. Keywords: Pulmonary venous varix, Mitral valve insufficiency, Cerebral infarction, Splenic infarction, Computed tomography

Natureza, classificação e intervenções de enfermagem para pacientes com mediastinite Naturlaleza, clasificación y intervenciones de enfermería para pacientes con mediastinitis Nature, classification and nursing interventios for patients with mediastinitis

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Amélia Rodrigues de Almeida

2008-08-01

retrospective study that aimed at analyzing the nature and classification of nursing interventions for patients with mediastinitis following cardiac surgery. The results obtained from the surgical wards show an incidence of mediastinitis of 3%. The subjects studies were primarily male, all of whom suffer from diabetes. The nursing problems were categorized according to Horta and the interventions according to the NIC. Among the problems found, 76.5% were of psychobiological needs and 23.5% were psychosocial. Fifty-three (53 nursing interventions were implemented: 84.9% were physiological in nature, 11.3% behavioral and 3.8% family related. The relationship between the problems identified and the interventions developed were adjusted principally to address the psychobiological needs. Educational interventions were used frequently to attend to the psychosocial needs of the patients.

Effectiveness of the Benign and Malignant Diagnosis of Mediastinal and Hilar Lymph Nodes by Endobronchial Ultrasound Elastography.

Science.gov (United States)

Huang, Haidong; Huang, Zhiang; Wang, Qin; Wang, Xinan; Dong, Yuchao; Zhang, Wei; Zarogoulidis, Paul; Man, Yan-Gao; Schmidt, Wolfgang Hohenforst; Bai, Chong

2017-01-01

Background and Objectives: Endobronchial ultrasound elastography is a new technique for describing the stiffness of tissue during endobronchial ultrasound-guided transbronchial needle aspiration (EBUS-TBNA). The aims of this study were to investigate the diagnostic value of Endobronchial ultrasound (EBUS) elastography for distinguishing the difference between benign and malignant lymph nodes among mediastinal and hilar lymph node. Materials and Methods: From June 2015 to August 2015, 47 patients confirmed of mediastinal and hilar lymph node enlargement through examination of Computed tomography (CT) were enrolled, and a total of 78 lymph nodes were evaluated by endobronchial ultrasound-guided transbronchial needle aspiration (EBUS-TBNA). EBUS-guided elastography of lymph nodes was performed prior to EBUS-TBNA. A convex probe EBUS was used with a new EBUS processor to assess elastographic patterns that were classified based on color distribution as follows: Type 1, predominantly non-blue (green, yellow and red); Type 2, part blue, part non-blue (green, yellow and red); Type 3, predominantly blue. Pathological determination of malignant or benign lymph nodes was used as the gold standard for this study. The elastographic patterns were compared with the final pathologic results from EBUS-TBNA. Results: On pathological evaluation of the lymph nodes, 45 were benign and 33 were malignant. The lymph nodes that were classified as Type 1 on endobronchial ultrasound elastography were benign in 26/27 (96.3%) and malignant in 1/27 (3.7%); for Type 2 lymph nodes, 15/20 (75.0%) were benign and 5/20 (25.0%) were malignant; Type 3 lymph nodes were benign in 4/31 (12.9%) and malignant in 27/31 (87.1%). In classifying Type 1 as 'benign' and Type 3 as 'malignant,' the sensitivity, specificity, positive predictive value, negative predictive value and diagnostic accuracy rates were 96.43%, 86.67%, 87.10%, 96.30%, 91.38%, respectively. Conclusion: EBUS elastography of mediastinal and

Hallazgos clínicos e histomorfológicos en pacientes con esteatosis hepática no alcohólica

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Miriam Teresa Caro Fernández

2014-08-01

Full Text Available Se realizó un estudio observacional y descriptivo de 32 pacientes con esteatosis hepática no alcohólica, diagnosticados en el Hospital Provincial Docente Clinicoquirúrgico "Saturnino Lora Torres" de Santiago de Cuba, de enero de 2011 a junio de 2013, a fin de caracterizarles epidemiológica, clínica e histomorfológicamente. En la investigación se obtuvo un incremento de la esteatosis hepática no alcohólica entre las hepatopatías crónicas, con predominio en personas de los grupos etarios de 35-44 y 45-54 años y del sexo masculino, y una mayor asociación a la hipertrigliceridemia y la hipertransaminasemia; igualmente, la dislipidemia y el sobrepeso -- según índice de masa corporal -- representaron los factores de riesgo más frecuentes en los afectados. No se encontró significación estadística al correlacionar los hallazgos ecográficos con los obtenidos por biopsia, de manera que quedó reafirmado que la laparoscopia constituye el medio de mayor sensibilidad y especificidad para diagnosticar la enfermedad en cuestión

Modelos reológicos aplicados a masas de trigo y maíz

OpenAIRE

Rodriguez Sandoval, Eduardo; Fernández Quintero, Alejandro; Ayala Aponte, Alfredo

2005-01-01

Los modelos reológicos de un alimento procesado permiten simular la respuesta del material a un esfuerzo o deformación aplicada, al igual que predecir el comportamiento del material de acuerdo a su composición y su forma de preparación. Su aplicación se puede llevar a cabo cuando se tienen datos experimentales expresados en unidades fundamentales. Este artículo describe dos modelos reológicos empleados en el estudio de masas de trigo y maíz, el modelo extensional biaxial y el modelo dinámico ...

Modelos reológicos aplicados a masas de trigo y maíz

OpenAIRE

Rodríguez Sandoval, Eduardo; Fernández Quintero, Alejandro; Ayala Aponte, Alfredo

2010-01-01

Los modelos reológicos de un alimento procesado permiten simular la respuesta del material a un esfuerzo o deformación aplicada, al igual que predecir el comportamiento del material de acuerdo a su composición y su forma de preparación. Su aplicación se puede llevar a cabo cuando se tienen datos experimentales expresados en unidades fundamentales. Este artIculo describe dos modelos reológicos empleados en el estudio de masas de trigo y maIz, el modelo extensional biaxial y el modelo dinámico...

Estudio de la biosorción de cromo con hoja de café

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Luis Carlos Florez García

2009-05-01

Full Text Available El objeto de este trabajo es proveer una alternativa para la remoción de metales pesados como el cromo de las aguas residua- les (efluentes de la industria del cuero y de electrorrecubrimientos de piezas metálicas (galvanoplastia, utilizando como bioma- sa hojas de café. A condiciones de operación de pH de la disolución de 4, grado de agitación 0 rpm, tamaño de partícula de la biomasa de 0,149 mm de diámetro y relación masa de biomasa / volumen de disolución de 0,85 gr/ml, se obtuvieron eficien- cias en la remoción de cromo, con la hoja de café variedad castillo, coffee arabica del 82% para disoluciones sintéticas de1.000 mg/L.

Soporte nutricional enteral en pacientes pediátricos con insuficiencia renal crónica en hemodiálisis Enteral nutritional support in pediatric patients with chronic renal failure on hemodialysis

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Susana Pineda Pérez

2006-03-01

Full Text Available Se realizó un estudio clínico con el objetivo de evaluar la aceptabilidad, tolerancia y efecto en el estado nutricional de la nutrición enteral con Nutricomp® ADN renal de B-BRAUN. Se estudiaron 12 pacientes en edades entre los 10 y 19 años, que presentaban insuficiencia renal crónica y recibían tratamiento de hemodiálisis. Además de su alimentación habitual se indicó ADN renal (90 g, por vía oral, en la sesión de diálisis. Se evaluó cada paciente al inicio y se comparó consigo mismo a los 30 días, según parámetros antropométricos, dietéticos, bioquímicos e inmunológicos. Los datos obtenidos se procesaron con el programa SPSS, versión 8, y se emplearon para el análisis las pruebas t de Student y chi cuadrado. La tolerancia y aceptabilidad de la fórmula enteral fueron buenas. A los 30 días se registró un aumento significativo en las variables antropométricas: peso (p < 0,001, índice de masa corporal (p < 0,001 y área grasa (p < 0,001. En el área de músculo el incremento no fue signficativo (p < 0,259. No hubo modificación significativa de las restantes variables. La recuperación nutricional, expresada por el aumento de peso, el índice de masa corporal, el área de grasa y el área muscular, estuvo presente en todos los pacientes estudiados.

Poststernotomy mediastinitis: a classification to initiate and evaluate reconstructive management based on evidence from a structured review

NARCIS (Netherlands)

van Wingerden, Jan J.; Ubbink, Dirk T.; van der Horst, Chantal M. A. M.; de Mol, Bas A. J. M.

2014-01-01

Early recognition and, where possible, avoidance of risk factors that contribute to the development of poststernotomy mediastinitis (PSM) form the basis for successful prevention. Once the presence of PSM is diagnosed, the known risk factors have been shown to have limited influence on management

SÍNTESIS SELECTIVA DE BENZALDEHÍDO USANDO ZEOLITAS MODIFICADAS CON METALES DE TRANSICIÓN

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Clara Saux

2012-01-01

Full Text Available Se estudió la oxidación selectiva de estireno para la obtención de benzaldehído sobre zeolitas ZSM-5 modificadas con diferentes metales de transición (cromo, cobalto, hierro, zinc, manganeso y cobre y utilizando peróxido de hidrógeno como oxidante. Dado que los mejores resultados se obtuvieron utilizando Cr-ZSM-5, estos materiales se estudiaron evaluando el efecto del tiempo de reacción, la masa de catalizador, la relación molar estireno/hidroperóxido, la naturaleza del solvente y la temperatura de reacción. Los mejores resultados de las condiciones evaluadas se obtuvieron trabajando con una relación molar sustrato/oxidante de 0,45 y utilizando acetonitrilo como solvente, dado su carácter aprótico y de mayor polaridad de los solventes evaluados (acetonitrilo, acetona, 2-butanol y 2-propanol. El aumento en la temperatura de reacción mostró un incremento en la conversión de estireno, el cual se desaceleró al superar los 60 oC por descomposición térmica del peróxido de hidrógeno.

Talla, peso, somatotipo y composición corporal en gimnastas de élite españolas (gimnasia rítmica desde la infancia hasta la edad adulta

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Alfredo Irurtia Amigó

2009-03-01

Full Text Available Introducción y objetivos: El objeto del presente estudio fue caracterizar el comportamiento de la talla y el peso, el somatotipo y la composición corporal, a lo largo de la edad, en gimnastas de élite españolas (gimnasia rítmica, y comparar dichos valores con los de la población española de referencia. Método: El diseño del estudio fue retrospectivo, observacional, descriptivo y presentó dos estrategias de agrupación de la muestra: transversal (n=151 y mixta-longitudinal (n = 79. Las variables analizadas fueron: talla, peso, somatotipo (endomorfismo, ectomorfismo, mesomorfismo, y composición corporal (∑6 pliegues, masa grasa, masa muscular, y masa libre de grasa. Resultados: Al no observarse diferencias significativas (p > 0,05 entre la muestra transversal y la mixta-longitudinal en ninguna de las variables analizadas, los resultados de la primera se consideraron como cambios relacionados con la edad. Conclusiones: El grupo de gimnastas de élite, desde los 10 años, presenta valores de talla superiores, e inferiores de peso, en comparación con la población española de referencia. Ambas variables muestran un perfil evolutivo en consonancia con lo observado en otros estudios, con sendos retrasos en el momento de aparición de los picos de crecimiento. Las gimnastas conforman desde las primeras edades un grupo somatotípicamente homogéneo, en el que destaca el componente ectomórfico. No se observan incrementos significativos de los valores de masa grasa y masa muscular a lo largo de la edad. Desde las primeras edades, las características somáticas descritas sugieren un proceso de selección previo.

How to accurately estimate BH masses of AGN with double-peaked emission lines

OpenAIRE

Xue Guang Zhang; Deborah Dultzin; Ting Gui Wang

2008-01-01

Presentamos una nueva relación para determinar la masa virial del Agujero Negro central en Núcleos Activos de Galaxias con perfiles de doble pico en las líneas anchas de baja ionización. Se discute cuál es el parámetro adecuado para estimar la velocidad local de las regiones de emisión y la relación para estimar la distancia de éstas regiones a la fuente de ionización. Seleccionamos 17 objetos con perfiles de doble pico del SDSS y con líneas de absorción medibles para determinar las masas...

False positive diagnosis of malignancy in a case of cryptogenic organising pneumonia presenting as a pulmonary mass with mediastinal nodes detected on fluorodeoxyglucose-positron emission tomography: a case report

Science.gov (United States)

2009-01-01

Introduction We report the case of a patient with positive findings on a lung emission tomography/computed tomography (PET/CT) scan, with possible contra lateral mediastinal involvement, which strongly suggested an inoperable lung carcinoma. The lung mass proved to be a cryptogenic organising pneumonia. While the latter has previously been shown to be PET/CT positive, mediastinal involvement simulating malignant spread has not been previously reported. Case presentation A 50-year-old Caucasian woman presented with a history of unproductive cough and was found to have a mass in the right upper lobe as shown on chest X-ray and a computed tomography scan. A subsequent PET/CT scan showed strong uptake in the right upper lobe (maximum standard uptake values (SUVmax) 9.6) with increased uptake in the adjacent mediastinum and contralateral mediastinal nodes. Surgical resection and mediastinoscopy revealed cryptogenic organising pneumonia, with enlarged reactive mediastinal lymph nodes. Conclusion The case illustrates the limits of PET/CT scanning as a diagnostic tool, and emphasizes the importance of obtaining histological confirmation of malignant diseases whenever possible. PMID:19946541

Left atrial mass 16 years after radiation therapy for mediastinal neuroblastoma

International Nuclear Information System (INIS)

Ensing, G.J.; Driscoll, D.J.; Smithson, W.A.

1987-01-01

Tumors involving the heart during childhood are rare. However, neuroblastoma, a common pediatric malignancy, has been described to involve the cardiovascular system in 3%-12% of patients dying with this tumor. Rarely is such involvement diagnosed ante mortem and never, to our knowledge, has a benign cardiac tumor been reported to present in childhood after successful eradication of neuroblastoma. We describe the identification and surgical resection of a nodular, hypertrophied, calcified, pedunculated left atrial mass in a 16-year-old boy who was complaining of exercise-associated presyncope and headaches 16 years after irradiation and chemotherapy for mediastinal neuroblastoma

Bocio retrotraqueal: presentación de un caso Retrotracheal goiter: a case presentation

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Edelberto Fuentes Valdés

2007-06-01

Full Text Available Los pacientes con bocio localizado en el mediastino posterior deben ser sometidos a resección quirúrgica por la posibilidad de compromiso de los órganos vecinos o de malignidad. Se presenta el caso de un paciente previamente operado por un bocio con probable prolongación endotorácica que fue intervenido pero continuó con manifestaciones de compresión traqueal. Tras una segunda operación fallida, ahora por vía transesternal, fue remitido a nuestro servicio por una estenosis traqueal isquémica. En el estudio preoperatorio se demostró que se mantenía una masa tumoral aproximadamente de 10 cm, retrotraqueal, que comprimía y deformaba la tráquea. Además presentaba osteomielitis del esternón. Fue intervenido mediante toracotomía derecha y se logró extirpar alrededor de 95 % de la masa tumoral. El estudio radiofarmacológico posoperatorio no demostró captación del isótopo en el mediastino. Se hacen consideraciones sobre la indicación de la cirugía y las vías de abordaje utilizadas. Al momento de preparar este manuscrito (6 meses después de la operación el paciente se encuentra bien, en espera del tratamiento definitivo de la estenosis traqueal isquémicaPatients with posterior mediastinal goiter should be subjected to surgical resection because of the possibility of affecting neibouring organs or developing malignacy. This paper presented the case of a patient that had been previously operated from a goiter with possible endothoracic prolongation but continued suffering tracheal compression. After a second failed transternal surgery, he was refered to our service with ischemic tracheal stenosis. The preoperative study showed a 10cm retrotracheal tumoral mass that pressed and distorted the trachea. He also had sternal osteomyelitis. Then, he underwent right thoracotomy and roughly 95% of the mass was removed. The post-surgical radiopharmacological study did not reveal isotope uptake in the mediastinum. Surgery indications and

Reliable and valid assessment of competence in endoscopic ultrasonography and fine-needle aspiration for mediastinal staging of non-small cell lung cancer.

Science.gov (United States)

Konge, L; Vilmann, P; Clementsen, P; Annema, J T; Ringsted, C

2012-10-01

Fine-needle aspiration (FNA) guided by endoscopic ultrasonography (EUS) is important in mediastinal staging of non-small cell lung cancer (NSCLC). Training standards and implementation strategies of this technique are currently under discussion. The aim of this study was to explore the reliability and validity of a newly developed EUS Assessment Tool (EUSAT) designed to measure competence in EUS - FNA for mediastinal staging of NSCLC. A total of 30 patients with proven or suspected NSCLC underwent EUS - FNA for mediastinal staging by three trainees and three experienced physicians. Their performances were assessed prospectively by three experts in EUS under direct observation and again 2 months later in a blinded fashion using digital video-recordings. Based on the assessments, intra-rater reliability, inter-rater reliability, and construct validity were explored. The intra-rater reliability was good (Cronbach's α = 0.80), but comparison of results based on direct observations and blinded video-recordings indicated a significant bias favoring consultants (P = 0.022). Inter-rater reliability was very good (Cronbach's α = 0.93). However, one rater assessing five procedures or two raters each assessing four procedures were necessary to secure a generalizability coefficient of 0.80. The assessment tool demonstrated construct validity by discriminating between trainees and experienced physicians (P = 0.034). Competency in mediastinal staging of NSCLC using EUS and EUS - FNA can be assessed in a reliable and valid way using the EUSAT assessment tool. Measuring and defining competency and training requirements could improve EUS quality and benefit patient care. © Georg Thieme Verlag KG Stuttgart · New York.

Extracción y reología de Betaglucanos de cebada y elaboración de masas de pan sin gluten enriquecidas con los extractos

OpenAIRE

Rivero Hernández, Miguel

2012-01-01

La materia prima utilizada ha sido la cebada H13 tipo waxy, una cebada desnuda, es decir sin cáscara, con un contenido de beta-glucanos del 4,51%, de la que se obtuvieron tres extractos distintos: el primero procedente de la harina integral de la cebada (18,8 % de -glucanos), el segundo de esa misma harina integral tratada con etanol para inactivar las betaglucanasas (21,5 % de -glucanos), y el tercero procedente de la fracción gruesa de la molienda pretratada igualmente con ...

Alteraciones electrocardiográficas y factores de riesgo cardiovascular en pacientes con diabetes tipo 2

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Rodríguez-Morán Martha

1999-01-01

Full Text Available Objetivo. Determinar cuáles son las alteraciones del ritmo y la conducción cardiaca más frecuentes en pacientes con diabetes tipo 2 sin cardiopatía previa y establecer su asociación con los factores de riesgo cardiovascular. Material y métodos. Se incluyeron pacientes con diabetes tipo 2 sin presencia o antecedentes de cardiopatía. Se determinaron los factores de riesgo cardiovascular, el índice de masa corporal y los niveles séricos de glucosa, colesterol y triglicéridos. Se registró electrocardiograma convencional en reposo. La asociación de las variables en estudio con la ocurrencia de arritmias se calculó con un modelo de análisis multivariado ajustado por sexo. Resultados. Se integraron 199 pacientes: 113 mujeres (56.8% y 86 hombres (43.2%, y se identificó algún tipo de alteración electrocardiográfica en 29.1% de los sujetos. El hemibloqueo fascicular anterior (HFA y el bloqueo completo de rama derecha del Haz de His (BRDHH, constituyeron 75.9% de las alteraciones identificadas. Los pacientes con trastornos del ritmo y la conducción tienen niveles más elevados de colesterol y triglicéridos. La aparición de arritmias se relaciona directamente con el incremento de la edad (r= 0.75, p= 0.01. En el análisis multivariado ajustado por sexo la hipercolesterolemia y la edad se asociaron significativamente con las alteraciones del ritmo y la conducción: RM 1.5, IC95% 1.1-4.6, p< 0.05 y RM 1.3, IC95% 1.0-5.2, p< 0.05, respectivamente. Conclusiones. Las alteraciones del ritmo y la conducción cardiaca más frecuentes en la diabetes tipo 2 son el HFA y el BRDHH; la hipercolesterolemia y la edad son los factores asociados a su presencia.

Modelación y simulación del tanque de contacto y los enfriadores de licor en el proceso de lixiviación carbonato-amoniacal con minerales lateríticos cubanos

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Angel O. Columbié-Navarro

2000-03-01

Full Text Available El presente trabajo muestra los resultados obtenidos por los autores en la investigación y análisis del modelo matemático del tanque de contacto y los enfriadores de licor en el proceso de lixiviación carbonato-amoniacal con minerales lateríticos cubanos, para su regulación automática. Se realiza un análisis de las principales variables que intervienen en el proceso ( en el tanque para el proceso de mezclado y en los enfriadores para el licor. Se propone un modelo matemático dinámico para el tanque de contacto y los enfriadores de licor con balances de masa y energía, expresando todas las dependencias dinámicas en ecuaciones diferenciales no lineales a parámetros concentrados. Se incluye además la simulación con datos reales de la planta.

Factor de necrosis tumoral alfa en una población infanto-juvenil con sobrepeso

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Teresita del R. Carrizo

2013-08-01

Full Text Available El sobrepeso infantil está asociado a sobrepeso/obesidad en la edad adulta. El tejido adiposo en obesos produce una cantidad incrementada de citoquinas proinflamatorias como el factor de necrosis tumoral alfa (TNF-a, ejerciendo un efecto deletéreo sobre la función vascular. El objetivo de este trabajo fue evaluar niveles de TNF-a en una población infantojuvenil con sobrepeso y su relación con otras variables. Se estudiaron 30 niños con sobrepeso (12 varones de edades entre 8-13 años, se midió circunferencia de cintura (CC e índice de masa corporal (IMC y fueron comparados con 20 controles de edad y sexo semejantes. Se consideró criterio de inclusión un IMC = 85 < 95 percentilo para edad y sexo. En ambos grupos se determinó: glucemia en ayunas (método glucosa oxidasa, insulina plasmática (ECLIA, fibrinógeno (Fg, método de Clauss, proteína C reactiva ultrasensible (uPCR, método inmunoturbidimétrico, TNF-a (ELISA, perfil lipídico (métodos enzimáticos, eritrosedimentación y se calculó el índice HOMA. Los datos se expresaron como mediana y rango intercuartil y con el coeficiente de Spearman se investigaron las correlaciones entre variables, considerándose significativo un p < 0.05. Los niveles de TNF-a fueron mayores en los sujetos con sobrepeso [15.4 (13.2-24.0 vs. 12.7 (11.2-14.8 pg/ml; p = 0.028]. También resultaron más elevados los valores de Fg, insulina plasmática, índice HOMA, uPCR y triglicéridos. El TNF-a se correlacionó con la CC (r = 0.654; p = 0.021. Los niveles elevados de TNF-a, uPCR y Fg encontrados confirman un estado proinflamatorio asociado a obesidad abdominal en la población estudiada.

Estudio cinético de la reacción del CO con el O2 sobre un catalizador de Pd en alto vacío

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Luis M. Carballo Suárez

1988-01-01

Full Text Available La oxidación del monóxido de carbono con el oxígeno sobre una banda de Paladio policristalino bajo condiciones de estado estacionario se investigó con la ayuda de un espectrómetro de masas y con la utilización de monóxido de carbono marcado isotópicamente 13CO. A temperaturas entre 500 y 750 K se varía la proporción de las presiones parciales de los reactantes entre los límites 0,01 hasta 100, y la presión total en el reactor está siempre por debajo de 10-3 mbar. Los resultados experimentales se describen usando una secuencia de pasos elementales que incluye la adsorción y desorción molecular de los reactantes, y la reacción de las dos especies adsorbidas para formar CO2, siendo este último el paso controlante de la reacción. El modelo considera dos clases diferentes de sitios activos. Los cálculos basados sobre valores de los parámetros tomados de la literatura muestran un ajuste aproximado con los datos experimentales.

Sandra Patricia Rodríguez Ávila. Sujeción, corrección y disciplina: pedagogía social de masas en Santa Fe de Bogotá 1780-1821

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Juan Carlos Villamizar

2008-01-01

Full Text Available El libro ganador del vii Premio Nacional de Educación Francisca Radke, versión 2005-2006, se compone de una introducción y tres capítulos, en los que la autora se ocupa de las prácticas de sujeción, corrección y disciplina a finales del siglo xviii y comienzos del xix, en que la administración colonial llegó a su fin en América. Los dos primeros capítulos abordan la problemática de la pobreza y las propuestas de cómo tratarla. El tercer capítulo se ocupa de la pedagogía social de masas y de la asistencia, enseñanza y corrección de pobres, mendigos, vagos y malentretenidos en Santa Fe de Bogotá entre 1780 y 1820. A diferencia de los dos primeros capítulos, este último está construido estrictamente con fuentes primarias.

A randomized trial of early versus delayed mediastinal drain removal after cardiac surgery using silastic and conventional tubes

Science.gov (United States)

Moss, Emmanuel; Miller, Corey S.; Jensen, Henrik; Basmadjian, Arsène; Bouchard, Denis; Carrier, Michel; Perrault, Louis P.; Cartier, Raymond; Pellerin, Michel; Demers, Philippe

2013-01-01

OBJECTIVES Mediastinal drainage following cardiac surgery with traditional large-bore plastic tubes can be painful and cumbersome. This study was designed to determine whether prolonged drainage (5 days) with a silastic tube decreased the incidence of significant pericardial effusion and tamponade following aortic or valvular surgery. METHODS One hundred and fifty patients undergoing valvular or aortic surgery in a tertiary cardiac surgery institution were randomized to receive a conventional mediastinal tube plus a silastic Blake drain (n = 75), or two conventional tubes (n = 75). Conventional drains were removed on postoperative day (POD) 1, while Blake drains were removed on POD 5. The primary end-point was the combined incidence of significant pericardial effusion (≥15 mm) or tamponade through POD 5. Secondary end-points included total mediastinal drainage, postoperative atrial fibrillation (AF) and pain. RESULTS Analysis was performed for 67 patients in the Blake group and 73 in the conventional group. There was no difference between the two groups in the combined end-point of significant effusion or tamponade (7.4 vs 8.3%, P = 0.74), or in the incidence of AF (47 vs 46%, P = 0.89). Mean 24-h drainage was greater in the Blake group than in the conventional group (749 ± 444 ml vs 645 ± 618 ml, P tubes is safe and does not increase postoperative pain. There was no difference between the Blake and conventional drains with regard to significant pericardial effusion or tamponade in this cohort; however, this conclusion is limited by the low overall incidence of the primary outcome in this cohort. PMID:23575759

Relación masa-radio para estrellas enanas blancas y la interpretación de recientes mediciones hechas por Hipparcos

Science.gov (United States)

Panei, J. A.; Althaus, L. G.; Benvenuto, O. G.

Recientes mediciones de la masa y el radio hechas por Hipparcos de las estrellas enanas blancas 40 Eri B y Procyon B (Shipman, H. & Provencal, J. - ApJ. 1998, 494, 759), sugieren un núcleo compuesto de hierro para dichas estrellas, en lugar de carbono y oxígeno como predice la teoría standard de evolución estelar. Para interpretar estas observaciones, presentamos aquí, relaciones masa-radio para configuraciones degeneradas a temperatura finita para distintas composiciones químicas centrales. Para tal fin hemos calculado secuencias evolutivas de enanas blancas utilizando el código de evolución estelar, desarrollado en el Observatorio de La Plata. Dicho código resuelve las ecuaciones de estructura y evolución estelar mediante la técnica de relajación de Henyey, y esta basado en una descripción física muy detallada y actualizada.

Interobserver variability in the detection of mediastinal and hilar lymph nodes on CT in children with suspected pulmonary tuberculosis

International Nuclear Information System (INIS)

Andronikou, Savvas; Brauer, Barbara; Brachmeyer, Steven; Lucas, Susan; Joseph, Elaine; Galpin, Jackie; DuToit, George; Swingler, George

2005-01-01

The presence of mediastinal or hilar adenopathy is critical for the diagnosis of pulmonary TB. Interobserver variability in the detection of lymphadenopathy on CT in children affects the usefulness of CT as a gold standard. To determine the interobserver variability for the detection of hilar and mediastinal adenopathy on CT in children. One hundred children with clinically suspected pulmonary TB were prospectively recruited for CT scanning of the chest. Four observers reviewed the scans independently for the presence of lymphadenopathy at predetermined sites. Overall Kappa statistic was determined for each recognised site of mediastinal and hilar lymphadenopathy. Kappa statistics showed that observers only agreed moderately in their detection of lymphadenopathy. The site of best agreement was the right hilum followed by the subcarinal, right paratracheal and precarinal locations. Observers differed most at the anterior mediastinum and left hilum. The best Kappa statistic was for the overall presence of lymphadenopathy taking all sites into account. Imaging techniques that are considered the gold standard for particular diseases must be validated pathologically, and if this is not possible, interobserver variability should be evaluated. CT is considered the gold standard for detecting lymphadenopathy, but we have shown only moderate agreement between readers. Readers had difficulty in distinguishing lymphadenopathy from normal thymus and were unable to distinguish normal from pathological nodes without a predetermined size threshold for abnormality. The right hilum and the sites around the carina are the most reliable for the reported presence of lymphadenopathy. (orig.)

Estudio experimental sobre el comportamiento térmico de un nuevo tipo de techo-estanque para el enfriamiento pasivo en clima húmedo

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Eduardo Manuel González-Cruz

Full Text Available En este trabajo, una nueva tipología de techo-estanque metálico, basado en el enfriamiento evaporativo indirecto, que incluye masa térmica confinada, se evalúa experimentalmente. Cinco sistemas de enfriamiento pasivo se han estudiado con este dispositivo experimental. Se analizan sus temperaturas características con el propósito de determinar en cada caso, su potencial de enfriamiento, así como, la influencia de la masa térmica en su comportamiento térmico. Entre las técnicas de enfriamiento pasivo aplicadas se encuentran el enfriamiento evaporativo indirecto (EEI y el enfriamiento radiativo nocturno (ER. El sistema donde se combina masa térmica con enfriamiento evaporativo indirecto en el dispositivo experimental presenta una elevada eficiencia de enfriamiento; su valor aumenta a medida que las condiciones son más extremas. Un potencial de enfriamiento aun mayor se consigue al agregar al sistema anterior enfriamiento radiativo.

Parafuso de massa lateral do atlas para fixação da coluna cervical superior: resultados cirúrgicos Tornillos de masa lateral del atlas para la fijación de la columna cervical superior: resultados quirúrgicos Lateral mass screws of the atlas for upper cervical spine fixation: surgical results

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Enrico Ghizoni

2011-01-01

Full Text Available OBJETIVO: Apresentar os resultados cirúrgicos de uma série de casos de estabilização da coluna cervical superior com o uso de parafusos de massa lateral do atlas. MÉTODOS: Avaliação retrospectiva dos resultados cirúrgicos de pacientes submetidos à estabilização da coluna cervical superior com o uso de parafusos de massa lateral do atlas. RESULTADOS: Seis pacientes foram operados durante o período de janeiro de 2009 a abril de 2010, quatro homens e duas mulheres. Não houve morbidade permanente ou morbidade nessa série de casos. A principal causa de instabilidade atlanto-axial foi trauma e houve apenas um caso de fratura patológica do odontoide por metástase de próstata. A fixação do áxis foi obtida com o uso de três diferentes técnicas de parafusos (pars, pedicular e de lâmina, com igual distribuição entre os pacientes. CONCLUSÃO: O uso de parafusos na massa lateral do atlas é uma importante técnica para se obter estabilidade e fusão na coluna cervical superior, e com o conhecimento da anatomia e da técnica cirúrgica, bons resultados podem ser atingidos.OBJETIVOS: presentar los resultados quirúrgicos de una serie de casos de estabilización con el uso de tornillos de masa lateral del atlas. MÉTODOS: evaluación retrospectiva de los resultados quirúrgicos de los pacientes sometidos a estabilización de la columna cervical superior con el uso de tornillos de masa lateral del atlas. RESULTADOS: Seis pacientes operados entre enero 2009 y abril 2010, siendo cuatro hombres y dos mujeres. No hubo mortalidad o morbilidad grave en esta serie. La principal causa de inestabilidad atlantoaxial fue traumática con apenas un caso de fractura patológica del odontoide por una metástasis de tumor de próstata. Fijación del axis fue alcanzada con el uso de tres diferentes técnicas (pars, pedicular, laminar, con dos casos cada una. Conclusión: el uso de tornillos de masa lateral en el atlas es una importante técnica para

Estilo de vida e índice de masa corporal de una población de adultos del sur de Tamaulipas, México

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Eunice Reséndiz

2010-01-01

Full Text Available La obesidad es una enfermedad multifactorial que involucra aspectos genéticos y ambientales. Objetivo: valorar la influencia del estilo de vida en el índice de masa corporal de una población de adultos. Método: este estudio descriptivo transversal se deriva del proyecto "Hábitos alimentarios y composición corporal (IMC de adultos con sobrepeso y obesidad"; cuya fase de recolección se realizó entre enero y julio de 2009; preliminarmente se presentan resultados relativos al estilo de vida. Se aplicó una cédula de datos personales y se realizaron mediciones antropométricas. Para el análisis estadístico se utilizaron medidas de tendencia central y se construyeron modelos de regresión lineal múltiple. Resultados: las mayores proporciones tanto del grupo de hombres como del de mujeres, señalaron no fumar, ni realizar algún deporte o ejercicio. En el caso del consumo de alcohol, la mayor proporción del grupo de hombres dijo consumirlo. Los modelos de regresión mostraron que en el total del grupo, así como en el grupo de mujeres, las variables tabaco y ejercicio influyeron en el IMC de los participantes, ya que tuvieron efecto en el modelo de regresión. Dichas variables se correlacionaron significativa e inversamente con el IMC, lo que particularmente llamó la atención en el caso del tabaco. Discusión: el estudio muestra que el estilo de vida influye de manera importante en el IMC de esta población de adultos.

Influencia de un patrón de dieta mediterránea en la distribución de la grasa corporal en pacientes canarios con riesgo cardiovascular

OpenAIRE

Álvarez-Pérez, J.

2013-01-01

Programa de doctorado: Salud pública (epidemilogía, planificación y nutrición) [ES] La dieta Mediterránea (DMed) es considerada como uno de los patrones dietéticos más saludables, debido a su relación con una baja morbilidad y mortalidad para algunas enfermedades crónicas. El ojetivo es analizar el efecto de tres intervenciones dietéticas: un patrón de Dieta Mediterránea en los parámetros antropométricos: peso, Índice da Masa Corporal (IMC), y circunferencia de la cintura (CC), y en la com...

Proceso de mezcla vertical en las masas de agua de la cuenca del pacífico colombiano y comportamiento anual de sus características termohalinas

OpenAIRE

Villegas Bolaños, Nancy Liliana; Málikov, Igor

2011-01-01

La investigación se basó en 5 masas de agua identificadas previamente en la columna vertical de la Cuenca del Pacífico Colombiano (CPC): Agua superficial colombiana ecuatorial tropical; Agua central superior ecuatorial del Pacífico; Agua intermedia antártica; Agua antártica de fondo o circumpolar y Agua profunda del Pacífico. Por medio del análisis realizado, se identificó el aporte de las masas de agua en el proceso de mezcla vertical en los transeptos 2 y 4ºN, se describió el desplazamiento...

Estudio comparativo entre la densidad radiológica mediante tomografía computerizada de haz cónico y el metabolismo óseo de los maxilares en pacientes con y sin osteoporosis

OpenAIRE

Farré Pagès, Núria

2017-01-01

La osteoporosis se define como un trastorno esquelético sistémico. El individuo presenta una masa ósea baja con deterioro de la microarquitectura del tejido óseo, tanto trabecular como cortical, derivando en fragilidad ósea susceptible de fracturas. A nivel del metabolismo óseo, presenta una actividad osteoblástica y osteoclástica alterada. Esta patología se ve influenciada por factores como la edad, el tabaco, la alimentación, alteraciones hormonales, el uso de ciertos medicamentos, o exceso...

Analysis of volatile compounds in breads and related products: Improvement of gluten-free breads aroma

OpenAIRE

Pico Carbajo, Joana

2018-01-01

Inicialmente se desarrolló una metodología de extracción con disolvente y se comparó con la metodología SAFE. Posteriormente se hicieron estudios del tiempo máximo de congelación de las muestras y de inhibición de la fermentación residual para el aroma de masas de pan. Se continuó con la evolución del perfil aromático desde la masa hasta la miga de panes sin gluten. A continuación se analizaron migas de panes sin gluten por SHS-GC/MS y DHS-GC/MS, concluyéndose que mezclas de harina de quinoa ...

Mediastinal nonleukemic granulocytic sarcoma with cardiac infiltration Sarcoma granulocítico mediastinal não associado à leucemia com infiltração cardíaca

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Gabrielle G. Lima

2008-08-01

Full Text Available We report on a case of mediastinal granulocytic sarcoma with cardiac infiltration in a young man with no evidence of leukemia involving the bone marrow or peripheral blood. Diagnosis was accomplished by immuno-histochemistry with expressions of myeloperoxidase and CD99 antigens. The patient achieved clinical remission, but evolved with febrile neutropenia during chemotherapy and died. Although subclinical cardiac infiltrations are commonly found at autopsy in patients with acute non-lymphoblastic leukemia, only one case of involvement of the heart with granulocytic sarcoma in the absence of bone marrow disease has been published in the literature. A diagnosis of granulocytic sarcoma should not be excluded when the biopsy of the bone marrow does not show any evidence of leukemic infiltration.Relata-se o caso de um adulto jovem com sarcoma granulocítico (SG mediastinal com infiltração cardíaca sem evidência de leucemia envolvendo medula óssea ou sangue periférico. O diagnóstico foi revelado pela imuno-histoquímica com positividade para mieloperoxidase e CD99. O paciente apresentou remissão clínica, porém evoluiu com neutropenia febril durante a quimioterapia e foi a óbito. Embora infiltrados cardíacos subclínicos sejam comumente detectados na autópsia em pacientes com leucemia aguda nãolinfoblástica, somente um caso de SG com envolvimento cardíaco na ausência de doença na medula óssea foi descrito na literatura. Um diagnóstico de SG não deve ser excluída quando a biópsia da medula óssea não mostrar nenhuma evidência de infiltração leucêmica.

Hubungan Asupan Zat Gizi dan Indeks Masa Tubuh dengan Hiperlipidemia pada Murid SLTP yang Obesitas di Yogyakarta

OpenAIRE

Siti Nurul Hidayati; Hamam Hadi; W. Lestariana

2016-01-01

Latar belakang. Obesitas pada anak dan remaja meningkatkan risiko penyakit degeneratif dan kardiovaskular. Namun belum jelas apakah remaja yang obesitas berisiko mengalami hiperlipidemia Tujuan. Menilai hubungan antara indeks masa tubuh (IMT), asupan karbohidrat dan lemak dengan hiperlipidemia pada murid SLTP yang obesitas. Metoda. Penelitian cross sectional di Yogyakarta. Sampel 109 murid SLTP dengan IMT = persentile-95 kurve IMT dari NCHS-CDC, dipilih secara acak dari muri...

Mediastinal mixed germ cell tumor in an infertile male with Klinefelter syndrome:A case report and literature review

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Dinesh Pradhan

2015-01-01

Full Text Available Klinefelter syndrome (KS is a well-documented abnormality of the sex chromosome, with an incidence of 1 in 600 newborn males. It is characterized by a 47, XXY or a mosaic karyotype, hypergonadotrophic hypogonadism, infertility, reduced body hair, gynecomastia, and tall stature. Different neoplasms such as breast, testicular, and lymphoreticular malignancies may occur in 1% to2% of the cases with KS. Herein we describe a case of mediastinal mixed germ cell tumor (GCT in a 40-year-old male with KS. Interestingly, this case also had mitral valve prolapse, and an incidental papillary microcarcinoma of the thyroid gland. In view of the presence of pulmonary nodules, antemortem differential diagnoses considered were mycobacterial infection, lymphoma, thymic carcinoma, and a primary/metastatic neoplasm of the lung. As GCT was not considered, the serum markers of a GCT were not performed. The diagnosis of this rare mediastinal mixed GCT with KS was made at autopsy.

Recurrent Pneumonia due to Fibrosing Mediastinitis in a Teenage Girl: A Case Report with Long-Term Follow-Up

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Avigdor Hevroni

2018-01-01

Full Text Available A teenage girl was evaluated for recurrent right pneumonia. The evaluation revealed a calcified mediastinal mass that compressed the right intermediate and middle lobar bronchi, as well as the right pulmonary artery and veins. The clinical picture together with imaging studies and borderline positive serology testing suggested a diagnosis of fibrosing mediastinitis associated with histoplasmosis. This rare condition is characterized by the local proliferation of invasive fibrous tissue within the mediastinum due to a hyperimmune reaction to Histoplasma capsulatum. Antifungal and anti-inflammatory therapies are usually ineffective, and surgical intervention contains a high morbidity risk. Palliative surgery and stenting of the compressed airway have been suggested. In the past, the prognosis was thought to be poor, but recent studies demonstrate a more positive outcome. Our patient had been radiologically and functionally stable under follow-up for over thirteen years and has married and delivered two healthy children, both following an uneventful pregnancy.

RELAÇÃO ENTRE ÍNDICE DE MASSA CORPORAL E DESEMPENHO MOTOR DE IDOSOS PERTENCENTES A GRUPOS DE CONVIVÊNCIA

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Thalita Andrade Oliveira

2016-01-01

Full Text Available El estudio objetivó verificar la relación entre el indice de masa corporal y el rendimiento motor de ancianos que participan de un grupo de convivencia. Se trata de una investigación de tipo analítica con diseño transversal y enfoque cuantitativo. El contexto de estudio fue un grupo de convivencia de ancianos, en la ciudad de Vitória da Conquista-BA, (Brasil con una muestra de 82 ancianos. Con la aplicación de la prueba de Chi-cuadrado, se constató una diferencia estadísticamente significativa entre las variables indice de masa corporal (más de 27 kg/m2 y limitación de equilibrio (p-valor= 0,008, y entre indice de masa corporal (más de 27 kg/m2 y limitación de la actividad de agacharse y recoger un lápiz del suelo (p-valor=0,004. En esta perspectiva, en el presente estudio, se verificó que el indice de masa corporal (más de 27 kg/m2 afecta negativamente las actividades de equilibrio y de agacharse y recoger un lápiz en el suelo entre los ancianos evaluados.

Tumores malignos del mediastino en niños: un problema clínico urgente

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Iliana De los Reyes

2010-05-01

Full Text Available Los tumores de mediastino conforman un grupo heterogéneo de enfermedades. La localización de la masa se relaciona con las características clínicas y la aparición de complicaciones. Las masas malignas del mediastino anterior más frecuentes en niños son las neoplasias de precursores linfoides tipo leucemia/linfoma linfoblástico T, el linfoma de Hodgkin y los tumores germinales. El manejo de la urgencia oncológica producida por el efecto compresivo de la masa requiere una evaluación exhaustiva y una rápida intervención, que permita salvaguardar la vida del paciente sin sacrificar el tratamiento óptimo posterior. El síndrome de la vena cava superior, el taponamiento cardiaco y otros hacen parte de las urgencias mecánicas más frecuentes.Se presenta el caso de un niño de ocho años de edad con síntomas respiratorios y presencia de masa en el mediastino anterior, confirmada por citometría de flujo como linfoma linfoblástico, que requirió manejo con esteroides y quimioterapia para citorreducción y mejoría de las complicaciones.

Radiotherapy of lung cancer: Any room left for elective mediastinal irradiation in 2011?; Radiotherapie des cancers bronchiques: place de l'irradiation mediastinale prophylactique en 2011

Energy Technology Data Exchange (ETDEWEB)

Van Houtte, P.; Roelandts, M. [Departement de radiotherapie-oncologie, institut Jules-Bordet, 121, boulevard de Waterloo, 1000 Bruxelles (Belgium); Faculte de medecine, universite libre de Bruxelles, campus erasme, route de Lennik 808, 1070 Bruxelles (Belgium); Mornex, F. [Departement de radiotherapie-oncologie, centre hospitalier Lyon-Sud, chemin du Grand-Revoyet, 69310 Pierre-Benite (France); EA3738, universite Claude-Bernard Lyon-1, domaine Rockefeller, 8, avenue Rockefeller, 69373 Lyon cedex 08 (France)

2011-10-15

Traditionally, the target volumes of curative-intent radiotherapy for non-small cell lung cancer include all uninvolved mediastinal nodes. However, an improvement in tumour control requires an increase of the total dose to the macroscopic target volume. This is only achievable if the irradiation of the organs at risk is reduced, i.e. elective irradiation of the mediastinum is omitted. The available data suggest that elective mediastinal irradiation may be safely omitted, provided that an adequate staging procedure, including FDG PET-CT, has been performed. (authors)

Dimetilarginina asimétrica plasmática en mujeres obesas y no obesas con síndrome de ovarios poliquísticos

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Jorly Mejia Montilla

2016-12-01

Full Text Available OBJETIVO: Determinar las concentraciones plasmáticas de factor de dimetilarginina asimétrica (ADMA en mujeres obesas y no obesas con diagnóstico de síndrome de ovarios poliquísticos (SOPQ. MÉTODOS: Se realizó un estudio de casos y controles en mujeres con diagnóstico de SOPQ y controles sanas de edades similares, con menstruaciones regulares y ovarios normales por ecografía y fueron divididas en cuatro grupos (grupo A: SOPQ obesas; grupo B: SOPQ no obesas; grupo C: controles obesas y grupo D controles no obesas de acuerdo al índice de masa corporal (obesas > 30 Kg/m2 y no obesas < 25 kg/m2. Se midieron las concentraciones de hormonas sexuales, globulina fijadora de hormonas sexuales, glucosa sérica, insulina y ADMA. RESULTADOS: Las mujeres con SOPQ obesas y no obesas presentaron concentraciones más elevadas de hormonas sexuales e insulina comparadas con el grupo control de obesas y no obesas (p < 0,0001. Se observó que las mujeres con SOPQ presentaron concentraciones significativamente más altas de ADMA (grupo A: 0,56 +/- 0,05 picomol/L y grupo B: 0,51 +/- 0,03 picomol/L comparado con los controles (grupo C: 0,47 +/- 0,02 picomol/L y grupo D 0,45 +/- 0,04 picomol/L; p < 0,0001. Se observó que las concentraciones de ADMA presentaban correlación positiva y significativa con los valores de glicemia e insulina en ayunas en las mujeres con SOPQ (p < 0,0001. CONCLUSIÓN: Existen diferencias significativas en las concentraciones plasmáticas del ADMA entre las mujeres con SOPQ obesas y no obesas respecto a los controles normales.

Los movimientos sociales: ¿la nueva masa psicológica?. (Social Movements: the New Psychological Mass?.

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María Fernanda Rodríguez

2016-07-01

Full Text Available Resumen Freud parece explicar el comportamiento psicológico de las masas organizadas a partir de los procesos anímicos de la psique individual. Bajo las consideraciones freudianas y a la luz de ciertas apreciaciones lacanianas, el presente trabajo, resultado de la una investigación de tesis de grado de la maestría en Psicoanálisis, subjetividad y Cultura de la Universidad Nacional, caracterizará una nueva formación colectiva que se ha venido gestando desde la década de los 80 y que parece diferenciarse radicalmente la masa psicológica freudiana. Se trata de los Movimientos Sociales, denominados así por los sociólogos y estudiosos de la psicología colectiva más recientes. Ésta nueva formación colectiva a primera vista parece poner en tela de juicio las apreciaciones freudianas sobre la psicología de las masas, o al menos demandar una nueva consideración de las mismas desde los aportes psicoanalíticos. Palabras clave: lazo social, psicología, masa, psicoanálisis, Movimiento Social. Abstract Freud seems to explain the psychological behavior of the organized masses from the mental processes of the individual psyche. Under the Freudian considerations and in light of certain Lacanian findings, the present research work, the result of an investigation thesis of the Master's Degree in Psychoanalysis, Subjectivity, and Culture at the National University of Colombia, will characterize a new collective formation that has been growing from the 1980s and that seems to be radically different from the Freudian psychological mass. This is the Social Movements, so called by the most recent sociologists and scholars of collective psychology. This new collective formation appears to call into question the Freudian insights on group psychology, or it demands at least a new consideration of masses from the psychoanalytic contributions. Keywords: social bond, psychology, mass, psychoanalysis, Social Movement. Résumé Freud semble expliquer le

Componente del insaponificable del aceite de oliva con polaridad comprendida entre el escualeno y los alcoholes triterpénicos

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Lanzón, A.

1992-10-01

Full Text Available In the unsaponifiable matter of refined olive oils and, frequently, virgin olive oils of bad quality, a new compound with polarity between those of squalene and triterpenic alcohols was isolated. Mass spectrometry of this compound and of their hydrogenated and; sililated derivatives, demonstrated that the compound was a long chain alcohol having 426 of molecular weight, polyisoprenic structure similar to that of squalene, and the hydroxyl group attached at the C-2 carbon atom.

Se ha estudiado y determinado la estructura de un compuesto, de polaridad comprendida entre el escualeno y los alcoholes triterpénicos, que se encuentra en el insaponificable de los aceites de oliva refinados y en muchas ocasiones en el de los vírgenes, sobre todo en los de baja calidad. La espectrometría de masas del mismo y, de sus derivados hidrogenado y sililado, ha puesto de manifiesto que se trata de un alcohol triterpénico lineal, de peso molecular 426, con el esqueleto similar al del escualeno y con el grupo hidroxilo en posición 2.

Role of preoperative PET-CT in assessing mediastinal and hilar lymph node status in early stage lung cancer

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Wei-Yang Lin

2012-05-01

Conclusion: Integrated PET-CT is a useful tool for predicting the negativity of mediastinal LN status pre-operatively in clinically early stage (Stages I and II lung cancer but may be relatively inaccurate in predicting hilar LN status and largely confounded by false positives caused by inflammatory process.

Comparison of systematic mediastinal lymph node dissection versus systematic sampling for lung cancer staging and completeness of surgery.

Science.gov (United States)

Wu, Nan; Yan, Shi; Lv, Chao; Feng, Yuan; Wang, Yuzhao; Zhang, Lijian; Yang, Yue

2011-12-01

This self-controlled prospective study was designed to investigate the efficacy of systematic sampling (SS), compared with systematic mediastinal lymph node dissection (SMLD), for pathologic staging and completeness of surgery. Over a period of 11 mo, 110 patients with lung cancer were enlisted and treated by pulmonary resection. Surgeons systematically sampled mediastinal lymph nodes prior to pulmonary resection, and after pulmonary resection SMLD was performed to each patient using Mountain's procedure [1]. After SMLD, pN status was classified as N0 in 57 cases, N1 in 27, and N2 in 26. SS detected 38.3% of pooled nodes and 37.6% of pooled positive nodes collected from SMLD. Pathologic diagnosis after SS was understaged in nine cases (8.2%) compared with staging after SMLD. However, surgery was incomplete in 24 cases (21.8%) if SMLD was not performed after sampling. Negative predictive value for SS was 86.8% on the right side, and 95.0% on the left. Three categories were generated according to pN status: negative nodes in SS and additional negative nodes from SMLD [S(-)D(-)], negative nodes in SS but additional positive nodes from SMLD [S(-)D(+)], and positive nodes in SS [S(+)D(+)]. cN2 (P=0.000) and CEA level (P=0.001) were correlated with pN status. There was significant overall survival difference between non-N2 group and N2 group (P=0.002). SMLD may harvest about three times of mediastinal lymph nodes compared with SS. SS is more likely to affect the completeness of surgery instead of underrating pathologic stage. Copyright © 2011 Elsevier Inc. All rights reserved.

Estequiometría y ley de conservación de la masa: una relación a analizar desde la perspectiva de los lenguajes químicos

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Lydia Galagovsky

2015-03-01

Full Text Available El presente trabajo se centra en el análisis de la formulación de problemas de estequiometría en diferentes lenguajes químicos que involucran también dibujos con partículas para describir los estados inicial y final de sistemas reaccionantes. El análisis permite tomar conciencia sobre las peculiares restricciones de expresión de algunos de estos lenguajes químicos, así como vislumbrar un problema epistemológico en relación a la aplicación de la ley de conservación de la masa cuando se analizan formatos sintácticos referidos al tema de estequiometría. Concluimos que la enseñanza de los conceptos abstractos y explicaciones químicas fundamentadas en modelos requieren por parte de los docentes una revisión epistemológica sobre sus lenguajes. Esto permitió reflexionar sobre qué decimos y qué queremos significar cuando "hablamos química" y cuando evaluamos a nuestros estudiantes.

Influencia de la poda en el desarrollo de masas de Pinus radiata D. Don y Pinus pinaster Aiton en Asturias

OpenAIRE

Hevia Cabal, Andrea

2013-01-01

Esta tesis evaluó la influencia de diferentes intensidades de poda sobre el crecimiento, desarrollo y persistencia de masas regulares jóvenes de Pinus radiata D. Don y Pinus pinaster Aiton en Asturias, dentro de una selvicultura sostenible enfocada a la producción de madera de calidad.

Multiple Ascending Aortic Mural Thrombi and Acute Necrotizing Mediastinitis Secondary to Acute Pancreatitis

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Byung Kwon Chong

2016-10-01

Full Text Available The formation of aortic thrombi is an extremely rare complication of acute pancreatitis. Here we report a case of acute pancreatitis complicated by a paraesophageal pseudocyst, necrotizing mediastinitis, and the formation of multiple thrombi in the ascending aorta. The patient was successfully treated by surgical therapy, which included extensive debridement of the mediastinum and removal of the aortic thrombi under cardiopulmonary bypass. Although esophageal resection was not carried out concomitantly, the lesions were resolved and the patient remained free of complications over 2 years of follow-up care.

Obesidad en escolares de comunidades rurales con alta migración transnacional en el México central

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Carmona González, Maricela

2009-01-01

Full Text Available El objetivo fue determinar la prevalencia obesidad en niños y niñas escolares de 6-12 años de los hogares rurales, en localidades con tradición migratoria internacional de la región sur del Estado de México. Así mismo se describen las transformaciones en sus hábitos alimentarios y estilos de vida. Para determinar la prevalencia se obtuvo el Índice de Masa Corporal (IMC de 276 escolares de tres comunidades, divididos en 2 grupos: escolares con padre migrante y sin padre migrante, subdivididos por género, con el fin de observar alguna diferencia entre los grupos, y se aplicó una encuesta de frecuencia alimentaria para conocer las dietas de los escolares. Además de la observación participante para obtener información cualitativa sobre el comportamiento en las comidas, se realizaron 40 entrevistas informales las madres de los escolares para profundizar en los temas de la comida, la migración, las remesas y los estilos de vida. Se concluye que el acceso a recursos monetarios, provenientes de las remesas, de ingresos extra-agrícolas y/o de programas gubernamentales, son algunos de los factores que influyen para que en estas comunidades se den prevalencias de obesidad y sobre peso tan altas como las que se encuentran en el medio urbano.

Mediastinal microdialysis in the diagnosis of early anastomotic leakage after resection for cancer of the esophagus and gastroesophageal junction

DEFF Research Database (Denmark)

Pedersen, Mark Ellebæk; Qvist, N.; Fristrup, C.

2014-01-01

BACKGROUND: Anastomotic leakage (AL) after gastroesophageal resection for cancer is a serious complication. The aim was to evaluate mediastinal microdialysis in the detection of AL before clinical symptoms. METHODS: Sixty patients were included. Samples were collected every 4 hours in the 1st 8...

Mediastinal Bronchogenic Cyst With Acute Cardiac Dysfunction: Two-Stage Surgical Approach.

Science.gov (United States)

Smail, Hassiba; Baste, Jean Marc; Melki, Jean; Peillon, Christophe

2015-10-01

We describe a two-stage surgical approach in a patient with cardiac dysfunction and hemodynamic compromise resulting from a massive and compressive mediastinal bronchogenic cyst. To drain this cyst, video-assisted mediastinoscopy was performed as an emergency procedure, which immediately improved the patient's cardiac function. Five days later and under video thoracoscopy, resection of the cyst margins was impossible because the cyst was tightly adherent to the left atrium. We performed deroofing of this cyst through a right thoracotomy. The patient had an uncomplicated postoperative recovery, and no recurrence was observed at the long-term follow-up visit. Copyright © 2015 The Society of Thoracic Surgeons. Published by Elsevier Inc. All rights reserved.

Factores de riesgo modificables o no, relacionados con la densidad mineral ósea en mujeres de edad mediana Modifiable or not factors related to mineral bone density in middle aged women

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Cossette Díaz Socorro

2012-04-01

Full Text Available Introducción: en Cuba no existen datos nacionales acerca de la prevalencia de osteoporosis. Los cambios demográficos mundiales hacen necesaria la investigación y la difusión de la información relativas a la osteoporosis. Objetivo: identificar posibles diferencias en la densidad mineral ósea, de acuerdo con la presencia de factores de riesgo modificables o no, en mujeres de edad mediana. Métodos: se realizó un estudio descriptivo transversal con 259 pacientes que asistieron a la consulta ClimOs en el Instituto Nacional de Endocrinología, del cual se excluyeron las mujeres con osteoporosis secundaria. La densidad mineral ósea se determinó mediante absorciometría dual de rayos x en antebrazo distal y columna lumbar. Las pacientes se dividieron en 2 categorías: aquellas con densidad mineral ósea normal que se ubicaron en el grupo I, y las que presentaron baja densidad mineral ósea (osteopenia y/o osteoporosis constituyeron el grupo II. Para establecer diferencias entre grupos se emplearon las pruebas t de student y chi cuadrado, con un nivel de significación del 5 %. Se utilizó la regresión logística múltiple para el análisis de la densidad mineral ósea, integrando ambas regiones estudiadas. Resultados: al unir los resultados de la densitometría realizada en antebrazo y columna lumbar, de las 259 mujeres de edad mediana, el 72,2 % tenía baja masa ósea, que incluye a 99 pacientes (38,2 % con osteopenia, y 88 (34,0 % con diagnóstico de osteoporosis, solo 72 mujeres (27,8 % tuvieron una masa ósea normal. Al aplicar la regresión logística múltiple a las variables estadísticamente significativas: edad, color de la piel, antecedente patológico familiar de fractura, función ovárica, índice de masa corporal, hormona folículo estimulante, hormona luteinizante y estradiol, las que se asociaron con una mayor probabilidad de tener densidad mineral ósea disminuida fueron: color de la piel blanca (Odds Ratio= 3,949, p= 0

Características Antropométricas de Triatletas amateur Chilenos: Un estudio piloto

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Jorge A Sanhueza

2017-10-01

Full Text Available Introducción: Las características antropométricas de los triatletas son consideradas un importante factor condicionante del rendimiento deportivo. El objetivo del presente estudio fue caracterizar el perfil antropométrico de un grupo de triatletas amateur chilenos participantes de la prueba de medio Ironman de Pucón del año 2014 según categoría. Material y Métodos: Fueron evaluados 37 triatletas varones con un promedio de edad de 29,0 años y un peso de 74,3kg. Se midieron 25 variables antropométricas. Se calculó la composición corporal en cinco componentes y el somatotipo. Se utilizó estadística descriptiva para la caracterización de los triatletas amateur chilenos. Resultados: Los resultados del fraccionamiento muestran valores medios (desviación estándar de masa adiposa 23,9% (3,5, masa muscular 48,0% (3,4, masa residual 11,6% (8,0, masa ósea 11,3% (1,3 y masa piel 5,2% (0,3. También se observan diferencias significativas en la masa piel entre las categorías ≤24 años y ≥35 años, y presencia de un menor porcentaje de masa adiposa y mayor masa muscular en el grupo 25-34 años. En el somatotipo se presenta una dominancia meso-endomorfica, con diferencias significativas en el componente endomórfico, mayor en ≥35 años, y ectomórfico, mayor en ≤24 años. Conclusiones: Las características morfológicas de los triatletas amateur chilenos no se asemejan a la de triatletas profesionales, observándose elevados porcentajes de masa adiposa, sumatoria de 6 pliegues y endomorfía; bajo nivel de masa muscular y ósea y del componente ectomórfico, lo cual pudiese afectar su rendimiento en este tipo de pruebas.

Cromatografía de gases–espectrometría de masas de compuestos fitobioactivos del aceite esencial de Satureja incana

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Joseph Ricaldi Sarapura

2014-12-01

Full Text Available Objetivos: Analizar la composición de fitobioactivos del aceite esencial de Satureja incana por cromatografía de gases acoplada a espectrometría de masas (GC-MS, por sus siglas en inglés; y determinar rendimiento extractivo y características físico-químicas del aceite esencial de Satureja incana. Métodos: Se colectó ramas tiernas en estado de floración, con cortes de 20-35 cm, ubicación de recolecta a una altitud 2 682 msnm; distrito de Palca, provincia Tarma, región Junín. Extracción: equipo extractor de acero inoxidable, tiempo 1 hora. Caracterización físico-química: Norma Técnica Peruana. Análisis GC-SM: gas helio flujo 20 ml.min-1, inyección de 0,2 μl de aceite esencial, configuración térmica en gradiente. Resultados: El rendimiento de extracción fue 0,49 base seca con densidad relativa 0,9816; índice de refracción 1,4879 e índice de acidez 1,9860; y la composición fitoquímica: predomina concentración sesquiterpenica 66,37 % y monoterpenos 30,07 %; siendo los compuestos mayoritarios: germacreno D 25,91 %, β cariofileno 22,10 %, α-ocimeno 12,62 %, 4(8-p-mentona 6,73 %, humuleno 3,95 %, cariofileno óxido 3,08 %, limoneno 2,44 %; y minoritarios: β-bourbeneno 1,95 %, β-ocimeno 1,78 %, espatulenol 1,66 %, β-linalol 1,64 %, dlisopulegol 1,66 %, α-cubebeno 1,51 %, δ-Cadineno 0,89 %, α-pineno 0,45 %, β-pineno 0,52 %. Conclusiones: La presencia de algunos compuestos químicos respalda su uso etnofitofarmacobotánico. Presenta potencial característica para utilizarlo en formulaciones para plaguicidas debido a la presencia de germacreno D en alta concentración.

Peculiarities of diagnosis and surgical treatment of mediastinal thymomas complicated by myasthenia

International Nuclear Information System (INIS)

Gagua, R.; Todua, F.; Kuchava, V.; Gzirishvili, L.; Tsivtsivadze, G.; Vashakidze, M.

2013-01-01

The aim of this work is to improve the results of diagnosis and surgical treatment of mediastinal thymomas. With this reason, 128 patients with the tumors of thymus have been undergone operations at the Thoracic Department of the National Cancer Centre (NCC) of Georgia. Material and methods: Out of 128 patients, type A thymomas were diagnosed in 7, type AB - in 14, type B1 - in 52, typer B2 - in 32, type B3 - in 18 patients. Myasthenia was revealed in 51 patients. Most frequently myasthenia was found in type B1 (48.1%) and in type B2 (40.8%) thymomas while in type A and type AB - in 28.6% and in 28.5% correspondingly, but in type B3 myasthenia was found in 16.7%. Results: Helical Computerized Tomography (CT) is leading in diagnosis of mediastinal thymomas. Surgical method in the volume of thymomtymectomy is the best choice of treatment of thymomas and it is performed basically by sternotomic approach. The effectiveness of surgical treatment depended upon the optimization of patients presurgical preparing and it often included steroidal therapy and plasmapheresis. The period of post surgical liquidation of myasthenia signs was between 1 - 14 months. The remote results of treatment depend on histological type of tumor and its stage. At I-II stages of A and AB type thymomas, 100% of patients survived 5 and more years after radical operation, while in III stage - 86%. 5-year survival rate was 95-97% in thymomas of B1-3 types stage I, but at stage III it was no more than 38%. (author)

Prevalencia de hipotiroidismo y su asociación con factores de riesgo cardiometabólicos en mujeres adultas argentinas

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Lorena Rosalía Belén

2015-10-01

Full Text Available Introducción: El hipotiroidismo se asocia con factores de riesgo cardiometabólicos (FRC además de la edad y del sexo femenino. El principal objetivo fue conocer la prevalencia de hipotiroidismo y su asociación con FRC en mujeres adultas concurrentes a un Centro de Endocrinología de la Ciudad Autónoma de Buenos Aires, Argentina.Material y Métodos: Diseño transversal y observacional en muestra no probabilística de 316 mujeres adultas (40 a 65 años, categorizadas en hipotiroideas controladas con tratamiento farmacológico y eutiroideas. Variables: Se estudiaron los siguientes FRC: Índice Masa Corporal (IMC, <25kg/m2 y ≥25,0Kg/m2; circunferencia cintura (CC ≤88cm y >88cm; etapa biológica (premenopausia y posmenopausia, tabaquismo, sedentarismo; perfil lipídico alterado (ColT>200mg/dl; LDL-c>130mg/dl; Tg>150mg/dl; HDL-c<40mg/dl; HTA≥120/80mmHg y glucemia basal aumentada >100mg/dl. Estadística con SPSS 15.0 estableciendo medidas de tendencia central, ANOVA y OR con intervalos de confianza 95% (IC y diferencia de proporciones con valor p<0,05.Resultados: 46,2% hipotiroideas controladas y 53,8% eutiroideas; 64,2% posmenopáusicas; 68% con sobrepeso u obesidad y 45,2% con CC aumentada. La edad fue similar en ambos grupos: 53,3 (DS=6,4 años hipotiroideas y 53,9 (DS=6,6 años eutiroideas. Sedentarismo fue el FRC más prevalente en ambos grupos. Las hipotiroideas presentaron más riesgo de IMC aumentado (OR=0,36 IC95%=0,21-0,59; p=0,0001 y CC alterada (OR=0,53 IC95%=0,34-0,84; p=0,006 que las eutiroideas.Conclusiones: La prevalencia de hipotiroidismo se presentó aproximadamente en la mitad de la muestra. El estado nutricional alterado fue el único FRC asociado significativamente con el hipotiroidismo.

La cucharilla diatérmica en el tratamiento del cáncer

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Roberto Restrepo

1946-03-01

Full Text Available Frecuentemente se halla el radioterapeuta con masas cancerosas ulceradas, focos de infección que le presentan dificultades para un tratamiento adecuado. Estas masas son a veces obstáculo para aplicaciones correctas de rayos X, porque la masa misma, por su espesor, impide el paso de muchas radiaciones cuando se usan rayos de larga longitud de onda. Así, para hacer llegar suficiente dosis a la parte central de un cáncer, como hay que irradiar también tejido sano en el margen, a este último llega una cantidad grande de radiaciones que ponen en peligro su integridad, cuando a la base del tumor sólo ha llegado uan parte insuficiente de radiaciones, que a veces no alcanza a ser cancericida, a menos que se acudiera al método de fuegos cruzados, que larga el tratamiento y expone a la superposición de campos con todos sus inconvenientes. Y cuando se usa un aparato de pasta con radio las dificultades son a veces de orden mecánico.

Risk analysis and outcome of mediastinal wound and deep mediastinal wound infections with specific emphasis to omental transposition

LENUS (Irish Health Repository)

Parissis, Haralabos

2011-09-19

Abstract Background To report our experience, with Deep mediastinal wound infections (DMWI). Emphasis was given to the management of deep infections with omental flaps Methods From February 2000 to October 2007, out of 3896 cardiac surgery patients (prospective data collection) 120 pts (3.02%) developed sternal wound infections. There were 104 males & 16 females; (73.7%) CABG, (13.5%) Valves & (9.32%) CABG and Valve. Results Superficial sternal wound infection detected in 68 patients (1.75%) and fifty-two patients (1.34%) developed DMWI. The incremental risk factors for development of DMWI were: Diabetes (OR = 3.62, CI = 1.2-10.98), Pre Op Creatinine > 200 μmol\\/l (OR = 3.33, CI = 1.14-9.7) and Prolong ventilation (OR = 4.16, CI = 1.73-9.98). Overall mortality for the DMWI was 9.3% and the specific mortality of the omental flap group was 8.3%. 19% of the "DMWI group", developed complications: hematoma 6%, partial flap loss 3.0%, wound dehiscence 5.3%. Mean Hospital Stay: 59 ± 21.5 days. Conclusion Post cardiac surgery sternal wound complications remain challenging. The role of multidisciplinary approach is fundamental, as is the importance of an aggressive early wound exploration especially for deep sternal infections.

Precipitaciones extremas y sus implicaciones en procesos de remoción en masa en la planificación urbana de Tampico, México

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Diego Sánchez González

2011-01-01

Full Text Available La investigación analiza la peligrosidad y exposición de las precipitaciones extremas y sus implicaciones en la evaluación y zonificación de los procesos de remoción en masa en la ciudad de Tampico, localizada en la cuenca baja del río Pánuco, México. La metodología emplea un Sistema de Información Geográfica para la agregación de los datos hidrometeorológicos y geomorfológicos, posibilitando el análisis de las variaciones espacio-temporales de las precipitaciones extremas, y sus implicaciones en la evaluación y zonificación de los procesos de remoción en masa, necesarios para la planificación urbana de Tampico. Los resultados indican que la distribución de las precipitaciones extremas favorece la alta agresividad climática, determinante de los procesos de erosión del suelo y de los peligros geomorfológicos, como desprendimientos y flujos de detritos, en el área de estudio. Asimismo, en los próximos años se prevé el aumento de los procesos de remoción en masa asociados a factores ambientales, por un incremento de la ocurrencia e intensidad de las precipitaciones extremas, y a factores antrópicos, por el crecimiento de la población y viviendas expuestas a áreas inestables.

Motion-specific internal target volumes for FDG-avid mediastinal and hilar lymph nodes

International Nuclear Information System (INIS)

Lamb, James M.; Robinson, Clifford G.; Bradley, Jeffrey D.; Low, Daniel A.

2013-01-01

Background and purpose: To quantify the benefit of motion-specific internal target volumes for FDG-avid mediastinal and hilar lymph nodes generated using 4D-PET, vs. conventional internal target volumes generated using non-respiratory gated PET and 4D-CT scans. Materials and methods: Five patients with FDG-avid tumors metastatic to 11 hilar or mediastinal lymph nodes were imaged with respiratory-correlated FDG-PET (4D-PET) and 4D-CT. FDG-avid nodes were contoured by a radiation oncologist in two ways. Standard-of-care volumes were contoured using conventional un-gated PET, 4D-CT, and breath-hold CT. A second, motion-specific, set of volumes were contoured using 4D-PET.Contours based on 4D-PET corresponded directly to an internal target volume (ITV 4D ), whereas contours based on un-gated PET were expanded by a series of exploratory isotropic margins (from 5 to 13 mm) based on literature recommendations on lymph node motion to form internal target volumes (ITV 3D ). Results: A 13 mm expansion of the un-gated PET nodal volume was needed to cover the ITV 4D for 10 of 11 nodes studied. The ITV 3D based on a 13 mm expansion included on average 45 cm 3 of tissue that was not included in the ITV 4D . Conclusions: Motion-specific lymph-node internal target volumes generated from 4D-PET imaging could be used to improve accuracy and/or reduce normal-tissue irradiation compared to the standard-of-care un-gated PET based internal target volumes

Estructura vertical, temporal y espacial de las masas de aire extremas en la República Argentina en invierno Vertical, temporal and spatial structure of the extreme air masses in Argentine during winter

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Alejandra S Coronel

2006-12-01

Full Text Available Se identificó la masa de aire a través de la temperatura potencial adiabática equivalente (θae en 850 hPa, en Resistencia, Ezeiza y Comodoro Rivadavia, en los inviernos del período 1959/1991. Se definieron las masas extremas frías y cálidas a partir del primer y último quintil de θae en 850 hPa., respectivamente, y se analizó el primer día de ocurrencia de estas masas: evento frío y evento cálido. La selección de eventos extremos realizada es un discriminante estadísticamente significativo en el comportamiento de los parámetros de superficie como temperatura, presión y humedad en diferentes horas del día. En los días previos y posteriores a la ocurrencia del evento frío se identificó: en superficie un máximo de presión, un mínimo de temperatura que ocurre el día del evento y una mayor probabilidad de precipitación previa a la ocurrencia del evento. En la tropósfera se manifestó un máximo enfriamiento y estabilización de la masa de aire a partir del día del evento. Con referencia al evento cálido se pudo identificar: en superficie un mínimo de presión y un máximo de temperatura y una mayor probabilidad de precipitación posterior a la ocurrencia del evento. En la tropósfera se observó el máximo calentamiento el día del evento.Using the potential equivalent adiabatic temperature in 850 hPa at Resistencia, Ezeiza y Comodoro Rivadavia the air mass is identified. Extreme cold and warm air masses were defined, both identified using quantiles classification of θae at 850 hPa. The relationship of the values of θae at 850 hPa of extreme cold and warm air masses with surface parameters as temperature, pressure and humidity at different hours of the day is statistically significant using a discriminant analysis. The temporal evolution of the variables at surface as well as in the troposphere during the days before and after the occurrence of the cold event helped to identify that: on the surface a pressure maximum

Propuesta de una ecuación lineal para valorar la velocidad de crecimiento somático a partir de la masa corporal de ratas machos Wistar

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Marco Antonio Cossio-Bolanos

2012-04-01

Full Text Available Introducción: Para conocer el grado de maduración biológica de los roedores es necesaria la aplicación de métodos invasivos y no-invasivos, para lo cual los estudios que engloban diversas cepas de ratas necesitan de procedimientos simples de manera de controlar los efectos de confusión que la maduración biológica pudiera ocasionar. Objetivos: Determinar la velocidad de crecimiento (VC de ratas machos Wistar a partir de la masa corporal y proponer ecuaciones de regresión lineal para predecir el pico de velocidad de crecimiento (PVC. Diseño: Estudio longitudinal de cohorte. Institución: Universidad Estadual de Campinas, São Paulo, Brasil, Departamento de Farmacología. Métodos: De un total de 101 ratas, se seleccionó de forma probabilística-aleatoria (tablas aleatorias 25 ratas machos Wistar de 3 semanas de vida (21 días de edad. Se evaluó la masa corporal (g cada semana, hasta las 16 semanas de vida. Para el análisis estadístico se utilizó la estadística descriptiva de la media aritmética (X y desviación estándar (DE. Para determinar las diferencias significativas entre las edades se usó ANOVA para medidas repetitivas (p<0,001 y para correlacionar las variables de edad, peso y PVC se utilizó (r de Pearson (p<0,001. La predicción del PVC se efectuó a través del análisis de regresión lineal simple y múltiple StepWise (p<0,001. Principales medidas de resultados: Velocidad de crecimiento; propuesta de ecuaciones de regresión lineal para predecir el pico de velocidad de crecimiento. Resultados: Los resultados muestran que la velocidad de crecimiento evaluada a través de la masa corporal se presentó alrededor de los 42 días de vida. Con dichos resultados se generó tres ecuaciones de regresión lineal simple y múltiple, donde el coeficiente de determinación (R² para el modelo 1 fue 0,99, para el modelo 2, 0,89 y para el modelo 3, 0,99, respectivamente. Estas ecuaciones permiten predecir la proximidad y el

Síntesis y actividad citotóxica de conjugados de la uridina con triterpenos en células de cáncer de mama

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Jhon Fernando Berrío Escobar

Full Text Available Objetivos: Sintetizar conjugados del acetónido de la uridina con triterpenos (colesterol y 3β-5α,8α-endoperoxido-colest-6-en-3-ol y ácido succínico como puente. Métodos: Se preparó el acetónido de la uridina en acetona mediante catálisis ácida. Se prepararon los succinatos de los esteroles con anhídrido succínico y catalizador nucleofílico 4-N,N-dimetilamino-piridina (DMAP. Los conjugados 1 y 2 se sintetizaron mediante la esterificación de Steglich, con agente de acoplamiento N,N'-diciclohexilcarbodiimida (DCCy DMAP. Los compuestos se caracterizaron por espectroscopia de RMN (¹H RMN y 13C RMN y espectrometría de masas. Los derivados se evaluaron sobre líneas celulares de ovario de hámster chino (CHO-K1 y de cáncer de mamá (MCF-7. Resultados: Se obtuvieron derivados conjugados del acetónido de la uridina con dos triterpenos con rendimientos superiores al 80%. Los conjugados de uridina con triterpenos no presentaron inhibición significativa de la viabilidad celular sobre las líneas celulares MCF-7 y CHO-K1, tampoco se evidenció una relación dosis-respuesta para los compuestos evaluados. Conclusiones: El método de esterificación con agentes de acoplamiento permitió obtener conjugados de la uridina con triterpenos empleando el ácido succínico como puente. Sin embargo los derivados de uridina obtenidos no presentaron actividad citotóxica significativa (p<0,05 sobre las líneas celulares evaluadas.

Punción aspiración con aguja fina de nódulos tiroideos

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Iván Pimienta Concepción

2017-06-01

Full Text Available La punción aspirativa con aguja fina es una técnica muy habitual en las últimas décadas, que interpretada por un citólogo experto proporciona una información muy valiosa, se basa en un método simple, mínimamente invasivo y preciso para diagnosticar masas superficiales tales como los nódulos tiroideos; definidos por la Asociación Tiroidea Americana como discretas lesiones dentro de la glándula tiroidea imagenológicamente distintas del parénquima tiroideo. En los nódulos fríos indica si la citología es benigna, dudosa o maligna, con escasas probabilidades de error. En los carcinomas papilares su fiabilidad se acerca al 100% e igualmente en los carcinomas anaplásicos y carcinomas medulares; no así en los adenomas foliculares que son indiferenciables de los carcinomas, por lo cual el diagnóstico de proliferación folicular no es definitivo hasta después de la cirugía cuando esté el informe histopatológico de la biopsia por parafina, que sí es concluyente. En esta revisión bibliográfica se abordan los referentes teóricos más actuales sobre la importancia de la punción aspiración con aguja fina en el estudio de las lesiones nodulares de la glándula tiroides, tanto a nivel nacional como internacional, si se tiene en cuenta la tendencia al incremento del cáncer de tiroides en el Ecuador.

Valor nutritivo de pan con sustitución parcial de harina de trigo (Triticum aestivum por arracacha (Arracacia xanthorrhiza Bancroft, fortificado

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María Elena León Marroú

2010-01-01

Full Text Available Se realizó un estudio de la composición química y el valor nutricional de pan fortificado con hierro, elaborado en Perú, con sustitución parcial de harina de trigo en un 40 % por una masa de consistencia pastosa de raíces de Arracacha, un cultivo andino subexplotado por la aplicación de tecnologías empíricas y desplazado por patrones de consumo foráneo. Se describen brevemente aspectos tecnológicos de la elaboración del pan. El pan fortificado presenta contenidos de proteína 8,32 %; grasa 10,11 % y carbohidratos 55,13 % con un valor energético de 344,79 kcal/100 g; aporta principalmente K (77,05 mg/100 g, Fe (> 5 mg/100 g, P (19,87 mg/100 g, Ca (19,29 mg/100 g y Mg (11,93 mg/100 g, entre otros y vitaminas A (28,52 UI y C (10,75 UI, estando presentes en menor cuantía las vitaminas E y del complejo B. Para los elementos y vitaminas, el pan satisface parte de las Cantidades Diarias Recomendadas y en ninguno de los casos los Niveles de Ingesta Máximos Tolerables son excedidos.

Valor nutritivo de pan con sustitución parcial de harina de trigo (Triticum aestivum por arracacha (Arracacia xanthorrhiza Bancroft, fortificado

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María Elena León Marroú

2010-12-01

Full Text Available Se realizó un estudio de la composición química y el valor nutricional de pan fortificado con hierro, elaborado en Perú, con sustitución parcial de harina de trigo en un 40 % por una masa de consistencia pastosa de raíces de Arracacha, un cultivo andino subexplotado por la aplicación de tecnologías empíricas y desplazado por patrones de consumo foráneo. Se describen brevemente aspectos tecnológicos de la elaboración del pan. El pan fortificado presenta contenidos de proteína 8,32 %; grasa 10,11 % y carbohidratos 55,13 % con un valor energético de 344,79 kcal/100 g; aporta principalmente K (77,05 mg/100 g, Fe (> 5 mg/100 g, P (19,87 mg/100 g, Ca (19,29 mg/100 g y Mg (11,93 mg/100 g, entre otros y vitaminas A (28,52 UI y C (10,75 UI, estando presentes en menor cuantía las vitaminas E y del complejo B. Para los elementos y vitaminas, el pan satisface parte de las Cantidades Diarias Recomendadas y en ninguno de los casos los Niveles de Ingesta Máximos Tolerables son excedidos.