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Search Results: 1 - 10 of 179469 matches for " B. Hernández Sierra "
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Valores de referencia del electrorretinograma en el laboratorio de electrofisiología visual del Centro Internacional de Retinosis Pigmentaria "Camilo Cienfuegos Reference values of the electroretinogram in the visual electrophysiology laboratory from the "Camilo Cienfuegos" Pigmentary Retinosis International Center
Alberto Barrientos Casta?o,Maritza Herrera Mora,Obel García Báez,Milagros Sierra Hernández
Revista Cubana de Oftalmolog?-a , 2011,
Abstract: OBJETIVO: Obtener los valores de referencia del electrorretinograma diferenciado de conos y bastones para el laboratorio de electrofisiología visual de la clínica "Camilo Cienfuegos". MéTODOS: Se seleccionaron 50 individuos sanos al azar en la clínica "Camilo Cienfuegos", a quienes se les realizó el electrorretinograma según los parámetros planteados por el comité internacional para la estandarización, de la Sociedad Internacional para la Electrofisiología Clínica de la Visión. Se midieron las amplitudes y tiempos implícitos de las principales ondas en las cinco respuestas básicas y una opcional. RESULTADOS: Se obtuvieron las cinco respuestas básicas con morfología similar a la planteada por otros autores. En la respuesta de bastones la onda "b" estuvo entre 72 y 89 ms con una amplitud entre 128 y 380 μv. Se obtuvo una respuesta combinada con ondas "a" y "b" desdobladas. Se registraron potenciales oscilatorios con 4 y 5 componentes. Los valores y morfología de las ondas en la respuesta de conos y el flicker se corresponden con la reportada por otros autores. CONCLUSIONES: Se obtuvieron los valores de referencia del electrorretinograma para este laboratorio según estandarización internacional, con morfología, amplitud y tiempos implícitos similar a los obtenidos por otros autores. OBJECTIVE: To obtain the normal reference values of cone-rod standard electroretinogram in electrophysiology visual department of Camilo Cienfuegos Hospital. METHODS: 50 healthy individuals were studied and submitted to standard electroretinogram in electrophysiology visual department of "Camilo Cienfuegos" Hospital in Havana. We performed the electroretinogram according to the parameters of the standard committee of the International Society for Clinical Electrophysiology of Vision. The amplitud and implicit times of the main waves were measured in the five basic and an additional optional scotopic reponses. RESULTS: The five basic responses were obtained with similar morphology than other authors. In the rod response the b wave was between 72 and 89 ms with an amplitude between 128 and 380 μv. A combined response was obtained with "a" and "b" unfold wave. Scotopic oscillatory potentials with 4 and 5 components was obtained. The values and morphology of the waves in cones and flicker responses were similar that one reported by other authors. CONCLUSIONS: The normal reference values of the main clinical indicators of electroretinogram were obtained according to the standardized methodologies for our laboratory.
Valores de referencia del electrooculograma Reference values for electrooculography
Alberto Barrientos Casta?o,Maritza Herrera Mora,Obel García Báez,Milagros Sierra Hernández
Revista Cubana de Investigaciones Biom??dicas , 2012,
Abstract: Objetivo: obtener los valores de referencia del electrooculograma según los patrones normados por el Comité de Estandarización de la Sociedad Internacional para la Electrofisiología Clínica de la Visión (ISCEV). Métodos: se seleccionaron al azar 27 individuos sanos entre los trabajadores del Centro Internacional de Retinosis Pigmentaria "Camilo Cienfuegos". Se les realizó el electrooculograma según los parámetros planteados por el Comité de Estandarización de la ISCEV. Se midieron los valores de los principales indicadores de importancia clínica del electrooculograma (índice de Arden, la amplitud de pico de oscuridad y el tiempo de aparición del pico de luz en la fase de claridad). Resultados: los valores más bajos de amplitud del potencial estuvieron entre 388 y 882 μv en la fase de oscuridad. El pico de luz se obtuvo entre los 9 y los 10 min y durante esta fase el potencial alcanzó una amplitud entre 808 y 1 963 μv; esta variabilidad de las amplitudes puede estar relacionada con que la prueba se realizó sin midriasis pupilar. El valor de referencia del índice de Arden obtenido fue de 1,55 a 2,87. Conclusiones: se obtuvieron los valores de referencia de nuestro laboratorio para los principales indicadores de utilidad clínica del electrooculograma siguiendo metodologías estandarizadas. Objective: obtain electrooculographic reference values based on the patterns set by the Standardization Committee of the International Society for Clinical Electrophysiology of Vision (ISCEV). Methods: twenty-seven healthy individuals were selected at random among employees at "Camilo Cienfuegos" International Center for Retinitis Pigmentosa. An electrooculogram was performed on them following the parameters set by ISCEV Standardization Committee. A measurement was made of the main clinically important electrooculographic indicators (Arden index, dark peak amplitude and light peak emergence time in the light phase). Results: the lowest amplitude values of the potential ranged between 388 and 882 μv in the dark phase. The light peak was obtained between 9 and 10 minutes, and during this phase the potential reached an amplitude ranging between 808 and 1 963 μv. This amplitude variability may be related to the fact that the test was conducted without pupillary mydriasis. The reference value obtained for Arden index was 1,55 to 2,87. Conclusions: following standardized methodologies, reference values were obtained for the main clinically useful electrooculographic indicators. These indicators will be of use in our laboratory.
Eficacia y seguridad de la implantación de marcapasos transvenosos transitorios en una unidad de cuidados intensivos Efficacy and safety of non-permanent transvenous pacemaker implantation in an intensive care unit
J. Mu?oz Bono,M.A. Prieto Palomino,I. Macías Guarasa,B. Hernández Sierra
Medicina Intensiva , 2011,
Abstract: Objetivo: Analizar las características clínicas, indicaciones y morbimortalidad asociada a la implantación de marcapasos transvenosos transitorios. Dise o: Estudio observacional y prospectivo. ámbito: Unidad de cuidados intensivos cardiológicos. Pacientes: Se implantó marcapasos transvenoso transitorio a 182 pacientes, en un periodo de 4 a os. Variables recogidas: Se registraron variables demográficas, clínicas, indicaciones, vía de acceso, días de estancia en la unidad y complicaciones. Resultados: El 63% eran hombres, con una media de edad de 78±9,5 a os con bloqueo auriculoventricular sintomático en un 76,9% de los casos. La vía venosa de abordaje habitual fue la femoral (92,3%). El 40,11% sufrió complicaciones, siendo la más frecuente el hematoma en la zona de punción (13,19%). No hubo diferencias entre el profesional que implantó el marcapasos y la aparición de complicaciones. La agitación psicomotriz se asoció a la existencia de hematoma en la zona de punción (p=0,07) y a la necesidad de movilización del catéter (p=0,059). Se identificó la vía de inserción no femoral (p=0,012, OR=0,16; IC del 95%, 0,04-0,66), la agitación (p=0,006; OR=3,2; IC del 95%, 1,4-7,3) y la presencia de factores de riesgo cardiovascular (p=0,042; OR=5; IC del 95%, 1,06-14,2) como predictores de complicaciones. La realización del procedimiento por parte del personal especializado (p=0,0001) y la presencia de complicaciones (p=0,05) incrementaron la estancia en la unidad. Conclusiones: La presencia de agitación, los factores de riesgo cardiovascular y la inserción a través de la vena subclavia o yugular fueron predictores de complicaciones. Estas no se relacionaron con el tipo de profesional implicado en la implantación, pero incrementaron la estancia en la unidad. Objective: To analyze the clinical indications for use, morbidity and mortality associated with a non-permanent transvenous pacemaker. Design: Prospective and observational study. Setting: Cardiac intensive care unit. Method: One hundred and eighty-two patients with non-permanent pacemakers implanted consecutively over a period of four years. Data collected: Main variables of interest were demographic data, clinical indications, access route, length of stay and complications. Results: A total of 63% were men, with a median age of 78±9.5 years and with symptomatic third-degree atrioventricular block in 76.9% of the cases. Femoral vein access was preferred in 92.3% of the cases. Complications appeared in 40.11% of the patients, the most frequent being hematoma at the site of vascular access (13.19%). Restlessness wa
Perfil clínico-epidemiológico y taxonómico de la candidiasis sistémica en una unidad de cuidados intensivos Clinical, epidemiological and taxonomic aspects of systemic candidiasis in an intensive care unit
B. Hernández Sierra,M.á. Prieto Palomino,E. Curiel Balsera,J. Mu?oz Bono
Medicina Intensiva , 2009,
Abstract: Se define el perfil clínico de los pacientes con candidiasis sistémica ingresados en nuestra UCI y se realiza un análisis de mortalidad. Se analizaron retrospectivamente los casos de candidiasis sistémica durante 2002-2004 y, prospectivamente, durante 2005-2006, en una unidad de cuidados intensivos de un hospital de tercer nivel. Se registraron 26 casos (el 75% varones), cuyo principal motivo de ingreso fue la sepsis, con multiinstrumentación y una estancia prolongada. Se aisló Candida albicans en el 53,8% y otras cándidas en el 46,2%. La incidencia de otras cándidas fue superior a la de C. albicans desde el a o 2004 (p = 0,02). La mortalidad fue del 42%, más elevada en infecciones por C. albicans, en especial (p = 0,026) en los grupos progresivos de riesgo determinados en el Score Sevilla . The clinical and epidemiological profile and survival of patients admitted into our intensive care unit (ICU) was analyzed. A retrospective-prospective case series from 2002 to 2004 and 2005 to 2006, respectively, of patients diagnosed with systemic candidiasis in an ICU in a tertiary hospital was studied. Twenty-six cases with systemic candidiasis were included (75% of the cases were male). These subjects underwent multiple vascular or drainage interventions and had a prolonged length of stay in ICU. The first motive to enter ICU was sepsis. Candida albicans (CA) was isolated in 53.8% of cases versus 46.2% for other Candidae (CNA). Over the last years, we have observed a progressively higher incidence for CNA (p = 0.02). We registered an especially high mortality rate (42%), that is higher in the CA group. Sevilla Score defined the mortality in the progressive risk groups (p = 0.026).
Eficacia y seguridad de la implantación de marcapasos transvenosos transitorios en una unidad de cuidados intensivos
Mu?oz Bono,J.; Prieto Palomino,M.A.; Macías Guarasa,I.; Hernández Sierra,B.; Jiménez Pérez,G.; Curiel Balsera,E.; Quesada García,G.;
Medicina Intensiva , 2011,
Abstract: objective: to analyze the clinical indications for use, morbidity and mortality associated with a non-permanent transvenous pacemaker. design: prospective and observational study. setting: cardiac intensive care unit. method: one hundred and eighty-two patients with non-permanent pacemakers implanted consecutively over a period of four years. data collected: main variables of interest were demographic data, clinical indications, access route, length of stay and complications. results: a total of 63% were men, with a median age of 78±9.5 years and with symptomatic third-degree atrioventricular block in 76.9% of the cases. femoral vein access was preferred in 92.3% of the cases. complications appeared in 40.11% of the patients, the most frequent being hematoma at the site of vascular access (13.19%). restlessness was associated to the need for repositioning the pacemaker due to a shift in the electrode (p=0.059) and to hematoma (p=0.07). subclavian or jugular vein lead insertion (p=0.012; or=0.16; 95%ci, 0.04-0.66), restlessness during admission to icu (p=0.006; or=3.2; 95%ci, 1.4-7.3), and the presence of cardiovascular risk factors (p=0.042; or=5; 95%ci, 1.06-14.2) were identified by multivariate analysis as being predictors of complications. length of stay in icu was significantly longer when lead insertion was carried out by specialized staff (p=0.0001), and in the presence of complications (p=0.05). conclusions: predictfurors of complications were restlessness, cardiovascular risk factors, and insertion through the jugular or subclavian vein. complications prolonged icu stay and were not related to the professionals involved.
Perfil clínico-epidemiológico y taxonómico de la candidiasis sistémica en una unidad de cuidados intensivos
Hernández Sierra,B.; Prieto Palomino,M.á.; Curiel Balsera,E.; Mu?oz Bono,J.; Quesada García,G.; Arias Verdú,M.D.;
Medicina Intensiva , 2009,
Abstract: the clinical and epidemiological profile and survival of patients admitted into our intensive care unit (icu) was analyzed. a retrospective-prospective case series from 2002 to 2004 and 2005 to 2006, respectively, of patients diagnosed with systemic candidiasis in an icu in a tertiary hospital was studied. twenty-six cases with systemic candidiasis were included (75% of the cases were male). these subjects underwent multiple vascular or drainage interventions and had a prolonged length of stay in icu. the first motive to enter icu was sepsis. candida albicans (ca) was isolated in 53.8% of cases versus 46.2% for other candidae (cna). over the last years, we have observed a progressively higher incidence for cna (p = 0.02). we registered an especially high mortality rate (42%), that is higher in the ca group. ?sevilla score? defined the mortality in the progressive risk groups (p = 0.026).
Valores de referencia del electrorretinograma en el laboratorio de electrofisiología visual del Centro Internacional de Retinosis Pigmentaria "Camilo Cienfuegos
Barrientos Casta?o,Alberto; Herrera Mora,Maritza; García Báez,Obel; Sierra Hernández,Milagros; Pérez de la Rosa,Odalis;
Revista Cubana de Oftalmolog?-a , 2011,
Abstract: objective: to obtain the normal reference values of cone-rod standard electroretinogram in electrophysiology visual department of camilo cienfuegos hospital. methods: 50 healthy individuals were studied and submitted to standard electroretinogram in electrophysiology visual department of "camilo cienfuegos" hospital in havana. we performed the electroretinogram according to the parameters of the standard committee of the international society for clinical electrophysiology of vision. the amplitud and implicit times of the main waves were measured in the five basic and an additional optional scotopic reponses. results: the five basic responses were obtained with similar morphology than other authors. in the rod response the ?b? wave was between 72 and 89 ms with an amplitude between 128 and 380 μv. a combined response was obtained with "a" and "b" unfold wave. scotopic oscillatory potentials with 4 and 5 components was obtained. the values and morphology of the waves in cones and flicker responses were similar that one reported by other authors. conclusions: the normal reference values of the main clinical indicators of electroretinogram were obtained according to the standardized methodologies for our laboratory.
Factores predisponentes en la vasoplejía posoperatoria: Azul de metileno (réplica) Predisposing factors in post-operative vasoplegia: Methylene blue (reply)
J.M. Mora-Ordó?ez,E. Curiel-Balsera,B. Hernández-Sierra,F. Sánchez-Llorente
Medicina Intensiva , 2007,
Abstract:
Valor pronóstico del inmunofenotipo en la respuesta temprana de la leucemia aguda linfoblástica pre-B en ni?os
Correa-González, Lourdes Cecilia;Mandeville, Peter B;Manrique-Due?as, Javier;Alejo-González, Francisco;Salazar-Martínez, Abel;Pérez-Ramírez, Oscar de Jesús;Hernández-Sierra, Juan Francisco;
Gaceta médica de México , 2005,
Abstract: objective: to determine the prognostic value of pre b immunophenotype and its variants on early treatment response among of acute pediatric lymphoblast leukemia. patients and methods: a case control study nested in a cohort was carried out with male and female patients 15 years and younger with recently diagnosed pre b lymphoblast leukemia. a panel of b, t, monoclonal antibodies of the myelo monocytic and megakaryocytic cell type was used. response was assessed by bone marrow aspiration 14 days post treatment. results: 54 patients were included. the median age was 7 years (2 months - 14 years) median leukocyte count was 13,450/mm3 (1200-986,000/mm3). we identified 29 cases with late pre b immune phenotype, 19 cases with common pre b and 6 cases with early pre b immunophenotype. eleven patients also displayed myeloid antigens. a significant association (p=0.034) was found between early treatment response and the presence of myeloid antigens. no association was found between the pre b immunophenotype, age and leukocyte count with early treatment response (p=0.264). conclusions: we need to pay special emphasis on early treatment response in children with lymphoblast leukemia as our study did not corroborate the common finding that clinical factors and immune phenotype can be predictive factors.
Dieta, nutrición y cáncer gastrointestinal
Páramo Hernández,David; Sierra Arango,Fernando;
Revista Colombiana de Gastroenterologia , 2005,
Abstract: cancer is now a mayor cause of mortality throughout the world and the cancer gastric is first cause of death for neoplasia in colombia. the total number of cases of cancer is predicted to increase by 73% in the developing world, and the dietary factors are estimated to account for approximately 20% (but may grow with dietary change 30 %). we review from report of joint who/fao expert consultation: ?diet, nutrition and prevention of chronic disease?, explain the difficulty of causality in definitive relationships between diet and cancer risks and from reasonable evidence to indicate recommendation for the prevention of cancer gastrointestinal in our patients.
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