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Search Results: 1 - 10 of 33868 matches for " Antonio Velasco-Guardado "
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Prognostic factors for recurrence of gastrointestinal bleeding due to Dieulafoy's lesion
Yuliana Jamanca-Poma,Antonio Velasco-Guardado,Concepción Pi?ero-Pérez,Renzo Calderón-Begazo
World Journal of Gastroenterology , 2012, DOI: 10.3748/wjg.v18.i40.5734
Abstract: AIM: To analyze the effectiveness of the endoscopic therapy and to identify prognostic factors for recurrent bleeding. METHODS: Retrospective study of patients with gastrointestinal bleeding secondary to Dieulafoy’s lesion (DL) from 2005 to 2011. We analyzed the demographic characteristics of the patients, risk factors for gastrointestinal bleeding, endoscopic findings, characteristics of the endoscopic treatment, and the recurrence of bleeding. We included cases in which endoscopy described a lesion compatible with Dieulafoy. We excluded patients who had potentially bleeding lesions such as angiodysplasia in other areas or had undergone other gastrointestinal endoscopic procedures. RESULTS: Twenty-nine patients with DL were identified. Most of them were men with an average age of 71.5 years. Fifty-five percent of the patients received antiaggregatory or anticoagulant therapy. The most common location for DL was the stomach (51.7%). The main type of bleeding was oozing in 65.5% of cases. In 27.6% of cases, there was arterial (spurting) bleeding, and 6.9% of the patients presented with an adherent clot. A single endoscopic treatment was applied to nine patients (31%); eight of them with adrenaline and one with argon, while 69% of the patients received combined treatment. Six patients (20.7%) presented with recurrent bleeding at a median of 4 d after endoscopy (interquartile range = 97.75). Within these six patients, the new endoscopic treatment obtained a therapeutic success of 100%. The presence of arterial bleeding at endoscopy was associated with a higher recurrence rate for bleeding (50% vs 33.3% for other type of bleeding) [P = 0.024, odds ratio (OR) = 8.5, 95% CI = 1.13-63.87]. The use of combined endoscopic treatment prevented the recurrence of bleeding (10% vs 44.4% of single treatment) (P = 0.034, OR = 0.14, 95% CI = 0.19-0.99). CONCLUSION: Endoscopic treatment of DL is safe and effective. Adrenaline monotherapy and arterial (spurting) bleeding are associated with a high rate of bleeding recurrence.
Endoscopic evaluation and histological findings in graft-versus-host disease Evaluación endoscópica y hallazgos histológicos en la enfermedad de injerto contra huésped
Antonio Velasco-Guardado,Lucía López-Corral,Alberto álvarez-Delgado,Teresa Flores-Corral
Revista Espa?ola de Enfermedades Digestivas , 2012,
Abstract: Background: the gastrointestinal (GI) tract is the major target site of the graft-versus-host disease (GVHD). Diagnosis is based on endoscopic and histological findings. Material and methods: we performed a retrospective study from January 1st, 1990 to December 31st, 2008 on 338 upper gastrointestinal endoscopies (gastroscopies) performed to 197 patients that underwent an allogeneic transplant with clinical suspicion of GI-GVHD. Results: endoscopic findings to the diagnosis of GVHD have a sensitivity (S) of 34%, specificity levels (SP) of 65%, a positive predictive value (PPV) of 73% and a negative predictive value (NPV) of 48%. The histological study of the endoscopic biopsies has a global sensibility of 85.6% SP = 34.6% PPV = 64.2% and NPV = 63.7%. Histological grade was correlated with the clinical grade of acute GVHD (p = 0.018). Conclusion: upper gastrointestinal endoscopy is useful for the diagnosis of GVHD, as it allows biopsies that can ultimately lead to the diagnosis, but with limited accuracy because the histological findings have low sensitivity and specificity, while the endoscopic findings are generally nonspecific. Introducción: el tracto gastrointestinal es la diana principal de afectación en la enfermedad de injerto contra huésped (EICH). Su diagnóstico se basa en los hallazgos endoscópicos e histológicos. Material y métodos: hemos realizado un estudio retrospectivo, desde el 1 de enero de 1990 hasta el 30 de diciembre de 2008, de 338 endoscopias digestivas altas realizadas a 197 pacientes sometidos a trasplante alogénico de células hematopoyéticas con sospecha de EICH gastrointestinal. Resultados: los hallazgos endoscópicos tienen una sensibilidad (S) del 34%, especificidad (E) del 65%, valor predictivo positivo (VPP) del 73% y valor predictivo negativo (VPN) del 48% para el diagnóstico de EICH. El estudio histológico de las biopsias tiene una S del 85,6%, E del 34,6%, VPP del 64,2% y VPN del 63,7%. El grado histológico se correlacionó con el grado clínico en la EICH aguda (p = 0,0018). Conclusión: la endoscopia digestiva alta es útil para el diagnóstico de EICH, ya que permite la toma de biopsias que finalmente pueden llevar al diagnóstico, pero con una rentabilidad limitada ya que los hallazgos histológicos tienen una sensibilidad y especificidad bajas, mientras que los endoscópicos son generalmente inespecíficos.
Endoscopic image of an ileo-colonic intussusception Imagen endoscópica de una intususcepción íleo-colónica
Antonio Velasco-Guardado,Juan Ignacio González-Mu?oz,Beatriz Prieto-Bermejo,Luis Mu?oz-Belvis
Revista Espa?ola de Enfermedades Digestivas , 2011,
Abstract:
Cytomegalovirus ileitis in an immunocompetent patient Ileítis por citomegalovirus en paciente inmunocompetente
María Auxiliadora Tejedor-Cerde?a,Antonio Velasco-Guardado,Ana Fernández-Prodomingo,María Concepción Pi?ero-Pérez
Revista Espa?ola de Enfermedades Digestivas , 2011,
Abstract: Cytomegalovirus (CMV) is a virus that belongs to the family of Herpesviridae. Infection can cause a serious disease in immunocompromised patients, but it can also affect immunocompetent patients, creating generally self limiting symptoms. However, in some cases it can be fatal. We present a case of CMV ileitis with serious clinical symptoms that led to an operation in an immunocompetent patient. El citomegalovirus (CMV) es un virus perteneciente a la familia de los Herperviridae. La infección puede causar una enfermedad grave en inmunodeprimidos, sin embargo también puede afectar a inmunocompetentes, y da lugar a cuadros clínicos generalmente autolimitados, aunque se han descrito casos graves que pueden llevar a la muerte. Presentamos un caso de ileítis por CMV con manifestaciones clínicas graves que motivaron intervención quirúrgica urgente en un paciente inmunocompetente.
Cytomegalovirus ileitis in an immunocompetent patient
Tejedor-Cerde?a,María Auxiliadora; Velasco-Guardado,Antonio; Fernández-Prodomingo,Ana; Pi?ero-Pérez,María Concepción; Calderón,Renzo; Prieto-Bermejo,Ana Beatriz; Sánchez-Garrido,Ana; Martínez-Moreno,Juan; Geijo-Martínez,Fernando; Blanco-Mú?ez,óscar Javier; Rodríguez-Pérez,Antonio;
Revista Espa?ola de Enfermedades Digestivas , 2011, DOI: 10.4321/S1130-01082011000300009
Abstract: cytomegalovirus (cmv) is a virus that belongs to the family of herpesviridae. infection can cause a serious disease in immunocompromised patients, but it can also affect immunocompetent patients, creating generally self limiting symptoms. however, in some cases it can be fatal. we present a case of cmv ileitis with serious clinical symptoms that led to an operation in an immunocompetent patient.
Jalisco: democracia electoral con déficit de legitimidad política
Marco Antonio Cortés Guardado,Ismael Ortiz Barba
Espiral , 2007,
Abstract: En este artículo se explora la configuración del sistema electoral de Jalisco, analizando las consecuencias institucionales y políticas de las reformas electorales y el reacomodo en las relaciones de poder. Particularmente, saca a la luz una aparente paradoja: mientras más competida y equitativa es la competencia electoral, y más equilibrada la representación política, crecen también los sentimientos de desafección de los jaliscienses en relación con la política y sus componentes. La modernización política del estado, acompa ada de mayor democracia, redunda curiosamente en una legitimidad menguante, en mayor desconfianza hacia la política, así como en índices decrecientes de participación electoral.
Epistemología de la representación del cambio social
Velasco Castro,Antonio José;
EPISTEME , 2009,
Abstract: in social sciences, the epistemological examination of what enables the isomorphism (i.e.; similarity or correspondence) between text and society, has been left behind. it is usually supposed without questioning their validity. the main epistemological matters involving the reproduction of social change in the text are developed herein: it is postulated a division of social reality into levels and there are considered certain conditions of validity for the inference process about events from one level to another. the aim is to propose a formalizable analytical model which be useful for studying the relationship between discourse and reality in the light of social change. the achievements were:(1o) defining two sets of conditions of the validity of interlevel inference(i.e.; between levels of social reality), (2o) expressing change as an interlevel phenomenon for a group of sequences in a homeomorphic synchronic relation, and (3o) analyzing the causal manifestation of social change in a high level through the process of interlevel causality. the results are a first step towards the creation of an interdisciplinary theory which allows to formally analyze the more general types of problems involved in the inference between different levels of reality.
La inversa de Penrose
Velasco Mu?oz Antonio
Revista Colombiana de Estadística , 1979,
Abstract:
Análisis sobre la transición a una sociedad estatal en la cuenca media del Segura en época ibérica (s. VI-III a.C.)
Santos Velasco, Juan Antonio
Trabajos de Prehistoria , 1989,
Abstract: From the sixth century B. C. on, the process of iberization in south-east Spain can be understood through a model of social change, in which the last traces of gentile society gradually give way to the formation of city states. A partir del siglo VI a.C. la iberización en el Sureste peninsular se entiende como un modelo de transición social, en el que los últimos vestigios de la sociedad gentilicia dan paso paulatinamente a la configuración de la ciudad-estado.
Borrar la experiencia. De la experiencia individual a la historia social
Antonio Velasco-Castro
Nómadas , 2007,
Abstract: En este artículo se considera el tema de la experiencia, su estructura, sus formas y cómo se la puede afectar, considerándose sus manipulaciones considerables socialmente como positivas y negativas , especialmente en el caso del llamado control mental , lo cual lleva a tener en cuenta la cuestión de cuánto es verdadero en nuestras experiencias.
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