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Research paper thumbnail of Retinopatía de purtscher asociada a pancreatitis aguda

Gastroenterología y Hepatología, 2008

provocar una alteración en la pared de los vasos y del tejido circundante impidiendo su colapso, ... more provocar una alteración en la pared de los vasos y del tejido circundante impidiendo su colapso, lo que facilita la entrada de aire. Un tercer mecanismo son las bacterias formadoras de gas en un absceso intraabdominal, con o sin flebitis asociada 7,8 . La presencia de GVPH puede detectarse normalmente por radiografía convencional, TC o ecografía abdominal. El gas en el territorio portal se localiza a unos 2 cm de la cápsula hepática, debido a que éste se transporta hacia los pequeños radicales periféricos del hígado por el flujo centrífugo de la sangre venosa portal. Cuando el aire se localiza en la vía biliar, éste se sitúa en una posición más central del hígado debido al flujo centrípeto de la bilis. La TC tiene mayor sensibilidad que la radiografía abdominal en la detección de GVPH, además de identificar con mayor precisión la causa subyacente. La ecografía abdominal mostrará múltiples imágenes hiperecogénicas con sombra acústica, inconstantes 9 . La identificación de GVPH es un signo radiológico que inicialmente no diagnostica una enfermedad específica. El tratamiento de los pacientes con GVPH debería estar dirigido a la enfermedad de base. Así, la indicación de cirugía debe realizarse en pacientes con enfermedades causales no isquémicas que no responden al tratamiento conservador, enfermedades isquémicas y, especialmente, en las que presentan signos de perforación, peritonitis o sepsis abdominal 9,10 .

Research paper thumbnail of Pericarditis aguda secundaria al tratamiento con mesalazina

Gastroenterología y Hepatología, 2010

Research paper thumbnail of Esquistosomiasis intestinal

Gastroenterología y Hepatología, 2009

casos, publicado por Sookoian et al 2 , sugería un espectro clínico heterogéneo, que oscila entre... more casos, publicado por Sookoian et al 2 , sugería un espectro clínico heterogéneo, que oscila entre eccema, dermatitis psoriasiforme, erupción liquenoide (en 3 pacientes) y eritema. Posteriormente, Manjón-Haces et al 3 encontraron un predominio de lesiones eccematosas en 16 de 27 pacientes infectados por el VHC tratados con interferón y ribavirina, pero sólo 2 de los 27 presentaban una erupción liquenoide. El estudio histológico mostró una dermatitis perivascular superficial con espongiosis. Dereure 4 en su serie de 20 pacientes y Kerl 5 en su serie de 36 pacientes describieron un patrón clínico e histopatológico uniforme caracterizado por un infiltrado perivascular superficial inespecífico con espongiosis y vesiculación, presentándose clínicamente como lesiones eccematosas. Ninguno de estos pacientes presentó lesiones liquenoides. En todas estas series, las lesiones empezaron a manifestarse al cabo de una media de 2 semanas, con un rango que oscilaba entre los 5 días y los 8 meses.

Research paper thumbnail of Assessment of a Footstep Biometric Verification System

Advances in Pattern Recognition, 2009

... Verification System Rubén Vera Rodrıguez, John SD Mason, and Nicholas WD Evans ... RV Rodrıgu... more ... Verification System Rubén Vera Rodrıguez, John SD Mason, and Nicholas WD Evans ... RV Rodrıguez (B) Swansea University, Singleton Park, Swansea, SA2 8PP, UK, e-mail: r.vera-rodriguez.405831@swansea.ac.uk M. Tistarelli et al. ...

Research paper thumbnail of Footstep Recognition for a Smart Home Environment

This paper reports some experiments which assess the potential use of a footstep biometric verifi... more This paper reports some experiments which assess the potential use of a footstep biometric verification system for a smart home environment. We present a semi-automatic capture system and report results on a database with independent development and evaluation datasets comprised of more than 3500 footsteps collected from 55 persons. We present an optimisation of geometric and holistic feature extraction approaches. An equal error rate of 13% is obtained with holistic features classified with a support vector machine. The database is freely available to the research community.

Research paper thumbnail of AN EXPERIMENTAL STUDY ON THE FEASIBILITY OF FOOTSTEPS AS A BIOMETRIC

Page 1. AN EXPERIMENTAL STUDY ON THE FEASIBILITY OF FOOTSTEPS AS A BIOMETRIC Ruben Vera Rodriguez... more Page 1. AN EXPERIMENTAL STUDY ON THE FEASIBILITY OF FOOTSTEPS AS A BIOMETRIC Ruben Vera Rodriguez1, Nicholas WD Evans1,2, Richard P. Lewis1, Benoit Fauve1 and John SD Mason1 1School of Engineering ...

Research paper thumbnail of Thoracoscopic Lobectomy in Infants Less Than 10 kg with Prenatally Diagnosed Cystic Lung Disease

Journal of Laparoendoscopic & Advanced Surgical Techniques, 2011

Thoracoscopic lobectomy for congenital cystic lung lesions is an accepted technique in pediatric ... more Thoracoscopic lobectomy for congenital cystic lung lesions is an accepted technique in pediatric surgery. Since an increasing number of these lesions are detected prenatally, the safety and efficacy of infant resections have been questioned. We reviewed our experience over a 10-year period to evaluate early resection of these lesions. From January 2001 to August 2009, 75 patients under 1 year of age and weighing <10 kg underwent thoracoscopic lobectomy at two institutions. Patients carried the following diagnoses: 52 had congenital cystic adenomatoid malformation, 20 had bronchopulmonary sequestration, and 3 had congenital lobar emphysema. All lesions were confirmed after birth by computed tomography scan. Patient age at operation ranged from 4 days to 11 months and patient weight from 3.1 to 10 kg. Seventy-four of 75 lobectomies were thoracoscopically completed. There were 16 upper lobectomies, 1 middle lobectomy, and 55 lower lobectomies. Operative time ranged from 45 to 225 minutes. Hospital length of stay ranged from 1 to 5 days. A subset of 26 patients had surgery younger than 3 months of age and <5 kg, despite being asymptomatic. Their operative time averaged 90 minutes, and mean length of hospital stay was 1.5 days. Thoracoscopic lobectomy is safe for infants <10 kg and avoids the morbidity associated with thoracotomy. Operating early on younger patients may avoid the inflammatory changes associated with both clinically apparent and subclinical infections, even in patients weighing <5 kg. This may make the procedures less technically challenging and may result in lower complication and conversion rates.

Research paper thumbnail of Pancreatic Fistula Rates After 462 Distal Pancreatectomies: Staplers Do Not Decrease Fistula Rates

Journal of Gastrointestinal Surgery, 2008

Introduction Pancreatic fistula is a major source of morbidity after distal pancreatectomy (DP). ... more Introduction Pancreatic fistula is a major source of morbidity after distal pancreatectomy (DP). We reviewed 462 consecutive patients undergoing DP to determine if the method of stump closure impacted fistula rates. Methods A retrospective review of clinicopatologic variables of patients who underwent DP between February 1994 and February 2008 was performed. The International Study Group classification for pancreatic fistula was utilized (Bassi et al., Surgery, 138(1): 2005 ). Results The overall pancreatic fistula rate was 29% (133/462). DP with splenectomy was performed in 321 (69%) patients. Additional organs were resected in 116 (25%) patients. The pancreatic stump was closed with a fish-mouth suture closure in 227, of whom 67 (30%) developed a fistula. Pancreatic duct ligation did not decrease the fistula rate (29% vs. 30%). A free falciform patch was used in 108 patients, with a fistula rate of 28% (30/108). Stapled compared to stapled with staple line reinforcement had a fistula rate of 24% (10/41) vs. 33% (15/45). There is no significant difference in the rate of fistula formation between the different stump closures (p=0.73). On multivariate analysis, BMI>30 kg/m 2 , male gender, and an additional procedure were significant predictors of pancreatic fistula. Conclusions The pancreatic fistula rate was 29%. Staplers with or without staple line reinforcement do not significantly reduce fistula rates after DP. Reduction of pancreatic fistulas after DP remains an unsolved challenge.

Research paper thumbnail of Fiabilidad del eco-Doppler preoperatorio en el diseño de una estrategia terapéutica para la isquemia crónica del miembro inferior

Anales de Cirugía Vascular, 2009

Fiabilidad del eco-Doppler preoperatorio en el diseñ o de una estrategia terap eutica para la isq... more Fiabilidad del eco-Doppler preoperatorio en el diseñ o de una estrategia terap eutica para la isquemia cr onica del miembro inferior El objetivo del presente estudio fue comparar el plan de tratamiento diseñ ado en funci on de la evaluaci on preoperatoria con eco-Doppler de la isquemia cr ıtica de la extremidad con el plan de tratamiento llevado a cabo en ultimo t ermino, despu es de valorar los hallazgos obtenidos durante el tratamiento quir urgico o endovascular. Durante un per ıodo de 51 meses, se efectu o un estudio eco-Doppler preoperatorio en 335 pacientes consecutivos con isquemia cr onica cr ıtica, para diseñ ar la mejor estrategia terap eutica. El grado de concordancia entre ambos planes fue el siguiente: 80%, 82,7% y 59% en los ex amenes de las arterias il ıacas, femoropopl ıteas o tibiales, respectivamente. El plan operatorio se modific o con m as frecuencia debido al fallo del eco-Doppler en procedimientos relacionados con vasos distales (10 de 44 [22,7%], p < 0,01). En conclusi on, la evaluaci on con eco-Doppler de pacientes con enfermedad arterial oclusiva del miembro inferior permite el diseñ o de un plan de tratamiento tanto m edico como quir urgico o endovascular con un nivel elevado de concordancia con los hallazgos obtenidos durante el procedimiento de revascularizaci on.

Research paper thumbnail of Retinopatía de purtscher asociada a pancreatitis aguda

Gastroenterología y Hepatología, 2008

provocar una alteración en la pared de los vasos y del tejido circundante impidiendo su colapso, ... more provocar una alteración en la pared de los vasos y del tejido circundante impidiendo su colapso, lo que facilita la entrada de aire. Un tercer mecanismo son las bacterias formadoras de gas en un absceso intraabdominal, con o sin flebitis asociada 7,8 . La presencia de GVPH puede detectarse normalmente por radiografía convencional, TC o ecografía abdominal. El gas en el territorio portal se localiza a unos 2 cm de la cápsula hepática, debido a que éste se transporta hacia los pequeños radicales periféricos del hígado por el flujo centrífugo de la sangre venosa portal. Cuando el aire se localiza en la vía biliar, éste se sitúa en una posición más central del hígado debido al flujo centrípeto de la bilis. La TC tiene mayor sensibilidad que la radiografía abdominal en la detección de GVPH, además de identificar con mayor precisión la causa subyacente. La ecografía abdominal mostrará múltiples imágenes hiperecogénicas con sombra acústica, inconstantes 9 . La identificación de GVPH es un signo radiológico que inicialmente no diagnostica una enfermedad específica. El tratamiento de los pacientes con GVPH debería estar dirigido a la enfermedad de base. Así, la indicación de cirugía debe realizarse en pacientes con enfermedades causales no isquémicas que no responden al tratamiento conservador, enfermedades isquémicas y, especialmente, en las que presentan signos de perforación, peritonitis o sepsis abdominal 9,10 .

Research paper thumbnail of Pericarditis aguda secundaria al tratamiento con mesalazina

Gastroenterología y Hepatología, 2010

Research paper thumbnail of Esquistosomiasis intestinal

Gastroenterología y Hepatología, 2009

casos, publicado por Sookoian et al 2 , sugería un espectro clínico heterogéneo, que oscila entre... more casos, publicado por Sookoian et al 2 , sugería un espectro clínico heterogéneo, que oscila entre eccema, dermatitis psoriasiforme, erupción liquenoide (en 3 pacientes) y eritema. Posteriormente, Manjón-Haces et al 3 encontraron un predominio de lesiones eccematosas en 16 de 27 pacientes infectados por el VHC tratados con interferón y ribavirina, pero sólo 2 de los 27 presentaban una erupción liquenoide. El estudio histológico mostró una dermatitis perivascular superficial con espongiosis. Dereure 4 en su serie de 20 pacientes y Kerl 5 en su serie de 36 pacientes describieron un patrón clínico e histopatológico uniforme caracterizado por un infiltrado perivascular superficial inespecífico con espongiosis y vesiculación, presentándose clínicamente como lesiones eccematosas. Ninguno de estos pacientes presentó lesiones liquenoides. En todas estas series, las lesiones empezaron a manifestarse al cabo de una media de 2 semanas, con un rango que oscilaba entre los 5 días y los 8 meses.

Research paper thumbnail of Assessment of a Footstep Biometric Verification System

Advances in Pattern Recognition, 2009

... Verification System Rubén Vera Rodrıguez, John SD Mason, and Nicholas WD Evans ... RV Rodrıgu... more ... Verification System Rubén Vera Rodrıguez, John SD Mason, and Nicholas WD Evans ... RV Rodrıguez (B) Swansea University, Singleton Park, Swansea, SA2 8PP, UK, e-mail: r.vera-rodriguez.405831@swansea.ac.uk M. Tistarelli et al. ...

Research paper thumbnail of Footstep Recognition for a Smart Home Environment

This paper reports some experiments which assess the potential use of a footstep biometric verifi... more This paper reports some experiments which assess the potential use of a footstep biometric verification system for a smart home environment. We present a semi-automatic capture system and report results on a database with independent development and evaluation datasets comprised of more than 3500 footsteps collected from 55 persons. We present an optimisation of geometric and holistic feature extraction approaches. An equal error rate of 13% is obtained with holistic features classified with a support vector machine. The database is freely available to the research community.

Research paper thumbnail of AN EXPERIMENTAL STUDY ON THE FEASIBILITY OF FOOTSTEPS AS A BIOMETRIC

Page 1. AN EXPERIMENTAL STUDY ON THE FEASIBILITY OF FOOTSTEPS AS A BIOMETRIC Ruben Vera Rodriguez... more Page 1. AN EXPERIMENTAL STUDY ON THE FEASIBILITY OF FOOTSTEPS AS A BIOMETRIC Ruben Vera Rodriguez1, Nicholas WD Evans1,2, Richard P. Lewis1, Benoit Fauve1 and John SD Mason1 1School of Engineering ...

Research paper thumbnail of Thoracoscopic Lobectomy in Infants Less Than 10 kg with Prenatally Diagnosed Cystic Lung Disease

Journal of Laparoendoscopic & Advanced Surgical Techniques, 2011

Thoracoscopic lobectomy for congenital cystic lung lesions is an accepted technique in pediatric ... more Thoracoscopic lobectomy for congenital cystic lung lesions is an accepted technique in pediatric surgery. Since an increasing number of these lesions are detected prenatally, the safety and efficacy of infant resections have been questioned. We reviewed our experience over a 10-year period to evaluate early resection of these lesions. From January 2001 to August 2009, 75 patients under 1 year of age and weighing &amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;lt;10 kg underwent thoracoscopic lobectomy at two institutions. Patients carried the following diagnoses: 52 had congenital cystic adenomatoid malformation, 20 had bronchopulmonary sequestration, and 3 had congenital lobar emphysema. All lesions were confirmed after birth by computed tomography scan. Patient age at operation ranged from 4 days to 11 months and patient weight from 3.1 to 10 kg. Seventy-four of 75 lobectomies were thoracoscopically completed. There were 16 upper lobectomies, 1 middle lobectomy, and 55 lower lobectomies. Operative time ranged from 45 to 225 minutes. Hospital length of stay ranged from 1 to 5 days. A subset of 26 patients had surgery younger than 3 months of age and &amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;lt;5 kg, despite being asymptomatic. Their operative time averaged 90 minutes, and mean length of hospital stay was 1.5 days. Thoracoscopic lobectomy is safe for infants &amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;lt;10 kg and avoids the morbidity associated with thoracotomy. Operating early on younger patients may avoid the inflammatory changes associated with both clinically apparent and subclinical infections, even in patients weighing &amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;lt;5 kg. This may make the procedures less technically challenging and may result in lower complication and conversion rates.

Research paper thumbnail of Pancreatic Fistula Rates After 462 Distal Pancreatectomies: Staplers Do Not Decrease Fistula Rates

Journal of Gastrointestinal Surgery, 2008

Introduction Pancreatic fistula is a major source of morbidity after distal pancreatectomy (DP). ... more Introduction Pancreatic fistula is a major source of morbidity after distal pancreatectomy (DP). We reviewed 462 consecutive patients undergoing DP to determine if the method of stump closure impacted fistula rates. Methods A retrospective review of clinicopatologic variables of patients who underwent DP between February 1994 and February 2008 was performed. The International Study Group classification for pancreatic fistula was utilized (Bassi et al., Surgery, 138(1): 2005 ). Results The overall pancreatic fistula rate was 29% (133/462). DP with splenectomy was performed in 321 (69%) patients. Additional organs were resected in 116 (25%) patients. The pancreatic stump was closed with a fish-mouth suture closure in 227, of whom 67 (30%) developed a fistula. Pancreatic duct ligation did not decrease the fistula rate (29% vs. 30%). A free falciform patch was used in 108 patients, with a fistula rate of 28% (30/108). Stapled compared to stapled with staple line reinforcement had a fistula rate of 24% (10/41) vs. 33% (15/45). There is no significant difference in the rate of fistula formation between the different stump closures (p=0.73). On multivariate analysis, BMI>30 kg/m 2 , male gender, and an additional procedure were significant predictors of pancreatic fistula. Conclusions The pancreatic fistula rate was 29%. Staplers with or without staple line reinforcement do not significantly reduce fistula rates after DP. Reduction of pancreatic fistulas after DP remains an unsolved challenge.

Research paper thumbnail of Fiabilidad del eco-Doppler preoperatorio en el diseño de una estrategia terapéutica para la isquemia crónica del miembro inferior

Anales de Cirugía Vascular, 2009

Fiabilidad del eco-Doppler preoperatorio en el diseñ o de una estrategia terap eutica para la isq... more Fiabilidad del eco-Doppler preoperatorio en el diseñ o de una estrategia terap eutica para la isquemia cr onica del miembro inferior El objetivo del presente estudio fue comparar el plan de tratamiento diseñ ado en funci on de la evaluaci on preoperatoria con eco-Doppler de la isquemia cr ıtica de la extremidad con el plan de tratamiento llevado a cabo en ultimo t ermino, despu es de valorar los hallazgos obtenidos durante el tratamiento quir urgico o endovascular. Durante un per ıodo de 51 meses, se efectu o un estudio eco-Doppler preoperatorio en 335 pacientes consecutivos con isquemia cr onica cr ıtica, para diseñ ar la mejor estrategia terap eutica. El grado de concordancia entre ambos planes fue el siguiente: 80%, 82,7% y 59% en los ex amenes de las arterias il ıacas, femoropopl ıteas o tibiales, respectivamente. El plan operatorio se modific o con m as frecuencia debido al fallo del eco-Doppler en procedimientos relacionados con vasos distales (10 de 44 [22,7%], p < 0,01). En conclusi on, la evaluaci on con eco-Doppler de pacientes con enfermedad arterial oclusiva del miembro inferior permite el diseñ o de un plan de tratamiento tanto m edico como quir urgico o endovascular con un nivel elevado de concordancia con los hallazgos obtenidos durante el procedimiento de revascularizaci on.