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1.
Acta Physiol (Oxf) ; 217(2): 141-51, 2016 06.
Artículo en Inglés | MEDLINE | ID: mdl-26663034

RESUMEN

AIM: High-fat diets are known to contribute to the development of obesity and related co-morbidities including non-alcoholic fatty liver disease (NAFLD). The accumulation of hepatic lipid may increase endoplasmic reticulum (ER) stress and contribute to non-alcoholic steatohepatitis and metabolic disease. We hypothesized that bariatric surgery would counter the effects of a high-fat diet (HFD) on obesity-associated NAFLD. METHODS: Sixteen of 24 male Sprague Dawley rats were randomized to Sham (N = 8) or Roux-en-Y gastric bypass (RYGB) surgery (N = 8) and compared to Lean controls (N = 8). Obese rats were maintained on a HFD throughout the study. Insulin resistance (HOMA-IR), and hepatic steatosis, triglyceride accumulation, ER stress and apoptosis were assessed at 90 days post-surgery. RESULTS: Despite eating a HFD for 90 days post-surgery, the RYGB group lost weight (-20.7 ± 6%, P < 0.01) and improved insulin sensitivity (P < 0.05) compared to Sham. These results occurred with no change in food intake between groups. Hepatic steatosis and ER stress, specifically glucose-regulated protein-78 (Grp78, P < 0.001), X-box binding protein-1 (XBP-1) and spliced XBP-1 (P < 0.01), and fibroblast growth factor 21 (FGF21) gene expression, were normalized in the RYGB group compared to both Sham and Lean controls. Significant TUNEL staining in liver sections from the Obese Sham group, indicative of accelerated cell death, was absent in the RYGB and Lean control groups. Additionally, fasting plasma glucagon like peptide-1 was increased in RYGB compared to Sham (P < 0.02). CONCLUSION: These data suggest that in obese rats, RYGB surgery protects the liver against HFD-induced fatty liver disease by attenuating ER stress and excess apoptosis.


Asunto(s)
Dieta Alta en Grasa/efectos adversos , Estrés del Retículo Endoplásmico , Metabolismo de los Lípidos , Hígado/patología , Hígado/fisiopatología , Enfermedad del Hígado Graso no Alcohólico/prevención & control , Animales , Apoptosis , Derivación Gástrica , Masculino , Enfermedad del Hígado Graso no Alcohólico/etiología , Enfermedad del Hígado Graso no Alcohólico/fisiopatología , Ratas , Ratas Sprague-Dawley , Resultado del Tratamiento
2.
Diabetes Obes Metab ; 17(2): 198-201, 2015 Feb.
Artículo en Inglés | MEDLINE | ID: mdl-25352176

RESUMEN

Although recent studies have shown the impressive antidiabetic effects of laparoscopic Roux-en-Y gastric bypass (LRYGB), the safety profile of metabolic/diabetes surgery has been a matter of concern among patients and physicians. Data on patients with type 2 diabetes who underwent LRYGB or one of seven other procedures between January 2007 and December 2012 were retrieved from the American College of Surgeons National Surgical Quality Improvement Program database and compared. Of the 66 678 patients included, 16 509 underwent LRYGB. The composite complication rate of 3.4% after LRYGB was similar to those of laparoscopic cholecystectomy and hysterectomy. The mortality rate for LRYGB (0.3%) was similar to that of knee arthroplasty. Patients who underwent LRYGB had significantly better short-term outcomes in all examined variables than patients who underwent coronary bypass, infra-inguinal revascularization and laparoscopic colectomy. In conclusion, LRYGB can be considered a safe procedure in people with diabetes, with similar short-term morbidity to that of common procedures such as cholecystectomy and appendectomy and a mortality rate similar to that of knee arthroplasty. The mortality risk for LRYGB is one-tenth that of cardiovascular surgery and earlier intervention with metabolic surgery to treat diabetes may eliminate the need for some later higher-risk procedures to treat diabetes complications.


Asunto(s)
Diabetes Mellitus Tipo 2/cirugía , Gastroplastia/efectos adversos , Gastroplastia/mortalidad , Laparoscopía , Obesidad/cirugía , Complicaciones Posoperatorias/mortalidad , Bases de Datos Factuales , Diabetes Mellitus Tipo 2/metabolismo , Gastroplastia/métodos , Humanos , Obesidad/metabolismo , Complicaciones Posoperatorias/etiología , Resultado del Tratamiento , Estados Unidos
3.
Diabetes Obes Metab ; 16(12): 1230-8, 2014 Dec.
Artículo en Inglés | MEDLINE | ID: mdl-25132119

RESUMEN

AIM: To identify the metabolic determinants of type 2 diabetes non-remission status after bariatric surgery at 12 and 24 months. METHODS: A total of 40 adults [mean ± sd body mass index 36 ± 3 kg/m(2) , age 48 ± 9 years, glycated haemoglobin (HbA1c) 9.7 ± 2%) undergoing bariatric surgery [Roux-en-Y gastric bypass (RYGB) or sleeve gastrectomy (SG)] were enrolled in the present study, the Surgical Treatment and Medication Potentially Eradicate Diabetes Efficiently (STAMPEDE) trial. Type 2 diabetes remission was defined as HbA1c <6.5% and fasting glucose <126 mg/dl (i.e. <7 mmol/l) without antidiabetic medication. Indices of insulin secretion and sensitivity were calculated from plasma glucose, insulin and C-peptide values during a 120-min mixed-meal tolerance test. Body fat, incretins (glucagon-like polypeptide-1, gastric inhibitory peptide, ghrelin) and adipokines [adiponectin, leptin, tumour necrosis factor-α, high-sensitivity C-reactive protein (hs-CRP)] were also assessed. RESULTS: At 24 months, 37 patients had available follow-up data (RYGB, n = 18; SG, n = 19). Bariatric surgery induced type 2 diabetes remission rates of 40 and 27% at 12 and 24 months, respectively. Total fat/abdominal fat loss, insulin secretion, insulin sensitivity and ß-cell function (C-peptide0-120 /glucose0-120 × Matsuda index) improved more in those with remission at 12 and 24 months than in those without remission. Incretin levels were unrelated to type 2 diabetes remission, but, compared with those without remission, hs-CRP decreased and adiponectin increased more in those with remission. Only baseline adiponectin level predicted lower HbA1c levels at 12 and 24 months, and elevated adiponectin correlated with enhanced ß-cell function, lower triglyceride levels and fat loss. CONCLUSIONS: Smaller rises in adiponectin level, a mediator of insulin action and adipose mass, characterize type 2 diabetes non-remission up to 2 years after bariatric surgery. Adjunctive strategies promoting greater fat loss and/or raising adiponectin may be key to achieving higher type 2 diabetes remission rates after bariatric surgery.


Asunto(s)
Adiponectina/sangre , Diabetes Mellitus Tipo 2/sangre , Gastrectomía , Derivación Gástrica , Obesidad Mórbida/sangre , Pérdida de Peso , Adulto , Glucemia/metabolismo , Índice de Masa Corporal , Femenino , Estudios de Seguimiento , Hemoglobina Glucada/metabolismo , Humanos , Incretinas/metabolismo , Resistencia a la Insulina , Masculino , Persona de Mediana Edad , Obesidad Mórbida/cirugía , Estudios Prospectivos , Inducción de Remisión , Factores de Tiempo , Resultado del Tratamiento
4.
Int J Obes (Lond) ; 38(3): 364-70, 2014 Mar.
Artículo en Inglés | MEDLINE | ID: mdl-24166065

RESUMEN

OBJECTIVE: Roux-en-Y gastric bypass (RYGB) produces more durable glycemic control than sleeve gastrectomy (SG) or intensive medical therapy (IMT). However, the contribution of acylated ghrelin (AG), a gluco-regulatory/appetite hormone, to improve glucose metabolism and body composition in patients with type 2 diabetes (T2D) following RYGB is unknown. DESIGN: STAMPEDE (Surgical Treatment and Medication Potentially Eradicate Diabetes Efficiently) was a prospective, randomized controlled trial. SUBJECTS: Fifty-three (body mass index: 36±3 kg m(-2), age: 49±9 years) poorly controlled patients with T2D (HbA1c (glycated hemoglobin): 9.7±2%) were randomized to IMT, IMT+RYGB or IMT+SG and underwent a mixed-meal tolerance test at baseline, 12, and 24 months for evaluation of AG suppression (postprandial minus fasting) and beta-cell function (oral disposition index; glucose-stimulated insulin secretion × Matsuda index). Total/android body fat (dual-energy X-ray absorptiometry) was also assessed. RESULTS: RYGB and SG reduced body fat comparably (15-23 kg) at 12 and 24 months, whereas IMT had no effect. Beta-cell function increased 5.8-fold in RYGB and was greater than IMT at 24 months (P<0.001). However, there was no difference in insulin secretion between SG vs IMT at 24 months (P=0.32). Fasting AG was reduced fourfold following SG (P<0.01) and did not change with RYGB or IMT at 24 months. AG suppression improved more following RYGB than SG or IMT at 24 months (P=0.01 vs SG, P=0.07 vs IMT). At 24 months, AG suppression was associated with increased postprandial glucagon-like peptide-1 (r=-0.32, P<0.02) and decreased android fat (r=0.38; P<0.006). CONCLUSIONS: Enhanced AG suppression persists for up to 2 years after RYGB, and this effect is associated with decreased android obesity and improved insulin secretion. Together, these findings suggest that AG suppression is partly responsible for the improved glucose control after RYGB surgery.


Asunto(s)
Diabetes Mellitus Tipo 2/metabolismo , Conducta Alimentaria , Derivación Gástrica , Ghrelina/metabolismo , Obesidad Mórbida/metabolismo , Pérdida de Peso , Absorciometría de Fotón , Acilación , Fármacos Antiobesidad , Glucemia/metabolismo , Índice de Masa Corporal , Diabetes Mellitus Tipo 2/cirugía , Femenino , Hemoglobina Glucada/metabolismo , Humanos , Insulina/metabolismo , Secreción de Insulina , Masculino , Persona de Mediana Edad , Obesidad Mórbida/complicaciones , Obesidad Mórbida/cirugía , Periodo Posprandial , Estudios Prospectivos , Resultado del Tratamiento
5.
Diabetes Obes Metab ; 15(10): 963-6, 2013 Oct.
Artículo en Inglés | MEDLINE | ID: mdl-23679188

RESUMEN

Roux-en-Y gastric bypass (RYGB) surgery reverses type 2 diabetes mellitus (T2DM) in approximately 80% of patients. Ghrelin regulates glucose homeostasis, but its role in T2DM remission after RYGB surgery is unclear. Nine obese T2DM subjects underwent a mixed meal tolerance test before and at 1 and 12 months after RYGB surgery. Changes in ghrelin, body weight, glucagon-like polypeptide-1 (GLP-1, glucose tolerance and insulin sensitivity (IS) were measured. At 1 month, body weight, glycaemia and IS were improved, while ghrelin concentrations were reduced (p < 0.05). After 12 months, body weight and fasting glucose were reduced (30 and 16%, respectively; p < 0.05) and IS was enhanced (threefold; p < 0.05). Ghrelin suppression improved by 32% at 12 months (p < 0.05), and this was associated with weight loss (r = 0.72, p = 0.03), enhanced IS (r = -0.78, p = 0.01) and peak postprandial GLP-1 (r = -0.73, p = 0.03). These data suggest that postprandial ghrelin suppression may be part of the mechanism that contributes to diabetes remission after RYGB surgery.


Asunto(s)
Diabetes Mellitus Tipo 2/cirugía , Derivación Gástrica , Ghrelina/sangre , Resistencia a la Insulina , Insulina/metabolismo , Obesidad Mórbida/cirugía , Inducción de Remisión , Pérdida de Peso , Adulto , Glucemia/metabolismo , Diabetes Mellitus Tipo 2/sangre , Diabetes Mellitus Tipo 2/fisiopatología , Femenino , Índice Glucémico , Humanos , Masculino , Obesidad Mórbida/sangre , Obesidad Mórbida/fisiopatología , Factores de Tiempo , Resultado del Tratamiento
6.
Curr Atheroscler Rep ; 14(6): 579-87, 2012 Dec.
Artículo en Inglés | MEDLINE | ID: mdl-23054661

RESUMEN

Obesity is associated with a variety of weight-related metabolic comorbidities. Bariatric surgery (metabolic/gastrointestinal surgery) not only achieves significant and sustainable weight loss, but also induces extraordinary effects on nearly all obesity-related comorbidities, particularly remission of type 2 diabetes mellitus (T2DM). The mechanisms underlying such effects are slowly being elucidated, and it appears that the metabolic benefits of bariatric surgery are not only attributable to weight loss, but there are also weight independent mechanisms at play. This article outlines the metabolic effects of the most commonly performed bariatric procedures, with a particular emphasis on how they affect glucose metabolism and T2DM.


Asunto(s)
Cirugía Bariátrica/métodos , Diabetes Mellitus Tipo 2/cirugía , Hiperglucemia/complicaciones , Obesidad/cirugía , Pérdida de Peso/fisiología , Diabetes Mellitus Tipo 2/complicaciones , Humanos , Hiperglucemia/sangre , Metaanálisis como Asunto , Obesidad/complicaciones
7.
Int J Obes (Lond) ; 35 Suppl 3: S16-21, 2011 Sep.
Artículo en Inglés | MEDLINE | ID: mdl-21912381

RESUMEN

This article focuses on recent trends and outcomes of bariatric surgery. The outcomes discussed include perioperative morbidity and mortality, weight loss, long-term complications and the impact of bariatric surgery on comorbidities, cardiovascular risk and mortality.


Asunto(s)
Cirugía Bariátrica , Obesidad Mórbida/cirugía , Hemorragia Posoperatoria , Cirugía Bariátrica/efectos adversos , Cirugía Bariátrica/mortalidad , Cirugía Bariátrica/tendencias , Enfermedades Cardiovasculares/etiología , Enfermedades Cardiovasculares/mortalidad , Enfermedades Cardiovasculares/prevención & control , Humanos , Obesidad Mórbida/complicaciones , Hemorragia Posoperatoria/mortalidad , Factores de Riesgo , Resultado del Tratamiento , Estados Unidos/epidemiología , Pérdida de Peso
8.
Surgeon ; 9(5): 273-7, 2011 Oct.
Artículo en Inglés | MEDLINE | ID: mdl-21843822

RESUMEN

Bariatric surgery is well established as a safe and effective treatment for morbid obesity and related metabolic diseases. As an elective procedure, it is critical that individuals considering bariatric surgery should be carefully selected, extensively evaluated, and optimized in order to achieve optimal outcomes. This patient population has unique and challenging issues, including an extensive range of potential medical, psychiatric, and psychological comorbidities, and often patients have unrealistic expectations of the surgery. Therefore, a multidisciplinary, comprehensive and timely assessment preoperatively is of great importance. Individual bariatric units utilise different preoperative patient evaluation protocols. There is at present no uniformly accepted or recommended practice. In this article we describe what we believe are the essential components of a preoperative bariatric surgery evaluation, with supporting evidence for each recommendation. We also present a protocol currently in practice at a high volume bariatric center of excellence; the Bariatric and Metabolic Institute in the Cleveland Clinic, Ohio.


Asunto(s)
Cirugía Bariátrica , Protocolos Clínicos , Obesidad Mórbida/cirugía , Cuidados Preoperatorios , Humanos
9.
Int J Obes (Lond) ; 34(3): 462-71, 2010 Mar.
Artículo en Inglés | MEDLINE | ID: mdl-20029383

RESUMEN

CONTEXT: Hyperglycemia resolves quickly after bariatric surgery, but the underlying mechanism and the most effective type of surgery remains unclear. OBJECTIVE: To examine glucose metabolism and beta-cell function in patients with type 2 diabetes mellitus (T2DM) after two types of bariatric intervention; Roux-en-Y gastric bypass (RYGB) and gastric restrictive (GR) surgery. DESIGN: Prospective, nonrandomized, repeated-measures, 4-week, longitudinal clinical trial. PATIENTS: In all, 16 T2DM patients (9 males and 7 females, 52+/-14 years, 47+/-9 kg m(-2), HbA1c 7.2+/-1.1%) undergoing either RYGB (N=9) or GR (N=7) surgery. OUTCOME MEASURES: Glucose, insulin secretion, insulin sensitivity at baseline, and 1 and 4 weeks post-surgery, using hyperglycemic clamps and C-peptide modeling kinetics; glucose, insulin secretion and gut-peptide responses to mixed meal tolerance test (MMTT) at baseline and 4 weeks post-surgery. RESULTS: At 1 week post-surgery, both groups experienced a similar weight loss and reduction in fasting glucose (P<0.01). However, insulin sensitivity increased only after RYGB, (P<0.05). At 4 weeks post-surgery, weight loss remained similar for both groups, but fasting glucose was normalized only after RYGB (95+/-3 mg 100 ml(-1)). Insulin sensitivity improved after RYGB (P<0.01) and did not change with GR, whereas the disposition index remained unchanged after RYGB and increased 30% after GR (P=0.10). The MMTT elicited a robust increase in insulin secretion, glucagon-like peptide-1 (GLP-1) levels and beta-cell sensitivity to glucose only after RYGB (P<0.05). CONCLUSION: RYGB provides a more rapid improvement in glucose regulation compared with GR. This improvement is accompanied by enhanced insulin sensitivity and beta-cell responsiveness to glucose, in part because of an incretin effect.


Asunto(s)
Cirugía Bariátrica/métodos , Glucemia/metabolismo , Diabetes Mellitus Tipo 2/metabolismo , Péptido 1 Similar al Glucagón/metabolismo , Células Secretoras de Insulina/metabolismo , Obesidad Mórbida/cirugía , Índice de Masa Corporal , Peso Corporal , Diabetes Mellitus Tipo 2/cirugía , Femenino , Derivación Gástrica/métodos , Hormonas Gastrointestinales/metabolismo , Humanos , Insulina/sangre , Resistencia a la Insulina , Masculino , Persona de Mediana Edad , Obesidad Mórbida/metabolismo , Estudios Prospectivos , Pérdida de Peso
10.
Surg Obes Relat Dis ; 3(5): 503-7, 2007.
Artículo en Inglés | MEDLINE | ID: mdl-17903770

RESUMEN

BACKGROUND: Longstanding morbid obesity can be associated with severe cardiomyopathy. However, the safety and efficacy of bariatric surgery in patients with severe cardiomyopathy has not been studied, and the effect of surgical weight loss on postoperative cardiac function is also unknown. In addition, morbidly obese patients have significantly increased mortality associated with cardiac transplantation, often precluding them from becoming recipients. METHODS: A retrospective study of patients with a left ventricular ejection fraction < or =35% who underwent bariatric surgery (1998-2005) was performed. Short-term morbidity/mortality, length of stay, excess weight loss, pre- and postoperative left ventricular ejection fraction, and New York Heart Association (NYHA) functional class were assessed. RESULTS: A total of 14 patients (10 men and 4 women) with a mean preoperative body mass index of 50.8 +/- 2.04 kg/m(2) underwent bariatric surgery (10 underwent laparoscopic Roux-en-Y gastric bypass, 1 open Roux-en-Y gastric bypass, 2 sleeve gastrectomy, and 1 laparoscopic gastric banding). The complications were pulmonary edema in 1, hypotension in 1, and transient renal insufficiency in 2. The median length of stay was 3.0 days (range 2-9). The mean excess weight loss at 6 months was 50.4%, with a decrease in the mean body mass index from 50.8 +/- 2.04 kg/m(2) to 36.8 +/- 1.72 kg/m(2). The mean left ventricular ejection fraction at 6 months had significantly improved from 23% +/- 2% to 32% +/- 4% (P = .04), correlating with improved functional capacity, as measured by the NYHA classification. Preoperatively, 2 patients (14%) had an NYHA classification of IV, 6 (43%) a classification of III, and 6 (43%) a classification of II. At 6 months postoperatively, no patient had an NYHA classification of IV, 2 (14%) had a classification of III, and 12 (86%) an NYHA classification of II. Two patients had undergone cardiac transplant evaluations preoperatively and underwent successful transplantation after weight loss. CONCLUSION: The results of our study have shown that bariatric surgery for patients with cardiomyopathy is feasible and effective. Surgically induced weight loss results in both subjective and objective improvement in cardiac function. In addition, surgical weight loss can provide a bridge to transplantation in patients who were prohibited secondary to their morbid obesity.


Asunto(s)
Cirugía Bariátrica , Cardiomiopatías/complicaciones , Cardiomiopatías/fisiopatología , Corazón/fisiopatología , Obesidad Mórbida/complicaciones , Obesidad Mórbida/cirugía , Adulto , Anastomosis en-Y de Roux , Cirugía Bariátrica/efectos adversos , Índice de Masa Corporal , Femenino , Derivación Gástrica , Humanos , Hipotensión/etiología , Tiempo de Internación , Masculino , Persona de Mediana Edad , Obesidad Mórbida/fisiopatología , Edema Pulmonar/etiología , Insuficiencia Renal/etiología , Estudios Retrospectivos , Índice de Severidad de la Enfermedad , Volumen Sistólico , Pérdida de Peso
11.
Surg Endosc ; 21(11): 1914-8, 2007 Nov.
Artículo en Inglés | MEDLINE | ID: mdl-17891439

RESUMEN

BACKGROUND: Intestinal obstruction is a significant and increasingly recognized complication after laparoscopic and open gastric bypass. MATERIALS AND METHODS: The medical records of 3,463 patients who had gastric bypass during the study period from July 1997 to December 2004 at a single bariatric center were evaluated. 1,120 patients had retrocolic, retrogastric Roux limb placement and 2,343 patients had antecolic, antegastric. RESULTS: 40 patients had 44 intestinal obstructions (1.27%). The onset ranged from 1 day to 7 years postoperatively (mean 16.9 months). Internal hernia at the transverse mesocolon defect was the most common cause. 36 (3.2%) obstructions were observed in retrocolic, retrogastric vs. 8 (0.3%) in antecolic, antegastric approach. Internal hernia repair at mesocolinic effect (n = 11), jejunojejunostomy mesenteric defect repair (n = 7), lysis of adhesions (n = 16) were the most common procedures. A total of 70.5% were done laparoscopically. CONCLUSIONS: A high index of suspicion is needed to diagnose bowel obstruction after gastric bypass. Radiological imaging of the abdomen has significant limitations. Surgical exploration should be performed without delay. Diagnostic laparoscopy is a safe and effective therapy. We recommend closing all mesenteric defects to prevent internal hernias. The antecolic, antegastric technique reduces the incidence of internal hernias.


Asunto(s)
Derivación Gástrica/estadística & datos numéricos , Obstrucción Intestinal/epidemiología , Obesidad Mórbida/cirugía , Adulto , Causalidad , Femenino , Derivación Gástrica/efectos adversos , Derivación Gástrica/métodos , Hernia Abdominal/epidemiología , Hernia Abdominal/etiología , Hernia Abdominal/cirugía , Humanos , Incidencia , Obstrucción Intestinal/diagnóstico , Obstrucción Intestinal/etiología , Obstrucción Intestinal/terapia , Laparoscopía/efectos adversos , Laparoscopía/métodos , Laparoscopía/estadística & datos numéricos , Masculino , Persona de Mediana Edad , Pennsylvania/epidemiología
12.
Minerva Gastroenterol Dietol ; 52(4): 415-30, 2006 Dec.
Artículo en Inglés | MEDLINE | ID: mdl-17108871

RESUMEN

In recent years, obesity has become a major public health problem in Western countries. The World Health Organization has defined obesity as a global epidemic of the third millennium. Treatment options for weight management include dietary intervention, physical activity, behavior modification, pharmacotherapy and surgery. However, the complexity of this chronic condition necessitates a coordinated multidisciplinary team-approach to the care of obese patients who fail weight control. The long-term duration of the treatment and the necessity of monitoring compliance and effectiveness should be considered. The objective of this article was to review the major controlled randomized clinical trials dealing with the different medical strategies for weight loss and its maintenance in overweight and obese patients.


Asunto(s)
Obesidad/terapia , Sobrepeso , Pérdida de Peso , Fármacos Antiobesidad/administración & dosificación , Fármacos Antiobesidad/uso terapéutico , Depresores del Apetito/administración & dosificación , Depresores del Apetito/uso terapéutico , Terapia Conductista , Índice de Masa Corporal , Ciclobutanos/administración & dosificación , Ciclobutanos/uso terapéutico , Ejercicio Físico , Estudios de Seguimiento , Humanos , Lactonas/administración & dosificación , Lactonas/uso terapéutico , Estilo de Vida , Obesidad/dietoterapia , Obesidad/tratamiento farmacológico , Obesidad/psicología , Orlistat , Cooperación del Paciente , Estudios Prospectivos , Calidad de Vida , Ensayos Clínicos Controlados Aleatorios como Asunto , Factores de Riesgo , Factores de Tiempo
13.
Surg Endosc ; 20(6): 850-4, 2006 Jun.
Artículo en Inglés | MEDLINE | ID: mdl-16738968

RESUMEN

BACKGROUND: Morbid obesity is associated with gastroesophageal reflux disease (GERD), which, in most cases, completely resolves after Roux-en-Y gastric bypass (RYGB). Patients with persistent or recurrent symptoms have limited surgical options. This study sought to evaluate the application of the Stretta procedure for patients with refractory GERD. METHODS: The medical records of all patients who underwent Stretta for refractory GERD after RYGB were reviewed. Demographic, preoperative, and postoperative reflux data were collected. Data are presented as mean +/- standard error of the mean. The t-test was used for comparison purposes. RESULTS: Of 369 patients, 7 received Stretta 27 +/- 6 months after RYGB. All were women with a mean age of 49 +/- 2 years. All the patients had experienced prebypass GERD symptoms for a duration of 45 +/- 8 months. The mean prebypass body mass index was 45 +/- 2 kg/m(2), and this was reduced to 29 +/- 2 kg/m(2) after laparoscopic RYGB (p < 0.001). Before Stretta, all patients underwent a 48-h Bravo pH study, which demonstrated reflux with a mean fraction time of 7% +/- 2% for pH lower than 4. After Stretta, five patients had complete resolution of their symptoms, with normalization of pH studies (mean fraction time of 3% +/- 0% for pH < 4). The follow-up period after Stretta was 20 +/- 2 months. One patient did not have adequate relief of symptoms after Stretta, and one patient was lost to follow-up evaluation. CONCLUSION: Stretta is a valid option in the treatment of persistent GERD for patients who have undergone gastric bypass. Further study is required to evaluate the long-term efficacy of this procedure.


Asunto(s)
Ablación por Catéter , Derivación Gástrica , Reflujo Gastroesofágico/etiología , Reflujo Gastroesofágico/cirugía , Laparoscopía , Obesidad Mórbida/complicaciones , Obesidad Mórbida/cirugía , Adulto , Femenino , Estudios de Seguimiento , Reflujo Gastroesofágico/metabolismo , Humanos , Concentración de Iones de Hidrógeno , Persona de Mediana Edad , Recurrencia , Reoperación , Resultado del Tratamiento
14.
Surg Endosc ; 20(6): 929-33, 2006 Jun.
Artículo en Inglés | MEDLINE | ID: mdl-16738985

RESUMEN

BACKGROUND: This study was designed to evaluate the impact of a 2-day laparoscopic bariatric workshop on the practice patterns of participating surgeons. METHODS: From October 1998 to June 2002, 18 laparoscopic bariatric workshops were attended by 300 surgeons. Questionnaires were mailed to all participants. RESULTS: Responses were received from 124 surgeons (41%), among whom were 56 bariatric surgeons (open) (45%), 30 advanced laparoscopic surgeons (24%), and 38 surgeons who performed neither bariatric nor advanced laparoscopic surgery (31%). The questionnaire responses showed that 46 surgeons (37%) currently are performing laparoscopic gastric bypass (LGB), 38 (31%) are performing open gastric bypass, and 39 (32%) are not performing bariatric surgery. Since completion of the course, 46 surgeons have performed 8,893 LGBs (mean, 193 cases/surgeon). Overall, 87 of the surgeons (70%) thought that a limited preceptorship was necessary before performance of LGB, yet only 25% underwent this additional training. According to a poll, the respondents thought that, on the average, 50 cases (range, 10-150 cases) are needed for a claim of proficiency. CONCLUSION: Laparoscopic bariatric workshops are effective educational tools for surgeons wishing to adopt bariatric surgery. Open bariatric surgeons have the highest rates of adopting laparoscopic techniques and tend to participate in more adjunctive training before performing LGB. There was consensus that the learning curve is steep, and that additional training often is necessary. The authors propose a mechanism for post-residency skill acquisition for advanced laparoscopic surgery.


Asunto(s)
Cirugía Bariátrica , Congresos como Asunto , Educación Médica Continua/métodos , Cirugía General , Laparoscopía , Obesidad Mórbida/cirugía , Pautas de la Práctica en Medicina , Cirugía General/educación , Humanos , Aprendizaje
15.
Surg Endosc ; 19(5): 621-7, 2005 May.
Artículo en Inglés | MEDLINE | ID: mdl-15759195

RESUMEN

The rising popularity of bariatric surgery over the past several years is attributable in part to the development of laparoscopic bariatric surgery. Morbidly obese patients have associated comorbid conditions that may predispose them to postoperative morbidity. The laparoscopic approach to bariatric surgery offers a minimally invasive option that reduces the physiologic stress and provides clinical benefits, as compared with the open approach. This review summarizes the impact of laparoscopic surgery on bariatric surgery, the various risk factors that could potentially predispose morbidly obese patients to postoperative morbidity, the fundamental differences between laparoscopic and open bariatric surgery, and the physiology of reduced tissue injury associated with laparoscopic bariatric surgery.


Asunto(s)
Cirugía Bariátrica/métodos , Laparoscopía/métodos , Cirugía Bariátrica/efectos adversos , Cirugía Bariátrica/estadística & datos numéricos , Factores de Coagulación Sanguínea/análisis , Dióxido de Carbono/administración & dosificación , Dióxido de Carbono/efectos adversos , Comorbilidad , Diabetes Mellitus Tipo 2/fisiopatología , Humanos , Inflamación , Laparoscopía/efectos adversos , Laparoscopía/estadística & datos numéricos , Laparotomía/efectos adversos , Laparotomía/métodos , Pulmón/fisiopatología , Procedimientos Quirúrgicos Mínimamente Invasivos , Obesidad Mórbida/metabolismo , Obesidad Mórbida/fisiopatología , Obesidad Mórbida/cirugía , Neumoperitoneo Artificial/efectos adversos , Complicaciones Posoperatorias/epidemiología , Complicaciones Posoperatorias/metabolismo , Complicaciones Posoperatorias/fisiopatología , Embolia Pulmonar/epidemiología , Embolia Pulmonar/etiología , Embolia Pulmonar/prevención & control , Factores de Riesgo , Infección de la Herida Quirúrgica/epidemiología , Infección de la Herida Quirúrgica/prevención & control , Trombofilia/tratamiento farmacológico , Trombofilia/etiología , Trombosis/epidemiología , Trombosis/etiología , Trombosis/prevención & control
16.
Surg Endosc ; 18(2): 207-10, 2004 Feb.
Artículo en Inglés | MEDLINE | ID: mdl-14691700

RESUMEN

BACKGROUND: There is no consensus regarding the optimal treatment of ventral hernias in patients who present for weight loss surgery. METHODS: Medical records of consecutive morbidly obese patients who underwent laparoscopic Roux-en-Y (LRYGB) gastric bypass with a secondary diagnosis of ventral hernia were reviewed. Only patients who were beyond 6 months of follow-up were included. RESULTS: The study population was 85 patients. There were three groups of patients according to the method of repair: primary repair (59), small intestine submucosa (SIS) (12), and deferred treatment (14). Average follow-up was 26 months. There was a 22% recurrence in the primary repair group. There were no recurrences in the SIS group. Five of the patients in the deferred treatment group (37.5%) presented with small bowel obstruction due to incarceration. CONCLUSION: Biomaterial mesh (SIS) repair of ventral hernias concomitant with LRYGB resulted in the most favorable outcome albeit having short follow-up. Concomitant primary repair is associated with a high rate of recurrence. All incarcerated ventral hernias should be repaired concomitant with LRYGB, as deferment may result in small bowel obstruction.


Asunto(s)
Derivación Gástrica , Gastroplastia , Hernia Umbilical/cirugía , Hernia Ventral/cirugía , Laparoscopía , Obesidad Mórbida/cirugía , Implantación de Prótesis , Adulto , Anastomosis en-Y de Roux , Índice de Masa Corporal , Bases de Datos Factuales , Urgencias Médicas , Femenino , Estudios de Seguimiento , Gastroplastia/métodos , Hernia Umbilical/complicaciones , Hernia Ventral/complicaciones , Humanos , Obstrucción Intestinal/etiología , Obstrucción Intestinal/prevención & control , Obstrucción Intestinal/cirugía , Intestino Delgado/cirugía , Intestinos/irrigación sanguínea , Isquemia/etiología , Isquemia/prevención & control , Laparoscopía/métodos , Tiempo de Internación/estadística & datos numéricos , Masculino , Persona de Mediana Edad , Obesidad Mórbida/complicaciones , Complicaciones Posoperatorias/etiología , Complicaciones Posoperatorias/cirugía , Prótesis e Implantes , Implantación de Prótesis/métodos , Implantación de Prótesis/estadística & datos numéricos , Recurrencia , Estrés Mecánico , Mallas Quirúrgicas , Técnicas de Sutura , Factores de Tiempo
17.
Surg Endosc ; 18(11): 1620-4, 2004 Nov.
Artículo en Inglés | MEDLINE | ID: mdl-15931477

RESUMEN

BACKGROUND: The adoption of advanced laparoscopic techniques for complex surgical procedures has raised the concern that the leak rate might be higher than for open surgery, particularly in the surgeon's early experience or in difficult cases. In this study, the sealing effect of fibrin glue on leaking gastrointestinal anastomoses was evaluated in an experimental swine model. METHODS: A standardized gastrojejunostomy was performed on 20 female pigs (mean weight, 47.7 +/- 5.7 kg). A leak was created on the anterior surface of the anastomosis. The animals were randomized to either fibrin glue or no treatment of the leak. Clinical conditions and vital signs, including body temperature, heart rate and, respiratory rate, were collected three times a day. Preoperative and postoperative complete and differential blood count and lactate dehydrogenase levels were determined. Postmortem analysis was performed when the animals were killed. RESULTS: Clinical signs of peritonitis developed in the control animals by the second or third postoperative day. Findings that confirmed the presence of an anastomotic leak at the postmortem examination were the presence of food or gastrojejunal juices in the abdominal cavity, a localized abscess, or a positive air leak test. Fibrin glue treatment prevented the development of peritonitis in all the animals. Complete sealing of the leak was observed on postoperative day 7 in all treated animals, except one in which an asymptomatic contained leak developed. The postoperative total white blood count was significantly increased in the untreated group (24.69 +/- 5.5 vs 12.74 +/- 3.7 10(3)/ul p < 0.001, paired t-test), as compared with the treated group (15. 55 +/- 2.4 vs 14.89 +/- 2.7 10(3)/ul; p = 0.24). CONCLUSION: In this study, fibrin glue showed reproducible sealing effects on leaking gastrojejunal anastomoses. Fibrin glue application may be a valuable approach for the treatment of gastrointestinal anastomotic leaks.


Asunto(s)
Endoscopía Gastrointestinal , Adhesivo de Tejido de Fibrina , Gastrostomía/efectos adversos , Intestinos/cirugía , Yeyunostomía/efectos adversos , Estómago/cirugía , Adhesivos Tisulares , Cicatrización de Heridas , Animales , Femenino , Complicaciones Posoperatorias/terapia , Porcinos
18.
Surg Endosc ; 16(9): 1264-6, 2002 Sep.
Artículo en Inglés | MEDLINE | ID: mdl-12235506

RESUMEN

BACKGROUND: Speech recognition technology is a recent development in minimally invasive surgery. This study was designed to assess the impact of HERMES on operating room efficiency and user satisfaction. METHODS: Patients undergoing laparoscopic antireflux operations by surgeons experienced in minimally invasive surgery were randomized to HERMES-assisted or standard laparoscopic operations. The variables of interest were circulating nurse's time spent adjusting devices that are voice-controlled by HERMES, number of adjustments to devices requested, and surgeon and nurse satisfaction measured on a scale from 1 (dissatisfied) to 10 (satisfied). RESULTS: A total of 30 cases were studied. In the non-HERMES cases, nurses were interrupted to make device adjustments an average of 15.3 times per case versus 0.33 times per case in the with-HERMES cases (p < 0.01). The interruptions during the non-HERMES cases averaged 4.35 min per case versus 0.16 min per case in the with-HERMES cases (p = 0.03). Average satisfaction scores for HERMES operations as opposed to non-HERMES operations were 9.2 versus 5.3 for nurses (p < 0.01) and 9.0 versus 5.1 for surgeons (p < 0.01). CONCLUSIONS: Physician and nurse acceptance of HERMES was very high because of the smoother interruption-free environment.


Asunto(s)
Reflujo Gastroesofágico/cirugía , Laparoscopía/métodos , Interfaz Usuario-Computador , Fundoplicación/instrumentación , Fundoplicación/métodos , Fundoplicación/enfermería , Humanos , Satisfacción en el Trabajo , Laparoscopía/enfermería , Robótica/métodos , Programas Informáticos , Cirugía Asistida por Computador/métodos , Factores de Tiempo , Voz
19.
Surg Endosc ; 16(6): 905-8, 2002 Jun.
Artículo en Inglés | MEDLINE | ID: mdl-12163952

RESUMEN

BACKGROUND: Recent reports suggest that partial fundoplications such as the laparoscopic Toupet (LT) ultimately suffer from a higher recurrence rate compared to complete wraps such as the laparoscopic Nissen fundoplication (LNF). This article summarizes our experience with LT and LNF. METHODS: Over a 45-month period (February 1995 to November 1998), 206 patients underwent laparoscopic antireflux operations. The LNF group included 163 patients and the LT group included 43 patients. Global quality of life was measured using the Medical outcomes short form 36 (SF36). RESULTS: There were no differences in disease severity, except that the LT group had a higher incidence of esophageal dysmotility (37.2% 8.6%, p < 0.05). Early outcomes were similar, with no perioperative deaths and morbidity occurring in 15 (9.2%) LNF and 5 (11.6%) LT patients (p = not significant). Long-term follow-up was available in 142 patients at a mean of 19.7 months. A greater number of LT patients required proton pump inhibitors (38 vs 20%) and were dissatisfied (21 vs 7%) with their surgery (p < 0.05). SF36 physical function scores were better in the LNF group (85 vs 74; p < 0.05). Significantly more (p < 0.05) of the LT patients complained of dysphagia (34.5 vs 15%) on follow-up. There were no differences in the incidence of symptoms related to the gas-bloat syndrome. The observed differences between the LT and LNF groups did not appear to be related to differences in esophageal motility. CONCLUSIONS: Short-term results were similar for LT and LNF, but with longer follow-up, better results were seen with LNF. Even in the setting of moderate decreases of esophageal motility, complete fundoplication yields superior results.


Asunto(s)
Fundoplicación , Reflujo Gastroesofágico/cirugía , Laparoscopía , Calidad de Vida , Adulto , Anciano , Femenino , Estudios de Seguimiento , Fundoplicación/efectos adversos , Humanos , Laparoscopía/efectos adversos , Tiempo de Internación , Masculino , Persona de Mediana Edad , Resultado del Tratamiento
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