Resultados del registro nacional de pacientes diagnosticados de enfermedad inflamatoria intestinal candidatos a cirugía bariátrica (ReNacEIBar) / Results of the national registry of patients diagnosed with inflammatory bowel disease candidates for bariatric surgery (ReNacEIBar)

Introducción: El objetivo principal es realizar un Registro Nacional de pacientes diagnosticados de enfermedad inflamatoria intestinal (EII) que son sometidos a cirugía bariátrica, así como evaluar los resultados y aspectos fundamentales del manejo de este tipo de pacientes en la práctica clínica habitual. Metodología: Estudio retrospectivo observacional multicéntrico nacional, en el que se incluyen pacientes diagnosticados previamente de EII, que hayan sido intervenidos de cirugía bariátrica desde enero de 2000 hasta diciembre de 2022. Resultados: Se han incluido un total de 41 pacientes: 43,9% diagnosticados previamente de colitis ulcerosa (CU), 53,7% de enfermedad de Crohn (EC), y una colitis indeterminada (2,4%). El índice de masa corporal (IMC) preoperatorio ha sido de 45,8 ± 6,1 kg/m2. Se han realizado 31 (75,6%) gastrectomías verticales, un (2,4%) bypass gástrico y nueve (22%) bypass gástrico de una anastomosis. Se han registrado 9,8% de complicaciones. A los 12 meses, el IMC medio fue de 29,5 ± 4,7 kg/m2, presentando en un porcentaje de peso total perdido (%PTP) de 33,9 ± 9,1%. Conclusiones: La cirugía bariátrica en pacientes previamente diagnosticados de EII se puede considerar eficaz en cuanto a pérdida de peso, y segura en relación con un porcentaje bajo de complicaciones.(AU)

Background: Our aim is to carry out a national registry of patients with inflammatory bowel disease (IBD) who underwent bariatric surgery, as well as evaluate the results and management of this type of patients in the usual clinical practice. Methods: National multicentric observational retrospective study, including patients, previously diagnosed with IBD who underwent bariatric surgery from January 2000 to December 2022. Results: Forty-one patients have been included: 43.9% previously diagnosed with ulcerative colitis, 57.3% Crohn's disease, and an indeterminate colitis (2.4%). The preoperative BMI was 45.8 ± 6.1 kg/m2. Among the bariatric surgeries, 31 (75.6%) sleeve gastrectomy, 1 (2.4%) gastric bypass and 9 (22%) one anastomosis gastric have been carried out. During the postoperative period, 9.8% complications have been recorded. BMI was 29.5 ± 4.7 kg/m2 and percent total weight lost was 33.9 ± 9.1% at 12 months. Conclusions: Bariatric surgery in patients with inflammatory bowel disease can be considered safe and effective.(AU)

Results of the national registry of patients diagnosed with inflammatory bowel disease candidates for bariatric surgery (ReNacEIBar).

BACKGROUND: Our aim is to carry out a national registry of patients with inflammatory bowel disease (IBD) who underwent bariatric surgery, as well as evaluate the results and management of this type of patients in the usual clinical practice. METHODS: National multicentric observational retrospective study, including patients, previously diagnosed with IBD who underwent bariatric surgery from January 2000 to December 2022. RESULTS: Forty-one patients have been included: 43,9% previously diagnosed with ulcerative colitis, 57,3% Crohn's disease, and an indeterminate colitis (2,4%). The preoperative BMI was 45.8 ± 6,1 kg/m2. Among the bariatric surgeries, 31 (75,6%) sleeve gastrectomy, 1 (2,4%) gastric bypass and 9 (22%) one anastomosis gastric have been carried out. During the postoperative period, 9.8% complications have been recorded. BMI was 29,5 ± 4,7 kg/m2 and percent total weight lost was 33,9 ± 9,1% at 12 months. CONCLUSIONS: Bariatric surgery in patients with inflammatory bowel disease can be considered safe and effective.

Duodenal Switch vs. Single-Anastomosis Duodenal Switch (SADI-S) for the Treatment of Grade IV Obesity: 5-Year Outcomes of a Multicenter Prospective Cohort Comparative Study.

PURPOSE: The aims were to compare the 5-year outcomes of duodenal switch (DS) and single-anastomosis duodenal switch (SADI-S) in terms of weight loss; remission of comorbidities; nutritional status short- and long-term complications; postoperative mortality; and need for revisional surgery. MATERIALS AND METHODS: Multicenter prospective observational study of all consecutive patients undergoing DS or SADI-S in three high-volume hospitals. RESULTS: A total of 87 patients were included in the study, 43 submitted to DS and 44 to SADI-S, with similar basal characteristics, nutritional parameters, and BMI (52.9 kg/m2 DS vs. 52.5 kg/m2 SADI-S). Operative time was 152 min (± 32.6) in DS vs. 116 min (± 21.9) in SADI-S (p = 0.043). Short-term complications were similar for DS and SADI-S, both overall (11.8% vs. 11.6%), and ranged as Clavien-Dindo > II (4.5% vs. 4.7%), with no mortality. At 5 years, DS and SADI-S results were as follows: BMI 30.6 vs. 33.3 kg/m2 (p = 0.023); %EWL 80.5% vs. 68.6% (p = 0.006); and %TWL 42.1 vs. 36.0 (p = 0.006). Comorbidity remission rates for DS and SADI-S were as follows: for diabetes, 92.8% vs. 85.7% (n.s.); for hypertension, 95.2% vs. 85.1% (n.s.); for sleep apnea, 75% vs. 73.3% (n.s.); and for dyslipidemia, 76.4% vs. 73.3% (n.s.). DS showed lower levels of vitamin B12, iron, vitamin E, and zinc than SADI-S (p = < 0.005). In the long term, there were 4 surgical reinterventions (due to 1 internal hernia in the DS group and 1 internal hernia and 2 biliary refluxes in the SADI-S group) with no cases of persistent diarrhea or malnutrition. CONCLUSION: Both DS and SADI-S allowed good weight control and resolution of comorbidities. DS achieved a greater weight loss compared to SADI-S, at the expense of longer operative time and lower vitamin and mineral levels.

Single- Versus Double-Anastomosis Duodenal Switch: Outcomes Stratified by Preoperative BMI.

PURPOSE: Describe and analyze the safety and weight loss performance of biliopancreatic diversion and duodenal switch (BPD-DS) and single-anastomosis duodeno-ileal bypass with sleeve gastrectomy (SADI-S), verifying any possible superiority according to preoperative BMI. METHODS: Retrospective review of patients who underwent primary SADI-S or BPD-DS in three bariatric centers. Study groups were further stratified according to preoperative BMI (subgroup 1: BMI < 50; subgroup 2: 50 ≤ BMI < 55; subgroup 3: BMI ≥ 55). RESULTS: Four hundred and sixty patients underwent BPD-DS (n = 220) or SADI-S (n = 240). The mean LOS was 3.48 ± 3.7 and 3.13 ± 2.3 days for BPD-DS and SADI-S respectively (p = 0.235). The mean operative time was shorter in the SADI-S group (167.25 ± 33.6 vs 140.85 ± 56.7 min) (p < 0.00). The mean %EWL was 44.2, 62.4, and 69.4 for the BPD-DS group and 48.4, 64.5, and 67.1 for the SADI-S group at 6, 12, and 24 months respectively. The mean %TBWL was 25, 35.9, and 40.3 for the BPD-DS group, and 26.2, 35, and 36.9 for the SADI-S group at 6, 12, and 24 months respectively. Overall complication rates were comparable between BPD-DS and SADI-S groups (14% vs 18%) (p = 0.219). SADI-S showed greater emergency department visits (17% vs 7%) (p = 0.005); similar readmission rates (6% vs 7%) (p = 0.80); similar reoperation rates (3% vs 7%) (p = 0.102); and similar mortality rate (0.9% vs 0.4%), after BPD-DS and SADI-S respectively. CONCLUSION: BPD-DS achieved greater %TBWL at 2 years, but no superiority was perceived among study subgroups. SADI-S and BPD-DS showed similar overall complication rates.

Patient Selection in One Anastomosis/Mini Gastric Bypass-an Expert Modified Delphi Consensus.

PURPOSE: One anastomosis/mini gastric bypass (OAGB/MGB) is up to date the third most performed obesity and metabolic procedure worldwide, which recently has been endorsed by ASMBS. The main criticisms are the risk of bile reflux, esophageal cancer, and malnutrition. Although IFSO has recognized this procedure, guidance is needed regarding selection criteria. To give clinicians a daily support in performing the right patient selection in OAGB/MGB, the aim of this paper is to generate clinical guidelines based on an expert modified Delphi consensus. METHODS: A committee of 57 recognized bariatric surgeons from 24 countries created 69 statements. Modified Delphi consensus voting was performed in two rounds. An agreement/disagreement among ≥ 70.0% of the experts was considered to indicate a consensus. RESULTS: Consensus was achieved for 56 statements. Remarkably, ≥ 90.0% of the experts felt that OAGB/MGB is an acceptable and suitable option "in patients with Body mass index (BMI) > 70, BMI > 60, BMI > 50 kg/m2 as a one-stage procedure," "as the second stage of a two-stage bariatric surgery after Sleeve Gastrectomy for BMI > 50 kg/m2 (instead of BPD/DS)," and "in patients with weight regain after restrictive procedures. No consensus was reached on the statement that OAGB/MGB is a suitable option in case of resistant Helicobacter pylori. This is likely as there is a concern that this procedure is associated with reflux and its related long-term complications including risk of cancer in the esophagus or stomach. Also no consensus reached on OAGB/MGB as conversional surgery in patients with GERD after restrictive procedures. Consensus for disagreement was predominantly achieved "in case of intestinal metaplasia of the stomach" (74.55%), "in patients with severe Gastro Esophageal Reflux Disease (GERD)(C,D)" (75.44%), "in patients with Barrett's metaplasia" (89.29%), and "in documented insulinoma" (89.47%). CONCLUSION: Patient selection in OAGB/MGB is still a point of discussion among experts. There was consensus that OAGB/MGB is a suitable option in elderly patients, patients with low BMI (30-35 kg/m2) with associated metabolic problems, and patients with BMIs more than 50 kg/m2 as one-stage procedure. OAGB/MGB can also be a safe procedure in vegetarian and vegan patients. Although OAGB/MGB can be a suitable procedure in patients with large hiatal hernia with concurrent hiatal hernia, it should not be offered to patients with grade C or D esophagitis or Barrett's metaplasia.

Robotic and laparoscopic Roux-en-Y gastric bypass after learning curve: 30-day and 12-month outcomes.

This study compares laparoscopic RYGB (L-RYGB) and robotic RYGB (R-RYGB) performed by the same team after the learning curve in both approaches. A retrospective cohort study was done, and the surgical outcome was analyzed in 30 days and 12 months for patients with similar characteristics and an equal number of cases in each group (233 cases). Four hundred and sixty-six patients were included in this study. Mean age was 46.8 ± 8.3 years and 2/3 were women. R-RYGB presented a longer operative time (150.7 versus 135.4 min; p < 0.001) with no differences in the length of hospital stay. The main 30-day complications were G-J stricture, leakage, and intraluminal bleeding. The reoperation rate was 1.6% by leakage (G-J anastomosis) and was higher in R-RYGB (2.1 versus 0.4; p = 0.108). The multivariate analysis identified that L-RYGB was the factor independently associated with a LOS longer than 2 days (odds ratio: 4.7, 95% CI: 2.6-8.2, p value < 0.001). At the FU time (12 months), no differences between the groups were found. The outcomes between the groups after the learning curve did not present differences in terms of 30 days and 12 months of FU when same preoperative characteristics and an equal number of cases in each group are considered. L-RYGB was the unique independent factor associated with long LOS.

Robotic Revisional Experience. Single Centre Prospective Cohort Study and Review of the Literature.

Background: Robotic bariatric surgery (RBS) has increased in recent years. Many doubts continue to exist regarding its utility in terms of postoperative complications, costs and technical aspects. RBS has increased its number and shows a more technical challenge associated with more post-operative complications compared to primary bariatric surgery. We herein present a single institution experience and review to describe its utility in revisional surgery. Methods: A retrospective review of our experience and a review of the literature has been conducted to evaluate the impact of robotic revisional surgery in the bariatric field. Results: A total of 17 patients (5 female and 12 male) were operated on. Most frequent surgery was conversion of sleeve gastrectomy to gastric bypass (n=9). No leaks were found nor severe complications. A systematic review showed similar results including a decreased number for complications when performing robotic revisional surgery. Conclusions: Revisional robotic surgery shows better results compared to standard laparoscopic revisional bariatric surgery in terms of efficacy, safety and hospital stay. No differences were seen in rates of mortality, morbidity and reintervention between both approaches. We encourage surgeons to learn to perform the robotic technique as part of the process of democratization and standardization of bariatric surgery.

Live surgery courses: retrospective safety analysis after 11 editions.

INTRODUCTION: Live surgery is a topic of interest at every meeting or course in the field of surgery. The potential of laparoscopy for live broadcasting makes it an excellent tool in continuing medical education. Surgeons who participate in live surgeries are usually experienced, but several conditions may influence the results and safety of a procedure. OBJECTIVES: To analyze safety and outcomes in a series of patients who underwent surgery in the last 10 years in a live surgery course at our institution. SETTING: University public hospital in Spain. METHODS: Retrospective review of patients who underwent surgery during these courses from 2006 to 2016. Morbidity, mortality, and long-term results were analyzed. RESULTS: Of 107 patients, 74 (68.5%) were women, and 38 (35.2%) had revision surgery. Five had surgery during previous editions. The most performed procedures were Roux-en-Y gastric bypass (38.9%), sleeve gastrectomy (16.7%), and duodenal switch (14%). Ten cases were endoscopic procedures. Morbidity was 13% (14 cases), and 6 required early postoperative revision (5.6%). Most of the complications were Clavien types III and I. Bleeding was the most common (72.4%). There was no anastomotic leak, but 1 duodenal stump leak occurred. During follow-up, 6 patients had a surgical complication and 5 required revision surgery. There was no mortality. DISCUSSION: We found higher morbidity and reoperation rates. The conversion rate in long-term follow-up was higher. Despite the educational benefits, we should take into consideration the higher risk to our patients for future editions.

Nutritional deficiencies and bone metabolism after endobarrier in obese type 2 patients with diabetes.

Endobarrier® is a minimally invasive, reversible endoscopic treatment for obesity. It provokes malabsorption along 60 cm of the small intestine, which can contribute to the development of vitamin deficiencies and to changes in bone mineral density (BMD). To determine the prevalence of nutrient deficiencies, changes in body composition and BMD during the first year after Endobarrier® placement. Twenty-one patients with type 2 diabetes met inclusion criteria. Levels of vitamins, micro and macronutrients were assessed prior and at 1, 3 and 12 months post-operatively. DEXA was performed before and 12 months after implant. Nineteen patients completed the 12 months follow-up. Vitamin D deficiency was the most prevalent finding before Endobarrier® implant. The percentage of patients with severe deficiency decreased from 19 to 5% at 12 months after supplementation. Microcytic anaemia was initially present in 9.5% of patients and increased to 26.3% at 12 months. Low ferritin and vitamin B12 levels were observed in 14.2 and 4.8% of patients before the implant and worsened to 42 and 10.5%. Low concentrations of magnesium and phosphorus were also common but improved along the study. A significant but not clinically relevant decrease in BMD of 4.14 ± 4.0% at the femoral neck was observed at 12 months without changes in osteocalcin levels. Vitamin deficiencies are common after Endobarrier® implant. It is therefore important to screen patients prior to and at regular intervals after the implant, and to encourage adherence to diet counselling and supplementation.

Endobarrier® in Grade I Obese Patients with Long-Standing Type 2 Diabetes: Role of Gastrointestinal Hormones in Glucose Metabolism.

BACKGROUND: The purpose of this study was to evaluate the efficacy and safety of Endobarrier® in grade 1 obese T2DM patients with poor metabolic control and the role of gastro-intestinal hormone changes on the metabolic outcomes. METHODS: Twenty-one patients aged 54.1 ± 9.5 years, diabetes duration 14.8 ± 8.5 years, BMI 33.4 ± 1.9 kg/m2, and HbA1c 9.1 ± 1.3 %, under insulin therapy, were implanted with Endobarrier®. Fasting concentrations of PYY, ghrelin and glucagon, and AUC for GLP-1 after a standard meal test were determined prior to and at months 1 and 12 after implantation. RESULTS: Patients lost 14.9 ± 5.7 % of their total body weight. HbA1c decreased 1.3 % in the first month, but at the end of the study, the reduction was 0.6 %. HbA1c ≤ 7 % was achieved in 26.3 % of patients. No differences in GLP-1 AUC values were found before and after implant. Fasting plasma ghrelin and PYY concentrations increased from month 1 to 12. Conversely, fasting plasma glucagon concentrations decreased at month 1 and increased thereafter. Weight (ß 0.152) and HbA1c decrease at month 1 (ß 0.176) were the only variables predictive of HbA1c values at 12 months (adjusted R 2 for the model 0.693, p = 0.001). Minor adverse events occurred in 14 % of patients and major events in 9.5 %. CONCLUSIONS: Endobarrier® in T2DM patients with grade I obesity and poor metabolic control is associated with significant weight decrease and moderate reduction in HbA1c at month 12. Our data do not support a role for GLP-1 in the metabolic improvement in this subset of patients.

SADI-S WITH RIGHT GASTRIC ARTERY LIGATION: TECHNICAL SYSTEMATIZATION AND EARLY RESULTS.

Background: Bariatric surgery is performed all over the world with close to 500.000 procedures per year. The most performed techniques are Roux-en-Y gastric bypass and sleeve gastrectomy. Despite this data, the most effective procedure, biliopancreatic diversion with or without duodenal switch, represents only no more than 1.5% of the procedures. Technical complexity, morbidity, mortality, and severe nutritional adverse effects related to the procedure are the main fears that prevent most universal acceptance. Aim: To explain the technical aspects and the benefits of the SADI-S with right gastric artery ligation as an effective simplification from the original duodenal switch. Methods: Were included all patients undergoing this procedure from the November 2014 to May 2016, describing and analysing aspects of this technique, the systematization and early complications associated with the procedure. Results: A series of 67 patients were operated; 46 were women (68.7%); mean age of the group was 44 years old (33-56); and an average BMI of 53.5 kg/m2 (50-63.5). Surgical time was 115 min (80-180). A total of five patients (7.5%) had any complication and two (2.9%) had to be reoperated. There were two patients with leak, one at the duodenal stump and other at the esophagogastric angle. There was no mortality. Patients stayed at the hospital a median of 2.5 days (1-25). Conclusions: SADI-S with right gastric artery ligation is a safe procedure with few preliminary complications. The technical variations introduced to the classical duodenal switch are reproducible and may allow this procedure to be more popular. All the complications in this series were not related to the ligation of the right gastric artery.

Racional: Cerca de 500.000 cirurgias bariátricas são realizadas a cada ano em todo o mundo. As técnicas mais realizadas são o bypass gástrico em Y-de-Roux e a gastrectomia vertical. A derivação biliopancreática, com ou sem duodenal switch, é considerada técnica mais eficaz no tratamento cirúrgico do paciente obeso mórbido; entretanto, representa não mais do que 1,5% dos procedimentos na atualidade, pois sua complexidade técnica, morbimortalidade e graves efeitos adversos nutricionais impedem aceitação mais universal. Objetivo: Descrever os aspectos técnicos e os benefícios do SADI-S com ligadura da artéria gástrica direita como um modo simplificado do duodenal switch original. Métodos: Foram incluídos todos os pacientes submetidos a este procedimento entre novembro 2014 e maio de 2016. Além da descrição da sistematização da técnica operatória, foram analisadas as complicações precoces associadas ao procedimento. Resultados: Uma série de 67 pacientes foi operada no período analisado; 46 eram mulheres (68,7%) e a média de idade foi de 44 anos (33-56). O IMC médio foi de 53,5 kg/m2 (50-63,5). O tempo cirúrgico médio foi de 115 min (80-180) e a permanência hospitalar média foi de 2,5 dias (1-25). Complicações foram observadas em cinco pacientes (7,5%) e dois (2,9%) tiveram de ser reoperados. Duas pacientes evoluíram com fístula, uma no coto duodenal e outra na junção esofagogástrica. Não houve mortalidade. Conclusão: SADI-S com ligadura da artéria gástrica direita é procedimento seguro com poucas complicações precoces. A simplificação técnica em relação ao duodenal switch clássico pode permitir que este procedimento se torne mais popular. Todas as complicações observadas nesta série não estavam relacionadas com a ligadura da artéria gástrica direita.

SADI-S WITH RIGHT GASTRIC ARTERY LIGATION: TECHNICAL SYSTEMATIZATION AND EARLY RESULTS / SADI-S COM LIGADURA DA ARTÉRIA GÁSTRICA: SISTEMATIZAÇÃO TÉCNICA E OS PRIMEIROS RESULTADOS

ABSTRACT Background: Bariatric surgery is performed all over the world with close to 500.000 procedures per year. The most performed techniques are Roux-en-Y gastric bypass and sleeve gastrectomy. Despite this data, the most effective procedure, biliopancreatic diversion with or without duodenal switch, represents only no more than 1.5% of the procedures. Technical complexity, morbidity, mortality, and severe nutritional adverse effects related to the procedure are the main fears that prevent most universal acceptance. Aim: To explain the technical aspects and the benefits of the SADI-S with right gastric artery ligation as an effective simplification from the original duodenal switch. Methods: Were included all patients undergoing this procedure from the November 2014 to May 2016, describing and analysing aspects of this technique, the systematization and early complications associated with the procedure. Results: A series of 67 patients were operated; 46 were women (68.7%); mean age of the group was 44 years old (33-56); and an average BMI of 53.5 kg/m2 (50-63.5). Surgical time was 115 min (80-180). A total of five patients (7.5%) had any complication and two (2.9%) had to be reoperated. There were two patients with leak, one at the duodenal stump and other at the esophagogastric angle. There was no mortality. Patients stayed at the hospital a median of 2.5 days (1-25). Conclusions: SADI-S with right gastric artery ligation is a safe procedure with few preliminary complications. The technical variations introduced to the classical duodenal switch are reproducible and may allow this procedure to be more popular. All the complications in this series were not related to the ligation of the right gastric artery.

RESUMO Racional: Cerca de 500.000 cirurgias bariátricas são realizadas a cada ano em todo o mundo. As técnicas mais realizadas são o bypass gástrico em Y-de-Roux e a gastrectomia vertical. A derivação biliopancreática, com ou sem duodenal switch, é considerada técnica mais eficaz no tratamento cirúrgico do paciente obeso mórbido; entretanto, representa não mais do que 1,5% dos procedimentos na atualidade, pois sua complexidade técnica, morbimortalidade e graves efeitos adversos nutricionais impedem aceitação mais universal. Objetivo: Descrever os aspectos técnicos e os benefícios do SADI-S com ligadura da artéria gástrica direita como um modo simplificado do duodenal switch original. Métodos: Foram incluídos todos os pacientes submetidos a este procedimento entre novembro 2014 e maio de 2016. Além da descrição da sistematização da técnica operatória, foram analisadas as complicações precoces associadas ao procedimento. Resultados: Uma série de 67 pacientes foi operada no período analisado; 46 eram mulheres (68,7%) e a média de idade foi de 44 anos (33-56). O IMC médio foi de 53,5 kg/m2 (50-63,5). O tempo cirúrgico médio foi de 115 min (80-180) e a permanência hospitalar média foi de 2,5 dias (1-25). Complicações foram observadas em cinco pacientes (7,5%) e dois (2,9%) tiveram de ser reoperados. Duas pacientes evoluíram com fístula, uma no coto duodenal e outra na junção esofagogástrica. Não houve mortalidade. Conclusão: SADI-S com ligadura da artéria gástrica direita é procedimento seguro com poucas complicações precoces. A simplificação técnica em relação ao duodenal switch clássico pode permitir que este procedimento se torne mais popular. Todas as complicações observadas nesta série não estavam relacionadas com a ligadura da artéria gástrica direita.

Is sleeve gastrectomy as effective as gastric bypass for remission of type 2 diabetes in morbidly obese patients?

BACKGROUND: The benefits of Roux-en-Y gastric bypass (RYGB) for the control of type 2 diabetes mellitus (T2DM) in morbidly obese patients are well known, although the implicated mechanisms have not yet been elucidated. However, little is known about the remission of T2DM after sleeve gastrectomy (SG). The aim of our study was to compare the outcomes of T2DM after both procedures. METHODS: We performed a retrospective analysis of diabetic morbidly obese patients who had undergone RYGB or SG. The variables analyzed included weight, fasting glycemia, and glycosylated hemoglobin. RESULTS: A total of 90 patients were included (60 RYGB and 30 SG). The body mass index was 46.22 kg/m(2) for the RYGB group and 56.80 kg/m(2) for the SG group. The fasting glycemia was 10.63 mmol/L and 8.05 mmol/L and the glycated hemoglobin was 8.1% and 7.3% in the RYGB and SG groups, respectively. No significant differences were seen in the amount of weight loss after 2 years between the 2 techniques. Similarly, no significant differences were found in T2DM control after either 1 year (91.8% versus 82.3%) or 2 years (91.8% versus 88.9%). No significant differences were found in the duration of T2DM in either group nor in the percentage of patients treated with insulin and oral hypoglycemic drugs before and 2 years after surgery. CONCLUSION: We did not find any significant differences in weight loss or T2DM resolution between the 2 techniques. Our results highlight that 1 of the mechanisms implicated in T2DM remission after bariatric surgery is weight loss. The role of other factors, such as incretins, that we have not studied cannot be ruled out and should be analyzed further.