Single Anastomosis Duodenal-Ileal Bypass with Sleeve Gastrectomy/One Anastomosis Duodenal Switch (SADI-S/OADS) IFSO Position Statement

Single anastomosis duodeno-ileal bypass with sleeve gastrectomy generates sustained improvement of glycemic control compared with sleeve gastrectomy in the diet-induced obese rat model

Bariatric surgery has become a recognized and effective procedure for treating obesity and type 2 diabetes (T2D). Our objective was to directly compare the caloric intake-independent effects of sleeve gastrectomy (SG) and single anastomosis duodenoileal bypass with SG (SADI-S) on glucose tolerance in rats with diet-induced obesity (DIO) and to elucidate the differences between bariatric surgery and caloric restriction.A total of 120 adult male Wistar rats with DIO and insulin resistance were randomly assigned to surgical (sham operation, SG, and SADI-S) and dietary (pair-feeding the amount of food eaten by animals undergoing the SG or SADI-S surgeries) interventions. Body weight and food intake were weekly monitored, and 6 weeks after interventions, fasting plasma glucose, oral glucose and insulin tolerance tests, plasma insulin, adiponectin, GIP, GLP-1, and ghrelin levels were determined.The body weight of SADI-S rats was significantly (p < 0.001) lower as compared to the sham-operated, SG, and pair-fed groups. Furthermore, SADI-S rats exhibited decreased whole body fat mass (p < 0.001), lower food efficiency rates (p < 0.001), and increased insulin sensitivity, as well as improved glucose and lipid metabolism compared to that of the SG and pair-fed rats.SADI-S was more effective than SG, or caloric restriction, in improving glycemic control and metabolic profile, with a higher remission of insulin resistance as well as long-term weight loss.

Single Anastomosis Duodeno-Ileal Bypass (SADI) as a Second Step After Failed Sleeve Gastrectomy: Systematic Review and Meta-analysis

Purpose

Our aim in this study is to assess single anastomosis duodeno-ileal bypass (SADI) as a salvage procedure following sleeve gastrectomy (SG), examining its technical feasibility, outcomes, and potential complications.

Materials and Methods

A systematic review and meta-analysis were conducted, drawing data from PubMed, Medline, and the Cochrane library. The analysis encompassed 14 studies, involving 1,066 patients. We evaluated operative time, comorbidity resolution (hypertension, dyslipidemia, diabetes), post-operative diarrhea incidence, excess weight loss (EWL) at six, twelve, and twenty-four months, and post-operative leak rates.

Results

SADI as a salvage procedure following SG yielded positive outcomes. Mean operative time was 125.98 minutes (95% CI 102.50-149.46, I2=99%). Importantly, SADI led to comorbidity resolution in a notable proportion of cases: hypertension in 48% (95% CI 38-57%, I2=44%), dyslipidemia in 55% (95% CI 40-69%, I2=30%), and diabetes in 63% (95% CI 53-72%, I2=30%) of patients. Post-operative diarrhea incidence was relatively low at 2% (95% CI 1-9%, I2=75%). In terms of weight loss, SADI patients exhibited substantial EWL: 47.73% (95% CI 37.86-57.61, I2=95%) at six months, 59.39% (95% CI 51.18-67.61, I2=95%) at twelve months, and 23.84% (95% CI 5.76-41.92, I2=100%). At twenty-four months. Furthermore, post-operative leak rate was relatively low, reported in only 1% (95% CI 0-5%, I2=80%) of cases.

Conclusion

SADI as a salvage procedure post-SG demonstrates technical feasibility and marked effectiveness. It offers substantial comorbidity resolution, significant weight loss, and low post-operative complication rates, notably post-operative leaks. Further research should investigate the long-term impact of SADI on patient nutritional status to facilitate its broader adoption.

The Efficacy and Safety of Laparoscopic Single-Anastomosis Duodeno-ileostomy with Sleeve Gastrectomy (SADI-S) in Mid- and Long-Term Follow-Up: a Systematic Review

This systematic review of 10 studies aimed to investigate the mid- and long-term results of duodeno-ileostomy with sleeve gastrectomy (SADI-S) according to the PRISMA guideline. Related articles, which reported outcomes of laparoscopic SADI-S with follow-up ≥ 3 years, were selected and analyzed. The percentage of excess weight loss (EWL) was 70.9-88.7%, and 80.4% at 6, and 10 years, respectively. The more common late complications were malabsorption (6.3%) and gastroesophageal reflux disease (GERD) (3.6%). The remission rates of hypertension, diabetes, GERD, obstructive sleep apnea, and dyslipidemia were 62.9%, 81.3%, 53.2%, 60.9%, and 69.7%, respectively. In conclusion, SADI-S is a safe and effective surgical technique with durable weight loss and a high rate of comorbidity resolution in mid and long term.

Decision-making in the management of obesity: a scoping review protocol

OBJECTIVE

This scoping review will evaluate the current published literature on decision-making in obesity management.

INTRODUCTION

Obesity is increasing in incidence worldwide. Although indications have been established for a variety of available treatment modalities, treatment selection must also factor in patient preferences, clinician expertise, and resource availability. Such considerations are crucial given the exponential expansion of new surgical techniques and pharmacologic options in the last decade. Although literature exists for decision-making on various obesity management topics, there are no scoping reviews systematically mapping the literature. This scoping review is timely given that the treatment of obesity has evolved into a multidisciplinary endeavor with myriad management decisions that both patients and clinicians must navigate.

INCLUSION CRITERIA

The review will consider for inclusion full-text primary studies, published in English from the year 2000 onwards, pertaining to decision-making in obesity management for health care providers involved in obesity management for patients aged ≥18 years.

METHODS

This scoping review will be conducted in accordance with the JBI methodology for scoping reviews. Embase (Elsevier), MEDLINE (PubMed), Scopus (Elsevier), Web of Science (Clarivate), CINAHL Complete (EBSCO), PsycINFO (EBSCO), and Cochrane Central (Wiley) will be systematically searched using a predefined strategy. Two independent reviewers will conduct a 3-tiered screen of identified articles, with a third reviewer resolving disputes. Data extraction will be performed using a predefined, yet flexible form. Descriptive summaries and mapping will be provided for included studies. Available evidence and knowledge gaps will be identified and summarized as they relate to specific concepts, populations, and contexts in obesity management decision-making.

Single Versus Double Anastomosis Duodenal Switch in the Management of Obesity: A Meta-analysis and Systematic Review

BACKGROUND

Biliopancreatic diversion with duodenal switch (BPD-DS) is an effective yet technically challenging bariatric surgery with many complications. Alternatively, single anastomosis duodenal-ileal bypass with sleeve gastrectomy (SADI-S) was recently introduced as a simplified bariatric procedure. This meta-analysis aimed to assess the safety and efficacy of SADI-S compared with BPD-DS in the management of patients with obesity.

METHODS

Cochrane, Embase, PubMed, Scopus, and Web of Science were searched for articles from their inception to May 2022 by 2 independent reviewers using the Preferred Reporting Items for Systematic Reviews and Meta-analysis system. The review was registered prospectively with PROSPERO (CRD42022333521).

RESULTS

From 123 studies screened, 6 studies met the eligibility criteria, with a total of 1847 patients with obesity undergoing either SADI-S (n=818) or BPD-DS (n=1029). Preoperative body mass index was similar between the 2 groups, and the BPD-DS group had a greater % excess body mass index loss (EBMIL) (MD=-10.16%, 95% confidence interval: -11.80, -8.51, I2=0%) at 2 years compared with the SADI-S group. There was no difference observed in preoperative comorbidities and remission, including diabetes, hypertension, and dyslipidemia between SADI-S and BPD-DS cohorts. Compared with BPD-DS, SADI-S had shorter hospital stays (MD=-1.36 d, 95% CI: -2.39, -0.33, I2=86%), and fewer long-term (>30 d) complications (OR=0.56, 95% CI: 0.42, 0.74, I2=20%). Conversely, among nutritional deficiency outcomes, the SADI-S group had few patients with abnormal vitamin D (OR=0.51, 95% CI: 0.36, 0.72, I2=0%) values than the BPD-DS group.

CONCLUSIONS

SADI-S has shown to be a possible alternative treatment option to BPD-DS in managing patients with obesity. Despite the promising results, further randomized controlled studies with more extended follow-up periods are necessary to ascertain the safety and efficacy of the treatment.

Patient Selection and 30-Day Outcomes of SADI-S Compared to RYGB: a Retrospective Cohort Study of 47,375 Patients

PURPOSE

Single anastomosis duodeno-ileal bypass with sleeve gastrectomy (SADI-S) offers a novel bariatric procedure with few comparative studies evaluating patient selection or perioperative outcomes. We aim to compare SADI-S to Roux-en-Y gastric bypass (RYGB).

MATERIALS AND METHODS

The 2020 Metabolic and Bariatric Accreditation and Quality Improvement Program (MBSAQIP) registry was analyzed, comparing SADI-S to RYGB. Bivariate analysis was performed to determine intergroup differences. Multivariable logistic regression determined factors associated with serious complications and mortality.

RESULTS

We evaluated 47,375 patients, with 501 (1.1%) receiving SADI-S. Patients undergoing SADI-S had higher body mass index (51.4 ± 9.7 kg/m² SADI-S vs. 44.6 ± 7.9 kg/m² RYGB; p < 0.001), and more metabolic comorbidities including non-insulin dependent diabetes (21.7% SADI-S vs 19.0% RYGB; p = 0.011), insulin dependent diabetes (12.0% SADI-S vs. 8.6% RYGB; p = 0.011), and hypertension (54.9% SADI-S vs 47.6% RYGB; p < 0.001). Patients undergoing SADI-S experienced more anastomotic leaks (2.2% vs. 0.5%; p < 0.001), reoperations (5.0% vs 2.6%; p < 0.001), pneumonias (1.6% vs 0.5%; p < 0.001), had sepsis more frequently (1.4% vs 0.3%; p < 0.001), and required more unplanned reintubations (1.2% vs 0.3%; p = 0.004). SADI-S was independently associated with serious complications (OR 1.45, CI 1.09-1.95, p < 0.001) but was not a predictor of mortality (OR 3.29, p = 0.060).

CONCLUSIONS

In comparison to RYGB, patients undergoing SADI-S were found to have more metabolic comorbidities. Compared to RYGB, SADI-S has worse perioperative outcomes and is independently associated with serious complications. It remains unclear whether this represents a learning curve or true findings and prospective studies analyzing the risk-benefit ratio following SADI-S are needed.

The Impact of the Length of the Common Intestinal Loop on Metabolic and Nutritional Outcomes of Patients with Severe Obesity Who Undergo of Single Anastomosis Duodeno-Ileal Bypass with Sleeve Gastrectomy: 5-Year Follow-Up

Introduction: Single-anastomosis duodeno-ileal bypass with sleeve gastrectomy (SADI-S) is a recent bariatric surgery technique, highly effective in terms of weight loss. Nevertheless, data regarding the impact of SADI-S at mid-long term (after >5 years of follow-up) are scarce. Objectives: To evaluate the effect of lengths of common intestinal loop on the evolution of patients with morbid obesity (MO), who undergo SADI-S. Materials and Methods: Descriptive study (case series), including patients with MO who underwent SADI-S procedure between January 2012 and December 2015 with at least 5 years of follow-up. Patients were classified as "Old-SADI-S" (OS) when length of the common alimentary loop was <2.5 m and "New-SADI-S" (NS) when length was >2.5 m. Clinical parameters and nutritional parameters were included. Results: Twenty-nine cases were included (17 OS; 12 NS), 86.2% women and mean age 46.7 ± 1 years. After 12 months, OS had significantly lower body mass index (29.7 ± 4.8 kg/m² versus 32.0 ± 5.1 kg/m², P = .01), without significant differences in the resolution of comorbidities. Nevertheless, OS group had severe malabsorptive complications requiring surgical conversion of OS to NS in 7 patients after 8 months. At 5 years of follow-up, no significant difference was seen between the two groups and resolution of comorbidities was maintained during this period of time. Conclusions: SADI-S is effective in terms of weight loss and resolution of comorbidities at 5 years of follow-up, regardless of the length of the common intestinal loop. However, a common intestinal loop <2.5 m was associated with severe malabsorptive complications that determined the surgical re-conversion in all cases.

Single anastomosis duodenal-ileal bypass with sleeve gastrectomy (SADI-S): experience from a high-bariatric volume center

Purpose

Biliopancreatic diversion with duodenal switch and single anastomosis duodenal-ileal bypass with sleeve gastrectomy (SADI-S) are technically demanding hypo-absorptive bariatric procedures generally indicated in super-obese patients (BMI ≥ 50 kg/m2). Data from the literature prove the procedure to be safe and effective, with promising bariatric and metabolic effects. Anyway, international societies support the creation of multicentric national and international registries to obtain more homogeneous data over the long period. We aimed to report our experience with this procedure.

Methods

Among 2313 patients who underwent bariatric procedures at our institution, between July 2016 and August 2021, 121 (5.2%) consenting patients were scheduled for SADI-S as primary (SADIS) or revisional procedure after sleeve gastrectomy (SADI) (respectively 87 and 34 patients). Early and late post-operative complications, operative time, post-operative stay, and follow-up data were analyzed.

Results

Overall, the median preoperative BMI was 52.3 (48.75–57.05) kg/m2 with a median age of 44 (39–51) years, the median operative time was 120 (100–155) min. Complications at 30th-day post-op were registered in 4 (3.3%) patients and late complications in 4 (3.3%) patients. At a median follow-up of 31 (14–39) months, the median percentage excess weight loss was 79.8 (55.15–91.45)%, and the median total weight loss was 57.0650 (43.3925–71.3475)%.

Conclusion

Our data, coherently with the literature, confirm that SADI-S is a safe, effective procedure with acceptable complications rate. Larger studies with longer follow-ups are necessary to draw definitive conclusions.

Evaluation of Metabolic Outcomes Following SADI-S: a Systematic Review and Meta-analysis

PURPOSE

Single anastomosis duodeno-ileal bypass with sleeve gastrectomy (SADI-S) offers a novel bariatric procedure. This systematic review and meta-analysis evaluates observational and comparative studies evaluating SADI-S, with meta-analysis comparing outcomes to other malabsorptive procedures (MPs).

MATERIALS AND METHODS

Systematic search of MEDLINE, Embase, Scopus, and Web of Science was conducted in March 2021. The study followed PRISMA guidelines. Studies evaluating SADI-S with n > 5 were included. Primary outcome was diabetes (DM) remission, and secondary outcomes included perioperative outcomes, comorbidity resolution, and weight loss.

RESULTS

We reviewed 2285 studies with 16 included evaluating 3319 patients and 1704 (51.3%) undergoing SADI-S. SADI-S patients had increased BMI (49.6 kg/m² vs 48.8 kg/m²) and weight (139.7 kg vs 137.1 kg), were more likely to have DM (46.3% vs 42.1%), and dyslipidemia (36.6% SADI-S vs 32.7%). SADI-S had a shorter operative duration than MPs (MD - 36.74, p < 0.001), 0.85-day shorter post-operative stay (p < 0.001), and trended towards fewer complications (OR 0.69, p = 0.06). Rate of reoperation (OR 0.83, p = 0.59) was similar and DM remission was similar (OR 0.07, p = 0.1). Subgroup analysis suggested greater DM remission than Roux-en-Y gastric bypass (OR 4.42, p = 0.04). SADI-S had fewer malabsorptive complications, though follow-up was shorter. Weight loss was 37.3% compared to 35.6% total weight loss after SADI-S and MPs, respectively.

CONCLUSION

SADI-S demonstrates improved metabolic and weight loss outcomes with lower perioperative risks. SADI-S represents a promising bariatric procedure but long-term outcomes are needed to guide future uptake.

Surgical Treatment of Obesity. Special Mention to Roux-en-Y Gastric Bypass and Vertical Gastrectomy

INTRODUCTION

The prevalence of obesity has increased exponentially in recent decades, being one of the diseases that most affects global health. It is a chronic disease associated with multiple comorbidities, which lead to a decrease in life expectancy and quality of life. It requires a multidisciplinary approach by a specialized medical team. Obesity can be treated with conservative or with surgical treatments that will depend on the characteristics of the patient.

OBJECTIVE/METHODOLOGY

The referenced surgery can be performed using different surgical techniques that are analyzed in the present work through an exhaustive narrative bibliographic review in the PubMed and Cochrane databases, as well as in UpToDate.

RESULTS

Currently, those most used are restrictive techniques, specifically vertical gastrectomy and mixed techniques, with gastric bypass being the "gold standard".

CONCLUSIONS

In order to choose one technique or another, the characteristics of each patient and the experience of the surgical team must be taken into account.

Single Anastomosis Duodeno-ileal Bypass As a Revisional Procedure Following Sleeve Gastrectomy: Review of the Literature

Laparoscopic sleeve gastrectomies (LSGs) can experience weight-loss failure and conversion to another bariatric procedure. An analysis of the bariatric literature concerning the single anastomosis duodeno-ileal bypass with sleeve gastrectomy (SADI-S) as revisional surgery after LSG in terms of safety and efficacy identified 607 studies. Fifty-nine studies were analyzed for full content review and 9 primary studies (398 patients) were included. Revisional single anastomosis duodeno-ileal bypass (SADI) was performed in 294 patients at a mean interval of 37.7 months (range 11-179). Total weight loss (%) varies from 20.5% to 46.2%. Early complications after surgery occurred in 4.1% surgeries including leak (7 cases -1.9%). Mortality was nil. SADI after LSG, after failed sleeve gastrectomy or as a sequential procedure, offers a satisfactory weight loss result. Both early and late term complications are acceptable.

Comparison of single- versus double-anastomosis duodenal switch: a single-center experience with 2-year follow-up

BACKGROUND

Single-anastomosis duodenal switch (SADS) has emerged in recent years as an alternative to the standard double-anastomosis duodenal switch (DADS). The objective of this study was to compare short- and medium-term outcomes between SADS and DADS.

METHODS

Data collected in the Ontario Bariatric Registry between 2010 and 2019 were used for this retrospective study to determine outcomes of patients undergoing primary laparoscopic SADS versus DADS at a Canadian tertiary hospital and bariatric center of excellence. The primary outcome was weight loss at 1 and 2 years after surgery. Short-term secondary outcomes included operative times, intra- and early postoperative complications, hospital length of stay (LOS), and 30-day readmissions. Medium-term secondary outcomes included late postoperative complications as well as nutritional deficiencies and persistent diarrhea at 1 and 2 years after surgery. Subgroup analyses were performed to compare patients undergoing one- and two-stage procedures.

RESULTS

Data of 107 patients who underwent SADS (n = 25) or DADS (n = 82) were included in the study. Follow-up data were available for 59/107 (55.1%) patients at 1 year and 47/107 (43.9%) at 2 years after surgery. Patients in the SADS and DADS groups had similar %TBWL at 1 year (23.6 versus 26.2, P = 0.617) and 2 years (24.8 versus 30.2, P = 0.116) after surgery. Short- and medium-term outcomes were similar between groups. There was no difference between patients undergoing one- versus two-stage procedures.

CONCLUSION

This study showed that patients undergoing SADS and DADS had similar weight loss at 1 and 2 years. Early and late postoperative morbidity, operative times, early readmissions, and LOS were also similar between groups. Further studies with longer follow-up are required to confirm these results.

Roux-En-Y Gastric Bypass Versus Sleeve Gastrectomy Plus Procedures for Treatment of Morbid Obesity: Systematic Review and Meta-Analysis

Sleeve gastrectomy (SG) and Roux-en-Y gastric bypass (RYGB) are the most commonly performed bariatric procedures globally, but both techniques have shortcomings. Several modifications of SG (SG plus procedures) have been developed, but the efficacy of the different procedures has not been completely elucidated. In this meta-analysis, we aimed to evaluate the efficacy and safety of SG plus procedures. Out of the initially identified 2357 studies, thirteen were selected for this meta-analysis: two studies on banded sleeve gastrectomy (BSG), four studies on sleeve gastrectomy plus duodenal-jejunal bypass (SG + DJB) or sleeve gastrectomy with loop duodenal-jejunal bypass (SADJB), two studies on sleeve gastrectomy with jejunal-jejunal bypass (SG + JJB), four studies on single anastomosis duodenal-ileal switch (SADI-S), and one study on stomach intestinal pylorus-sparing surgery (SIPS). SADI-S procedure was found to achieve significantly greater percentage of excess weight loss than the RYGB. SG + DJB and SADJB achieved greater weight loss than the RYGB. Major complications were fewer with SG + JJB than with RYGB, but the difference was not significant. Overall, SG plus procedures appear to achieve better weight loss and cause fewer complications than RYGB.

Three-Year Outcomes of Sleeve Gastrectomy Plus Jejunojejunal Bypass: a Retrospective Case-Matched Study with Sleeve Gastrectomy and Gastric Bypass in Chinese Patients with BMI ≥35 kg/m2

BACKGROUND

Sleeve gastrectomy plus jejunojejunal bypass (SG+JJB) is a novel bariatric procedure. In this study, we compared the 3-year outcomes of SG+JJB to those of sleeve gastrectomy (SG) and gastric bypass (RYGB).

METHODS

This retrospective study included 113 patients (SG, N=31; RYGB, N=33; SG+JJB, N=49) with a preoperative BMI≥35 kg/m². Among them, 31 pairs of patients who underwent SG+JJB/SG and 33 pairs who underwent SG+JJB/RYGB were matched by sex, age (±2 years), and BMI (±2 kg/m²). Postoperative weight loss, diabetes remission, and patient complaints at the 3-year follow-up were compared.

RESULTS

SG+JJB yielded higher 3-year total weight loss (TWL) than SG alone (35.5±9.1% vs 31.5±7.3%, P=0.031) and equivalent 3-year %TWL to RYGB. The diabetes remission rate of SG+JJB was similar to that of SG or RYGB. SG+JJB resulted in a higher incidence of malodorous flatus than SG (25.8% vs 0, P<0.05). Compared to RYGB, SG+JJB resulted in a higher incidence of postoperative de novo gastroesophageal reflux disease (GERD) symptoms (30.3% vs 0, P<0.05).

CONCLUSIONS

In the present study, we found that SG+JJB yielded higher weight loss than SG and similar weight loss to RYGB at the 3-year follow-up. SG+JJB increased the risk of malodorous flatus compared to SG and de novo GERD symptoms compared to RYGB.

Efficacy and Drawbacks of Single-Anastomosis Duodeno-Ileal Bypass After Sleeve Gastrectomy in a Tertiary Referral Bariatric Center

Background

The need for revisional procedures after sleeve gastrectomy (SG) for insufficient weight loss or weight regain, gastroesophageal reflux, or other complications is reported to be 18–36% in studies with 10-year follow-up. Single-anastomosis duodeno-ileal bypass (SADI) may be performed as a revisional procedure after SG. This study aims to evaluate the short- and mid-term outcomes of SADI after SG in a referral center for bariatric surgery.

Materials and Methods

Data of patients who underwent SADI between March 2015 and March 2020 were collected prospectively and analyzed retrospectively. Follow-up comprised clinical and biochemical assessment at 1, 3, 6, 12, 18, and 24 months postoperatively, and once a year thereafter.

Results

Overall, 106 patients underwent SADI after a previous SG. The timeframe between SG and SADI was 50 ± 31.3 months. Postoperative mortality was observed in two cases (1.8%) and morbidity in 15.1% of patients. At 24 months, %total weight loss was 37.6 ± 12.3 and %excess weight loss 76.9 ± 25.2 (64 patients). Three patients were treated for malnutrition during follow-up, two with medical treatment and one with SADI reversal.

Conclusion

SADI after SG provides effective weight loss results in the short-term, even if in the present series the postoperative complication rate was non-negligible. Further trials are needed to establish the more advantageous revisional bariatric procedure after failed SG.

Supplementary Information

The online version contains supplementary material available at 10.1007/s11695-021-05323-y.

Obesity, Cancer, and Risk Reduction with Bariatric Surgery

The prevalence of noncommunicable diseases has increased dramatically in North America and throughout the world and is expected to continue increasing in coming years. Obesity has been linked to several types of cancers and is associated with increased morbidity and mortality following cancer diagnosis. Bariatric surgery has emerged as the prominent model to evaluate the effects of intentional weight loss on cancer incidence and outcomes. Current literature, comprising prospective cohort investigations, indicates site-specific reductions in cancer risk with select bariatric procedures. Future research is required to establish evidence-based indications for bariatric surgery in the context of cancer prevention.

Safety and feasibility of laparoscopic sleeve gastrectomy with loop duodenojejunal bypass for obesity

Purpose

Laparoscopic sleeve gastrectomy (SG) with loop duodenojejunal bypass (LDJB) is a combination of SG and one anastomosis gastric bypass surgeries. This study was intended to evaluate the safety and feasibility of SG-LDJB surgery.

Methods

This was a retrospective study analyzing SG-LDJB surgery using 250-cm length biliopancreatic limbs that was performed between May 2013 and December 2017 in 113 Indians with obesity. All demographic, clinical, operative, and follow-up data were analyzed for weight loss and diabetes remission efficacy. Weight-loss success was defined as percentage of total weight loss (%TWL) ≥ 25%. Diabetes remission was defined as hemoglobin A1c < 6% without the need for antidiabetic medications. Safety and feasibility were analyzed in terms of intraoperative and postoperative complications and serum albumin, iron, and calcium levels.

Results

The %TWL was 35.0% and 31.0% at the 1-year and 3-year follow-ups, respectively. The weight-loss success rate was 91.3% and 78.1% at the 1-year and 3-year follow-ups, respectively. Sixty-six out of 113 patients had type 2 diabetes. Diabetes remission was 80.0% and 75.4% at the 1-year and 3-year follow-ups, respectively. Major perioperative complications occurred in 0.9% of the patients. The 30-day mortality rate was zero. None of the patients had serum albumin levels of <3 g/dL at the 1-year and 3-year follow-ups or symptoms of hypoproteinemia.

Conclusion

SG-LDJB surgery using a 250-cm biliopancreatic limb is a safe and effective procedure to treat obesity. It is technically complex but has the advantages of endoscopic access to the stomach and negligible postoperative complications or hypoproteinemia.

Metabolic efficacy following laparoscopic sleeve gastrectomy with loop duodenal switch surgery for type 2 diabetes in Indian patients with severe obesity

BACKGROUND AND AIMS

Metabolic surgery improves glycemic control in patients with type 2 diabetes (T2DM) and severe obesity. Sleeve gastrectomy with loop duodenal switch (SLDS), a loop modification of biliopancreatic diversion with duodenal switch, is aimed to reduce the malabsorption, without compromising the efficacy. This study was designed to analyze the metabolic efficacy following SLDS.

METHODS

Eighty patients, who underwent SLDS for T2DM and severe obesity between January 2014 and February 2020 were retrospectively analyzed. Complete T2DM remission was defined as HbA1_C < 6% in the absence of anti-diabetic medications. T2DM remission was analyzed at the 6-month and 1-year follow-ups in terms of various predictors. Prediction of T2DM remission by ABCD, DiaRem and IMS scores was analyzed. Lower ABCD scores and higher DiaRem and IMS scores indicate severe T2DM.

RESULTS

Following SLDS, HbA1_C significantly reduced from 8.7% to 5.5% at the 6-month and 5.1% at the 1-year follow-ups. T2DM remission was 82.5% at the 6-month and 90.8% at the 1-year follow-ups. Preoperative glycemic control positively predicted, while T2DM duration and preoperative insulin use negatively predicted T2DM remission. Higher ABCD score, lower DiaRem and IMS scores predicted higher T2DM remission. Severe hypoalbuminemia was 20% in patients with 250 cm common channel and 02% in patients with ≥300 cm common channel at the 1-year follow-up.

CONCLUSIONS

SLDS is an effective surgery to treat T2DM with severe obesity. Shorter T2DM duration, better preoperative glycemic control and the absence of insulin use were associated with better T2DM remission. Malabsorption was significantly lesser, when common channel was ≥300 versus 250 cm.

Bariatric Surgery-How Much Malabsorption Do We Need?-A Review of Various Limb Lengths in Different Gastric Bypass Procedures

The number of obese individuals worldwide continues to increase every year, thus, the number of bariatric/metabolic operations performed is on a constant rise as well. Beside exclusively restrictive procedures, most of the bariatric operations have a more or less malabsorptive component. Several different bypass procedures exist alongside each other today and each type of bypass is performed using a distinct technique. Furthermore, the length of the bypassed intestine may differ as well. One might add that the operations are performed differently in different parts of the world and have been changing and evolving over time. This review evaluates the most frequently performed bariatric bypass procedures (and their variations) worldwide: Roux-en-Y Gastric Bypass, One-Anastomosis Gastric Bypass, Single-Anastomosis Duodeno-Ileal Bypass + Sleeve Gastrectomy, Biliopancreatic Diversion + Duodenal Switch and operations due to weight regain. The evaluation of the procedures and different limb lengths focusses on weight loss, remission of comorbidities and the risk of malnutrition and deficiencies. This narrative review does not aim at synthesizing quantitative data. Rather, it provides a summary of carefully selected, high-quality studies to serve as examples and to draw tentative conclusions on the effects of the bypass procedures mentioned above. In conclusion, it is important to carefully choose the procedure and small bowel length excluded from the food passage suited best to each individual patient. A balance has to be achieved between sufficient weight loss and remission of comorbidities, as well as a low risk of deficiencies and malnutrition. In any case, at least 300 cm of small bowel should always remain in the food stream to prevent the development of deficiencies and malnutrition.

Metabolic surgery: A clinical update

Metabolic and bariatric surgery has grown beyond 'experimental' weight-loss surgery. As techniques have advanced over the last few decades, so has the growing body of research and evidence, proving that both weight-loss and metabolic health improvement are induced. Metabolic surgery has become the more appropriate term for weight-loss surgery because of the altered gastrointestinal anatomy and subsequent beneficial metabolic effects. Although the tool of metabolic surgery has been well refined, a large portion of the global population does not have adequate access to it. This clinical update aims to (a) inform healthcare providers from all disciplines about the myriad of benefits of metabolic surgery and (b) equip them with the necessary knowledge to bridge the gap between patients in need of metabolic treatment and the therapies in metabolic surgery available to them.

The Effectiveness of Single-Anastomosis Duodenoileal Bypass with Sleeve Gastrectomy/One Anastomosis Duodenal Switch (SADI-S/OADS): an Updated Systematic Review

Single-anastomosis duodenoileal bypass with sleeve gastrectomy/one anastomosis duodenal switch (SADI-S/OADS) was developed as a bariatric operation with reduced overall morbidity and lasting weight loss results. We performed a systematic review of the literature, including 14 studies reporting on weight loss, comorbidity resolution, postoperative complications, and nutritional deficiencies following SADI-S. Twelve months after SADI-S, the mean total body weight lost ranged from 21.5 to 41.2%, with no weight regain being observed after 24 months. The comorbidity resolution rate was 72.6% for diabetes, 77.2% for dyslipidemia, and 59.0% for hypertension cases. The need for reoperation was the most common postoperative complication. While several patients developed nutrient deficiencies, SADI-S seems to be an overall safe and effective bariatric operation.

Omega Loop Gastroileal Bypass (OLGIBP/SAGI) Versus One Anastomosis Gastric Bypass (OAGB): Medium-Term Results

INTRODUCTION

In bariatric surgery, new surgical techniques are continually being developed. The one anastomosis gastric bypass (OAGB) has become increasingly common since 2001. However, some patients experience bile reflux or excessive weight loss. This study aimed to assess a new bariatric procedure designed to avoid some of the drawbacks of conventional OAGB.

MATERIAL AND METHODS

To lower the complication rate and pathophysiological impact after OAGB, we performed an omega loop gastroileal bypass (OLGIBP/SAGI) with a 300-cm common limb. We compared this technique with OAGB.

RESULTS

Seventeen patients underwent OLGIBP and 23 underwent OAGB. Mean operative time was 108 min for OLGIBP vs 103 min for OAGB. The mean hospital length of stay was 3 days (1 to 7). No complications related to the gastroenterostomy occurred. At 3 years, among OAGB patients, there were 5 (21.7%) cases of bile reflux including 2 (8.7%) requiring a revision to Roux-en-Y gastric bypass. Among OLGIBP patients, there were 3 (17.6%) cases of bile reflux 1 (5.9%) requiring a revision to Roux-en-Y gastric bypass. There was no albumin deficiency. At 3 years, % of total weight loss (TWL) was 43.6 + - 6.2 in the OAGB group vs 48.2 + - 7.4 in the OLGIBP group.

CONCLUSIONS

The bariatric and metabolic outcomes of OLGIBP are expected to be similar to those of OAGB. The OLGIBP technique should reduce the risks of malnutrition and bile reflux. The two techniques can be safely performed and offer alternatives in bariatric surgery.

Single Anastomosis Duodenal-Ileal Bypass with Sleeve Gastrectomy/One Anastomosis Duodenal Switch (SADI-S/OADS) IFSO Position Statement-Update 2020

PreambleThe International Federation for the Surgery of Obesity and Metabolic Disorders (IFSO) has played an integral role in educating both the metabolic surgical and the medical communities at large about the role of innovative and new surgical and or endoscopic interventions in treating adiposity-based chronic diseases. The single anastomosis duodenal-ileal bypass with sleeve gastrectomy/one anastomosis duodenal switch (SADI-S/OADS) is a relatively new procedure that has been proposed as an alternative to the conventional duodenal switch (DS) procedure. The IFSO published a position paper on SADI-S/OADS in 2018 with which concluded that this procedure was likely to be a safe and efficacious treatment for adiposity and its related diseases. However, it noted that there was insufficient long-term data and minimal high-level evidence available. The position statement called for patients to be enrolled in long-term multidisciplinary care encouraged the registration of patients in national registries, and called for more randomized controlled trials (RCT) (Obes Surg 28:1207-16, 2018) involving the procedure. The following position statement is an update of the previous position statement. It is issued by the IFSO SADI-S/OADS task force and has been reviewed and approved by both the IFSO Scientific Committee and Executive Board. This statement is based on current clinical knowledge, expert opinion, and published peer-reviewed scientific evidence. It will be reviewed again in 2 years.

Metabolic Efficacy and Diabetes Remission Predictors Following 'Sleeve Gastrectomy with Loop Duodenojejunal Bypass' Surgery

PURPOSE

Laparoscopic sleeve gastrectomy with loop duodenojejunal bypass (SLDJB) is a novel metabolic surgery that is a modification of the single anastomosis duodenoileal bypass with sleeve. Compared to conventional surgeries, SLDJB is highly effective in inducing diabetes remission. This study analyzed the metabolic efficacy of SLDJB.

MATERIALS AND METHODS

Seventy-eight patients with obesity and diabetes who underwent SLDJB between May 2013 and October 2017 were retrospectively analyzed to investigate the efficacy of their surgery and diabetes remission predictors. Complete diabetes remission was defined as an HbA1_c level <6% with cessation of insulin and oral hypoglycemic agents.

RESULTS

Complete diabetes remission occurred in 80.52% and 76.71% of patients at 1- and 3-year follow-ups, respectively. There was no significant difference in the rates of complete diabetes remission between the groups based on gender, preoperative body mass index (BMI), diabetes duration or preoperative insulin use. There was a significantly higher rate of complete remission in patients <50 years of age at the 1-year follow-up. Additionally, the rate of complete remission was significantly less when preoperative glycemic control was poor. Preoperative HbA1_c levels negatively predicted complete remission, but was significant only at the 3-year follow-up.

CONCLUSION

SLDJB is highly effective in treating obesity with type 2 diabetes, and preoperative glycemic control was found to predict complete remission. Patients under 50 years of age had a better short-term response rate; however, the surgery was effective regardless of gender, preoperative BMI, duration of diabetes or preoperative insulin use.

A Matched Cohort Comparison of Long-term Outcomes of Roux-en-Y Gastric Bypass (RYGB) Versus Single-Anastomosis Duodeno-ileostomy with Sleeve Gastrectomy (SADI-S)

BACKGROUND

The long-term effectiveness of Roux-en-Y gastric bypass (RYGB) and single-anastomosis duodeno-ileostomy with sleeve gastrectomy (SADI-S) is unknown.

PURPOSE

Compare the long-term outcomes.

SETTING

Single private institute, USA.

MATERIALS AND METHODS

Data from 1254 patients who underwent primary RYGB or SADI-S were used for a retrospective matched cohort. Data were obtained by matching every RYGB patient to a SADI-S patient of the same sex, body mass index (BMI), and weight. Only patients out 5 years and had at least one > 5-year follow-up visit were included.

RESULTS

The matched cohort included 61 RYGB and 61 SADI-S patients. There was no statistical, demographic difference between the two groups. At 5 years, a 100% follow-up was available in each group. The intraoperative outcomes were significantly better with SADI-S. The 30-day readmission, reoperation, emergency department (ED) visits, and complication rates were statistically similar between the two groups. The long-term complication rates, Clavien-Dindo grade IIIb complications, and number of patients with more than one complication were significantly lower with SADI-S. Weight loss was significantly greater in the SADI-S group at 5 years. The long-term weight-loss failure rate was significantly higher in the RYGB group. The SADI-S procedure was associated with fewer reintervention through 6 years (14.7% patients vs. 39.3% patients, p = 0.001). Conversion or reversal of the procedure was required only in the RYGB group. There also was no significant difference in nutritional outcomes between the two procedures.

CONCLUSIONS

This study showed that problems, including long-term complications, reinterventions, weight-loss failure, and conversion, were more often associated with RYGB than with SADI-S. The SADI-S may be considered one of the viable alternatives to RYGB.

Single anastomosis duodeno-ileal bypass with sleeve gastrectomy (SADI-S): short-term outcomes from a prospective cohort study

BACKGROUND

Single anastomosis duodeno-ileal bypass with sleeve gastrectomy (SADI-S) is a modification of the classic duodenal switch (DS). These modifications are intended to address concerns about DS, including malnutrition, longer operative times, and technical challenges, while preserving the benefits.

OBJECTIVES

To evaluate safety and outcomes of SADI-S as it compares to classic DS procedure.

SETTING

Bariatric Surgery Center of Excellence, University Hospital, Montreal, Canada.

METHODS

In a single-institution prospective cohort study, we compared safety and outcomes of the SADI-S versus DS procedures (ClinicalTrials.gov: NCT02792166; registered: 06/2016). Data is depicted as count (percentage) or median (interquartile range).

RESULTS

There were 42 patients who underwent SADI-S, of whom 11 had it as a second-stage procedure (26%). There were 20 patients who underwent DS, of whom 12 had it as second-stage procedures (60%). Both groups were similar at baseline. The median age was 45 (14) years, 39 (63%) were female, the median body mass index (BMI) was 48.2 (7.7) kg/m², and 29 (47%) patients had diabetes. The operative time was shorter for 1-stage SADI-S versus DS surgery (211 [70] versus 250 [60] min, respectively; P = .05) but was similar for second-stage procedures (P = .06). The 90-day complication rates were 11.9% (N = 5/42) after SADI-S and 5.0% (N = 1/20) after DS surgery (P = .64). There were no mortalities. Median follow-ups for 1-stage SADI-S and DS were 17 (11) and 12 (24) months, respectively (P = .65). Similar BMI changes were observed after 1-stage SADI-S (17.9 kg/m² [8.7]) and DS (17.5 kg/m² [16]; P = .65). At median follow-ups of 10 (20) and 14 (16) months after second-stage SADI-S and DS, respectively (P = .53), surgical procedures yielded added 5.0 kg/m² (5.8) and 6.5 kg/m² (7.1) changes in BMI, respectively (P = .26). Complete remission rates for diabetes were 91% after SADI-S (n = 21/23) and 50% after DS (n = 3/6). Compared with the SADI-S procedure, DS surgery was associated with higher frequencies of deficiencies in some fat-soluble vitamins, especially vitamin D.

CONCLUSIONS

The SADI-S procedure is safe, and its short-term outcomes, including weight loss and the resolution of co-morbidities, are similar to those of DS. SADI-S surgery also has promising potential as a second-stage procedure after sleeve gastrectomy.

Conversion from Duodenal Switch to Single Anastomosis Duodenal Switch to Deal with Postoperative Malnutrition

BACKGROUND

Duodenal switch (DS) is considered one of the most effective bariatric techniques for long-term weight and comorbidity control. After these operations, some patients may get severe complications related to malnutrition and a few of them may need surgical revision. Lengthening the common channel (CC) is usually the solution: changing the Roux anastomosis or with a side-to-side anastomosis (kissing X). We propose that when simplified construction of the DS is used, conversion to single anastomosis DS (SADI-S/OADS) is an easy and safe choice.

OBJECTIVES

To evaluate the safety and effectiveness of conversion from DS to SADI-S in cases of malnutrition.

METHODS

We report three patients with severe malnutrition after a DS at 9, 74, and 84 months. One of them had also liver failure related to alcohol abuse and malnutrition. Laparoscopic reoperations included a new ileo-ileal anastomosis and takedown of the Roux-en-Y anastomosis with the aim of lengthening the CC.

RESULTS

All three patients were successfully converted by laparoscopy. After a median follow-up of 54.6 months [32-76 months], all of them had moderate weight regain and returned to normal biochemical nutritional parameters. Two patients with type 2 diabetes (T2DM) before DS had complete remission before conversion; one of them had recurrence of T2DM after conversion. The patient with liver failure improved significantly after conversion.

CONCLUSIONS

Conversion from DS to SADI-S/OADS is a simple operation with excellent results in resolving malnutrition in those patients. However, weight regain and recurrence of comorbidities may arise.

SADI-S 250 vs Roux-en-Y Duodenal Switch (RY-DS): Results of 5-Year Observational Study

PURPOSE

There are only a small number of studies providing a comparison between SADI-S and Hess-Marceau's BPD/Duodenal Switch (RY-DS) operations. We aimed to compare 5-year results of SADI-S 250 (common limb 250 cm) with RY-DS.

MATERIAL AND METHODS

Data of patients who underwent open SADI-S (n 226) and RY-DS (n 528) were retrospectively studied. EWL(%), EBMIL(%), TWL(%), antidiabetic effect, complications, and revision rate were compared between the two groups.

RESULTS

After the first 12 months, EWL% (77.0% vs 73.3%) and TWL% (39.4% vs 38.9%) were statistically significantly better after SADI-S (p < 0.01, and p < 0.05 respectively), but not EBMIL% (p > 0.05). At nadir to 24-36 months, EWL, TBWL, and EBMIL after SADI-S was comparable to the RY-DS group. Up to the fourth and fifth year, better weight loss (TBWL, EBMIL, EWL) was observed after RY-DS than after SADI-S. Early complication rate was less (2.65%) in the SADI-S group vs 5.1% in the RY-DS. Protein deficiency and small bowel obstruction rates were also lower after SADI-S. 93.4% of patients achieved total remission of their diabetes. 7.5% of patients in the SADI-S group had symptoms of bile reflux, which was a main indication for revisions.

CONCLUSION

SADI-S has many advantages over RY-DS. However, weight loss and antidiabetic effects after the third year were marginally lower after SADI-S compared to RY-DS. SADI-S is less dangerous in terms of malabsorption and looks to be a reasonable alternative to RY-DS as a metabolic operation. RY-DS could be implemented for weight regain and/or bile reflux after SADI-S.

The outcomes of single anastomosis sleeve jejunal bypass as a treatment for morbid obesity (Two-year follow-up)

INTRODUCTION

Santoro's operation is a sleeve gastrectomy with transit bipartition. The aim of the procedure is to keep pass to the duodenum to decrease nutritional deficiency and to allow endoscopic management of obstructive jaundice. To be easier, this procedure was rapidly altered to a single anastomosis sleeve ileal bypass (SASI). In this study, we shifted the anastomosis up to the jejunum to evaluate the effect of laparoscopic single anastomosis sleeve jejunal (SASJ) bypass as a treatment for morbid obesity and related comorbidities. In addition, the effect of the SASJ procedure on nutritional deficiency was examined.

METHODS

In this study, 150 morbidly obese patients underwent SASJ bypass with a biliary limb length of 200-250 cm. All patients were followed up at 1, 3, 6, 12, 18, and 24 months. We evaluated all cases by assessing BMI, complications, nutritional status, and obesity-related comorbidities.

RESULTS

The mean age of participants was 30.6 years, and the mean body mass index (BMI) was 44.6 kg/m². Of the patients, 35 (23.2%) had type two diabetes and 47 (31.3%) were hypertensive. Postoperative bleeding occurred in two cases (1.3%). One patient developed a gastric leak (0.7%), and five patients developed biliary gastritis (3.3%). One patient (0.7%) developed a pulmonary embolism. The %EWL reached 85% in 1 year. Normalization of blood glucose occurred within 2 months after surgery in all diabetic patients. Hypertension underwent remittance in 89% of hypertensive patients. All patients were gradually weaned from four types of multivitamin regimens to only one multivitamin regimen without apparent nutritional deficiency.

CONCLUSIONS

Laparoscopic SASJ bypass is an effective, safe, and simple procedure for treating morbid obesity and comorbid conditions with least nutritional deficiency. However, long-term studies are needed.

Standardization of Bariatric Metabolic Procedures: World Consensus Meeting Statement

BACKGROUND

Standardization of the key measurements of a procedure's finished anatomic configuration strengthens surgical practice, research, and patient outcomes. A consensus meeting was organized to define standard versions of 25 bariatric metabolic procedures.

METHODS

A panel of experts in bariatric metabolic surgery from multiple continents was invited to present technique descriptions and outcomes for 4 classic, or conventional, and 21 variant and emerging procedures. Expert panel and audience discussion was followed by electronic voting on proposed standard dimensions and volumes for each procedure's key anatomic alterations. Consensus was defined as ≥ 70% agreement.

RESULTS

The Bariatric Metabolic Surgery Standardization World Consensus Meeting (BMSS-WOCOM) was convened March 22-24, 2018, in New Delhi, India. Discussion confirmed heterogeneity in procedure measurements in the literature. A set of anatomic measurements to serve as the standard version of each procedure was proposed. After two voting rounds, 22/25 (88.0%) configurations posed for consideration as procedure standards achieved voting consensus by the expert panel, 1 did not attain consensus, and 2 were not voted on. All configurations were voted on by ≥ 50% of 50 expert panelists. The Consensus Statement was developed from scientific evidence collated from presenters' slides and a separate literature review, meeting video, and transcripts. Review and input was provided by consensus panel members.

CONCLUSIONS

Standard versions of the finished anatomic configurations of 22 surgical procedures were established by expert consensus. The BMSS process was undertaken as a first step in developing evidence-based standard bariatric metabolic surgical procedures with the aim of improving consistency in surgery, data collection, comparison of procedures, and outcome reporting.

Isolated intestinal transit bipartition: a new strategy for staged surgery in superobesity

OBJECTIVE

biliopancreatic diversion with duodenal switch is a complex, malabsorptive procedure, associated with improved weight loss and metabolic control. Staged surgery with sleeve gastrectomy as the first stage is an option for reducing complications in superobese patients. However, some problems persist: large livers can hamper the surgical approach and complications such as leaks can be severe. Intestinal transit bipartition is a modified and simplified model of biliopancreatic diversion that complements sleeve gastrectomy. It is similar to the duodenal switch, but with less complexity and fewer nutritional consequences. This study assessed the feasibility and safety of isolated transit bipartition as the initial procedure in a two-step surgery to treat superobesity.

METHODS

this prospective study included 41 superobese patients, with mean BMI 54.5±3.5kg/m2. We performed a laparoscopic isolated transit bipartition as the first procedure in a new staged approach. We analyzed weight loss and complications during one year of follow-up.

RESULTS

we completed all the procedures by laparoscopy. After six months, the mean percent excess weight loss was 28%, remaining stable until the end of the study. There were no intraoperative difficulties. Half of the patients experienced early diarrhea, and three had marginal ulcers. There were no major surgical complications or deaths.

CONCLUSION

isolated laparoscopic transit bipartition is a new option for a staged approach in superobesity, which can provide a safer second procedure after effective weight loss over six months. It may be useful particularly in the management of patients with severe obesity.

Mid-term 4-Year Outcomes with Single Anastomosis Duodenal-Ileal Bypass with Sleeve Gastrectomy Surgery at a Single US Center

BACKGROUND

Single anastomosis duodenal-ileal bypass with sleeve gastrectomy (SADI-S) is a modification of Roux-en-Y duodenal switch (RYDS). Long-term data on this operation is lacking in the literature. We reviewed our mid-term data of this RYDS modification.

PURPOSE

To analyze the outcomes with SADI-S at 4 years.

METHODS

Data from patients who underwent a primary SADI-S procedure performed by three surgeons at a single institution from June 2013 through February 2018 were retrospectively reviewed. All revision bariatric surgeries were excluded. Regression analyses were performed for all follow-up weight loss data.

RESULTS

There were 437 patients in our database. The pre-operative mean body mass index (BMI) was 49.8 ± 8.8 kg/m². The 30-day complication rate was 7.7%. The 30-day readmission, reoperation, and mortality rates were 1.8, 1.3, and 0.2%, respectively. The long-term complication rate was 10.9%. Seventy-nine patients were 4 years post SADI-S surgery and follow-up was possible for 44 patients (55.7%). At 4 years, patients had an average change in BMI of 18.1 ± 6 units with an excess weight loss (EWL) of 85.7 ± 27.3%. At 4 years, 97.6% patients were able to maintain HbA1c < 6% with or without the use of diabetic medication. There was a statistically significant difference between most of the pre-operative and post-operative nutritional data.

CONCLUSIONS

SADI-S is a safe and effective procedure in both short- and mid-term data points. Diabetes resolution and weight loss appear similar to traditional RYDS and better than RYGB.

Laparoscopic Conversion from Single Anastomosis Duodeno-Jejunal Bypass with Sleeve Gastrectomy (SADJ-S) to Roux-en-Y Gastric Bypass (GBP): Improving Unsatisfactory Outcomes

Single anastomosis duodeno-ileal bypass with sleeve gastrectomy (SADI-S) can be considered as either a primary procedure or second stage procedure. Malnutrition is rare but could lead to a reversal of the SADI-S. The aim of this manuscript is to present the management and technique of weight regain after proximalization of a SADI-S by converting it to a gastric bypass.

Comparative long-term effectiveness and safety of primary bariatric surgeries in treating type 2 diabetes mellitus in adults: a protocol for systematic review and network meta-analysis of randomised controlled trials

INTRODUCTION

Bariatric surgeries are effective in treating obesity related comorbidities, including type 2 diabetes mellitus. More robust evidence is needed to facilitate choice of procedure. In this systemic review, we aim to investigate the comparative long-term effectiveness in inducing remission of type 2 diabetes, halting diabetic complications, reducing mortality and the safety of conventional and emerging bariatric surgeries.

METHODS AND ANALYSIS

Databases including Cochrane Central Register, EMBASE, MEDLINE and clinical trial registries will be searched for randomised controlled trials with at least 3 years of follow-up, including direct and/or indirect evidence regarding primary bariatric surgeries in overweight or obese adults with type 2 diabetes mellitus, from inception of each database to 2019, with no language or publication type limits imposed. Dual selection of studies, data extraction and risk of bias assessments will be performed. Primary outcomes include full diabetes remission, composite outcome of full or partial diabetes remission and adverse event profiles. Secondary outcomes include anthropometric measurements, cardiovascular risk factor burden, medication burden, diabetic complications and all-cause mortality. Given sufficient homogeneity, network meta-analyses will be performed in a random-effects model based on the Bayesian framework, while assessing for consistency between direct and indirect estimates. Heterogeneities of studies will be explored through meta-regression analysis, and robustness of findings will be checked by sensitivity analysis, and an alternative method under a frequentist framework. All statistical analysis and graphical presentations will be conducted by R software V.3.3.3 (The R Project for Statistical Computing). The overall quality of the evidence will be assessed using the Grading of Recommendations, Assessment, Development and Evaluation criteria for each outcome.

ETHICS AND DISSEMINATION

Ethics approval is not required as individual patient data will not be included. This review will be subject for publication in a peer reviewed journal.

PROSPERO REGISTRATION NUMBER

CRD42018110775.

Comparison of Diabetes Remission and Micronutrient Deficiency in a Mildly Obese Diabetic Rat Model Undergoing SADI-S Versus RYGB

BACKGROUND

Single-anastomosis duodeno-ileal bypass with sleeve gastrectomy (SADI-S) has launched a huge challenge to classic Roux-en-Y gastric bypass (RYGB). Our objective was to compare diabetes remission and micronutrient deficiency in a mildly obese diabetic rat model undergoing SADI-S versus RYGB.

METHODS

Thirty adult male mildly obese diabetic rats were randomly assigned to sham (S), SADI-S, and RYGB groups. Body weight, food intake, fasting plasma glucose (FPG), oral glucose tolerance test (OGTT), plasma insulin, GLP-1, and ghrelin levels were measured at indicated time points. Meanwhile, insulin sensitivity and pancreatic β cell function were assessed during OGTT. Finally, plasma micronutrient evaluation and islet β cell mass analysis were performed after all animals were sacrificed.

RESULTS

As compared to sham, the SADI-S and RYGB groups achieved almost equivalent efficacy in caloric restriction and FPG control without excessive weight loss. During OGTT, the SADI-S and RYGB groups also provided comparable effects on glycemic excursion, insulin sensitivity, and β cell function; however, only rats in the RYGB group showed significant changes in gut hormones, whereas the three groups were found to exhibit no significant difference in β cell mass. In addition, only vitamin E in the RYGB group was deficient as compared with the SADI-S and S groups.

CONCLUSION

In mildly obese diabetic rat, SADI-S and RYGB procedures have comparable efficacy in diabetes remission and risk of micronutrient deficiency. These data show that each of the surgery accomplishes diabetes improvements through both overlapping and distinct mechanisms requiring further investigation.