Proximal duodenal-ileal end-to-side bypass with sleeve gastrectomy: proposed technique

Revisional surgery for malnutrition after SADI-S: prevalence, indications, techniques and outcomes

KEY POINTS

SADIS with short common limb (< 250 cm) is a malabsorptive operation. Reoperation is advised in patients requiring admission for severe malnutrition. Elongation of the common channel is the preferred revisional technique Introduction: Single-Anastomosis Duodeno-Ileal bypass with Sleeve gastrectomy (SADI-S) is a modification of the duodenal switch. Initial common channel's length was 200, and after malnutrition was detected in some patients, it was elongated to 250 or 300 cm. The present study analyzes presentation and treatment of malnutrition after SADI-S.

MATERIALS

Three hundred and thirty-three consecutive patients undergoing SADI-S between May 2007 and February 2019 were included. The common limb length was 200 cm in 50 cases, 250 cm in 211, 300 in 71 and 350 in 1. Thirty-one patients were admitted for severe hypoalbuminemia and 17 patients were submitted to revisional surgery, and constitute the series of our study. Mean weight before reoperation was 57 kg and mean body mass index (BMI) was 21 kg/m2. Mean number of daily bowel movements was 5,6.

RESULTS

Mean time to reoperation was 56 months. The limb was found shorter than expected in 6 cases. Revisional surgery was conversion into a Roux en Y duodenal switch in 3 cases, elongation of the common limb in 11 patients, duodeno-duodenostomy in 1 and duodeno-jejunostomy to the first jejunal loop in 2. Mean weight regain was 14 kg, and mean final BMI 26 kg/m2. Daily bowel movements were reduced to 1,3. Factors related to hypoalbuminemia were hypertension, poor-controlled diabetes, shorter common limb and liver-test alterations.

CONCLUSION

SADI-S is expected to be less malabsorptive than previous biliopancreatic diversions. However, caution must be taken with certain patients to avoid postoperative malnutrition. Adequate follow up with long-term supplementation is required.

Effects of single-anastomosis duodenal-ileal bypass with sleeve gastrectomy on gut microbiota and glucose metabolism in rats with type 2 diabetes

Background

Bariatric and metabolic surgery often leads to significant changes in gut microbiota composition, indicating that changes in gut microbiota after bariatric and metabolic surgery might play a role in ameliorating type 2 diabetes (T2D). However, the effects of single-anastomosis duodenal-ileal bypass with sleeve gastrectomy (SADI-S) on gut microbiota in T2D remain unclear.

Objectives

To investigate the effects of SADI-S on gut microbiota and glucose metabolism in T2D rats.

Methods

Nineteen T2D rats were randomly divided into the SADI-S group (n = 10) and the sham operation with pair-feeding group (sham-PF, n = 9). Fecal samples were collected to analyze the gut microbiota composition with 16S ribosomal DNA gene sequencing. The fasting blood glucose and glycated hemoglobin were measured to evaluate the effects of SADI-S on glucose metabolism.

Results

The Chao and ACE index results indicated the richness of the gut microbial community. The ACE and Chao index values were significantly lower in the SADI-S group than in the sham-PF group, indicating that indicating that species richness was significantly lower in the SADI-S group than in the sham-PF group (p < 0.05). Shannon and Simpson indices were used to estimate the species diversity of the gut microbiota. Compared with the sham-PF group, the SADI-S group showed significantly lower Shannon index and higher Simpson index values, indicating that the species diversity was significantly lower in the SADI-S group than in the sham-PF group (p < 0.05). At the genus level, SADI-S significantly changed the abundances of 33 bacteria, including the increased anti-inflammatory bacteria (Akkermansia and Bifidobacterium) and decreased pro-inflammatory bacteria (Bacteroides). SADI-S significantly decreased the fasting blood glucose and glycated hemoglobin levels. The blood glucose level of rats was positively correlated with the relative abundances of 12 bacteria, including Bacteroides, and negatively correlated with the relative abundances of seven bacteria, including Bifidobacterium.

Conclusion

SADI-S significantly altered the gut microbiota composition of T2D rats, including the increased anti-inflammatory bacteria (Akkermansia and Bifidobacterium) and decreased pro-inflammatory bacteria (Bacteroides). The blood glucose level of rats was positively correlated with the abundances of 12 bacteria, including Bacteroides, but negatively correlated with the relative abundance of 7 bacteria, including Bifidobacterium. These alternations in gut microbiota may be the mechanism through which SADI-S improved T2D. More studies should be performed in the future to validate these effects.

Analysis of the 1-year efficacy of four different surgical methods for treating Chinese super obese (BMI ≥ 50 kg/m2) patients

This study aimed to retrospectively analyze the perioperative and postoperative follow-up data of patients with super obesity who had undergone RYGB, SG, BPD/DS, and SADI-S. A retrospective observational study was conducted to analyze the perioperative and postoperative follow-up data of 60 patients with super obesity who had undergone bariatric surgery. A total of 34 men and 26 women were included in this study. The participants had an average preoperative BMI of 53.81 ± 3.25 kg/m2. The body weight and BMI of all four patient groups decreased significantly at 3, 6, and 12 months postoperatively compared with the preoperative values. Additionally, the TWL (%) and EWL (%) of all four groups increased gradually over the same period. Compared with the preoperative values, the systolic and diastolic blood pressure, glycosylated hemoglobin, uric acid, triglycerides, and total cholesterol decreased to varying degrees in the four groups 1 year postoperatively. RYGB, SG, BPD/DS, and SADI-S are all safe and effective in treating super obese patients and improving their metabolic diseases to a certain extent.

Telementoring Experience for Complex Bariatric Operation-Laparoscopic Single-Anastomosis Duodeno-Ileal Bypass with Sleeve Gastrectomy (SADI-S)

In a groundbreaking surgical collaboration, a team of surgeons in Lithuania successfully performed the first single-anastomosis duodeno-ileal bypass with sleeve gastrectomy (SADI-S) operation under the remote telemonitoring guidance of a highly experienced surgeon from Spain.The Lithuanian surgical team, comprising skilled bariatric surgeons, meticulously prepared for the SADI-S operation under the remote guidance of their Spanish proctor. Utilizing video conferencing and real-time communication, the mentor provided step-by-step instructions, shared insights, and addressed any concerns during the procedure. The mentor's extensive experience and guidance ensured a safe and successful surgical outcome.This innovative approach not only demonstrates the potential of telemedicine in the field of complex bariatric surgeries but also highlights the power of international cooperation in advancing surgical techniques and patient care by using modern methods of telemedicine and proctorship.

Evaluation study of single-anastomosis duodenal-ileal bypass with sleeve gastrectomy in the treatment of Chinese obese patients based on efficacy and nutrition

To evaluate the efficacy and nutrition of single-anastomosis duodenal-ileal bypass with sleeve gastrectomy (SADI-S) in Chinese obese patients in the first postoperative year. Clinical data of 66 obese patients who underwent SADI-S surgery at China-Japan Union Hospital of Jilin University from November 2018 to May 2022 were retrospectively collected. The weight, body mass index (BMI), percentage of excess weight loss (%EWL), and percentage of total weight loss (%TWL) were recorded at 3, 6, and 12 months after surgery. Moreover, metabolic disease remission and nutrient deficiencies were assessed at 1 year postoperatively. Overall, 66 patients (38 males and 28 females) were recruited, with a mean age of 35 (18-61) years and an average preoperative BMI of 42.94 kg/m2. Before surgery, 38 patients had type 2 diabetes mellitus (T2DM), 46 patients had hyperuricemia (HUA), 45 patients had hypertension (HTN), 35 patients had hyperlipidemia, 12 patients had hypercholesterolemia, 12 patients had hyper-low-density lipoproteinemia, and 14 patients had gastroesophageal reflux disease symptoms (GERD). All patients had undergone a DaVinci robotic or laparoscopic SADI-S surgery, and none converted to laparotomy or died. Four patients developed postoperative complications and were cured and discharged after conservative treatment or surgical treatment. At 3, 6 and 12 months, the average %EWL was 62.07 ± 26.56, 85.93 ± 27.92, and 106.65 ± 29.65%, %TWL was 22.67 ± 4.94, 32.10 ± 5.18, and 40.56 ± 7.89%, respectively. Fasting blood glucose (FBG), glycated hemoglobin (HbA1c), uric acid (UA), triglycerides (TG), blood pressure (BP), and other indexes were significantly lower after one year post-surgery compared with the preoperative period (P < 0.05). The remission rates of T2DM, HUA, HTN, hypertriglyceridemia, hypercholesterolemia, and hyper-low-density lipoproteinemia 1 year after surgery were 100, 65.2, 62.2, 94.3, 100, and100%, respectively. One year after surgery, the remission rate of GERD was 71.4% (10/14), the rate of new occurrence of GERD was 12.1% (8/66), and the overall incidence rate was 18.2% (12/66). Except for vitamin B12(vit B12), the other nutrient indexes were significantly decreased after 1 year of surgery relative to levels before surgery (P < 0.05). The deficiency rates for vitamin A (vit A), vitamin E (vit E), zinc ion (Zn), and folic acid (FA) were higher (45.5, 25.8, 24.2, and 16.7%, respectively); however, there were no related clinical symptoms. SADI-S had significant effects on weight loss and metabolic disease remission. The main nutrient deficiencies after SADI-S were vit A, vit E, Zn, and FA deficiencies. The long-term efficacy and safety of SADI-S warrant further follow-up.

Single Anastomosis Duodenoileostomy with Sleeve: A Comprehensive Review of Anatomy, Surgical Technique, and Outcomes

PURPOSE OF REVIEW

Single anastomosis duodenoileal bypass with sleeve (SADI-S) is a recently endorsed metabolic and bariatric surgery (MBS) procedure in the US. Despite its favorable characteristics, the utilization of SADI-S remains limited, accounting for a mere 0.25% of all MBS procedures performed. This review aims to offer an updated examination of the technique, while also presenting the safety and outcomes associated with SADI-S on both the short and long term.

RECENT FINDINGS

The safety of SADI-S is well-established, with short-term complication rates as low as 2.6%. A common channel length of 300 cm has consistently shown a lower incidence of malabsorption complications compared to shorter lengths. Bile reflux after SADI-S is relatively rare with an incidence of only 1.23%. SADI-S demonstrated sustained total weight loss (%TWL) at 5 years (37%) and 10 years (34%) postoperatively. Resolution of weight-related medical conditions was also significant after SADI-S, with remission rates of diabetes mellitus as high as 86.6% with over 5 years of follow-up. SADI-S is a safe and effective MBS procedure that has shown impressive and sustainable results in terms of weight loss and improvement in obesity-related medical conditions. Careful limb length selection is essential in minimizing the risk of nutritional deficiencies. SADI-S holds great promise as a valuable option for individuals seeking effective weight loss and improvement in associated health conditions.

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 with sleeve gastrectomy improves lipid and glucose homeostasis in ob/ob mice

OBJECTIVE

The objective of this study was to compare the general and metabolic impact of single-anastomosis duodeno-ileal bypass with sleeve gastrectomy (SADI-S) with Roux-en-Y gastric bypass (RYGB) in an obese (ob/ob) mouse model.

METHODS

10-week-old male ob/ob mice underwent either SADI-S, RYGB, or laparotomy surgery (Sham group). General and metabolic parameters were assessed during a 5-week period thereafter.

RESULTS

SADI-S induced a deeper weight loss ([mean ± SEM] -41.2% ± 3.3%) than RYGB (-5.6% ± 3.5%, p < 0.001) compared with the Sham group (+6.3% ± 1.0%, p < 0.05). A significant food restriction was observed after SADI-S only (-31%, 117.4 ± 10.3 g vs. 170.2 ± 5.2 g of food at day 35 in Sham group mice, p < 0.001). Random-fed glycemia and glucose tolerance were more improved after SADI-S than RYGB. SADI-S decreased plasma cholesterol concentration by 60% (0.49 ± 0.04 g/L vs. 1.40 ± 0.10 g/L in the Sham group at day 35, p < 0.01), significantly more than RYGB (1.04 ± 0.14 g/L, p = 0.018). Plasma sitosterol/cholesterol and campesterol/cholesterol ratios were decreased after SADI-S, suggesting a reduced intestinal cholesterol absorption. SADI-S increased exogenous plasma cholesterol-D7 clearance and fecal elimination, also indicating an increased plasma cholesterol excretion. Studying a pair-fed group demonstrated that calorie restriction alone did not explain the beneficial impact of SADI-S.

CONCLUSIONS

SADI-S is associated with a greater improvement in lipid and glucose homeostasis than RYGB in ob/ob mice.

Laparoscopic Sleeve Gastrectomy plus Duodenojejunal Bypass: Learning Curve Analysis and Technical Feasibility of Duodenojejunostomy Using Linear Stapler

INTRODUCTION

Laparoscopic sleeve gastrectomy plus duodenojejunal bypass (LSG-DJB) has emerged as an alternative bypass surgery. Despite its potential benefits, the technical challenges of the procedure have limited its adoption. This study aims to present the learning curve for LSG-DJB and explore potentially beneficial technical modifications for the standardization of the procedure.

METHODS

The study retrospectively analyzed 100 patients who underwent LSG-DJB as a primary procedure from July 2014 through September 2021. Baseline characteristics, weight loss outcomes, remission of metabolic diseases, and perioperative complications were assessed. The operative time was analyzed across both time trends and anastomosis type subgroups.

RESULTS

At 1-year follow-up after LSG-DJB, the mean %total weight loss and the mean BMI loss were 25.38 ± 8.58% and 9.38 ± 4.25 kg/m2, respectively. Remission rates for type 2 diabetes, hypertension, and dyslipidemia were 72.0% (67/93), 84.1% (37/44), and 70.3% (52/74), respectively. In the analysis of operative time, the learning curve exhibited a plateau after 25 cases. The mean operative time was 136.00 ± 21.64 min in the stapled anastomosis group, and 150.62 ± 25.42 min in the hand-sewn anastomosis group.

CONCLUSION

The learning curve for LSG-DJB plateaued after 25 cases. In the LSG-DJB procedure, stapled duodenojejunal anastomosis is feasible and achieves similar outcomes to the hand-sewn method.

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.

The use of a total bowel length measurement protocol may reduce reoperations and complications after single-anastomosis duodenal switch

INTRODUCTION

Most surgeons who perform single-anastomosis duodeno-ileal switches (SADI-S) use a pre-determined common channel length without measuring total bowel length (TBL). However, TBL varies between patients, and a standardized common channel length could contribute to malabsorptive complications and reoperations following SADI-S. The purpose of this study was to determine whether using a TBL measurement protocol to individualize common channel length would be associated with reduced reoperations and complications.

METHODS

A prospectively maintained data registry was retrospectively reviewed to identify all patients who underwent SADI-S between September 2017 and February 2022. In April 2021, we began using TBL measurements during SADI-S with 40% of the TBL used as the length for the common channel. Outcomes pre-TBL and post-TBL measurement protocol were compared.

RESULTS

A total of 119 SADI-S recipients (59 pre-TBL; 60 post-TBL) were included. The pre-TBL group had a higher frequency of reoperations (23.7% vs 1.7%, p < 0.001) and late complications (29.3% vs 3.3%, p < 0.001). The mean time to reoperation was 13.7 months in the pre-TBL group and 6.7 months in the post-TBL group (p = 0.347). Patients in the post-TBL group had significantly higher serum albumin levels at 3 months (4.2 g/dL vs 3.5 g/dL, p < 0.001), 6 months (4.1 g/dL vs 3.6 g/dL, p < 0.001), and 12 months (4.2 g/dL vs 3.8 g/dL, p = 0.023) postoperatively when compared to the pre-TBL group.

CONCLUSION

Using TBL measurements to individualize common channel length was associated with a significant reduction in reoperations and late complications following SADI-S.

Single Anastomosis Duodenal Switch versus Classic Duodenal Switch: Long-term Outcomes from a Prospective Comparative Cohort Study

PURPOSE

The literature on long-term outcomes of duodenal switch (DS) compared to single anastomosis duodenal switch (SADI-S) procedures is lacking. We evaluated the long-term outcomes of SADI-S compared to those after the classic DS procedure.

METHODS

This is a follow-up report from a single-institution prospective cohort study comparing long-term outcomes of SADI-S versus DS both as one- and two-stage procedures (ClinicalTrials.gov: NCT02792166). Data is depicted as count (percentage) or median (interquartile range).

RESULTS

Forty-two patients underwent SADI-S, of whom 11 had it as a second-stage procedure (26%). Of 20 patients who underwent DS, twelve had it as a second-stage procedure (60%). Both groups were similar at baseline. Median follow-up times for one-stage SADI-S and DS were 57 (24) and 57 (9) months, respectively (p = 0.93). Similar BMI reductions were observed after one-stage SADI-S (16.5 kg/m2 [8.5]) and DS (18.9 kg/m2 [7.2]; p = 0.42). At median follow-up of 51 (21) and 60 (15) months after second-stage SADI-S and DS, respectively (p = 0.60), surgical procedures yielded reductions in BMI of 20.5 kg/m2 (14.0) and 24.0 kg/m2 (13.9), respectively (p = 0.52). Follow-up rates were similar for one-stage (≥ 88%; p = 0.29) and second-stage procedures (≥ 83%; p = 0.16). Similar diabetes and hypertension remissions were found (p = 0.77; P = 0.54, respectively). Despite fat-soluble vitamin deficiencies at baseline, after supplementation, they were either eliminated or less prevalent long-term after SADI-S. Daily bowel movements were also less frequent.

CONCLUSIONS

Long-term weight and comorbidity outcomes after SADI-S are similar to those of DS both as one- and two-stage surgeries. SADI-S procedure may allow for similar beneficial outcomes with less burden from gastrointestinal symptoms and fat-soluble vitamin deficiencies.

Comparison of Single Versus Double Anastomosis Bariatric Metabolic Surgery in Obesity: a Systematic Review and Meta-analysis

Major BMS are modified through loop rather than Roux-en-Y type reconstruction recently, and this study systematically reviews the BMS from the perspective of SA (single anastomosis) and DA (double anastomosis) procedures, aiming to research the differences among bariatric procedures. A total of 39 studies compared SA- and DA-BMS were finally eligible for analysis after searching in PubMed, Web of Science, and Cochrane Library. Compared with DA, SA shortens operative time and decreases complications especially obstruction, internal hernia, and reoperation. SA-GB (gastric bypass) has significantly higher %TWL and T2DM remission rate than DA-GB 1- and 5-year postoperatively. SA-DS (duodenal switch) has similar 1-year %TWL and lower 5-year %TWL, and comparable 1- and 5-year T2DM remission with DA-DS. SA provides significant advantages about simplicity and safety. This, together with the shorter learning curve, makes SA a promising choice.

BRAZILIAN MULTI-SOCIETY POSITION STATEMENT ON EMERGING BARIATRIC AND METABOLIC SURGICAL PROCEDURES

This Brazilian multi-society position statement on emerging bariatric and metabolic surgical procedures was issued by the Brazilian Society of Bariatric and Metabolic Surgery (SBCBM), the Brazilian College of Digestive Surgery (CBCD), and the Brazilian College of Surgeons (CBC). This document is the result of a Brazilian Emerging Surgeries Forum aimed at evaluating the results of surgeries that are not yet listed in the Federal Council of Medicine (CFM), the regulatory agency that oversees and regulates medical practice in Brazil. The Forum integrated more than 400 specialists and academics with extensive knowledge about bariatric and metabolic surgery, representing the three surgical societies: SBCBM, CBC, and CBCD. International speakers participated online and presented their experiences with the techniques under discussion, emphasizing the regulatory policies in their countries. The indications for surgery and the subsequent procedures were carefully reviewed, including one anastomosis gastric bypass (OAGB), single anastomosis duodeno-ileal with sleeve gastrectomy (SADI-S or OADS), sleeve gastrectomy with transit bipartition (SGTB), and sleeve gastrectomy with ileal interposition (SGII). The recommendations of this document are based on an extensive literature review and discussions among bariatric surgery specialists from the three surgical societies. We concluded that patients with a body mass index over 30 kg/m2 may be candidates for metabolic surgery in the presence of comorbidities (arterial hypertension and type 2 diabetes) with no response to clinical treatment of obesity or in the control of other associated diseases. Regarding the surgical procedures, we concluded that OAGB, OADS, and SGTB are associated with low morbidity rates, satisfactory weight loss, and resolution of obesity-related comorbidities such as diabetes and arterial hypertension. SGII was considered a good and viable promising surgical alternative technique. The recommendations of this statement aim to synchronize our societies with the sentiments and understandings of most of our members and also serve as a guide for future decisions regarding bariatric surgical procedures in our country and worldwide.

Obesity management for cardiovascular disease prevention

Background

Obesity is a complex disease that leads to higher morbidity and mortality and its rate in the United States is rapidly rising. Targeting obesity management is one of the cornerstones of preventive medicine. Early intervention can significantly reduce the risk of developing cardiovascular disease. While it is well known that lifestyle interventions such as healthful nutrition and routine physical activity are the first and most important step in management, some do not achieve the desired results and require further therapies.

Methods

A literature review was conducted, that included clinical documents, public scientific citations and peer review articles to evaluate anti-obesity medications, endoscopic procedures and bariatric surgeries in the management of obesity. We also included effects of these interventions on weight loss, cardiovascular disease risk reduction and side effects.

Results

This clinical review summarizes recent evidence for the different approaches in obesity management including medications, common endoscopic procedures and bariatric surgeries. For more detailed review on the different management options discussed, we recommend reviewing Obesity Medicine Association Clinical Practice Statement [1].

Conclusion

Management of obesity reduces cardiovascular risk, improves metabolic parameters and other important health outcomes. Different management approaches are available, hence, a high level of awareness of the growing epidemic of obesity is needed to ensure timely referrals to obesity medicine specialists.

Marginal Ulcer and Dumping Syndrome in Patients after Duodenal Switch: A Multi-Centered Study

BACKGROUND

The current design of biliopancreatic diversion with duodenal switch (BPD/DS) and single anastomosis duodenal-ileal bypass with sleeve (SADI-S) emphasizes the importance of the pylorus' preservation to reduce the incidence of marginal ulcer (MU) and dumping. However, no institutional studies have yet reported data on their prevalence. We aimed to assess the incidence of MU and dumping after duodenal switch (DS) and identify the associative factors.

METHODS

A multi-center review of patients who underwent BPD/DS or SADI-S between 2008 and 2022. Baseline demographics, symptoms, and management of both complications were collected. Fisher's exact test was used for categorical variables and the independent t-test for continuous variables.

RESULTS

A total of 919 patients were included (74.6% female; age 42.5 years; BMI 54.6 kg/m2) with mean follow-up of 31.5 months. Eight patients (0.9%) developed MU and seven (0.8%) had dumping. Patients who developed MU were more likely to be using non-steroidal anti-inflammatory drugs (NSAID) (p = 0.006) and have a longer operation time (p = 0.047). Primary versus revisional surgery, and BDP/DS versus SADI-S were not associated with MU or dumping.

CONCLUSIONS

The incidences of MU and dumping after DS were low. NSAID use and a longer operation time were associated with an increased risk of MU, whereas dumping was attributed to poor dietary habits.

First-in-Human Side-to-Side Magnetic Compression Duodeno-ileostomy with the Magnet Anastomosis System

PURPOSES

Classical gastrointestinal anastomoses are formed with sutures and/or metal staples, resulting in significant bleeding and leak rates. This study evaluated the feasibility and safety of the novel magnet anastomosis system (MS) to create a side-to-side duodeno-ileal (DI) diversion for weight loss and type 2 diabetes (T2D) resolution.

MATERIALS AND METHODS

Patients with severe obesity (body mass index (BMI) ≥ 35 kg/m2 with/without T2D (HbA1C ≥ 6.5%)) underwent the study procedure, a side-to-side MS DI diversion, with a standard sleeve gastrectomy (SG). A linear magnet was delivered by flexible endoscopy to a point 250 cm proximal to the ileocecal valve; a second magnet was positioned in the first part of the duodenum; the bowel segments containing magnets were apposed, initiating gradual anastomosis formation. Laparoscopic assistance was used to obtain bowel measurements, obviate tissue interposition, and close mesenteric defects.

RESULTS

Between November 22 and 26, 2021, 5 female patients (mean weight 117.6 ± 7.1 kg, BMI (kg/m2) 44.4 ± 2.2) underwent side-to-side MS DI + SG. All magnets were successfully placed, expelled without re-intervention, and formed patent durable anastomoses. Total weight loss at 12 months was 34.0 ± 1.4% (SEM); excess weight loss, 80.2 ± 6.6%; and BMI reduction, 15.1. Mean HbA1C (%) dropped from 6.8 ± 0.8 to 4.8 ± 0.2; and glucose (mg/dL), from 134.3 ± 17.9 to 87.3 ± 6.3 (mean reduction, 47.0 mg/dL). There was no anastomotic bleeding, leakage, obstruction, or infection and no mortality.

CONCLUSIONS

Creation of a side-to-side magnetic compression anastomosis to achieve duodeno-ileostomy diversion in adults with severe obesity was feasible and safe, achieved excellent weight loss, and resolved type 2 diabetes at 1-year follow-up.

TRIAL REGISTRATION

Clinicaltrials.gov Identifier: NCT05322122.

Clinical outcomes and complications of single anastomosis duodenal-ileal bypass with sleeve gastrectomy: A 2-year follow-up study in Bogotá, Colombia

BACKGROUND

The global prevalence of obesity has increased over the past 40 years, and bariatric surgery has proven to be the most effective therapy for long-term weight loss. Its principles are based on modifying the brain-gut axis by altering the gastrointestinal anatomy and affecting the function of gastrointestinal hormones, thereby modifying satiety signals. Single anastomosis duodeno-ileal bypass with sleeve gastrectomy (SADI-S) combines both techniques and has become an alternative to gastric bypass and biliopancreatic diversion procedures for treating severe obesity and associated metabolic diseases in selected patients.

AIM

To describe the outcomes and complications of SADI-S.

METHODS

We retrospectively analyzed the data of patients who underwent SADI-S laparoscopically at the Clínica Reina Sofía in Bogotá, Colombia. This study assessed the therapeutic effectiveness of SADI-S in terms of short-term preoperative clinical characteristics, postoperative complications, comorbidities, nutritional defi-ciencies, and intraoperative complications during a 2-year follow-up.

RESULTS

Sixty-one patients with a mean body mass index (BMI) of 50 ± 7.1 kg/m2 underwent laparoscopic SADI-S. The mean operative time and hospital stays were 143.8 ± 42 min and 2.3 ± 0.8 d, respectively. The mean follow-up period was 18 mo, and the mean BMI decreased to 28.5 ± 12.2 kg/m2. The excess BMI loss was 41.8% ± 13.5%, and the weight loss percentage was 81.1% ± 17.0%. Resolution of obesity-related comorbidities, including type 2 diabetes mellitus, hypertension, dyslipidemia, and obstructive sleep apnea, was achieved and defined as complete or partial remission. No intraoperative complications were observed. Short-term complications were observed in four (6.8%) patients. However, larger studies with longer follow-up periods are required to draw definitive conclusions.

CONCLUSION

SADI-S has a low intraoperative and postoperative complication rate and is effective for weight loss and improving obesity-related comorbidities, including hypertension, type 2 diabetes mellitus, dyslipidemia, and sleep apnea syndrome.

Comparison of Efficacy and Safety Between Roux-en-Y Gastric Bypass (RYGB) vs One Anastomosis Gastric Bypass (OAGB) vs Single Anastomosis Duodeno-ileal Bypass with Sleeve Gastrectomy (SADI-S): a Systematic Review of Bariatric and Metabolic Surgery

In recent years, combined restrictive and hypo-absorptive procedures have gained widespread acceptance. The rationale of this systematic review is to compare the safety and efficacy between Roux-en-Y gastric bypass (RYGB), one anastomosis gastric bypass (OAGB) and single anastomosis duodeno-ileal bypass with sleeve gastrectomy (SADI-S). Eighteen eligible studies were finalized for this review. Weight loss outcomes were greater with SADI-S (5 years) and OAGB (10 years). SADI-S offered better resolution of diabetes whereas hypertension and dyslipidaemia resolution were better with OAGB. Although early complications and mortality were higher with SADI-S, late complications were more frequent with RYGB. Both SADI-S and OAGB are as effective as RYGB for weight loss, but OAGB offers lesser complications. However, more data is imperative to determine the next gold standard procedure.

The impact of microbially modified metabolites associated with obesity and bariatric surgery on antitumor immunity

Obesity is strongly associated with the occurrence and development of many types of cancers. Patients with obesity and cancer present with features of a disordered gut microbiota and metabolism, which may inhibit the physiological immune response to tumors and possibly damage immune cells in the tumor microenvironment. In recent years, bariatric surgery has become increasingly common and is recognized as an effective strategy for long-term weight loss; furthermore, bariatric surgery can induce favorable changes in the gut microbiota. Some studies have found that microbial metabolites, such as short-chain fatty acids (SCFAs), inosine bile acids and spermidine, play an important role in anticancer immunity. In this review, we describe the changes in microbial metabolites initiated by bariatric surgery and discuss the effects of these metabolites on anticancer immunity. This review attempts to clarify the relationship between alterations in microbial metabolites due to bariatric surgery and the effectiveness of cancer treatment. Furthermore, this review seeks to provide strategies for the development of microbial metabolites mimicking the benefits of bariatric surgery with the aim of improving therapeutic outcomes in cancer patients who have not received bariatric surgery.

Very Low-Calorie Ketogenic Diet (VLCKD) as Pre-Operative First-Line Dietary Therapy in Patients with Obesity Who Are Candidates for Bariatric Surgery

Bariatric surgery is currently the most effective method for achieving long-term weight loss and reducing the risk of comorbidities and mortality in individuals with severe obesity. The pre-operative diet is an important factor in determining patients' suitability for surgery, as well as their post-operative outcomes and success in achieving weight loss. Therefore, the nutritional management of bariatric patients requires specialized expertise. Very low-calorie diets and intragastric balloon placement have already been studied and shown to be effective in promoting pre-operative weight loss. In addition, the very low-calorie ketogenic diet has a well-established role in the treatment of obesity and type 2 diabetes mellitus, but its potential role as a pre-operative dietary treatment prior to bariatric surgery has received less attention. Thus, this article will provide a brief overview of the current evidence on the very low-calorie ketogenic diet as a pre-operative dietary treatment in patients with obesity who are candidates for bariatric surgery.

Laparoscopic Conversion of Single-Anastomosis Duodenal Switch (SADI-S) to Roux-en-Y Gastric Bypass With Concurrent Paraesophageal Hernia Repair for Refractory Biliary Reflux and Paraesophageal Hernia

Single-anastomosis duodenal switch (SADI-S) is effective for weight loss with low reported rates of complications. Bile reflux into the stomach or esophagus is an uncommonly reported complication but can lead to significant symptoms for patients suffering from this complication. Concurrent paraesophageal hernia can exacerbate the symptoms of biliary reflux gastritis. We present a case report describing the management of biliary reflux gastritis with concurrent paraesophageal hernia, our decision-making process, and technical pearls and possible pitfalls.

Patient-Reported Outcomes and Quality of Life After Single-Anastomosis Duodeno-ileal Bypass with Sleeve Gastrectomy (SADI-S): a Cross-Sectional Study with 283 Patients from a Single Institution

INTRODUCTION

Single-anastomosis duodeno-ileal bypass with sleeve gastrectomy (SADI-S) is a safe and effective technique with good short- and mid-term weight control and associated medical problems remission for patients with a body mass index (BMI) > 45 kg/m². The aim of this study was to analyze patient-reported symptoms, specifically symptomatic gastroesophageal reflux disease symptoms (GERD), depositional habit, and quality of life (QOL) following SADI-S, using telemedicine and validated tests.

METHODS

A prospective unicentric cross-sectional study was conducted including all patients submitted to SADI-S in the University Hospital of Bellvitge from May 2014 to September 2019. A baseline control group was composed of 67 patients who were planning to undergo SADI-S in the following 4 months. Patients were divided into four groups: pre-SADIS, < 2 years, 2-3 years, and > 3 years after surgery. The information gathered via a telematic questionnaire was analyzed and compared with its presence in patients' clinical history derived from the last presential visit.

RESULTS

The response rate to telematic tests was 86.9%. The mean BMI exhibited significant differences depending on the moment of evaluation: 50.8 kg/m², 30.0 kg/m², 31.1 kg/m², and 32.7 kg/m² at pre-SADIS, < 2, 2-3, and > 3 years follow-up, respectively (p < 0.001). The proportion of GERD symptoms increased over time (17.9%, 18.8%, 26.9%, and 30.2%, p = 0.320). After SADIS, the percentage of patients with loose stools was progressively higher (17.4% vs 25.4% vs 30.2%, p = 0.04). Patients with < 2-year follow-up presented an improvement in both physical component (PCS) and mental component (MCS) summaries compared to the baseline group (PCS = 51.3, and MCS = 49.4). The mean BMI of patients with PCS ≥ 50 was 31.9 kg/m², compared with 41.7 kg/m² in the PCS < 50 group (p < 0.001). In the MCS ≥ 50 group, there were more patients with a BMI < 35 kg/m² than the MCS < 50 group (66.7% vs 48.7%, p = 0.004). Telematic follow-up offered a more systemic and detailed information: in the last presential visit only, 13.9% of patients had complete data regarding weight evolution, remission of associated medical problems, GERD symptoms, and depositional habit in comparison with the 82.9% of patients with telematic follow-up (p < 0.001).

CONCLUSION

Weight control is the main factor related to long-term QOL after SADI-S. The incidence of GERD symptoms and diarrhea was up to 30% in patients with > 3-year follow-up. Monitoring postoperative patient-related symptoms with validated objective tests seems a feasible and useful resource for the long-term follow-up of patients submitted to SADI-S.

Are SADI-S and BPD/DS bariatric procedures identical twins or distant relatives? - A case report

Given the common anatomical features and similar short-term weight loss outcomes, Biliopancreatic Diversion with Duodenal Switch (BPD/DS) and Single-Anastomosis Duodenoileal bypass with Sleeve gastrectomy (SADI-S) are considered identical bariatric procedures, apart from technical complexity being lower for SADI-S. In the absence of prospective randomized trials or long-term comparative studies the rationale for choosing between procedures is hampered. Post-bariatric hormonal profiles could contribute to understand the underlying mechanisms and potentially be used as a decision aid when choosing between procedures. The main aim of this study was to compare the outcomes of BPD/DS and SADI-S, in genetically identical individuals exposed to similar environmental factors. Two identical twin (T) female patients, one submitted to BPD/DS (T_BPD/DS) and another to SADIS-S (T_SADI-S) were followed up to one year after surgery. Before surgery and at 3, 6 and 12 months after surgery, both patients underwent mixed meal tolerance tests (MMTT) to evaluate postprandial glucose, glucagon and GLP-1 response. In addition, 3 months after surgery, glucose dynamics were assessed using a Flash Glucose Monitoring (FGM) system for 14 days. The percentage of total weight loss (%TWL) was higher for T_BPD/DS compared to T_SADI-S (34.03 vs 29.03 %). During MMTT, T_BPD/DS presented lower glucose, glucagon, insulin and C-peptide excursions at all timepoints when compared to SADI-S; along with a greater percentage of time within the low glucose range (55.97 vs 39.93 %) and numerically lower glucose variability indexes on FGM (MAG change:0.51 vs 0.63 mmol/l×h^-1). In patients with the same genetic background, BPD/DS was shown to result in greater weight loss than SADI-S. The differences in glucose and enteropancreatic hormone profiles observed after BPD/DS and SADI-S suggest that different mechanisms underlie weight loss.

Medium-Term Nutritional and Metabolic Outcome of Single Anastomosis Duodeno-Ileal Bypass with Sleeve Gastrectomy (SADI-S)

INTRODUCTION

Single Anastomosis Duodenal-Ileal Bypass with Sleeve Gastrectomy (SADI-S), like other hypoabsorptive procedures, could be burdened by long-term nutritional deficiencies such as malnutrition, anemia, hypocalcemia, and hyperparathyroidism.

OBJECTIVES

We aimed to report our experience in terms of mid-term (2 years) bariatric, nutritional, and metabolic results in patients who underwent SADI-S both as a primary or revisional procedure.

METHODS

One hundred twenty-one patients were scheduled for SADI-S as a primary or revisional procedure from July 2016 to February 2020 and completed at least 2 years of follow-up. Demographic features, bariatric, nutritional, and metabolic results were analyzed during a stepped follow-up at 3 months, 6 months, 1 year and 2 years.

RESULTS

Sixty-six patients (47 female and 19 male) were included. The median preoperative BMI was 53 (48-58) kg/m². Comorbidities were reported in 48 (72.7%) patients. At 2 years, patients had a median BMI of 27 (27-31) kg/m² (p < 0.001) with a median %EWL of 85.3% (72.1-96.1), a TWL of 75 (49-100) kg, and a %TWL of 50.9% (40.7-56.9). The complete remission rate was 87.5% for type 2 diabetes mellitus, 83.3% for obstructive sleep apnea syndrome and 64.5% for hypertension. The main nutritional deficiencies post SADI-S were vitamin D (31.82%) and folic acid deficiencies (9.09%).

CONCLUSION

SADI-S could be considered as an efficient and safe procedure with regard to nutritional status, at least in mid-term (2 years) results. It represents a promising bariatric procedure because of the excellent metabolic and bariatric outcomes with acceptable nutritional deficiency rates. Nevertheless, larger studies with longer follow-ups are necessary to draw definitive conclusions.

Efficacy and safety of single-anastomosis duodenal-ileal bypass with sleeve gastrectomy for the treatment of Chinese T2D patients with obesity

BACKGROUND

Bariatric surgery is the most effective treatment for obese T2D. As one of the most effective bariatric surgeries, SADI-S was recently introduced in China, and there is limited evidence of its efficacy and safety in the treatment of obese T2D. The aim of this study is to investigate the safety and efficacy of SADI-S in the treatment of obese T2D in China.

METHODS

The clinical data of 32 obese T2D patients who underwent SADI-S was included in this study. Changes in weight-related indicators, diabetes-related indicators, and patient nutritional outcomes were analyzed.

RESULTS

SADI-S was conducted successfully in all of the 32 cases without conversion to laparotomy or death. The incidence of surgical complications was 15.6% (5/32). The major complication rate was 6.3% (2/32). At 1 year after surgery, the BMI (kg/m²) significantly decreased from 40.8 ± 7.4 to 23.9 ± 2.9 (P < 0.05) and the mean HbA1c significantly decreased from 8.5% (6.4-11.5) to 5.0% (3.8-5.6) (P < 0.05). At 2 years after surgery, the BMI (kg/m²) significantly decreased to 24.9 ± 2.4 (P < 0.05) and the mean HbA1c significantly decreased to (4.8 ± 0.4)% (P < 0.05). The %TWL was (40.4 ± 6.5)% and (42.9 ± 4.9)% at 1 year and 2 years, respectively. The complete remission rates for T2D were both 100% at 1 year and 2 years. Triglyceride levels were significantly improved compared with preoperative, from (3.2 ± 3.0) mmol/L to (1.0 ± 0.3) mmol/L (P < 0.05), but there was no significant difference in other nutritional outcomes.

CONCLUSION

The SADI-S has excellent curative effect in the treatment of Chinese obese T2D, but the operation is challenging and the complication rate is high. Its long-term efficacy and safety require further study.

Robotic vs laparoscopic approach for single anastomosis duodenal-ileal bypass with sleeve gastrectomy: a propensity score matching analysis

Biliopancreatic diversion with duodenal switch and single anastomosis duodenal-ileal bypass with sleeve gastrectomy (SADI-S) are technically demanding hypo-absorptive bariatric procedures. They are often indicated in superobese patients (BMI ≥ 50 kg/m²), as robotic platform could improve ergonomics against a thick abdominal wall, preventing bending of instruments and simplifying hand-sewn anastomoses. We aimed to report our experience with robotic SADI-S (R-group) and to compare outcomes with the laparoscopic (L-group) approach. Among 2143 patients who underwent bariatric procedures at our institution between July 2016 and June 2021, 116 (5.4%) consenting patients were scheduled for SADI-S as primary or revisional procedure: 94 L-group, 22 R-group. R-group and L-group patients were matched using PSM analysis to overcome patients selection bias. Postoperative complications, operative time (OT), post-operative stay (POS) and follow-up data were compared. After PSM, 44 patients (22 patients for each group) were compared (Chi-square 0.317, p = 0.985). Median age, gender, median BMI, preoperative rates of comorbidities, previous abdominal bariatric and non-bariatric surgeries and type of surgical procedures (SADI-S/SADI) were comparable. Median OT was shorter in the L-group (130 Vs 191 min, p < 0.001). 30-days' re-operative complications and late complications rates were comparable. At 25-months' mean follow-up, the median Percentage Excess Weight Loss (72%) was comparable between the groups (p = 0.989). L-group and R-group were comparable in terms of re-operative complication rate and short-term outcomes. The robotic platform may increase the rate of single step procedure in challenging cases. Larger studies with longer follow-up and cost-analysis are necessary to draw definitive conclusions.

Based on Propensity Matching Scores: Comparison of the Efficacy of Two Kinds of Bariatric Surgery for Obese Type 2 Diabetes

PURPOSE

To compare the efficacy of OADS and SG in treating obese T2D in China.

MATERIALS AND METHODS

We included 99 obese Chinese patients with T2D undergoing OADS or SG with a 1-year postoperative follow-up from January 2014 to October 2021. Using the propensity score matching (PSM) method, patients from both groups were matched 1:1. Outcomes for losing weight, controlling diabetes, and nutrition were then determined.

RESULTS

There were 32 patients in each group after using the PSM method, and there was no statistically significant difference between the two groups in terms of all the baseline indicators (P > 0.05). When comparing weight loss outcomes, the OADS group outperformed the SG group in terms of change in BMI and %TWL, with statistically significant differences [15.0 (8.1-26.6) kg/m², 10.0 (4.10-23.5) kg/m² P = 0.001; 38.5% ± 6.7%, 29.5% ± 9.4%, P = 0.000]. When comparing the efficacy of diabetes, the OADS group outperformed the SG group in terms of HbA1C and complete remission of diabetes, with statistically significant differences [5.1 (3.8-5.6)%, 5.4 (4.3-7.9)%, P = 0.001; 100%, 75%, P = 0.005]. Besides, the incidence of postoperative zinc deficiency in the OADS group was significantly higher than in the SG group (P = 0.019) and there was no significant difference in other postoperative nutritional outcomes between the two groups.

CONCLUSION

Although OADS and SG are both effective in the treatment of obese T2D, OADS performs better. Besides, the long-term efficacy of both needs to be recorded at subsequent follow-up.

Outcomes of totally robotic single-anastomosis duodenal-ileal bypass with sleeve gastrectomy: A large single-centre series

BACKGROUND

In recent years, the robot surgical system begins to be applied in single-anastomosis duodenal-ileal bypass with sleeve gastrectomy (SADI-S). However, only a few studies with very small sample size are present on robotic SADI-S.

OBJECTIVE

This retrospective study aimed to estimate the outcomes of totally robotic SADI-S.

METHODS

102 consecutive patients undergoing totally robotic SADI-S between March 2020 and December 2021 were included. Patient demographics, operative time, length of postoperative hospital stay, complications, conversion to laparotomy, reoperation, readmission, mortality, and postoperative weight loss were recorded to analyze the safety, effectiveness, and learning curve of totally robotic SADI-S. Based on the operative time, we evaluated the learning curve of robotic SADI-S by the cumulative sum (CUSUM) method.

RESULTS

The overall follow-up rate was 100%. The mean operative time was 186.13 ± 36.91 min. Short-term (≤30 days) complication was present in 6.9% (n = 7), of which major complications were identified in 2.9% (n = 3), including 2 gastric leakages and 1 postoperative acute respiratory failure. None of the patients experienced a long-term (＞30 days) complication. No conversion to laparotomy or deaths occurred during the study period. The mean percent of total weight loss (%TWL) at 3, 6, 12 and 24 months was 21.87 ± 4.44%, 32.49 ± 5.31%,40.86 ± 7.84%, and 44.64 ± 5.88%, respectively. The mean percent of excess weight loss (%EWL) at 3, 6, 12 and 24 months was 52.78 ± 16.99%,76.53 ± 17.99%,95.22 ± 18.59%, and 113.74 ± 23.30%, respectively. The cumulative sum (CUSUM) of operative time reached the first peak when the number of cases accumulated to the 16th case, then reached the second peak and continued to decline when the number of cases accumulated to the 27th case. Subsequently, all the patients were classified into the learning stage group (the first 27 patients) and the mastery stage group (the last 75 patients). Except for operative time, proportion of abdominal drainage tubes and lengths of postoperative hospital stay, there was no significant difference between the learning stage and mastery stage groups.

CONCLUSION

Totally robotic SADI-S seems to be feasible and effective in the treatment of morbid obesity, just like laparoscopic SADI-S. The learning curve of robotic SADI-S is 27 cases.

A prospective single-center study evaluating the efficacy of the stomach, intestinal, and pylorus-sparing procedure

BACKGROUND

The stomach, intestinal, and pylorus-sparing (SIPS) procedure is a single-anastomosis duodeno-intestinal bypass used in obesity management.

OBJECTIVE

Weight and metabolic outcomes in patients with severe obesity who underwent the SIPS procedure were evaluated in a community hospital-based study.

SETTING

Community hospital.

METHODS

This single-site prospective study of patients who underwent the SIPS procedure evaluated outcomes at 12 and 24 months. Mean changes in total weight loss and body mass index (BMI) and resolution of gastroesophageal reflux disease (GERD), obstructive sleep apnea (OSA), hypertension, type 2 diabetes (T2D), and hyperlipidemia were evaluated.

RESULTS

At baseline, 185 patients were enrolled; mean weight and BMI were 144.0 kg and 52.2 kg/m², respectively. Data for 88 (47.6%) and 29 (15.7%) patients who completed follow-up at 12 and 24 months, respectively, were available. At 12 months, mean total weight loss was 35.6% (weight reduction of 51.3 kg) and BMI reduction of 17.8 points were achieved and were maintained for the 29 patients who completed 24-month follow-up. No leaks or infections occurred. Complications occurred in 8 patients (.4%) and were not serious. Resolution of GERD, OSA, hypertension, T2D, and hyperlipidemia achieved in 87.1%, 59.2%, 32.7%, 93.1%, and 87.6% of patients, respectively, at 12 months was maintained at 24 months. Nutritional deficiency was absent.

CONCLUSIONS

Patients who underwent the SIPS procedure had meaningful reductions in weight and BMI, and many had resolution of metabolic co-morbidities; procedural complication rates were low. Our results support that the SIPS procedure is a safe and effective primary treatment for clinically severe obesity in a community-based hospital setting.

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.

Evaluation of the learning curve for robotic single-anastomosis duodenal–ileal bypass with sleeve gastrectomy

Background

The robotic surgical system is being used in various bariatric procedures. However, only a few studies with very small sample size are present on robotic single-anastomosis duodenal–ileal bypass with sleeve gastrectomy (SADI-S). Moreover, to date, the learning curve of robotic SADI-S has been poorly evaluated yet.

Objective

This retrospective study aimed to estimate the learning curve of robotic SADI-S.

Methods

102 consecutive patients who underwent robotic SADI-S between March 2020 and December 2021 were included. Textbook outcome standard was performed to comprehensively evaluate clinical outcome of robotic SADI-S. Based on the textbook outcome, we evaluated the learning curve of robotic SADI-S by the cumulative sum (CUSUM) method.

Results

The mean operative time was 186.13 ± 36.91 min. No conversion to laparotomy or deaths occurred during the study period. The rate of complications was 6.9% (n = 7), of which major complications were identified in 2.9% (n = 3), including 2 gastric leakages and 1 respiratory failure. A total of 60 patients reached the textbook outcome standard. The rate of textbook outcome was positive and was steadily increasing after the number of surgical cases accumulated to the 58th case. Taking the 58th case as the boundary, all the patients were divided into the learning stage group (the first 58 patients) and mastery stage group (the last 44 patients). The rate of complications, proportion of abdominal drainage tubes and postoperative hospital stay were significantly higher in the learning stage group compared with the mastery stage group (P < 0.05). No significant difference was observed between the two groups in terms of patient demographic data, operative times, reoperations and readmission.

Conclusion

Robotic SADI-S is a feasible and reproducible surgical technique with a learning curve of 58 cases.

Single Anastomosis Jejuno-ileal (SAJI): a New Model of Malabsorptive Revisional Procedure for Insufficient Weight Loss or Weight Regain After Roux-en-Y Gastric Bypass

BACKGROUND

In case of insufficient weight loss or weight regain or relapse of weight-related comorbidities after Roux-en-Y gastric bypass (RYGB), other procedures such as reduction of a large gastric pouch and stoma, lengthening of the Roux limb, conversion to sleeve gastrectomy and/or bilio-pancreatic diversion with duodenal switch have been advocated. Single anastomosis jejuno-ileal (SAJI) is a new revisional simple operation performed after RYGB failure which adds malabsorption to the previous gastric bypass.

METHODS

SAJI includes a single jejuno-ileal anastomosis specifically joining the ileum 250-300 cm proximal to the ileo-caecal valve and the jejunum 30 cm below the gastro-jejunal anastomosis on the Roux limb of the previous RYGB. Thirty-one patients underwent SAJI for insufficient weight loss and/or weight regain after RYGB. The percent total weight loss (%TWL) after RYGB and before SAJI was 21.8 ± 7.8. All SAJI operations were performed laparoscopically. The SAJI mean operating time was 145 min.

RESULTS

Regarding weight loss after SAJI, %TWL is 27.2 ± 7.4, 31.2 ± 6.4, 33.7 ± 5.9 and 32.9 ± 5.2 at 12, 24, 36 and 48 months, respectively. Our series recorded a low rate of peri-operative and medium-term complications with a low grade of severity (Clavien-Dindo classification grade). One patient required reoperation 36 days after SAJI for epigastrium incarcerated incisional hernia at the previous RYGB laparotomy site. Mortality was 0. Comorbidity reduction/resolution after SAJI is 83.2% for type 2 diabetes mellitus, 42.8% for arterial hypertension, 72.8% for dyslipidemia and 45.3% for OSA.

CONCLUSIONS

Treatment of failed RYGB is challenging. SAJI is a less complicated, purely low invasive malabsorptive operation that should reach satisfactory %TWL and comorbidity reduction/resolution.

Controversial Role of Robot in Primary and Revisional Bariatric Surgery Procedures: Review of the Literature and Personal Experience

Laparoscopy is the surgical standard of care for bariatric procedures; however, during the last two decades, the robotic approach has gained increasing interest. It is currently considered a safe and effective alternative to laparoscopy. This literature review investigates the role of the robotic approach for primary and revisional bariatric procedures, with the particular aim of comparing this technique with the standard-of-care laparoscopic approach. The feasibility of robotic dissection and suturing could have potential advantages: robotics may prevent the risk of leak and bleeding and other surgical complications, determining potential benefits in terms of operative time, length of hospital stay, and learning curve. Considering primary procedures, the literature reveals no advantages in robotic versus the laparoscopic approach for adjustable gastric banding and sleeve gastrectomy. Robotic Roux-en-Y gastric bypass is associated with a longer operative time and a shorter hospital length of stay than laparoscopy. The robotic approach in revisional surgery has been proven to be safe and effective. Despite the longer operative time, the robotic platform could achieve a lower bleeding rate compared with laparoscopy. The surgeon’s selection criteria related to referrals to the robotic approach of difficult-perceived cases could represent a bias. In conclusion, robotic surgery can be considered a safe and effective approach in both primary and revisional bariatric surgery, despite the lack of evidence to support its routine use in primary bariatric surgery. However, in revisional bariatric surgery and in surgical complex procedures, the robotic approach could have potential benefits in terms of surgical complications and learning curves.

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.

Gastric Ischaemia After SADI with Right Gastric Artery Ligation

There are several bariatric procedures used for the effective management of obesity that employ restrictive or malabsorptive components to achieve effective weight loss and reduction in metabolic disease. The single anastomosis duodeno-ileal (SADI) bypass was first introduced as a simplification of the biliopancreatic diversion with a duodenal switch [1], often accompanied by sleeve gastrectomy (SADI-S) or as an alternative gastric sleeve revision procedure to Roux-en-Y gastric bypass [2]. SADI was developed to address the technical complexity associated with other bypass reconstructions by involving only one anastomosis while preserving pyloric function, minimising dumping symptoms. This procedure has been proven to be safe and effective for sustained weight loss and resolution of metabolic disease, particularly in patients with a high carbohydrate diet [3, 4]. Currently, the SADI/SADI-S procedure is still considered a relatively novel technique with no absolute consensus over the exact surgical technique, and serious postoperative complications can still occur. A key discussion point is the utility of right gastric artery ligation depending on surgeon preference. This paper aims to describe the presentation and management of the first reported case of gastric ischaemia following sleeve to SADI revision with right gastric artery ligation.

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.

Consistent gut bacterial and short-chain fatty acid signatures in hypoabsorptive bariatric surgeries correlate with metabolic benefits in rats

OBJECTIVE

The study aimed at comparing how changes in the gut microbiota are associated to the beneficial effects of the most clinically efficient hypoabsorptive bariatric procedures, namely Roux-en-Y gastric bypass (RYGB), biliopancreatic diversion with duodenal switch (BPD-DS) and single anastomosis duodeno-ileal bypass with sleeve gastrectomy (SADI-S).

METHODS

Diet-induced obese (DIO) male Wistar rats were divided into seven groups. In addition to the groups subjected to RYGB, BPD-DS and SADI-S, the following four control groups were included: SHAM-operated rats fed a high-fat diet (SHAM HF), SHAM fed a low-fat diet (SHAM LF), SHAM HF-pair-weighed to BPD-DS (SHAM HF-PW) and sleeve-gastrectomy (SG) rats. Body weight, food intake, glucose tolerance, insulin sensitivity/resistance, and L-cell secretion were assessed. The gut microbiota (16 S ribosomal RNA gene sequencing) as well as the fecal and cæcal contents of short-chain fatty acids (SCFAs) were also analyzed prior to, and after the surgeries.

RESULTS

The present study demonstrates the beneficial effect of RYGB, BPD-DS and SADI-S on fat mass gain and glucose metabolism in DIO rats. These benefits were proportional to the effect of the surgeries on food digestibility (BPD-DS > SADI-S > RYGB). Notably, hypoabsorptive surgeries led to consonant microbial signatures characterized by decreased abundance of the Ruminococcaceae (Oscillospira and Ruminococcus), Oscillospiraceae (Oscillibacter) and Christensenellaceae, and increased abundance of the Clostridiaceae (Clostridium), Sutterellaceae (Sutterella) and Enterobacteriaceae. The gut bacteria following hypoabsorptive surgeries were associated with higher fecal levels of propionate, butyrate, isobutyrate and isovalerate. Increases in the fecal SCFAs were in turn positively and strongly correlated with the levels of peptide tyrosine-tyrosine (PYY) and with the beneficial effects of the surgery.

CONCLUSION

The present study emphasizes the consistency with which the three major hypoabsorptive bariatric procedures RYGB, BPD-DS and SADI-S create a gut microbial environment capable of producing a SCFA profile favorable to the secretion of PYY and to beneficial metabolic effects.

Long-Term Results of Single-Anastomosis Duodeno-ileal Bypass with Sleeve Gastrectomy (SADI-S)

BACKGROUND

Single-anastomosis duodeno-ileal bypass with sleeve gastrectomy (SADI-S) is a simplification of the duodenal switch (DS) in which the alimentary limb is eliminated, and the common channel is lengthened from 200 to 300 cm. Short-term results have demonstrated that SADI-S is safe and reproducible and that weight loss and comorbidities resolution are comparable to biliopancreatic diversion or DS.

OBJECTIVE

To analyze the long-term outcomes of SADI-S.

METHODS

From May 2007 to December 2015, 164 patients were consecutively submitted to a one-step SADI-S. The mean age was 47 years, and the mean body mass index (BMI) was 45.8 kg/m². A total of 101 patients had type 2 diabetes, 91 arterial hypertension, 81 obstructive apnea, and 118 dyslipidemia. Limb length was 200 cm in 50 cases, 250 cm in 99, and 300 cm in 15.

RESULTS

There was no mortality. One patient had a gastric leak, and 2 patients had an anastomotic leak. A total of 25% of the patients were lost to follow-up at 10 years. Excess weight loss and total weight loss were 87% and 38% at 5 years and 80% and 34% at 10 years. A total of 12 patients were submitted to revisional surgery for hypoproteinemia. Preoperatively 41 diabetics were under insulin treatment; at 5 years, 7 remained with insulin and 12 at 10 years. Mean glycemia was 104 mg/dL at 5 years and 118 mg/dL at 10 years. Mean HbA1c was 5.51% at 5 years and 5.86 at 10 years.

CONCLUSION

In the long term, SADI-S offers satisfactory weight loss and comorbidities resolution.

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.

Metabolomics analysis of stool in rats with type 2 diabetes mellitus after single-anastomosis duodenal-ileal bypass with sleeve gastrectomy

BACKGROUND

Single-anastomosis duodenal-ileal bypass with sleeve gastrectomy (SADI-S) is one of the most effective bariatric procedures in the treatment of type 2 diabetes mellitus (T2DM). However, the mechanisms by which SADI-S improves T2DM are not well-known.

OBJECTIVE

To explore the effects of SADI-S on metabolites in the stool of rats with T2DM.

METHODS

Twenty rats were fed on high-fat diet and administered with a low-dose (30mg/kg) of streptozotocin to establish T2DM models. The rats were then randomly assigned to the SADI-S group (n=10) and sham operation group (n=9). Stool samples were collected from all rats at 8 weeks after surgery and stored at -80 °C. Metabolomics analysis was performed to identify differential metabolites through ultra- performance liquid chromatography-mass spectrometry.

RESULTS

At 8-week after surgery, rats of the SADI-S group showed significantly decreased fasting blood glucose, glucose tolerance test 2-hour, glycated haemoglobin, and body weight compared with those of the sham group. A total of 245 differential metabolites were identified between the two groups. Among them, 16 metabolites such as branched-chain amino acids (valine), aromatic amino acid (phenylalanine), bile acid (cholic acid, lithocholic acid, and β-muricholic acid), short-chain fatty acid (isobutyric acid), and phospholipid [lysoPE(17:0), lysoPE(20:3) and lysoPS(16:0)] were associated to the T2DM remission after SADI-S.

CONCLUSION

SADI-S improves T2DM in rats by regulating phenylalanine biosynthesis, valine, phenylalanine, alanine, glutamate, proline, bile acid, and phospholipid metabolism pathways.

Retrospective Comparison of SADI-S Versus RYGB in Chinese with Diabetes and BMI< 35kg/m2: a Propensity Score Adjustment Analysis

BACKGROUND

As a modification of the duodenal switch (DS), single-anastomosis duodenal-ileal bypass with sleeve gastrectomy (SADI-S) has recently become very popular and is successful for weight loss and T2DM remission. However, current studies have been mostly aimed at patients with severe obesity.

OBJECTIVES

In this study, we firstly compare primary SADI-S to the Roux-en-Y gastric bypass (RYGB) in Chinese with diabetes and BMI< 35 kg/m².

METHODS

Using a propensity score (PS) matching analysis, we analyzed all patients with diabetes and BMI< 35 kg/m² who underwent primary SADI-S or RYGB. All surgeries were conducted by a single surgeon at a Chinese center from June 2017 to January 2019.

RESULTS

Twenty-six patients who underwent SADI-S and 65 patients who underwent RYGB were included in our analysis. Of these, 26 (100%) of patients in the SADI-S group and 43 (66%) of patients in the RYGB group completed the 24-month follow-up. No severe perioperative complication was observed in either group. There was a statistically higher percentage of total weight loss with SADI-S at the 2-year follow-up when compared to RYGB (p = 0.017 after PS correction). After PS adjustment, 76.5% of patients in the SADI-S group and 82.4% of patients in the RYGB group achieved complete remission of T2DM (p = 1.000). Nutritional outcomes were similar in the two groups.

CONCLUSION

In Chinese with diabetes and BMI< 35 kg/m², with comparable T2DM remission and nutritional outcomes, primary SADI-S allows for better weight loss than RYGB. Compared with RYGB, SADI-S is also a safe, effective, and feasible treatment for these patients.

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.

Long-Term (> 6 Years) Outcomes of Duodenal Switch (DS) Versus Single-Anastomosis Duodeno-Ileostomy with Sleeve Gastrectomy (SADI-S): a Matched Cohort Study

BACKGROUND

There are no comparative studies on the long-term outcomes after the primary traditional duodenal switch (DS) and single-anastomosis duodeno-ileostomy with sleeve gastrectomy (SADI-S).

PURPOSE

This study aims to compare the long-term outcomes in a matched cohort.

SETTING

This study took place in a single private institute, in the USA.

MATERIALS AND METHODS

Data from 266 patients who underwent a primary laparoscopic traditional DS or primary laparoscopic SADI-S from September 2011 to December 2015 by four surgeons were used for a retrospective matched cohort. Data were obtained by matching every DS patient to a SADI-S patient of the same age, sex, and body mass index (BMI). In addition, only patients that were out at least 5 years and had a minimum 5-year follow-up were included in the study.

RESULTS

The matched cohort included 30 DS and 30 SADI-S patients. There were no statistically significant differences in the preoperative characteristics and baseline comorbidities between both groups. The SADI-S patients had significantly shorter operative time and length of stay. The overall long-term complications, especially the long-term Clavien-Dindo grade IIIb complications, were significantly fewer with SADI-S. At 6 years, the DS patients had statistically higher %EWL; however, the ending BMIs were statistically similar between both groups. There were no significant differences in the long-term comorbidity and nutritional outcomes of both groups. The long-term failure rates were comparable.

CONCLUSIONS

Most long-term outcomes of SADI-S were either similar or significantly better than DS. Part of the reasons could be the surgeon's learning curve and the small sample sizes of both groups.

Robotic Revisional Single Anastomosis Duodenoileal Bypass After Sleeve Gastrectomy

Introduction: Single anastomosis duodenoileal bypass with sleeve gastrectomy (SADI-S) is a metabolic operation emerging as an option for patients with morbid obesity. It is a promising revisional procedure for weight regain or suboptimal weight loss after sleeve gastrectomy (SG). Currently, there is limited literature describing robotic revisional SADI-S. This study describes the safety, feasibility, and early outcomes of robotic revisional SADI-S after previous SG. Methods: This is a retrospective review from May 26 2019 to January 31 2021. Perioperative outcomes were analyzed. Results: A total of 16 patients underwent the procedure. There were 11 females (69%) with a mean age of 39 ± 11 years. Mean body mass index (BMI) was 44.0 ± 5.1 kg/m² and median ASA was two. Comorbidities included hypertension (25%), hyperlipidemia (19%), and obstructive sleep apnea (13%). Mean interval from primary to revisional surgery among patients was 5.5 ± 1.4 years. Median operative console time was 110 minutes (IQR = 103-137). There were no intraoperative complications. The median hospital stay was 2 days (IQR = 2-3). Perioperative outcomes included no reoperations, perioperative complications, or deaths. There were two (12.5%) emergency department visits for wound checks without infection but no readmissions. At a median follow-up of 4.5 months (IQR = 1-10), patients had a mean BMI of 38.3 ± 7.3 kg/m² and a mean percent total body weight loss (%TBW) of 12.7%. Conclusions: Initial outcomes suggest that robotic revisional SADI-S after previous SG is feasible and safe. Future studies are needed to evaluate intermediate- and long-term postoperative outcomes.

The Panoramic View of Revisional Bariatric Surgery

Introduction: Obesity remains a major public chronic disease, and the multifactorial components of its relapse in many patients remain inevitable. Methods: This article provides a panoramic view of the most commonly performed revisional bariatric surgery (RBS). RBS is a complex procedure; thus, primary procedures should be well chosen and performed to avoid the increasing number of RBS cases. Results: Bariatric surgery is the only successful long-term treatment for obesity. However, a proportion of primary bariatric surgeries has failed during the follow-up period. In recent decades, the solution for these complications is by performing RBS. It is mandatory to understand obesity as a chronic disease to appropriately treat patients. Treatment strategies are needed to determine the indications for revision. RBS requires a meticulous evaluation to facilitate good long-term results. Conclusions: Treatment strategies will be a fundamental pillar to wisely determine the indications for revision and identify the factors influencing failure by prudently and rationally evaluating the revisional procedure that the patient will benefit from and acquiring a high level of surgical skills.