Impact of Extent of Antral Resection on Surgical Outcomes of Sleeve Gastrectomy for Morbid Obesity (A Prospective Randomized Study)

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.

Posterior fixation of gastric tube with fibrin sealant in laparoscopic sleeve gastrectomy: a promising method to prevent revision surgeries

BACKGROUND

We aim to assess the effects of gastric posterior fixation with fibrin sealant in laparoscopic sleeve gastrectomy in aspects of 12th-month body mass index and gastric volume.

METHODS

The patients who underwent laparoscopic sleeve gastrectomy between January 2019 and February 2021 were divided into two groups preoperatively. The first 75 patients were appointed to the posterior fixation group, and the second 75 were to the control group. Changes in gastric volume and body mass index were assessed in the postoperative 12th month.

RESULTS

There were 110 patients in the final analysis. Fifty-four patients had posterior fixation, and 56 had only laparoscopic sleeve gastrectomy. The posterior fixation group was superior in terms of total weight loss rate (39.1% vs. 34.5%, p<0.001) and less gastric volume increase rate (39.8% vs. 164.7%, p<0.001) in the postoperative 12th month.

CONCLUSION

Our study suggests that posterior fixation with fibrin sealant in laparoscopic sleeve gastrectomy is a promising method for preventing weight regain and creating a need for revision surgery.

The impact of the bougie size and the extent of antral resection on weight-loss and postoperative complications following sleeve gastrectomy: results from the Scandinavian Obesity Surgery Registry

BACKGROUND

The optimal sleeve diameter and distance from the pylorus to the edge of the resection line in laparoscopic sleeve gastrectomy (LSG) remain controversial.

OBJECTIVES

To evaluate the influence of bougie size and antral resection distance from the pylorus on postoperative complications and weight-loss results in LSG.

SETTING

Nationwide registry-based study.

METHODS

This study included all LSGs performed in Sweden between 2012 and 2019. Data were obtained from the Scandinavian Obesity Surgery Registry. Reference bougie size of 35-36 Fr and an antral resection distance of 5 cm from the pylorus were compared to narrower bougie size (30-32 Fr), shorter distances (1-4 cm), and extended distances (6-8 cm) from the pylorus in assessing postoperative complications and weight loss as the outcomes of LSG.

RESULTS

The study included 9,360 patients with postoperative follow-up rates of 96%, 79%, and 50% at 30 days, 1 year, and 2 years, respectively. Narrow bougie and short antral resection distance from the pylorus were significantly associated with increased postoperative weight loss. Bougie size was not associated with increased early or late complications. However, short antral resection distance was associated with high risk of overall early complications [odds ratio: 1.46 (1.17-1.82, P = .001)], although no impact on late complications at 1 and 2 years was observed.

CONCLUSIONS

Using a narrow bougie and initiating resection closer to the pylorus were associated with greater maximum weight loss. Although a closer resection to the pylorus was associated with an increased risk of early postoperative complications, no association was observed with the use of narrow bougie for LSG.

Impact of Helicobacter pylori Status on Postoperative Morbidities After Laparoscopic Sleeve Gastrectomy in an Endemic Region (a Retrospective Multicentric Study)

PURPOSE

Studies are still ongoing to determine whether Helicobacter pylori (HP) may affect the results of laparoscopic sleeve gastrectomy (LSG). The main research objectives were HP prevalence in patients with severe obesity and the effects of HP status on outcomes.

PATIENTS AND METHODS

This multicenter retrospective study included patients with severe obesity who had LSG. The patients were grouped into three groups based on the HP status of preoperative endoscopic biopsies and postoperative specimen results: group I (negative HP), group II (eradicated HP), and group III (positive HP). The primary outcome was the overall postoperative morbidities.

RESULTS

One thousand six hundred fifteen patients who underwent LSG for severe obesity were included in this study. Seven hundred fifty (46.4%) patients had negative HP, and 637 (39.4%) patients had eradicated HP, whereas 228 (14.1%) patients had positive HP. The antral and gastric body wall thickness was significantly noticed with positive HP. The groups had no significant differences regarding postoperative complication frequency, severity, and hospital mortality. The rates of gastric leakage in the three groups do not differ significantly. BMI > 50, gastropexy, gastric thickness, and antral resection were found to be independent risk factors for the occurrence of postoperative complications after LSG. There was no statistical significance as regards postoperative %TWL and %EWL among the three groups.

CONCLUSION

The early results of LSG do not appear to be impacted by HP's status. The early postoperative course is unaffected by HP eradication anymore. Therefore, routine preoperative HP testing may not be as necessary, and management can be finished after LSG.

Antral Preservation in Sleeve Gastrectomy Appears to Protect Against Prolonged Vomiting and Gastroesophageal Reflux Disease. A Meta-Analysis of Randomized Controlled Trials

The optimal distance between the starting point of gastric transection and the pylorus during laparoscopic sleeve gastrectomy (LSG), which can be referred to as the distance from pylorus (DFP), is controversial. No consensus exist for what DFP is considered antral preservation, and what DFP is considered antral resection. Some surgeons prefer shorter DFP to maximize excess weight loss percentage (EWL%), while others prefer longer DFP because they believe that it shortens length of stay (LOS) and protects against leaks, prolonged vomiting, and gastroesophageal reflux disease (GERD). We sought to compare 6-cm DFP and 2-cm DFP in postoperative outcomes. In addition, we sought to evaluate the magnitude of any observed benefit through number needed to treat (NNT) analysis.

Prevalence, Risk Factors, and Management of Postoperative Nausea and Vomiting After Laparoscopic Sleeve Gastrectomy (a Retrospective Multicentric Study)

PURPOSE

Postoperative nausea and vomiting (PONV) is a frequent unappealing laparoscopic sleeve gastrectomy (LSG) sequel. The study's purpose was to determine the prevalence, risk factors of PONV, and management of PONV after LSG.

PATIENTS AND METHODS

This multicenter retrospective study included patients with morbid obesity who had LSG between January 2022 and April 2023. The age range for LSG was 16 to 65 years, and the eligibility requirements included morbid obesity according to international guidelines.

RESULTS

PONV was experienced by 74.6% of patients who underwent LSG at 6 h postoperative. Multivariate analysis revealed that female gender, smokers, preoperative GERD, gastropexy, and severity of pain were found to be independent risk variables of the development of PONV, while antral preservation, opioid-free analgesia, and intraoperative combined analgesia were found to be independent protective variables against the development of PONV. Combined intravenous ondansetron and metoclopramide improved 92.6% of patients who developed PONV. Dexamethasone and antihistamines drugs are given for 42 cases with persistent PONV after using intravenous ondansetron and metoclopramide. Pain management postoperatively by opioid-free analgesia managed PONV. Helicobacter pylori status has no role in the development of PONV after LSG.

CONCLUSION

Female gender, smoking, presence of preoperative GERD, gastropexy, and severity of pain were found to be independent risk variables of the development of PONV, while antral preservation, opioid-free analgesia, and intraoperative combined analgesia were observed to be independent protective factors against the occurrence of PONV. Combined intravenous ondansetron and metoclopramide improved PONV. Dexamethasone and antihistamines drugs are given for persistent PONV.

Effect of post-gastric sleeve pyloric length on control of type II diabetes mellitus

Background

Although the effectiveness and safety of laparoscopic sleeve gastrectomy (LSG) have been demonstrated, there is still debate about the best surgical method, with the resection distance from pylorus (DP) being among the most contentious topics. In patients who had LSG for morbid obesity, the effect of the resection distance from the pylorus on the management of type II diabetes mellitus during the postoperative phase was examined.

Patients and methods

After receiving each patient’s agreement, a total of 46 obese individuals were enrolled. Patients were prospectively randomized into two groups, group A (‘AP group’) and group B (‘AR group’), based on the distance between the initial reload firing and the pylorus (4 cm for group A and 2 cm for group B, respectively). Blood sugar levels were measured three, six months, and one year following LSG. After a year of follow-up, the percentage of excess weight loss (%EWL) was calculated.

Results

Postoperative weight was statistically significant lower and EWL% was statistically significant higher in group B: LSG ‘2 cm’ compared to group A: LSG ‘4 cm’. As regard outcomes of type 2 diabetes mellitus after LSG, in spite of nonsignificant statistical value, we reported that there was higher frequency of complete remission after 3, 6 and 12 months in group B: LSG ‘2 cm’ compared to group A: LSG ‘4 cm’ and cases with complete remission were associated with significant higher EWL%.

Conclusion

Patients undergoing laparoscopic sleeve gastrectomy are recommended to have shorter resection distance from pylorus (DP) done. It has been linked to superior surgical results, weight reduction, and diabetes mellitus management with no problems recorded.

When Definitions Differ, are Comparisons Meaningful? Definitions of Weight Regain After Bariatric Surgery and Their Associations with Patient Characteristics and Clinical Outcomes - A Need for a Revisit?

INTRODUCTION

Definitions and prevalence of weight regain (WR) after bariatric surgery remains inconsistent and their clinical significance unclear.

OBJECTIVES

To assess WR five years after sleeve gastrectomy (LSG), employing six definitions; and appraise their association with patient characteristics/clinical outcomes.

METHODS

Consecutive patients (N = 589) who underwent LSG were followed up for 5 years. WR prevalence was calculated yearly employing six definitions. Regression analysis assessed associations between WR at 5 years, and patient characteristics (age, sex, preop BMI, number of follow-up visits, number of comorbidities) and remission of comorbidities (type 2 diabetes, hypertension, and dyslipidemia).

RESULTS

Sample's mean age and BMI were 34 ± 11.6 years and 43.13 ± 5.77 kg/m², and 64% were females. Percentage of patients with WR at 2, 3, 4, and 5 years fluctuated between 2.53% and 94.18%, subject to definition, and time point. The definition "Any WR" generated the highest prevalence of WR (86-94%) across all time points. At 5 years, for patient characteristics, preoperative BMI was associated with three definitions (P 0.49 to < 0.001), sex was associated with two (P < 0.026-0.032), and number of comorbidities was associated with one definition (P = 0.01). In terms of comorbidities, only hypertension was associated with WR (one definition, P = 0.025). No other definitions of WR were associated with any of the variables under examination.

CONCLUSION

Weight regain is reasonably expected after BMS. WR definitions were of minor clinical significance due to weak associations with limited comorbidities. Dichotomous definitions might offer some guidance while managing individual patients. However, its utility as a comparator metric across patients/procedures requires refinements.

The effect of antral resection start point on post sleeve gastrectomy gastroesophageal reflux symptoms and weight loss outcomes

PURPOSE

Sleeve gastrectomy (SG) has gained worldwide popularity by surgeons due to acceptable results in weight loss and obesity-associated medical problems. Distance from the pylorus during antral resection in SG may be effective in decreasing the occurrence of gastroesophageal reflux disease (GERD). The aim of this study was to evaluate GERD symptoms and weight loss outcomes in two groups of SG patients with different start points of antral resection.

METHODS

This is a prospective cohort study on 220 patients who underwent SG between June 2019 and July 2021, aged 18 and above, BMI ≥ 40 kg/m², or BMI > 35 kg/m² with at least one obesity-associated medical problem. According to the start point of antral resection the patients were divided in two groups (group A: from 2 cm of pylorus and group B: from 4 cm of pylorus). Evaluation of GERD was performed using GerdQ questionnaire at 12-month follow up.

RESULTS

Mean age and BMI of all patients were 37.6 ± 10 year and 44.8 ± 5.7 kg/m² at the time of SG. Totally 153(69.5%) of the patients were female. De novo GERD after 12 months in the groups A and B was found in 18 (20%) and 19 (21%) patients. TWL% at 12-month follow ups, were 33.9% and 32.5% in group A and B, respectively.

CONCLUSION

Antral resection's start point has no statistically significant effect on the excess and total weight loss indices, resolution of the obesity-related medical problems and De novo GERD between 2 and 4 cm start point for antral resection during SG.

Prevalence, Predictors, and Management of Gastroesophageal Reflux Disease After Laparoscopic Sleeve Gastrectomy: a Multicenter Cohort Study

BACKGROUND

One of the most popular bariatric procedures is laparoscopic sleeve gastrectomy (LSG), which can either cause or worsen gastroesophageal reflux disease (GERD). Therefore, the goal of this study was to examine the prevalence, predictors, and management of GERD symptoms after LSG.

MATERIALS AND METHODS

From January 2017 to January 2022, we looked at patients who had a primary LSG and developed GERD. Before LSG, all patients underwent a barium meal and upper endoscopy. After LSG, barium meal, endoscopy, esophageal manometry, and 24-h pH measurements were performed for selected patients. The diagnosis of GERD is based on the GERD-HRQL questionnaire and upper endoscopy.

RESULTS

The study included 1537 patients (62.5% women and 37.5% men) with a mean age of 34.4 years. The mean % TWL was 40.7% during a mean follow-up period of 15.9 months. A total of 379 patients (24.7%) experienced postoperative GERD, of whom 328 (21.3%) had postoperative de novo GERD symptoms, 25 (1.6%) had worsened preoperative GERD, and 26 (1.7%) had the same preoperative GERD symptoms. Antral preservation and gastropexy were protective factors against the development of GERD after LSG. LSG was converted to LRYGB in 15.8% of the patients with GERD. The response to medical treatment was observed in 300 (79.2%) patients with GERD.

CONCLUSION

Post-LSG GERD presented in 379 patients (24.7%). Antral preservation and gastropexy were protective factors for the development of postoperative GERD after LSG. Medical treatment was the main line of treatment for GERD.

TRIAL REGISTRATION

ClinicalTrials.gov ID: NCT05416645.

Antrum Preservation Versus Antrum Resection in Laparoscopic Sleeve Gastrectomy With Effects on Gastric Emptying, Body Mass Index, and Type II Diabetes Remission in Diabetic Patients With Body Mass Index 30-40 kg/m2: a Randomized Controlled Study

Background

Laparoscopic sleeve gastrectomy (LSG) is a widely performed procedure nowadays. There is a controversy on whether antrum resection (AR) or antrum preservation (AP) should be done and if this has an effect on BMI, gastric emptying, and associated medical conditions such as diabetes mellitus (DM).

Study Design

This randomized controlled trial included 56 patients in the AP group and 53 patients in the AR group with BMI 30–40 kg/m². Weight, BMI, fasting and postprandial blood glucose (FBS and PPBS), HbA1C, oral hypoglycemic drug use, and % gastric emptying by gastric scintigraphy at 30, 60, 90, and 120 min were recorded preoperatively and postoperatively at 3, 6, and 12 months. Postoperative % of total weight loss (TWL) and symptoms of de novo GERD were observed at 3, 6, and 12 months.

Results

The AR group had significantly lower BMI and HbA1C and higher %TWL than the AP group. There was a significant difference between the two groups regarding % of gastric emptying with the AP group showing higher values at 30, 60, 90, and 120 min. There were no significant differences regarding FBS, PPBS, and oral hypoglycemic use. The AR group had more incidence of GERD symptoms postoperatively yet with no significant difference.

Conclusion

LSG with antrum resection (2 cm from the pylorus) had significantly less postoperative BMI, higher %TWL, better control of type II DM, and more retention of gastric contents in patients with BMI 30–40 kg/m² in comparison with LSG with antral preservation with non-significant increase in incidence of GERD symptoms.

Graphical abstract

Is there a role for upper gastrointestinal contrast study to predict the outcomes of sleeve gastrectomy? Lessons learnt from a prospective study

Context:

The importance of upper gastrointestinal (UGI) contrast study following sleeve gastrectomy (SG) is equivocal. It can, however, yield anatomical and functional details, the significance of which mostly remains unknown.

Settings and Design:

This prospective, single-center study included SG patients between January 2018 and January 2019.

Materials and Methods:

UGI contrast study was done on post-operative day 1. The findings of the study namely gastroesophageal junction (GEJ) holdup time, presence of fundus, gastroduodenal emptying (GDE) time, and sleeve shape were compared with weight loss, improvement of glycosylated hemoglobin (HbA1c) and gastroesophageal reflux disease (GERD) symptoms at 3, 6, and 12 months follow-up.

Results:

There were 138 patients with 100% follow-up. Radiological sleeve patterns observed were: tubular (62.3%), superior (16.0%), and inferior (21.7%) pouches. GEJ holdup time had no effect on percentage total weight loss (%TWL) (P = 0.09) or HbA1c improvement (P = 0.077). The absence of fundus led to greater %TWL at 6 months (P = 0.048). GDE time <15 s led to higher %TWL (P = 0.028) and lower HbA1c (P = 0.010) at 12 months. Antrum size <2 cm was associated with higher %TWL (P = 0.022) and lower HbA1c level (P = 0.047) at 12 months. Vomiting and regurgitation were common with tubular sleeves.

Conclusion:

UGI contrast study can predict weight loss, HbA1c improvement, and GERD symptoms. The absence of fundus, small antrum, and rapid GDE are associated with better weight loss. HbA1c improvement is better with small antrum and rapid GDE. Tubular sleeve predisposes to vomiting and regurgitation.

The Effects of Antral Preservation and Antral Resection on Body Composition, Glycemic Control and Bone Mineral Density Following Vertical Sleeve Gastrectomy in C57BL/6J Mice with Obesity and Type 2 Diabetes

PURPOSE

Sleeve gastrectomy (SG) is the most currently popular operation for obesity and related metabolic disorders. The aim of this study was to compare the effect of antrum preservation SG (AP-SG) and antrum resection SG (AR-SG) on the body composition, glycemic control and bone mineral density (BMD) in mice.

METHODS

Sham, AP-SG and AR-SG operation were performed on obese and T2D C57BL/6J mice (8 in each group). Body weight, food intake, and fasting glucose (FG) levels were measured at the 0, 2, 4, 6 and 8 weeks post-operatively. Oral glucose tolerance test (OGTT) was performed preoperatively and at the eighth postoperative week. The body fat content and total body BMD were evaluated by dual-energy x-ray absorptiometry. After being euthanized, the femurs were harvested and analyzed by micro-CT.

RESULTS

The improvements in body weight, food intake, FG, glycemic control and body fat were statistically significant following AP-SG and AR-SG. Both AP-SG and AR-SG groups decreased total body BMD and regional BMD in the distal femur compared to the sham group. No significant difference of FG was observed in AP-SG and AR-SG group postoperatively, but AR-SG showed significantly superior OGTT glucose AUC than AP-SG. Except for a lower BMD, AR-SG achieved superior outcomes in body fat and glycemic control than AP-SG.

CONCLUSION

Antrum resection SG shows a lower percentage of body fat and better glycemic control than antrum preservation SG. However, antrum resection SG has a higher risk of having a lower bone mass. Further human clinical trials are needed to confirm this finding.

Effect of Altitude Level on Surgical Outcomes of Laparoscopic Sleeve Gastrectomy for Patients With Morbid Obesity: A Multicentre Prospective Study

BACKGROUND

This study aimed to evaluate the impact of altitude level on surgical outcomes of laparoscopic sleeve gastrectomy (LSG) for patients with morbid obesity.

METHODS

At the normal altitude level, 808 patients underwent LSG, and 467 patients underwent LSG in high-altitude regions. The primary outcome was evaluated based on the postoperative morbidity rate. Secondary outcomes were evaluated based on operating time, mortality, hospital stay, percentage of total weight loss (TWL), and comorbidities improvement.

RESULTS

No significant differences were noted in-hospital stay, time to start oral intake, gastric leakage, overall complications, and hospital mortality between the 2 groups. Deep vein thrombosis, pulmonary embolism, and mesenteric vascular occlusion were significantly higher in high altitude [11 (1.3%) vs. 14 (3%), P=0.04; 8 (0.7%) vs. 11 (2.4%), P=0.01; 4 (0.5%) vs. 8 (1.7%), P=0.03, respectively]. Patients with normal altitude recorded a better %TWL than those at high altitude after 12 months (41±9 vs. 39±9.6, P=0.002) and after 24 months (41±8 vs. 40±9, P=0.009). In both groups, a significant improvement was noted in comorbidity after LSG.

CONCLUSION

The %TWL significantly achieved with LSG in normal and high altitudes. After 12 and 24 months, the %TWL is significantly higher with LSG at normal altitudes. High altitude is associated with a high incidence of deep vein thrombosis, pulmonary embolism, and superior mesenteric vascular occlusion with LSG.

Outcomes of laparoscopic sleeve gastrectomy with and without antrectomy in severely obese subjects. Evidence from randomized controlled trials

BACKGROUND

Laparoscopic sleeve gastrectomy (SG) has been proven safe and effective in achieving weight loss. However, the distance from the pylorus where resection should begin has been debated.

OBJECTIVES

To compare the clinical outcomes of laparoscopic SG with antrum resection (AR) versus preservation (AP) for bariatric purposes by conducting a meta-analysis of randomized controlled trials (RCT).

SETTING

Academic hospital, United States.

METHODS

PubMed and Cochrane Library were queried for RCTs from establishment to August 2020. The following key search terms were used: "sleeve gastrectomy" AND ("antrectomy" OR "antrum") AND ("randomized" OR "random"). The following data were extracted: author, publication year, country, sample size, follow-up duration, and clinical outcomes, including weight-related: excess weight loss (EWL), total weight loss (TWL), body mass index (BMI), operation time, length of hospital stay, complication rates, and resolution of obesity-related comorbidities.

RESULTS

A total of 9 unique RCTs including 492 AR and 385 AP patients were screened and included in the final quantitative analysis. Patients who underwent SG with AR showed higher EWL and TWL at 6 months (EWL: P < .001; TWL: P = .006), and 1 year (EWL: P = .013; P < .001) postoperatively. The BMI was also lower in the AR group 3 months (P = .013) and 6 months (P = .003) postoperatively. However, the EWL and BMI at 2 years were comparable between both groups (P = .222 and P = .908, respectively). No statistical significance was observed in terms of operating time, staple line disruption, bleeding, complications with a Clavien-Dindo Grade >III, resolution of comorbidities (hypertension, diabetes, hyperlipidemia, arthritis/back pain), and de novo gastroesophageal reflux disease (P > .05). AP was associated with a slightly shorter postoperative hospital stay (4.0 versus 3.1 days, P = .039).

CONCLUSION

Laparoscopic SG with AR is associated with superior weight loss in the short-term compared with AP. However, mid-term follow-up beyond 1 year showed no significant differences in BMI or incidence of de novo gastroesophageal reflux disease.

The Effect of Antrum Size on Weight Loss, Glucagon-Like Peptide-1 (GLP-1) Levels, and Glycemic Control Following Laparoscopic Sleeve Gastrectomy in Adolescents with Obesity and Type 2 Diabetes

PURPOSE

The aim of this study was to compare the effect of antral resection versus antral preservation sleeve gastrectomy on the post-operative GLP-1, glycemic control, and weight loss in adolescents suffering from severe obesity and type 2 diabetes (T2D).

MATERIALS AND METHODS

This study included 36 adolescents. Patients were randomly divided into 2 groups: group (A) and group (B). Each group included 18 patients who underwent LSG, starting transection at 2 cm or 5 cm from the pyloric ring in group (A) and group (B), respectively. They were followed up at 1, 3, 6, 12, and 24 months post-operatively. The outcomes were the post-operative GLP-1 response, glycemic control, weight loss, and safety.

RESULTS

The improvements in the body mass index and the percentage of excess weight loss (%EWL) were statistically significant within each group. The mean GLP-1 levels showed significant increase at the 1, 3, and 6 months but not in the 12 and 24 months in all the studied samples within each group. The mean HbA1c levels and post-prandial serum C-peptide significantly improved within each group (P < 0.05). No statistical differences in the weight loss, %EWL, GLP-1, HbA1c, C-peptide changes, and complication rates were observed between both groups. Diabetic remission was significantly higher (88.9%) in group (A).

CONCLUSIONS

LSG resulted in generalized significant GLP-1 initial response that decreased over time. The reduced antrum size did not influence the GLP-1 response, glycemic control, or insulin resistance, but resulted in significantly better T2D remission. Since the study examines a small number of patients, further studies are needed.

TRIAL REGISTRATION

ClinicalTrials.gov Identifier: NCT04388059.

Long-term Effects of Laparoscopic Sleeve Gastrectomy: What Are the Results Beyond 10 Years?

PURPOSE

Laparoscopic sleeve gastrectomy (LSG) has become the most commonly performed bariatric procedure worldwide. Newer studies providing long-term follow-up show a high incidence of weight regain and a high incidence of reflux. The study's objective was to present 5 to 15-year follow-up results regarding weight loss, comorbidities, reoperation rate, and a potential learning curve.

METHODS

This is a retrospective analysis of prospectively collected data. Patients who underwent LSG between August 2004 and December 2014 were included.

RESULTS

A total of 307 patients underwent LSG either as a primary bariatric procedure (n = 262) or as a redo operation after failed laparoscopic gastric banding (n = 45). Mean body mass index at the time of primary LSG was 46.4 ± 8.0 kg/m², and mean age at operation was 43.7 ± 12.4 years with 68% females. Follow-up was 84% and 70% at 5 and 10 years, respectively. The mean percentage excess body mass index loss (%EBMIL) for primary LSG was 62.8 ± 23.1% after 5 years, 53.6 ± 24.6% after 10 years, and 51.2 ± 20.3% after 13 years. Comorbidities improved considerably (e.g., type 2 diabetes mellitus 61%), while the incidence of new-onset reflux was 32.4%. Reoperation after LSG was necessary in almost every fifth LSG-patient: 24 patients (7.8%) were reoperated due to insufficient weight loss, 12 patients (3.9%) due to reflux, 23 due to both (7.5%).

CONCLUSIONS

LSG provides a long-term %EBMIL from 51 to 54% beyond 10 years and a significant improvement of comorbidities. On the other hand, a high incidence of insufficient weight loss and de novo reflux was observed, leading to reoperation and conversion to a different anatomy in 19.2%.

Early Weight Loss after Laparoscopic Sleeve Gastrectomy Predicts Sustained Weight Maintenance Among Chinese Individuals with a BMI < 35 kg/m2

OBJECTIVES

This study assessed the efficacy and safety of laparoscopic sleeve gastrectomy (LSG) in Chinese individuals with a body mass index (BMI) under 35 kg/m² and to explore the association between early weight loss and sustained weight maintenance.

METHODS

Patients whose BMI < 35 kg/m² were recruited. Changes in BMI, total weight loss (%TWL), and excess weight loss (%EWL) were evaluated, with successful weight loss being a %EWL of > 50% and a %TWL of > 25%. Binary logistic regression was employed to assess relationships between %EWL and %TWL and to calculate a joint predictor. The association between early weight loss and sustained weight maintenance was assessed as a function of %EWL, %TWL, and this joint predictor, with receiver operating characteristic (ROC) curves being used for optimal cutoff threshold identification.

RESULTS

In total, 143 individuals with average preoperative weight and BMI values of 88 (82, 95) kg and 31.99 (29.41, 33.15) kg/m², respectively, were enrolled in present study. At 5 years, 48.00% of patients achieved successful weight loss. Both 3-month %EWL and %TWL were significantly related to sustained weight loss at 5 years (P < 0.05). ROC curves were used to identify %TWL of 19.54% at 3 months as the most reliable predictor of weight loss at a 5-year follow-up (sensitivity: 61.11%, specificity: 76.92%).

CONCLUSION

LSG had long-term safety and efficacy, and %TWL at 3 months can predict sustained 5-year weight loss in Chinese individuals with BMI < 35 kg/m².

Revisional Surgeries of Laparoscopic Sleeve Gastrectomy

Bariatric surgery has become increasingly common due to the worldwide obesity epidemic. A shift from open to laparoscopic surgery, specifically, laparoscopic sleeve gastrectomy (LSG), has occurred in the last two decades because of the low morbidity and mortality rates of LSG. Although LSG is a promising treatment option for patients with morbid obesity due to restrictive and endocrine mechanisms, it requires modifications for a subset of patients because of weight regain and tough complications, such as gastroesophageal reflux, strictures, gastric leak, and persistent metabolic syndrome., Revision surgeries have become more and more indispensable in bariatric surgery, accounting for 7.4% in 2016. Mainstream revisional bariatric surgeries after LSG include Roux-en-Y gastric bypass, repeated sleeve gastrectomy, biliopancreatic diversion, duodenal switch, duodenal-jejunal bypass, one-anastomosis gastric bypass, single anastomosis duodeno-ileal bypass (SAID) and transit bipartition. This review mainly describes the revisional surgeries of LSG, including the indication, choice of surgical method, and subsequent effect.

The role of the surgical resection distance from the pylorus after laparoscopic sleeve gastrectomy: a prospective cohort study from an academic medical center in Egypt

BACKGROUND

Laparoscopic sleeve gastrectomy was recently described as an effective approach for the operative treatment of obesity, but the ideal procedure remains controversial. One of the most debated issues is the resection distance from the pylorus. We conducted this study to elucidate any potential differences in the short-term outcomes between 2 and 6 cm distance from the pylorus in laparoscopic sleeve gastrectomy.

METHODS

A prospective observational cohort study in a selected cohort of 96 patients was conducted from January 2018 to March 2019 in morbidly obese patients who had laparoscopic sleeve gastrectomy performed at Suez Canal University Hospital. Outcome was expressed by excess weight loss percentage, resolution of comorbidities, improvement of quality of life, and incidence of complications after laparoscopic sleeve gastrectomy. The morbidly obese patients (body mass index [BMI] > 40 kg/m² or > 35 kg/m² with obesity-related comorbidities) in the study were divided into two equal groups: (1) Group 1 (48 patients) underwent laparoscopic sleeve gastrectomy with a 2 cm distance from the pylorus resection distance and (2) Group 2 (48 patients) underwent laparoscopic sleeve gastrectomy with a 6 cm distance from the pylorus resection distance. Body weight, BMI, bariatric quality of life, lipid profile, and comorbidities were evaluated pre- and post-operatively for a duration of 12 months.

RESULTS

Statistically, no significant differences between the two study groups regarding the excess weight loss percentage, comorbidity resolution throughout the postoperative follow-up, enhancement of the quality of life score throughout the postoperative follow-up, or incidence of complications (25% in Group 1 versus 25% in Group 2, p > 0.05) were found.

CONCLUSION

Laparoscopic sleeve gastrectomy was an effective and safe management for morbid obesity and obesity-related comorbidities with significant short-term weight loss; it also improved weight-related quality of life and had an acceptable complication rate. The distance from the pylorus resection distance did not affect the short-term effects of laparoscopic sleeve gastrectomy regarding excess weight loss percentage, resolution of comorbidities, change in quality of life, or occurrence of complications.

Geometry of Sleeve Gastrectomy Measured by 3D CT Versus Weight Loss: Preliminary Analysis

BACKGROUND

The size of the remnant stomach with respect to weight loss failure after laparoscopic sleeve gastrectomy (LSG) remains controversial. This study aimed to evaluate the impact of the actual size and volume of the remnant stomach, as measured by three-dimensional computed tomography (3D-CT) volumetry, on weight loss after LSG.

METHODS

The clinical outcomes of 52 patients who underwent LSG between October 2008 and February 2019 were assessed. Weight metrics were recorded at 1, 3, and 6 months and 1 year postoperatively. 3D-CT volumetry was performed 1 year postoperatively, and the total remnant stomach volume (TSV), proximal stomach volume (PSV), antral stomach volume (ASV), and the distance between the pylorus and the distal edge of staple line (DPS) were measured. The relationship between the weight metrics and aforementioned factors was analyzed.

RESULTS

Of the 52 patients who underwent LSG, 40 patients participated in this study. The average body mass index preoperatively was 38.3 ± 5.1 kg/m², and the average percentage of total weight loss (%TWL) 1 year after LSG was 26.6 ± 9.3%. The average TSV, PSV, ASV, and DPS were 123.2 ± 60.3 ml, 73.4 ± 37.2 ml, 49.8 ± 30.3 ml, and 59.9 ± 18.5 mm, respectively. The DPS (r = - 0.394, p = 0.012) and ASV (r = - 0.356, p = 0.024) were correlated with %TWL 1 year postoperatively.

CONCLUSIONS

The actual DPS and ASV measured by 3D-CT affected weight loss after LSG. 3D-CT may be useful for the immediate identification of factors affecting insufficient weight loss in patients; this may, in turn, aid in the implementation of early intervention treatments.

The role of extended antral resection on weight loss and metabolic response after sleeve gastrectomy: A retrospective cohort study

Objective:

The impact of extended antral resection (AR) after laparoscopic sleeve gastrectomy (LSG) on clinical results is still not clearly elucidated with conflicting results. Our study aimed to determine whether AR is superior to antral preservation (AP) regarding clinical results.

Methods:

Patients were divided into two groups according to the distance of gastric division as AR group (2cm from pylorus) and AP group (6cm from pylorus). Postoperative excess weight loss percentile (%EWL) and total body weight loss percentiles (%TBWL) at the end of first, 6^th and 12 months were compared. Secondly, metabolic parameters and complications were compared.

Results:

The first 68 patients underwent AP, and the following 43 patients underwent AR. Although statistically not significant, AR achieve more %EWL and %TBWL at the end of the first year, (P>0.05). On the other hand, metabolic parameters were similar at the end of the first year, (P>0.05). Resolution of comorbidities were statistically not different, (P>0.05). Staple line leak occurred in two patients of the AR group (4.7%) and two patients of the AP group (2.9%), (P>0.05).

Conclusion:

Both AR and AP seem to be equally effective in resolution of metabolic response. Although statistically not significant- AR provided more %EWL and %TBWL at the end of 12 months.

Thyroid Hormone Changes After Sleeve Gastrectomy With and Without Antral Preservation

BACKGROUND

The effect of bariatric surgery on thyroid hormone changes yielded inconsistent results. The aim of the present study was to assess the change of thyroid hormone levels following laparoscopic sleeve gastrectomy (LSG), with or without antral preservation (AP).

METHODS

Thyroid hormones (TSH, FT3, FT4) were examined preoperatively, at the end of the first postoperative month, and first postoperative year. Secondly, antral resection (AR) and AP were compared at inducing weight loss and thereby affecting thyroid hormone levels.

RESULTS

Euthyroid obese patients (86 female/20 male) underwent LSG. Of these, 58 patients underwent AR and 48 patients AP. The mean FT3 levels significantly decreased both in the first postoperative month and the first year (P < 0.001), whereas mean TSH levels decreased significantly in the first postoperative year (P < 0.001). FT4 levels remained nearly unchanged (P = 0.517). Postoperative first year body mass index (BMI) loss, excess BMI loss percentile (%EBMIL), and total body weight loss percentile (%TWL) were significantly higher in AR group than the AP group (P ≤ 0.01). When the change in thyroid hormone levels was analyzed by pyloric distance according to time periods, no significant difference was found in TSH and FT4 levels (P > 0.05); however, reduction in FT3 levels was significantly greater in patients with AR than in AP patients (P = 0.028).

CONCLUSION

LSG promotes significant reduction in TSH and FT3 levels, whereas FT4 levels remain unchanged. LSG with AR provides more weight loss in short term and appears to be more effective at lowering FT3 levels.

Does antrum size matter in sleeve gastrectomy? A prospective randomized study

BACKGROUND

Laparoscopic sleeve gastrectomy (LSG) is a safe and effective bariatric procedure in terms of excess weight loss. Nevertheless, controversies still exist on several technical and operative aspects of LSG. The aim of this study is to evaluate variations in anthropometric features in subjects with a LSG gastric resection starting from 2 cm or 6 cm from the pylorus. Secondary aim was the evaluation of differences in morbidity, food tolerance, and GERD incidence studied with upper endoscopy (UE) and GERD Health-Related Quality-of-Life score.

METHODS

Patients were prospectively randomized into 2 groups: Group A (at 2 cm proximally to the pylorus) and Group B (at 6 cm proximally to the pylorus). All patients were followed-up at 3, 6, 12, and 24 months. UE was performed in all patients at 12 or 24 months.

RESULTS

One hundred and fifty met the inclusion criteria and were enrolled in the study. The anthropometric features (BMI, %EWL, %TWL) resulted statistically different in the first 12 months (24.2 ± 3.4 vs 27.5 ± 4.3, 63.7 ± 14.1 vs 59.6 ± 12.5 and 42.9 ± 7.4 vs 38.2 ± 6.2), in favor of group A. At 24 months the differences disappeared (25.2 ± 4.4 vs 26.2 ± 3.3, 62.8 ± 13.1 vs 61.6 ± 10.5 and 41.9 ± 7.4 vs 40.2 ± 6.2). An increased GERD was found in both groups postoperatively with a higher incidence in group A at 6-month follow-up.

CONCLUSION

Performing the LSG with a radical antrectomy could improve weight loss at 12-month follow-up but expose to lower food tolerance and higher transitory GERD. The differences seem to be reduced to a 24-month.

Effect of Resection Distance from Pylorus on Weight Loss Outcomes in Laparoscopic Sleeve Gastrectomy

BACKGROUND

Despite the established efficacy and safety of laparoscopic sleeve gastrectomy (LSG), controversy still exists on optimal operative technique, the resection distance from pylorus (DP) being among the most controversial issues. This study aimed to examine the effect of resection distance from pylorus on % excess weight loss (EWL) during postoperative period, in patients who underwent LSG for morbid obesity.

METHODS

A total of 390 patients who underwent laparoscopic sleeve gastrectomy for morbid obesity were included in this retrospective study. Patients were allocated into one of the two groups based on the distance between antrum resection margin and pylorus: group A, ≤ 3 cm and group B, > 3 cm. Follow-up data for %EWS and nausea/vomiting as well as demographical and perioperative data were retrospectively reviewed and logistic regression analysis was done.

RESULTS

Follow-up data up to 12 months were available for all patients, whereas 199 patients had follow-up data at 24 months. Shorter distance from pylorus was associated with higher %EWL throughout the treatment period (p < 0.001), evident from the first postoperative month (p = 0.013 for the first month, p < 0.001 for all other time points). The benefit extended up to 24 months in ≤ 3 cm group. However, nausea/vomiting was more frequent in the ≤ 3 cm group only at 1-month visit (15% vs. 4%, p < 0.001). In multivariate evaluations, while %EWL variable was taken as a dependent variable, time variable with DP × time interaction was statistically significant in the model.

CONCLUSIONS

Our findings indicate that a short distance between resection margin and pylorus is associated with better and sustained %EWL in LSG. However, these patients seem to be more prone to nausea and vomiting in the early postoperative period. Further prospective large studies would help to define an optimal resection distance.

Food Tolerance After Laparoscopic Sleeve Gastrectomy with Total Antral Resection

BACKGROUND

Among the controversial points in laparoscopic sleeve gastrectomy (LSG) is how much of the antrum to be resected. This study aimed to evaluate food tolerance after preservation or resection of the antrum during LSG.

METHODS

Prospective randomized study included 50 patients scheduled for LSG. Participants were randomly allocated into one of two groups. In antral resection (AR-LSG) group (n = 25), resection started 2 cm from the pylorus. In antral sparing (AS-LSG) group (n = 25), it started 6 cm from the pylorus. Percentage of excess weight loss (%EWL) and percentage of excess BMI loss (%EBL) were evaluated after 3 and 6 months. Quality of life (QOL) was evaluated by using the Bariatric Analysis and Reporting Outcome System (BAROS). Food tolerance was assessed using the Quality of Alimentation questionnaire. Primary outcome measure was food tolerance and %EWL.

RESULTS

Food tolerance was significantly better in the antral sparing group compared to the antral resection group after 3 and 6 months. The two groups were comparable in %EWL and BMI change after 3 and 6 months. Six months after surgery, the majority of patients had a very good quality of life, with no significant difference between the two groups (p = 0.877). There was no significant difference between the two groups in operative time, intraoperative blood loss, and hospital stay.

CONCLUSIONS

Preservation of the pyloric antrum during LSG is associated with significantly better food tolerance and comparable effect of weight loss up to 6 months postoperatively when compared with total antral resection.

Presurgical Predictive Factors of Excess Weight Loss After Laparoscopic Sleeve Gastrectomy

PURPOSE

Conditions associated with surgical technique and postoperative lifestyle changes, as well as the characteristics of patients, may affect weight loss following laparoscopic sleeve gastrectomy. In this study, the effects of age, gender, BMI, and excess weight at the time of surgery on weight loss during follow-up were examined.

MATERIALS AND METHODS

Demographic data (age, gender), preoperative BMI, and weight values of the patients were recorded. TWL% and EWL% values of patients were recorded during follow-up at 1st, 3rd, 6th, 9th, 12th, and 18th months. Patients were grouped according to age (AGE1 < 30, AGE2 30-50, AGE3 ≥ 50 years), BMI at the time of surgery (BMI1 ≤ 50, BMI2 > 50 kg/m²), and EW at the time of surgery (EW1 ≤ 60, EW2 > 60 kg). EWL% values obtained in the follow-up visits were compared among the gender, age, BMI, and EW groups.

RESULTS

A total of 456 patients (371 females, 85 males) were operated. Mean EWL% was lower in AGE3 group (p < 0.001). Patients in AGE1 group had the highest mean EWL%, while those in BMI2 and EW2 groups had lower mean EWL% values throughout the follow-up period (p < 0.001). Regression analysis showed that age and BMI were associated with EWL% at all follow-up visits (p < 0.05).

CONCLUSION

Patients with less than 60 kg of excess weight, those with BMI ≤ 50 kg/m² and younger patients may lose weight more effectively following LSG.

Weight Regain After Bariatric Surgery-A Multicentre Study of 9617 Patients from Indian Bariatric Surgery Outcome Reporting Group

BACKGROUND

There is little robust data on weight regain (WR) after bariatric surgery making it difficult to counsel patients regarding long-term outcomes of different bariatric procedures. The purpose of this study was to see WR in medium and long term after SG, RYGB, and OAGB in Indian population.

METHODS

In a multicentre study, data on preoperative and postoperative weights over 5 years were collected. Multiple definitions were applied to find the proportion of patients with significant WR increase of 25% of lost weight from nadir (definition 1), weight gain of > 10 kg from nadir (definition 2), and BMI gain of > 5 kg/m² from nadir (definition 3). The proportion of those with significant WR was compared across sub-groups.

RESULTS

A total of 9617 patients were included. Median WR at 5 years was 14.1% of lost weight, 1.92 kg/m², and 5 kg. Significant WR using definition 1 was 35.1%, 14.6%, and 3% after sleeve gastrectomy (SG), Roux-en-Y gastric bypass (RYGB), and mini-one anastomosis gastric bypass (OAGB) respectively. Severe albumin deficiency was highest in OAGB (5.9%) patients followed by SG (2.9%) and RYGB (2.2%) at 5 years(p = 0.023). Haemoglobin levels < 10 g/dL were seen in 8.2%, 9.0%, and 13.9% of SG, RYGB, and OAGB patients respectively (p = 0.041).

CONCLUSIONS

In the first comparative study of WR, OAGB had lesser WR in comparison to SG and RYGB but had the most impact on Hb and albumin levels in the long term. Definition selection for reporting WR has a significant impact on the results. There is a need for standardising the reporting of WR in bariatric literature.

Weight regain after bariatric surgery: a systematic literature review and comparison across studies using a large reference sample

Published estimates of weight regain (WR) after bariatric surgery vary greatly. Understanding the sources of variability in the literature and clarifying the magnitude of WR after Roux-en-Y gastric bypass (RYGB) and sleeve gastrectomy (SG) are critical for informing expectations and planning interventions. A literature search through January 2019 yielded 15 English-language studies that reported WR in at least 30 participants, not selected based on weight loss or WR, at least 3 years after primary RYGB (n = 11) or SG (n = 5). Median follow-up was 5.0 (range, 3.2-10.0) years. Median sample size was 62 (range, 33-464). Samples represented a median of 54.3% (range, 10.7%-100%) of eligible participants. Nadir weight was determined by serial research assessments (n = 1), medical records (n = 7), participant recall (n = 4), or an undisclosed method (n = 4). Three continuous and 8 binary WR measures (the latter, based on various thresholds for clinically meaningful WR) were reported. To enable comparison across studies, the percentage difference in WR in each study versus a reference sample (n = 1433 RYGB), matched on time since surgery and WR measure, was calculated. Median WR in the reference sample increased from 8.2 (25th-75th percentile: 0-19.5) to 23.8 (25th-75th percentile: 9.0-33.9) percent of maximum weight lost, 3 to 6 years post RYGB surgery. Studies of RYGB versus SG, with larger versus smaller samples, with higher versus lower participation rates, that determined nadir weight via participant recall versus medical records, and reported continuous versus binary WR measures tended to have WR values closer to the reference sample and each other. Variation in WR estimates was explained by heterogeneity in WR measures, timing of assessment, surgical procedure, and study design characteristics. The best estimate of WR after RYGB likely comes from the large reference sample. WR after SG versus RYGB appears higher. However, additional high-quality studies with uniform reporting of WR by surgical procedure are needed.

Laparoscopic vertical sleeve gastrectomy, long and short-term impact on weight loss and associated co-morbidities

The laparoscopic vertical sleeve gastrectomy (LVSG) has become the most popular operation for the treatment of morbid obesity in the United States. Being a purely restrictive procedure, the LVSG works to reduce the caloric intake of patients as well as decrease appetite through removal of ghrelin producing cells. Initially developed as the first part of a combined two step restrictive and malabsorptive procedure, the LVSG developed as a standalone procedure when patients lost significant weight with the restrictive portion of the operation alone. Short term outcomes have been promising in terms of weight loss and resolution of comorbid conditions. Long term outcomes are still evolving, but do demonstrate durable weight loss for a significant number of patients. Concerns with the LVSG in the long term revolve around development or worsening of gastroesophageal reflux disease or weight regain. The LVSG has been demonstrated to be a useful tool in the surgical management of morbid obesity.

Ongoing Inconsistencies in Weight Loss Reporting Following Bariatric Surgery: a Systematic Review

Weight loss is the primary outcome following bariatric surgery; however, its documentation within current literature is heterogeneous and poorly defined, limiting meaningful comparison between studies. Randomized controlled trials from 2012 to 2016 were identified using the Medline database through "Gastric bypass OR sleeve gastrectomy AND weight" search terms. A total of 73 studies with 5948 patients were included. Reporting of preoperative weight was done primarily using mean body mass index (BMI) (87.7%) and mean weight (65.8%). Postoperative weight reporting was more variable, with the most frequently reported measure being mean postoperative BMI (71.2%). Overall, nearly one third of all bariatric literature contained discrepancies that precluded meaningful meta-analysis. Reporting of weight loss following bariatric surgery is becoming increasingly diverse for both pre- and post-operative outcomes. Ongoing heterogeneity will continue to act as a barrier to meaningful comparison of bariatric outcomes until standardized reporting practices become adopted.

Loss and Regain of Weight After Laparoscopic Sleeve Gastrectomy According to Preoperative BMI : Late Results of a Prospective Study (78-138 months) with 93% of Follow-Up

INTRODUCTION

The long-term results in sleeve gastrectomy (SG) have been reported in few publications. None of them has evaluated the importance of preoperative BMI (kg/m²) in the final results.

OBJECTIVE

To determine the loss and regain of weight after SG, determining the influence of preoperative BMI in final results.

MATERIAL AND METHODS

This prospective study included all patients operated between 2006 and 2010. Exclusion criteria corresponded to patients with Barrett's esophagus, type 2 diabetes, and hiatal hernia greater than 3 cm. Patients were followed and controlled "face to face" by the main author.

RESULTS

From 109 original patients included in this study, 102 (93.5%) completed the late follow-up. Patients were divided into four groups: (a) I-29 patients with BMI 32.1-34.9; (b) II-56 patients with BMI 35-39.9; (c) III-20 patients with BMI 40-49.9; and (d) IV-4 patients with BMI > 50. There was a significant decrease in the BMI 12 to 24 months after surgery. At the late control, patients in groups III and IV regained weight in 85 and 100%, respectively. Patients in groups I and II had 3.6 and 38% of weight regain.

CONCLUSION

The changes in weight after SG are directly related to preoperative BMI: the higher this value, the higher the percentage of failure and weight regain late after surgery. Besides, laparoscopic SG seems to be an adequate operation at late control in terms of loose of weight after surgery in patients with a BMI less than 40 kg/m² before surgery.

A Randomised Trial of Text Message Support for Reducing Weight Regain Following Sleeve Gastrectomy

INTRODUCTION

Sleeve gastrectomy (SG) is a common bariatric procedure with high rates of weight regain (WR). Clinicians and patients have identified a lack of follow-up support and maladaptive lifestyle behaviours as potential causes for WR. While text message support has been shown to be effective for weight loss in non-surgical patients, it has not been investigated for reducing WR in bariatric patients.

PURPOSE

To determine the effectiveness of text message support in reducing weight regain following sleeve gastrectomy.

METHODS

A text message intervention was designed. The effectiveness of the intervention was investigated by a randomised trial powered to detect a 15% difference in the primary outcome of percent excess weight loss (84 participants required). Secondary outcomes were the Bariatric Analysis and Reporting System (BAROS) score and patient satisfaction. Outcomes were assessed at 6 and 12 months.

RESULTS

Ninety-five participants were randomised to either standard care or text message support (daily text message for 1 year). While there was no significant difference in the primary outcome at 6 or 12 months, patients who received the intervention tended to have less WR and a significantly better BAROS score at 12 months. Participants who received text message support found it beneficial, would have liked the messages to continue, and felt WR was reduced by having the text message support.

CONCLUSION

Text message support following SG is feasible, may reduce weight regain, improves the BAROS score and is valued by patients.

TRIAL REGISTRATION

NCT02341001.

The Distance between the Pylorus and Left Vagus Nerve during Sleeve Gastrectomy

The sleeve gastrectomy (SG) can be performed with or without antral preservation (distance from the pylorus <50 mm). The objective of this study was to evaluate the distance between the pylorus and the end of the left vagus nerve in order to determine whether it could be used as a constant anatomical landmark to start gastric transection. This was a prospective, nonrandomized study of 120 patients undergoing SG from January to October 2018. The distance measurement between pylorus and vagus nerve was performed at the beginning of the SG. The primary endpoint was the distance between the beginning of the pylorus and the end of the second branch of the vagus nerve on the upper edge of the antrum. The secondary endpoints was the correlation factors between the preoperative data and the position of the end of the vagus nerve. A total of 120 patients, with a mean body mass index of 42.2 kg/m² , underwent primary SG. The mean distance between pylorus and the end of the vagus nerve was 50.4 mm (35-64) on the upper part of the antrum. When considering the inferior part of the antrum, the minimum distance was 50 mm. No correlations were found between preoperative data and distance measurements. The vagus nerve can be considered as a constant and reliable anatomical landmark for performing SG with antral preservation. However, no correlation was found between the preoperative data and the location of the end of the vagus nerve. Clin. Anat. 33:562-566, 2020. © 2019 Wiley Periodicals, Inc.

Comparison of laparoscopic sleeve gastrectomy leak rates in five staple-line reinforcement options: a systematic review

Background

Staple-line leaks following laparoscopic sleeve gastrectomy (LSG) remain a concerning complication. Staple-line buttressing is largely adopted as an acceptable reinforcement but data regarding leaks have been equivocal. This study compared staple-line leaks in five reinforcement options during LSG: no reinforcement (NO-SLR), oversewing (suture), nonabsorbable bovine pericardial strips (BPS), tissue sealant or fibrin glue (Seal), or absorbable polymer membrane (APM).

Methods

This systematic review study of articles published between 2012 and 2016 regarding LSG leak rates aligned with the Preferred Reporting Items for Systematic Reviews and Meta-Analyses guidelines. Variables of interest included leak rates, bleeding, and complications in addition to surgical and population parameters. An independent Fisher’s exact test was used to compare the number of patients with and without leaks for the different reinforcement options.

Results

Of the 1633 articles identified, 148 met inclusion criteria and represented 40,653 patients. Differences in age (older in APM; p = 0.001), starting body mass index (lower in Suture; p = 0.008), and distance from pylorus (closer in BPS; p = 0.04) were observed between groups, but mean bougie size was equivalent. The overall leak rate of 1.5% (607 leaks) ranged from 0.7% for APM (significantly lower than all groups; p ≤ 0.007 for next lowest leak rate) to 2.7% (BPS).

Conclusions

This systematic review of staple-line leaks following LSG demonstrated a significantly lower rate using APM staple-line reinforcement as compared to oversewing, use of sealants, BPS reinforcement, or no reinforcement. Variation in surgical technique may also contribute to leak rates.

Electronic supplementary material

The online version of this article (10.1007/s00464-019-06782-2) contains supplementary material, which is available to authorized users.

Predictors of weight regain after sleeve gastrectomy: an integrative review

BACKGROUND

Sleeve gastrectomy (SG) is one of the most effective treatments for severe obesity, but weight regain after surgery is a challenging issue. The mechanism of postoperative weight relapse is barely understood because of the lack of long-term data.

OBJECTIVES

To review and synthesize current evidence related to factors that contribute to weight regain after SG.

METHODS

Whittemore and Knafl's integrative method guided the research. The databases PubMed, EMBASE, and CINAHL, as well as 2 selected journals, were searched through October 2018 to gather English-language journal articles on the potential predictors of post-SG weight regain among adult populations. Only articles with sample size ≥10 were included. A narrative synthesis was used to analyze the 17 studies included in the review.

RESULTS

In recent years there has been an upward trend in the published reports of SG on longer-term outcomes. After a review of 6863 records, 17 eligible studies were identified, reporting various definitions of weight regain and 3 main categories of predictors: surgical/anatomic factors, hormonal/metabolic imbalance, and behavioral/mood factors. The 17 studies used quantitative (n = 16) and qualitative methods (n = 1).

CONCLUSION

There is a dearth of available literature addressing predictors of weight regain after SG, and the inconsistency in the definition of regain limited the comparability between studies. Besides the surgical/anatomic factors that have been reported as significant predictors, other modifiable factors such as behavioral and psychosocial determinants need to be further investigated.

High-Amplitude Gastric Contractions following Laparoscopic Sleeve Gastrectomy

A proportion of laparoscopic sleeve gastrectomy patients experience symptoms of regurgitation and epigastric pain postoperation. The appearance of gastric sleeve contractions has been documented but its implications have not been adequately investigated. This case describes a 61-year-old female following laparoscopic sleeve gastrectomy. The patient underwent high-resolution impedance esophageal manometry that identified compartmentalized pressurization leading to propagating contractions throughout the gastric sleeve. Combined treatment with calcium channel blockers and gastric sleeve dilation relieved all symptoms. This case highlights the application of high-resolution impedance esophageal manometry to assess motor function and bolus transit in patients following laparoscopic sleeve gastrectomy.

30-day outcomes of robot-assisted versus conventional laparoscopic sleeve gastrectomy: First analysis based on MBSAQIP

BACKGROUND

Sleeve gastrectomy (SG) is the most popular bariatric procedure in the United States. Although standardized, variation exists in how the staple line is managed. Robotic approaches to SG (RSG) are increasing, though benefits compared with the conventional laparoscopic approach (LSG) remain controversial.

OBJECTIVE

Evaluate the safety of RSG versus LSG using the Metabolic and Bariatric Surgery Accreditation and Quality Improvement Program data registry, controlling for variation in staple-line management.

SETTING

University health network, United States.

METHODS

SG cases from January 1 to December 31, 2016, in the Metabolic and Bariatric Surgery Accreditation and Quality Improvement Program data registry were included. Demographic characteristics and 30-day outcomes were analyzed with separate Mann-Whitney rank sums tests, χ² tests, or Fisher's exact tests, with P < .05 denoting statistical significance. Multivariate regression analysis was performed to control for method of staple-line treatment.

RESULTS

Of the 107,726 patients who underwent SG, 7385 were RSG. Treatment of the staple line was associated with a significantly lower rate of bleeding, with odds ratios of .69 and .58 for staple-line reinforcement alone and staple-line reinforcement plus oversewing, respectively. Multivariate analysis revealed RSG had a higher rate of organ space infection than LSG (odds ratio 2.07). Otherwise, RSG did not significantly differ from LSG save for a longer median operative time (89 versus 63 min, respectively, P < .0001).

CONCLUSIONS

RSG is a growing alternative to the conventional laparoscopic approach. According to the 2016 Metabolic and Bariatric Surgery Accreditation and Quality Improvement Program database, the RSG carries a higher risk of organ space infection. The reasons behind this finding require further study.

Weight Loss and Resolution of Comorbidities After Sleeve Gastrectomy: A Review of Long-Term Results

BACKGROUND AND AIMS:

Laparoscopic sleeve gastrectomy (SG) has massively increased in numbers over the last decade and is the most frequently performed bariatric procedure worldwide today. The aim of this review is to evaluate SG in terms of weight loss and resolution of comorbidities, based on data gained from the latest long-term studies available.

MATERIAL AND METHODS:

This review includes the results of any long-term studies on SG available at this point as well as a selection of short- and mid-term studies.

RESULTS:

There are only a handful of studies on sleeve gastrectomy with long-term follow-up available at this point. Conversion rates in these long-term studies amount to up to one-third of their cohorts; however, excess weight loss in patients maintaining their sleeve is over 50%. Results on the resolution of comorbidities vary among the studies available today.

SUMMARY:

Sleeve gastrectomy is a valid bariatric method but one has to be aware of its limitations.

Banded Sleeve Gastrectomy: Better Long-Term Results? A Long-Term Cohort Study Until 5 Years Follow-Up in Obese and Superobese Patients

INTRODUCTION

The failure rate of the laparoscopic sleeve gastrectomy (LSG) is increasing. Gastric pouch dilation is frequently suggested to be one of the causes for the failure. The banded laparoscopic sleeve gastrectomy (BLSG) has been proposed to overcome this complication. This is the first study that reports the long-term outcome (> 5 years) of BLSG in obese and superobese patient population.

MATERIALS AND METHODS

One hundred and forty-seven patients (n = 51, non-banded LSG (NLSG)/n = 96, BLSG) were followed up for 5 years. Patients were evaluated for % excess weight loss (%EWL), % excess body mass index loss (%EBMIL), weight regain, BMI, and complications. Weight loss analysis was also done between banded and non-banded superobese patient populations.

RESULT

There was statistical significant difference between two groups at each given time point in terms of %EWL and %EBMIL. NLSG group had higher weight loss failure rate (35.2%) and weight regain (19.6%) at the 5-year follow-up compared to BLSG group (P < 0.001). There was no statistical significant difference in weight loss between obese and superobese BLSG group. The complication rates were more with BLSG group (14.5%) compared to NLSG group (9.8%); no signs of band slippage, erosion, or migration were seen. There was no mortality seen.

CONCLUSION

BLSG surgery was found to be safe and effective in maintaining weight loss on the long term compared to the NLSG group with low incidence of band-related problems. Additionally, the NLSG group had a higher rate of weight loss failure and weight regain at 5 years compared to the BLSG group.

Impact of Laparoscopic Sleeve Gastrectomy on Gastrointestinal Motility

Objective

Laparoscopic sleeve gastrectomy (LSG) was considered mainly as a restrictive procedure due to anatomic alterations in the upper gastrointestinal tract. Additionally, due to neurohormonal alterations, LSG modifies the gastrointestinal motility, which controls appetite and feeling of satiety.

Aim

The aim of the study was to review the impact of laparoscopic sleeve gastrectomy on gastrointestinal motility.

Material and Methods

A search of the medical literature was undertaken in Pubmed, Web of Science, and Cochrane library. Esophageal, gastric, bowel motility were assessed separately.

Results

Nine studies assessed esophageal motility. The data remain debatable attributing to the heterogeneity of follow-up timing, surgical technique, bougie size, and distance from pylorus. The stomach motility was assessed in eighteen studies. Functionally, the sleeve was divided into a passive sleeve and an accelerated antrum. All scintigraphic studies revealed accelerated gastric emptying after LSG except of one. Patients demonstrated a rapid gastroduodenal transit time. The resection of the gastric pacemaker had as a consequence aberrant distal ectopic pacemaking or bioelectrical quiescence after LSG. The bowel motility was the least studied. Small bowel transit time was reduced; opposite to that the initiation of cecal filling and the ileocecal valve transit was delayed.

Conclusion

Laparoscopic sleeve gastrectomy has impacts on gastrointestinal motility. The data remain debatable for esophageal motility. Stomach and small bowel motility were accelerated, while the initiation of cecal filling and the ileocecal valve transit was delayed. Further pathophysiological studies are needed to evaluate the correlation of motility data with clinical symptoms.

Antral resection versus antral preservation during laparoscopic sleeve gastrectomy for severe obesity: Systematic review and meta-analysis

Although laparoscopic sleeve gastrectomy is an established operation for severe obesity, there is controversy regarding the extent to which the antrum is excised. The objective of this systematic review was to investigate the effect on perioperative complications and medium-term outcomes of antral resecting versus antral preserving sleeve gastrectomy. MEDLINE, EMBASE, and Cochrane databases were searched from 1946 to April 2017. Eligible studies compared antral resection (staple line commencing 2-3 cm from pylorus) with antral preservation (>5 cm from pylorus) in patients undergoing primary sleeve gastrectomy for obesity. Meta-analyses were performed with a random-effects model, and risk of bias within and across studies was assessed using validated scoring systems. Eight studies (619 participants) were included: 6 randomized controlled trials and 2 cohort studies. Overall follow-up was 94% for the specified outcomes of each study. Mean percentage excess weight loss was 62% at 12 months (7 studies; 574 patients) and 67% at 24 months (4 studies; 412 patients). Antral resection was associated with significant improvement in percentage excess weight loss at 24-month follow-up (mean 70% versus 61%; standardized mean difference .95; confidence interval .35-1.58, P<.005), an effect that remained significant when cohort studies were excluded. There was no difference in incidence of perioperative bleeding, leak, or de novo gastroesophageal reflux disease. According to the available evidence, antral resection is associated with better medium-term weight loss compared with antral preservation, without increased risk of surgical complications. Further randomized clinical trials are indicated to confirm this finding.

Weight Regain Following Sleeve Gastrectomy-a Systematic Review

Sleeve gastrectomy (SG) is a commonly performed bariatric procedure. Weight regain following SG is a significant issue. Yet the defining, reporting and understanding of this phenomenon remains largely neglected. Systematic review was performed to locate articles reporting the definition, rate and/or cause of weight regain in patients at least 2 years post-SG. A range of definitions employed to describe weight regain were identified in the literature. Rates of regain ranged from 5.7 % at 2 years to 75.6 % at 6 years. Proposed causes of weight regain included initial sleeve size, sleeve dilation, increased ghrelin levels, inadequate follow-up support and maladaptive lifestyle behaviours. Bariatric literature would benefit from standardising definitions used to report weight regain and its rate in clinical series. Larger prospective studies are required to further understand mechanisms of weight regain following SG.

Weight Regain Following Sleeve Gastrectomy-a Systematic Review

Sleeve gastrectomy (SG) is a commonly performed bariatric procedure. Weight regain following SG is a significant issue. Yet the defining, reporting and understanding of this phenomenon remains largely neglected. Systematic review was performed to locate articles reporting the definition, rate and/or cause of weight regain in patients at least 2 years post-SG. A range of definitions employed to describe weight regain were identified in the literature. Rates of regain ranged from 5.7 % at 2 years to 75.6 % at 6 years. Proposed causes of weight regain included initial sleeve size, sleeve dilation, increased ghrelin levels, inadequate follow-up support and maladaptive lifestyle behaviours. Bariatric literature would benefit from standardising definitions used to report weight regain and its rate in clinical series. Larger prospective studies are required to further understand mechanisms of weight regain following SG.

Influence of antrum size on gastric emptying and weight-loss outcomes after laparoscopic sleeve gastrectomy (preliminary analysis of a randomized trial)

BACKGROUND

Laparoscopic sleeve gastrectomy (LSG) has increased in popularity in recent years as a definitive bariatric procedure. Despite its growing popularity worldwide, the surgical technique is not well standardized. There is a lack of evidence on the matter of the antrum size and its relation to gastric emptying and weight-loss outcomes. The aim of the study is to evaluate the influence of antrum size over gastric emptying and weight-loss outcomes.

METHODS

Twenty-five patients were prospectively randomized according to the distance between the first firing and the pylorus: AR group (antrum resection-2 cm from the pylorus) and AP group (antrum preservation-5 cm from the pylorus). Gastric emptying (%GE) was evaluated by a gastric emptying scintigraphy before surgery, 2 months and 1 year after LSG. Antrum volume was measured using a MultiSlice CT Scan performed 2 months and 1 year after surgery. The percent of excess weight loss (%EWL) was calculated after 1 year follow-up.

RESULTS

At 2 months after LSG the mean %GE was 69.7 ± 18 in the AR group and 72.8 ± 20 in the AP group (p = 0.69). At 1 year it was 66.5 ± 21 and 74.2 ± 16 in the AR and AP groups, respectively (p = 0.30). A significant accelerated gastric emptying was observed at 2 months (p = 0.025) and at 1 year (p = 0.013) in the AP group. Meanwhile in the AR group this increase was not significant (p = 0.12 at 2 months and p = 0.21 at 1 year). Differences regarding the %EWL between groups were no statistically significant (p = 0.74).

CONCLUSIONS

After LSG there is a global tendency to an accelerated gastric emptying, although only significant in the antrum preservation group; however, no differences were observed regarding the %EWL between groups after 1 year follow-up.

Weight Loss Analysis According to Different Formulas after Sleeve Gastrectomy With or Without Antral Preservation: a Randomised Study

BACKGROUND

The measurement of weight loss after bariatric surgery is under constant review in order to obtain the ideal standard for reporting weight loss. Several formulas have been proposed for this purpose. Our goal is to analyse weight loss after sleeve gastrectomy, with or without antrum preservation through different measurement formulas.

METHODS

A prospective randomised study of 60 patients (30 patients with initial section at 3 cm from pylorus and 30 patients at 8 cm from the pylorus). We calculate the following variables at 3, 6 and 12 months from surgery: BMI, excess weight loss (%EWL), percentage of excess of BMI loss (%PEBMIL), expected BMI, % PEBMIL corrected by EBMI and percentage of total weight loss (%TWL).

RESULTS

Weight evolution is similar in both groups, reaching a mean BMI of 33.62 ± 4.35 and 34.48 ± 4.23 kg/m² respectively 12 months after surgery, closer to expected BMI. TWL follows the same trend, with losses exceeding 30%, although 3 cm group is above the tables of percentiles made with our series. Regarding PEBMIL, the 3 cm group reaches 67.8% classified as excellent, while 8 cm group reaches 62.8% classified as a good result. EWL situates the best results for 3 cm group.

CONCLUSIONS

Group 3 cm obtained a lower percentage of suboptimal results using EWL. %TWL places the 3 cm group in higher percentile than 8 cm group. Through EBMI, both groups are equally effective. It is necessary to have standardised dynamic tables for each surgical technique, becoming essential elements to measure weight loss after surgery.