Marginal ulceration following Roux-en-Y gastric bypass: risk factors for ulcer development, recurrence and need for revisional surgery

Long-Term Results of Linear Versus Circular Stapled Gastrojejunostomy in Gastric Bypass Surgery: A Propensity Score-Adjusted Analysis of Weight Loss and Morbidity

BACKGROUND

Different techniques are used to create a gastrojejunal anastomosis (GJ) in laparoscopic Roux-en-Y gastric bypass (LRYGB). This study compares long-term weight loss and technique-related morbidity between circular (CSA) GJ and linear (LSA) stapled GJ.

METHODS

The clinical data of LRYGB patients prospectively registered in a database were retrospectively analyzed. The primary endpoints were long-term excess weight loss (EWL) and excess BMI loss (EBL). The risk factors were adjusted via propensity score matching (PSM), and the long-term morbidity rates of the procedures were compared as time-to-event-data using hazard ratios (HR).

RESULTS

Two hundred forty-three patients underwent surgery between 2012 and 2014 (CSA n = 109; LSA n = 134). No significant differences in weight development were shown during 6 years postoperatively between CSA and LSA. A mixed effects regression analysis before and after PSM revealed that CSA performed better than LSA after 6 years (potentially biased by low follow-up rates for this period). CSA was associated with higher overall morbidity (LSA 26.1% vs. CSA 38.8%, HR = 1.58, p = 0.048), incisional hernia (LSA 0.7% vs. CSA 6.4%, HR = 10.0, p = 0.006), and GJ stenosis rates (LSA 0% vs. CSA 17.4%, p < 0.001). LSA was associated with marginal ulcers (LSA 8.2% vs. CSA 0.9%, HR = 5.5, p = 0.012).

CONCLUSIONS

Marginal ulcers have been linked to LSA, while CSA has been associated with higher rates of overall morbidity, stenosis of the GJ, and incisional hernia. No difference terms of weight loss were observed between the CSA and LSA groups during the initial six postoperative years. After 6 years, CSA may offer benefits in terms of sustained weight loss; however, the clinical relevance of these differences appears minimal.

Demographic Factors Associated with Postoperative Complications in Primary Bariatric Surgery: A Rapid Review

BACKGROUND

Bariatric surgery is highly effective for the management of severe obesity, but its safety profile is not completely understood. This review aimed to synthesise evidence linking demographic factors to postoperative complications and mortality following primary bariatric surgery.

METHODS

We searched Medline for observational studies of adult patients linking demographic factors to postoperative complications of primary bariatric surgery published from 2017 to 2022. Risk ratios (RR) with 95% confidence intervals (95% CI) were calculated and pooled using random effect meta-analysis. Heterogeneity was quantified using the I2 statistic and tested for statistical significance using the Q-statistic. Sensitivity analyses were used to explore potential sources of heterogeneity.

RESULTS

A total of 71 observational studies (69 cohort, 2 case-control) were reviewed and appraised. Older age was consistently associated with increased risks of postoperative mortality (RR = 2.62, 95% CI 1.63-4.23, I2 = 42.04%), serious complications (RR = 1.76, 95% CI 1.09-2.82, I2 = 93.24%), anastomotic leak (RR = 1.64, 95% CI 1.04-2.58, I2 = 61.09%), and haemorrhage (RR = 1.44, 95% CI 1.07-1.94, I2 = 45.25%). Male sex was associated with increased anastomotic leak (RR = 1.39, 95% CI 1.04-1.87, I2 = 72.36%). Sensitivity analyses did not identify sources of bias. Socioeconomic factors, including Black/African American race, low financial status, and marital status (mixed results), were linked to higher complication risks in some studies.

CONCLUSIONS

Older age and certain demographic factors (male sex, Black/African American race, low financial status, marital status) were associated with increased risks of postoperative complications following primary bariatric surgery.

Nonsteroidal anti-inflammatory drug (NSAID) prescribing after gastrojejunostomy: A preventable cause of morbidity

OBJECTIVE

Study findings showing an association between nonsteroidal anti-inflammatory drug use and marginal ulcer, a significant cause of morbidity after gastrojejunostomy, have been inconsistent. This study aimed to evaluate this relationship in large cohort.

METHODS

This retrospective cohort included adult patients with a history of gastrojejunostomy documented between 2004 and 2023. The electronic medical record was queried for nonsteroidal anti-inflammatory drug prescriptions, marginal ulcer diagnosis, and comorbidities. Multivariable logistic regression was performed to assess the association between marginal ulcer and nonsteroidal anti-inflammatory drug exposures, controlling for smoking, Helicobacter pylori history, acid-suppressing therapy, diabetes, age, and sex.

RESULTS

During the study period, 6,888 patients with a history of gastrojejunostomy were identified, of whom 45.2% (n = 3,115) of patients were exposed to an nonsteroidal anti-inflammatory drug and 10.12% (n = 697) developed a marginal ulcer. On multivariable analysis, the risk of marginal ulcer was found to be dose-dependent, with increasing odds of marginal ulcer with an increasing number of nonsteroidal anti-inflammatory drug exposures from odds ratio 1.67 (95% confidence interval, 1.37-2.02) with 1-2 nonsteroidal anti-inflammatory drug exposures to odds ratio 2.42 (95% confidence interval, 1.79-3.24) with >8 nonsteroidal anti-inflammatory drug exposures. Acid-suppressing therapy was found to be protective (odds ratio, 0.61; 95% confidence interval, 0.52-0.73). Over the last decade, the number of nonsteroidal anti-inflammatory drugs prescribed to patients with gastrojejunostomy has significantly increased from 15.87 prescriptions per 1,000 patients per year to 531.02 per 1,000 patients per year (R2 = 0.91, P < .001).

CONCLUSION

Marginal ulcer after gastrojejunostomy is associated with nonsteroidal anti-inflammatory drug prescriptions in a dose-dependent manner. Although acid-suppressing therapy appears protective for marginal ulcer, quality improvement efforts should focus on diminishing nonsteroidal anti-inflammatory drug prescribing in this population.

Experiencing Complications After Metabolic and Bariatric Surgeries is a Risk Factor for Postoperative Emergency Department Admissions: a Retrospective Cohort Study

BACKGROUND

Emergency department admissions significantly burden hospital staff and countries' health system. Studies are encouraged for effective and correct utilization of emergency departments. Rational management of obesity-related medical problems and postoperative complications may reduce emergency department visits. This study aimed to determine the rates, characteristics, and antecedents of emergency room admissions after metabolic and bariatric surgeries (MBSs) performed in our hospital. According to our hypothesis, experiencing postoperative complications is the most common reason for emergency department admissions.

METHODS

The study was designed as a single-center, retrospective, cohort study. Metabolic and bariatric surgeries performed in our hospital between June 2021 and June 2023 were evaluated. Clavien Dindo Classification was used to classify complications. The reasons for emergency department admissions, re-hospitalization and surgical requirements, time relationships, and possible antecedents were examined in stages.

RESULTS

A total of 153 patients were evaluated in the study. The average follow-up period was found to be 609.63 ± 222.89. The emergency department admission rate following MBSs was found to be 31%, and the admission rate within the first month was 7.8%. The major complication rate following MBSs was 4.6%. Experiencing complications was the most important antecedent for admissions 1 month postoperatively.

CONCLUSIONS

In patients with complications after MBS, the discharge decision should be provided with stricter controls, and outpatient clinic controls should be planned more frequently. Providing training to patients on managing complications should be considered as a strategy that may reduce the number of emergency department visits.

CLINICAL TRIAL REGISTRATION

ACTRN12624000810516.

American Society for Metabolic and Bariatric Surgery literature review on risk factors, screening recommendations, and prophylaxis for marginal ulcers after metabolic and bariatric surgery

BACKGROUND

Marginal ulcers (MU) are a significant postoperative complication following anastomotic metabolic and bariatric surgeries including Roux-en-Y gastric bypass (RYGB), one-anastomosis gastric bypass (OAGB), and biliopancreatic diversion with duodenal switch (BPD/DS). This review summarizes current knowledge on MU risk factors, screening, and prophylactic strategies.

OBJECTIVES

The goal of this review is to examine technical and patient-related risk factors for MU, assess screening strategies, and recommend prophylactic approaches to reduce MU incidence after anastomotic metabolic and bariatric surgery (MBS).

SETTING

A comprehensive review was conducted by members of the American Society for Metabolic and Bariatric Surgery (ASMBS) Clinical Issues Committee, based on available literature from 2000 to the present.

METHODS

A systematic search was performed using Ovid MEDLINE and PubMed databases. Relevant studies were screened for inclusion. Technical and patient-related factors were evaluated, and recommendations for MU prevention were formulated.

RESULTS

Several risk factors for MU were identified, including large gastric pouch size, circular stapled anastomoses, use of nonabsorbable sutures, smoking, nonsteroidal anti-inflammatory drugs use, and immunosuppression. While prophylactic proton pump inhibitor (PPI) therapy is widely recommended, its optimal duration remains debated. The role of Helicobacter pylori in MU development is not clearly defined.

CONCLUSIONS

Prophylactic PPI therapy for at least 3 months postsurgery significantly reduces the risk of MU. Risk stratification and individualized treatment plans are essential to minimize postoperative complications. Further research is needed to clarify the role of H. pylori and optimize prophylactic strategies.

More Anastomotic Ulcers, Less Dumping, and Equal Weight Loss in Long vs. Short Gastric Pouch in Laparoscopic Roux-en-Y Gastric Bypass

BACKGROUND

Anastomotic ulcers (AU) at the gastroenterostomy are a common postoperative complication after laparoscopic Roux-en-Y gastric bypass (LRYGB). Possible risk factors for ulcer formation include active smoking, the use of non-steroidal anti-inflammatory drugs, increased tension or ischemia at the anastomosis, or factors that increase the acid secretion of the gastric pouch. Therefore, a longer gastric pouch may increase risk of AU formation after LRYGB.

METHODS

This study is a retrospective analysis of prospective collected data from patients undergoing LRYGB between 2009 and 2019 with a minimum follow-up of 2 years. In 2018, we changed the operative technique from short to long gastric pouch LRYGB. We analyzed AU formation, dumping syndrome, age, weight evolution, obesity-associated medical problems, and NSAID in two groups: long (LP-GP) vs. short pouch (SP-GP) LRYGB.

RESULTS

A total of 1058 patients were included in the analysis (178 with LP-GP and 880 with SP-GP). A long gastric pouch significantly increased the rate of AU (LP-GP 12.4% vs. SP-GP 2.6%, p ≤ 0.01, OR 5.3). In contrast, the appearance of dumping syndrome improved in patients undergoing LP-GP (LP-GP 49% vs. SP-GP 60%, P ≤ 0.01, OR 1.5). However, no difference was observed between the groups in terms of weight loss in the first 2 years postoperative.

CONCLUSION

LRYGB with a long compared to a short gastric pouch increases the rate of AU while decreasing the appearance of dumping syndrome. These findings influence the postoperative course of patients undergoing LRYGB, particularly concerning prolonged proton pump inhibitor prophylaxis and a possible tailored surgical approach.

ASMBS literature review on the treatment of marginal ulcers after metabolic and bariatric surgery

Marginal ulcers (MUs) encompass a group of mucosal disruptions and subsequent inflammatory changes and their sequala found after Roux-en-Y gastric bypass (RYGB) oneanastomosis gastric bypass (OAGB), and, less commonly, after biliopancreatic diversion with duodenal switch (BPD/DS) or single anastomosis duodeno-ileostomy with sleeve gastrectomy (SADI-S). Prevalence of MU after RYGB ranges from .6%-16%. This review summarizes the current knowledge about the treatment options available for MU after MBS for providers who treat them.

The Relevance of Gastroscopy in the Diagnostic Work-up for Marginal Ulceration in Patients Presenting with Abdominal Pain Following Laparoscopic Roux-en-Y Gastric Bypass

INTRODUCTION AND PURPOSE

It is unknown what the incidence of gastroscopy-diagnosed marginal ulceration is, while gastroscopy is a frequently chosen diagnostic modality in patients presenting with abdominal pain with a Roux-en-Y gastric bypass (RYGB) in history. The aim of this study was to examine the incidence and treatment of gastroscopy-diagnosed marginal ulceration in patients presenting with the first episode of abdominal pain after RYGB, in which gastroscopy is chosen as the first step in the diagnostic work-up.

MATERIAL AND METHODS

A post hoc analysis was performed of a prospective cohort of 2273 patients undergoing RYGB between 2014 and 2019 in a large non-academic hospital with a dedicated bariatric unit. All patients presenting with abdominal pain > 30 days postoperatively were included. Primary outcome was gastroscopy identified marginal ulceration and treatment.

RESULTS

One hundred two out of 498 patients presenting with abdominal pain after RYGB (20%) underwent gastroscopy as the first diagnostic step. In 84% of these patients, no marginal ulcer was found. Marginal ulceration was observed in 16/102 patients (16%). All patients underwent optimization of PPI treatment and lifestyle advises. Seven patients underwent revisional surgery, at a median of 163 days (range 80-1287) after diagnosis.

CONCLUSION

In a minority of patients undergoing gastroscopy for abdominal pain post-RYGB, a marginal ulceration is identified. Revisional surgery is rarely needed in all patients undergoing gastroscopy and only performed after several months when complaints persist despite PPI optimization. Only performing gastroscopy when symptoms persist safely reduces the number of gastroscopy for abdominal pain after RYGB.

Long-Term Follow-Up After Bariatric Surgery: Key to Successful Outcomes in Obesity Management

Background/Objectives: Bariatric surgery (BS) is considered one of the most effective interventions for the treatment of obesity. To achieve optimal long-term results, continuous follow-up (FU) within a multidisciplinary treatment team is essential to ensure patient compliance and maximize the benefits of BS. However, many patients find it difficult to maintain regular FU, which can affect the quality of care and lead to postoperative complications. This review aims to highlight factors that may hinder compliance with FU after BS, examine potential causes and consequences of inadequate FU, and identify strategies to improve patient participation in long-term FU. Methods: The literature search was conducted between October 2023 and June 2024 in Medline (PubMed) and the Cochrane Library datasets. Studies were selected for their relevance to adherence to FU, multidisciplinary approaches, and long-term bariatric outcomes. Results: The pre- and postoperative period is critical for educating patients and healthcare team members about the importance of FU, addressing potential barriers (e.g., logistical, psychological, and social challenges), and highlighting the risk of relapse to obesity after surgery. The lack of a standardized FU protocol leads to differences between medical centers, further impacting patient adherence. Conclusions: Tailored and regularly updated strategies are essential to address individual patient needs and improve adherence to FU. Further research is needed to identify the specific factors that influence variability in long-term BS outcomes, highlighting the need for a patient-centered approach to obesity treatment.

Update on antithrombotic therapy and body mass: a clinical consensus statement of the European Society of Cardiology Working Group on Cardiovascular Pharmacotherapy and the European Society of Cardiology Working Group on Thrombosis

Obesity and underweight are a growing health problem worldwide and a challenge for clinicians concerning antithrombotic therapy, due to the associated risks of thrombosis and/or bleeding. This clinical consensus statement updates a previous one published in 2018, by reviewing the most recent evidence on antithrombotic drugs based on body size categories according to the World Health Organization classification. The document focuses mostly on individuals at the extremes of body weight, i.e. underweight and moderate-to-morbid obesity, who require antithrombotic drugs, according to current guidelines, for the treatment or prevention of cardiovascular diseases or venous thromboembolism. Managing antithrombotic therapy or thromboprophylaxis in these individuals is challenging, due to profound changes in body composition, metabolism and organ function, and altered drug pharmacokinetics and pharmacodynamics, as well as weak or no evidence from clinical trials. The document also includes artificial intelligence simulations derived from in silico pharmacokinetic/pharmacodynamic models, which can mimic the pharmacokinetic changes and help identify optimal regimens of antithrombotic drugs for severely underweight or severely obese individuals. Further, bariatric surgery in morbidly obese subjects is frequently performed worldwide. Bariatric surgery causes specific and additional changes in metabolism and gastrointestinal anatomy, depending on the type of the procedure, which can also impact the pharmacokinetics of antithrombotic drugs and their management. Based on existing literature, the document provides consensus statements on optimizing antithrombotic drug management for underweight and all classes of obese patients, while highlighting the current gaps in knowledge in these complex clinical settings, which require personalized medicine and precision pharmacology.

Early marginal ulceration prevalence following primary RYGB: a rare events model of the MBSAQIP 2015-2021

PURPOSE

Marginal ulceration (MU) following Roux-en-Y gastric bypass (RYGB) is an established complication, with early MU (within 30-days of operation) being less understood compared to its late counterpart. This study aims to identify risk factors for early MU in patients undergoing primary RYGB.

METHODS

Utilizing data from the Metabolic and Bariatric Surgery Accreditation Quality Improvement Project (MBSAQIP 2015-2021), 1,346,468 records were evaluated. After exclusions for revisions, conversions, pediatric cases, nonbinary gender, missing body mass index (BMI) data, and missing operative time; 291,625 cases of primary RYGB were included for full analysis and rare events modeling of early MU.

RESULTS

The prevalence of early MU was .29% (n = 850). Higher rates of early MU were associated with BMI, race, history of diabetes mellitus (DM), prior thrombotic complications (deep vein thrombosis (DVT) and pulmonary embolism (PE)), prior percutaneous cardiac intervention (PTC), immunosuppressive therapy, and anticoagulation status. Additionally, procedural aspects like the nonspecialization of the surgeon and longer operative times also correlated with higher early MU rates. Rare-events regression modeling noted significant associations of early MU with younger age, diabetes requiring insulin, history of PTC, DVT, immunosuppressive therapy, and anticoagulation status.

CONCLUSION

Early MU remains a relatively rare complication. The lower than previously reported occurrence suggests possible improvements in both patient preparation and surgical technique. The identification of relevant risk factors enables better perioperative and intraoperative management of patients at risk of developing early MU.

Nutritional Challenges and Treatment After Bariatric Surgery

Bariatric surgery is an important weight loss tool in individuals with severe obesity. It is currently the most effective long-term weight loss treatment that lowers obesity-related comorbidities. It also has significant physiological and nutritional consequences that can result in gastrointestinal complications and micronutrient deficiencies. After gastric bypass, clinical events that negatively affect nutritional status include malabsorption, dumping syndrome, kidney stones, altered intestinal bile acid availability, bowel obstruction, ulcers, gastroesophageal reflux, and bacterial overgrowth. Risk factors for poor nutritional status and excessive loss of lean body mass and bone include reduced dietary quality and inadequate intake, altered nutrient absorption, and poor patient compliance with nutrient supplementation. There are unique concerns in adolescents, older individuals, and individuals who become pregnant postoperatively. With careful management, health-care professionals can assist with long-term weight loss success and minimize the risk of acute and long-term nutrition complications after bariatric surgery.

Smoking status predicts anastomotic leak after esophagectomy: a systematic review & meta-analysis

BACKGROUND

Anastomotic leak after esophagectomy is a major contributor to surgery-related morbidity and mortality. The purpose of this systematic review was to evaluate if positive-smoking status is associated with the incidence of this complication.

METHODS

A systematic search of MEDLINE, EMBASE, Scopus, Web of Science and Cochrane Library was performed on April 4th, 2023. Inclusion criteria comprised human participants undergoing esophagectomy, age ≥ 18, n ≥ 5, and identification of smoking status. The primary outcome was incidence of anastomotic leak. Sub-group analysis by ex- or current smoking status was performed. Meta-analysis was performed with RevMan 5.4.1 using a Mantel-Haenszel random-effects model. Publication bias was evaluated visually with funnel plots and through the Egger test.

RESULTS

A total of 220 abstracts were screened, of which 69 full-text studies were assessed for eligibility, with 13 studies selected for final inclusion. This included 16,103 patients, of which 4433 were ex- or current smokers, and 9141 were never smokers. Meta-analysis revealed an increased odds of anastomotic leak in patients with a positive-smoking status (current or ex-smokers) compared to never smokers (OR 1.44, 95% CI 1.18-1.76, I2 = 44%, p < 0.001. Meta-analysis of six studies comparing active smokers alone to never smokers identified a significant increased odds of anastomotic leak (OR 1.80, 95% CI 1.25-2.59, p = 0.002, I2 = 0%). Meta-analysis of five studies comparing ex-smokers to never smokers identified a significant increased odds of anastomotic leak (OR 1.36, 95% CI 1.02-1.82, p = 0.04, I2 = 0%). The odds of anastomotic leak decreased among ex-smokers compared to active smokers.

CONCLUSION

The findings of this systematic review and meta-analysis support the association between positive-smoking status and the risk of anastomotic leak after esophagectomy. Results further emphasize the importance of preoperative smoking cessation to reduce post-operative morbidity.

Similar Rates of Symptomatic Marginal Ulcers After One-Anastomosis-Gastric Bypass Compared to Roux-en-Y Gastric Bypass

PURPOSE

One-anastomosis-gastric-bypass (OAGB) has become a common bariatric procedure worldwide. Marginal ulcers (MU) are a significant non-immediate complication of gastric bypass surgeries. There seems to be concern among surgeons that MU are more common after OAGB compared with Roux-en-Y gastric bypass (RYGB) due to the constant and extensive exposure of the anastomosis to bile. The aim of this study was to compare the incidence, presentation, and management of MU between the two surgeries.

MATERIALS AND METHODS

A retrospective study of prospectively collected data was performed to include all consecutive patients between 2010 and 2020, who underwent elective OAGB or RYGB at our institution. Patients diagnosed with symptomatic MU were identified. Factors associated with this complication were assessed and compared between the two surgeries.

RESULTS

Symptomatic MU were identified in 23/372 OAGB patients (6.2%) and 35/491 RYGB patients (7.1%) (p = 0.58). Time to ulcer diagnosis was shorter in OAGB patients (12 ± 11 vs. 22 ± 17 months, p < 0.01). Epigastric pain was the common symptom (78% OAGB vs. 88.5% RYGB, p = 0.7) and approximately 15% of ulcers presented with perforation upon admission (17% vs.11.4%, p = 0.7). Re-operation was required in 5/23 OAGB (21.7%) and 6/36 RYGB (17%) patients (p = 0.11) while the rest of the patients were managed non-operatively.

CONCLUSIONS

The risk of developing a marginal ulcer is similar between patients who underwent OAGB and RYGB. Patients diagnosed with MU following OAGB tend to present earlier; however, the clinical presentation is similar to RYGB patients. The management of this serious complication seems to be associated with acceptable outcomes with comparable operative and non-operative approaches.

Challenges of Revisional Metabolic and Bariatric Surgery: A Comprehensive Guide to Unraveling the Complexities and Solutions of Revisional Bariatric Procedures

Revisional metabolic and bariatric surgery (RMBS) presents unique challenges in addressing weight loss failure or complications arising from initial bariatric procedures. This review aims to explore the complexities and solutions associated with revisional bariatric procedures comprehensively, offering insights into the evolving terrain of metabolic and bariatric surgery. A literature review is conducted to identify pertinent studies and expert opinions regarding RMBS. Methodological approaches, patient selection criteria, surgical techniques, preoperative assessments, and postoperative management strategies are synthesized to provide a comprehensive overview of current practices and advancements in the field, including institutional protocols. This review synthesizes key findings regarding the challenges encountered in RMBS, including the underlying causes of primary procedure failure, anatomical complexities, technical considerations, and assessments of surgical outcomes. Additionally, patient outcomes, complication rates, and long-term success are presented, along with institutional approaches to patient assessment and procedure selection. This review provides valuable insights for clinicians grappling with the complexities of RMBS. A comprehensive understanding of patient selection, surgical techniques, preoperative management, and postoperative care is crucial for enhancing outcomes and ensuring patient satisfaction in the field of metabolic bariatric surgery.

Updates in Bariatric Surgery

Bariatric surgery is currently the most effective long-term treatment for morbid obesity as well as type-2 diabetes mellitus. The field of metabolic and bariatric surgery has seen tremendous growth over the past decade with dramatically reduced risks. This article aims to provide an update on bariatric surgery, highlighting the latest outcomes, improvements, and challenges in the field. Recently, the American Society of Metabolic and Bariatric Surgery (ASMBS) and the International Federation for the Surgery of Obesity and Metabolic Disorders (IFSO) released a major update to the indications for bariatric surgery at BMI ≥35 kg/m2 regardless of co-morbidities and 30-34.9 kg/m2 with obesity-related comorbidities. Sleeve gastrectomy has emerged as the most popular bariatric procedure in the last 10 years with its remarkable efficacy and safety profile. The implementation of the Metabolic and Bariatric Surgery Accreditation and Quality Improvement Program (MBSAQIP) and Enhanced Recovery After Surgery (ERAS) protocols have significantly improved the quality of care for all bariatric patients. The recent introduction and FDA approval of Glucagon-Like Peptide-1 (GLP-1) agonists for chronic obesity has garnered significant media coverage and popularity, but no guidelines exist regarding its use in relation to bariatric surgery. This update underscores the need for tailored approaches, ongoing research, and the integration of evidence-based medicine and innovations to enhance patient care.

Marginal Ulcer Incidence and the Population of Gastrin Producing G cells Retained in the Gastric Pouch after Roux-en-Y Gastric Bypass: Is There a Relationship?

INTRODUCTION

Marginal ulcers are the most prevalent endoscopic abnormality after RYGB. The etiology is still poorly understood; however, an increase in acid secretion has been strongly implicated as a causal agent. Although gastrin is the greatest stimulant of acid secretion, to date, the presence of gastrin producing G cells retained in the gastric pouch, related to the occurrence of marginal ulcers, has not been evaluated.

OBJECTIVE

Evaluate the density of G cells and parietal cells in the gastric pouch of RYGB patients with a diagnosis of marginal ulcer on the post-op EGD.

METHOD

We retrospectively evaluated 1104 gastric bypasses performed between 2010 and 2020. Patients with marginal ulcer who met the inclusion criteria and controls were selected from this same population. Endoscopic gastric pouch biopsies were evaluated using immunohistochemical study and HE staining to assess G cell and parietal cell density.

RESULTS

In total, 572 (51.8%) of the patients performed endoscopic follow-up after RYGB. The incidence of marginal ulcer was 23/572 (4%), and 3 patients required revision surgery due to a recalcitrant ulcer. The mean time for ulcer identification was 24.3 months (2-62). G cell count per high-power field (× 400) was statistically higher in the ulcer group (p < 0.05). There was no statistical difference in parietal cell density between groups (p 0.251).

CONCLUSION

Patients with a marginal ulcer after gastric bypass present a higher density of gastrin-producing G cells retained in the gastric pouch.

The Trajectory of Revisional Bariatric Surgery: Open to Laparoscopic to Robotic

Metabolic and bariatric surgery (MBS) is the most effective therapeutic intervention for patients with obesity, with sleeve gastrectomy (SG) being the most commonly performed primary MBS procedure. Long-term studies have demonstrated that 15-20% of patients require revisional bariatric surgery (RBS) due to weight-related issues or surgical complications. Despite the gold standard being laparoscopic revision, there are other available approaches such as open or robotic-assisted. An extensive literature review was performed for articles from their inception to February 2024. A descriptive review of MBS procedures (SG, Roux-en-Y gastric bypass (RYGB), single anastomosis duodeno-ileostomy (SADI) and biliopancreatic diversion-duodenal switch (BPD-DS)) was carried out to report and compare outcomes between primary and revisional bariatric surgery. A similar review was conducted to compare outcomes of revisional approaches (open, laparoscopic, robotic). RYGB remains the dominant RBS with a similar safety profile compared to revisional SADI and BPD-DS. In terms of the RBS surgical approach, all three options showed comparable short and long-term outcomes, with robotic RBS being associated with longer operative time and variable length of stay. Additional long-term studies are required to further validate our conclusions.

Analysis of the efficacy of sleeve gastrectomy, one-anastomosis gastric bypass, and single-anastomosis sleeve ileal bypass in the treatment of metabolic syndrome

The objective of this study was to evaluate and compare the effectiveness of three different types of bariatric surgeries, namely, sleeve gastrectomy (SG), one-anastomotic gastric bypass (OAGB), and single anastomosis sleeve ileal (SASI) bypass, in the treatment of metabolic syndrome (MS). The optimal approach for managing MS remains uncertain, and thus this study aimed to provide a recent analysis of the efficacy of these surgical procedures. This retrospective study evaluated data of individuals who underwent SG, OAGB, and SASI bypass. The primary outcome measures included weight, body mass index (BMI), glucolipid metabolic index, and the occurrence of treatment-related complications within 6 to 12 months post-surgery. A total of 324 patients were included in this study. Of these, 264 patients underwent SG, 30 underwent OAGB, and 30 underwent SASI bypass. A significant decrease in weight was observed at the 6-month and 12-month marks following all three surgical procedures. Of these, patients who underwent SASI bypass exhibited the greatest reduction in weight and BMI post-surgery. Furthermore, the SASI bypass was associated with a significantly higher percentage of total weight loss (%TWL) and excess body mass index loss (%EBMIL) compared to SG and OAGB. Patients who underwent OAGB and SASI bypass demonstrated notable improvements in type 2 diabetes mellitus (T2DM). Patients who underwent SASI bypass and OAGB experienced greater postoperative comfort and reported fewer complaints of discomfort compared to the other procedure. Based on the retrospective analysis of the data, SASI bypass was associated with greater reductions in weight and BMI, higher percentages of %TWL and %EBMIL, and better improvement in T2DM compared to SG and OAGB. Therefore, both SASI bypass and OAGB were found to be more effective than SG in the treatment of MS.

Nonsurgical risk factors for marginal ulcer following Roux-en-Y gastric bypass for obesity: a systematic review and meta-analysis of 14 cohort studies

BACKGROUNDS

Marginal ulcer (MU) is a common complication of Roux-en-Y Gastric Bypass (RYGB). The primary goal of this meta-analysis was to identify potential risk factors for MU post-RYGB.

METHODS

A comprehensive literature search was conducted on four databases (PubMed, Embase, Web of Science, and the Cochrane Library) to identify articles published from inception to 23 May 2023 that reported risk factors linked to ulcer occurrence post-RYGB. Hazard Ratio (HR) and Odds Ratio (OR) with respective 95% CI were calculated to estimate the impact of selected risk factors on MU. The risk factors were evaluated through multivariate analyses. The estimated risk factors were subjected to a random-effects model. Subgroup analysis based on study baseline characteristics and leave-one-out sensitivity analysis were also performed to investigate the potential sources of heterogeneity and assess the robustness of the findings.

RESULT

Herein, 14 observational studies involving 77 250 patients were included. Diabetes, smoking, and steroid use were identified to be risk factors of MU, with pooled ORs of (1.812; 95% CI: 1.226-2.676; P =0.003), (3.491; 95% CI: 2.204-5.531; P< 0.001), and (2.804; 95% CI: 1.383-5.685; P =0.004), respectively. Other risk factors, such as alcohol consumption, male sex, and PPI use, were deemed not significant due to differences in data acquisition and effect estimates.

CONCLUSION

Diabetes, smoking, and steroid use were identified as independent risk factors of MU. Enhancing awareness of these identified risk factors will lead to more effective preoperative prevention and targeted postoperative interventions for patients undergoing RYGB.

Experience of Robotic Complex Revisional Bariatric Surgery in a High-Volume Center

PURPOSE

A revisional bariatric surgery (RBS) is necessary in about 28% of the patients. The role of robotic surgery in RBS is still a subject of debate. We aim to report the outcomes of robotic-assisted RBS at our institution.

MATERIALS AND METHODS

We identified patients who underwent robotic-assisted RBSs between January 1, 2016, and May 31, 2022. We analyzed patient demographics and indications for surgery. Measured outcomes included peri- and postoperative morbidity, comorbidity management, and weight loss outcomes.

RESULTS

A total of 106 patients were included. Primary procedures were adjustable gastric band 44 (41.5%), sleeve gastrectomy 42 (39.6%), Roux-en-Y gastric bypass (RYGB) 18 (17%), duodenal switch (DS) 1 (0.9%), and vertical banded gastroplasty 1 (0.9%). RBSs performed included 85 (78.7%) RYGB, 16 (14.8%) redo-gastrojejunostomy, and 5 (4.6%) DS. The median time to revision was 8 (range 1-36) years, and the main indication was insufficient weight loss (49%). Median length of hospital stay was 2 (range 1-16) days, and 9 (8.5%) patients were readmitted during the first 30 days. Only 4 (3.7%) patients had early Clavien-Dindo grade III or higher adverse events. No anastomotic leaks were documented. Median excess weight loss was 35.1%, 42.23%, and 45.82% at the 6-, 12-, and 24-month follow-up. Of 57 patients with hypertension, 29 (50.9%) reduced their medication dosage, and 20/27 (74.1%) reduced their diabetes mellitus medication dosage. Finally, of the 75 patients with symptoms, 64 (85.3%) reported an improvement after the RBS.

CONCLUSION

Robotic-assisted RBS is feasible, significantly improves patients' comorbidities and symptoms, and leads to considerable weight loss.

Rates of Recurrent Marginal Ulcer in Gastric Bypass Patients Undergoing Revisional Surgery

INTRODUCTION

The rate of marginal ulcer (MU) following primary Roux-en-Y Gastric Bypass (RYGB) is approximately .6-16%. Few studies have evaluated recurrence rates following surgical revision for MU. The primary aim of this study was to determine the rate of MU recurrence following revision. The secondary aim was to evaluate the impact of truncal vagotomy (TV) on the recurrence rates and analyze potential risk factors associated with the recurrence of MU after revision.

METHODS

We conducted a retrospective cohort study examining data at a single tertiary academic medical center. Adult patients with a history of RYGB who underwent gastrojejunostomy revision for recurrent MU between the years of 2003-2020 were included. We sought to determine our overall rate of MU following revision, with and without TV. Additionally, we examined the association of risk factors with MU recurrence. Fisher's exact test was used to determine the statistical significance of recurrence rates between the groups.

RESULTS

We included 90 patients in the study. The overall recurrence rate for MU was 16.7%. Of the 90 patients, 35 (35.4%) patients underwent TV at the time of revision. The recurrence rate of MU after GJ revision with TV was 14.3% in comparison to those without TV, 18.2% (P = .775). Smoking, steroid, alcohol use, history of cardiac surgery/intervention, and helicobacter pylori were not significantly associated with recurrent MU following revision.

CONCLUSIONS

The rate of recurrence after revision for MU is high. Adding TV trended towards decreased MU recurrence after revisional surgery, however not significant. Larger studies are needed to evaluate risk factors associated with recurrent MU after revision.

Marginal Ulcers after Roux-en-Y Gastric Bypass: Etiology, Diagnosis, and Management

Marginal ulcer (MU) is a potential complication following Roux-en-Y gastric bypass (RYGB), with a mean prevalence of 4.6%. Early identification and prompt intervention are crucial to mitigating further complications. The pathophysiology of MU is complex and involves multiple factors, including smoking, Helicobacter pylori infection, non-steroidal anti-inflammatory drug (NSAID) use, and larger pouch size. Patients with MU may experience acute or chronic abdominal pain. Rarely, they may present with a complication from the ulceration, such as bleeding, perforation, or strictures. Following diagnosis by endoscopy, management of MU typically involves modification of risk factors and medical therapy focused on proton pump inhibitors. In case of complicated ulcers, surgical intervention is often required for the repair of the perforation or resection of the stricture. For recurrent or recalcitrant ulcers, endoscopic coverage of the ulcer bed, resection of the anastomosis, and abdominal or thoracoscopic truncal vagotomy may be considered. This review aims at providing an overview of the etiology, diagnosis, and management of MU after RYGB.

Perforated marginal ulcer following Whipple procedure: A case report

Marginal ulcers are rare complications of pancreatoduodenectomy. Patient can present with varying symptoms such as epigastric discomfort, pain, dysphagia, or can present in emergency department with complications like bleeding and perforation.

Management of a refractory marginal ulcer following Roux-en-Y gastric bypass with EUS-guided Roux-en-Y gastric bypass reversal

Video 1EUS-guided Roux-en-Y gastric bypass reversal procedure to treat a refractory marginal ulcer following Roux-en-Y gastric bypass.

Surgical Management of Failed Roux-en-Y Gastric Bypass (RYGB) Reversal: A Case Study

With the growing obesity epidemic, surgeons are performing more bariatric surgeries, including Roux-en-Y gastric bypass (RYGB) reversals. Although studies have identified indications for RYGB reversals, little information is available about the long-term effects of the procedure. We wish to highlight a case with long-term complications of RYGB reversal and subsequent management. We present a patient with multiple abdominal surgeries including an RYGB reversal that was complicated by a stenosed gastrogastric anastomosis that caused several gastrojejunostomy ulcerations and malnutrition secondary to intractable nausea and vomiting. A 51-year-old female with a complex surgical history including a simple RYGB reversal in 2019 presented to the ER with complaints of abdominal pain, uncontrolled diarrhea, and an inability to tolerate food for six months. Workup revealed multiple marginal ulcers at the remnant jejunum attached to the gastric pouch, and a stenosed gastrogastrostomy placed high along the cardia of the remnant stomach and pouch. This stenosis resulted in a nonfunctional, nondependent reversal that only drained when filled. Ultimately, a large gastrotomy was performed, and an endoscope was utilized to identify a small pinhole connection between the patient's pouch and the remnant stomach along the superomedial portion of the remnant stomach's fundus. The anvil of a 60 mm GIA black load stapler was guided through and fired twice to come across the stricture. After the stricture was completely crossed, the endoscope was passed through, confirming that it was widely patent. The postoperative course was uneventful, and the patient was discharged with total parenteral nutrition (TPN) on postoperative day 15 before being discontinued at her follow-up visit. She reported that she had been gaining weight and eating well. Long-term complications following RYGB reversal are not well-discussed in the literature. This case offers insight into such complications, discusses the surgical technique utilized to fix them, and calls for further research on the topic to better inform surgeons and patients alike.

Predictors of marginal ulcer after gastric bypass: a systematic review and meta-analysis

INTRODUCTION

Marginal ulcer (MU) is a common complication following Roux-en-Y gastric bypass (RYGB) with an incidence rate of up to 25%. Several studies have evaluated different risk factors associated with MU with inconsistent findings. In this meta-analysis, we aimed to identify the predictors of MU after RYGB.

METHODS

A comprehensive literature search of PubMed, Embase, and Web of Science databases was conducted through April 2022. All studies that used a multivariate model to assess risk factors for MU after RYGB were included. Pooled odds ratios (OR) with 95% confidence intervals (CI) for risk factors reported in ≥ 3 studies were obtained within a random-effects model.

RESULTS

Fourteen studies with 344,829 patients who underwent RYGB were included. Eleven different risk factors were analyzed. Meta-analysis demonstrated that Helicobacter pylori (HP) infection (OR 4.97 [2.24-10.99]), smoking (OR 2.50 [1.76-3.54]), and diabetes mellitus (OR 1.80 [1.15-2.80]), were significant predictors of MU. Increased age, body mass index, female gender, obstructive sleep apnea, hypertension, and alcohol use were not predictors of MU. There was a trend of an increased risk of MU associated with nonsteroidal anti-inflammatory drugs (OR 2.43 [0.72-8.21]) and a lower risk of MU with proton pump inhibitors use (OR 0.44 [0.11-2.11]).

CONCLUSIONS

Smoking cessation, optimizing glycemic control, and eradication of HP infection reduce the risk of MU following RYGB. Recognition of predictors of MU after RYGB will allow physicians to identify high-risk patients, improve surgical outcomes, and reduce the risk of MU.

Endoscopic and histopathological assessment of individuals undergoing one anastomosis gastric bypass: a 2-year follow-up

BACKGROUND

There is much debate over the occurrence of biliary reflux to the gastric pouch after one anastomosis gastric bypass (OAGB) and its potential risks.

OBJECTIVE

To assess endoscopic and histopathological findings following a standardized protocol of biopsy collection two years after OAGB.

METHODS

A historical cohort study was conducted, based on a prospectively collected database, which involved 39 participants who underwent OAGB. Participants underwent clinical evaluation and esophagogastroduodenoscopy at the time of surgery and 24 months afterward. Post-operatively, biopsy specimens in esophagogastric junction, pouch, and anastomosis were systematically collected.

RESULTS

92.3% of the participants were female and the mean age was 37 ± 8.5 years. The mean body mass index (BMI) significantly decreased from 37.6 ± 5.7 kg/m² to 27 ± 4.1 kg/m² after 2 years (p < 0.001). The mean %TWL was 27.2 ± 10.5%. The prevalence of non-erosive gastritis significantly increased from 25.6 to 51.3% (p = 0.02). Erosive gastritis significantly decreased from 28.2 to 10.3% (p = 0.04). Four cases of marginal ulcers were identified (10.3%). The commonest histopathological finding was mild inflammation in 74.3% (esophagogastric junction), 58.9% (pouch), and 71.8% (anastomosis). There was one case of focal intestinal metaplasia in each site of interest and no cases of dysplasia or severe inflammation.

CONCLUSIONS

Using a standardized protocol of post-operative biopsy collection, low rates of severe endoscopic and histopathological abnormalities were observed two years after OAGB. Nevertheless, as most patients have histologically proven inflammation, bile in the gastric pouch, and endoscopic gastritis, long-term surveillance is essential because of the uncertain risk of these abnormalities.

Marginal ulcers and associated risk factors after Roux-en-Y gastric bypass

As the prevalence of morbid obesity continues to climb in America, so does the popularity of the Roux-en-Y gastric bypass (RYGB) to achieve weight loss goals; however, a long-term risk of RYGB is marginal ulceration, which requires urgent surgery if perforated. We sought to identify characteristics associated with elective vs urgent presentation for marginal ulcer following RYGB. Retrospective data for consecutive cases with marginal ulcers that required surgical intervention from May 2016 to February 2021 were queried from our institution's bariatric database, and differences in patient characteristics and clinical course were assessed according to presentation. Forty-three patients underwent surgery for marginal ulcer during the study timeframe. Twenty-four (56%) patients presented electively and were treated with resection of the gastroenterostomy and reanastomosis; the remaining 19 (44%) presented urgently with perforation and were treated with omental patch repair. Demographics, comorbidities, and medications were similar between groups. Patients with urgent presentations were less likely to have bleeds (0% vs. 33%, P = 0.0056) and strictures (16% vs. 46%, P = 0.0368), but were more likely to require admission to the intensive care unit (32% vs. 4%, P = 0.0325) and have a longer median length of stay (2 vs. 5 days, P < 0.0001). Bariatric surgeons must properly counsel patients about the risk of marginal ulcer development to prevent dangerous perforation, intensive care unit stays, and long hospitalizations.

Management strategies of anastomotic ulcer after gastric bypass and risk factors of recurrence

BACKGROUND

Marginal ulcers (MU) after gastric bypass are a challenging problem. The first-line treatment is a medical therapy with eviction of risk factors but is sometimes insufficient. The management strategies of intractable ulcers are still not clearly defined. The aim of our study was to analyse the risk factors for recurrence, the management strategies used and their efficiencies.

METHODS

Based on a retrospective analysis of all MU managed in our tertiary care centre of bariatric surgery during the last 14 years, a descriptive analysis of the cohort, the management strategies and their efficiency were analysed. A logistic regression was done to identify the independent associated risk factors of intractable ulcer.

RESULTS

Fifty-six patients matched inclusion criteria: 30 were referred to us (13 Roux-en-Y Gastric Bypass-RYGB and 17 One Anastomosis Gastric Bypass-OAGB), 26 were operated on in our institution (24 RYGB and 2 OAGB). 11 patients had a complicated inaugural MU requiring an interventional procedure in emergency: 7 perforations, 4 haemorrhages. The majority of MU were treated medically as a first-line therapy (n = 45; 80.4%). 32 MU recurred: 20 patients required surgery as a 2nd line therapy, 6 were operated on as a 3rd line therapy and 1 had a surgery as a 5th line therapy. The OAGB was the only risk factor of recurrence (p = 0.018). We found that the Surgical management was significantly more frequent for patients with a OAGB (84% versus 35% for RYGB, p = 0.001); the most performed surgical procedure was a conversion of OAGB to RYGB (n = 11, 37.9%).

CONCLUSION

Surgery was required for a large number of MU especially in case of recurrence, but recurrence can still occur after the surgery. The OAGB was the only risk factor of recurrence identified and conversion to RYGB seemed to be effective for the healing.

Operative management of acute abdomen after bariatric surgery in the emergency setting: the OBA guidelines

BACKGROUND

Patients presenting with acute abdominal pain that occurs after months or years following bariatric surgery may present for assessment and management in the local emergency units. Due to the large variety of surgical bariatric techniques, emergency surgeons have to be aware of the main functional outcomes and long-term surgical complications following the most performed bariatric surgical procedures. The purpose of these evidence-based guidelines is to present a consensus position from members of the WSES in collaboration with IFSO bariatric experienced surgeons, on the management of acute abdomen after bariatric surgery focusing on long-term complications in patients who have undergone laparoscopic sleeve gastrectomy and laparoscopic Roux-en-Y gastric bypass.

METHOD

A working group of experienced general, acute care, and bariatric surgeons was created to carry out a systematic review of the literature following the Preferred Reporting Items for Systematic Review and Meta-analysis Protocols (PRISMA-P) and to answer the PICO questions formulated after the Operative management in bariatric acute abdomen survey. The literature search was limited to late/long-term complications following laparoscopic sleeve gastrectomy and laparoscopic Roux-en-Y gastric bypass.

CONCLUSIONS

The acute abdomen after bariatric surgery is a common cause of admission in emergency departments. Knowledge of the most common late/long-term complications (> 4 weeks after surgical procedure) following sleeve gastrectomy and Roux-en-Y gastric bypass and their anatomy leads to a focused management in the emergency setting with good outcomes and decreased morbidity and mortality rates. A close collaboration between emergency surgeons, radiologists, endoscopists, and anesthesiologists is mandatory in the management of this group of patients in the emergency setting.

Aspirin Use as a Risk Factor for Marginal Ulceration in Roux-en-Y Gastric Bypass Patients: A Meta-Analysis of 24,770 Patients

BACKGROUND

Roux-en-Y gastric bypass (RYGB) is a recognized, safe bariatric procedure with minimal complications. Marginal ulceration, however, remains a challenging problem with an incidence of 8-12%. While chronic NSAID use is an established risk factor for ulcer formation, aspirin use itself as a cause for marginal ulceration is still unclear. We aim to compare the rates of marginal ulceration in RYGB with and without aspirin use.

METHODS

PubMed, ScienceDirect, Cochrane, Web of Science, and Google Scholar were searched for articles between 2008 and 2021 by two independent reviewers using the Preferred Reporting Items for Systematic Reviews and Meta-analysis (PRISMA). The risk of bias was assessed using Newcastle-Ottawa Scale. Meta-analysis was conducted using a fixed-effect model.

RESULTS

From 5324 studies screened, we included 3 studies. Two studies had a low risk of bias, and the other one presented a high risk of bias on the Newcastle-Ottawa Scale. We included 24,770 patients, 1911 with aspirin use and 22,859 without aspirin use. After the meta-analysis, patients who used aspirin had a significantly higher marginal ulceration rate than those who did not (OR = 1.33 [95% CI 1.08 to 1.63], P < .002; I² = 39%).

CONCLUSIONS

Aspirin use is associated with increased rates of marginal ulceration after RYGB.

Postoperative 4-Year Outcomes in Septuagenarians Following Bariatric Surgery

BACKGROUND

Bariatric surgery is the most effective treatment for obesity; however, its utilization in older patients remains low. There is a dearth of literature on long-term effectiveness and safety of bariatric surgery in septuagenarian patients. The aim of this study was to compare the short- and long-term outcomes of bariatric surgery in this population.

METHODS

Patients who underwent primary laparoscopic Roux-en-Y gastric bypass (LRYGB) or laparoscopic sleeve gastrectomy (LSG) at our institution between 2011 and 2015 were included. Patients were divided into two age groups: < 70 and ≥ 70 years. Outcomes included postoperative hospital length of stay (LOS), 30-day complications, up to 4-year complications, 90-day mortality, comorbidity resolution, and 4-year weight loss (BMI change-ΔΒΜΙ). The groups were also compared using multivariable analyses adjusting for potential confounders (gender, preoperative BMI, and type of procedure).

RESULTS

Twenty-nine septuagenarians who underwent 21 LRYGB (72.4%) and 8 LSG (27.6%) were compared to 1016 patients aged < 70 years operated on during the same time period. Additionally, following the multivariable analyses, the septuagenarians had higher LOS (3 vs 2.3 days, p = 0.01), 4-year complications (38% vs 23%, p = 0.012), and less comorbidities' resolution but similar 4-year ΔBMI (- 8.6 vs - 10, p = 0.421), and 30-day complications (10% vs 6%, p = 0.316).

CONCLUSION

Bariatric surgery in carefully selected septuagenarians can be accomplished with acceptable safety and comparable postoperative weight loss at 4 years. Surgeons may consider broadening their selection criteria to include this patient subgroup but may allow the patients to reap its benefits if offered earlier in life.

Operative management of recalcitrant marginal ulcers following laparoscopic Roux-en-Y gastric bypass for morbid obesity: a systematic review

One of the short- and long-term complications following Roux-en-Y gastric bypass (RYGB) for morbid obesity is the development of marginal ulcers (MUs). Although chronic and recalcitrant/recurrent marginal ulcers (rMUs) are common, there is no consensus on their optimal management. The objective of this study was to perform a systematic review of the elective operative management of rMUs. A systematic search of the literature was conducted. Relevant databases were searched up to May 16, 2020. Articles were included if they met the following inclusion criteria: (1) bariatric patients were included as the study population, (2) laparoscopic RYGB was performed as the index operation, (3) study patients developed rMUs, and (4) MUs required elective operative (surgical, endoscopic) interventions. Quality of articles was assessed using the Grading of Recommendations Assessment, Development, and Evaluation (GRADE) system. The search identified 3470 citations; of these, 16 observational studies were included. Elective management of rMUs consisted of endoscopic (oversewing ± stents) and surgical interventions (gastrojejunostomy revision, vagotomy, conversion to sleeve gastrectomy, subtotal/total gastrectomy, reversal to normal anatomy). Quality of the studies as assessed by the GRADE system was low to very low. Recalcitrant/recurrent MUs are challenging complications both for bariatric patients and for their treating surgeons. There are no established algorithms for the management of rMUs, and the currently available evidence in the literature is limited both in quantity and in quality. Future multicentre, multisurgeon, randomized, controlled trials are needed to address this issue.

Intersection of smoking, e-cigarette use, obesity, and metabolic and bariatric surgery: a systematic review of the current state of evidence

BACKGROUND

Millions of Americans qualify for metabolic and bariatric surgery (MBS) based on the proportion of the population with severe obesity. Simultaneously, the use of electronic nicotine/non-nicotine delivery systems (ENDS) has become epidemic.

OBJECTIVE

We conducted a timely systematic review to examine the impact of tobacco and ENDS use on post-operative health outcomes among MBS patients.

METHODS

PRISMA guidelines were used as the search framework. Keyword combinations of either "smoking," "tobacco," "e-cigarette," "vaping," or "ENDS" and "bariatric surgery," "RYGB," or "sleeve gastrectomy" were used as search terms in PUBMED, Science Direct, and EMBASE. Studies published in English between January 1990 and June 2020 were screened.

RESULTS

From the 3251 articles found, a total of 48 articles were included in the review. No articles described a relationship between ENDS and post-operative health outcomes in MBS patients. Seven studies reported smokers had greater post-MBS weight loss, six studies suggested no relationship between smoking and post-MBS weight loss, and one study reported smoking cessation pre-MBS was related to post-MBS weight gain. Perioperative use of tobacco is positively associated with several post-surgery complications and mortality in MBS patients.

CONCLUSIONS

Combustible tobacco use among MBS patients is significantly related to higher mortality risk and complication rates, but not weight loss. No data currently is available on the impact of ENDS use in these patients. With ENDS use at epidemic levels, it is imperative to determine any potential health effects among patients with severe obesity, and who complete MBS.

Factors influencing the choice between laparoscopic sleeve gastrectomy and Roux-en-Y gastric bypass

BACKGROUND

While laparoscopic sleeve gastrectomy (LSG) continues to be the most commonly performed bariatric operation, several variables influence surgeons' practice patterns and patients' decision-making in the type of bariatric procedure to perform. The aim of this study was to evaluate patient factors that influence the decision between laparoscopic Roux-en-Y gastric bypass (LRYGB) versus LSG.

METHODS

The Metabolic and Bariatric Surgery Accreditation and Quality Improvement Program (MBSAQIP) database was queried for patients undergoing LSG and LRYGB between 2015 and 2017. Univariate analysis and multivariate logistic regression were used to evaluate factors associated with performing LRYGB compared to LSG.

RESULTS

A total of 252,117 (72.3%) LSG and 96,677 (27.7%) LRYGB cases were identified. Patients undergoing LSG were younger (44.3 ± 12.0 vs 45.2 ± 11.8 years; p < 0.01) and had a lower body mass index (BMI; 45.1 ± 7.8 vs 46.2 ± 8.1 kg/m²; p < 0.01). Most of the patients were females (79.4%), white (73.0%), with an American Society of Anesthesiology (ASA) class ≤ 3 (96.4%). The factors associated with undergoing LRYGB compared to LSG were diabetes mellitus, gastroesophageal reflux disease, BMI ≥ 50 kg/m², ASA class > 3, obstructive sleep apnea, hypertension, and hyperlipidemia. However, patients with kidney disease, black race, chronic steroid use, age ≥ 60 years, recent smoking history, chronic obstructive pulmonary disease, and coronary artery disease were more likely to undergo LSG.

CONCLUSIONS

The decision to perform LRYGB is primarily driven by obesity-associated comorbidities and higher BMI, whereas LSG is more likely to be performed in higher risk patients.