Clinical Scorecard: Comparative Outcomes of Revisional Roux-en-Y Gastric Bypass and One-Anastomosis Gastric Bypass Following Failed Sleeve Gastrectomy: A Randomized Controlled Study

At a Glance

Key Highlights

• LSG is the most frequently performed bariatric procedure but has variable rates of weight regain leading to revision surgery.
• RYGB is the most common revisional procedure after LSG; OAGB is less common but gaining popularity with comparable or superior outcomes.
• This randomized controlled trial compares RYGB and OAGB revisions over 2 years focusing on weight loss, complications, nutritional status, and resolution of comorbidities.

Guideline-Based Recommendations

Diagnosis

• Define weight regain as any increase above nadir weight or BMI exceeding 35 after LSG.
• Exclude patients with grade B or higher GERD per Los Angeles classification via preoperative endoscopy.
• Perform routine preoperative gastroscopy, imaging (MDCT virtual gastroscopy), and laboratory nutritional assessments.

Management

• Perform revisional RYGB or OAGB laparoscopically by experienced bariatric surgeons.
• Administer venous thrombosis prophylaxis starting 12 hours preoperatively and continuing for 21 days postoperatively.
• Prescribe multivitamins, calcium, and iron supplements postoperatively.
• Utilize a multidisciplinary team including bariatric surgeon, dietician, internist, and psychiatrist for comprehensive perioperative care.

Monitoring & Follow-up

• Monitor weight loss via BMI and % excess BMI loss at 6 months, 1 year, and 2 years post-revision.
• Assess for early and late complications clinically and with imaging as indicated.
• Evaluate reflux symptoms and perform endoscopy if persistent gastrointestinal symptoms occur postoperatively.
• Conduct nutritional laboratory tests routinely during follow-up.

Risks

• Potential for postoperative complications including reflux symptoms, nutritional deficiencies, and surgical risks inherent to revisional bariatric procedures.
• Risk of venous thromboembolism mitigated by prophylaxis.
• Possible need for additional interventions if complications or inadequate weight loss occur.

Patient & Prescribing Data

Adults with weight regain after primary LSG undergoing revisional bariatric surgery

Both RYGB and OAGB are viable revisional options with comparable safety and efficacy profiles; multidisciplinary support and supplementation are essential for optimal outcomes.

Clinical Best Practices

• Careful patient selection excluding those with significant GERD (grade B or higher) prior to revision.
• Comprehensive preoperative evaluation including endoscopy, imaging, and nutritional assessment.
• Use of standardized surgical techniques performed by experienced bariatric surgeons.
• Implementation of multidisciplinary team approach for perioperative and postoperative management.
• Routine thromboprophylaxis and nutritional supplementation post-surgery.
• Close follow-up with clinical, nutritional, and endoscopic monitoring to detect and manage complications early.

References

• Los Angeles Classification of GERD
• CONSORT Checklist for Randomized Trials