Clinical Scorecard: Efficacy and Safety of Single Anastomosis Sleeve Ileal Bypass for Obesity and Related Comorbidities: A Systematic Review and Meta-Analysis

At a Glance

Key Highlights

• SASI bypass is a newer bariatric technique first described in 2014, combining sleeve gastrectomy with a loop gastroileostomy 200-350 cm proximal to the ileocecal valve.
• Systematic review included 18 studies (retrospective, prospective, and one RCT) assessing SASI bypass efficacy and safety compared to other bariatric surgeries like SG and OAGB.
• Meta-analysis evaluated outcomes including percentage excess weight loss (%EWL), remission/improvement of T2DM, hypertension, dyslipidemia, OSA, and surgical complications.

Guideline-Based Recommendations

Diagnosis

• Assess adult patients with obesity and related comorbidities as candidates for bariatric surgery including SASI bypass.

Management

• Consider SASI bypass as a surgical option for obesity treatment, especially when simpler and potentially safer alternatives to Roux-en-Y gastric bypass are desired.
• Customize common limb length between 200 and 350 cm based on patient characteristics and surgical preference.

Monitoring & Follow-up

• Monitor weight loss outcomes using %EWL and BMI changes postoperatively.
• Evaluate improvement or remission of obesity-related comorbidities such as T2DM, hypertension, dyslipidemia, GERD, and OSA.
• Track and manage postoperative complications systematically.

Risks

• Recognize potential surgical complications inherent to bariatric procedures; SASI bypass may have a safety profile comparable or improved relative to other techniques.
• Consider heterogeneity in outcomes due to variation in surgical technique and limb length.

Patient & Prescribing Data

Adults with obesity undergoing bariatric surgery

SASI bypass shows promising efficacy in weight loss and comorbidity improvement with a simpler surgical approach; however, data are derived from observational studies and limited RCT evidence.

Clinical Best Practices

• Use standardized protocols for patient selection and preoperative evaluation for SASI bypass.
• Apply consistent surgical technique with attention to common limb length to optimize outcomes.
• Implement rigorous postoperative follow-up to assess weight loss, comorbidity resolution, and detect complications early.
• Utilize multidisciplinary teams including surgeons, endocrinologists, and dietitians for comprehensive care.

References

• Mui et al. 2014 description of SASI bypass
• Mahdy et al. 2016 first case series of SASI bypass
• PRISMA guidelines for systematic reviews
• Cochrane Handbook for Systematic Reviews