SASI Bypass
A newer metabolic surgery combining sleeve gastrectomy with intestinal bypass for significant and sustained weight loss.
Plain English
Patient-Friendly Explanation
SASI Bypass is a weight-loss surgery that combines two approaches: first, the stomach is made smaller (like a sleeve gastrectomy), and then a connection is created between the stomach and the lower part of the small intestine. This helps you feel full with less food and reduces calorie absorption, leading to substantial weight loss.
Medical
Clinical Definition
The Single Anastomosis Sleeve Ileal (SASI) Bypass is a novel metabolic bariatric procedure that pairs a standard sleeve gastrectomy with a side-to-side gastroileal anastomosis approximately 250–300 cm from the ileocaecal valve. This creates both restrictive and malabsorptive components without the need for a Roux limb or a second anastomosis. Emerging evidence suggests SASI achieves comparable weight loss to Roux-en-Y gastric bypass with a potentially lower complication rate and shorter operative time.
Key Insight
Why It Matters
For patients with severe obesity or metabolic conditions like type 2 diabetes who do not achieve adequate results with sleeve gastrectomy alone, SASI Bypass offers an additional surgical option. Dr. Joseph Wang can help you understand whether you are a candidate and guide you through the evaluation process at Accord Medical.
Sources
Reviewed against standard medical references.
Medically reviewed by
Family Physician & Registered Acupuncturist, Accord Medical Clinic. MBBS (NUS), Graduate Diploma in Family Medicine (NUS), Graduate Diploma in Acupuncture (Singapore College of TCM).
Last reviewed: August 2026
This page is general health education, not medical advice. Whether any treatment is appropriate for you is a decision made in consultation after assessment.
