Mini Gastric Bypass (OAGB)

The Mini Gastric Bypass, also called One Anastomosis Gastric Bypass (OAGB), is a simpler weight loss surgery that creates a smaller stomach pouch and reroutes part of the small intestine. This helps you feel full with less food and reduces calorie absorption. It takes less time to perform than traditional gastric bypass and has shown excellent long-term weight loss results.

One Anastomosis Gastric Bypass (OAGB) involves creating a long, narrow gastric pouch along the lesser curvature and anastomosing it to a loop of jejunum approximately 150-200 cm distal to the ligament of Treitz. This achieves both restriction and malabsorption with a single anastomosis, reducing operative time and potential leak sites compared to Roux-en-Y gastric bypass. Systematic reviews show mean excess weight loss of 70-80% at 5 years, comparable to or exceeding RYGB outcomes.

For patients considering weight loss surgery, understanding all available options — including the Mini Gastric Bypass — is essential for making an informed choice. Dr Joseph Wang at Accord Medical Clinic can explain the risks, benefits, and suitability of each bariatric procedure for your specific health profile.