The One Anastomosis Gastric Bypass (OAGB), also known as “mini-gastric bypass” is a newer version of the Roux en Y Bypass, wherein the surgeon creates a new path for food that bypasses a large part of the stomach and the first part of the small intestine.
Weight loss is achieved through both restriction (the new gastric pouch can hold only a small quantity of food) and malabsorption. Bypassing a sizable segment of the intestine, the remaining intestine is not long enough for normal nutrient absorption leading to malabsorption.
*Patients must adhere to a strict diet plan and supplement with vitamins to ensure successful weight loss and health after surgery.