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Gastric Bypass Surgery

©Ethicon, Inc. (2015). Reproduced with permission.

Gastric bypass surgery is an operation that creates a small stomach pouch to restrict food intake. This surgery re-routes a segment of your intestine to decrease the absorption of food by about 20%. During the gastric bypass procedure, the surgeon makes a direct connection from the stomach to the lower segment of the small intestine, bypassing the duodenum (the first part of the small intestine) and some of the jejunum (the second part of the small intestine).  This delays the mixing of ingested food and digestive enzymes.

With this surgery, patients can expect to lose about 60 – 70% of their excess body weight.