What Is Gastric Bypass?
Roux-en-Y gastric bypass divides the upper stomach to create a small pouch and then connects that pouch to the small intestine. A second intestinal connection allows bile and digestive enzymes from the bypassed stomach and upper intestine to mix with food further downstream. The resulting anatomy resembles a Y, which explains the term Roux-en-Y.
Because the procedure reroutes the intestine, nutrition, medication absorption and long-term follow-up require particular attention.