Fig. 1.

 Roux-en-Y gastric bypass configuration. The proximal jejunum is divided distal to the ligament of Treitz. A side-to-side jejunojejunostomy is performed. The gastric pouch is created by repeated application of a linear cutter. The pouch is based on the lesser curve and oriented vertically with exclusion of the gastric fundus. The Roux limb is brought up in a retrocolic position and lies anterior to the stomach remnant and a gastrojejunostomy is performed. The length of the Roux limb is usually ± 130 cm and the length of the biliopancreatic limb from the ligament of Treitz to the jejunojejunal anastomosis usually varies from 30 to 50 cm.