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Fig. 3A —Roux-en-Y gastric bypass procedure. Line diagram showing anatomy after Roux-en-Y gastric bypass procedure. In this procedure, 90% of stomach, entire duodenum, and proximal 30 cm of jejunum are excluded from digestion. Retrocolic version is demonstrated. Note short afferent loop at gastrojejunostomy, shown by circular staples. Duodenum is part of afferent loop at jejunojejunostomy, shown by linear sutures. (Used with permission of Visual Media, Indianapolis, IN)