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Bariatric surgery procedures. In the Roux-en-Y Gastric Bypass procedure a small stomach pouch is created under the esophagus. The jejunum is then attached to this pouch causing nutrient flow to bypass the proximal part of the duodenum. In the vertical sleeve gastrectomy procedure about 80% of the stomach is removed along the greater curvature. The intestines are left unaltered.
