Bariatric surgical procedures. Examples of operative interventions used for surgical manipulation of the gastrointestinal tract. A. Laparoscopic adjustable gastric banding. B. Laparoscopic sleeve gastrectomy. C. The Roux-en-Y gastric bypass. D. Biliopancreatic diversion with duodenal switch. E. Biliopancreatic diversion. (From ML Kendrick, GF Dakin: Mayo Clin Proc 815:518, 2006; with permission.)