Revisions and Conversions After One Anastomosis Gastric Bypass (OAGB), Single Anastomosis Duodenal Ileostomy (SADI-S) and Biliopancreatic Diversion-Duodenal Switch (BPD-DS)

Bariatric procedures such as the One Anastomosis Gastric Bypass (OAGB), Single Anastomosis Duodenal Ileostomy (SADI-S) and Biliopancreatic Diversion-Duodenal Switch (BPD-DS) alter both the stomach and small bowel, causing robust weight loss. Surgical revisions may be required for nutritional issues as well as symptoms consistent with short bowel syndrome. Although not reported in high numbers, patients with OAGB can require revision for bile reflux and marginal ulcer. On the other hand, both SADI-S and BPD-DS rarely require revision for marginal ulcer or bile reflux, instead the majority of revisions are performed for nutritional issues, small intestinal bacterial overgrowth and short bowel syndrome. Overall, revisions for gastroesophageal reflux disease (GERD) are not common for any of these procedures. Finally, revisions for weight recidivism are not common and practitioners should be careful to measure muscle function, nutritional reserve and bone composition before increasing the degree of the intestinal bypass.