According to Mercy, SADI, otherwise referred to as Single Anastomosis Duodenal Switch, is a weight loss surgery designed for people with severe, or class three obesity, meaning they have a BMI ...

SADI-S is a bariatric, or weight loss, surgery combining two weight loss procedures: a sleeve gastrectomy and a duodenal switch, according to the American Society for Metabolic and Bariatric Surgery.