The SADI-S is a type of laparoscopic bariatric surgery with a single surgical anastomosis (duodeno-ileal bypass) and creating of small gastric sleeve such as in the sleeve technique. The technique can be more effective because of combination between gastric bypass and gastric sleeve and in comparison to the gastric sleeve – addtional performing of the intestinal loop where nutrients are absorbed.
It can be performed by laparoscopy. A small gastric sleeve is created by sectioning the greater curvature of the stomach, such as in the sleeve technique. Subsequently, the duodenum is transected respecting the pylorus. A duodenum-intestinal anastomosis is carried out between 250 centimetres (98 in) and 300 centimetres (120 in) from the ileocecal valve. Therefore, this distance becomes the length of the common channel where nutrients are absorbed.