Compared with the classical duodenal switch surgery (BPD/DS), SADi-S uses restrictive and hypoabsorptive techniques to drastically lower a patient’s BMI with a less complex operation.
The two-anastomosis biliopancreatic diversion with duodenal switch (DS-BPD) was invented in 1986 and modeled after the RNY gastric bypass. The core difference was a longer portion of the Y-shaped intestine rerouted while maintaining a larger stomach pouch. The most distal segment of the small bowel was reattached to the stomach. DS had a majority of intestines bypassed to reduce calories, vitamins, and minerals absorption.
The word “anastomosis” means a “surgical connection” – for example, cutting and end of the small intestine and attaching it to the surface of the skin to form a temporary stoma, or when pieces of the intestine and a piece of the stomach are brought together to form a continuous tube.
SADI vs. BPD-DS
In novel SADIS surgery, the Roux-en-Y construction (BPD-DS) is replaced with a single duodeno-ileal anastomosis. SADIS has a lower risk of diarrhea, flatulence, nutritional deficiencies, and intestinal obstruction, frequently experienced with a standard duodenal switch. It is most suitable for patients with class III obesity (BMI > 40). Patients do not have reflux.