The Single Anastomosis Duodeno-Ileostomy or SADI is a relatively newer and highly effective variation of the duodenal switch (DS), a procedure that has been around for a few decades.
The SADI has grown in popularity as an alternative to the more complex DS with similar (slightly lower weight loss potential) long-term results and fewer potential complications due to avoiding the second anastomosis or intestinal reconnection. On the flip side, SADI is a relatively newer procedure with less data behind it, and some insurance companies still consider it experimental and thus may not offer coverage.