The easiest way to find out what DS surgery your surgeon is offering/performing is to simply ask how many Anastomosis you will have?
ONE (1) Anastomosis is the "Loop DS" and TWO (2) anastomosis is the True DS.
Here's some info I pulled from another forum regarding SADI-LOOP:
There is only one cut, no alimentary track/common channel - just a straight bypass of the first half of the small intestine; concerns include food backing up into the bypassed limb; bile reflux; the fact that you have in essence a 250 cm common channel with no alimentary limb - the downstream portion of the intestine after the pylorus is all fully absorbing everything (except of course the Vitamin and mineral absorption that normally occurs in the distal duodenum and jejunum).
IT IS NOT A DS. It has no selective fat malabsorption. It has 250 cm of fat ABSORPTION. Nothing like the "fat is essentially free" diet of a proper DS. And it has ONLY 250 cm of Protein absorption.
This is an EXPERIMENTAL procedure. It is not covered by insurance. It should only - in my opinion - be offered as part of a proper clinical trial, and NOT NOT NOT as a "cheaper, but just/almost as good" surgery offered to self-pays only. I have serious concerns about the ethics of doing that.
Note that there is another so-called "variant" of the DS being offered by a few surgeons, which is even further from a proper DS, and which in my opinion should not even be referred to using the term "DS" - the biliopancreatic diversion with bipartition" - it has a STOMA!
........
Seems to me SADI is a setup for:
1. Persistent bile reflux into the stomach (one of the joys of DS)
2. Hypoproteinemia (and subsequent third-spacing of fluids (edema))
3. Pooling of food in the proximal small intestine in patients with intestinal motility disorders (and maybe everyone to a degree)
4. Less fat malabsorption compared to DS with common channel less than 250cm (most DSers)
5. Less complex carb malabsorption (more contact time with pancreatic enzymes)
6. Suboptimal weight loss
7. Lesser resolution of diabetes type 2 compared to DS.
The only potential benefits I can see are less risk of fat-soluble vitamin deficiency and possibly less GI side effects.
And I cannot for the life of me understand the bipartition. Does the stoma act as a large sinkhole (dumping syndrome?)? Does the pressure of stomach peristalsis preferentially cause food to exit the stoma versus a competent pylorus? So much for ever taking NSAIDs again due to the risk of marginal ulcers.
It is scary to even begin comparing these surgeries. They will end up giving DS a bad reputation if a distinction is not made due to poor outcomes.
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