Why is weight loss revision slower in weight loss?

I like your question. We really don't have good revision surgeries for failed weight loss procedures except if there is a fistula, or the patient had a band, or the gastric pouch was too large and not properly doneIn your case, how big was the fistula and how was it diagnosed?

Dr. Darido alludes to the real answer as to why weight loss is slow after revision surgery.  With a revision you can fix a problem such as a fistula or improperly performed operation; but if the first operation was done right, you shouldn't really expect to lose more weight at all!  That's why are reluctant to do revisions.  Patients who regain weight come in asking to have the operation "redone," as if such a thing can be done.  No, you already have a gastric bypass.  There is nothing to do except tell you to eat the right foods and exercise.  Doing the operation again changes nothing and accomplishes nothing.  You may lose some weight just because of the insult of the surgery to your body, but it won't last.