What's the difference between an ileostomy reversal surgery and a ileoproctostomy?

Here goes: The ileostomy reversal is removal of the stoma and hooking up the ileum to the colon (again) The ileoproctostomy hooks removes the stoma and hoks up the ileum to the upper rectum.

Amount of bowel: Ileum to another section of small intestine if available to maximize absorption surface, or anastomoses to section of colon or rectum if no other usable small intestine.

Colorectal Surgeon: The two surgeries you describe are very different. I am first going to presume you have an existing ileostomy. An "ileostomy reversal surgery" does exactly what the name suggests. Your diverted segment of small bowel will be reconnected to the prior site. A "ileoproctostomy" would instead take the small bowel and connect it directly to your rectum.

Bowel connections: Ileostomy reversal takes down outside cutaneous opening of ilium (part of small bowel) and attaches it to another loop of bowel usually colon for internal connection. Ilioproctostomy specifically attaches ilium to rectum.