I would Google it and find out. I am not sure if you are asking me or another.

Briefly, my wife also had surgery for peritonitis and that might have contributed to her constipation.
Bottom line is that she can no longer eliminate in a normal way and what they diagnosis is pelvic floor.
Treatment may include excercise and the "old chestnut" diet! but she is at a point that nothing short of surgery is going to help so she is destined to have to pay for colonics or self treat which is not easy and it is very costly.
Sad to say we have not found a solution other than have a ostomy

Really tough deal