I only get scopes as needed usually for a pouch twist, a valve problem or leakage (normally due to my pouch falling off of the wall).
I stick to a light meal 24hrs prior to the scope and no fibers. I switch to clear fluids after 6pm.
That is it for the prep! No bowel prep, no magnesium whatever.
As for the scopes, I have never had any anesthesia since I've had my K pouch.
I watch, comment, direct traffic so to speak.
They use a simple child's scope so as not to injure my pouch and usually inject opac afterward and take a few pictures.
Depending on what they find, they will take a biopsy or not...at least that is how it happens here.
Good luck
Sharon