Hello, Sonny.
If you have soreness or are nervous in any way about the pouchoscopy, let them know a few days in advance you need to be sedated so they can be prepared for you. If you are awake, you might tense up your muscles back there and that will make it difficult and painful to put the scope camera in.
Each doctor has their preference, but your doctor might ask you to stop eating 12 hours before your procedure, and to empty your pouch before your procedure so they have a clear view of everything inside with no stool in the way. This procedure isn't like a colonoscopy where you have to drink the litre of prep solution and stay near a bathroom. You will never have a colonoscopy again! I didn't fast, but I ate very light chicken broth for dinner, and I skipped breakfast that morning to make emptying easier.
When you arrive they will put an IV line into your arm so they can give you the sedation as soon as you are on the table. Same as the big surgery. My procedure took close to 90 minutes from moment of sedation to waking up to cookies and juice from the nurse. But bring a light snack with you in case they don't offer anything. Drink lots of water to flush out the drug. As BillV said, you will have mild memory loss, maybe the first hour or two, and whatever they tell you about the scope or home-instructions, you Will Not Remember it! You must have someone take you home, they will not release you otherwise, and your motor skills might be impaired from the sedation so don't think you can drive. You might feel a bit sore back there, but you might be perfectly okay since you did not tense up. I came home afterward and napped until the drug wore off. Some people experience minor bleeding from the scope being moved around inside. If you have a lot of blood, of course call your doctor. You should get the biopsy results in a week and schedule a follow up appointment to discuss. If they don't schedule follow up, call them and request it. I'm glad you got through the appointment on Monday, and you will be fine on August 19. Compared to your big surgery and the takedown, pouchoscopy is a breeze!