Any way to prevent strictures?
Unfortunately, no. It's just your body "over healing" where the pouch connects to your small intestine. It heals so much that food can't get through the opening. Some people do need to have it dilated several times.
Please note: I AM NOT A DOCTOR. If you want medical advice, talk to your doctor. Whatever I post, there is probably some surgeon or other health care provider somewhere that disagrees with me. If you want to know what your surgeon thinks, then ask him or her. Check out my blog.