It is a procedure done to stretch strictures with a balloon inserted during a colonoscopy/sigmoidoscopy to prevent a blockage. I have it done once a year and at that time they check for activity and polyps as well. My insurance requires it is done at the hospital, rather than at at the doctors office to be covered. I think I have been having this for almost 10 years and it has worked for me. I do not have active Crohn's, not on any medication. The stricture from 2 previous surgeries is my problem