I got my first one nearly 30 yrs after my pouch creation...never had post-op ileus until I did, then again I didn't have any adhesions either.
I started getting blockages regularly after age 50...always in the same spot...Turned out that I had a loop of bowel stuck to the inside of the wall and looped up over itself. Looked like a roller coaster.
Once my surgeon "liberated it " (a French expression) I was free for about 2 yrs then it sort of returned but less violently...for now, I get a mild version of blockages for shorter periods of time...about 12 hrs and I can still drink fluids while I have them.
I know that my guts are not 'normal' since I have had all of the surgeries and that I will pay the price over time but I try to recognize the signs quickly and act accordingly. (clear fluids, hot soups, Gravol or other similar meds, walking, rolling or bouncing on a yoga ball and heating pads).
I would wait until your surgeon takes a peek at your exams to decide on the next step but keeping active and avoiding thickeners like mashed potatoes, chunky foods and excess fibers are good preventative measures.
Sharon
ps. I gave up codine...it stops my guts cold and starts my blockages