I see. Well, then I guess you can ask your brother how he would say "I'm going to rip you a new one!*" in physician's speak, and then you're getting pretty close to what this particular medical procedure is about. 
*Well, not exactly a new one. It's still the same one. The German way of uttering this "threat" is more accurate, actually.
One of the things that Crohn's disease can cause, btw.

*Well, not exactly a new one. It's still the same one. The German way of uttering this "threat" is more accurate, actually.

One of the things that Crohn's disease can cause, btw.