It is miserable waiting. I have collected a few different ice packs from the pharmacy and home health over the years. I find I like a bigger square ish one to sit one, longer ones for both sides of thigh and knee if needed. We found one today in my collection that is quite long and tubular and fits nicely in the thigh crease and into the groin. Ice irritated me pre-op an although it didn't help the pain, I liked heat for the soothing.