While you make a valid point regarding bladder control, I am guessing that's not too much of a problem since he made it back to the bench already, hopefully without incident. Any 7 hour surery is major surgery, and obviously he is not feeling well enough to be on the sidelines, or more likely, it takes an awful lot out of him after the game adrenaline wears off.
Get well coach - a full recovery means a lot more to us than Ws and Ls.
Without getting too explicit, it could be some complication issues with urination or other things. Some people recover faster than others. Hard to say, but hopefully he gets better and back to the sideline soon. If he's out too much and doesn't come back full time relatively soon, it will hurt morale, player development and most of all recruiting. It is the harsh reality of it. I don't think Lavin planned on recovery taking this long. I too hope he is FULLY recovered and it is only stamina that is an issue. We need you back Steve!