Hoping for a speedy recovery.
If they are letting his command in the room I would take it he came through the surgery with flying colors.
Probably hold him a few more days to make sure there is no infection from the surgery or no possible septic shock due to the intestines being involved but chances are they would have found that issue if it were going to happen.
Keep positive thoughts. Thankfully the younger tend to get through tough situations in quick fashion compared to us older folk who take longer to heal.