Hi FNR!
As Jules noted, in the US many surgeons do external “outpatient” external surgery which means the patient leaves the same day as the surgery. I think I went at 6 am & left by 2 pm so was there for about 6 hours. Also in the US many doctors only do one side at a time. Those who do both at once require an overnight stay in the hospital but no more than that unless there is a complication.