I've only have one experience to go by... they walked the tube out of the room to another and checked it, while I was still laying there with my legs in that ever so comfortable skywards position. The nurse finally covered me up, legs still up, told the catheter was clear, we all had a chat for a few minutes. Then I was allowed to get up, taken back through to the waiting area, sat down and offered a drink or something to eat. Had to wait for FS to write out a prescription, and nurses to get the boxes of Crinone. This probably took somewhere around 10-15 minutes.
Then was allowed to get dressed, but was asked to hang around the hospital for another 20-30 minutes before leaving, so we went downstairs and had a drink and sandwich from the caffeteria, (plus we had to wait till we could get our car from the car park)