Having had far too many surgeries in my years, I don't this is a concern. OR's are very busy places as are recovery rooms. They're bustling with people and activity. I've never been wheeled by a single person, always two, and always gazillions of people all over the place everywhere I've been wheeled.
He didn't have any medical experience or schooling, right? I can't imagine the hospital leaving a "grunt" alone with vulnerable patients...