Although none I ever interviewed required it, I assume most hospitals of that type have some sort of restraints if needed. That way I never had to enter the secure area and I got my job done with little fuss.
We had a similar incident at a private hospital where the uniform officer was called to take a report from a patient. The officer called me because they wouldn't allow him in armed and he refused to disarm. I talked to the head nurse who, upon thinking about it, realized the 9 year old girl he was sent to talk to probably wasn't a horrible threat to anyone so they allowed her out long enough for him to do his job.
Too often, people get so caught up in rules that they don't see simple solutions.