Usually, a hospital or clinic will leave questioneirrs for patients to fill out and leave in a sealed box,(supposedly). Its has everything to do with "office politics", truthfully speaking..the clinic or hospital wants positive PR, that makes patients want to go there. Employees have a harsh reality if they are understaffed and they have 2 perform other co-workers duties including their own..
Yes, laughing gas can kill if used for recreational purposes without properly safety in place. All of the things listed in question can happen along with hypoxia (low O2 levels) if person does not breathe in O2 in regular intervals.
