Better Surgey

[BlackPhoenix]

Boozing up before a surgery would even be historically accurate.

But how do you even apply anesthesia to a person? Wouldn't you have to open the tank before putting it on their body, letting it leak into the room for a few seconds? Or is the only option to have them open the valve themselves?

What they said, plus with those tanks you can't open them unless you have a mask on yourself, and they wouldn't stay open during the transition.