Why should the printer (or anything else, other than the actual, patient contact or patient connected, medical equipment) be "medical grade" just as long as it is nicely secured on a decent cart and powered via an appropriate (yes, "medical grade") isolation transformer?
I reckon you need to establish exactly what the various codes require, what is actually meant by "the patient area", distances from the equipment to the "patient zone", and all the rest. And then proceed accordingly. It would pay you to have all relevant standards available "chapter and verse", especially when the time comes when you are trying to sell your systems into the hospitals.
