I can understand your point. I have been counseling a friend to design and implement remote amplifier with nominal pre-amplified signals coming from a remote location with battery fed from a central place. The moment a power line is switched on/off or a fan is switched on, (audio wires are in the same conduit of power), we had a hell of trouble. The thump and hum heard would be just crap.
After only separating them to another pre-earthed metal conduit , we were able to manage honorable audio.
In medical cases, the patience would be having low tolerence to disturbances, this is why i suggested that there is risk.