Yes. Indeed. The kind of little
dodad *devices that I like to fiddle about with myself, in fact.

Careful, though Brian ... someone will be shouting about radio-born interference before you know it. And they would have a point, would they not?
Bluetooth ... adequate for the medical environment (or not)? Please discuss!
*
That is, what was wrong with the Psion Series 3 organiser? Or, indeed, the GameBoy ... if all we are trying to do is keep the anaesthetist awake?However, in the interests of
parity, we shall need to source an alternative. And, don't forget Tim
Gee.
And (lastly) ... medical-quality (that is, meeting specified construction requirements, certain low levels of leakage current
etc.)
isolation transformers. Yes. Very good. Now we can anticipate the next question, can we not? That is "how do we carry out EST on systems that contain an isolation transformer"?
Anyone care to have a go? As I say, I have other pressing matters to attend to.