Hi All
I would be very tempted to have a look at the instructions for use of the PC and see if it specifically excludes being used in a medical environment - as is the case with many pieces of domestic equipment - really difficult to choose a UPS at times.
Also, I had two customers with Welch Allyn 12 lead ECG unit that plugged into a computer - not a ambligatory monitor but proper 12 lead ecg module.
One customer used the unit on a laptop - and I had on worries with leakage current.
The second customer had the unit plugged into a desktop with CRT monitor and printer - and of course failed all earth leakage tests.
As for Bliuetooth, Nonin have got monitors that use bluetooth and Welch Allyn/Propaq use 802.11a,b, or g for there acuity systems.