Hello Paul, I agree with Malcolm's EN60601-1. We've solved this problem in our ICU. The non-ME PC should not be in the Patient environment - (1.5m around the patient bed). All ME devices in the Patient environment should be connected with the hospital net or non-ME PCs against the rule 16.5 Separation devices. We, in Czech republic, have own national standard harmonized with EN, but I think you too. I discovered this page http://download.aims-net.com/download/IEC_60601-1ed31_uviiBeF1nit9.pdf Look for: patient environment, separation devices. Good luck and greeting from Prague!