I can't put my finger on it, but I have my doubts the authors of the study have any experience with Software Development, Software Developers, or even heard of the stress and work conditions. I also have know some pretty stressed Dentists, Orthodontists, Anesthetists, Nurses, etc... I think this was devised by a rogue Statistician with sadistic streak.

Test leads and a lot of medical cabling is very cheaply made and unshielded. It is very easy to use induction to modify the reading the equipment is getting from the test leads without disconnecting anything. Disconnecting things would trigger alarms on the stuff sending data to the central monitoring station. Of course, you still need access to the patient.