The wireless plant is a good idea. I need one confederate to agree to carry it or wear it, but obviously much better than a cardioid from 10′ away.
Related question then: What could I get in the way of a small radio mic that would be versatile in this way, ie could be clipped to a clipboard, set down on a patient bed, clipped to the occasional doctor’s lab coat. Understand: I am not there. This is an installation, and I will be providing gear and training staff to use it. So something like a regular wireless lav is too hard to clip on, too likely to get trashed. I need something small, rugged, with mic capsule and transmitter in one housing, preferably with a clip. Does such a mic exist?