Even if your trustee doesn't know anything about medicine, frequent demands for hospital staff to "wash your hands before touching the patient" and "explain to me what you're doing now" still let the staff know that making a mistake with this particular patient could be costlier than with another patient.

I hypothesize that fewer avoidable mistakes will be made, due to care-providers exercising more caution while under the strict scrutiny of your trustee. If they know anything at all about medicine, the outcome is likely to be even better.