"DB9801 Supplement 1 emphasised that new equipment under test should not be subjected to currents or voltages exceeding those experienced under normal operating conditions. Hence none of the recommended tests involved shorting applied parts together or applying high voltages to electrodes. It was also suggested that medical electrical equipment not having applied parts could be safety tested satisfactorily using non-specialist portable appliance testers."
So if we consider Class III Battery powered devices, not connected to a charger, with no patient applied parts, visual inspection and output checks should suffice.
Class III BF/CF? such as in the case of wall mounted external AED Defib such as FR2? output checks, but applied parts (Apex/Sternum) patient auxilliary leakage current checks required, I would hazard a guess?