The fact that most medical electrical equipment never fails an electrical safety tests is testament to the good design of modern equipment.

It does not mean we don't need to test and it certainly doesn't remove the need to compare previous results to see if there is an upward trend in leakage values, which would indicate a potential imminent failure, especially in the case of ultrasound transducers. Simply using the test limits (60601 or 62353 etc.) as a guide is not really acceptable for routine field testing as it could lull you into a false sense of security (again especially true when testing US probes).

Test equipment manufactures should be encouraged to produce test gear and software that makes the task of testing and recording, including previous test comparisons, as simple as possible so there is less room for error. This can only increase the level of safety already designed into the equipment which surely must be a good thing?