Not unless there is something to be gained that justifies the risk and there is no safer way of determining it.

There will always be the argument of whether doctors do too much testing or not enough. MrsD answered the question of why to do it (i.e. what it might reveal). I answered the question why not to do it. I'm not trying to tell anyone not to do it; I'm just pointing out a risk that I believe is downplayed/overlooked. The decision is between doctor and patient, but I believe that decision should be an informed one. The days of patient acquiescence are over.

Doc