What do I do now?

Case: “The first time”

I was a trainee working under the supervision of Dr M when a situation arose over informed consent. Mr W had been admitted four days earlier and was increasingly concerned about Dr M's search to find the reason for his mysterious set of symptoms. Dr M recommended that an invasive diagnostic procedure should be performed and she carefully explained all the reasons to the patient, including the potentially helpful information it could produce, as well as the possible complications. She also discussed what few alternatives were available and the relative advantages and disadvantages of each one. However, she concluded by noting that these were unlikely to produce very useful information.

Having confidence in Dr M's clinical judgment, Mr W said that he was willing to have the procedure. At that point, Dr M mentioned that she would like me to perform the test. She told Mr W that she would be present the whole time, and he gave consent. However, Dr M did not tell Mr W that this was the first time that I would be doing this procedure, nor did he ask about my previous experience. What does a patient have a right to know under these circumstances? Is it appropriate to inform a patient when a procedure is being performed for the first time?