I reciever a letter from the endo center that was to do my colonoscopy stating that an anesthesiologist would perfom the sedation. Fine, since propofol will be used, I'm comfortable with an MD, not a RN (CRNA) doing this. My wife (she's an MD) arrive and I get gowned and IV started).....before I sign the consent, my wife and I have questions for the anesthesiologist..........guess what? no MD in the building. A chatty CRNA tried to convince me that: "she was just as qualified and any anesthesiologist to administer propofol"..at that point my wife corrected her: "sorry. but you are a nurse. not a physician"....My wifeasked a great question; since we live in PA and the local hospital uses the ACT model for anesthesia cases, why praytell do they let nurses (CRNA) practice solo across the street at the endo facility? answer: it's profitable and dangerous for the patient...in the endo lab, CRNA need to be supervised just as they would be in a hospital. My wife was a nurse before going to med school...so she's sympathetic to nursing..BUT: I never want an unsupervised nurse (CRNA) doing my anesthesia.