I recently had a colonoscopy to determine whether I was at risk of colon cancer, for which my father is being treated.
During a colonoscopy the patient is sedated/anesthetized since the colon is filled with air to expand it so that the doctor can observe the lining of the colon, all the way around to the appendix. The patient must be immobile.
The anesthetic agent used was "Propofol". As soon as the anesthetist mentioned he had started it, I could feel the drowsy feeling and then lights out. The next thing I realized was becoming conscious or 'waking up' where I had started in the prep/recovery room.
http://en.wikipedia.org/wiki/PropofolPropofol is a short-acting intravenous anesthetic agent used for the induction of general anesthesia in adult patients and pediatric patients older than 3 years of age.
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