Endoscopy
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Patient controlled sedation (PCS) is becoming increasingly popular in day-case surgery and has the potential for use during endoscopy. We aimed to examine its safety and acceptability during colonoscopy in a pilot study using alfentanil and propofol and assess its influence on the patient's recovery time. ⋯ PCS with propofol and alfentanil is an effective, short-acting form of sedation for patients undergoing colonoscopy and may be an alternative to benzodiazepines.