A 28-year-old, blind and mentally retarded male with bleeding gums is scheduled for a dental exam, cleaning and scaling under general anesthesia at an ambulatory surgery center due to his inability to cooperate with a full exam and treatment. During the pre-op exam two days before, staff inform the patient's mother that her son must be NPO after midnight. On the day of the procedure, the mother reports that the patient last ate at 9:30 p.m., at which time he took his first dose of Diazepam 10mg PO. A nurse administers the second dose at 7:30 a.m. Anesthesia is induced without incident at 7:41 a.m. The procedure begins at 8:20 a.m. and ends without complications at 10:20 a.m.