A 'too close to the door' knob.
Jenkins
I R
IR
D000293:Adolescent; D000769:Anesthesia, Inhalation / Q000295:instrumentation*; D004737:Enflurane; D004867:Equipment Design; D004868:Equipment Failure; D006801:Humans; D000860:Hypoxia / Q000209:etiology*; D008297:Male; D009609:Nitrous Oxide; D010092:Oximetry; D010100:Oxygen
D004737:Enflurane; D009609:Nitrous Oxide; D010100:Oxygen