Failure of a new system to prevent delivery of hypoxic gas mixture.
D000769:Anesthesia, Inhalation / Q000009:adverse effects / Q000295:instrumentation*; D006801:Humans; D009609:Nitrous Oxide / Q000008:administration & dosage; D010100:Oxygen / Q000008:administration & dosage*
D009609:Nitrous Oxide; D010100:Oxygen