title: An oxygen failure warning and patient protection system. The Howison Unit.
abstract: A device is described which sounds an alarm to warn of oxygen supply failure. A the same time the nitrous oxide flow is cut off, and a reservoir in the device provides a continuing oxygen flow to the patient for about a minute. This results in increased inspired oxygen levels temporarily, reducing the risk to the patient while the oxygen failure is being corrected.
mesh_terms: D000776:Anesthesiology / Q000295:instrumentation*; D005069:Evaluation Studies as Topic; D010100:Oxygen; D011312:Pressure; D012449:Safety
chemical_list: D010100:Oxygen