Demand-flow apparatus with control of preset N2O-O2 mixture for use in labour.
D000769:Anesthesia, Inhalation / Q000295:instrumentation*; D005260:Female; D006801:Humans; D007743:Labor, Obstetric; D009609:Nitrous Oxide / Q000008:administration & dosage*; D010100:Oxygen / Q000008:administration & dosage*; D011247:Pregnancy
D009609:Nitrous Oxide; D010100:Oxygen