Respiratory performance and the Mid-O-Gas.
D000773:Anesthesia, Obstetrical / Q000295:instrumentation; D005260:Female; D006801:Humans; D007743:Labor, Obstetric; D009609:Nitrous Oxide / Q000032:analysis / Q000627:therapeutic use; D010100:Oxygen / Q000032:analysis / Q000627:therapeutic use; D010101:Oxygen Consumption; D011247:Pregnancy; D012119:Respiration; D012122:Ventilators, Mechanical
D009609:Nitrous Oxide; D010100:Oxygen