Tetany during general anaesthesia.
D000769:Anesthesia, Inhalation / Q000009:adverse effects*; D005260:Female; D006221:Halothane; D006801:Humans; D008875:Middle Aged; D009609:Nitrous Oxide; D013746:Tetany / Q000209:etiology*
D009609:Nitrous Oxide; D006221:Halothane