title: "Silent" regurgitation during general anesthesia.
mesh_terms: D000328:Adult; D000368:Aged; D000768:Anesthesia, General; D000769:Anesthesia, Inhalation; D004396:Coloring Agents; D005764:Gastroesophageal Reflux / Q000453:epidemiology*; D006221:Halothane; D006801:Humans; D001239:Inhalation; D007441:Intubation, Gastrointestinal; D007442:Intubation, Intratracheal; D008875:Middle Aged; D009609:Nitrous Oxide; D009666:Nose; D010100:Oxygen; D011187:Posture
chemical_list: D004396:Coloring Agents; D009609:Nitrous Oxide; D010100:Oxygen; D006221:Halothane