#endotracheal_tube  a catheter that is inserted into the trachea through the mouth or nose in order to maintain an open air passage or to deliver oxygen or to permit the suctioning of mucus or to prevent aspiration of the stomach contents
  supertype:  catheter  a thin flexible tube inserted into the body to permit introduction or withdrawal of fluids or to keep the passageway open
  subtype:  nasotracheal_tube  a tube inserted into the trachea through the nose and pharynx; used to deliver oxygen

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