As nouns,
endotracheal tube is a hyponym of
catheter; that is,
endotracheal tube is a
word with a more specific, narrower meaning than
catheter:
- catheter: a thin flexible tube inserted into the body to permit introduction or withdrawal of fluids or to keep the passageway open
- 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