catheter

Noun
  1. A thin flexible tube inserted into the body to permit introduction or withdrawal of fluids or to keep the passageway open (synset 102987924)
    is a type of: tube, tubing - conduit consisting of a long hollow object (usually cylindrical) used to hold and conduct objects or liquids or gases
    subtypes: 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

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