(medicine) A small tube inserted into a body cavity to administer a drug, create an opening, distend a passageway, or remove fluid.

plural of catheter

(medicine) A catheter that is held in the bladder by an inflatable balloon

plural of indwelling catheter

A catheter left inside the body, either temporarily or permanently.

plural of Foley catheter

(medicine, surgery) A tubular instrument that can be introduced into the Eustachian tube in order to allow inflation of the middle ear through the nose or mouth.

plural of Eustachian catheter

The procedure of introducing a catheter.

(medicine) To introduce a catheter into part of the body.