catheter

1. (medicine) A small tube inserted into a body cavity to administer a drug, create an opening, distend a passageway, or remove fluid.Examples: "And I humbly hope, that the Deſcription, and the Method of uſing this Catheter, will be a means of reviving an Operation ſo happily begun, and calculated for the Good of thoſe that are afflicted with the Stone in the Bladder."; "Of course there are two kinds of catheters, one intended for the male, the other for the female urethra. The common catheter is a silver tube, of such diameter as will allow it to be introduced with ease into the urethra, and of various figures and lengths, according as it is intended for the young or adult, the male or female, subject."; "Careful positioning of the catheter is essential to achieve a technically satisfactory dialysis. Final placement is made by assessing drainage and by positioning the tip of the catheter according to the patient's comfort."