(from Greek, kathienai: to send down) A narrow tube inserted into the body providing access for the infusion or withdrawal of fluids. Catheterization is the process of surgically implanting a...

A hollow tube inserted into the body to facilitate the passage of material either inwards or outwards, or to facilitate the administration of...

In medicine a catheter is a tube that can be inserted into a body cavity, duct or vessel. Catheters thereby allow drainage or injection of fluids or access by surgical instruments. The process of inserting a catheter is catheterisation. In most uses a...