View your list of saved words. (You can log in using Facebook.)
Threading of a flexible tube (catheter) through a channel in the body to inject drugs or a contrast medium, measure and record flow and pressures, inspect structures, take samples, diagnose disorders, or clear blockages. A cardiac catheter, passed into the heart through an artery or vein (the incision is often in the groin), can also carry pacemaker electrodes. A bladder catheter goes through the urethra into the bladder.
This entry comes from Encyclopædia Britannica Concise. For the full entry on catheterization, visit Britannica.com.