1. a thin flexible tube inserted into the body to remove fluids or introduce medication
Usage: medical

Examples

• The nurse inserted a catheter to drain the patient’s bladder.
• After surgery, he had a catheter for several days.
• The doctor used a catheter to deliver medication directly to the heart.
• Catheters must be kept sterile to prevent infection.
• The urinary catheter was removed once the patient could walk.
• A cardiac catheter helped diagnose the blockage in his artery.