1. The medical procedure of inserting a catheter (a thin tube) into a body cavity, vessel, or organ, typically for diagnostic or therapeutic purposes.
Usage: British spelling; American English uses 'catheterization'; Common in medical and healthcare contexts

Examples

• The patient underwent catheterisation to relieve urinary retention.
• Cardiac catheterisation allowed doctors to examine the coronary arteries.
• The nurse prepared the equipment for the catheterisation procedure.
• Catheterisation is often used to deliver medication directly into the bloodstream.
• The doctor explained the risks and benefits of catheterisation before the operation.