The British spelling of catheterization; the medical procedure of inserting a thin tube (catheter) into the body to drain fluids or deliver medication.
From 'catheter' (Greek 'katheter' meaning something inserted) plus '-isation' (British suffix for the process of making something). Medical term from the 18th century onward.
Catheters are among medicine's most ingenious inventions—thin flexible tubes that can navigate through blood vessels to deliver medicine directly to the heart, showing how understanding body anatomy enabled incredible medical advances.
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