Intravenous infusion

The slow introduction, over hours or days, of fluid into the bloodstream through a cannula (thin plastic tube) inserted into a vein. Commonly known as a drip, an intravenous injection is used to give blood (see blood transfusion) or, more commonly, fluids and essential salts. Other uses include providing nutrients to people unable to digest food (see feeding, artificial) and the administration of certain drugs.


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