Why do hospitals use saline solution in a patients iv?

Hospitals use saline solution in a patient's IV primarily to maintain hydration, restore electrolyte balance, and deliver medications. Saline, which is a sterile solution of sodium chloride in water, helps to prevent dehydration and supports various bodily functions. It can also serve as a vehicle for administering other intravenous drugs and facilitates the dilution of medications, ensuring safe and effective delivery.