ASL STEM

Definition

Intravenous therapy (IV therapy in short) is the infusion of liquid substances directly into a vein. Intravenous simply means "within vein". Therapies administered intravenously are often included in the designation of specialty drugs. It is commonly referred to as a drip because many systems of administration employ a drip chamber, which prevents air from entering the blood stream (air embolism), and allows an estimation of flow rate.

Source: https://en.wikipedia.org/wiki/Intravenous_therapy