An intravenous line, often called an IV line, is a medical device used to deliver fluids, medications, or nutrients directly into a patient's bloodstream. It consists of a thin, flexible tube that is inserted into a vein, usually in the arm or hand. This method allows for quick absorption and is commonly used in hospitals for patients who need immediate treatment. IV lines can also be used for hydration, blood transfusions, and administering anesthesia during surgeries. They are monitored closely by healthcare professionals to ensure proper function and to prevent complications, such as infection or phlebitis, which is inflammation of the vein.