An intravenous 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 called a catheter, which is inserted into a vein, usually in the arm or hand. This method allows for quick absorption and is often used in hospitals for patients who need immediate treatment. The intravenous line is connected to a bag containing the fluid or medication, which can be administered continuously or in controlled doses. Healthcare professionals monitor the line to ensure it functions properly and to prevent complications such as infection or blockage.