IV insertion is a medical procedure used to place a thin, flexible tube called a catheter into a vein. This allows healthcare providers to deliver fluids, medications, or nutrients directly into the bloodstream. The procedure is typically performed on the arm or hand, where veins are more accessible. Before the insertion, the area is cleaned to prevent infection. A small needle is used to puncture the skin and enter the vein, after which the catheter is threaded into the vein and the needle is removed. Proper technique is essential to minimize discomfort and ensure the IV functions effectively.