Central Venous Catheterization is a medical procedure used to place a thin, flexible tube called a catheter into a large vein, typically in the neck, chest, or groin. This catheter allows for the administration of medications, fluids, or nutrients directly into the bloodstream and can also be used for blood sampling. The procedure is usually performed by a trained healthcare professional under sterile conditions. It involves using ultrasound guidance to locate the vein and inserting the catheter with precision. Central Venous Catheters are essential in critical care settings and for patients requiring long-term intravenous therapy.