Central Venous Access refers to a variety of intravenous catheters placed in patients requiring certain long-term medications. These are much smaller in diameter than dialysis lines, but are larger and longer than a standard intravenous line (IV.) Examples include Hickman Catheters, Peripherally Inserted Central Cathethers (or PICCs), Tunneled small bore central venous catheters and Mediports. These lines differ in where they are inserted but are all placed under imaging guidance and adjusted so the end of the catheter sits in the vena cava adjacent to the heart. These catheter are designed to deliver strong medications, such as chemotherapy or prolonged courses of antibiotics, which are either dosed too frequently to keep placing new IVs or too irritating to small veins be injected through a standard IV.