A<unk>  <unk> , also known as a central line(c-line), central<unk>  line, or central<unk>  access catheter, is a catheter placed into a large vein. It is a form of<unk>  access. Placement of larger catheters in more centrally located veins is often needed in critically ill patients, or in those requiring prolonged intravenous therapies, for more reliable vascular access. These catheters are commonly placed in veins in the neck (internal jugular vein), chest (subclavian vein or axillary vein), groin (femoral vein), or through veins in the arms (also known as a PICC line, or peripherally inserted central catheters). Central lines are used to administer medication or fluids that are unable to be taken by mouth or would harm a smaller peripheral vein, obtain blood tests (specifically the "central<unk>  oxygen saturation"), administer fluid or blood products for large volume resuscitation, and measure central<unk>  pressure. The catheters used are commonly 15–30 cm in length, made of silicone or polyurethane, and have single or multiple lumens for infusion.
Central venous catheter
Peripheral venous catheter
Arterial line
Quinton catheter
Peripherally inserted central catheter
Vascular closure device
Hickman line
Vascular access