A catheter inserted through the neck, used to monitor central venous pressure in conditions such as shock where fluid balance is severely upset.
A venous access device inserted into and kept in the vena cava, innominate, or subclavian veins. It is used to infuse fluids and medicines, or for gaining access to the heart to measure pressures in the venous circulation. Keeping the line open permits later venous access when the veins might be collapsed and difficult to enter.
A tube inserted through a needle into a major central vein within the body.