Central venous access catheter. Definition

Medical Definition: Central venous access catheter

Tube surgically placed into a blood vessel to administer intravenous fluids and medications. It can also be used to obtain blood samples. This device avoids the need to insert separate needles for each injection or blood test. Examples of such devices include Hickman catheters, which require clamps to make sure the valve is closed, and Groshong catheters, which have a valve that opens when fluid is withdrawn or injected and remains closed when not in use.

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