Therapy
Central Venous Catheter
A central line is a thin tube placed into a large vein to give medicines, fluids or nutrition, or to take blood, usually over a longer period.
Quick answer
Central Venous Catheter: what it is, why it's done and what happens
A central venous catheter is a fine tube whose tip sits in a large vein near the heart. Types include lines placed in the neck or chest, and PICC lines inserted through a vein in the arm.
- Why it is done: It is used to give treatments that need a large vein — such as chemotherapy, strong medicines, intravenous nutrition or frequent blood tests — and in intensive care, avoiding repeated needles in smaller veins.
- What happens: Under local anaesthetic and often ultrasound guidance, the line is inserted into a vein and its position checked, sometimes with an X-ray.
What it is
A central venous catheter is a fine tube whose tip sits in a large vein near the heart. Types include lines placed in the neck or chest, and PICC lines inserted through a vein in the arm.
Why it is done
It is used to give treatments that need a large vein — such as chemotherapy, strong medicines, intravenous nutrition or frequent blood tests — and in intensive care, avoiding repeated needles in smaller veins.
What happens
Under local anaesthetic and often ultrasound guidance, the line is inserted into a vein and its position checked, sometimes with an X-ray. It can stay in place for days, weeks or longer depending on the type.
Recovery
The line is used for treatment while in place and needs regular care to keep it clean and prevent blockage. It is removed simply once no longer needed, and the small site heals over.
Good to know
Risks and things to consider
Risks include infection (a particular concern with central lines), bleeding, blood clots, and, at insertion, a small risk of a collapsed lung for chest or neck lines. Careful care reduces these risks.
Education and reference only. This explains the procedure in general terms and is not medical advice. Your own care, risks and recovery will be explained by the team looking after you.
Answers
Central Venous Catheter: frequently asked questions
Why use a central line instead of a normal drip?
A central line reaches a large vein, allowing strong medicines, nutrition or frequent treatments to be given safely over a long period, and avoids repeated needles in small arm veins.
How is the line kept from getting infected?
Strict clean techniques when using the line, regular dressing changes and prompt attention to any redness, pain or fever help prevent infection, which is the main risk with central lines.
Related
Other therapy
Sources
Where this is drawn from
- NHS — Tests and treatments
- NICE — procedure and treatment guidance
- Relevant Royal College / professional body
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