Tunneled Catheter: What It Is, How It's Placed, Risks and Care
Updated: 6 days ago
Written and medically reviewed by Dr. Baraa Alnahhal, MD · Last reviewed: October 2026 · How we review
Quick Answer: What is a tunneled catheter?
A tunneled catheter is a central venous catheter that runs a short distance under the skin before entering a large vein, with its tip resting near or in the heart. It can stay in place for months or years, giving access for medicines, fluids, blood draws, dialysis and IV nutrition without new needle sticks. Report fever or site redness promptly. [1]
What the research says
Tunneling cuts bloodstream infections by about half. A meta-analysis of 4 randomized trials (2,659 hospitalized adults, 177,879 catheter-days) found 0.31 bloodstream infections per 1,000 catheter-days with tunneled PICC lines versus 0.68 with conventionally placed ones — a 52% lower risk (risk ratio 0.48). (Shim et al., Cardiovasc Intervent Radiol, 2026) [2]
In children with cancer, ports had fewer problems than external tunneled lines. Across 23 studies covering 6,644 devices, external tunneled catheters carried about twice the odds of bloodstream infection (odds ratio 2.10) and over three times the odds of early removal (odds ratio 3.24) compared with implanted ports. (Neville et al., Arch Dis Child, 2023) [3]
For home IV nutrition, the best device is still debated. A meta-analysis of 10 studies (1,139 patients) recorded 1.01 bloodstream infections per 1,000 days with tunneled central catheters versus 0.77 with PICC lines (risk ratio 0.40 favoring PICCs), though the authors rated the evidence as very low certainty. (Zheng et al., Front Nutr, 2026) [4]
Key takeaways
A tunneled catheter is a type of central venous catheter that travels under the skin before it enters a vein. [1]
The tunnel helps hold the line in place and lowers the chance of infection. [1]
There are two types: cuffed tunneled catheters and subcutaneous ports. [1]
It can stay in for months or years, sparing you repeated needle sticks. [1]
Pain, redness, swelling, fever or a shifted line need a call to your care team right away. [1]
How a tunneled catheter travels from the skin, through a short tunnel, into a central vein and down to the heart.
What is a tunneled catheter?
A tunneled catheter is a central venous catheter (CVC), also called a central line, that "tunnels" under your skin before entering a central vein. [1]
Central venous catheters are tubes that go into a vein and lead down toward the heart. The tip sits in the superior vena cava, just outside the heart, or in the right atrium, the first chamber blood enters. [1]
The tunnel is what makes this line different. It secures the catheter and lowers your odds of infection, so the line can stay in much longer than a standard IV. [1]
What is a tunneled catheter used for?
A tunneled catheter is used when you need reliable access to your bloodstream again and again over a long period. [1]
Use | What it means for you |
IV medicines and fluids | Treatments go straight into a large vein |
Blood is filtered when the kidneys can't do the job | |
Blood components are separated and removed | |
Frequent blood tests | Samples are drawn from the line instead of your arm |
Parenteral nutrition | Nutrients are delivered directly into the blood |
For some people, the catheter is long-term or even permanent. For others, it is a bridge until a long-term option is ready, such as surgery to create an arteriovenous fistula or an arteriovenous graft for long-term dialysis. [1]
What are the types of tunneled catheters?
The two types of tunneled catheters are cuffed tunneled catheters and subcutaneous ports. [1]
Cuffed tunneled catheters have a small ring of fiber material around the tube. As your body heals, scar tissue grows into the ring and locks the tube in place. One end stays outside your skin, with attachments your care team uses to draw blood and give medicines. This type is semi-permanent: it stays until a procedure removes it. [1]
Subcutaneous ports connect to a tunneled catheter, but the port sits just under your skin instead of coming out through an opening. Your provider reaches it with a special needle made for the port. [1]
Feature | Cuffed tunneled catheter | Subcutaneous port |
Visible outside the body | Yes, one end | No, fully under the skin |
How it's accessed | Attachments on the outside end | Special port needle |
Showering | Allowed, but never submerge it | Allowed |
Bathing and swimming | Not underwater | Allowed normally |
Vein sites | Neck, collarbone or groin | Neck or collarbone only |
Easy to hide | Yes, under clothing | Yes, under the skin |
The two types of tunneled catheters: a cuffed line with an outside end, and a port that sits fully under the skin.
How is a tunneled catheter placed?
A tunneled catheter is usually placed by a surgeon in an operating room, where a sterile setting lowers the risk of infection. [1]
Numbing. Your skin is sterilized and a local anesthetic numbs the area, so you won't feel pain during the procedure. [1]
Small incision. The surgeon makes a small cut near a major vein, usually in the chest or groin. [1]
Tunneling. The tube is inserted into the incision and run under the skin for a short distance. [1]
Entering the vein. The tube is placed into the vein, much like a needle entering a vein in your arm. [1]
Positioning the tip. The tube is threaded through the veins down to the right atrium of the heart. [1]
The exact approach depends on the type of catheter, which vein is used, your health history and your preferences. For example, someone who swims regularly may prefer a subcutaneous port. [1]
Where on the body is a tunneled catheter placed?
A tunneled catheter is placed in one of three major veins: the internal jugular, the subclavian or the femoral vein. [1]
Vein | Insertion point | Cuffed catheter | Subcutaneous port |
Internal jugular (IJ) | Where the neck meets the chest | ✓ | ✓ |
Subclavian (SC) | Near the collarbone | ✓ | ✓ |
Femoral | Upper thigh near the groin | ✓ | ✗ |
Your provider will recommend the site that suits the catheter type and your situation. [1]
What are the benefits of a tunneled catheter?
The main benefit of a tunneled catheter is long-term IV access without repeated needle insertions through the skin. [1]
Long-term access: One line can be used many times. [1]
Multipurpose: It works for blood tests, medicines, fluids and IV nutrients. [1]
Lower infection odds: Tunneling makes central line–associated bloodstream infections less likely. [1]
Discreet: Cuffed lines hide under clothing; ports sit under the skin. [1]
Daily life continues: You can shower with a cuffed line (without submerging it), and bathe, shower or swim normally with a port. [1]
What are the risks of a tunneled catheter?
The risks of a tunneled catheter include infection, blood clots and blockages, and some complications can be severe. [1]
Risk | Note |
Infection | Includes central line–associated bloodstream infections |
— | |
Blockage inside the tube (occlusion) | — |
— | |
Catheter slipping out of place | — |
Tube bending, kinking or splitting | — |
Narrowing of the central vein (stenosis) | — |
Leaks from the line (extravasation) | — |
Puncture of a nearby artery | Only possible during insertion |
Only possible during insertion |
Your provider can tell you which risks are most likely in your case and how to avoid them. [1]
How do you care for a tunneled catheter at home?
Caring for a tunneled catheter starts with clean hands and a clean, dry, intact dressing every day. [1]
Do:
Wash your hands with soap and water every time before you touch the site. [1]
Check the dressing daily to make sure it is clean, dry and undamaged. [1]
Have the dressing changed as recommended — only healthcare providers should do this, never you or your family. [1]
Cover the site as advised whenever you shower or bathe. [1]
Don't:
Pull on, pinch or tug the line. [1]
Lift anything before your provider clears you. [1]
Play contact sports or do activities that could snag, pull or damage the catheter. [1]
Put the catheter underwater unless your provider says it's safe. This applies only to ports — cuffed tunneled lines should never go underwater. [1]
Daily care habits and the warning signs to report right away.
When should you call your doctor about a tunneled catheter?
You should call your healthcare provider right away about any change at or around your catheter site, including where a cuffed line enters the skin or where a port sits under the skin. [1]
Warning signs to report:
Pain
Redness or other skin discoloration
Swelling
Fever
Feeling generally unwell (malaise)
Vomiting
Stiffness around the catheter site
Cracking or splitting of the line (rare)
Any part of the line or port shifting out of position
Pain or discomfort when you move the arm on the catheter side, change position or cough
Ask your provider ahead of time what to do if any of these happen. Call 911 or your local emergency number for sudden shortness of breath, chest pain, or swelling of your arm, neck or face. Being prepared helps you avoid complications, including some that can be life-threatening. [1]
Conclusion
A tunneled catheter is a lifeline for people who need long-term access to their bloodstream. One procedure can spare you from repeated needle sticks and serve many purposes — blood draws, medicines, fluids, dialysis and IV nutrition. [1]
Knowing your catheter type, keeping the site clean and protected, and reporting warning signs early are the three habits that help you get the most from it safely.
Have a question about your catheter or an upcoming procedure? Explore our central venous catheter guide and dialysis guide, and bookmark Rinnit.com for clear, doctor-reviewed health explainers you can trust.
FAQ
What is a tunneled catheter used for?
A tunneled catheter is used for IV medicines and fluids, hemodialysis, apheresis, frequent blood tests and parenteral nutrition. It gives long-term access to a large vein without repeated needle sticks. [1]
How long can a tunneled catheter stay in?
A tunneled catheter can stay in place for months or even years. Some people use it short-term while waiting for a long-term option, such as a dialysis fistula or graft. [1]
Is a port the same as a tunneled catheter?
A subcutaneous port is one of the two types of tunneled catheter. Unlike a cuffed tunneled catheter, the port sits fully under the skin and is reached with a special needle. [1]
Does getting a tunneled catheter hurt?
Getting a tunneled catheter should not be painful during the procedure because a local anesthetic numbs the area first. The procedure is usually done in an operating room to lower infection risk. [1]
Can you shower or swim with a tunneled catheter?
With a cuffed tunneled catheter you can shower or bathe, but the line must never go underwater. With a port, you can bathe, shower and swim normally once your provider says it's safe. [1]
Where is a tunneled catheter placed?
A tunneled catheter is placed in the internal jugular vein in the neck, the subclavian vein near the collarbone or the femoral vein near the groin. Ports use only the neck or collarbone veins. [1]
What are the signs of a tunneled catheter problem?
Signs of a tunneled catheter problem include pain, redness, swelling, fever, malaise, vomiting or stiffness at the site. A cracked, split or shifted line also needs a call to your provider right away. [1]
Who should change a tunneled catheter dressing?
Only healthcare providers should change a tunneled catheter dressing — never you or your family. Your part is to wash your hands first and check daily that the dressing is clean, dry and undamaged. [1]
How is a tunneled catheter removed?
Removal is usually a short procedure with numbing medicine. A cuffed catheter may need a small cut to free the cuff, and a port is taken out through a small incision.
How often does a tunneled catheter need flushing?
It depends on the type of catheter and how often it is used. Your care team will give you a flushing schedule, and ports not in regular use still need routine flushes.
Further reading
Flick AI, Winters R. Vascular Tunneled Central Catheter Access. In: StatPearls. Treasure Island (FL): StatPearls Publishing. Last updated July 4, 2023. PMID 32491546. https://www.ncbi.nlm.nih.gov/books/NBK557614/
Kehagias E, Galanakis N, Tsetis D. Central venous catheters: Which, when and how. Br J Radiol. 2023;96(1151):20220894. PMID 37191031. https://doi.org/10.1259/bjr.20220894
Cancer Research UK. Central lines. Cancer Research UK. Last updated May 16, 2024. https://www.cancerresearchuk.org/about-cancer/treatment/chemotherapy/how-you-have/into-your-vein/central-lines
OncoLink Team. Central Line Care. OncoLink. Last updated July 12, 2024. https://www.oncolink.org/cancer-treatment/hospital-helpers/central-lines-and-care/central-line-care
Related Reading
Non-Tunneled Central Venous Catheter: Uses, Placement and Care explains non-tunneled central venous catheters.
Peripheral IV (PIVC): Uses, Placement and Risks explains peripheral IV lines.
References
Cleveland Clinic. Tunneled Catheter (Tunneled CVC): Definition & Types. Cleveland Clinic. Last updated April 27, 2026. https://my.clevelandclinic.org/health/treatments/tunneled-catheter
Shim DJ, Kim ET, Lee JH, et al. Tunneled Peripherally Inserted Central Catheters and Bloodstream Infection: A Systematic Review and Meta-Analysis. Cardiovasc Intervent Radiol. 2026;49(1):9-16. PMID 41331124. https://doi.org/10.1007/s00270-025-04289-z
Neville JJ, Aye HM, Hall NJ. Tunnelled external versus implanted port central venous catheters in paediatric oncology: a systematic review and meta-analysis. Arch Dis Child. 2023;108(12):975-981. PMID 37491140. https://doi.org/10.1136/archdischild-2023-325789
Zheng YL, Wang Y, Qi SP, et al. Comparison of catheter-related bloodstream infection between peripherally inserted central catheters and tunneled central venous catheters in patients receiving home parenteral nutrition: a meta-analysis. Front Nutr. 2026;13:1742418. PMID 41783822. https://doi.org/10.3389/fnut.2026.1742418
Disclaimer
This article is for educational purposes only and is not medical advice. Always follow the instructions of your own healthcare provider about your catheter, and seek urgent care if you have signs of a serious problem.
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