How Long Can a Central Line Stay in Place: By Type

Every type of central venous catheter has a different expected lifespan, ranging from roughly two weeks for a basic non-tunneled line to several years for an implantable port. The right device depends on how long treatment will last, what is being infused, and how the patient’s body responds over time. What matters just as much as these design-based timelines, though, is that no central line has a fixed expiration date stamped on it. Guidelines explicitly recommend against routine replacement on a schedule, because the infection risk from a new insertion can outweigh the risk of leaving a well-functioning line in place.

Non-Tunneled Central Venous Catheters

A non-tunneled CVC is the workhorse of acute care. It goes directly through the skin into a large vein, usually the internal jugular, subclavian, or femoral, and it is typically indicated when venous access is needed for about two to three weeks.¹ These lines are relatively quick to place, often at the bedside in an ICU or emergency department, and they do not involve a surgical tunnel or implanted reservoir. That simplicity is also their limitation: because the catheter exits the skin at the same point it enters the vein, bacteria from the skin surface have a short, direct path to the bloodstream.

In practice, many non-tunneled lines come out well before the three-week mark. A prospective study of non-tunneled hemodialysis catheters found a median dwell time of 12 days, with about 40% of catheters remaining beyond 15 days. All bloodstream infections in that study occurred within the first 15 days of insertion.² That does not mean 15 days is a hard cutoff. It means the infection clock starts ticking immediately, and clinicians weigh each extra day against the clinical need. If treatment is expected to run longer than a few weeks, the usual move is to transition to a tunneled catheter or a PICC.

Peripherally Inserted Central Catheters (PICCs)

PICCs are threaded into a vein in the upper arm and advanced until the tip sits in a large central vein near the heart. They bridge the gap between short-term and long-term access, and they are the default choice for many outpatient infusion therapies, including weeks-long courses of IV antibiotics or chemotherapy cycles. Most clinical references describe PICCs as suitable for weeks to months of use, and real-world dwell times reflect that range. A cohort study in hematology patients found a median PICC dwell time of 26 days, with some lines lasting well over a year.³

Complications are the main reason PICCs come out early. A prospective study tracking nearly 200 PICCs found an overall complication rate of about 30%, with problems including occlusion, accidental dislodgement, infection, and blood clots. The average time to a complication was around 16 days.⁴ That sounds alarming, but it includes minor issues like partial pull-outs and clogged lumens that can sometimes be managed without removing the line. Bloodstream infections, the complication everyone worries about most, occurred in under 2% of those PICCs.

In neonates, PICC dwell times tend to be shorter, and infection risk climbs faster. A multicenter study of nearly 5,000 neonatal PICCs found that infection risk rose during the first two weeks after insertion and stayed elevated for as long as the catheter remained. Gram-negative infections were especially overrepresented in lines left in for more than 50 days.⁵ For babies, the general approach is to pull the PICC as soon as possible once treatment wraps up, rather than leaving it in “just in case.”

Tunneled Central Venous Catheters

Tunneled catheters, such as Hickman or Broviac lines, are designed for longer stays. The catheter is threaded under the skin for several centimeters before entering the vein, creating a subcutaneous tunnel. Most tunneled lines have a small Dacron cuff that sits inside that tunnel. Over a few weeks, the body’s tissue grows into the cuff, anchoring the catheter and forming a physical barrier against bacteria migrating along the outside of the line.⁶ Until that tissue ingrowth is complete, a securing suture holds the catheter in place.

Because of the tunnel and the cuff, these lines can remain functional for months. They are a common choice for patients who need frequent blood draws, prolonged chemotherapy, or total parenteral nutrition. Exact dwell times vary widely based on the patient and the clinical situation, but it is not unusual for tunneled catheters to stay in for three to six months or longer, provided they function well and remain free of infection.

Tunneled Hemodialysis Catheters

Hemodialysis catheters deserve their own discussion because the demands placed on them are extreme. They carry blood out of the body, through a dialysis machine, and back again, typically three times a week. Tunneled dialysis catheters are the preferred option when a patient needs dialysis but does not yet have a mature arteriovenous fistula or graft, or when those options are not feasible.

A single-institution analysis spanning 22 years examined tunneled hemodialysis catheters that remained in place for more than a year. The longest-dwelling catheter in that cohort lasted over ten years. The median dwell time among this long-dwelling subset was about 504 days, and the overall complication rate requiring removal or exchange was roughly 1.7 per 1,000 catheter-days. External component breakage was the most common mechanical problem, affecting about 6% of catheters that lasted beyond a year, compared to under 1% of those removed sooner.⁷ That eightfold increase in breakage over time makes sense: the catheter endures constant mechanical stress from repeated use and patient movement.

In pediatric patients, the picture is somewhat different. A study of children and adolescents on hemodialysis found that uncuffed (non-tunneled) catheters had a median survival of 31 days, while cuffed (tunneled) catheters had a one-year survival rate of about 27%.⁸ Children are harder on catheters for several reasons: they grow, they move unpredictably, and their smaller veins make placement and long-term patency more challenging.

Totally Implantable Ports

Implantable ports, often called port-a-caths, sit entirely beneath the skin. A small reservoir is placed in a surgically created pocket, usually on the chest wall, and a catheter runs from the port into a central vein. To use the port, a nurse pushes a special needle through the skin and into the reservoir’s self-sealing membrane. When not in use, there is nothing external at all, which drastically reduces the day-to-day infection risk and gives patients the freedom to swim, shower, and exercise normally.

Ports are built for the long haul. In a large series of 3,000 patients, the mean duration a port remained in place was nearly four years, with some lasting over six years.⁹ Complications occurred in under 10% of patients and included infection, blood clots, pain, and mechanical issues. A prospective study of 333 ports found late complication rates that were strikingly low on a per-day basis: catheter-related bloodstream infections occurred at a rate of about 0.1 per 1,000 days of use, and venous thrombosis at about 0.06 per 1,000 days.¹⁰ A similar study of 178 ports connected to Groshong catheters reported comparable numbers, with more than three-quarters of devices still functioning when the study closed.¹¹

The main reason ports get removed is that treatment ends. The second most common reason is infection. But because the port is sealed under the skin when not being accessed, infection rates per day of use are far lower than for any externally visible catheter. This is why ports are the preferred option for cancer patients who will need intermittent chemotherapy over many months or years.

Midline Catheters and How They Compare

Midline catheters are not technically central lines. They are inserted in the upper arm, like a PICC, but the tip stops in a peripheral vein rather than advancing into a central vein. They typically stay in for up to four weeks and are increasingly used as an alternative to PICCs when central venous access is not strictly necessary.¹² They are worth mentioning here because clinicians often choose between a midline and a PICC based on how long treatment will last, and patients frequently ask about the difference.

A large study comparing midlines to PICCs for outpatient antibiotic therapy found that midlines were associated with roughly half the risk of major complications. For lines kept in 14 days or fewer, midlines had a major complication rate under 1% compared to over 5% for PICCs.¹³ However, a meta-analysis of randomized trials found that PICCs actually had fewer total complications and longer dwell times, while midlines were more likely to be removed prematurely.¹⁴ The practical takeaway: if you need venous access for a couple of weeks and your medication can be given peripherally, a midline may be safer. If treatment will run longer or requires central venous delivery, a PICC is the better fit.

Why Guidelines Say Not to Replace Lines on a Schedule

One of the most counterintuitive aspects of central line management is that routine scheduled replacement does not reduce infection. The CDC’s prevention guidelines are explicit: central venous catheters, including PICCs and hemodialysis catheters, should not be routinely replaced as a strategy to prevent bloodstream infections, in either adults or children.¹⁵ The reasoning is straightforward. Every new insertion carries its own risks: bleeding, pneumothorax, arterial puncture, and the fresh wound itself becomes a new entry point for bacteria. As long as a line is working properly and shows no signs of infection or mechanical failure, leaving it alone is safer than swapping it out.

This means the answer to “how long can my line stay in?” is ultimately “as long as it works and does not cause problems.” The type-specific timeframes discussed above are guidelines for initial device selection, not expiration dates. A PICC placed for a two-week antibiotic course that ends up being needed for six weeks does not automatically need replacement at some predetermined mark.

How Infection Risk Evolves Over Time

The relationship between dwell time and infection is not as simple as “longer equals more dangerous.” In neonatal intensive care, all bloodstream infections associated with central lines were observed after a dwell time of at least five days, with rates climbing after nine days.¹⁶ That initial ramp-up makes biological sense: bacteria need time to colonize the catheter surface and establish themselves in sufficient numbers to cause a bloodstream infection.

But the risk does not keep rising linearly forever. In the hematology PICC cohort mentioned earlier, infection rates appeared higher in weeks two through eight compared to the first two weeks, but once researchers adjusted for other factors like stem cell transplant status, the difference across dwell time categories was not statistically significant.³ What this suggests is that the patient’s underlying condition and immune status often matter more than the calendar.

Where the Line Goes In Matters

The insertion site has a measurable effect on how long a central line lasts without complications. A study comparing subclavian, internal jugular, and femoral sites found that catheter colonization was substantially higher at the femoral and jugular sites compared to the subclavian site.¹⁷ The groin area is warm, moist, and near the perineum, all of which promote bacterial growth. The subclavian site, tucked below the collarbone, is generally cleaner and easier to keep dressed properly.

In pediatric ICU patients, a three-year analysis found that right internal jugular insertion was associated with significantly lower odds of bloodstream infection compared to femoral placement.¹⁸ Clinicians choose insertion sites based on anatomy, urgency, and patient factors, but when there is a choice, avoiding the femoral vein for anything longer than a few days is a widely followed principle.

Catheter Materials and Longevity

Central lines are made from either silicone or polyurethane, and the material affects durability and complication profile in different ways. A comparison of port catheters found that polyurethane lines were more prone to infection and blood clot formation, while silicone catheters tended toward reduced mechanical stability.¹⁹ A study of tunneled infusion catheters quantified the trade-off: silicone catheters broke at a rate of 8% versus 0% for polyurethane, but there was no significant difference in overall functional survival between the two materials.²⁰

The body also responds to any foreign material placed inside a vein. Within a week of insertion, a sheath of cells, fibrin, and smooth muscle begins forming around the catheter surface. By two weeks, this sheath shows active cell proliferation. After a month or more, it matures into a collagen-rich layer that essentially integrates the catheter into the vessel wall.²¹ This fibrin sheath is a double-edged sword. It can protect against some bacterial colonization, but it can also trap organisms, cause catheter malfunction, and make removal more difficult the longer a line stays in place.

Keeping a Line Working with Flushing and Locking

Regular flushing is one of the key interventions that extends a central line’s functional life. When blood sits in a catheter lumen, it clots. Once a clot forms, the line stops drawing or infusing, and it may need to be replaced. Flushing with saline pushes blood out and keeps the lumen clear. When a catheter is not in active use, it is “locked” by filling the lumen with a solution that sits there between accesses.²²

For decades, heparin was the standard locking solution because of its anticoagulant properties. But multiple systematic reviews have found that normal saline is equally effective at maintaining catheter patency. A meta-analysis pooling data from over 1,600 patients found no significant advantage of heparin over saline for keeping central venous catheters open.²³ A separate meta-analysis reached the same conclusion and added that heparin showed no advantage for secondary outcomes like thrombosis or bloodstream infection either.²⁴ Given that heparin carries its own risks, including a rare but serious immune reaction called heparin-induced thrombocytopenia, many institutions have shifted to saline-only flushing protocols for most central lines.

Pediatric Central Lines Last Differently

Children are not small adults when it comes to central line dwell times. Younger children face higher complication rates, which often means shorter functional catheter life. A study examining risk factors for PICC complications in children found that those younger than one year had significantly higher complication rates than older children, with the biggest reduction in risk seen in teenagers.²⁵ Infants move erratically, their veins are tiny, and their skin is more fragile, all of which make accidental dislodgement and infiltration more common.

When a central line does stay in a child for a very long time, removal itself can become complicated. A systematic review of complications during central venous access device removal in children identified dwell time beyond two years as a risk factor for problems during extraction, including retained catheter fragments. Growth during the time a device is in place, reflected by increased body weight, was another independent risk factor.²⁶ This is one reason pediatric teams try to remove long-term lines promptly once treatment is complete, rather than leaving them “just in case.”

Central Lines at Home Versus in the Hospital

A growing number of patients manage central lines at home for outpatient infusion therapy. The infection landscape looks different outside the hospital. Home-infusion central line bloodstream infection rates have been documented at roughly 0.2 per 1,000 catheter-days, compared to about 0.9 per 1,000 catheter-days in acute-care hospitals.²⁷ The lower rate likely reflects a combination of factors: home patients tend to be more medically stable, they are exposed to fewer hospital-acquired organisms, and their lines are accessed less frequently.

For patients going home with a PICC or a port, the practical implication is reassuring. A well-maintained line in a home setting can function safely for extended periods. The key is consistent flushing, proper dressing changes, and knowing the signs that something is wrong: redness, swelling, or tenderness at the site; fever or chills during or after infusion; or difficulty flushing the line.

Cost Considerations in Choosing a Device

Device selection is not purely a medical decision. Cost-effectiveness analyses have found that PICCs, while more expensive upfront than standard centrally inserted catheters, tend to save money overall because they result in fewer complications and replacements. One analysis found that the higher initial cost of a PICC was offset by avoiding catheter-related complications, with the PICC strategy coming out cost-effective in the majority of modeled scenarios.²⁸ A European study of lines placed specifically for parenteral nutrition found that PICCs had longer average dwell times and lower overall costs compared to standard CVCs, with the vast majority of simulated scenarios favoring PICCs on both cost and effectiveness measures.²⁹

These economics help explain why PICCs have become so popular over the past two decades. But cost-effectiveness depends on the expected duration of use. For a patient who will need central access for only a few days in the ICU, a straightforward non-tunneled CVC is the sensible choice. For someone facing months of intermittent chemotherapy, the upfront investment in a port pays for itself many times over through reduced complications, fewer emergency room visits, and better quality of life.