How long a central line can stay in place depends entirely on the type. A standard non-tunneled central venous catheter is designed for about two to three weeks. A PICC line can remain for up to three months. Tunneled catheters and implanted ports can last for years. None of these devices have a fixed expiration date that requires automatic replacement, though. The CDC explicitly recommends against routine replacement on a schedule, stating that a central line should stay in place as long as it’s working and not causing problems.
Duration by Catheter Type
Central lines come in several varieties, each engineered for a different timeframe. The differences in design, placement, and materials directly determine how long each one is expected to last.
Non-tunneled central venous catheters are the most common short-term option. They’re inserted directly into a large vein in the neck, chest, or groin and are intended for a treatment duration of two to three weeks. These are the lines most often placed in hospital settings for things like IV medications, fluid resuscitation, or monitoring.
PICC lines (peripherally inserted central catheters) are placed through a vein in the upper arm and threaded to a larger vein near the heart. They’re designed for medium-to-long-duration therapy, commonly lasting up to three months. In practice, most PICC lines stay in for one to four weeks, with a median dwell time around 19 to 20 days in ICU settings, though some extend well beyond 30 days.
Tunneled catheters (such as Hickman or Broviac lines) are threaded under the skin before entering a vein, which creates a barrier against infection. They’re intended for use lasting more than one month and can function for years. A large study tracking tunneled hemodialysis catheters over 22 years found that among catheters lasting longer than one year, the median duration was 504 days and the longest-surviving catheter stayed in place for over 10 years (3,802 days). Researchers noted these devices are “exceptionally durable,” with physical breakdown rarely being a reason for removal.
Implanted ports (port-a-caths) are fully placed beneath the skin with a small reservoir that sits under the chest wall. Because they’re completely internal, they carry the lowest complication rate of any central line type (about 0.52 complications per 1,000 catheter-days, compared to 1.08 for standard central lines and 2.02 for PICCs). Ports can remain functional for years and are commonly used in cancer treatment, where patients may need intermittent chemotherapy over long periods.
Why There’s No Fixed Replacement Schedule
You might assume that central lines need to be swapped out at regular intervals to prevent infection. They don’t. The CDC reviewed multiple randomized trials comparing scheduled catheter replacement (every seven days) with replacement only when needed, and found no difference in infection rates between the two approaches. A meta-analysis of 12 trials reached the same conclusion for guidewire exchanges, where a new catheter is threaded over a wire in the same location.
The current CDC recommendation is straightforward: do not routinely replace central venous catheters, PICCs, hemodialysis catheters, or pulmonary artery catheters to prevent infection. A functioning line with no signs of complications stays in place until treatment is complete or a problem develops.
How Infection Risk Changes Over Time
While scheduled replacement doesn’t help, the risk of a bloodstream infection does climb the longer a central line stays in. The pattern is fairly consistent across studies: the first week carries relatively low risk. By day 14, the risk roughly triples compared to the first week. One long-term observational study found that bloodstream infections occurred at a mean of 9.8 days, with risk climbing from less than 1% at day 7 to 3.6% at day 14.
This rising risk is why clinicians assess daily whether a central line is still needed. The single most effective way to prevent a central line infection isn’t replacing the catheter on a schedule. It’s removing it as soon as it’s no longer necessary. For short-term lines in hospital settings, this daily assessment is standard practice.
Complication rates also vary by catheter type. PICCs have the highest overall complication rate at about 2.02 per 1,000 catheter-days, driven largely by clotting issues and non-thrombotic problems like line malfunction. Implanted ports have the lowest at 0.52 per 1,000 days. Tunneled and non-tunneled central lines fall in between, both around 1.0 per 1,000 days.
What Triggers Early Removal
A central line comes out before its intended course is finished when complications develop. The most common reasons include signs of bloodstream infection (fever, chills, redness or drainage at the insertion site), blood clots that block the catheter, and mechanical problems like a cracked or leaking line. Notably, the CDC advises against pulling a line based on fever alone, since fevers often have other causes. Removal for suspected infection depends on the full clinical picture.
Physical damage to the catheter, resistance during flushing, or sudden breathing difficulties during line use are all signals that warrant immediate attention. For tunneled catheters that have been in place for months or years, the most common reason for eventual removal is that the patient no longer needs the line, not that the device itself has failed.
Maintenance for Long-Term Lines
Ports and tunneled catheters that stay in place for months or years require regular flushing to prevent blood clots from blocking the line. Manufacturers recommend monthly flushes for implanted ports when they’re not being actively used. However, some cancer centers have tested longer intervals. One study compared monthly, every-four-to-eight-week, and every-12-week flushing schedules and found that 89% of patients preferred the 12-week interval, which appears to be a growing option at some treatment centers.
Tunneled catheters used for hemodialysis are flushed after every dialysis session, typically three times per week, so maintenance is built into the treatment itself. For any long-term central line, keeping the site clean and dry, watching for redness or swelling, and reporting any unusual symptoms are the key things you can do between clinical visits to help the line last as long as it’s needed.