For decades, routine central venous catheter (CVC) replacement has been embedded within many local policies, often with predetermined replacement intervals such as seven days. The rationale has always appeared intuitive: if infection risk increases over time, replacing the device at regular intervals should reduce the likelihood of complications.
Yet one of the most significant messages emerging from the World Health Organization’s (WHO) newly published guidance on CVC-associated infection prevention is that intuition and evidence do not always align. The organisation now recommends against the routine replacement of central venous catheters at fixed intervals, favouring device removal or replacement based on clinical indication instead.
This recommendation raises an important question for healthcare organisations: if routine replacement does not improve outcomes, what value is it delivering for patients or healthcare systems?
Challenging an Established Assumption
Healthcare has a long history of practices that became standard before robust evidence was available to support them. Routine CVC replacement is one such example.
Following a systematic review of the available evidence, the WHO Guideline Development Group concluded that scheduled replacement offers little evidence of benefit in reducing catheter-associated infections and may instead introduce additional procedural burden, patient inconvenience and increased resource utilisation.
This position is not emerging in isolation. The Centers for Disease Control and Prevention (CDC) has long advised against routinely replacing central venous catheters solely as a strategy to prevent infection, instead emphasising ongoing assessment of catheter necessity and prompt removal when access is no longer clinically required.
Taken together, these recommendations reflect a broader shift away from time-based interventions and towards clinically driven decision-making.
Duration Alone Is Not the Problem
One of the most enduring perceptions in vascular access has been that prolonged dwell time is the primary driver of catheter-related infection.
The evidence suggests the reality is more complex.
Catheter-related bloodstream infections are influenced by numerous factors, including insertion technique, aseptic practice, hand hygiene, dressing integrity, hub decontamination, staff training and adherence to maintenance bundles. As a result, infection risk cannot be explained by dwell time alone.
This understanding has informed international efforts to reduce central line-associated bloodstream infections (CLABSIs). Modern prevention strategies focus heavily on insertion and maintenance bundles, staff education and device surveillance, interventions that have demonstrated significant reductions in infection rates across diverse healthcare settings.
In this context, replacing a well-functioning catheter simply because a predefined number of days has elapsed may not address the factors most closely associated with infection risk.
Balancing Risk Against Risk
Every catheter replacement is itself an invasive procedure.
Although replacement is often viewed as a preventative measure, each additional insertion carries recognised risks, including vessel trauma, bleeding, malposition and other mechanical complications. WHO also highlights the potential for increased sharps exposure associated with undertaking additional procedures.
This highlights an important principle of evidence-based vascular access management: interventions intended to reduce risk should themselves demonstrate measurable benefit.
If routine replacement does not significantly improve patient outcomes, exposing patients to avoidable procedures becomes increasingly difficult to justify.
The Rise of Device Stewardship
Perhaps the most important implication of the WHO recommendation is not economic, but clinical.
High-performing vascular access services increasingly embrace the concept of device stewardship, ensuring that patients have the right device, for the right indication, for the right duration.
Within this framework, clinicians are encouraged to ask:
- Does the patient still require central venous access?
- Is the catheter functioning appropriately?
- Is there evidence of infection, thrombosis or device failure?
- Is there a clinical indication for removal or replacement?
These questions place patient need at the centre of decision-making, rather than reliance on arbitrary replacement schedules.
An Opportunity for Clinical Reflection
The publication of the WHO guideline is unlikely to trigger immediate policy changes across all organisations. Local governance arrangements, patient populations and operational considerations will continue to influence practice.
However, it does provide an opportunity for multidisciplinary discussion between intensivists, vascular access specialists, infection prevention teams and healthcare leaders.
As healthcare increasingly strives to eliminate low-value interventions and focus resources where they have the greatest impact, reviewing routine catheter replacement policies against the latest evidence appears both timely and appropriate.
The question may no longer be whether a central venous catheter has reached day seven.
Instead, the more meaningful question is whether there is a clinical reason for replacing it at all.
References
- World Health Organization. Guidelines for the prevention of bloodstream infections and other infections associated with the use of intravascular catheters. Part 2: Central venous catheters. Geneva: World Health Organization; 2026.
- O’Grady NP, Alexander M, Burns LA, Dellinger EP, Garland J, Heard SO, et al. Guidelines for the prevention of intravascular catheter-related infections. Clin Infect Dis. 2011;52(9):e162-e193.
- Morzaria P, Carle C. Should central venous catheters be routinely replaced in adults? Br J Hosp Med (Lond). 2021;82(7):1-2.
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