Unit
- CLABSI definition: A laboratory-confirmed bloodstream infection occurring in a patient with a central line at the time of infection or within 48 hours before onset, not related to an infection at another site. This definition from the National Healthcare Safety Network standardizes surveillance across facilities.
- Central line criteria: A central line is a catheter inserted into a great vessel such as the subclavian, internal jugular, or femoral vein, with the tip terminating at or near the heart. This includes peripherally inserted central catheters and tunneled catheters.
- Laboratory confirmation: Requires at least one positive blood culture with a recognized pathogen, or two or more positive cultures with common skin contaminants like coagulase-negative staphylococci, along with signs of infection such as fever or hypotension.
- Exclusion criteria: If the bloodstream infection is clearly secondary to another documented infection, it is not classified as CLABSI. This distinction is critical for accurate surveillance and to avoid misattribution of infections to central lines.
- Surveillance scope: CLABSI monitoring typically includes all adult and pediatric intensive care units, but may extend to other wards with central line use. Many hospitals now track device days and infection rates per 1,000 line-days.
- Clinical significance: CLABSI increases patient morbidity, prolongs hospital stays by an average of 7 to 21 days, and contributes to excess healthcare costs. It is associated with a mortality rate of 12 to 25 percent in critically ill populations.
- Preventable nature: Research indicates that a substantial proportion of CLABSIs are preventable through proper insertion and maintenance protocols. The CDC estimates that more than half of all device-associated infections can be avoided with current evidence-based practices.
- Historical context: National efforts such as the Keystone ICU project demonstrated that systematic implementation of a central line bundle could reduce infection rates by more than 60 percent. This proof of concept spurred global adoption of prevention strategies.
- Insertion bundle components: The central line insertion bundle includes hand hygiene, maximal sterile barrier precautions, chlorhexidine skin antisepsis, optimal catheter site selection with avoidance of the femoral vein when possible, and daily review of line necessity. Adherence to all components significantly reduces infection risk.
- Maintenance bundle practices: Key maintenance strategies include daily assessment of line necessity, proper dressing changes using chlorhexidine impregnated dressings, scrubbing the hub before access, and timely replacement of administration sets. Consistent application of these practices is critical for sustaining low infection rates.
- Surveillance definitions updates: NHSN updates CLABSI definitions periodically to improve accuracy. For example, common commensals require two or more positive blood cultures drawn on separate occasions. Understanding current criteria is essential for consistent case classification and benchmarking across institutions.
Scope of Practice
Role: Infection Preventionist in a Hospital Setting
Within scope:
- Educating clinical staff on CLABSI definitions and surveillance criteria
- Reviewing medical records to identify potential CLABSI cases
- Calculating and reporting device-associated infection rates
- Collaborating with quality improvement teams on prevention initiatives
Outside scope:
- Making the final medical diagnosis of CLABSI without clinical input
- Directly performing central line insertion or maintenance procedures
- Prescribing antimicrobial therapy for suspected infections
- Altering hospital policies without administrative approval
Quick Revision
- CLABSI is a laboratory-confirmed bloodstream infection with a central line present at infection onset.
- Central lines include catheters ending near the heart in great vessels.
- Surveillance uses standardized NHSN definitions to ensure comparability.
- CLABSI is largely preventable with evidence-based insertion and maintenance practices.