Anticoagulation Changes and Biochemical Signals Preceding Hospital-Acquired Infections in Pediatric Extracorporeal...

Area of Science:

• Pediatric critical care medicine
• Infectious disease epidemiology
• Extracorporeal life support

Background:

• Hospital-acquired infections (HAIs) are significant complications in pediatric patients requiring extracorporeal membrane oxygenation (ECMO) and continuous renal replacement therapy (CRRT).
• Traditional inflammatory markers like C-reactive protein (CRP) and procalcitonin (PCT) are often unreliable for detecting infections in these patients.
• Coagulopathy is common in sepsis and extracorporeal life support (ELS), but its potential as an early infection signal on ELS has not been investigated.

Purpose of the Study:

• To investigate whether coagulopathy and extracorporeal circuit instability can serve as early indicators of hospital-acquired infections (HAIs) in pediatric patients undergoing ELS.
• To compare traditional inflammatory markers with coagulation parameters and circuit events in identifying HAIs.

Main Methods:

• A single-center, retrospective, propensity-matched case-control study was conducted.
• 62 pediatric patients with 85 HAIs were compared to 169 matched controls without HAIs.
• Data on ECMO circuit changes, anticoagulation variability (heparin and bivalirudin adjustments), absolute neutrophil count (ANC), CRP, PCT, and white blood cell count were analyzed.

Main Results:

• Patients with HAIs exhibited significantly more ECMO circuit changes (20 vs. 3, p < 0.001) and greater anticoagulation variability.
• Increased adjustments of heparin and bivalirudin were noted in infected patients on CRRT and ECMO.
• Absolute neutrophil count (ANC) was higher in infected patients (7.0×10^3/µl vs. 4.8×10^3/µl, p = 0.003), while CRP, PCT, and white blood cell counts did not differ significantly.

Conclusions:

• Anticoagulation variability and ECMO circuit instability may represent early physiological signals of HAIs in pediatric ELS patients.
• These findings suggest that monitoring coagulation parameters and circuit events could enhance early infection detection alongside traditional laboratory tests.
• Prospective, multicenter validation is warranted to confirm these potential early infection markers.