The Use of Renal Biomarkers in Pediatric Cardiac Patients With Acute Kidney Injury

Area of Science:

• Pediatric Nephrology
• Cardiovascular Surgery
• Biomarker Discovery

Background:

• Acute kidney injury (AKI) affects 30-50% of pediatric cardiac surgery patients.
• Current kidney function markers (serum creatinine, urine output) are often unreliable and delay AKI prediction.
• Existing clinical guidelines rely on these delayed indicators.

Purpose of the Study:

• To explore the potential of novel biomarkers for early identification and localization of pediatric renal injury post-cardiac surgery.
• To address the limitations of current kidney function assessment methods in this vulnerable population.

Main Methods:

• Review of emerging evidence on specific renal biomarkers: neutrophil gelatinase-associated lipocalin, cystatin C, interleukin-18, kidney injury molecule 1, and liver-type fatty acid-binding protein.
• Consideration of age- and sex-dependent reference values for biomarkers.
• Evaluation of the impact of cardiopulmonary bypass on endogenous biomarker concentrations.

Main Results:

• Novel biomarkers show potential for improved identification of pediatric renal injury.
• Urine sample analysis offers advantages over blood sampling, particularly in neonates.
• Age- and sex-related variations and cardiopulmonary bypass effects require further investigation for accurate interpretation.

Conclusions:

• Emerging biomarkers may offer superior early detection of AKI in pediatric cardiac surgery patients.
• Urine-based biomarker measurement is advantageous, especially for neonates.
• Further research is needed to establish age-dependent reference ranges and understand pharmacokinetic interactions for these biomarkers.