The Importance of Accurately Assessing Renal Function in the Neonate and Infant

Area of Science:

• Neonatal Medicine
• Pediatric Nephrology
• Biomarkers

Background:

• Accurate assessment of renal function in neonates and infants is critical for safe drug dosing and early detection of acute kidney injuries.
• Serum creatinine (Cr) is a common marker but has limitations in neonates, being influenced by maternal renal function for the first 72 hours.
• Existing methods like serum creatinine have significant shortcomings in the neonatal population.

Purpose of the Study:

• To review current knowledge on measuring renal function in term and preterm newborns.
• To identify existing knowledge gaps in neonatal renal function assessment.
• To outline steps for addressing these knowledge gaps.

Main Methods:

• Review of existing literature on neonatal renal function assessment.
• Analysis of current biomarkers (serum creatinine, cystatin C, beta-trace protein).
• Evaluation of imaging techniques (ultrasound for renal volume).

Main Results:

• Serum creatinine is widely used but unreliable in early neonatal life.
• Novel biomarkers like cystatin C and beta-trace protein show promise.
• Renal volume by ultrasound assesses nephron endowment but not postnatal functional adaptation.

Conclusions:

• Current methods for assessing neonatal renal function are suboptimal, necessitating further research.
• Development and validation of new biomarkers and methods are required.
• Addressing knowledge gaps will improve clinical management and outcomes for neonates with kidney issues.