Neonatal Kidney Function, Injury and Drug Dosing: A Contemporary Review

Area of Science:

• Neonatal medicine
• Pediatric nephrology
• Critical care

Background:

• Estimating glomerular filtration rate and assessing renal impairment in neonates is challenging.
• Serum creatinine and urine output are key indicators but are affected by rapid postnatal adaptation.
• Current definitions of acute kidney injury (AKI) in neonates do not fully account for these adaptive processes.

Purpose of the Study:

• To provide a perspective on neonatal kidney function and AKI.
• To discuss the relationship between fluid balance, creatinine levels, and AKI management.
• To highlight the implications of AKI for drug dosing and long-term outcomes in neonates.

Main Methods:

• Literature review and synthesis of current knowledge on neonatal kidney function and AKI.
• Discussion of diagnostic challenges, including the limitations of serum creatinine and urine output.
• Exploration of management strategies for neonatal AKI, considering fluid balance and nutritional needs.

Main Results:

• Serum creatinine is not always a reliable indicator of renal function in neonates due to postnatal adaptation.
• Accurate measurement of urine output can be difficult in critically ill neonates.
• Definitions and management of neonatal AKI require further refinement to account for unique physiological changes.

Conclusions:

• Accurate diagnosis and documentation of neonatal AKI are crucial for appropriate follow-up care.
• Understanding the complexities of neonatal kidney function is essential for effective management and improved patient outcomes.
• Further research is needed to better describe predictors of recovery and long-term outcomes after neonatal AKI.