Etiology and outcome of acute kidney injury in children

Area of Science:

• Pediatric Nephrology
• Critical Care Medicine
• Neonatology

Background:

• Acute kidney injury (AKI) is a significant concern in pediatric populations, with varying etiologies and outcomes.
• Understanding the specific risk factors and clinical features of AKI in newborns versus older children is crucial for effective management.

Purpose of the Study:

• To define the etiology, clinical characteristics, and prognostic factors of AKI in a large pediatric cohort.
• To utilize the pediatric-modified RIFLE (pRIFLE) criteria for AKI classification and risk stratification.

Main Methods:

• A prospective, multicenter study involving 472 pediatric patients.
• Classification of AKI using pediatric-modified RIFLE (pRIFLE) criteria.
• Statistical analysis, including stepwise multiple regression, to identify independent risk factors.

Main Results:

• Hypoxic/ischemic injury and sepsis were the leading causes of AKI in both newborns and older children.
• Newborns exhibited higher mortality rates (42.6%) compared to older children (27.9%).
• Independent risk factors included mechanical ventilation, hypervolemia, congenital heart disease (CHD), and metabolic acidosis in newborns; and mechanical ventilation, hypoxia, and intrinsic AKI in older children.

Conclusions:

• AKI in pediatric patients is multifactorial, with distinct risk profiles in newborns and children.
• Mechanical ventilation and CHD are significant independent risk factors for AKI across pediatric age groups.
• The higher mortality in newborns underscores the severity and complexity of AKI in this vulnerable population.