Hydration and Nephrolithiasis in Pediatric Populations: Specificities and Current Recommendations

Area of Science:

• Pediatric Nephrology
• Urology
• Metabolic Disorders

Background:

• Renal lithiasis (kidney stones) is less common in children than adults.
• Causes include genetic abnormalities, infections, and complex uropathies, often with co-occurring urological and metabolic issues.
• Recent trends show a rising incidence of pediatric urolithiasis, particularly calcium oxalate stones.

Purpose of the Study:

• To synthesize current knowledge on pediatric nephrolithiasis.
• To highlight the critical role of hydration in managing childhood kidney stones.
• To emphasize the importance of metabolic assessment and nutritional factors.

Main Methods:

• Review of current literature on pediatric urolithiasis.
• Analysis of etiological factors, including genetic and metabolic origins.
• Emphasis on hydration targets and fluid intake recommendations.

Main Results:

• Metabolic and environmental factors, alongside hydration, influence stone component epidemiology.
• A complete metabolic assessment is recommended after the first stone in a child.
• Increased water intake (2-3 L/m²/day) is vital, aiming for urine density <1010 or <300 mOsm/L.

Conclusions:

• Hydration and nutrition are fundamental to managing pediatric urolithiasis, regardless of the underlying cause.
• Systematic metabolic evaluation is key for early diagnosis and tailored treatment.
• While specific treatments exist, lifestyle modifications like hydration remain the cornerstone of care.