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Uric acid excretion in normal children

F B Stapleton, M A Linshaw, K Hassanein

    The Journal of Pediatrics
    |June 1, 1978
    PubMed

    Insights

    Urinary uric acid excretion and serum levels rise during childhood. Fractional excretion and clearance of uric acid decrease with age, suggesting tubular maturation in children.

    Area of Science:

    • Pediatric Nephrology
    • Renal Physiology
    • Uric Acid Metabolism

    Background:

    • Uric acid is a key metabolic byproduct.
    • Understanding its excretion and clearance is vital for pediatric kidney health.
    • Normative data in children are essential for diagnosing renal abnormalities.

    Purpose of the Study:

    • To establish standard values for urinary uric acid excretion and clearance in healthy children.
    • To investigate the developmental changes in uric acid handling throughout childhood.
    • To explore the relationship between age, filtered uric acid load, and tubular function.

    Main Methods:

    • Recruitment of 95 normal, nonhospitalized children.
    • Measurement of urinary uric acid excretion.
    • Calculation of serum uric acid values, fractional excretion, and clearance.

    Main Results:

    • Urinary uric acid excretion and serum uric acid values increase with age in children.
    • Fractional excretion and clearance of uric acid are higher in early childhood compared to adult norms.
    • Despite increased filtered uric acid load, fractional excretion and clearance progressively decline with advancing age.

    Conclusions:

    • Tubular maturation, involving decreased secretion or increased reabsorption of uric acid, occurs during childhood.
    • These findings highlight significant developmental changes in renal uric acid handling.
    • Standard values are crucial for assessing pediatric renal function related to uric acid.

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