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Renal function in infants with hyperbilirubinemia

U Broberger, A Aperia

    Acta Paediatrica Scandinavica
    |January 1, 1979
    PubMed

    Insights

    Infants with hyperbilirubinemia showed lower glomerular filtration rate (GFR) but similar conjugated plasma appearance rate (CPAH). Urinary sodium excretion was higher in these infants, indicating altered kidney function during neonatal jaundice.

    Area of Science:

    • Neonatal medicine
    • Pediatric nephrology
    • Biochemistry

    Background:

    • Neonatal hyperbilirubinemia is common and can affect various physiological systems.
    • Kidney function in infants with elevated bilirubin levels requires further investigation.

    Purpose of the Study:

    • To assess glomerular filtration rate (GFR) and conjugated plasma appearance rate (CPAH) in infants with and without hyperbilirubinemia.
    • To evaluate the sodium excretion capacity in infants with neonatal jaundice.

    Main Methods:

    • Comparison of 45 infants (term and preterm) based on serum bilirubin levels.
    • Determination of GFR and CPAH using the single injection clearance method.
    • Assessment of urinary sodium excretion after oral sodium chloride loading.

    Main Results:

    • GFR was significantly lower in infants with hyperbilirubinemia, correlating negatively with peak bilirubin levels.
    • CPAH did not differ between infants with and without hyperbilirubinemia.
    • Urinary sodium excretion was significantly higher in infants with hyperbilirubinemia.

    Conclusions:

    • Neonatal hyperbilirubinemia is associated with reduced GFR, suggesting impaired kidney filtration.
    • The ability to excrete sodium is increased in infants with hyperbilirubinemia, despite reduced GFR.
    • Further research is needed to understand the long-term implications of these renal changes.

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