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Fluid and electrolyte disorders in the newborn: sodium and potassium

Marta Suarez-Rivera, Melvin Bonilla-Felix1

  • 1Department of Pediatrics, University of Puerto Rico - Medical Sciences Campus, PO Box 365067, San Juan, PR 00936-5067, USA.

Current Pediatric Reviews
|August 5, 2014
PubMed

Insights

Premature infants often experience electrolyte imbalances due to immature kidney function and medical factors. Careful assessment of fluid status and urine tests is crucial for diagnosis and treatment.

Area of Science:

  • Neonatal physiology
  • Pediatric nephrology

Background:

  • Renal tubular development continues postnatally in both full-term and preterm infants.
  • Increased survival of preterm infants has led to a rise in electrolyte and water balance issues.

Purpose of the Study:

  • To highlight the common causes of sodium and potassium imbalances in preterm infants.
  • To emphasize the importance of accurate diagnosis and treatment strategies.

Main Methods:

  • Review of factors contributing to electrolyte disturbances in neonates.
  • Discussion of diagnostic parameters including volume status, urine electrolytes, and osmolality.

Main Results:

  • Immature kidney function, including impaired water reabsorption and mineralocorticoid response, contributes to imbalances.
  • High sodium excretion, perinatal complications, and medications (diuretics, indomethacin, amphotericin B) are significant factors.
  • Electrolyte imbalances are prevalent in preterm infants.

Conclusions:

  • Diagnosis and management require thorough assessment of volume status.
  • Urine electrolyte and osmolality measurements are essential for guiding treatment.
  • Understanding these factors is critical for improving care in preterm neonates.

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