Factors Associated With Changes in Magnesium Levels in Asymptomatic Neonates: A Longitudinal Analysis

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Assessment and Evaluation of the High Risk Neonate: The NICU Network Neurobehavioral Scale
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Yogesh Mehta1, Charudatta Shitole1, Maninder Singh Setia2

  • 1Department of Pediatrics, Dr. L H Hiranandani Hospital, Mumbai, India.

Iranian Journal of Pediatrics
|February 6, 2016
PubMed

Insights

Hypomagnesemia is common in asymptomatic newborns but typically resolves within three days without intervention. Monitoring magnesium levels is advised, but supplementation is unnecessary for these infants.

Area of Science:

  • Neonatal medicine
  • Pediatric endocrinology
  • Biochemistry

Background:

  • Hypomagnesemia in neonates and infants can manifest as seizures and psychomotor delay.
  • Early detection and understanding of magnesium (Mg) fluctuations are crucial for neonatal health.
  • Asymptomatic hypomagnesemia may be prevalent and requires careful evaluation.

Purpose of the Study:

  • To evaluate changes in serum magnesium levels during the first three days of life in neonates.
  • To identify factors associated with magnesium level variations in the neonatal period.
  • To assess the need for magnesium supplementation in asymptomatic neonates with hypomagnesemia.

Main Methods:

  • A cohort of 50 clinically asymptomatic neonates was monitored.
  • Serum magnesium levels, gestational age, birth weight, length, and ponderal index were analyzed.
  • Random effects models were used for longitudinal data analysis.

Main Results:

  • 31% of neonates presented with hypomagnesemia (< 1.6 mg/dL) on day one, normalizing by day three (P < 0.001).
  • Lower serum Mg levels at birth correlated with increased neonatal weight, even after adjusting for intrauterine growth retardation (IUGR).
  • Serum Mg levels increased significantly per day (0.14 mg/dL), with a higher rate in low birth weight infants.

Conclusions:

  • Asymptomatic neonates exhibit a high prevalence of hypomagnesemia, which resolves spontaneously within three days.
  • Magnesium supplementation is not required for clinically asymptomatic neonates.
  • Regular monitoring of magnesium levels is recommended, but intervention is often unnecessary.
Abstract

Keywords:
HypomagnesemiaMagnesiumSupplementation

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