Magnesium Use in Asthma Pharmacotherapy: A Pediatric Emergency Research Canada Study

Schuh S et al. – Magnesium is used infrequently in Canadian pediatric emergency departments (EDs) in acute asthma requiring hospitalization. Many of these children also do not receive frequent albuterol and ipratropium, or early corticosteroids. Significant variability in the use of these interventions was detected.

  • Retrospective medical record review at 6 EDs of otherwise healthy children 2 to 17 years of age with acute asthma.
  • Data were extracted on history, disease severity, and timing of ED stabilization treatments with inhaled albuterol, ipratropium, corticosteroids, and magnesium.
  • Primary outcome was the proportion of hospitalized children given magnesium in the ED.
  • Secondary outcome was the ED use of “intensive therapy” in hospitalized children, defined as 3 albuterol inhalations with ipratropium and corticosteroids within 1 hour of triage.

  • A total of 19 (12.3%) of 154 hospitalized children received magnesium (95% confidence interval 7.1, 17.5) versus 2 of 962 discharged patients.
  • Children given magnesium were more likely to have been previously admitted to ICU (odds ratio [OR] 11.2), hospitalized within the past year (OR 3.8), received corticosteroids before arrival (OR 4.0), presented with severe exacerbation (OR 6.1), and to have been treated at 1 particular center (OR 14.9).
  • Forty-two (53%) of 90 hospitalized children were not given “intensive therapy.”
  • Children receiving “intensive therapy” were more likely to present with severe disease to EDs by using asthma guidelines (ORs 8.9, 3.0).
  • Differences in the frequencies of all stabilization treatments were significant across centers.

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