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Do we use too much antenatal betamethasone?

Amanda Skoll1, Ema Ferreira, Lyne Pedneault

  • 1Ste-Justine Hospital, University of Montreal, Montreal, QC, Canada.

Journal of Obstetrics and Gynaecology Canada : JOGC = Journal D'Obstetrique Et Gynecologie Du Canada : JOGC
|August 28, 2002
PubMed
Summary

Antenatal betamethasone is used for threatened preterm birth, but optimal timing for benefit is hard to predict. This review suggests a cautious approach to its liberal use is warranted.

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Area of Science:

  • Obstetrics
  • Neonatal care
  • Pharmacology

Background:

  • Antenatal corticosteroids, like betamethasone, are crucial for fetal lung maturation.
  • Their administration is standard in cases of threatened preterm birth to reduce neonatal morbidity.
  • The optimal timing and dosing regimen remain subjects of ongoing clinical evaluation.

Purpose of the Study:

  • To review and rationalize the use of antenatal betamethasone for threatened preterm birth.
  • To assess the effectiveness of current dosing protocols, including repeat doses.
  • To evaluate the timing of delivery relative to treatment for optimal therapeutic benefit.

Main Methods:

  • Retrospective chart review of patients receiving antenatal betamethasone.
  • Analysis of initial and repeat dosing strategies.

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  • Evaluation of delivery timing, gestational age, and hospitalization status.

    • Main Results:

    • Only 25% of patients received "optimal" treatment (delivery within 1 week of initial treatment, prior to 34 weeks).
    • A significant proportion of patients receiving repeat doses delivered after 34 weeks, suggesting suboptimal timing.
    • Potential underutilization of betamethasone was noted in a small percentage of cases.

    Conclusions:

    • Predicting delivery timing for optimal antenatal betamethasone benefit is challenging.
    • Balancing the desire for fetal benefit against potential overuse is essential.
    • The study's findings led to a significant decrease in antenatal betamethasone use in the unit.