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Long-term intravenous tocolytic therapy

J P Bruner1, T A Bruner, A P Sarno

  • 1Department of Obstetrics and Gynecology, Tripler Army Center, Honolulu, HI, USA.

Military Medicine
|August 1, 1997
PubMed
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Long-term intravenous tocolytic therapy, using ritodrine or magnesium sulfate, effectively prolongs gestation in women with recurrent preterm labor. This extended treatment is safe and comparable to shorter durations for fetal outcomes.

Area of Science:

  • Obstetrics and Gynecology
  • Maternal-Fetal Medicine
  • Pharmacology

Background:

  • Recurrent preterm labor poses significant risks to both mother and neonate.
  • Conventional tocolytic therapy durations may be insufficient for some patients.
  • Intravenous tocolysis is a common intervention for managing preterm labor.

Purpose of the Study:

  • To compare the efficacy and safety of long-term ( > 48 hours) versus short-term ( < 48 hours) intravenous tocolytic therapy.
  • To evaluate the impact of prolonged tocolysis on gestational age at delivery and fetal outcomes.
  • To assess the use of ritodrine hydrochloride and magnesium sulfate in managing refractory preterm labor.

Main Methods:

  • Retrospective, case-controlled study design.
  • Inclusion of 18 women requiring continuous intravenous tocolysis for > 48 hours.

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  • Comparison with a similar group of women treated in < 48 hours.
  • Analysis of tocolytic selection, dosage, interval to delivery, and fetal outcome measures.

    • Main Results:

    • Mean gestational age at diagnosis was 31 weeks for both long-term and short-term therapy groups.
    • Higher hourly dosages were required for long-term tocolytic therapy.
    • No statistically significant difference in the mean interval from therapy initiation to delivery (41 vs. 39 days).
    • Mean gestational age at delivery was 36 weeks in both groups, with no significant differences in fetal outcomes.

    Conclusions:

    • Long-term intravenous tocolytic therapy is a safe and effective strategy for prolonging gestation in women with recurrent preterm labor unresponsive to conventional treatment.
    • Extended tocolysis demonstrates comparable safety and efficacy to shorter treatment durations regarding gestational age at delivery and fetal outcomes.
    • These findings support the continued use of intravenous tocolytics for managing challenging cases of preterm labor.