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Related Experiment Videos

Tocolysis during cervical ripening with vaginal PGE2.

G M Insull1, I Cooke, I Z MacKenzie

  • 1Nuffield Department of Obstetrics and Gynaecology, John Radcliffe Hospital, Headington, Oxford.

British Journal of Obstetrics and Gynaecology
|February 1, 1989
PubMed
Summary

Pretreating with oral salbutamol before prostaglandin E2 (PGE2) for cervical ripening in primigravidae resulted in less established labor but significant cervical improvement. This method offers better control over labor induction and delivery timing.

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Area of Science:

  • Obstetrics and Gynecology
  • Reproductive Medicine

Background:

  • Cervical ripening is crucial for labor induction in term pregnancies.
  • Unripe cervices pose challenges for successful labor induction and vaginal delivery.
  • Prostaglandin E2 (PGE2) is commonly used for cervical ripening.

Purpose of the Study:

  • To evaluate the efficacy and safety of oral salbutamol pretreatment before PGE2 administration for cervical ripening in primigravidae.
  • To assess the impact on labor induction, cervical change, and delivery outcomes.
  • To determine if this combined approach improves control over uterine activity and delivery timing.

Main Methods:

  • Forty-two primigravidae with unripe cervices (modified Bishop score ≤ 5) were included.
  • Patients received 8 mg oral salbutamol 30 minutes prior to vaginal 5 mg PGE2 administration.

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  • Labor onset, cervical modification, and delivery parameters were monitored.

    • Main Results:

    • Only 19% of patients progressed to established labor post-treatment, lower than previous reports.
    • Significant cervical improvement was observed in 86% of patients not in labor.
    • The benefits of PGE2 for unripe cervices, including shorter induction-to-delivery intervals and higher vaginal delivery rates, were maintained.
    • No major adverse effects were linked to salbutamol; one case of intrapartum abruption occurred.

    Conclusions:

    • Oral salbutamol pretreatment before PGE2 for cervical ripening in primigravidae leads to reduced immediate labor onset but significant cervical ripening.
    • This strategy maintains the positive labor outcomes associated with PGE2 while allowing for greater control over uterine activity and delivery timing.
    • The approach may be particularly beneficial for women with suspected placental insufficiency requiring controlled labor induction.