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Silastic cup vacuum extractor or forceps: a comparative study.

J M Svigos1, D G Cave, R Vigneswaran

  • 1Queen Victoria Hospital, Division of Adelaide Medical Centre for Women and Children, Rose Park, South Australia.

Asia-Oceania Journal of Obstetrics and Gynaecology
|December 1, 1990
PubMed
Summary
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The Silastic Cup vacuum extractor offers less maternal morbidity for operative vaginal delivery. However, forceps delivery shows a lower failure rate, especially for rotational procedures.

Area of Science:

  • Obstetrics and Gynecology
  • Maternal-Fetal Medicine

Background:

  • Operative vaginal delivery is crucial for managing childbirth complications.
  • The Silastic Cup vacuum extractor and forceps are common instruments used.
  • Comparing their efficacy and safety is essential for clinical practice.

Purpose of the Study:

  • To compare the limitations and outcomes of using the Silastic Cup vacuum extractor versus forceps for operative vaginal delivery.
  • To evaluate maternal and neonatal morbidity associated with each instrument.
  • To assess instrument-specific failure rates, particularly in rotational deliveries.

Main Methods:

  • A retrospective analysis of a 2-year period was conducted.
  • Data on maternal morbidity (episiotomy, analgesia) and neonatal outcomes were collected.

Related Experiment Videos

  • Failure rates for both vacuum extraction and forceps delivery were compared, including for rotational maneuvers.

    • Main Results:

    • Vacuum extraction was linked to lower maternal morbidity (54.9% episiotomy, 20.9% no analgesia) compared to forceps.
    • Neonatal problems were comparable between the two methods.
    • Vacuum extraction had a higher overall failure rate (6.5%) than forceps (0.7%).
    • For rotational delivery, vacuum extraction showed a 30% failure rate, with no significant difference in maternal/neonatal outcomes otherwise.

    Conclusions:

    • The vacuum extractor is a viable option for mid-cavity or 'lift-out' instrumental deliveries.
    • Kielland's forceps remain a more suitable instrument for rotational vaginal delivery due to lower failure rates.