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Related Experiment Videos

Fetal heart rate pattern before, during and after amniotomy

B Smis, M Thiery

    European Journal of Obstetrics, Gynecology, and Reproductive Biology
    |December 1, 1980
    PubMed
    Summary

    Low amniotomy, or artificial membrane rupture, generally causes temporary fetal heart rate accelerations and wider bandwidth, not fetal distress. These short-lived changes are comparable whether labor is established or induced.

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    Area of Science:

    • Obstetrics and Gynecology
    • Fetal Monitoring
    • Perinatal Medicine

    Background:

    • Amniotomy is a common obstetric procedure.
    • Understanding its immediate effects on fetal well-being is crucial for clinical practice.
    • Fetal heart rate (FHR) patterns are key indicators of fetal status.

    Purpose of the Study:

    • To prospectively evaluate the immediate effects of low amniotomy on fetal heart rate patterns.
    • To assess whether these effects differ between established labor and induced labor.
    • To determine if observed FHR alterations indicate fetal distress.

    Main Methods:

    • Prospective study of 32 normal term subjects.
    • Low amniotomy performed either early in established labor (16 subjects) or to induce labor (16 subjects).

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  • Continuous fetal heart rate monitoring during and for 1 hour after amniotomy.

    • Main Results:

    • Fetal heart rate pattern alterations were observed in 31 out of 32 fetuses.
    • Most common patterns included transient FHR acceleration and increased bandwidth.
    • Short-lived bradycardia occurred in only 4 subjects; most alterations did not suggest fetal distress.

    Conclusions:

    • Low amniotomy typically induces transient, non-alarming fetal heart rate pattern changes.
    • The incidence and type of FHR alterations are similar in established and induced labor.
    • Artificial membrane rupture is generally not associated with fetal distress.