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[Fetal oxygen saturation during normal delivery].

A Nikolov, A Dimitrov, L Vakrilkova

    Akusherstvo I Ginekologiia
    |April 6, 2001
    PubMed
    Summary
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    Fetal pulse oximetry is a simple, non-invasive method for monitoring oxygen saturation (SpO2) during labor. This study found normal SpO2 values and confirmed the method

    Area of Science:

    • Obstetrics and Gynecology
    • Fetal Medicine
    • Neonatal Care

    Background:

    • Fetal monitoring during labor is crucial for assessing well-being.
    • Non-invasive methods are preferred for reduced maternal and fetal risks.
    • Establishing normal fetal oxygen saturation ranges is essential.

    Purpose of the Study:

    • To monitor fetal oxygen saturation (SpO2) during uncomplicated labor.
    • To assess normal SpO2 values in fetuses.
    • To compare SpO2 data with fetal blood gas analysis and newborn clinical findings.

    Main Methods:

    • Utilized Nellcor-N 400 fetal pulse oximetry system and FS-14 oxygen sensor.
    • Monitored 53 term pregnant women during active labor without fetal distress.
    • Recorded fetal pulse rate using a Hewlett Packard cardiotocograph.

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    Main Results:

    • Mean SpO2 values were 48.8 +/- 10% in the first stage and 46 +/- 9.6% in the second stage of labor.
    • Mean umbilical artery pH was 7.25, with Apgar scores >7 for all newborns.
    • Observed a wide range of normal SpO2 variations.

    Conclusions:

    • Fetal pulse oximetry is an easy, non-invasive monitoring method.
    • The technique poses no side effects for mother or fetus.
    • Normal SpO2 values during labor exhibit significant variability.