What question did this study set out to answer?

To assess whether variable deceleration characteristics—including computer-calculated area, duration, and depth—can predict intrapartum fetal acidemia measured directly via scalp blood lactate concentration.

November 13, 2021European Journal of Obstetrics & Gynecology and Reproductive BiologyOpen Access

Variable deceleration features and intrapartum fetal acidemia – The role of deceleration area

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Authors

EGErika GyllencreutzKarolinska Institutet IVIngela Hulthén VarliKarolinska University Hospital PLPelle G. LindqvistKarolinska Institutet

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Implication

Cohort study reveals deceleration area and duration outperform depth in predicting fetal acidemia during labor, indicating cumulative heart rate dips better signal distress.

Key Points

To assess whether variable deceleration characteristics—including computer-calculated area, duration, and depth—can predict intrapartum fetal acidemia measured directly via scalp blood lactate concentration.
Analyzed 507 fetuses with predominantly variable decelerations from a cohort of 1,070 labors requiring indicated fetal scalp blood sampling (FBS) at Karolinska University Hospital, Sweden.
Computed mean and cumulative deceleration area, duration, and depth during the 30 and 60 minutes preceding FBS using dedicated software after manual contour tracing.
Evaluated diagnostic performance via Pearson correlations, receiver operating characteristic curves (AUC), and multivariable regression adjusted for baseline heart rate, variability, and accelerations.
Cumulative deceleration area and duration best predicted fetal acidemia (lactate >4.8 mmol/L), yielding AUCs of 0.671 and 0.678 at 30 minutes (0.682 and 0.683 at 60 minutes), compared to depth with AUCs of 0.632 at 30 minutes and 0.631 at 60 minutes.
Pearson correlation coefficients for acidemia were stronger for 30-minute area (r = 0.329) and duration (r = 0.358) than for depth (r = 0.212), with similar patterns observed at 60 minutes.
A cumulative deceleration area threshold >250 beats over 30 minutes occurred in 71% of acidemic versus 43% of non-acidemic fetuses (OR 3.2, 95% CI 1.7–6.1).

Cite This Study

Gyllencreutz et al. (2021) studied this question.

synapsesocial.com/papers/6aa776f2d250be76fafedc5e https://doi.org/10.1016/j.ejogrb.2021.11.009

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Implication

Cohort study reveals deceleration area and duration outperform depth in predicting fetal acidemia during labor, indicating cumulative heart rate dips better signal distress.

Variable deceleration features and intrapartum fetal acidemia – The role of deceleration area

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Implication

Key Points

Cite This Study

Variable deceleration features and intrapartum fetal acidemia – The role of deceleration area

Discussion

Member takes

Implication

Key Points

Cite This Study

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