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Pushing the bounds of second stage in term nulliparas with a predictive model
Alexis C Gimovsky1, Jordan T Levine2, Amelie Pham3
1Division of Maternal Fetal Medicine, Department of Obstetrics and Gynecology, Washington DC.
American Journal of Obstetrics & Gynecology MFM
|December 21, 2020
Summary
A new prediction model helps estimate spontaneous vaginal delivery success during labor. This tool aids clinicians in managing labor duration and counseling patients on risks versus benefits.
Area of Science:
- Obstetrics and Gynecology
- Maternal-Fetal Medicine
- Clinical Decision Support
Background:
- The second stage of labor presents management challenges due to unclear indications for intervention.
- Quantifying the balance between spontaneous vaginal delivery success and maternal/neonatal morbidity is difficult, leading to practice variations.
Purpose of the Study:
- To develop an hourly prediction model for spontaneous vaginal delivery in nulliparous women receiving epidural anesthesia during the second stage of labor.
Main Methods:
- Secondary analysis of the Consortium for Safe Labor database (2002-2008).
- Development of a prediction model using a decision tree, with validation on a withheld test set.
- Creation of a risk calculator tool incorporating hourly predictions of spontaneous vaginal birth and adverse outcomes.
Main Results:
- The study analyzed 22,299 women, with 74.4% achieving spontaneous vaginal delivery.
- Key predictors for spontaneous vaginal delivery included hospital delivery volume, fetal position, cervical dilation, chorioamnionitis, labor augmentation, maternal age, and length of the second stage.
- A risk calculator (AUC 0.73) was developed, available at https://www.pushprescriber.com/.
Conclusions:
- Spontaneous vaginal delivery in term, nulliparous women with epidural anesthesia is influenced by multiple factors.
- The developed calculator aids clinical decision-making and patient counseling regarding labor continuation, success rates, and associated risks.
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