Abstract
Purpose
To assess the value of pre-labor maternal and fetal sonographic variables to predict an unplanned operative delivery.
Methods
In this prospective study, nulliparous women were recruited at 37.0–42.0 weeks of gestation. Sonographic measurements included estimated fetal weight, maternal pubic arch angle, and the angle of progression. We performed a descriptive and comparative analysis between two outcome groups: spontaneous vaginal delivery (SVD) and unplanned operative delivery (UOD) (vacuum-assisted, forceps-assisted and cesarean deliveries). Multivariate logistic regression with ROC analysis was used to create discriminatory models for UOD.
Results
Among 234 patients in the study group, 175 had a spontaneous vaginal delivery and 59 an unplanned operative delivery. Maternal height and pubic arch angle (PAA) significantly correlated with UOD. Analysis of Maximum Likelihood Estimates revealed a multivariate model for the prediction of UOD, including the parameters of maternal age, maternal height, sonographic PAA, angle of progression (AOP), and estimated fetal weight, with an area under the curve of 0.7118.
Conclusion
Sonographic parameters representing maternal pelvic configuration (PAA) and maternal–fetal interface (AOP) improve the prediction ability of pre-labor models for a UOD. These data may aid the obstetrician in the counseling process before delivery.
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Data availability
Available upon request.
Code availability
Not applicable.
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SP: project development, data collection and management, data analysis, manuscript writing/editing. HS: data management, data analysis, manuscript writing/editing. ZK: project development, manuscript writing/editing. RB: manuscript writing and editing. EK: manuscript writing and editing. RA: project development, Manuscript writing/editing. YG: project development, data collection and management, data analysis, manuscript writing/editing. Other (please specify briefly using 1–5 words).
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0828-17-RMC, 7656-10-SMC.
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Perlman, S., Schreiber, H., Kivilevitch, Z. et al. Sonographic risk assessment for an unplanned operative delivery: a prospective study. Arch Gynecol Obstet 306, 1469–1475 (2022). https://doi.org/10.1007/s00404-022-06413-7
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DOI: https://doi.org/10.1007/s00404-022-06413-7