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Case 48 - A 35-Year-Old at 40 Weeks with Ruptured Membranes and Arrest of Cervical Dilation at 7 cm for 3 Hours

from Section 6 - Intrapartum/Delivery

Published online by Cambridge University Press:  08 April 2025

Peter F. Schnatz
Affiliation:
The Reading Hospital, Pennsylvania
D. Yvette LaCoursiere
Affiliation:
University of California, San Diego
Christopher M. Morosky
Affiliation:
University of Connecticut School of Medicine
Jonathan Schaffir
Affiliation:
The Ohio State University College of Medicine
Vanessa Torbenson
Affiliation:
Mayo Clinic Alix School of Medicine
David Chelmow
Affiliation:
Virginia Commonwealth School of Medicine
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Summary

This is a case of a 35-year-old gravida 1 para 0 at 39 weeks’ gestation who experienced a protracted active phase of the first stage of labor. The case reviews traditional definitions (based on the work of Friedman) and current Obstetrical Care Consensus guidelines related to the active phase of the first stage of labor. It includes discussion of the 5 Ps that can affect labor progress and interventions that have been shown to have a positive impact on the active phase. Slow but continued progress in the first stage of labor is not an indication for cesarean. To diagnose arrest of dilation in the active phase, the cervix must be ≥ 6 cm dilated with rupture of membranes and ≥ 4 hours of adequate contractions (≥ 200 MvU) or ≥ 6 hours of inadequate contractions.

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