The Correlation between Fetal Monitor Decelerations Area and Neonatal Cord pH among Preeclamptic parturient: an Automated Approach to a Clinical Challenge

Abstract

Objective To examine whether a correlation exists between electronic fetal monitoring (EFM) in the final 120 minute prior to delivery and neonatal cord blood pH among parturients with preeclampsia.

Study Design A retrospective cohort study of parturients with term and near-term preeclampsia who delivered at Soroka University Medical Center between 2013 and 2020 was conducted. EFM tracings, demographical data, and obstetrical outcomes were retrieved from the patients' electronic medical records. Using MATLAB program, area under the curve (AUC) measurements were applied. Correlation was calculated using the Spearman's correlation coefficient.

Results EFM of 88 parturients with preeclampsia were assessed. A significant negative correlation was demonstrated between cord blood pH and the decelerations AUC, total decelerations duration, and deceleration depth. No correlation was demonstrated between area over the curve (acceleration) and cord blood pH. In a multivariate linear regression, total deceleration AUC was found independently negatively associated with cord blood pH (beta = −0.264, p = 0.011) controlling for second stage of labor duration and induction of labor.

Conclusion Among parturients with preeclampsia, EFM indices may assist in the diagnosis of fetal acidemia. Further studies are needed to strengthen and establish the use of electronic EFM in the management of labor and delivery.

Key Points

• A negative correlation was demonstrated between cord blood pH and the decelerations AUC.

• Total deceleration AUC was found independently negatively associated.

• Among parturients with preeclampsia, EFM indices may assist in the diagnosis of fetal acidemia.

Keywords

acidemia - deceleration area - electronic fetal monitoring - neonatal morbidity - category 2 - term infants - preeclampsia

Ethical Approval

All procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional and/or national research committee and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards. For this type of study, formal consent is not required. This article does not contain any studies with animals performed by any of the authors. The Soroka Medical Center Institutional Review Board approved the study, with waiver of informed consent due to the retrospective, observational design of the study.

Publication History

Received: 25 July 2023

Accepted: 18 October 2023

Accepted Manuscript online:
23 October 2023

Article published online:
14 November 2023

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