The impact of non-significant variable decelerations appearing in the latent phase on delivery mode: a prospective cohort study

Reproductive Biology and Endocrinology

Methodology

Eliezer Shalev¹  Gali Garmi¹  Raed Salim¹  Zohar Nachum¹ 

[1] Department of Obstetrics and Gynecology, HaEmek Medical Center, Afula, Israel and Rappaport Faculty of Medicine, Technion, Haifa, Israel;

关键词: Cesarean Delivery;    Variable Deceleration;    Neonatal Outcome;    Fetal Heart Rate;    Stepwise Logistic Regression;   

DOI  :  10.1186/1477-7827-8-81

 received in 2010-05-10, accepted in 2010-07-05,  发布年份 2010

来源: Springer

【 摘 要 】

BackgroundVariable decelerations are the most frequent fetal heart rate changes that are related to labor. The objective of the study was to estimate the impact of non-significant variable decelerations (NSV) appearing during the latent phase of labor on delivery mode and neonatal outcome.MethodsWomen at term, who were in the latent phase of labor and had a singleton pregnancy, were prospectively included. Women were divided into three groups. All had a fetal heart rate tracing with normal baseline and variability. The study group was composed of women who had in addition NSV, Category II, according to the National Institute of Child Health and Human Development categorization system. Women who had Category I tracings composed the control group. Women who had non-repetitive severe variables (SV) composed a second control group (Category II-SV). Main outcome compared was mode of delivery. Secondary outcome was cord pH. One-way analysis of variance was used to compare the continuous demographic and clinical variables of the three groups. Backwards stepwise logistic regression using significant univariables was performed to determine which predicted operative delivery. P < 0.05 was considered significant.ResultsOf 1005 women who delivered during the study period 186 had Category II- NSV tracings (study group), 76 had Category II-SV and 251 had Category I tracings. Mode of delivery and indications for operative delivery were similar between women in Category II-NSV compared to Category I. In addition mean cord pH did not differ between the two groups. Conversely, women in Category II-SV, had a higher rate of cesarean or vacuum deliveries compared to the other groups (p = 0.0001). Beside, they had a significantly higher number of neonates born with cord pH between 7.0 to 7.1 (p = 0.03).ConclusionsNon-significant variable decelerations in early stages of labor are probably a non-ominous sign for neonatal outcome and have no impact on delivery mode.

【 授权许可】

Unknown   
© Salim et al; licensee BioMed Central Ltd. 2010. This article is published under license to BioMed Central Ltd. This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/2.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.