A Feasibility Study on Predicting the Duration of the Second Stage of Labor by Intrapartum Ultrasound
- VernacularTitle:应用产时超声预测第二产程时长的可行性研究
- Author:
Xiao LIU
1
;
Yuanyuan ZHANG
1
;
Yuan LU
1
;
Nannan CAO
1
;
Xietong WANG
1
Author Information
1. 山东第一医科大学附属省立医院产科,山东济南 250021
- Publication Type:Journal Article
- Keywords:
Intrapartum ultrasound;
Angle of progression;
Head-perineum distance;
The second stage of la-bor;
Duration
- From:
Journal of Practical Obstetrics and Gynecology
2025;41(6):496-500
- CountryChina
- Language:Chinese
-
Abstract:
Objective:To explore the feasibility of measuring the angle of progress(AOP)and the fetal head-perineum distance(HPD)by ultrasound to predict the duration of the second stage of labor.Methods:A to-tal of 135 full-term singleton primiparas who gave birth through vagina in Shandong Provincial Hospital Affiliated to Shandong First Medical University from September 2022 to June 2024 were selected.They all received medication for labor analgesia during labor,and the fetal position was determined as occipital anterior position by ultrasound when the cervix was fully dilated.AOP and HPD were measured during the contraction interval.All parturients were divided into group A(duration of the second stage of labor≤60 min),group B(60 min＜duration of the sec-ond stage of labor≤120 min)and group C(duration of the second stage of labor＞120 min).The differences of AOP and HPD among these groups were compared,and their predictive efficacy for vaginal delivery within 60min and 120min was evaluated.Results:①The AOP in group A was higher than that in group B.The HPD in group A was lower than that in group B.The differences were statistically significant(P＜0.01).The AOP in group B was higher than that in group C.The HPD in group B was lower than that in group C.The differences were statistically significant(P＜0.05).②The area under the ROC curve for AOP and HPD to predict a vaginal delivery within 60 min was 0.872 and 0.914,and the optimal cut-off value was 126.25°and 4.52 cm,respectively(P＜0.01).③The area under the ROC curve for AOP and HPD to predict a vaginal delivery within 120 min was 0.901 and 0.801,and the optimal cut-off value was 116.40°and 4.69 cm,respectively(P＜0.01).Conclusions:It is feasible to pre-dict the duration of the second stage of labor duration by measuring AOP and HPD using intrapartum ultrasound.
