期刊
JOURNAL OF INTERNATIONAL MEDICAL RESEARCH
卷 49, 期 2, 页码 -出版社
SAGE PUBLICATIONS LTD
DOI: 10.1177/0300060520985338
关键词
Transvaginal ultrasound; cervix; strain elastography; labor induction; cervical length; vaginal delivery
This study found that measuring cervical elastographic parameters with ElastoScan can improve the predictive performance of cervical length for term labor induction by dinoprostone. The combination of cervical length and elastographic parameters can more accurately predict vaginal delivery within 24 hours.
Objective This study aimed to examine whether addition of cervical elastographic parameters measured by ElastoScan for the cervix (E-cervix) improves the predictive value of cervical length (CL) in induction of labor at term by dinoprostone. Methods We conducted a prospective, observational study between January 2020 and June 2020 in term primiparous women (n = 73) who were scheduled for labor induction by a 10-mg dinoprostone vaginal insert. The time intervals from the start of labor induction to regular uterine contractions and to vaginal delivery were calculated as the primary outcomes. We divided subjects into two groups using a threshold of 24 hours. Ultrasound measurements were compared between the two groups and the area under the curve (AUC) of the prediction model was calculated. Results Women who delivered vaginally within 24 hours had a shorter CL and softer cervix than those who delivered after 24 hours. The combination of CL and elastographic parameters increased the AUC to 0.672 compared with CL alone (AUC = 0.637). Conclusions Measurement by E-cervix is relatively reproducible. Addition of cervical strain elastography slightly improves the predictive performance of CL in vaginal delivery within 24 hours. This technique is a promising ancillary tool for use with ultrasound.
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