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Am J Obstet Gynecol. 1999 Feb;180(2 Pt 1):366-9.

The effect of therapeutic McDonald cerclage on cervical length as assessed by transvaginal ultrasonography.

Author information

  • 1Division of Maternal-Fetal Medicine, Department of Obstetrics and Gynecology, University Hospital Vrije Universiteit, Amsterdam, The Netherlands.

Abstract

OBJECTIVE:

Our goal was to study the effect of therapeutic McDonald cerclage on cervical length with the use of transvaginal ultrasonography.

STUDY DESIGN:

Cervical length was measured serially in singleton pregnancies in which there were doubts regarding cervical competence. When shortening of the cervix was substantial before 27 weeks' gestation a McDonald cerclage was applied. Wilcoxon signed rank test was used, and 1-tailed P <.05 was considered significant.

RESULTS:

In the 34 pregnancies studied, the mean cervical length measured at a mean gestational age of 14 weeks had decreased significantly (P <.0001) from 42 mm (95% confidence interval 38-47) to 21 mm (95% confidence interval 19-23) at a mean gestational age of 20 weeks 5 days, when a cerclage was applied. After the cerclage the mean cervical length increased significantly (P <.0001) to 34 mm (95% confidence interval 30-38) at a mean gestational age of 22 weeks 1 day (95% confidence interval 21 weeks 1 day-23 weeks 2 days).

CONCLUSIONS:

Therapeutic McDonald cerclage results in a longer cervical length as measured by transvaginal ultrasonography.

PMID:
9988802
[PubMed - indexed for MEDLINE]
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