Methods of sonographic cervical length measurement in pregnancy: a review of the literature.

Division of Perinatology and Gynecology, University Medical Center Utrecht, The Netherlands.
Journal of Maternal-Fetal and Neonatal Medicine (Impact Factor: 1.52). 01/2007; 19(12):755-62. DOI: 10.1080/14767050600852601
Source: PubMed

ABSTRACT In this review we give an overview of the methods and pitfalls in cervical length measurements. We compared the different techniques and investigated factors that influence visualization of the cervix. The data in this overview may be used to establish guidelines in clinical practice.

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    Zeitschrift Fur Geburtshilfe Und Neonatologie - Z GEBURTSH NEONATOLOGIE. 01/2007; 211.
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    ABSTRACT: The aim was to evaluate the agreement between and the reproducibility of transperineal and transvaginal ultrasound cervical length measurements performed by the duty obstetrical team in case of preterm labor. The acceptability of transperineal ultrasonography was also assessed. Pregnant patients between 25 and 34 weeks of gestation with contractions and a clinically modified cervix were included. Order of ultrasonography examination (transperineal or transvaginal first) and rank of operator (resident or senior) were allocated randomly. Agreement was assessed using the intraclass correlation coefficient (ICC) and the Bland and Altman plot. The patient's discomfort and preference for either method were assessed with a questionnaire. 62 patients admitted for preterm labor between 25 and 34 weeks of gestation were included. Six seniors and nine residents took part in the study. Among the 51 patients with an interpretable transperineal ultrasound scan, median cervical length measurements with the transperineal and the transvaginal technique were, respectively, 25 mm (0-53) and 27 mm (4-51). Concordance was good with an ICC of 0.83 [IC 95 % = (0.73-0.90)]. Transperineal ultrasonography was preferred in 56.5 % of cases. In case of preterm labor, cervical length measurement with transperineal ultrasonography seems reproducible and can be performed by the obstetric team on duty.
    Archives of Gynecology 04/2014; · 0.91 Impact Factor
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    ABSTRACT: Cervical length measurement by transvaginal scanning (TVS) has been proposed by some as a universal screening test for preterm labour. The presence of prominent cervical mucous may affect assessment of the cervix; however, the exact technique to measure the cervix when there is prominent mucous or funnelling has not been described. We evaluated the level of agreement in cervical length measurements amongst Australian specialists and sonographers reporting on cervical assessment using an online survey. We conducted an online survey with 11 images of the cervix to assess how obstetric sonographers and sonologists report on the cervix when there is prominent mucous or funnelling. They were asked five questions about the image of the cervix. A kappa coefficient was calculated from the responses. We had 151 complete responses to the online survey. For the images which showed funnelling or prominent cervical mucous, there was little agreement regarding the cervix being open or closed and regards the location of the internal os. The Kappa coefficient was 0.22 indicating a low level of agreement for the location of the internal os. There is lack of agreement amongst Australian specialists and sonographers reporting on cervical assessment when there is prominent mucous or funnelling seen in the cervix. We propose a method to standardise reporting on the cervix incorporating the chorioamniotic membrane for the identification of the inner cervical os when there is prominent mucous or funnelling.
    Australian and New Zealand Journal of Obstetrics and Gynaecology 02/2014; · 1.30 Impact Factor

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