Measuring cervical length with ultrasound: evaluation of the procedures and duration of a learning method

Vayssière, C.; Morinière, Catherine; Camus, E.; Strat, Yann Le; Poty, L.; Fermanian, Jacques; Ville, Y.

doi:10.1046/j.1469-0705.2002.00854.x

Cited by 28 publications

(10 citation statements)

References 16 publications

(11 reference statements)

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“…Cervix can be easily visualised by transabdominal scan by most observers. Transvaginal screening of cervix however needs more training and sonographers are needed to do at least 50 scans before doing a transvaginal assessment of cervix [4, 11]. Transabdominal measurement of cervical length can have several confounding factors like bladder filling and presence of presenting part [12, 13].…”

Section: Discussionmentioning

confidence: 99%

Can Transabdominal Scan Predict a Short Cervix by Transvaginal Scan?

Nambiar¹,

Pai²,

Reddy³

et al. 2017

Obstetrics and Gynecology International

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Background. To determine whether transabdominal screening can be used to screen women with short cervix on transvaginal scan. Methods. The study was done between 18 and 20 weeks of gestation. Transabdominal scan was done and cervical length was measured. Transvaginal scan was also done and cervical length was measured. An attempt was made to find out whether transabdominal scan be used to predict a cervical length of 25 mm by transvaginal scan. Results. In our study the cut-off for transabdominal scan for detecting a short cervix of 25 mm by transvaginal scan was 29 mm. A transabdominal cervical length of 29 mm could predict a short cervix of 25 mm by transvaginal scan by 100% sensitivity and 92.4% sensitivity. Conclusion. A cut-off of 29 mm by transabdominal scan is very accurate in predicting a short cervix of 25 mm by transvaginal scan.

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Section: Discussionmentioning

confidence: 99%

Can Transabdominal Scan Predict a Short Cervix by Transvaginal Scan?

Nambiar¹,

Pai²,

Reddy³

et al. 2017

Obstetrics and Gynecology International

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“…75,76 The internal os is usually visualized at the time of cervical length estimation and constitutes one of the required landmarks for a correct measurement. 51,77 Recently, other investigators have also applied elastography techniques to study cervical areas located close to the internal os. Molina et al 29 reported that the internal, inferior parts of the cervix were significantly stiffer than the external, superior parts.…”

Section: Discussionmentioning

confidence: 99%

Strain at the internal cervical os assessed with quasi-static elastography is associated with the risk of spontaneous preterm delivery at ≤34 weeks of gestation

Hernández‐Andrade

Garcia

Ahn

et al. 2015

Journal of Perinatal Medicine

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Aim To evaluate the association between cervical strain assessed with quasi-static elastography and spontaneous preterm delivery. Methods Quasi-static elastography was used to estimate cervical strain in 545 pregnant women with singleton pregnancies from 11 weeks to 28 weeks of gestation. Cervical strain was evaluated in one sagittal plane and in the cross-sectional planes of the internal cervical os and external cervical os. The distribution of strain values was categorized into quartiles for each studied region and their association with spontaneous preterm delivery at ≤34 weeks and at <37 weeks of gestation was evaluated using logistic regression. Results The prevalence of spontaneous preterm delivery at <37 weeks of gestation was 8.2% (n=45), and that at ≤34 weeks of gestation was 3.8% (n=21). Strain in the internal cervical os was the only elastography value associated with spontaneous preterm delivery. Women with strain values in the third and fourth quartiles had a significantly higher risk of spontaneous preterm delivery at ≤34 weeks and at <37 weeks of gestation when compared to women with strain values in the lowest quartile. When adjusting for a short cervix (<25 mm) and gestational age at examination, women with strain values in the third quartile maintained a significant association with spontaneous preterm delivery at ≤34 weeks (OR 9.0; 95% CI, 1.1–74.0; p=0.02), whereas women with strain values in the highest quartile were marginally more likely than women with lowest quartile strain values to deliver spontaneously at ˂37 weeks of gestation (OR 2.8; 95% CI: 0.9–9.0; p=0.08). Conclusion Increased strain in the internal cervical os is associated with higher risk of spontaneous preterm delivery both at ≤34 and <37 weeks of gestation.

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“…The ultrasound probe was slowly advanced into the vagina until the cervix was clearly seen, being careful to not apply pressure to the cervix with the probe. Cervical measurements were considered correct when they met all of the following criteria: the entire length of the cervical canal was visualized, and the anterior and posterior cervical lips were equal in diameter . Cervical length was calculated as the mean of three consecutive measurements.…”

Section: Methodsmentioning

confidence: 99%

“…Transvaginal ultrasound examination appears to be a feasible alternative to the traditional Bishop rating, because it is not only considered to be reproducible, but also has high intraobserver and interobserver reliability . Furthermore, ultrasound cervical assessment is easy to learn and provides images that can be recorded for intra‐ and interobserver comparisons . Several authors have evaluated the usefulness of the Bishop score and cervical length in predicting the success of labor induction .…”

Section: Introductionmentioning

confidence: 99%

“…It has been previously shown that the performance of only five consecutive correct cervical ultrasound examinations is a valid criterion for determining that the technique has been adequately learned by inexperienced trainees . Reproducibility of the Bishop score and cervical length assessment before labor induction has been previously evaluated in a limited number of studies, but it has not been heretofore evaluated in inexperienced examiners.…”

Section: Introductionmentioning

confidence: 99%

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Cervix assessment for the management of labor induction: Reliability of cervical length and Bishop score determined by residents

Garcia-Simon

Gracia-Cólera

Moreno

et al. 2014

J of Obstet and Gynaecol

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Measuring cervical length with ultrasound: evaluation of the procedures and duration of a learning method

Abstract: Objective To evaluate the learning curve and principal learning steps for a novice ultrasound operator to master the technique for measuring cervical length by transvaginal ultrasound. Subjects and methods

Cited by 28 publications

References 16 publications

Can Transabdominal Scan Predict a Short Cervix by Transvaginal Scan?

Can Transabdominal Scan Predict a Short Cervix by Transvaginal Scan?

Strain at the internal cervical os assessed with quasi-static elastography is associated with the risk of spontaneous preterm delivery at ≤34 weeks of gestation

Cervix assessment for the management of labor induction: Reliability of cervical length and Bishop score determined by residents

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