The use of cervical sonography to differentiate true from false labor in term patients presenting for labor check

Kunzier, Nadia B.; Kinzler, Wendy L.; Chavez, Martin; Adams, Tracy; Brand, Donald A.; Vintzileos, Anthony M.

doi:10.1016/j.ajog.2016.03.031

Cited by 9 publications

(6 citation statements)

References 24 publications

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“…An experimental follow‐up of term pregnant women by ultrasonography revealed a good overall correlation between cervical length and its ability to differentiate true from false labor. ‘Overall, a cervical length cutoff of ≤1.5 cm to predict true labor had the highest specificity (81%) and positive predictive value (83%)’ . Other researchers also advocate this hypothesis: ‘a woman with similar dilation, who has advanced effacement, is nearly 2.5 times more likely to deliver within 7 days, and twice as likely to deliver within 14 days’ .…”

Section: Discussionmentioning

confidence: 99%

“…'Overall, a cervical length cutoff of ≤1.5 cm to predict true labor had the highest specificity (81%) and positive predictive value (83%)'. 25 Other researchers also advocate this hypothesis: 'a woman with similar dilation, who has advanced effacement, is nearly 2.5 times more likely to deliver within 7 days, and twice as likely to deliver within 14 days'. 15 In other words, follow-up of women with similar cervical dilatation, showed that those with greater progression of effacement delivered 2.5 times sooner than the others over seven day management, while more prolonged follow-up at 14 days showed the mentioned group delivered two times more, as well.…”

Section: Discussionmentioning

confidence: 99%

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Comparison of effacement curve with dilatation curve for prediction of labor progression

Agah

Baghani

Nazarzadeh

et al. 2017

J of Obstet and Gynaecol

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Aim: This study was conducted to evaluate the ability of the effacement curve to predict fetal descent by comparing it to dilatation in order to improve the accuracy of the current partogram. Method: We conducted an observational study of women who were admitted for vaginal delivery at Mobini Hospital, Sabzevar, Iran in 2015. During labor, dilatation and effacement were plotted in different graphs and then their association with fetal descent was separately evaluated and compared. This assessment was performed in two groups: primipara and multipara. Results: From 1750 individuals, 503 primiparous and 512 multiparous women were eligible for the study. An adjusted generalized estimating equations multivariable model showed both dilatation and effacement had a significant relationship with fetal descent either in primipara or multipara. In primipara, the prediction value of effacement equalled dilatation (β,eff 0.29, P < 0.001; β,dil 0.30, P < 0.001). In multipara, the prediction value of effacement was obviously higher than dilatation (β,eff 0.45, P < 0.001; β,dil 0.27, P < 0.001). The strength of effacement to predict labor in multipara was clearly greater than in primipara (β,eff 0.45 and β,eff 0.29, respectively). The strength of dilatation to predict labor in multipara was comparable to primipara (β,dil 0.27 and β,dil: 0.30, respectively). Conclusions: Regarding the acceptable predictive value of effacement, we believe considering effacement, dilatation and station curves altogether can improve the power of the existing partogram for the assessment of labor progression and detection of failure to progress.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Comparison of effacement curve with dilatation curve for prediction of labor progression

Agah

Baghani

Nazarzadeh

et al. 2017

J of Obstet and Gynaecol

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“…Indeed, Kunzier et al reported a 58.4% prevalence of true labor in patients via CL measurements. 28 Furthermore, Bouzid et al reported a significantly better result in the differentiation of true and false term labor cases with CL measurements and combined UCA measurements with UCAs >123 . 14 We found a 7.5 LR (+) for women with a UCA ≥105 and delivery within 7 days.…”

Section: Interpretation and Comparison With Other Literaturementioning

confidence: 99%

Assessment of utero‐cervical angle and cervical length as predictors for threatened preterm delivery in singleton pregnancies

Korkmaz,

Kiyak,

Bolluk

et al. 2023

J of Obstet and Gynaecol

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ObjectivesThe aim of this study was to evaluate the relationship between the cervix and the threat of preterm labor in singleton pregnancies between gestational weeks less than 37 and greater than 37 weeks in correlation with utero‐cervical angle (UCA) and cervical length (CL) measurements.Materials and MethodsWe conducted a prospective cohort study with UCA and CL measurements in patients with threatened preterm labor (TPL). Primary outcome was differences in UCA and CL measurements in relationship to maternal characteristics and perinatal outcome between groups. Secondary outcome evaluated measurement results and influencing factors for delivery within 7 days, between 1 and 4 weeks and beyond 4 weeks.ResultsOverall 152 patients were divided into as study/preterm group (<37 weeks; n = 56) and the control/term group (≥37 weeks; n = 96). Mean gestational age at admission was similar in both groups (30.98 ± 2.83 vs. 30.36 ± 2.63 weeks, p = 0.149) with similar CL (33.9 ± 6.34 vs. 32.02 ± 8.88 mm, p = 0.132), but wider UCA in the preterm group (81.65 ± 16.81° vs. 99.21 ± 22.33°, p < 0.001). Multivariate logistic regression analysis for preterm delivery was significant for nulliparity and UCA measurement. The factor for delivering before 37 gestational weeks within 7 days was the gestational week at admission (p = 0.046). UCA and CL measurements were statistically significant for distinguishing patients for delivery within 7 days and beyond 4 weeks (p = 0.001 for CL and p = 0.0001 for UCA). NPV was found 92.5, 92.2, and 92.3 for UCA >105°, CL ≤30 mm, and Bishop score >3, respectively.ConclusionCombined measurement of TV UCA and CL represents stronger predictors for sPTB ultrasonographically, demonstrating the uterocervical sub‐segment maturation before the active onset of labor.

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“…Another potential application for TVUS at the time of term labor lies in distinguishing true labor from false labor in patients presenting with labor symptoms. In one study of term nulliparous and multiparous patients, a CL cutoff of 1.5 cm provided the highest specificity (81%), positive predictive value (83%), and positive likelihood ratios (4.2) for distinguishing true from false labor [54]. Although promising, the results of the findings have yet to be confirmed by other studies, and there is insufficient evidence to support its use and clinical utility.…”

Section: Us Cervix Transperinealmentioning

confidence: 99%

ACR Appropriateness Criteria® Assessment of Gravid Cervix

Gyn¹,

Imaging

Oliver

et al. 2020

Journal of the American College of Radiology

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The use of cervical sonography to differentiate true from false labor in term patients presenting for labor check

Cited by 9 publications

References 24 publications

Comparison of effacement curve with dilatation curve for prediction of labor progression

Comparison of effacement curve with dilatation curve for prediction of labor progression

Assessment of utero‐cervical angle and cervical length as predictors for threatened preterm delivery in singleton pregnancies

ACR Appropriateness Criteria® Assessment of Gravid Cervix

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