Three‐dimensional ultrasound assessment of the cervix for predicting time to spontaneous onset of labor and time to delivery in prolonged pregnancy

Rovas, Linas; Sladkevicius, Povilas; Strobel, E; Smet, Frank De; Moor, Bart De; Valentin, Lil

doi:10.1002/uog.2805

Cited by 18 publications

(13 citation statements)

References 17 publications

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“…A correlation between ultrasound cervical length and the spontaneous onset of labor at term10–12 and in prolonged pregnancies13, 14 has been reported previously. Strobel et al studied 97 women at 42 weeks and found that cervical length is an independent predictor of the spontaneous onset of labor13.…”

Section: Discussionmentioning

confidence: 53%

Ultrasound assessment of cervical length in prolonged pregnancy: prediction of spontaneous onset of labor and successful vaginal delivery

Vankayalapati¹,

Sethna²,

Roberts³

et al. 2008

Ultrasound in Obstet & Gyne

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Section: Discussionmentioning

confidence: 53%

Ultrasound assessment of cervical length in prolonged pregnancy: prediction of spontaneous onset of labor and successful vaginal delivery

Vankayalapati¹,

Sethna²,

Roberts³

et al. 2008

Ultrasound in Obstet & Gyne

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“…With the popularity of 3D ultrasounds, it is possible to more easily and precisely measure cervical volume 16, 17. Much research is being published on cervical volume using 3D imaging 18-20, but only one study has reported the value of cervical volume for predicting the onset of spontaneous labor at full term 14. However, this study's focus was on postterm pregnant women (≥ 41+5 gestational weeks) and the number of participants was quite small (n=60).…”

Section: Discussionmentioning

confidence: 99%

Clinical Efficacy of Cervical Length and Volume for Prediction of Labor Onset in VBAC Candidates

Jo¹,

Lee²,

Kim³

et al. 2012

Int. J. Med. Sci.

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Background: The purpose of this research is to discover whether measurement of cervical length and cervical volume at term is helpful in predicting the onset of labor in VBAC candidates.Methods: Transvaginal sonographic evaluations of the cervixes of pregnant women who desired to undergo VBAC were performed between 36 - 40 weeks gestation. Clinical information such as labor onset time, gestational age at delivery and delivery mode was gathered from medical records.Results: A total of 514 pregnant women participated in this study. Cervical length was significantly longer in the group that delivered 7 days or more after measurement than in the group that delivered within 7 days of measurement (43±0.77 cm vs. 2.99±0.72 cm, p< 0.001). Cervical volume was significantly larger in the group that delivered at and after 7 days than in the group that delivered within 7 days (29.21±11.62 cm3 vs. 34.07±13.41 cm3, p=0.014). The cervical length ROC curve was significantly more predictive than the cervical volume ROC curve (AUC: 0.711 vs 0.594, p= 0.001). There were no significant differences between the combined cervical length/volume ROC curve and the cervical length ROC curve alone (p= 0.565). The AUC of the cervical length ROC curve to predict postterm pregnancy was 0.729.Conclusion: Measuring cervical length is helpful in predicting the onset of spontaneous labor within 7 days and posterm delivery in VBAC candidates.

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“…13,19 However, magnetic resonance imaging is not a practical imaging modality in pregnancy, and our goal was to investigate a sonographically based method. Others have used 3D sonography to measure the cervical length, 20,21 predict the time to spontaneous labor, 22 and predict the success of prostaglandin induction 23 in prolonged pregnancy. In this present study, 3D sonography was used to show cervical shape changes associated with both normal and abnormal pregnancy.…”

Section: Discussionmentioning

confidence: 99%

A Method to Visualize 3-Dimensional Anatomic Changes in the Cervix During Pregnancy

Iams

Tangchitnob

Socrate

et al. 2010

Journal of Ultrasound in Medicine

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Objective. The purpose of this study was to develop a method to visualize 3-dimensional (3D) anatomic changes in the cervix and lower uterine segment during the antepartum period. Methods. An observational study of patients with both uncomplicated and complicated pregnancies was performed. To visualize 3D anatomic changes, solid models were constructed from 3D sonographic data. Model construction followed a 3-step protocol. First, 3D transvaginal sonographic data of the cervix and lower uterine segment were obtained. Second, sonographic data were exported to a medical image-processing program, which was used to align 3D sonographic data obtained from a single patient at different time points. Last, sonographic data were used to guide construction of solid models using mechanical design software. Anatomic changes were visualized by comparing solid models constructed from sonographic data obtained at different time points. Results. From 16 patients who consented, 5 patients were selected for this study. Two to 4 models were derived from each of the 5 patients at 15 to 38 weeks' gestation. To show anatomic changes in the cervix and lower uterine segment, solid models from different time points in the same patient were superimposed. A total of 16 solid models were constructed. In addition, 3D changes associated with second-trimester cervical failure and successful therapeutic cerclage were shown. Conclusions. A method to visualize 3D cervical changes is presented, revealing complex anatomic changes in the lower uterine segment, cervical stroma, and cervical mucosa as pregnancy progresses. Key words: cervical ripening; cervix; 3-dimensional sonography.Received July 20, 2009, Maternal-Fetal Medicine Annual Meeting; January 26-31, 2009; San Diego, California. Address correspondence to Christopher T. Lang, MD, Ohio State University Medical Center, 395 W 12th Ave, Fifth Floor, Columbus,.com Abbreviations 3D, 3-dimensional; 2D, 2-dimensional onographic measurement of cervical length is a well-established modality for identifying women at high risk for spontaneous preterm birth.

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Three‐dimensional ultrasound assessment of the cervix for predicting time to spontaneous onset of labor and time to delivery in prolonged pregnancy

Abstract: Objectives To determine whether three-dimensional (3D) ultrasound including power Doppler examination of the cervix is useful for predicting time to spontaneous onset of labor or time to delivery in prolonged pregnancy. Methods

Cited by 18 publications

References 17 publications

Ultrasound assessment of cervical length in prolonged pregnancy: prediction of spontaneous onset of labor and successful vaginal delivery

Ultrasound assessment of cervical length in prolonged pregnancy: prediction of spontaneous onset of labor and successful vaginal delivery

Clinical Efficacy of Cervical Length and Volume for Prediction of Labor Onset in VBAC Candidates

A Method to Visualize 3-Dimensional Anatomic Changes in the Cervix During Pregnancy

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