A novel method for evaluating uterine cervical consistency using vaginal ultrasound gray-level histogram

Kuwata, Tomoyuki; Matsubara, Shigeki; Taniguchi, Nobuyuki; Ohkuchi, Akihide; Ohkusa, Takashi; Suzuki, Mitsuaki

doi:10.1515/jpm.2010.079

Cited by 23 publications

(22 citation statements)

References 9 publications

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“…15,80–83 The lack of association between strain in the sagittal plane and spontaneous preterm delivery can be related to the mixture of strain values from different areas of the cervix. Applying other methods, such as ultrasound attenuation, 84–86 gray-level histogram characteristics, 87,88 or shear wave elastography, 78,79,89 or using reference materials for strain comparisons, 90 may allow for the reliable evaluation of cervical regions other than the internal os.…”

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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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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“…In our study, the AP difference in the control group was not found to be as high as the AP difference in the SUI group. This finding shows that the normal posterior midurethra, unlike the anterior cervix in the study of Kuwata et al [24], might not be so consistent that it absorbs much of the ultrasound beam. Instead, the posterior midurethra absorbed the ultrasound beam less easily, and the anterior and posterior regions had approximately the same echogenicity in the continent women.…”

Section: Discussionmentioning

confidence: 82%

“…Chou et al [23] postulated that this information allows for a more detailed investigation of the endometrium, thus reducing invasive procedures. Finally, Kuwata et al [24] evaluated cervical consistency using vaginal ultrasound gray-level histograms. The authors evaluated the anterior and posterior cervix in pregnant women and related it to the Bishop subscores.…”

Section: Discussionmentioning

confidence: 99%

Quantitative Sonographic Differences in Mid-Urethra between Postmenopausal Women with and without Stress Urinary Incontinence

Olgan

Mantar

Okyay

et al. 2016

Gynecol Obstet Invest

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Aim: The aim of this study was to evaluate midurethral tissue characteristics in continent and stress urinary incontinent postmenopausal women by using transvaginal ultrasound gray-level histogram. Methods: Thirty-seven patients with stress urinary incontinence (SUI) and 77 patients without SUI were evaluated. Vaginal ultrasound gray-level histograms were performed by 2 gynecologists blinded to patients' SUI statuses. The mean gray-level (MGL) of ultrasound gray-level histogram, representing the echogenicity of a region of interest, was measured in the anterior and posterior midurethral wall along a vertical ultrasound beam. The difference in MGL between anterior and posterior (AP difference) midurethra was calculated. Results: The MGL value of SUI patients was found to be lower in posterior (p = 0.008) and higher in anterior midurethral region (p = 0.001) when compared with control group. In addition, the difference in MGL between anterior and posterior midurethra (AP difference) was found to be higher in SUI group (p < 0.001). Multivariate analysis by logistic regression including confounding factors revealed that AP difference was independently associated with presence of SUI (adjusted OR 1.14, 95% CI 1.08-1.20, p < 0.001). Intra- and inter-observer reproducibility was found to be high with intraclass correlation coefficient of 0.83 and 0.78, respectively. Conclusion: Postmenopausal SUI patients might have a distinct midurethral echogenicity pattern with the quantitative ultrasonography.

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“…Although it has been used to estimate cervical consistency (Yamaguchi 2007;Molina 2012), elastography requires special equipment and categorizes stiffness only qualitatively. Some inventive methods using only B-mode ultrasonography have also been attempted (Ross 2007;Kuwata 2010;Parra-Saavedra 2011). ParraSaavedra's cervical consistency index (CCI) innovatively represents cervical consistency in a quantitative manner by measuring the diameter of the deformity caused by compression.…”

Section: Introductionmentioning

confidence: 99%

Introduction of a New Index of Cervical Consistency with Transvaginal B-mode Ultrasonography

Hyodo¹,

Aisaka²

2013

Ultrasound in Medicine & Biology

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A novel method for evaluating uterine cervical consistency using vaginal ultrasound gray-level histogram

Cited by 23 publications

References 9 publications

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

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

Quantitative Sonographic Differences in Mid-Urethra between Postmenopausal Women with and without Stress Urinary Incontinence

Introduction of a New Index of Cervical Consistency with Transvaginal B-mode Ultrasonography

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