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Journal of Perinatal Medicine

Official Journal of the World Association of Perinatal Medicine

Editor-in-Chief: Dudenhausen, MD, FRCOG, Joachim W.

Editorial Board: / Bancalari, Eduardo / Greenough, Anne / Genc, Mehmet R. / Chervenak, Frank A. / Chappelle, Joseph / Bergmann, Renate L. / Bernardes, J.F. / Bevilacqua, G. / Blickstein, Isaac / Cabero Roura, Luis / Carbonell-Estrany, Xavier / Carrera, Jose M. / D`Addario, Vincenzo / D'Alton, MD, Mary E. / Dimitrou, G. / Grunebaum, Amos / Hentschel, Roland / Köpcke, W. / Kawabata, Ichiro / Keirse, Marc J.N.C. / Kurjak M.D., Asim / Lee, Ben H. / Levene, Malcolm / Lockwood, Charles J. / Marsal, Karel / Makatsariya, Alexander / Nishida, Hiroshi / Papp, Zoltán / Pejaver, Ranjan Kumar / Pooh, Ritsuko K. / Reiss, Irwin / Romero, Roberto / Saugstad, Ola D. / Schenker, Joseph G. / Sen, Cihat / Seri, Istvan / Vetter, Klaus / Winn, Hung N. / Young, Bruce K. / Zimmermann, Roland

9 Issues per year


IMPACT FACTOR 2016: 1.577
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Online
ISSN
1619-3997
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Volume 38, Issue 5

Issues

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

Tomoyuki Kuwata
  • Department of Obstetrics and Gynecology, Jichi Medical University, Shimotsuke, Tochigi, Japan
  • Ohkusa Ladies Clinic, Sakura, Tochigi, Japan
  • Other articles by this author:
  • De Gruyter OnlineGoogle Scholar
/ Shigeki Matsubara
  • Department of Obstetrics and Gynecology, Jichi Medical University, Shimotsuke, Tochigi, Japan
  • Other articles by this author:
  • De Gruyter OnlineGoogle Scholar
/ Nobuyuki Taniguchi
  • Department of Clinical Laboratory Medicine, Jichi Medical University, Shimotsuke, Tochigi, Japan
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/ Akihide Ohkuchi
  • Department of Obstetrics and Gynecology, Jichi Medical University, Shimotsuke, Tochigi, Japan
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  • De Gruyter OnlineGoogle Scholar
/ Takashi Ohkusa / Mitsuaki Suzuki
  • Department of Obstetrics and Gynecology, Jichi Medical University, Shimotsuke, Tochigi, Japan
  • Other articles by this author:
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Published Online: 2010-05-06 | DOI: https://doi.org/10.1515/jpm.2010.079

Abstract

Aims: To evaluate uterine cervical consistency using a vaginal ultrasound gray-level histogram.

Methods: Vaginal ultrasound and digital examination were performed for 214 women with low-risk singleton pregnancy during 27–30th pregnancy week. The mean gray-level (MGL) of an ultrasound gray-level histogram, representing the echogenicity of a region of interest, was measured in the midsection of anterior and posterior cervical walls. The difference in MGL between anterior and posterior (AP difference) was related to the Bishop sub-score for cervical consistency (0, 1, or 2), determined before ultrasound.

Results: A larger positive AP difference indicated significantly lower Bishop sub-score. After analyzing the receiver operator characteristic curves for the AP difference, a value of 1.42 and –1.98 was the best cut-off value to determine a hard cervix (score 0) and a soft cervix (score 2), respectively. To identify a hard cervix, this test had 71% sensitivity and 82% specificity. For a soft cervix, it was 66% and 87%, respectively.

Conclusions: A more echogenic anterior than posterior cervix indicates a hard cervix; the greater the difference in echogenicity between anterior and posterior walls the harder the cervix. The difference in MGL of the ultrasound gray-level histogram may enable objective evaluation of cervical consistency.

Keywords: Bishop score; cervical consistency; cervical ripening; histogram; mean gray-level

About the article

Corresponding author: Shigeki Matsubara, MD Department of Obstetrics and Gynecology Jichi Medical University 3311-1 Shimotsuke Tochigi 329-0498 Japan Tel.: +81-285-58-7376 Fax: +81-285-44-8505


Received: 2009-12-10

Revised: 2010-03-09

Accepted: 2010-03-23

Published Online: 2010-05-06

Published Online: 2010-05-06

Published in Print: 2010-09-01


Citation Information: Journal of Perinatal Medicine, Volume 38, Issue 5, Pages 491–494, ISSN (Online) 1619-3997, ISSN (Print) 0300-5577, DOI: https://doi.org/10.1515/jpm.2010.079.

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