Document Detail

A novel method for evaluating uterine cervical consistency using vaginal ultrasound gray-level histogram.
MedLine Citation:
PMID:  20443760     Owner:  NLM     Status:  MEDLINE    
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 27-30(th) 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.
Tomoyuki Kuwata; Shigeki Matsubara; Nobuyuki Taniguchi; Akihide Ohkuchi; Takashi Ohkusa; Mitsuaki Suzuki
Publication Detail:
Type:  Evaluation Studies; Journal Article    
Journal Detail:
Title:  Journal of perinatal medicine     Volume:  38     ISSN:  1619-3997     ISO Abbreviation:  J Perinat Med     Publication Date:  2010 Sep 
Date Detail:
Created Date:  2010-09-03     Completed Date:  2011-01-04     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  0361031     Medline TA:  J Perinat Med     Country:  Germany    
Other Details:
Languages:  eng     Pagination:  491-4     Citation Subset:  IM    
Department of Obstetrics and Gynecology, Jichi Medical University, Shimotsuke, Tochigi, Japan.
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MeSH Terms
Cervical Ripening
Cervix Uteri / anatomy & histology,  ultrasonography*
Infant, Newborn
Pregnancy Trimester, Second
Pregnancy Trimester, Third
Ultrasonography, Prenatal / methods*,  statistics & numerical data
Vagina / ultrasonography*

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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