Evaluation of cervical stiffness during pregnancy using semiquantitative ultrasound elastography.
Evaluation of cervical stiffness during pregnancy using semiquantitative ultrasound elastography.
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DOI：
10.1002/uog.12344
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发表时间：
2013-02
影响因子：
7.1
通讯作者：
Romero, R.
中科院分区：
文献类型：
--
作者：
Hernandez-Andrade, E.;Hassan, S. S.;Ahn, H.;Korzeniewski, S. J.;Yeo, L.;Chaiworapongsa, T.;Romero, R.
使用超声衍生弹性成像来评估妊娠期间的颈椎僵硬度，这是一种用于估计振荡压缩时确定感兴趣区域的平均组织位移（应变）的方法。从宫颈的三个解剖平面计算两个感兴趣的区域，即颈椎管和整个宫颈的应变：用于测量颈椎长度的平面的中矢状面，以及位于颈椎内外骨的横切面。使用线性混合模型评估应变值、确定方法和患者特征之间的关联，以解释受试者内部的相关性。对20名患者的两名手术者在120个感兴趣区域对颈椎僵硬程度的定义进行了评估。262例患者在妊娠8-40周共进行了1557次应变估计。调整其他变异来源后，1)在宫颈内管中获得的宫颈组织应变估计值比在整个宫颈中获得的估计值平均大33%；2)颈外弓突横切面和矢状面测量值分别比颈内弓突横切面测量值高45%和13%；3)有早产史和无早产史的多产妇女的平均应变率分别比无产妇女高14%和5%，宫颈长度在25-30mm之间的妇女的平均应变率比宫颈长度在bbb30mm之间的妇女高13%；宫颈组织劳损与宫颈长度的关系大于与胎龄的关系。半定量弹性成像可用于评估妊娠期间宫颈僵硬的变化。
To evaluate cervical stiffness during pregnancy using ultrasound-derived elastography, a method used to estimate the average tissue displacement (strain) on a defined region of interest when oscillatory compression is applied. Strain was calculated in two regions of interest, the endocervical canal and the entire cervix, from three anatomical planes of the cervix: mid-sagittal in the plane used for cervical length measurement, and in cross-sectional planes located at the internal and external cervical os. Associations between strain values, method of ascertainment and patient characteristics were assessed using linear mixed models to account for within-subject correlation. Inter-rater agreement in defining the degree of cervical stiffness was evaluated in 120 regions of interest acquired by two operators in 20 patients. A total of 1557 strain estimations were performed in 262 patients at 8-40 weeks of gestation. Adjusting for other sources of variation, 1) cervical tissue strain estimates obtained in the endocervical canal were on average 33% greater than those obtained in the entire cervix; 2) measures obtained in the cross-sectional plane of the external cervical os and sagittal plane were 45% and 13% greater compared to those measured in the cross-sectional plane of the internal cervical os, respectively; 3) mean strain rate was 14% and 5% greater among multiparous women with and without a history of preterm delivery compared to nulliparous women, respectively, and was on average 13% greater among women with a cervical length between 25-30mm compared to those with a cervical length >30mm; and 4) cervical tissue strain was more strongly associated with cervical length than with gestational age. Semiquantitative elastography can be employed to evaluate changes in cervical stiffness during pregnancy.
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影响因子：
5
作者：
Alam, Farzana;Naito, Kumiko;Ito, Katsuhide
通讯作者：
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作者：
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