Relationship between shear modulus and passive tension of the posterior shoulder capsule using ultrasound shear wave elastography: A cadaveric study
Relationship between shear modulus and passive tension of the posterior shoulder capsule using ultrasound shear wave elastography: A cadaveric study
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DOI：
10.1016/j.jbiomech.2019.109498
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发表时间：
2020-01-23
影响因子：
2.4
通讯作者：
Katayose, Masaki
中科院分区：
文献类型：
--
作者：
Iida, Naoya;Taniguchi, Keigo;Katayose, Masaki
尽管剪切波弹性成像（SWE）已被用于间接测量肌肉组织中的被动张力，但尚不清楚SWE是否能够充分评估包膜组织中的被动张力。本研究使用SWE研究了肩关节后囊的剪切模量与被动张力之间的关系。从10具新鲜冷冻尸体中解剖10个后中和10个后下肩关节囊;从每个囊中创建肱骨头-囊-关节盂标本。肱骨头和关节盂用夹具固定在定制器械中。通过滑轮系统对每个胶囊施加载荷（0 - 400 g，以25 g为增量）;使用SWE同时测量弹性。通过将最小二乘回归线拟合到数据来分析每个测试胶囊的弹性-载荷关系。通过比较在逐步施加载荷期间和之后的100 g载荷的弹性模量，评价由于蠕变或滞后效应引起的弹性变化。对于所有20个测试胶囊，观察到的剪切模量和被动胶囊张力之间的关系是高度线性的（p <0.01）。后中囊和后下囊的平均决定系数分别为0.882 +/-0.075和0.901 +/-0.050。对于后中（p = 0.205）和后下囊（p = 0.161），两次100 g载荷评估之间的剪切模量无差异。因此，SWE是一种有效和有用的方法，用于间接评估特定肩关节后囊在载荷下的被动张力变化。(C)2019爱思唯尔有限公司版权所有。
Although shear wave elastography (SWE) has been used to indirectly measure passive tension in muscle tissues, it is unknown whether SWE can adequately evaluate passive tension in capsule tissues. This study investigated the relationship between the shear modulus and passive tension in the posterior shoulder capsule using SWE. Ten posterior middle and ten posterior inferior shoulder capsules were dissected from ten fresh-frozen cadavers; humeral head-capsule-glenoid specimens were created from each capsule. The humeral head and glenoid were immobilized with clamps in a custom-built device. Loads (0-400 g, in 25-g increments) were applied to each capsule via a pulley system; elasticity was simultaneously measured using SWE. The elasticity-load relationship of each tested capsule was analyzed by fitting a least-squares regression line to the data. Elasticity change due to creep or hysteresis effects was evaluated by comparing the elastic modulus for a 100-g load during and after the stepwise application of the loads. The observed relationship between the shear modulus and passive capsule tension was highly linear for all twenty tested capsules (p < 0.01). The mean coefficient of determination was 0.882 +/- 0.075 and 0.901 +/- 0.050 for the posterior middle and posterior inferior capsules, respectively. There was no difference in the shear modulus between the two 100-g load assessments for both the posterior middle (p = 0.205) and posterior inferior capsules (p = 0.161). Thus, SWE is a valid and useful method for indirectly evaluating the change in the passive tension under loading in specific posterior shoulder capsule. (C) 2019 Elsevier Ltd. All rights reserved.