Viscoelastic properties of healthy achilles tendon are independent of isometric plantar flexion strength and cross-sectional area.
Viscoelastic properties of healthy achilles tendon are independent of isometric plantar flexion strength and cross-sectional area.
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DOI：
10.1002/jor.22878
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发表时间：
2015-06
期刊：
影响因子：
--
通讯作者：
Cortes DH
中科院分区：
文献类型：
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作者：
Suydam SM;Soulas EM;Elliott DM;Silbernagel KG;Buchanan TS;Cortes DH
损伤后和愈合过程中，肌腱粘弹性的变化是组成和结构改变的产物。连续剪切波弹性成像是一种利用外部剪切波测量软组织粘弹性特性的新技术。该技术尚未对跟腱进行研究，因此，本研究的目的是建立健康跟腱剪切模量和黏度模量的范围，确定这些参数的双边差异，并探讨粘弹性与足底屈曲强度和跟腱面积的相关性。对29例受试者的双侧跟腱自由部分进行连续横波弹性成像。测量足底屈曲强度和横截面积。剪切模量平均为83.2kPa，粘滞模量平均为141.0Pa-s。剪切模量或粘滞模量与面积或强度之间不存在相关性。这表明粘弹性特性可以被认为是一种新的、独立的生物标志物。剪切模量和黏度模量是双侧等效的（p=0.013,0.017），这允许通过侧对侧偏差来确定病变。剪切模量和黏度模量的平均双边变异系数分别为7.2%和9.4%。跟腱的粘弹性可以为跟腱恢复和优化治疗策略提供一个公正、非主观的评级系统。
Changes in tendon viscoelastic properties are observed after injuries and during healing as a product of altered composition and structure. Continuous Shear Wave Elastography is a new technique measuring viscoelastic properties of soft tissues using external shear waves. Tendon has not been studied with this technique, therefore, the aims of this study were to establish the range of shear and viscosity moduli in healthy Achilles tendons, determine bilateral differences of these parameters and explore correlations of viscoelasticity to plantar flexion strength and tendon area. Continuous Shear Wave Elastography was performed over the free portion of both Achilles tendons from 29 subjects. Isometric plantar flexion strength and cross sectional area were measured. The average shear and viscous moduli was 83.2kPa and 141.0Pa-s, respectively. No correlations existed between the shear or viscous modulus and area or strength. This indicates that viscoelastic properties can be considered novel, independent biomarkers. The shear and viscosity moduli were bilaterally equivalent (p=0.013,0.017) which allows determining pathologies through side-to-side deviations. The average bilateral coefficient of variation was 7.2% and 9.4% for shear and viscosity modulus, respectively. The viscoelastic properties of the Achilles tendon may provide an unbiased, non-subjective rating system of tendon recovery and optimizing treatment strategies.