Mechanical properties of the human Achilles tendon, in vivo
Mechanical properties of the human Achilles tendon, in vivo
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DOI：
10.1016/j.clinbiomech.2011.02.011
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发表时间：
2011-08-01
影响因子：
1.8
通讯作者：
Magnusson, S. P.
中科院分区：
文献类型：
--
作者：
Kongsgaard, M.;Nielsen, C. H.;Magnusson, S. P.
背景：超声技术已广泛应用于肌腱力学性能的体内测量。人类跟腱力学性能的评估已经引起了人们极大的兴趣。跟腱损伤主要发生在阿基里斯-比目鱼肌腱连接处和跟腱骨连接处之间的肌腱区域，即游离跟腱。然而，目前还没有足够的基于超声的方法来量化人类游离跟腱的力学特性。本研究旨在：1)利用超声检查人体游离跟腱在体内的力学特性，2)评估这些测量结果的天间重复性。方法：10例男性受试者跟腱矩臂长度。确定跟腱横截面积和自由跟腱长度。所有受试者分别在两天内进行等距跖屈斜面收缩，以评估再现性。基于超声同时测量跟腱-比目鱼肌肌腱连接处和跟腱骨连接处位移以及跟腱力估算得出自由跟腱力学特性。结果：第1天，游离跟腱最大力、变形和刚度分别为1924 (SD 229) N/mm、2.2 (SD 0.6) mm和2622 (SD 534) N/mm。游离跟腱力学性能的日间重复性无显著差异。最大跟腱力的日相关系数为0.81、5.3%，最大跟腱变形的日相关系数为0.85、11.8%，跟腱刚度的日相关系数为0.84、8.8%。最后，骨腱连接处近端位移平均占肌腱连接处近端位移的71% (SD 12) %。解释：本研究首次提出了一种基于超声在体测量游离AT力学性能的方法。该方法适用于评估与训练、损伤和康复相关的人类自由跟腱力学性能。(C) 2011 Elsevier Ltd.版权所有。
Background: Ultrasonography has been widely applied for in vivo measurements of tendon mechanical properties. Assessments of human Achilles tendon mechanical properties have received great interest. Achilles tendon injuries predominantly occur in the tendon region between the Achilles-soleus myotendinous junction and Achilles-calcaneus osteotendinous junction i.e. in the free Achilles tendon. However, there has been no adequate ultrasound based method for quantifying the mechanical properties of the free human Achilles tendon. This study aimed to: 1) examine the mechanical properties of the free human Achilles tendon in vivo by the use of ultrasonography and 2) assess the between-day reproducibility of these measurements.Methods: Ten male subjects had the Achilles tendon moment arm length. Achilles tendon cross sectional area and free Achilles tendon length determined. All subjects performed isometric plantarflexion ramp contractions to assess between-day reproducibility on two separate days. Simultaneous ultrasonography based measurements of Achilles-soleus myotendinous junction and Achilles-calcaneus osteotendinous junction displacement together with Achilles tendon force estimates yielded free Achilles tendon mechanical properties.Findings: Free Achilles tendon maximal force, deformation and stiffness were 1924 (SD 229) N. 2.2 (SD 0.6) mm and 2622 (SD 534) N/mm on day 1. For between-day reproducibility there were no significant differences between days for free Achilles tendon mechanical properties. The between-day correlation coefficient and typical error percent were 0.81 and 5.3% for maximal Achilles tendon force, 0.85 and 11.8% for maximal Achilles tendon deformation and 0.84 and 8.8% for Achilles tendon stiffness respectively. Last, osteotendinous junction proximal displacement on average contributed with 71 (SD 12) % of proximal myotendinous junction displacement.Interpretation: This study, for the first time, presents an ultrasonography based in vivo method for measurement of free AT mechanical properties. The method is applicable for evaluation of free human Achilles tendon mechanical properties in relation to training, injury and rehabilitation. (C) 2011 Elsevier Ltd. All rights reserved.