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首页> 外文期刊>Advanced Experimental Mechanics >In Vivo Stiffness Characteristics of the Medial Collateral Ligament with Varying Knee Flexion Angles Using Strain Ultrasound Elastography
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In Vivo Stiffness Characteristics of the Medial Collateral Ligament with Varying Knee Flexion Angles Using Strain Ultrasound Elastography

机译：使用应变超声弹性成像技术改变膝关节屈曲角度的内侧副韧带的体内刚度特性

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摘要

The medial collateral ligament (MCL) of the knee is the primary static stabilizer against valgus rotation of the knee and a secondary restraint to anterior tibial translation. In previous studies, stiffness of the MCL was described using length change data under both in vivo and in vitro conditions. This study aimed to describe a direct method to measure the stiffness of the MCL over a range of knee flexion angles using strain ultrasound elastography. Ten healthy males were included. Strain elastography with an acoustic coupler as the reference material was used to obtain relative stiffness of the proximal, middle, and distal portions of the superficial MCL and the meniscofemoral and meniscotibial components of the deep MCL while placing the knees in flexion at angles of 0°, 30°, 60°, 90°, and 120°. The results of this study ensured good measurement reliability with good to excellent intrarater and interrater agreements. The relative stiffness of the MCL was greater during low flexion angles, and the ligament was relaxed when the knee flexion angle increased. Strain elastography with an acoustic coupler is a feasible and reliable method to assess the relative stiffness of the MCL.
机译：膝关节内侧副韧带（MCL）是抵抗膝外翻旋转的主要静态稳定器，是胫骨前平移的次要限制条件。在以前的研究中，使用体内和体外条件下的长度变化数据描述了MCL的刚度。这项研究旨在描述一种直接方法，使用应变超声弹性成像技术在一定范围的膝盖屈曲角度上测量MCL的刚度。包括十名健康男性。以声耦合器为参考材料的应变弹性成像用于获得浅部MCL的近端，中部和远侧部分以及深部MCL的粘膜股骨和粘膜胫骨组件的相对刚度，同时使膝盖以0°角弯曲，30°，60°，90°和120°。这项研究的结果确保了良好的测量可靠性，以及良好的内部评级者和跨界者协议。在低屈曲角度下，MCL的相对刚度更大，当膝关节屈曲角度增加时，韧带松弛。使用声耦合器的应变弹性成像是评估MCL相对刚度的可行且可靠的方法。

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