Itoigawa Yoshiaki, Takazawa Yuji, Maruyama Yuichiro, Yoshida Keiichi, Sakai Tatsuo, Ichimura Koichiro, Kaneko Kazuo
Department of Orthopedic Surgery, Juntendo University, Urayasu Hospital, Chiba, Japan.
Department of Orthopedic Surgery, Juntendo University, Tokyo, Japan.
Clin Anat. 2018 Apr;31(3):404-408. doi: 10.1002/ca.23000. Epub 2017 Nov 11.
There is currently no method to quantify the quality of the harvested graft before anterior cruciate ligament (ACL) reconstruction. The purpose of this study was to explore a method for measuring stiffness of the normal tendon of the semitendinosus muscle using shear wave elastography (SWE). Our investigation comprised two steps. First, we determined orientation of the semitendinosus tendon fibers in 20 lower legs of embalmed cadavers. Second, we investigated the feasibility of quantifying stiffness of the normal semitendinosus tendon by SWE in 24 subjects (48 legs: 24 male and 24 female subjects) in vivo. Measured values were compared between male and female subjects. The point at the intersection of the semitendinosus tendon with the axial section through the center of the patella mostly was the middle of the semitendinosus tendon in the cadavers. The SWE modulus in all of the subjects could be measured on this point in vivo. The SWE modulus of males and females were 474.0 ± 71.9 kPa and 396.9 ± 104.5 kPa, respectively. The SWE modulus of males was significantly larger than that of females (P < 0.01). This study demonstrates that stiffness of the tendon of the semitendinosus muscle can be measured by SWE. It also shows that tendon of the semitendinosus muscle in males is stiffer than in females. Clin. Anat. 31:404-408, 2018. © 2017 Wiley Periodicals, Inc.
目前，在进行前交叉韧带（ACL）重建之前，尚无方法对获取的移植物质量进行量化。本研究的目的是探索一种使用剪切波弹性成像（SWE）测量半腱肌正常肌腱刚度的方法。我们的研究包括两个步骤。首先，我们在20具防腐处理的尸体小腿中确定了半腱肌腱纤维的方向。其次，我们在24名受试者（48条腿：24名男性和24名女性受试者）体内研究了通过SWE量化正常半腱肌腱刚度的可行性。比较了男性和女性受试者的测量值。在尸体中，半腱肌腱与通过髌骨中心的轴向截面的交点处大多是半腱肌腱的中点。在所有受试者体内的这一点上均可测量SWE模量。男性和女性的SWE模量分别为474.0±71.9 kPa和396.9±104.5 kPa。男性的SWE模量显著大于女性（P<0.01）。本研究表明，半腱肌肌腱的刚度可以通过SWE进行测量。它还表明，男性半腱肌肌腱比女性的更硬。《临床解剖学》31:404 - 408，2018年。©2017威利期刊公司。
