INTRODUCTION Evaluation of nerve mechanical properties has the potential to improve assessment of nerve impairment. Shear wave velocity, as measured by using shear wave (SW) ultrasound elastography, is a promising indicator of nerve mechanical properties such as stiffness. However, elucidation of external factors that influence SW velocity, particularly nerve tension, is required for accurate interpretations. METHODS Median and ulnar nerve SW velocities were measured at proximal and distal locations with limb positions that indirectly altered nerve tension. RESULTS Shear wave velocity was greater at proximal and distal locations for limb positions that induced greater tension in the median (mean increase proximal 89.3%, distal 64%) and ulnar (mean increase proximal 91.1%, distal 37.4%) nerves. DISCUSSION Due to the influence of nerve tension when SW ultrasound elastography is used, careful consideration must be given to limb positioning.

中文翻译：

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肢体位置对使用剪切波超声弹性成像评估神经力学性能的影响。

引言对神经机械特性的评估具有改善对神经损伤评估的潜力。通过使用剪切波（SW）超声弹性成像技术测量的剪切波速度是神经机械特性（例如硬度）的有希望的指标。但是，为准确解释，需要阐明影响SW速度的外部因素，尤其是神经张力。方法测量近端和远端的中，尺神经SW速度，其肢体位置间接改变神经张力。结果肢体位置的近端和远端位置的剪切波速度更大，它们在中位神经（均值增加近端89.3％，远端64％）和尺骨（均值增加近端91.1％，远端37.4％）中产生更大的张力。