Centre hospitalier régional de Namur, service de chirurgie orthopédique, Av. Albert Ier 185, 5000 Namur, Belgium.
Université Catholique de Louvain, Institut de recherche Experimentale et Clinique, Neuromusculoskeletal lab, Avenue mounier 53, 1200 woluwe saint lambert, Brussels, Belgium.
Clin Biomech (Bristol). 2024 Feb;112:106190. doi: 10.1016/j.clinbiomech.2024.106190. Epub 2024 Feb 2.
Passive stiffness describes how easily a joint may move passively. To accurately measure wrist stiffness, an electro-oscillation device was developed. The objectives were to 1) ensuring that the measurement are free from intentional or reflex contraction, 2) analyzing how forearm anatomy affects the passive stiffness of the wrist and 3) determining the clinical practical relevance of the device.
In this prospective study, the device generated low amplitude sinusoidal motions in flexion and extension on the wrist to quantify elastic and viscous passive stiffness in voluntary orthopaedic patients. The first series of measurements was carried out in the state of voluntary relaxation, the second series of measurements was carried out after an axillary plexus anesthetic block. A matched group of healthy subjects were use for control.
The Electromechanical Oscillation methods effectively enable the measurement of passive joint stiffness since the stiffness values obtained show no statistically significant difference pre-post the anesthesia. The stiffness values are comparable to those of healthy subjects. The effect of forearm passive structure, estimated by the perimeter of the forearm, influences the passive stiffness of the wrist, mainly the viscous component.
The use of sinusoidal oscillation was well accepted by the participants, demonstrating its usefulness and applicability in a clinical setting. This work serves as a foundation for future investigations of orthopaedic and/or neurological pathological conditions characterized by abnormal passive joint stiffness of the wrist. It paves the way for its use as a diagnostic, prognostic, and monitoring tool in these pathologies.
被动刚度描述了关节被动运动的容易程度。为了准确测量手腕的刚度，开发了一种电动摆动装置。目的是：1）确保测量不受有意或反射性收缩的影响；2）分析前臂解剖结构如何影响手腕的被动刚度；3）确定该设备的临床实际相关性。
在这项前瞻性研究中，该设备在腕关节的屈伸方向上产生低幅度正弦运动，以量化自愿接受矫形治疗的患者的弹性和粘性被动刚度。第一组测量是在自愿放松状态下进行的，第二组测量是在腋丛麻醉阻滞之后进行的。一组匹配的健康受试者作为对照组。
电动摆动方法有效地实现了被动关节刚度的测量，因为在麻醉前后获得的刚度值没有统计学上的显著差异。刚度值与健康受试者相当。前臂被动结构的影响，由前臂周长估计，会影响手腕的被动刚度，主要是粘性成分。
正弦摆动的使用得到了参与者的广泛认可，证明了其在临床环境中的有用性和适用性。这项工作为未来研究手腕被动关节刚度异常的矫形和/或神经病理状况奠定了基础。它为该设备在这些病理状况下作为诊断、预后和监测工具的应用铺平了道路。
