Donders Institute for Brain, Cognition and Behaviour, Radboud University Nijmegen, 6525 GD Nijmegen, The Netherlands.
FysioHolland Twente, 7512 AC Enschede, The Netherlands.
Sensors (Basel). 2023 May 22;23(10):4968. doi: 10.3390/s23104968.
This study aimed to investigate whether sample entropy (SEn) and peak frequency values observed in treadmill walking could provide physical therapists valuable insights into gait rehabilitation following total knee arthroplasty (TKA). It was recognized that identifying movement strategies that during rehabilitation are initially adaptive but later start to hamper full recovery is critical to meet the clinical goals and minimize the risk of contralateral TKA. Eleven TKA patients were asked to perform clinical walking tests and a treadmill walking task at four different points in time (pre-TKA, 3, 6, and 12 months post-TKA). Eleven healthy peers served as the reference group. The movements of the legs were digitized with inertial sensors and SEn and peak frequency of the recorded rotational velocity-time functions were analyzed in the sagittal plane. SEn displayed a systematic increase during recovery in TKA patients ( < 0.001). Furthermore, lower peak frequency ( = 0.01) and sample entropy ( = 0.028) were found during recovery for the TKA leg. Movement strategies that initially are adaptive, and later hamper recovery, tend to diminish after 12 months post-TKA. It is concluded that inertial-sensor-based SEn and peak frequency analyses of treadmill walking enrich the assessment of movement rehabilitation after TKA.
本研究旨在探讨在跑步机行走时观察到的样本熵（SEn）和峰值频率值是否能为物理治疗师提供有关全膝关节置换术（TKA）后步态康复的有价值的见解。人们认识到，确定在康复期间最初是适应性的但后来开始阻碍完全恢复的运动策略对于实现临床目标和最大限度地降低对侧 TKA 的风险至关重要。11 名 TKA 患者被要求在四个不同时间点（TKA 前、TKA 后 3、6 和 12 个月）进行临床行走测试和跑步机行走任务。11 名健康同龄人作为参考组。腿部运动通过惯性传感器数字化，在矢状面分析记录的旋转速度-时间函数的 SEn 和峰值频率。在 TKA 患者的康复过程中，SEn 显示出系统性的增加（<0.001）。此外，在 TKA 腿的康复过程中发现较低的峰值频率（=0.01）和样本熵（=0.028）。最初适应性的运动策略，后来阻碍了恢复，在 TKA 后 12 个月后往往会减少。因此，可以得出结论，基于惯性传感器的 SEn 和峰值频率分析跑步机行走丰富了 TKA 后运动康复的评估。
