École de kinésiologie, Faculté de Médecine, Université de Montréal, 2100, boul. Édouard-Montpetit, H3T 1J4 Montréal, Québec, Canada; Centre de réadaptation Marie-Enfant, CHU Sainte-Justine, 5200, rue Bélanger, H1T 1C9 Montréal, Québec, Canada.
Centre de réadaptation Marie-Enfant, CHU Sainte-Justine, 5200, rue Bélanger, H1T 1C9 Montréal, Québec, Canada.
Neurophysiol Clin. 2019 Sep;49(4):335-342. doi: 10.1016/j.neucli.2018.12.001. Epub 2018 Dec 23.
The Lokomat (by L-Force tool) allows the measurement of the maximum voluntary isometric torque (MVIT) at the knee and hip joints in a standing position, as close as possible to the posture adopted during walking. However, the reliability of this measurement in children with cerebral palsy (CP) remains unknown. The main goal of this study was to evaluate inter and intra-tester reliability of a novel tool (L-Force) in CP population.
L-Force reliability was determined in 17 children with CP by two experienced therapists. We collected MVITs in hip and knee flexors and extensors. Relative and absolute reliability of maximum joint torques were estimated using the intra-class correlation coefficient (ICC) and standard error of measurement (SEM), respectively. The correlation between L-Force and hand-held dynamometer (HHD) was also reported.
ICCs were good to excellent for intra and inter-tester reliability (all P≤0.001). The SEM ranged from 2.0 to 4.1 Nm (12.1 to 21.7%) within-tester and from 2.1 to 3.5 Nm (11.9 to 22.5%) between testers. The correlation was fair to good between L-Force and HHD measures (r=[0.50-0.75]; all P˂0.01) with higher values for flexors than extensors.
The L-Force is a reliable tool for quantifying the hip and knee flexors and extensors torques in children with cerebral palsy with an important timesaving and in a more functional posture than traditional HHD.
Lokomat（由 L-Force 工具）允许在尽可能接近行走时采用的姿势下，在站立位置测量膝关节和髋关节的最大自主等长扭矩（MVIT）。然而，这种测量在脑瘫（CP）儿童中的可靠性尚不清楚。本研究的主要目的是评估新型工具（L-Force）在 CP 人群中的内部和内部测试者的可靠性。
两名经验丰富的治疗师在 17 名 CP 儿童中确定了 L-Force 的可靠性。我们收集了髋关节和膝关节屈肌和伸肌的 MVIT。使用组内相关系数（ICC）和测量误差（SEM）分别估计最大关节扭矩的相对和绝对可靠性。还报告了 L-Force 与手持式测力计（HHD）之间的相关性。
内部和内部测试者的 ICC 均为良好至优秀（所有 P≤0.001）。SEM 范围为 2.0 至 4.1 Nm（12.1 至 21.7％），在测试者内和 2.1 至 3.5 Nm（11.9 至 22.5％）之间。L-Force 和 HHD 之间的相关性是公平到良好的（r=[0.50-0.75]；所有 P˂0.01），屈肌的相关性高于伸肌。
L-Force 是一种可靠的工具，可用于量化脑瘫儿童的髋关节和膝关节屈肌和伸肌的扭矩，与传统的 HHD 相比，它可以节省更多的时间，并且更符合功能姿势。
