Thiry Paul, Nocent Olivier, Buisseret Fabien, Bertucci William, Thevenon André, Simoneau-Buessinger Emilie
LAMIH, CNRS, UMR 8201, Université Polytechnique Hauts-de-France, F-59313 Valenciennes, France.
CHU Lille, Université de Lille, F-59000 Lille, France.
Entropy (Basel). 2022 Mar 22;24(4):437. doi: 10.3390/e24040437.
Low back pain (LBP) obviously reduces the quality of life but is also the world's leading cause of years lived with disability. Alterations in motor response and changes in movement patterns are expected in LBP patients when compared to healthy people. Such changes in dynamics may be assessed by the nonlinear analysis of kinematical time series recorded from one patient's motion. Since sample entropy (SampEn) has emerged as a relevant index measuring the complexity of a given time series, we propose the development of a clinical test based on SampEn of a time series recorded by a wearable inertial measurement unit for repeated bending and returns (b and r) of the trunk. Twenty-three healthy participants were asked to perform, in random order, 50 repetitions of this movement by touching a stool and another 50 repetitions by touching a box on the floor. The angular amplitude of the b and r movement and the sample entropy of the three components of the angular velocity and acceleration were computed. We showed that the repetitive b and r "touch the stool" test could indeed be the basis of a clinical test for the evaluation of low-back-pain patients, with an optimal duration of 70 s, acceptable in daily clinical practice.
腰痛（LBP）明显降低生活质量，同时也是全球导致残疾生存年数的首要原因。与健康人相比，预计腰痛患者会出现运动反应改变和运动模式变化。通过对一名患者运动记录的运动学时间序列进行非线性分析，可以评估这种动力学变化。由于样本熵（SampEn）已成为衡量给定时间序列复杂性的相关指标，我们建议开发一种基于可穿戴惯性测量单元记录的时间序列的样本熵的临床试验，用于躯干反复弯曲和恢复（b和r）动作。23名健康参与者被要求以随机顺序，触摸凳子进行50次该动作重复，触摸地板上的盒子进行另外50次重复。计算了b和r动作的角幅度以及角速度和加速度三个分量的样本熵。我们表明，重复性b和r“触摸凳子”测试确实可以作为评估腰痛患者的临床试验基础，最佳持续时间为70秒，在日常临床实践中是可以接受的。
