Keegan Kevin G, Kramer Joanne, Yonezawa Yoshiharu, Maki Hiromitchi, Pai P Frank, Dent Eric V, Kellerman Thomas E, Wilson David A, Reed Shannon K
Department of Veterinary Medicine and Surgery, College of Veterinary Medicine, University of Missouri, Columbia, MO 65211, USA.
Am J Vet Res. 2011 Sep;72(9):1156-63. doi: 10.2460/ajvr.72.9.1156.
To determine repeatability of a wireless, inertial sensor-based lameness evaluation system in horses.
236 horses.
Horses were from 2 to 29 years of age and of various breeds and lameness disposition. All horses were instrumented with a wireless, inertial sensor-based motion analysis system on the head (accelerometer), pelvis (midline croup region [accelerometer]), and right forelimb (gyroscope) before evaluation in 2 consecutive trials, approximately 5 minutes apart, as the horse was trotted in a straight line. Signal-processing algorithms generated overall trial asymmetry measures for vertical head and pelvic movement and stride-by-stride differences in head and pelvic maximum and minimum positions between right and left sides of each stride. Repeatability was determined, and trial difference was determined for groups of horses with various numbers of strides for which data were collected per trial.
Inertial sensor-based measures of torso movement asymmetry were repeatable. Repeatability for measures of torso asymmetry for determination of hind limb lameness was slightly greater than that for forelimb lameness. Collecting large numbers of strides degraded stride-to-stride repeatability but did not degrade intertrial repeatability.
The inertial sensor system used to measure asymmetry of head and pelvic movement as an aid in the detection and evaluation of lameness in horses trotting in a straight line was sufficiently repeatable to investigate for clinical use.
确定一种基于无线惯性传感器的马匹跛行评估系统的可重复性。
236匹马。
马匹年龄从2岁到29岁不等，品种和跛行情况各异。在连续两次试验评估前，所有马匹均配备了基于无线惯性传感器的运动分析系统，该系统包括头部（加速度计）、骨盆（臀中部区域[加速度计]）和右前肢（陀螺仪），两次试验间隔约5分钟，马匹沿直线小跑。信号处理算法生成了垂直头部和骨盆运动的总体试验不对称测量值，以及每个步幅左右两侧头部和骨盆最大和最小位置的逐步步幅差异。确定了可重复性，并针对每次试验收集数据的不同步幅数量的马匹组确定了试验差异。
基于惯性传感器的躯干运动不对称测量是可重复的。用于确定后肢跛行的躯干不对称测量的可重复性略高于前肢跛行。收集大量步幅会降低逐步步幅的可重复性，但不会降低试验间的可重复性。
用于测量头部和骨盆运动不对称以辅助检测和评估直线小跑马匹跛行的惯性传感器系统具有足够的可重复性，可用于临床研究。
