Schussler Eric, Stark David, Bolte John H, Kang Yun Seok, Onate James A
Old Dominion University, Norfolk, VA, USA.
The Ohio State University, Columbus, OH, USA.
Int J Sports Phys Ther. 2017 Aug;12(4):592-600.
Reports estimate that 1.6 to 3.8 million cases of concussion occur in sports and recreation each year in the United States. Despite continued efforts to reduce the occurrence of concussion, the rate of diagnosis continues to increase. The mechanisms of concussion are thought to involve linear and rotational head accelerations and velocities. One method of quantifying the kinematics experienced during sport participation is to place measurement devices into the athlete's helmet or directly on the athlete's head.
The purpose of this research to determine the accuracy of a head mounted device for measuring the head accelerations experienced by the wearer. This will be accomplished by identifying the error in Peak Linear Acceleration (PLA), Peak Rotational Acceleration (PRA) and Peak Rotational Velocity (PRV) of the device.
Laboratory study.
A helmeted Hybrid III 50th percentile male headform was impacted via a pneumatic ram from the front, side, rear, front oblique and rear oblique at speeds from 1.5 to 5 m/s. The X2 Biosystems xPatch® (Seattle, WA) sensor was placed on the headform's right side at the approximate location of the mastoid process. Measures of PLA, PRA, PRV from the xPatch ® and Hybrid III were analyzed for Root Mean Square Error (RMSE), and Absolute and Relative Error (AE, RE).
Seventy-six impacts were analyzed. All measures of correlation, fixed through the origin, were found to be strong: PLA R=0.967 p<0.01, PRA R=0.933 p<0.01, PRV R=0.999 p<0.00. PLA RMSE was 34%, RE 31.0%±14.0, and AE 31.1%±13.7. PRA RMSE was 23.4%, RE -6.7 ± 22.4 and AE 18.9%±13.8. PRV RMSE was 2.2%, RE 0.1 ± 2.2, and AE 1.8 ± 1.3.
Without including corrections for effect of skin artifact, the xPatch® produces measurements highly correlated with the gold standard yet above the average error of testing devices in both PLA and PRA, but a low error in PRV. PLA measures from the xPatch® system demonstrated a high level of correlation with the PLA data from the Hybrid III mounted data collection system.
报告估计，在美国，每年有160万至380万例脑震荡发生在体育和娱乐活动中。尽管一直在努力减少脑震荡的发生，但诊断率仍在持续上升。脑震荡的机制被认为涉及线性和旋转头部加速度及速度。一种量化运动参与过程中所经历运动学的方法是将测量设备置于运动员头盔内或直接置于运动员头部。
本研究的目的是确定一种头戴式设备测量佩戴者头部加速度的准确性。这将通过识别该设备的峰值线性加速度（PLA）、峰值旋转加速度（PRA）和峰值旋转速度（PRV）的误差来实现。
实验室研究。
使用气动撞锤以1.5至5米/秒的速度从正面、侧面、背面、前斜和后斜方向撞击佩戴头盔的第50百分位男性Hybrid III型头模。将X2 Biosystems xPatch®（华盛顿州西雅图）传感器放置在头模右侧乳突的大致位置。分析xPatch®和Hybrid III的PLA、PRA、PRV测量值的均方根误差（RMSE）、绝对误差和相对误差（AE、RE）。
分析了76次撞击。所有通过原点固定的相关性测量均显示很强：PLA，R = 0.967，p < 0.01；PRA，R = 0.933，p < 0.01；PRV，R = 0.999，p < 0.00。PLA的RMSE为34%，RE为（31.0%±14.0），AE为（31.1%±13.7）。PRA的RMSE为23.4%，RE为（-6.7±22.4），AE为（18.9%±13.8）。PRV的RMSE为2.2%，RE为（0.1±2.2），AE为（1.8±1.3）。
在不包括对皮肤伪影影响进行校正的情况下，xPatch®产生的测量值与金标准高度相关，但在PLA和PRA方面高于测试设备的平均误差，而在PRV方面误差较低。xPatch®系统的PLA测量值与Hybrid III安装数据采集系统的PLA数据显示出高度相关性。
3级。
