Marras W S, Schoenmarklin R W
Department of Industrial and Systems Engineering, Ohio State University, Columbus 43210.
Ergonomics. 1993 Apr;36(4):341-51. doi: 10.1080/00140139308967891.
Cumulative trauma disorders (CTDs) are disorders of the body's tendons and nerves due to repeated exertions and excessive movements. Workers in industrial tasks who have to move their hands and wrists repeatedly and/or forcefully are susceptible to CTDs. One of the major research voids in the study of occupational wrist CTDs is the lack of quantification of the relationship between the known kinematic risk factors, such as wrist angle and repetition, and CTD risk. A quantitative surveillance study was performed in industry in which workers' three-dimensional wrist motions were monitored on the factory floor. A total of 40 subjects from eight industrial plants participated in this study (20 workers in each of two risk groups, low and high). The wrist motion parameters that were monitored for each subject were position, angular velocity, and angular acceleration measures in each plane of movement (radial/ulnar, flexion/extension, and pronation/supination). Descriptive analyses of these measures indicated that generally the mean of the high-risk subjects was larger in magnitude than that of their low-risk counterparts. However, only the velocity and acceleration parameters resulted in significant differences between low- and high-risk groups. These results demonstrate the importance of dynamic components in assessing CTD risk.
累积性创伤失调（CTD）是由于反复用力和过度运动导致身体肌腱和神经的失调。从事工业任务的工人，如果必须反复且/或用力移动他们的手和手腕，就容易患上CTD。在职业性手腕CTD的研究中，一个主要的研究空白是缺乏对已知运动风险因素（如手腕角度和重复次数）与CTD风险之间关系的量化。在工业领域进行了一项定量监测研究，在工厂车间对工人的三维手腕运动进行监测。来自八个工厂的40名受试者参与了这项研究（两个风险组各20名工人，低风险组和高风险组）。为每个受试者监测的手腕运动参数是每个运动平面（桡侧/尺侧、屈伸和旋前/旋后）的位置、角速度和角加速度测量值。对这些测量值的描述性分析表明，一般来说，高风险受试者的平均值在数值上大于低风险受试者。然而，只有速度和加速度参数在低风险组和高风险组之间产生了显著差异。这些结果证明了动态因素在评估CTD风险中的重要性。
