局部振动危害与接振时间关系的调查评价

Investigation and evaluation on the harmfulness of partial vibration and the contact vibration time

为探讨接振时间与局部振动危害之间的关系 ,对太原钢铁公司 32 1名局部振动作业工人的手部自觉症状、末梢神经功能和甲皱微循环进行了检查 ,观察其损害程度。结果显示 ,各项检查指标有随接振时间增长而升高的趋势 ,低剂量组低于高剂量组 (P <0 .0 1或P <0 .0 5 ) ,甲皱微循环异常率与痛觉、手麻之间分别存在明显正相关 (r分别为 0 .80 77、0 .72 96 )。提示局部振动对作业工人的手及上肢的各种危害程度与接振时间有关 ,且对末梢神经功能和末梢循环功能的损害同时存在。

The harmfulness from partial vibration with extended contact vibration time was studied by investigating into the symptoms and signs of workers with local vibration disease in Taiyuan Iron & Steel Company. The sense of hand, the function of nerve ending and the microcirculation of fingernail wrinkles of 321 workers working on local vibration operations were examined and observed. The indexes examined are worse with the increase of contact time and are better in low contact group. A positive correlation between the abnormal of microcirculation, the pain and numbness of hand was observed. It is concluded that the degree of harmfulness on hands and upper limbs of whom working on local vibration operation is related to the time of contact vibration. The function of nerve ending and the ending circulation were injured at the same time.