EPIDEMIOLOGICAL STUDY ON THE HEALTH DISORDER OF THE WORKERS USING MECHANIZED HAND-TOOLS FOR ASSEMBLING SMALL PARTS.

目的是澄清工人的健康状况之间的关系操作机械化手工具（MT）。MT包括电动驱动器和气动驱动器，以及电气部件制造商的工作条件。五十九名女工接受了振动危害的特别检查，其中包括39名机动性操作员（A组）和20名控制员（B组），她们在同一工厂工作时没有机动性。提交人询问了他们的健康和工作条件以及体检情况。周围神经系统的测量项目为手部和手臂的振动感觉和感觉神经传导速度（SNCV）。肌肉骨骼功能指标为捏力、抓力、背力、轻叩能力。“手刺痛”、“手麻木”、“手指伸展困难”的主诉频率A组明显高于b组，“手肿胀”、“手臂重感”的主诉频率A组明显高于b组，体检结果和振动感觉无差异。A组的捏力、抓力（双手）和背部力量均大于b组。A组的手部SNCV中位数显著低于b组。工厂使用的MT的最大振动加速度水平（0.56-1.8m/s2）未超过ISO的暴露准则。结果表明，虽然振动水平足够低，但MT工人出现了生理变化。

The aim was to clarify the relations between the health status of the workers operating mechanized hand tools (MT). MT included electric drivers and air drivers, and the working conditions in an electric parts' maker. Fifty-nine female warkers underwent the special examination for vibration hazards, made up of 39 MT operators (Group A) and 20 controls (Group B) who worked without MT at the same plant. The authors made questions about their health and working conditions and physical examinations. The measured items of the peripheral nervous system were the vibratory sensation and sensory nerve conduction velocity (SNCV) in the hand and arm. Those of the musculoskeletal function were pinching power, grasping power, back strength, and tapping ability. The frequency of the complaints "Tingling of hands" and "Numbness of hands" and "Difficulty of finger extension" in Group A wsa significanty higher than in Group B.The frequency of "Swelling of hands" and "Heavy feeling of arms" in Group A had a higher tendency than Group B.There was no difference in the results of physical examinations and vibratory sensation. Pinching power and grasping power (both hands) and back strength in group A was greater than in Group B.Median SNCV in the hand in Group A was significantly slower than in Group B.The maximum vibration acceleration level (0.56-1.8m/s2) of the MT used at the plant did not exceed the exposure guideline of ISO.The results suggest that although the vibration level was low enough, physiological changes appeared in the workers with MT.