Virokannas H
Department of Public Health Science, University of Oulu, Finland.
Int Arch Occup Environ Health. 1992;64(5):377-82. doi: 10.1007/BF00379549.
The vibration perception thresholds (VPT) at six frequencies from 16 to 500 Hz were examined in 77 workers exposed to hand-arm vibration and in 77 controls using a limits procedure. A dose-response relationship between VPTs and exposure to vibration was found, and the age-adjusted VPTs at each frequency were higher in workers exposed to vibration than in controls. Carpal tunnel syndrome (at 250 Hz) and consumption of alcohol (at 125 Hz) significantly increased the VPT, but vibration-induced white finger was not correlated with VPT. Indices for low (16 and 32 Hz) and high (63-500 Hz) VPT frequencies were calculated to evaluate the entire vibrogram, which consisted of several frequencies with two numbers. The results showed that hand-arm vibration disturbs first the high frequencies, and that the disturbance spreads thereafter to the low frequencies. The characteristics of the VPT test regarding vibration exposure and the association between VPT and nerve symptoms in the hand support the view that VPT is a useful measure for vibration-induced sensory nerve damage.
采用极限法对77名手臂接触振动的工人和77名对照者在16至500赫兹六个频率下的振动觉阈值（VPT）进行了检测。发现VPT与振动暴露之间存在剂量反应关系，各频率下经年龄调整的VPT在接触振动的工人中高于对照者。腕管综合征（在250赫兹时）和饮酒（在125赫兹时）显著增加了VPT，但振动性白指与VPT无关。计算了低（16和32赫兹）和高（63 - 500赫兹）VPT频率的指数，以评估由几个频率组成的整个振动图，每个频率有两个数值。结果表明，手臂振动首先干扰高频，此后干扰扩展到低频。VPT测试关于振动暴露的特征以及VPT与手部神经症状之间的关联支持了VPT是振动引起的感觉神经损伤的有用测量指标这一观点。
