Urban P, Jandak Z, Lukas E, Prochazka B
Centre of Industrial Hygiene and Occupational Disease, National Institute of Public Health, Prague, Czech Republic.
Cent Eur J Public Health. 1995 Nov;3(4):234-7.
Objective was to obtain normative values for the vibratory perception threshold (VPT) in the lower extremities and study the dependence of VPT on various physiological factors. Thirty healthy volunteers: 10 men and 20 women entered in the study. The VPT for 8, 16, 31.5, 63, 125, and 500 Hz were estimated on the right and left external malleolus using the B&K vibration threshold meter, modified type 1800, and the threshold tracking method. The applied static force could not be controlled. The measurements were repeated twice. VPTs expressed as mean +/- SD were as follows: 8 Hz 109 +/- 3.4 dB, 16 Hz 112 +/- 4.1 dB, 31.5 Hz 116 +/- 6.2 dB, 63 Hz 116 +/- 8.4 dB, 125 Hz 117 +/- 8 dB, 250 Hz 125 +/- 9.3 dB, and 500 Hz 136 +/- 13.1 dB. A nomogram was constructed with reference ranges of VPTs for individual frequencies, from which the profile of vibratory perception thresholds can be seen. Moreover, a global index was calculated as a sum of VPTs for individual frequencies. Its reference value was 840 +/- 52 dB and it varied in repeated measurements by up to 9%. No statistically significant difference of VPTs between the right and left side and between the 1st and 2nd examination was found. A tendency to the increase of VPTs with age was observed, which in males reached statistical significance for frequencies 16, 31.5, 63, and 125 Hz.
目的是获取下肢振动觉阈值（VPT）的正常参考值，并研究VPT与各种生理因素的相关性。30名健康志愿者（10名男性和20名女性）参与了本研究。使用B&K 1800型改良振动阈值仪和阈值跟踪法，分别测定左右外踝处8、16、31.5、63、125和500Hz频率的VPT。施加的静力无法控制。测量重复两次。VPT以平均值±标准差表示如下：8Hz为109±3.4dB，16Hz为112±4.1dB，31.5Hz为116±6.2dB，63Hz为116±8.4dB，125Hz为117±8dB，250Hz为125±9.3dB，500Hz为136±13.1dB。绘制了个体频率VPT参考范围的列线图，从中可以看出振动觉阈值的分布情况。此外，计算了个体频率VPT总和的全局指数。其参考值为840±52dB，重复测量时变化高达9%。左右两侧及第一次和第二次检查之间的VPT无统计学显著差异。观察到VPT随年龄增长有升高趋势，在男性中，16、31.5、63和125Hz频率达到统计学显著水平。
