Neurological and functional effects of short-term exposure to hand-arm vibration
Neurological and functional effects of short-term exposure to hand-arm vibration
复制标题
DOI：
10.1007/s004200050280
复制
发表时间：
1998-06-01
影响因子：
3
通讯作者：
de Schaetzen, D
中科院分区：
文献类型：
--
作者：
Malchaire, J;Diaz, LSR;de Schaetzen, D
目的：本研究的目的是量化的感觉和功能的影响，导致短期（30分钟）暴露于手臂振动。受试者和方法：9名受试者进行了9项实验室实验。在32分钟内，他们抓住以三种不同振幅（5，20和80 ms（-2））和三种频率（31.5，125和500 Hz）振动的手柄。此外，进行了一项参考实验，其中手柄不振动。三个感官测试[振动知觉阈值（VPT），压力知觉阈值（PPT），和远端感觉潜伏期时间（DSL）]，两个功能测试[普渡钉板（PPB）和最大随意力（MVF）]，和一份关于感觉异常和麻木的问卷，在暴露前，暴露期间和暴露后完成。结果如下：32分钟的振动暴露会导致VPT的暂时性阈值偏移（TTS），并导致感觉异常和麻木。的VPT出现根据一阶模型的时间常数约等于3分钟的曝光时间而变化。TTS的增加与振动加速度的振幅和大于为31.5或500 Hz的曝光频率为125 Hz。在测试频率125 Hz时，它也比在31.5 Hz时大。其他试验未显示任何显著变化。特别是，PPB测试没有表现出任何灵活性的损失。结论：暴露于振动约30分钟后，VPT增加，感觉异常和麻木发展。然而，这些似乎不会对工作能力或业绩产生重大影响。
Objective: The aim of the present study was to quantify the sensory and functional effects resulting from a short-duration (30 min) exposure to hand-arm vibration. Subjects and methods: Nine subjects went through nine laboratory experiments. For 32 min they grasped a handle vibrating at three different amplitudes (5, 20, and 80 ms(-2)) and at three frequencies (31.5, 125, and 500 Hz). Additionally, a reference experiment was conducted in which the handle did not vibrate. Three sensory tests [vibration perception threshold (VPT), pressure perception threshold (PPT), and distal sensory latency time (DSL)], two functional tests [Purdue peg-board (PPB) and maximal voluntary force (MVF)], and a questionnaire concerning the perceived paresthesia and numbness were completed before, during, and after exposure. Results: A 32-min period of exposure to vibration leads to a temporary threshold shift (TTS) of the VPT and to the development of paresthesia and numbness. The VPT appears to vary with the exposure duration according to a first-order model with a time constant about equal to 3 min. The TTS increases with the vibration acceleration amplitude and is greater for an exposure frequency of 125 Hz than for that of 31.5 or 500 Hz. It is also greater at the test frequency 125 Hz than at 31.5 Hz. The other tests do not demonstrate any significant variation. In particular, the PPB test does not demonstrate any loss of dexterity. Conclusion: After some 30 min of exposure to vibration the VPTs are increased and paresthesia and numbness develop. However, these do not appear to influence significantly the capacity or performance at work.