Mahbub Md H, Yokoyama Kenjiro, Laskar Md S, Inoue Masaiwa, Takahashi Yukio, Yamamoto Shinji, Harada Noriaki
Department of Hygiene, Yamaguchi University School of Medicine, Ube, Yamaguchi, Japan.
J Occup Health. 2007 May;49(3):165-71. doi: 10.1539/joh.49.165.
This study was designed to assess the influence of an antivibration glove on digital vascular responses in healthy subjects exposed to short-term grasping of a vibrating handle. To measure finger blood flow (FBF) and finger skin temperature (FST) once at the end of every min, a blood flowmeter sensor was attached to the dorsum and a thermistor sensor was attached to the medial surface of the subject's middle phalanx of the third finger of the right hand. After 5 min of baseline measurements without or with an antivibration glove meeting ISO standard 10819, worn on the right hand, subjects gripped a vibrating handle with the same hand for a period of 5 min. Vibration was generated at two frequencies of 31.5 Hz and 250 Hz with a frequency weighted rms acceleration of 5.5 m/s(2). FBF and FST continued to be recorded for a further 5 min after release of the vibrating handle. Statistical analysis showed no significant change after vibration exposure in either FST or FBF at 250 Hz, compared to baseline (control) measurements while using the antivibration glove. At 31.5 Hz, FBF data exhibited a significant difference between before and after grasping of vibrating handle, which was less under the condition of wearing the antivibration glove than under the condition of bare hand. The results provide evidence that the antivibration glove considerably influenced finger vascular changes in healthy subjects induced by vibration exposure, especially against high frequency vibration. Further studies are required to assess finger vascular responses to hand-transmitted vibration with antivibration gloves of different manufacturers.
本研究旨在评估防振手套对接触短期握持振动手柄的健康受试者手指血管反应的影响。为了每隔1分钟末测量一次手指血流量（FBF）和手指皮肤温度（FST），将血流量传感器附着于受试者右手无名指中节指骨的背侧，将热敏电阻传感器附着于其内侧表面。在右手佩戴或不佩戴符合ISO标准10819的防振手套进行5分钟的基线测量后，受试者用同一只手握住振动手柄5分钟。以31.5 Hz和250 Hz两个频率产生振动，频率加权均方根加速度为5.5 m/s²。松开振动手柄后，继续记录FBF和FST 5分钟。统计分析表明，与使用防振手套时的基线（对照）测量相比，250 Hz振动暴露后FST或FBF均无显著变化。在31.5 Hz时，握持振动手柄前后的FBF数据存在显著差异，戴防振手套时的变化小于裸手时的变化。结果表明，防振手套对振动暴露引起的健康受试者手指血管变化有显著影响，尤其是对高频振动。需要进一步研究来评估不同制造商的防振手套对手传振动的手指血管反应。
