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J Occup Health year 2007 volume 49 number 3 page 165 - 171
Classification Original
Title Assessing the Influence of Antivibration Glove on Digital Vascular Responses to Acute Hand-arm Vibration
Author Md H. MAHBUB, Kenjiro YOKOYAMA, Md S. LASKAR, Masaiwa INOUE, Yukio TAKAHASHI, Shinji YAMAMOTO and Noriaki HARADA
Organization Department of Hygiene, Yamaguchi University School of Medicine, Japan
Keywords Finger vascular response, Influence, Vibration, Antivibration glove
Correspondence N. Harada, Department of Hygiene, Yamaguchi University School of Medicine, 1-1-1, Minami-Kogushi, Ube, Yamaguchi 755-8505, Japan (e-mail: harada@yamaguchi-u.ac.jp)
Abstract Assessing the Influence of Antivibration Glove on Digital Vascular Responses to Acute Hand-arm Vibration: Md H. MAHBUB, et al. Department of Hygiene, Yamaguchi University School of Medicine-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/s2. 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.