Mechanical energy absorption in human fingers exposed to hand-transmitted vibration.
Dong-RG; McDowell-TW; Welcome-D; Wu-JZ; Warren-C; Smutz-WP; Schopper-AW
Biomedical engineering recent developments: proceedings of the Twenty First Southern Biomedical Engineering Conference, September 28 - 29, 2002, Bethesda, Maryland. Vossoughi J, ed. Washington, DC: Medical and Engineering Publishers, Inc., 2002 Sep; :159-160
Vibration white finger (VWF), typically characterized by finger blanching along with tingling and numbness in the hand and fingers, has been associated with extensive exposure to hand-transmitted vibration. Vibration exposure is usually quantified by measuring acceleration on vibrating tools . Vibration energy absorption (YEA) in the fingers may be a significant etiologic factor for VWF and may provide a better quantification of vibration than the tool acceleration spectrum. As the first step to test this hypothesis, a method for measuring the YEA in the fingers was proposed and evaluated in the present study. Six subjects were employed in the evaluation experiment. Constant-velocity (14 mm/s rms) sinusoid accelerations at 10 different frequencies in the range of 16-1000 Hz were used. The characteristics of the YEA measured on the fingers were also compared to those of the YEA measured on the palm of the hand. The results revealed that the finger YEA in the low frequency range (?????25 Hz) was less than that measured on the palm, but finger and palm YEA measurements were comparable at higher frequencies (?????160 Hz). Secondly, the YEA measured on the fingers at frequencies higher than 160 Hz was independent of palm-handle coupling conditions.
Vibration-effects; Vibration-exposure; Cardiovascular-system; Cardiovascular-function; Vibration-disease; Neuromotor-function; Neurological-diseases; Neuromuscular-function
Disease and Injury: Musculoskeletal Disorders of the Upper Extremities; Research Tools and Approaches: Control Technology and Personal Protective Equipment
Biomedical engineering recent developments: proceedings of the Twenty First Southern Biomedical Engineering Conference, September 28 - 29, 2002, Bethesda, Maryland