Acute changes in vascular function induced by vibration may be eliminated by the use of anti-vibration materials

Details

• Personal Author:
  Dong, Ren G. ; Johnson C ; Krajnak, Kristine M. ; Miller, G. Roger ; Warren C ; Waugh, Stacey ; Welcome, Daniel E. ; Xu S
• Description:
  Occupational exposure to hand-arm vibration through the use of powered hand tools may result in cold-induced reductions in peripheral blood flow that result in vasospasms, along with finger and hand blanching. In humans and rat models, exposure to single bouts of vibration can induce a transient vasoconstriction. Animal studies have demonstrated that this constriction is associated with a short-term increase in the sensitivity of peripheral arteries to vasoconstricting factors (i.e., alpha2C-adrenoreceptormediated), and a delayed reduction in sensitivity to acetylcholine (ACh)-induced re-dilation. Recent evidence suggests that the reduction in the ability of ACh to induce vasodilation may be maintained for as long as 7 days following a single exposure to vibration. Therefore, protecting workers against the negative health effects of vibration is critical. One method that has been used to protect workers against vibration-induced injuries is to have them wear anti-vibration gloves. However, a number of studies have found that anti-vibration gloves may not protect the hands of workers. In fact, the resonant frequency of some anti-vibration materials used in gloves is in the same range as the resonant frequency of human fingers. Because the risk of developing vascular disorders seems to be greatest at frequencies that induce the greatest bending and shear stress on the tissues of the fingers, it is possible that using anti-vibration (AV) gloves may actually increase the risk of developing vibration-induced disorders. We have developed a rat-tail model of vibration-induced vascular injury that shows similar biodynamic properties to the human finger. In this study, we used this model to test the hypothesis that vibration-induced changes occurring after a single exposure to vibration may actually be worse when AV materials are used to buffer the transmission of vibration to the tail. [Description provided by NIOSH]
• Subjects:
  Blood Cold Temperature Environmental Monitoring Laboratories Musculoskeletal System Occupational Health Personal Protective Equipment Safety Vibration
• Keywords:
  Analytical-instruments Analytical-models Arm-injuries Biodynamics Blood-vessels Cholinergic-receptors Cold-stress Equipment-design Equipment-reliability Exposure-assessment Gloves Hand-injuries Injury-prevention Laboratory-animals Laboratory-testing Lasers Performance-capability Peripheral-motor-system Peripheral-nervous-system Personal-protective-equipment Physiological-response Physiological-stress Physiological-testing Vasomotor-system Vasomotor-system-disorders Vibration-effects Vibration-exposure Vibration-pickups

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• Publisher:
  University of Guelph
• Document Type:
  Text
• Genre:
  Abstract or Summary
• Place as Subject:
  OSHA Region 3 ; West Virginia
• CIO:
  National Institute for Occupational Safety and Health (NIOSH)
• Division:
  HELD - Health Effects Laboratory Division
• Topic:
  Workplace Safety & Health
• Location:
  North America
• Pages in Document:
  9-10
• NIOSHTIC Number:
  nn:20045713
• Citation:
  Human vibration - from theory to industrial and clinical applications, proceedings of the fifth American Conference on Human Vibration, June 10-13, 2014, Guelph, Ontario, Canada. Oliver M, ed. Guelph, Ontario, Canada: University of Guelph, 2014 Jun; :9-10
• Editor(s):
  Oliver M
• Federal Fiscal Year:
  2014
• Peer Reviewed:
  False
• Source Full Name:
  Human vibration - from theory to industrial and clinical applications, proceedings of the fifth American Conference on Human Vibration, June 10-13, 2014, Guelph, Ontario, Canada
• Collection(s):
  National Institute for Occupational Safety and Health
• Main Document Checksum:
  urn:sha-512:dbf32f145394041c00f877d60483dd5fcb696d2aad916680d0535c34168a374cd0070f7c587a485ada0b59f5eb15d3c851efef757db7e62fc8391ab97d8a89e3
• Download URL:
  https://stacks.cdc.gov/view/cdc/201027/cdc_201027_DS1.pdf
• File Type:
  [PDF - 306.01 KB ]