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Physiopathologie du syndrome de Raynaud d'origine vibratoire
Près d'un salarié sur cinq déclare être exposé aux vibrations au moins un quart de son temps de travail dans l'Union européenne. Le syndrome des vibrations main-bras susceptible d'en résulter est une pathologie complexe, dont la physiopathologie n'est pas encore totalement connue, associant des signes neurologiques, vasculaires et/ou ostéo-articulaires. Des travaux de recherche visent à mieux connaître la relation entre l'exposition aux vibrations mainbras et leurs effets sur les troubles angioneurotiques du...
Comparative analysis of exposure limit values of vibrating hand-held tools
In the European Union, one of every four workers claims to be exposed to vibration for up to 2 h of his/her working day. The use of vibrating hand-held tools is the most common cause of vibration-related injury in workers. Of all sectors of professional activity, the construction industry has the highest number of workers affected by vibration. European Directive 2002/44/EC on the minimum health and safety requirements regarding worker exposure to risks from physical agents (e.g. vibration) limits exposure to vibration.This study analysed the exposure level of construction workers to hand-arm vibration...
For certain types of shocks, acute reductions in finger blood flow can be predicted from the rms acceleration.
This study investigated how reductions in finger blood flow depend on shock repetition rate and the peak and rms magnitude of acceleration. Different repetition rates (1.3-83.3 s(-1)) and different peak magnitudes (10-88 ms(-2) peak) but the same rms acceleration (10 ms(-2) rms) caused similar decreases in blood flow in fingers on exposed and unexposed hands. Shocks with a 83.3 s(-1) repetition rate, peak magnitude of 10 ms(-2) and rms acceleration of 10 ms(-2) provoked greater reduction in finger blood flow than shocks with the same peak magnitude but lower repetition rate (21 or 5.3 s(-1)) and...
Employees affected by the vibrations of air chisels : The UK vehicule manufacturer was prosecuted.
Two employees in the weld destruct section where air chisels were used to undo welds on cars to test the strength of them developped Hand Arm Vibration Syndrome (HAVS) in December 2006. The subsequent investigation by HSE found that vibrating hand tools were being used across the plant with a lack of assessment and management of risk and when a health surveillance regime was then made effective, other cases came to light. There was no system in place to measure how long was being spent using the tools by each employee or the levels of vibration. The recommended amount of time for one of the tools...
United Kingdom: Council prosecuted after worker loses movement in hands.
Cheshire East Council was prosecuted by the Health and Safety Executive (HSE), United Kingdom, after a 56-year-old mechanic developed a severe form of hand arm vibration syndrome. Since 1984, the worker regularly used heavy-duty vibrating equipment, including pneumatic drills and hand-held grinders. The investigation inspector at HSE explained: "The worker was first diagnosed as developing hand arm vibration syndrome in 2005 but the council failed to take any significant action for nearly four years to stop the condition getting worse. The council should have limited the amount of time he...
Will brain plasticity be used to improve sensory hand function and diminish disability in vibration induced hand problems?
The well-developed feedback system between the hand and the brain, with continuous proprioception and tactile input that are coordinated with memory systems in the brain, is a prerequisite for regulation of grip force and grip speed. A reorganisation of the cortical hand map can be found after long term work with hand-held vibrating tools; in such situations the cortical hand map is distorted and rearranged into a disorganized pattern. This case series shows that repeated cutaneous forearm anaesthesia over an eight-week period can improve hand function, focusing on sensation. With booster doses...

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