Presentation on theme: "Occupational vibration syndrome Exposure, standards, surveillance Department of Occupational Medicine Finnish Institute of Occupational Health Markku Sainio."— Presentation transcript:
Occupational vibration syndrome Exposure, standards, surveillance Department of Occupational Medicine Finnish Institute of Occupational Health Markku Sainio Markku Vanhanen
Occupational vibration Periodic motion of a body in alternate opposite directions from a position of rest Mathematical "vector quantity"= described by both a direction and a magnitude –directions of vibration –acceleration Present in most work settings where mechanical equipment is used
Measurements and standards ACGIH TLVs m/s2 < 8 hours a day 6 m/s2 < 6 hours a day 8 m/s2 < 2 hours a day 12 m/s2 < 1 hour a day ISO 5349 (1986) –Standard for measurements over frequencies from 5 to 1500 Hz Mitä laatua käytetään, millaiset tasot aih tautia, impact vibration (high impulsiveness) important!
Dose-response curves and threshold limits are not applicable to all tools –are derived from chain-saw data –do not take into account impulsiveness and high frequency of many tools
Directive 2002/44/EC….. on the minimum health and safety requirements regarding the exposure of workers to the risks arising from physical agents (vibration)... –daily (8 h) exp. limit value 5 m/s2 –daily exp. action limit value 2,5 m/s2
Prevalence of white finger symptoms In Finnish forest workers: – 40% in 1972 –7% in 1980
HAV as occupational disease in Finland RODFIOH (3 yrs)9237
Occupations (FIOH ) Chain saw work 22 Construction worker 17 Miners+ drillers 15 Machine work,-repair, tool makers 10 Welders 6 Pipework 4 Railroad or road work 4 Stonework : dental technician, teacher, painter, manufacture of diff. devices, plastics worker etc.
Exposure Vibration level, acceleration, frequency, impulses Duration, continuity Radiation of the vibration (tool weight, grip strength, hand position, exposure area) Temperature Clothing
Exposure Vibration level of a tool may be difficult to estimate without proper measurements Duties to the manufacturers of tools and to employers on informing and measuring the levels and on employee protection and information
Health surveillance Periodic health examinations in occupational health units at 1-3 year intervals, depending on vibration levels and duration Symptoms Clinical examination If symptoms, referral to FIOH, for example
Prevention Decrease exposure to minimum –technical improvements of tools –minimum exposure time –clothing, gloves, temperature, pauses etc. Maintenance of knowledge on vibration levels of tools in use, especially new ones Stop smoking Periodic health examinations
Prevention Decrease exposure to minimum –technical improvements of tools –minimum exposure time –gloves etc. Maintenance of knowledge on vibration levels of new tools taken into use Temperature Stop smoking Periodic health examinations