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Occupational vibration syndrome Exposure, standards, surveillance

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

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Occupational vibration syndrome Exposure, standards, surveillance

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  1. Occupational vibration syndromeExposure, standards, surveillance Department of Occupational Medicine Finnish Institute of Occupational Health Markku Sainio Markku Vanhanen

  2. 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

  3. Measurements and standards • ACGIH TLVs 1984 • 4 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!

  4. 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

  5. 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

  6. Prevalence of white finger symptoms • In Finnish forest workers: • 40% in 1972 • 7% in 1980

  7. HAV as occupational disease in Finland 1990-2002 RODFIOH • 2001-2002 34 16 • 1999-2000 32 16 • 1997-98 38 17 • 1995-96 37 7 • 1993-94 44 18 • 1990-92 (3 yrs) 92 37

  8. 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 3 1-2 : dental technician, teacher, painter, manufacture of diff. devices, plastics worker etc. Occupations (FIOH 1990-2002)

  9. Exposure • Vibration level, acceleration, frequency, impulses • Duration, continuity • Radiation of the vibration (tool weight, grip strength, hand position, exposure area) • Temperature • Clothing

  10. 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

  11. 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

  12. 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

  13. 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

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