Vibration injuries in Norwegian forest workers

B. Hellstr m, K. L. Andersen
1972 Occupational and Environmental Medicine  
Mjuries in Norwegian forest workers. A free medical examination with compensation for lost earnings was offered to the forest workers in three areas of eastern Norway. Sixty-six per cent attended (413 workers, of whom 296 used chain saws). The prevalence of Raynaud's phenomenon (RP) was 47 % in chain saw operators, 14% in forest workers not exposed to vibration, and 9 % in 302 indoor workers not exposed to vibration. The high prevalence of RP in chain saw operators was attributed to a traumatic
more » ... uted to a traumatic vasospastic disease (TVD). The average time of latency was eight years. The standard symptoms of TVD were attacks of blanching and numbness. Cyanosis and pain occurred rarely. In subsamples, measurements of tactile two-point discrimination and maximal isometric muscle strength (hand grip and finger pressure) as well as x-ray examinations of the wrists and the hands gave no evidence of vibration injury to peripheral nerves, muscles, bones, or joints. The injury threshold for local vibration is poorly defined (Sterner et al., 1950; Axelsson, 1967) , and new, potentially harmful vibratory tools are still on 22 July 2018 by guest. Protected by copyright.
doi:10.1136/oem.29.3.255 fatcat:slqcctrys5dc7kto6okmjzvy2u