To study exposure to cobalt and chromium in saw maintenance rooms and test respiratory health among saw filers at lumber mills.
Hard-metal lung disease is associated with cobalt in the manufacture of tungsten carbide tools ; recently it has also been reported among tool maintenance workers.
Lumber mills often use saws tipped with tungsten carbide or with a newer alloy, stellite (containing more cobalt, as well as chromium).
Methods-A cross sectional study of 118 saw filers at eight lumber mills was carried out that included a standardised questionnaire, spirometry, personal air sampling, and examination of tasks every 10 minutes (by observation).
Comparison data were from a study ofbus mechanics tested with similar methods.
Results and Conclusion-Cobalt exposure was associated with tungsten carbide grinding but not with stellite grinding.
Chromium exposure was associated mainly with stellite welding.
Saw filers had a twofold increase in phlegm and wheeze (P<0.01) and a threefold increase in cough, phlegm, and wheeze related to work (P<0.001), but no increase in breathlessness.
Mots-clés Pascal : Tungstène carbure, Scierie, Exposition professionnelle, Homme, Toxicité, Cobalt, Métal fritté, Poumon, Médecine travail, Appareil respiratoire pathologie
Mots-clés Pascal anglais : Tungsten carbide, Saw mill, Occupational exposure, Human, Toxicity, Cobalt, Sintered metal, Lung, Occupational medicine, Respiratory disease
Notice produite par :
Inist-CNRS - Institut de l'Information Scientifique et Technique
Cote : 95-0201441
Code Inist : 002B03L05. Création : 09/06/1995.