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MAP20071017520Follow-up study on the lung retention of welding fumes among shipyard welders / Pirkko-Liisa Kalliomäki... [et al.]Sumario: Lung retention and clearance of welding fumes were followed during the years 1976-1982 among 48 shipyard arc welders. The subjects were divided into four groups according to their average exposure time, which varied from 3 to 49 yr. The amount of lung-retained dust was estimated using magnetopneumography. The results indicate that the average clearance rate was 20% per yr. The individual clearances varied between 10 and 30% per yr. Improvements in hygiene in the shipyard were clearly seen in the changes of lung retention ratesEn: The Annals of occupational hygiene. - Oxford [etc.]. - nº 4, 1983 ; p. 449-4521. Higiene industrial. 2. Contaminantes químicos. 3. Humos tóxicos. 4. Soldadura por arco. 5. Enfermedades profesionales. 6. Enfermedades pulmonares. 7. Astilleros. I. Kalliomäki, Pirkko-Liisa. II. Título. III. Título: The Annals of occupational hygiene.