Part I: General Observations
AUTOR(ES)
Rivers, D.
RESUMO
Lungs from 45 coalworkers with simple pneumoconiosis have been compared with chest films obtained within two years of death. The carbon, quartz, mica, and kaolin content of the lungs was determined chemically. Large lung sections were used to assess the type and severity of emphysema and the presence of fibrous dust nodules. Histological sections were used to grade the amounts of reticulin and collagen in the simple dust foci. By using averages of four independent readings of each radiograph, subdivisions of the I.L.O. 1950 scale of categories were related to amounts of dust in the lungs.
