The value of residual volume testing in determining degree of emphysema in patients with pneumoconiosis
Wang, M.; Wang, X.; Wang, X.; Wang, Z.; Zhan, C.
Hua Xi Yi Ke Da Xue Xue Bao 22(2): 185-188
1991
ISSN/ISBN: 0257-7712 PMID: 1786957 Document Number: 379269
A comparative study of chest roentgenograms and the value of RV/TLC% in determining degree of emphysema of patients with pneumoconiosis and workers exposed to dust was made in 400 cases. Accordance rate of RV/TLC% with roentgenograms in determining emphysema in the same subjects was 61.1%, and that in the patients group, 67.7%. Moreover, the accordance rate increased with grade of pneumoconiosis diagnosed. The results showed that RV/TLC% was valuable in determining emphysema of patients with pneumoconiosis. The classes of degree of emphysema were proposed according to the testing value of RV/TLC%.