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Hyperinflation of the lungs in coal miners.

Authors
Morgan-WK; Burgess-DB; Lapp-NL; Seaton-A
Source
Thorax 1971 Sep; 26(5):585-590
NIOSHTIC No.
00018902
Abstract
The residual volume and total lung capacity of 1,455 working Pennsylvania coal miners were determined as part of a larger epidemiological study. The age of the subjects varied between 18 and 65 with a mean of 48.7 years. The total lung capacity of the subjects was determined from standard posteroanterior and lateral chest films while the forced vital capacity was determined by spirometry. The effect of increasing radiographic category of simple coal workers' pneumoconiosis on lung volumes was investigated. It was shown that the residual volume increased with radiographic category and that this occurred whether or not the miners had obstructive airway disease. The presence of obstruction had an additional effect over and above that due to coal dust alone, so that the largest increase in residual volume was found in miners who had both obstruction and radiographic evidence of simple coal workers' pneumoconiosis.
Keywords
Respiratory-disorders; Respiratory-function-tests; X-ray-analysis; Coal-mining; Radiography; NIOSH-Author
CODEN
THORA7
Publication Date
19710901
Document Type
Journal Article
Fiscal Year
1971
NTIS Accession No.
NTIS Price
Issue of Publication
5
ISSN
0040-6376
Source Name
Thorax
State
PA
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