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Chest, Vol 97, 845-849, Copyright © 1990 by American College of Chest Physicians

ARTICLES

Emphysematous change in chronic asthma in relation to cigarette smoking. Assessment by computed tomography

Y Kondoh, H Taniguchi, S Yokoyama, F Taki, K Takagi and T Satake
Department of Internal Medicine, Faculty of Medicine, University of Nagoya, Japan.

To evaluate the occurrence and the degree of emphysema in chronic asthma in relation to the effect of cigarette smoking, we examined 35 subjects with irreversible airway obstruction (17 nonsmokers and 18 smokers). We performed pulmonary function testing and CT scans on all subjects. The ES was assessed by a visual scoring system on CT scans. Between nonsmokers and smokers, there was a significant difference in the ES (p less than 0.05), but not in the FEV1, TLC, and Dsb/VA (expressed as percent predicted values). The ES was 2.3 +/- 4.7 percent (mean +/- SD) in nonsmoking subjects and 13.7 +/- 16.7 percent in smoking subjects. In all subjects the ES showed significant correlations with Dsb/VA (p less than 0.001) and pack-years of cigarette consumption (p less than 0.001) but did not show correlations with FEV1 and with TLC. We concluded that emphysema can occur in smoking asthmatic subjects because of the effect of cigarette smoking, and CT scans are useful for detecting this emphysematous change.


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L.-P. Boulet, C. Lemiere, F. Archambault, G. Carrier, M. C. Descary, and F. Deschesnes
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Corrigenda for vol. 155, p. 1367
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[Full Text]


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