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KMID : 0383820090660040288
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Tuberculosis and Respiratory Diseases
2009 Volume.66 No. 4 p.288 ~ p.294
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The Correlation of Dyspnea and Radiologic Quantity in Patients with COPD
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Jung Eun-Jung
Kim Yang-Ki
Lee Young-Mok
Kim Ki-Up
Uh Soo-Taek
Kim Yong-Hoon
Kim Do-Jin
Park Choon-Sik
Hwang Jeong-Hwa
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Abstract
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Background: A lung hyperinflation, or air trapping, caused by expiratory flow-limitation contributes to dyspnea
in patients with chronic obstructive pulmonary disease (COPD). Forced expiratory volume in 1 second (FEV1) has served as an important diagnostic measurement of COPD, but does not correlate with patient-centered outcomes such as dyspnea. Therefore, this study was performed to investigate the role of radiologic quantity in evaluating the dyspnea in patients with COPD by measuring lung hyperinflation in chest x-ray and high resolution chest tomography (HRCT).
Methods: Fifty patients with COPD were enrolled in this study. Their subjective dyspnea score (modified Borg
scale dyspnea index), spirometry, and lung volume were measured. Simultaneous hyperinflations of chest x-ray score (“chest score”) and degree of emphysema of HRCT (“HRCT score”) were measured. The “chest score” were composed of lung length, retrosternal space width, and height of the arc of the diaphragm and “HRCT score” were composed of severity and extent of emphysema.
Results: The mean age of patients was 69 years old and their mean FEV1 was 51.7%. The Borg score ignificantly
correlated with parameters of spirometry and lung volume, including FVC, FEV1, FEV1/FVC, RV, RV/TLC, and DLCO.
The Borg score correlated well with “HRCT score”, but did not correlate with “chest score”. Also, the Borg scale correlates inversely with body mass index.
Conclusion:The quantity of emphysema on chest HRCT may serve as an objective marker of dyspnea in patients
with COPD.
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KEYWORD
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Dyspnea, Chronic obstructive pulmonary disease, Radiology
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