Changes of the Carbon Monoxide Diffusing Capacity in Complicated Pneumoconiosis

Kim, Young Zun; Kim, Kyoung Ah; Yim, Hyeon Woo; Lim, Young; Yun, Im Goung

doi:1990.37.1.21

Tuberc Respir Dis > Volume 37(1); 1990 > Article

Original Article

Tuberculosis and Respiratory Diseases 1990;37(1):21-28.
DOI: https://doi.org/10.4046/trd.1990.37.1.21 Published online March 1, 1990.

Changes of the Carbon Monoxide Diffusing Capacity in Complicated Pneumoconiosis

Young Zun Kim, Kyoung Ah Kim, Hyeon Woo Yim, Young Lim, Im Goung Yun

Department of Occupational Disease, Catholic University Medical College, Seoul, Korea

복잡진폐증에서 CO확산능의 변화

김영준, 김경아, 임현우, 임영, 윤임중

Abstract

In order to assess the changes of CO diffusing capacity in complicated pneumoconiosis, pulmonary function tests were carried out. The tests include vital capacity, forced expiratory volume in one second, residual volume, total lung capacity and CO diffusing capacity. Control group was 38 healthy male persons and experimental group was devided into category A (1 3 cases), category B (24 cases) and category C (21 cases) according to the international classificaton of radiographs of pneumoconioses. The results were as follows: 1) Vital capacity, forced expiratory volume in one second and CO diffusing capacity were significantly decreased in all experimental group compared with the control. 2) CO diffusing capacity was also significantly reduced in category C than in category A and B. 3) Although vital capacity expressed in percentage of the predicted value was more than 80%, CO diffusing capacity was significantly decreased in the experimental group compared with the control. 4) Percentage of CO diffusing capacity to the predicted value was significantly decreased in all experimental group whose forced expiratory volume in one second was more than 70% of predicted value.