Abstract
Screening spirometry of river transport workers was performed. From 1536 tests, the obstructive disorders corresponding functional diagnosis of COPD are revealed in 219 cases. From them of 66,2% it was necessary on patients with FEV1≥ 80%, FEV1/FVC ≤70%. Results of research prove, that spirometry as routine inspections allows to reveal COPD patients at early stages of disease before development of clinical complaints.