title: Single breath test of ventilation and perfusion distribution compared with other tests in evaluation of chronic bronchitis and emphysema.
mesh_terms: D000328:Adult; D000368:Aged; D001784:Blood Gas Analysis; D001991:Bronchitis / Q000503:physiopathology*; D002908:Chronic Disease; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D011656:Pulmonary Emphysema / Q000503:physiopathology*; D014692:Ventilation-Perfusion Ratio