[Lung dysfunction in patients with mild chronic obstructive bronchitis].
VC, FVC, FEV1, FEV1/VC%, PEF, MEF25, MEF50, MEF75, TCL, TGV, RV, Ravt, Riin, Rex, DLCO-SS, PaO2, and PaO2 were determined in 33 patients with mild chronic obstructive lung disease (FEV1 > 70% of the normal value). All the patients were found to have impaired bronchial patency; most (63.6%) patients had lung volume and capacity changes, almost half (45.5%) the patients had pulmonary gas exchange dysfunction. Impaired bronchial patency mainly appeared as decreased MEF50, MEF15, and FEV1/VC%; altered lung volumes and capacities manifested chiefly by increased RV and decreased VC; pulmonary gas exchange dysfunction showed up primarily as lowered PaO2. The magnitude of the observed functional changes was generally slight. MEF50, MEF75, FEV1/VC%, and VC dropped to 59-20 and 79-70% of the normal value, respectively. RV increased up to 142-196% of the normal value; PaO2 reduced up to 79-60% mm Hg.
V B
VB
Nefedov
L A
LA
Popova
E A
EA
Shergina
D000328:Adult; D029481:Bronchitis, Chronic / Q000188:drug therapy / Q000453:epidemiology / Q000503:physiopathology*; D001993:Bronchodilator Agents / Q000627:therapeutic use; D005260:Female; D006801:Humans; D008168:Lung / Q000503:physiopathology*; D008297:Male; D008875:Middle Aged; D029424:Pulmonary Disease, Chronic Obstructive / Q000188:drug therapy / Q000453:epidemiology / Q000503:physiopathology*; D012426:Russia / Q000453:epidemiology; D012720:Severity of Illness Index; D012907:Smoking / Q000453:epidemiology
D001993:Bronchodilator Agents