[Value of measuring resistance of airway for diagnosis of asthma].
Resistance of airway (Raw), sGaw and Maximal expiratory flowvolume curve (MEFV) were measured in 35 normal subject, 43 patients with remission asthma and 100 patients with remission chronic bronchitis (some complicated by obstructive emphysema). The measured values showed that in simple asthma Raw was significantly higher than that in normal subject and in patients with chronic obstructive bronchitis (COB), but MEFV was in normal range. In chronic bronchitis the value of Raw was higher than that in normal subject, but lower than that in asthma (0.05 > P > 0.02); however the FEV1, MMEF, V75 in the curve of MEFV were significantly decreased at the stage of COB, with the most remarkable decrease in MMEF. The results suggest that Raw is a sentitive test for diagnosis of simple asthma, in addition to MEFV measurement; it may be helpful for differential diagnosis of simple asthma and COB and may has potential value for clinical practice.
Yuan
Y
Y
Department of Internal Medicine, Chengdu.
Luo
Y
Y
He
T
T
Zeng
J
J
He
Y
Y
D000328:Adult; D000368:Aged; D000403:Airway Resistance; D001249:Asthma / Q000175:diagnosis* / Q000503:physiopathology; D001991:Bronchitis / Q000175:diagnosis* / Q000503:physiopathology; D003937:Diagnosis, Differential; D004646:Emphysema / Q000175:diagnosis* / Q000503:physiopathology; D005260:Female; D006801:Humans; D008297:Male; D008449:Maximal Expiratory Flow-Volume Curves; D008875:Middle Aged