Maximal expiratory flow-volume patterns in allergic rhinitis. Characteristic flow-volume patterns of the lower airways.
On 37 patients with nasal allergy and 37 non-smoking healthy volunteers, maximal expiratory flow-volume curve and volume-time curve were obtained. To find the characteristic flow changes, the flow curves were classified into five patterns from type A to type E. The results showed that the incidence of type A was significantly lower in patients with nasal allergy than in the control group, while the rate of type E was significantly higher at 46% and the rate of type B was particularly high (32.4%) in the patient group. It was demonstrated that 77% of the subjects provided B or C flow-volume curves, while those with pale nasal mucous membranes developed D and E formats. In patients with nasal allergy, these patterns are useful in diagnosing remarkable differences in the lower airways.
Nishioka
K
K
Department of Otolaryngology, Okayama University Medical School, Japan.
Meguro
T
T
Masuda
Y
Y
Date
R
R
Ogura
Y
Y
D000293:Adolescent; D000328:Adult; D002648:Child; D002908:Chronic Disease; D005260:Female; D005541:Forced Expiratory Volume; D006801:Humans; D008297:Male; D008449:Maximal Expiratory Flow-Volume Curves; D008875:Middle Aged; D009297:Nasal Mucosa / Q000503:physiopathology; D012221:Rhinitis, Allergic, Perennial / Q000145:classification / Q000503:physiopathology*