The expiratory flow parameters (PEF, MMEF, FEV1) of pulmonary function test in CVA were generally normal;these parameters in CAB group, however, were obviously decreased.

• 咳型哮喘组患者的最大呼气流量、最大呼气中段流量和一秒钟用力呼气容积测值基本正常，而慢喘支组则明显下降；