通过观察因咳嗽和（或）喘息进行组胺激发试验８０８例患者的Ｆ－Ｖ曲线，发现支气管激发试验阴性的患者有４６％在Ｆ－Ｖ曲线呼气相低容量位出现小平台状改变，而支气管激发试验阳性的患者仅有８％出现小平台状改变，两者差异显著（Ｐ＜００５）。这些有小平台状改变、支气管激发试验阴性的患者，在进行激发试验过程中容易出现咽喉部刺激症状。发现在测定气道反应性过程中，对Ｆ－Ｖ曲线的形态作深入认识，可以帮助临床诊断，提高诊疗水平 By observing the F-V curves of 808 patients who underwent histamine challenge tests for cough and / or wheezing, 46% of those with a bronchial provocation test found a small plateau-like change in the F-V curve at the low end of the expiratory phase, Only 8% of patients with positive bronchial provocation test showed a small plateau-like change, with significant difference (P <005). These patients with small platform-like changes, bronchial provocation test negative, prone to throat irritation during the excitation test. Found in the determination of airway responsiveness, the form of F-V curve for in-depth understanding, can help clinical diagnosis, improve diagnosis and treatment