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支气管哮喘是一种以气道反应性增高为特点的慢性气道炎症一些临床及试验结果显示哮喘可以以二种形式起病一种是以支气管平滑肌痉挛为主表现为发作性呼吸困难另外一种则以气道炎症刺激为主表现为顽固性咳嗽后者又称咳嗽变异性哮喘由于咳嗽变异性哮喘临床上表现很容易与支气管炎
Bronchial asthma is a type of airway hyperresponsiveness characterized by chronic airway inflammation Some clinical and experimental results show that asthma can occur in two forms One is characterized by bronchial smooth muscle spasm as episodic dyspnea Another The main airway inflammation to stimulate the performance of intractable cough, also known as cough variant asthma due to cough variant asthma clinical manifestations easily with bronchitis