支气管哮喘有三个相互联系的特征 :自发或药物可逆性气流阻塞、气道高反应性 (ＢＨＲ)和气道炎症。哮喘始动于气道炎症 ,炎症导致病理过程 ,最终出现临床症状。气道炎症被认为是引起气流阻塞和高反应性的基础。哮喘的基本病理特征包括气道壁组织结构破坏增厚、上皮细胞损伤脱落 Bronchial asthma has three interrelated features: spontaneous or drug reversible airflow obstruction, airway hyperresponsiveness (BHR) and airway inflammation. Asthma starts in airway inflammation, inflammation leads to pathological processes, and finally clinical symptoms. Airway inflammation is believed to be the basis for the obstruction of air flow and high reactivity. The basic pathological features of asthma include thickening of the damaged tissue structure of the airway wall and loss of epithelial cells