支气管哮喘是由嗜酸性粒细胞、肥大细胞和 T淋巴细胞等多种炎性细胞参与的气道慢性炎症性疾病。我国儿童哮喘调查显示其患病率约为 0 .5%～ 2 % ,个别地区则高达约 5%。目前哮喘的抗炎及抑制性介质释放作用效果最佳的是肾上腺皮质激素 ,吸入激素可使药物达到气道粘膜的靶细胞 , Bronchial asthma is a chronic inflammatory disease of the airways involved in a variety of inflammatory cells such as eosinophils, mast cells and T lymphocytes. A survey of children’s asthma in China shows a prevalence of about 0.5% -2%, while in some areas it is as high as about 5%. Current anti-inflammatory and inhibitory media release of asthma is the best effect of adrenal cortical hormone, inhaled hormones can make drugs reach the airway mucosa of target cells,