哮喘是儿童时期最常见的慢性呼吸道疾病,其发病率发达国家高于发展中国家,城市高于农村,我国约有哮喘患儿1.6亿。儿童哮喘如诊治不及时,病程的延长可产生气道不可逆性狭窄和气道重塑。吸入型糖皮质激素是哮喘长期控制的首选药物,也是目前最有效的抗炎药物,其优点是通过吸入药物 Asthma is the most common chronic respiratory disease in childhood. Its incidence is higher in developing countries than in developing countries, and its population in urban areas is higher than that in rural areas. About 160 million children suffer from asthma in our country. Childhood asthma, such as diagnosis and treatment is not timely, the extension of the course of the airway can produce irreversible stenosis and airway remodeling. Inhaled glucocorticoid is the drug of choice for the long-term control of asthma and is by far the most effective anti-inflammatory drug with the advantage that by inhaling the drug