支气管哮喘(简称哮喘)是常见的慢性呼吸系统疾病,不同国家之间哮喘患病率差异较大,但总体呈上升趋势。目前世界上至少有3亿哮喘患者,至2025年可能新增加1亿,儿童哮喘增加尤其明显[1]。我国在1990年、2000年、2010年共进行三次大规模城市儿童哮喘患病率调查,结果分别为0.96%、1.66%和2.38%,上升趋势显著[2]。近年来,关于儿童哮喘的诊断、治疗水平虽然有很大提高,但是因哮喘发作所带来的沉重负担并没 Bronchial asthma (referred to as asthma) is a common chronic respiratory disease, asthma prevalence varies widely among countries, but the overall upward trend. At present, there are at least 300 million asthma patients in the world and a new 100 million may be added by 2025, especially in children with asthma [1]. In 1990, 2000 and 2010, China conducted a total of three large-scale urban children asthma prevalence survey, the results were 0.96%, 1.66% and 2.38%, a significant upward trend [2]. In recent years, the diagnosis and treatment of childhood asthma have greatly improved the level of treatment, but due to the heavy burden of asthma attacks did not