支气管哮喘急性发作持续24小时以上用一般平喘药物治疗未能控制者,称为哮喘持续状态。病死率较高,国内有人报道病死率为5％左右。国外报告其住院死亡率为9～38％,美国每年亦有数千人死于哮喘持续状态。因此,进一步提高对哮喘持续状态的救治水平具有重要的临床意义。哮喘诱发因素许多因素均可诱发哮喘持续状态,常见原因:支气管感染、环境因素的刺激或过敏原的持续存在导致支气管痉挛、粘膜水肿、 Bronchial asthma attacks lasting more than 24 hours with general antiasthmatic drugs failed to control the treatment, known as asthma persistence. High mortality rate, some people reported that the case fatality rate is about 5%. Foreign reports of its in-hospital mortality rate of 9 to 38%, the United States thousands each year also died of asthma sustained state. Therefore, to further improve the treatment of asthma sustained state has important clinical significance. Asthma-inducing factors Many factors can induce asthma persistence, common causes: bronchial infection, environmental factors or the persistence of allergens lead to bronchospasm, mucosal edema,