支气管哮喘为呼吸系统的常见病,并且病情危重,易复发,而支气管哮喘持续状态则常是导致病人死亡的主要原因。所谓支气管哮喘持续状态是指哮喘发作后虽经支气管扩张剂及激素等各种治疗,呼吸困难状态仍持续12-24小时以上者;支气管哮喘诱发因素较多,也较复杂,但病理改变主要是过敏物 Bronchial asthma is a common respiratory disease, and critically ill, easy to relapse, and bronchial asthma persistence is often the leading cause of death of patients. The so-called bronchial asthma persistence refers to the asthma attacks despite the bronchodilators and hormones and other treatment, breathing difficulties persist for more than 12-24 hours; bronchial asthma predisposing factors are more complicated, but the main pathological changes are Allergy