支气管哮喘是嗜酸性粒细胞、肥大细胞和 T 淋巴细胞等多种炎症细胞参与的气道慢性炎症。表现为反复发作的阵发性呼吸困难,常在夜间和(或)清晨发作、加剧。常出现广泛多变的可逆性气流受限。根据全球性哮喘防治建议(GINA),重度至危重度患者可持续雾化吸入β_2受体激动 Bronchial asthma is a chronic airway inflammation involving a variety of inflammatory cells such as eosinophils, mast cells and T lymphocytes. Symptoms of recurrent episodes of paroxysmal dyspnea, often at night and (or) early morning seizures, intensified. Often there is a wide range of reversible airflow limited. According to the Global Recommendations for Gallstone Prevention and Treatment (GINA), patients with severe to critically ill inhaled inhalation of beta 2 receptor agonism