毛细支气管炎（简称毛支）是一种严重危害婴幼儿健康的常见病。发病年龄多为6个月以内的婴儿。临床以急性起病，突然发作性喘憋为特征，严重者可引起心衰、呼衰、缺氧性脑病，甚至导致死亡。因此，迅速有效地控制喘憋症状是本病治疗的关键。多年来，应用肾上腺皮质激素对控制喘 Bronchiolitis (abbreviated hair branch) is a common disease that seriously endanger the health of infants and young children. The age of onset is more than 6 months of infants. Clinical acute onset, sudden onset of wheezing characterized by severe cases can cause heart failure, respiratory failure, hypoxic encephalopathy, and even lead to death. Therefore, the prompt and effective control of wheezing symptoms is the key to the treatment of this disease. Over the years, the application of adrenal cortex hormones to control asthma