毛细支气管炎为婴儿时期特有的呼吸道疾病。其临床特点一般先有上感症状,数日后突然出现呼气性呼吸困难,喉部有喘鸣音,肺部可闻呼气性哮鸣及不稳定之干湿性罗音,叩诊反晌增强,透视可见肺气肿,一般不发烧或有低热,病程大多在一周左右,绝大多数发生在 Bronchiolitis is a unique respiratory disease of infancy. The general clinical features of the first symptoms, a few days after a sudden expiratory dyspnea, throat wheeze, the lungs can be heard breathless wheezing and instability of the wet and dry rales, percussion anti-nephew enhancement , We can see emphysema perspective, generally no fever or fever, most of the course of a week or so, the vast majority occurred