患儿,男,1岁,因呼吸困难2个月余,加重4 d入院。患儿于2个月前无明显诱因出现痰鸣音及轻度呼吸困难,在当地医院就诊,疗效不明显,病情迁延。1个月前患儿呼吸困难加重急诊入省级医院,以“肺炎”给予抗炎对症处理后病情缓解,2周后出院。出院后第2天,患儿因再次出现痰鸣音及呼吸困难 Children, male, 1 year old, more than 2 months due to dyspnea, increased 4 d admission. Children 2 months ago, there was no obvious incentive to phlegm and mild dyspnea, treatment at a local hospital, the curative effect is not obvious, the condition is delayed. 1 month ago, children with dyspnea increased emergency access to the provincial hospital to “pneumonia” to give anti-inflammatory symptomatic treatment of remission, 2 weeks after discharge. On the second day after discharge, the patient was again suffering from phonation and dyspnea