支气管炎常继发于上呼吸道感染,常见的病因是病毒与细菌混合感染。小儿支气管管腔狭窄,软骨柔软,缺乏弹性组织,粘液腺分泌不足,粘膜纤毛运动差,不易清除微生物和粘液[1]。同时,本地处于边远地区,海拔2700m,气候较干燥,单纯采用药物治疗支气管炎,许多小儿咳嗽症状持续时间较长。 Bronchitis often secondary to upper respiratory tract infection, the common cause is mixed infection with bacteria and bacteria. Pediatric bronchial stenosis, soft cartilage, the lack of elastic tissue, lack of mucus gland secretion, poor mucociliary movement, easy to remove microorganisms and mucus [1]. At the same time, the local is in remote areas, 2700m above sea level, the climate is dry, simple treatment of bronchitis drugs, many children with cough longer duration.