气管支气管异物是小儿常见的急重症之一 ,多见于 5岁以内婴幼儿。小儿气管支气管异物可分为两大类。一类为不透Ｘ线的金属性异物 ,另一类可透Ｘ线的非金属性异物。对于前者可通过Ｘ线检查直接观察到异物的大小 ,形态及停留的部位 ,其诊断较容易 ,而后者通过Ｘ线检查不能直接观 Tracheobronchial foreign body is one of the common acute severe illness in children, more common in infants and children less than 5 years old. Pediatric tracheobronchial foreign body can be divided into two categories. One kind of metal foreign matter that is not transparent X-ray and the other non-metallic foreign matter that can be X-ray transparent. The former can be directly observed by X-ray examination of foreign body size, shape and the site of stay, the diagnosis is easier, and the latter can not directly through the X-ray examination