儿空卢门狭窄可有先天与后天性一＊11。前者乃因环状软骨发有差，声门下腔隙小，但形态无异常，程空轻、易处理、后果较好；后者大多由气管内插管致粘膜损伤、炎症导致粘膜下疤痕组织形成所致，程度较重、处理困难。处理方法较多，1980年前有反复喉扩张、C0。激光下术、皮质类 Narrow Narrow children may have innate and acquired a * 11. The former is due to the poor quality of the annular cartilage, subglottic lacunar small, but no abnormal morphology, light air space, easy to handle, the result is better; the latter mostly caused by endotracheal tube mucosal injury, inflammation caused by submucosal scar formation To a heavy degree, difficult to deal with. More ways to deal with, before 1980, repeated throat expansion, C0. Laser surgery, cortex