新生儿中先天性后鼻孔闭锁的发生率约为１／５０００～８０００，病因发生迄未全明，大多认为系先天发育缺陷，常伴有其他发育畸形。闭锁可为骨性（占９０％）、膜性或混合性；可为完全性或不完全性；单或双侧。女比男多２倍。单侧不完全闭锁常漏诊，凡有阵发性窒息表现的新生 Neonates congenital posterior nosocomial atresia incidence of about 1/5000 ~ 8000, the cause has not yet fully understood, most of them are congenital defects, often accompanied by other developmental deformities. Blockage can be skeletal (90%), membranous or mixed; can be complete or incomplete; single or bilateral. 2 times more women than men. Unilateral incomplete often missed diagnosis, where the performance of paroxysmal asphyxia new students