先天性外耳道闭锁的多层螺旋CT临床应用价值

目的 探讨多层螺旋CT(MSCT)对先天性外耳道闭锁的临床应用价值.资料与方法 19例(20耳)先天性外耳道闭锁患者行MSCT检查,将所得原始数据传到工作站进行三维重组.结果 外耳道骨性闭锁18耳(90%),膜性闭锁2耳(10%);乳突气房气化良好14耳(70%),气化较差6耳(30%);鼓室发育异常5耳(25%);听小骨畸形11耳(55%);面神经管异常8耳(40%);卵圆窗闭锁5耳(25%);圆窗狭窄1耳(5%);伴内耳畸形3耳(15%).结论 MSCT可明确外耳道闭锁类型、乳突气化情况和鼓室、听小骨、面神经管、卵圆窗、圆窗及内耳结构发育情况,能为先天性外耳道闭锁的临床分型、手术适应证的确定及术式选择提供必要资料.

Clinical Applications of MSCT in Congenital Aural Atresia

Objective To explore the clinical applications of MSCT in congenital aural atresia.Materials and Methods 19 cases(20 ears) with congenital aural atresia were scanned by MSCT and the raw data were processed in workstation for 3D imaging reconstruction.Results Bony atresia was found in 18 ears(90%),membranous atresia in 2 ear(10%),well developed mastoid in 14 ears(70%),underdeveloped mastoid in 6 ears(30%),stenosis of the tympanum in 5 ears(25%),ossicular deformity in 11 ears(55%)and the aberrant facial nerve canal in 8 ears(40%).Malformation with fenestra vestibuli was found in 5 ears(25%),only 1 ear(5%) with fenestra cochleae and 3 ear(15%) with inner ear were detected.Conclusion MSCT can definitely demonstrate congenital aural atresia and the malformation of mastoid,tympanum,ossicle,facial nerve canal,fenestra vestibuli,fenestra cochleae and inner ear,and provide useful information for clinical classification,operative indication and operative approaches.