Objective To evaluate the value of DR internal auditory canal (DR-IAC) and MSCT three-dimen-sioned reconstruction in the post-operative assessment of cochlear implantation. Methods During the period of January 2012 through June 2015, 46 cases of cochlear implant recipients were involved in this study in the 303th Chinese People's Liberation Army Hospital. All of them underwent imaging and acoustics examination and DR otoscopy. Results For-ty-three cases of DR-IAC showed that working electrodes were fully implanted along the cochlea with spiral natural bent, no slippage or distortion. Two cases of DR-IAC showed that working electrodes were not fully implanted, and acoustic impedance worked regularly inter-operatively. The appropriate impulsion of neural response telemetry could lead to oscillogram post-operatively. One case of type Mickel in congenital development, and MSCT re-implantation showed the deep location and slippage in the scala tympani, distortion in the bottom and migration part of the cochlear duct, and the electrode did not work and failed to complete the acoustic detection in this case. Five cases of CT showed continuous cochlear electrode with no abnormal morphology and orientation. Conclusion DR-IAC is a cheap and ef-fective way for monitoring the location and morphology of electrode. It should be the general examination of cochlear implantation post-operatively. CT can provide exact information of ectopic cochlear implantation and malformation of in-ner ear and middle ear. Both DR-IAC and CT have important value in the effect of cochlear implantation assessment and rehabilitation.%目的 探讨DR内听道像及多层螺旋CT三维重建对人工耳蜗植入术后的效果评估.方法 回顾性分析2012年1月至2015年6月我院46例已行人工耳蜗植入术后的影像检查及相关的声学检测资料.所有患者均行DR内听道像及耳镜检查.结果 43例DR内听道像显示工作电极全部植入且沿耳蜗螺旋自然弯曲,无滑脱、扭曲,术中、术后的声学检测正常;2例DR內听道像显示工作电极未植入完全,术中检测声阻抗正常,术后恰当刺激神经反应遥测可引出;1例患者内耳先天发育畸形Mickel型,其多层螺旋CT三维重建显示耳蜗内电极位置过深,部分自鼓阶滑脱,部分在底圈与中间圈移行处扭曲,且电极不工作,声学检测不能引出,需行再植入术,其他5例CT显示耳蜗内电极连续,形态、走行无异常.结论 DR内听道像廉价、直观监测蜗内电极位置、形态,应作为人工耳蜗植入术后的常规检查;CT可以提供确切的异位信息及内耳、中耳畸形的情况,两者对人工耳蜗植入术后的效果评估和康复训练有重要的价值.
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