人工耳蜗植入术后X线投照位置的探讨

目的:确定耳蜗在颅骨的空间位置,设计最佳耳蜗X线摄片投照角度,用于评价电极位置。方法:测量26例耳蜗植入候选患儿术前CT和32例正常成人中内耳CT片上,耳蜗底周与正中矢状线的夹角;并根据测量的X线投射角度拍摄耳蜗位X线平片。结果:蜗轴中线与正中矢状线的角度为40°到68°,平均52.66°;其中儿童组的平均值为52.52°(s=7.07),成人组的平均值为52.80°(s=5.78),两者间差异无显著性意义(P>0.05)。结论:按所测的X线投射角度拍摄的耳蜗平片,能清晰完整显示电极系列的整体和所有的单个电极,确定电极的插入深度和准确的位置,为频率的匹配定位、语言处理方案的优化提供帮助。

Postoperative radiography for cochlear implantation

Objective:To define a spatial position of the cochlea in the skull base and to design an appropriate method of skull radiography for demonstration of the multichannel intracochlear electrode array. Method: Measure the angle between the basal turn of the cochlear and the median sagittal line on the axial plane CT from 26 children candidates of cochlear implant and 32 adults. Result:The angle between the axis of the cochlear and the median sagittal line varied from 40 to 68. the average is 52. 66. The average angle in children is 52. 52 ( s =7.07) and 52. 80( s =5. 78) in the adults. The difference between the two group has no significance ( P >0. 05). Conclusion : The plain radiography cochlear view gives a clear image of the whole intracochlear electrode array and each individual electrode, it is useful for evaluating the depth and exact position of the electrodes, managing frequency mapping and optimizing speech processing strategies- it can be widely used in cochlear implant clinics and research.