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目的:探讨一种新的通过外耳道后上径路(SMA)植入电极的人工耳蜗植入方法。方法:对8例(16侧)尸头模拟SMA的人工耳蜗植入法,对该手术径路进行了相关解剖数据的测量,并且在术前、术后进行HRCT扫描及重建加以对照和证实。结果:SMA的人工耳蜗植入术电极通过颞骨区隧道、外耳道骨槽,从鼓索神经下方、锤骨柄和砧骨长脚之间植入耳蜗底周,隧道与颞线向前延伸假想水平线平均角度成人为(28.0±1.3)°儿童为29.0°±1.7°,电极植入耳蜗入口的定位为成人距圆窗龛(1.31±0.13)mm,儿童为(1.19±0.12)mm。结论:SMA的人工耳蜗植入术是一种简便,安全的方法,可以达到人工耳蜗植入术的预期要求,并且距离面神经和鼓索神经足够的安全距离,临床上应根据患者的年龄、术前情况、相关病史选择不同的手术入路。
Objective: To investigate a new cochlear implant method using an external auditory canal upper (SMA) electrode. Methods: Cochlear implants were simulated in 8 cases (16 sides) of cadaveric head. SMA was used to measure the anatomical data of the surgical approach. HRCT scanning and reconstructions were performed before and after surgery. RESULTS: The cochlear implant electrode of SMA implanted the basal cochlear space between the tunnel of the temporal canal and the canal of the external auditory canal through the temporal bone tunnel. The imaginary horizontal line averaged forward between the tunnel and the temporal line The angle of entrance to the cochlear implant was (1.31 ± 0.13) mm for adults and (1.19 ± 0.12) mm for children, respectively. The height of the entrance to the cochlear implant was (28.0 ± 1.3) ° and 29.0 ° ± 1.7 ° respectively. Conclusion: SMA cochlear implantation is a simple and safe method that can meet the expected requirements of cochlear implant surgery, and the distance from the facial nerve and the chorda nerve adequate safety distance should be clinically based on the patient’s age, surgery Before the situation, choose a different surgical history of the approach.