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目的探讨基于显微镜的神经导航系统在乙状窦后入路中打开内听道中的作用,为经乙状窦后入路中安全打开内听道提供解剖研究。方法对8具16侧成人汉族尸头标本在神经导航指引下完成乙状窦后入路中到达内听道,观测内听道的解剖及其与重要结构的关系。结果均成功导航,到达内听道的导航平均定位误差是(0.71±0.20)mm,到达后半规管的解剖定位误差是(0.68±0.42)mm。内耳门后下缘到乙状窦后缘中点的距离左侧为(32.15±1.76)mm,右侧为(33.34 ±1.57)mm,内耳门后下缘到后半规管后缘中点的距离左侧为(12.51±2.15)mm,右侧为(13.26±2.44)mm。结论神经导航辅助下打开内听道有肯定的价值;熟悉内耳门及周围结构的显微解剖有助于手术中保护重要结构,
Objective To investigate the effect of microsurgical neural navigation system in opening the internal auditory canal in sigmoid sinus posterior approach and to provide anatomical study of safely opening the internal auditory canal in the sigmoid sinus posterior approach. Methods Sixteen adult Han cadaver heads of 8 adults under the guidance of neuro-navigation were performed to reach the internal auditory canal after sigmoid sinus approach. The anatomy of the internal auditory canal and its relationship with important structures were observed. The results were successfully navigated, and the average navigation error to the internal auditory canal was (0.71 ± 0.20) mm. The anatomic positioning error of the posterior semicircular canal reached (0.68 ± 0.42) mm. The distance from the lower edge of the inner ear to the midpoint of the posterior edge of the sigmoid sinus was (32.15 ± 1.76) mm on the right and (33.34 ± 1.57) mm on the right. The distance from the lower edge of the inner ear to the midpoint of the posterior edge of the posterior semicircular canal (12.51 ± 2.15) mm on the side and (13.26 ± 2.44) mm on the right. Conclusion Nerve navigation aids the opening of the internal auditory canal has a certain value; familiar with the inner ear door and the surrounding structure of the micro-anatomical help the surgery to protect the important structures,