【摘要】 目的探讨内镜下迷路后入路小脑桥脑角区解剖标志与定位方法。方法在10例(20侧)成人头颅标本上模拟内镜下迷路后入路手术,观察内听道与桥脑小脑角区各组颅神经之间的关系,并测量相关数据。结果以外半规管水平上的后半规管后缘为标志点:后半规管后缘距内耳门后缘(15.89±1.61)mm,距三叉神经下缘(27.43±3.25)mm,距舌咽神经上缘(19.39±2.57)mm;后半规管后缘-内耳门后缘连线与后半规管后缘-舌咽神经上缘连线的夹角为16.78°±2.06°,后半规管后缘-内耳门后缘连线与后半规管后缘-三叉神经下缘连线的夹角为16.25°±2.88°。结论内镜下迷路后入路小脑桥脑角区手术具有损伤小,暴露清晰,多角度观察等优点,对于显微外科手术是一种有效的辅助手段。更多还原

【Abstract】 Objective To study anatomic land marksers and orientation methodology in the cerebellopontine angle through retrolabyrinthine approach under an endoscope. Methods In 10 cadaveric specimens (20 sides),endoscopic surgery via retrolabyrinthine approach was simulated. The anatomic features of the cerebellopontine angle were examined and measured. Results Measuring from the posterior margin of posterior semicircular canal on plane of lateral semicircular canal,the distance was 15.89 ± 1.61 mm to the posterior margin of internal acoustic meatus,27.43 ± 3.25 mm to the inferior margin of trigeminal nerve and 19.39 ± 2.57 mm to the upper margin of glossopharyngeal nerve. The angle between the line connecting the posterior margin of posterior semicircular canal with the posterior margin of internal acoustic meatus and the line connecting the posterior margin of posterior semicircular canal with the upper margin of glossopharyngeal nerve,was 16.78 ± 2.06°. The angle between the line connecting the posterior margin of posterior semicircular canal with the posterior margin of internal acoustic meatus and the line connecting the inferior margin of trigeminal nerve was 16.25 ± 2.88°. Conclusion Endoscopic surgery in the cerebellopontine angle via a retrolabyrinthine approach has advantages of minimal invasiveness,satisfactory exposure and multi -angle visualization and provides an efficient utility in microsurgery.更多还原