枕下-乙状窦后-内耳道入路显微解剖学研究

Microsurgical Anatomy of Suboccipital-retrosigmoid-IAC Approach

应用 10 %甲醛充分固定的汉族成人尸头标本 (保留C2 以上 ) 10例 2 0侧 ;漂白干颅骨 10例 2 0侧。模拟手术入路逐层解剖 ,并对解剖结构进行精确测量和拍照。对桥脑小脑角和内耳道的骨性结构、神经及血管进行解剖测量 ,明确了听神经瘤手术时面神经、位听神经周围结构的位置关系并进行量化。通过对内耳道及枕下 乙状窦后 内耳道入路途径结构的测量和拍照 ,为临床手术提供解剖学参数。结果提示 :熟悉内耳道周围解剖结构的毗邻关系 ,有助于在提高肿瘤全切率的同时保护脑的重要结构 ,降低死亡率。

Microsurgical anatomy of internal auditory canal (IAC) and cerebellopontine angl e that were related to suboccipital retrosigmoid approach were studied to put fo rward anatomic parameters for the operation of acoustic neuromas. Ten cadaveric head s were dissected using 5 to 25× magnification and ten dry skulls provided 20 te m poral bone for measurment of the osseous relationships in the region. The anatom ic distances were measured and the anatomic structures were photographed wi th microphoto camera. The anatomic relationship and data of structures in cerebe llopontine angle and IAC that was related to acoustic neuromas were obtained. Fa miliarity with the microanatomical relationship of the structures around IAC may be helpful to improve the surgical outcome of acoustic neuromas.