内耳道的解剖学研究及其临床意义

目的:HTSS为内耳道手术定位提供解剖学依据。方法:对400块颞骨的内耳道及其有关结构进行解剖观察和测量。结果:内耳道与岩大神经管裂孔、弓状隆起等结构有较恒定的位置关系。内耳道底投影点至岩大神经管裂孔的距离,在左右两侧分别为8.85mm、7.95mm;至弓状隆起最高点的距离在左侧为7.89mm,右侧为8.50mm,内耳道上壁长左侧为8.41mm,右侧为8.61mm。结论:岩大神经管裂孔、弓状隆起等颞骨岩部结构是定位内耳道的重要标志。内耳道手术应避免损伤上半规管、耳蜗等结构。

Anatomy of Internal Auditory Canal and its Clinical Significance

Objective: To provide the anatomic data for surgical exposure of internal auditory canal. Methods: The internal auditory canal and its neighbor structures were observed and measured on 400 sides of temporal bones. Results: The location of internal auditory canal could be reliably defined by hiatus of canal for greater petrosal nerve, arcuate eminence and other structures. The distance between the projecting point of internal auditory canal and hiatus of canal for greater petrosal nerve was 8.85mm on the left side, 7.95mm on the right side. The distance between the projecting point and arcuate eminence was 7.89mm on the left side,and 8.50mm on the right side. The length of superior base of internal auditory canal was 8.41mm on the left side, and 8. 61mm on the right side. Conclusion: The hiatus of canal for greater petrosal nerve and arcuate eminence are important landmarks to defined internal auditory canal. The anterior semicircular canal and cochlea should be protected when internal auditory canal operation was carried out.