Dew L A, Shelton C, Harnsberger H R, Thompson B G
Division of Otolaryngology, University of Utah, Salt Lake City, USA.
Laryngoscope. 1997 Jul;107(7):967-76. doi: 10.1097/00005537-199707000-00026.
When exposing the horizontal petrous carotid artery in preparation for intrapetrous carotid bypass, the surgeon has no definite landmarks to localize the perimeter of the cochlea. The results of this study provide a practical, consistent, and safe method to maximize carotid artery exposure while minimizing cochlear injury. We measured the carotid-cochlea distance (mean, 4.3 mm) and the carotid-cochlear angle (mean, 10.8 degrees) in 33 temporal bones in which the extended middle fossa approach had been performed. We correlated this distance to the width of a Sheehy weapon knife, which can be easily measured intraoperatively. Twenty-five temporal bones were imaged prior to surgical exposure using a new computed tomography (CT) protocol that can be used for preoperative assessment of the carotid-cochlear anatomy. The carotid-cochlea distance and carotid-cochlear angle measured on CT are compared with postsurgical measurements.
在为岩骨内颈动脉搭桥术做准备而暴露水平段岩骨颈动脉时，外科医生没有明确的标志来定位耳蜗的边界。本研究结果提供了一种实用、一致且安全的方法，可在最大程度暴露颈动脉的同时，将耳蜗损伤降至最低。我们在33块已行扩大中颅窝入路的颞骨中测量了颈动脉-耳蜗距离（平均4.3毫米）和颈动脉-耳蜗角度（平均10.8度）。我们将此距离与Sheehy手术刀的宽度相关联，该宽度在术中易于测量。使用一种可用于术前评估颈动脉-耳蜗解剖结构的新计算机断层扫描（CT）方案，对25块颞骨在手术暴露前进行成像。将CT上测量的颈动脉-耳蜗距离和颈动脉-耳蜗角度与术后测量结果进行比较。
