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首页> 外文期刊>Otolaryngology--head and neck surgery: official journal of American Academy of Otolaryngology-Head and Neck Surgery >Image-guided localization of the internal auditory canal via the middle cranial fossa approach.
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Image-guided localization of the internal auditory canal via the middle cranial fossa approach.

机译：通过颅中窝入路影像引导内耳道定位。

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摘要

OBJECTIVE: We sought to determine the accuracy of an electromagnetic image guidance surgical navigation system in localizing the midpoint of the internal auditory canal (IAC) and other structures of the temporal bone through the middle cranial fossa approach. MATERIALS AND METHODS: Seven fresh cadaveric whole heads were dissected via a middle cranial fossa approach. High-resolution CT scans were used with an InstaTrak 3500 Plus electromagnetic image guidance system (General Electric, Fairfield, CT). We evaluated the accuracy of identifying several middle cranial fossa landmarks including the midpoint of the IAC; the labyrinthine segment of the facial nerve; and the arcuate eminence, the carotid artery, and foramen spinosum. RESULTS: We were able to identify the middle of the IAC within 2.31 mm (range 0.65-7.52 mm, SD 2.39 mm). The arcuate eminence could be identified within 1.86 mm (range 1.49-2.37 mm, SD 0.36 mm). We noted some interference when the handpiece was within 6 to 8 cm of the microscope. CONCLUSION: Although computer-aided navigational tools are no substitute for thorough knowledge of temporal bone anatomy, we found the InstaTrak system reliable in identifying the midpoint of the IAC to within 2.4 mm through a middle fossa approach.
机译：目的：我们试图确定电磁图像引导手术导航系统通过颅中窝窝入路定位内听道（IAC）和颞骨其他结构的中点的准确性。材料与方法：通过颅中窝入路解剖7例新鲜尸体。高分辨率CT扫描与InstaTrak 3500 Plus电磁图像引导系统（通用电气，费尔菲尔德，CT）一起使用。我们评估了识别包括IAC中点在内的几个颅中窝标志的准确性。面神经的迷宫部分;以及弓状隆起，颈动脉和棘突孔。结果：我们能够在2.31毫米（范围为0.65-7.52毫米，标准差为2.39毫米）内确定IAC的中部。可以在1.86毫米（范围1.49-2.37毫米，标准差0.36毫米）内确定弧形隆起。当手机位于显微镜的6至8厘米以内时，我们注意到了一些干扰。结论：尽管计算机辅助导航工具不能代替对颞骨解剖学的全面了解，但我们发现InstaTrak系统可可靠地通过中窝法将IAC的中点识别在2.4 mm以内。

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