背景:费希时空窝方法(费希方法),1970年首次提出,通常用于内听道(IAC)手术,其方法是通过中颅窝前进。这项研究旨在解决相对于上半规管(SSC)识别和定位弓形隆起时遇到的技术困难。
方法:选择颞骨岩部无占位病变的40名男性和40名女性(18-57岁)进行研究。总的来说,从颞骨两侧获得160个样本。使用计算机断层扫描扫描了这160个样本中的颞骨,并建立了三维坐标系来测量弧形隆起附近结构的三维坐标值,SSC,IAC。
结果:结果表明,弓形隆起的形状是高度可变的。约23.12%的样品无明显弓形隆起,这阻止了使用Fisch\的方法来本地化SSC。在37个样品中很难鉴定弓形隆起。
结论:分析样本显示,SSC位于颞骨岩部上边缘中点的扇形环中。弓形隆起与SSC没有直接对应,因为前者在85.83%的样本中位于后者的后外侧。SSC和IAC之间的角度范围从0°到60°,正如Fisch之前报道的那样。然而,在我们的研究中,角度通常在10-30°之间。
BACKGROUND: The Fisch infra-temporal fossa approach (Fisch\'s method), first proposed in 1970, is commonly used during internal auditory canal (IAC) surgery with an approach that advances through the middle cranial fossa. This study was designed to address the technical difficulties encountered in recognizing and localizing the arcuate eminence with respect to the superior semicircular canal (SSC).
METHODS: Forty men and 40 women (18-57 years of age) without space-occupying lesions in the petrous part of the temporal bone were selected for the study. In total, 160 samples were obtained from both sides of the temporal bone. The temporal bone in these 160 samples was scanned using computed tomography, and a three-dimensional coordinate system was established to measure the three-dimensional coordinate values of structures adjacent to the arcuate eminence, the SSC, and the IAC.
RESULTS: The results showed that the shape of the arcuate eminence is highly variable. Approximately 23.12% of samples had no obvious arcuate eminence, which prevented the use of Fisch\'s method to localize the SSC. The arcuate eminence was difficult to identify in 37 samples.
CONCLUSIONS: Analysis samples showed that the SSC was located in a fan ring centered at the midpoint of the upper edge of the petrous portion of the temporal bone. The arcuate eminence did not correspond directly with the SSC, as the former was located posterolateral to the latter in 85.83% of samples. The angle between the SSC and the IAC ranged from 0° to 60° degrees, as reported previously by Fisch. However, the angle typically ranged from 10-30° in our study.