Department of Radiology, Beijing Friendship Hospital, Capital Medical University, 95 Yong An Road, Western District, Beijing 100050, China.
Department of Radiology, Beijing Friendship Hospital, Capital Medical University, 95 Yong An Road, Western District, Beijing 100050, China.
Auris Nasus Larynx. 2023 Oct;50(5):749-756. doi: 10.1016/j.anl.2023.02.003. Epub 2023 Mar 7.
The relationship between the stapedius muscle and the vertical part of the facial nerve is important for surgery. The study aims to understand the spatial relationship between the stapedius muscle and the vertical part of the facial nerve in ultra-high-resolution computed tomography (U-HRCT) images.
A total of 105 ears from the heads of 54 human cadavers were analyzed using U-HRCT. The location and direction of the stapedius muscle were evaluated with the facial nerve as the reference. The integrity of the bony septum between the two structures and the distance between the transverse sections were examined. Paired Student's t-test and the nonparametric Wilcoxon test were applied.
The lower end of the stapedius muscle emerged at the upper (45 ears), middle (40 ears), or lower (20 ears) level of the facial nerve and was positioned medial (32 ears), medial posterior (61 ears), posterior (11 ears), or lateral posterior (1 ear) to the facial nerve. The bony septum was not continuous in 99 ears. The distance between the midpoints of the two structures was 1.75 mm (IQR=1.55-2.16 mm).
The spatial relationship between the stapedius muscle and the facial nerve was varied. They were close to each other and in most cases the bony septum was not intact. Preoperative familiarity with the relationship between the two structures is helpful for avoiding unwanted injury to the facial nerve in surgery.
镫骨肌和面神经垂直部之间的关系对面神经手术很重要。本研究旨在通过超高分辨率 CT（U-HRCT）图像了解镫骨肌和面神经垂直部之间的空间关系。
使用 U-HRCT 分析了 54 具人尸的 105 只耳朵。以面神经为参照，评估镫骨肌的位置和方向。检查了两个结构之间的骨隔是否完整以及横断面之间的距离。采用配对 Student's t 检验和非参数 Wilcoxon 检验。
镫骨肌的下端出现在面神经的上部（45 只耳朵）、中部（40 只耳朵）或下部（20 只耳朵），并位于面神经的内侧（32 只耳朵）、内侧后（61 只耳朵）、后（11 只耳朵）或后外侧（1 只耳朵）。99 只耳朵的骨隔不连续。两个结构中点之间的距离为 1.75mm（IQR=1.55-2.16mm）。
镫骨肌和面神经之间的空间关系多种多样。它们彼此靠近，而且在大多数情况下，骨隔不完整。术前熟悉两个结构之间的关系有助于避免手术中对面神经的不必要损伤。
