The facial nerve canal in patients with Bell's palsy: an investigation by high-resolution computed tomography with multiplanar reconstruction
The facial nerve canal in patients with Bell's palsy: an investigation by high-resolution computed tomography with multiplanar reconstruction
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DOI：
10.1007/s00405-012-2253-7
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发表时间：
2013-07-01
影响因子：
2.6
通讯作者：
Nishizaki, Kazunori
中科院分区：
文献类型：
--
作者：
Murai, Aya;Kariya, Shin;Nishizaki, Kazunori
面神经水肿是贝尔麻痹患者的一个重要发现。炎症可能引起面神经水肿，面神经管内可能出现面神经的机械压迫和缺血性改变。一些研究报告了使用传统计算机断层扫描或人体颞骨切片来测量面神经管的尺寸。然而，面神经管的横截面积尚未完全了解。因此，通过计算机断层扫描多平面重建测量单侧贝尔麻痹患者的面神经管横截面积。招募了 16 名单侧贝尔麻痹患者。对颞骨进行计算机断层扫描，并通过多平面重建技术重建面神经管的垂直图像。测量患侧和健侧面神经管迷路段、水平段和乳突段的横截面积。在迷路节段和水平节段中，患侧面神经管的平均横截面积均明显小于健侧。乳突段面神经管横截面积患侧与健侧无显着差异。迷路段是面神经管中最狭窄的段。这些发现表明面神经很脆弱，尤其是面神经管的迷路段，狭窄的面神经管可能是贝尔麻痹的危险因素之一。
Facial nerve edema is an important finding in Bell's palsy patients. Inflammation may cause facial nerve edema, and mechanical compression and ischemic change of the facial nerve may occur in the facial nerve canal. A few studies have reported the dimensions of the facial nerve canal using conventional computed tomography or human temporal bone sections. However, the cross-sectional area of the facial nerve canal has not been fully understood. Therefore, the cross-sectional area of the facial nerve canal was measured in patients with unilateral Bell's palsy by computer tomography with multiplanar reconstruction. Sixteen patients with unilateral Bell's palsy were enrolled. Computed tomography of the temporal bone was performed, and perpendicular images to the facial nerve canal were reconstructed by the multiplanar reconstruction technique. The cross-sectional area of the facial nerve canal on the affected and unaffected sides was measured at the labyrinthine segment, the horizontal segment, and the mastoid segment. Both in the labyrinthine and horizontal segments, the mean cross-sectional area of the facial nerve canal was significantly smaller on the affected side than on the unaffected side. There was no significant difference between the affected and unaffected sides in the cross-sectional area of the facial nerve canal in the mastoid segment. The labyrinthine segment was the narrowest segment in the facial nerve canal. These findings suggest that the facial nerve is vulnerable, especially in the labyrinthine segment of the facial nerve canal, and a narrow facial nerve canal may be one of the risk factors for Bell's palsy.