Liu J M, Zhu D D, Jin G H, Zhu X W, Li L, Liu G W, Cheng K L, Li Y Q
Department of Otorhinolaryngology Head and Neck Surgery, China Japan Union Hospital of Jilin University, Changchun 130021, China.
Department of Anatomy, College of Basic Medicine, Bethune Medicine Institute, Jilin University, Changchun 130021.
Zhonghua Er Bi Yan Hou Tou Jing Wai Ke Za Zhi. 2017 Sep 7;52(9):698-701. doi: 10.3760/cma.j.issn.1673-0860.2017.09.012.
This study aimed to measure the morphological parameters of the internal acoustic meatus(IAM) and its adjacent structures using temporal-bone thin-section CT(computed tomography). CT images were obtained from 50 Chinese adult patients (25 males and 25 females, 100 sides) which had no visible lesion in the petrous part of the temporal bone and inner ear, the morphological parameters of all inner ear parts were sectionally measured on the specified plane using SPSS 22.0 software for statistical analysis. The integral morphological characteristics of the IAM were observed. These results revealed that anterior-posterior diameter of the internal acoustic poer(IAP)(CD) was (6.93±1.85)mm, the superior-inferior diameter of the IAP(EF) was (4.40±0.86)mm, the length of the IAM(AB) was (9.30±1.60)mm, the superior-inferior diameter of the IAM(the intersection of inner 1/3 section and middle 1/3 section) was (4.13±0.83)mm, the superior-inferior diameter of the IAM(the intersection of middle 1/3 section and outer 1/3 section) was (4.61±1.02)mm, the anterior-posterior diameter of the IAM(the intersection of inner 1/3 section and middle 1/3 section) was (6.62±1.92)mm, the anterior-posterior diameter of the IAM(the intersection of middle 1/3 section and outer 1/3 section) was (6.28±1.65)mm, the depth of transverse crest (superior wall) was (3.10±0.75)mm, the depth of transverse crest (interior wall)the was (1.46±0.59)mm, the distance from transverse crest vertex A to the superior wall of the IAM was (2.05±0.42)mm, the distance from transverse crest vertex A to the interior wall of the IAM was (2.93±0.41)mm, the thickness of the superior bone wall of the IAM (the intersection of inner 1/3 section and middle 1/3 section) was (4.45±1.34)mm, the thickness of the superior bone wall of the IAM (the intersection of middle 1/3 section and outer 1/3 section) was (4.32±1.12)mm, the thickness of the superior bone wall of the IAM (the intersection of outer 1/3 section and transverse crest vertex) was (4.37±1.28)mm, and the appearance ratio of the cells in the whole IAM superior wall was 32%.The whole IAM assumed the shape of short cylinder, inclining about 1 cm outward, with the upper-lower diameter and anterior-posterior diameter about 5 mm. It is necessary for carrying out preoperative the temporal-bone thin-section CT to obtain the morphological parameters of the IAM, determine its basic morphology, and provide references to avoid damaging the other important structures during IAM surgeries.
本研究旨在利用颞骨薄层CT（计算机断层扫描）测量内耳道（IAM）及其相邻结构的形态学参数。从50例中国成年患者（25例男性和25例女性，共100侧）获取CT图像，这些患者颞骨岩部和内耳无可见病变，使用SPSS 22.0软件在指定平面上对所有内耳部分的形态学参数进行分段测量并进行统计分析。观察IAM的整体形态特征。结果显示，内耳道孔（IAP）的前后径（CD）为（6.93±1.85）mm，IAP的上下径（EF）为（4.40±0.86）mm，IAM的长度（AB）为（9.30±1.60）mm，IAM（内1/3段与中1/3段交界处）的上下径为（4.13±0.83）mm，IAM（中1/3段与外1/3段交界处）的上下径为（4.61±1.02）mm，IAM（内1/3段与中1/3段交界处）的前后径为（6.62±1.92）mm，IAM（中1/3段与外1/3段交界处）的前后径为（6.28±1.65）mm，横嵴（上壁）深度为（3.10±0.75）mm，横嵴（内壁）深度为（1.46±0.59）mm，横嵴顶点A到IAM上壁的距离为（2.05±0.42）mm，横嵴顶点A到IAM内壁的距离为（2.93±0.41）mm，IAM上壁（内1/3段与中1/3段交界处）的骨壁厚度为（4.45±1.34）mm，IAM上壁（中1/3段与外1/3段交界处）的骨壁厚度为（4.32±1.12）mm，IAM上壁（外1/3段与横嵴顶点交界处）的骨壁厚度为（4.37±1.28）mm，整个IAM上壁细胞的出现率为32%。整个IAM呈短圆柱形，向外倾斜约1 cm，上下径和前后径约为5 mm。术前进行颞骨薄层CT以获取IAM的形态学参数、确定其基本形态并为避免在IAM手术中损伤其他重要结构提供参考是必要的。
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