Kono Tatsuo
Department of Radiology, Dokkyo Medical University School of Medicine, 880 Kitakobayashi, Mibu, Shimotsuga, Tochigi 321-0293, Japan.
Radiat Med. 2008 Apr;26(3):115-9. doi: 10.1007/s11604-007-0204-9.
The aim of this study was to evaluate the diameters of the various bony canals of the inner ear in patients with sensorineural hearing loss (SNHL) and establish criteria for detecting hypoplasia of the bony canal of the cochlear nerve.
Measurements obtained in 118 patients without inner ear malformations among 160 patients with unilateral SNHL were analyzed. The diameters of the internal auditory canal and the bony canals of the cochlear, vestibular, and facial nerves were measured on transverse or coronal computed tomographic images. Mean values (+/- SD) were compared between the affected and unaffected ears, and statistical analysis was done.
The diameter of the bony canal of the cochlear nerve was significantly smaller in affected ears than in unaffected ears (P < 0.01). The affected ears could be divided into groups with (72 ears) and without (46 ears) bony canal stenosis.
Most (60%) of the patients with unilateral SNHL showed a significant difference in the diameters of the bony canals of the cochlear nerve between the affected and unaffected sides; moreover, the mean value was significantly smaller in affected ears. The diameter of < 1.7 mm on transverse images or < 1.8 mm on coronal images suggests hypoplasia.
本研究旨在评估感音神经性听力损失（SNHL）患者内耳各骨管的直径，并建立检测蜗神经骨管发育不全的标准。
分析了160例单侧SNHL患者中118例无内耳畸形患者的测量数据。在内耳横断位或冠状位计算机断层扫描图像上测量内耳道以及蜗神经、前庭神经和面神经骨管的直径。比较患侧耳与未患侧耳的平均值（±标准差），并进行统计学分析。
患侧耳蜗神经骨管直径明显小于未患侧耳（P < 0.01）。患侧耳可分为有（72耳）和无（46耳）骨管狭窄两组。
大多数（60%）单侧SNHL患者患侧与未患侧蜗神经骨管直径存在显著差异；此外，患侧耳的平均值明显较小。横断位图像上直径<1.7 mm或冠状位图像上直径<1.8 mm提示发育不全。
