Department of Otorhinolaryngology Head and Neck Surgery, Eye and ENT Hospital of Fudan University, 83 Fenyang Rd, Shanghai, 200031, China.
Eur Arch Otorhinolaryngol. 2014 Jun;271(6):1451-5. doi: 10.1007/s00405-013-2480-6. Epub 2013 Jun 21.
In order to investigate the location of the mastoid portion of the facial nerve in patients with congenital aural atresia and to assess its effect on the round window middle ear implant (MEI) transducer implantation approach, 70 patients with unilateral congenital aural atresia were examined by computer tomography (CT). The patients were divided into two groups based on their ages: 44 patients in Group A (2-12 years) and 26 patients in Group B (13-29 years). CT scans were reviewed for each patient. Based on the CT findings, the mastoid portion of the facial nerve's spatial configuration with respect to the oval and round windows was qualitatively recorded. Additionally, the exact location of the facial nerve was measured quantitatively. The results suggested that of the 70 deformed ears, 57 had facial nerves located at the round window, six at the oval window, and seven at the normal site. Of the 70 normal opposite ears, 63 had facial nerves located at the normal site, and the other seven had facial nerves located at the round window. Based on the quantitative measurements, the mastoid portion of the facial nerve was more anteriorly positioned in the deformed ears: 3.44-6.09 mm more anteriorly located in Group A and 4.35-7.41 mm more anteriorly located in Group B. In conclusion, in patients with congenital aural atresia, the dislocation of the facial nerve could have significant effects on the surgical approach to round window MEI transducer implantation.
为了研究先天性耳畸形患者面神经乳突段的位置，并评估其对面窗式中耳植入（MEI）换能器植入方法的影响，对 70 例单侧先天性耳畸形患者进行了计算机断层扫描（CT）检查。根据年龄将患者分为两组：A 组 44 例（2-12 岁），B 组 26 例（13-29 岁）。对每位患者的 CT 扫描进行了回顾。根据 CT 结果，定性记录面神经乳突段相对于卵圆窗和圆窗的空间结构。此外，对面神经的确切位置进行了定量测量。结果表明，在 70 个畸形耳中，57 个面神经位于圆窗，6 个位于卵圆窗，7 个位于正常位置。在 70 个正常对侧耳中，63 个面神经位于正常位置，另外 7 个位于圆窗。根据定量测量结果，面神经乳突段在畸形耳中位置更靠前：A 组更靠前 3.44-6.09mm，B 组更靠前 4.35-7.41mm。总之，在先天性耳畸形患者中，面神经的脱位对面窗式 MEI 换能器植入的手术入路有显著影响。
