Takahashi Masahiro, Arai Yasuhiro, Sakuma Naoko, Yabuki Kenichiro, Sano Daisuke, Nishimura Goshi, Oridate Nobuhiko, Usami Shin-Ichi
a Department of Otorhinolaryngology, Head and Neck Surgery , Yokohama City University School of Medicine , Yokohama , Japan.
b Department of Otorhinolaryngology , Shinshu University School of Medicine , Nagano , Japan.
Acta Otolaryngol. 2018 Apr;138(4):345-350. doi: 10.1080/00016489.2017.1393840. Epub 2017 Nov 17.
The preservation of residual hearing after conventional cochlear implantation (CI) is frequently observed when atraumatic soft surgery is adopted. The purpose of this study was to elucidate the predictive factors for residual hearing preservation after atraumatic CI.
This study included 46 patients who underwent CI based on an atraumatic technique using a standard-length flexible electrode implant through a round window approach.
Cochlear volume was measured using magnetic resonance imaging (MRI). Cochlear duct length (CDL) was taken as the length of the scala media measured using computed tomography (CT). The association between residual hearing preservation and cochlear volume/CDL was then examined.
Cochlear volume and CDL were significantly larger in patients with complete hearing preservation than in those with hearing loss. Multivariate logistic regression analysis revealed that cochlear volume was a significant predictive factor for residual hearing preservation.
Residual hearing preservation after conventional CI was observed in patients with a larger cochlear volume and longer CDL. Cochlear volume could be a predictive factor for residual hearing preservation after conventional CI.
采用无创性软手术时，常可观察到传统人工耳蜗植入（CI）后残余听力得以保留。本研究旨在阐明无创性CI后残余听力保留的预测因素。
本研究纳入了46例患者，这些患者通过圆窗入路，采用标准长度的柔性电极植入物，基于无创技术接受了CI。
使用磁共振成像（MRI）测量耳蜗体积。耳蜗管长度（CDL）采用计算机断层扫描（CT）测量，即中阶的长度。然后检查残余听力保留与耳蜗体积/CDL之间的关联。
完全保留听力的患者耳蜗体积和CDL显著大于听力丧失的患者。多因素逻辑回归分析显示，耳蜗体积是残余听力保留的显著预测因素。
耳蜗体积较大且CDL较长的患者在传统CI后可观察到残余听力保留。耳蜗体积可能是传统CI后残余听力保留的预测因素。
