【摘要】 人工耳蜗植入是目前治疗重度到极重度感音性耳聋的有效方法。低频残余听力能够让患者具有较好的言语识别及音乐鉴赏能力,因此在人工耳蜗植入术中保护患者残余听力具有重要意义。本文主要探讨人工耳蜗通过圆窗植入时的不同位置对残余听力可能带来的影响。研究首先基于医学影像利用有限元方法对耳蜗圆窗膜进行建模,将其简化为椭圆形平板结构;随后计算分析了10种人工耳蜗电极在圆窗上的植入位置对圆窗膜刚度变化的影响;进而通过集总参数模型预测了不同圆窗植入位置对残余听力的影响。研究发现,相对圆窗中心沿长轴方向偏移较远的植入方案可以帮助有效保护残余听力。更多还原

【Abstract】 The cochlear implant(CI) is an effective rehabilitation method for severe and profound sensorineural hearing loss. It is important to preserve low-frequency residual hearing during the CI surgery, since this would provide patients with better speech recognition and music appreciation abilities. The aim of this paper is to investigate effects of different insertion positions via the round window(RW) on residual hearing. The finite element method was used to model the round window based on medical images, in which the RW membrane was simplified as an elliptical plane structure. Ten assumptive insertion positions were used for analyzing RW membrane stiffness changes at different frequencies after implantation. A lumped parameter model was then used to predict residual hearing with different insertion positions. The conclusion is that the farther the inserting position away from the RW center along its long axis, the better residual hearing will be preserved.更多还原