Wang Xuelin
School of Mechanical Science and Engineering, Huazhong University of Science & Technology, Wuhan 430072, China.
Sheng Wu Yi Xue Gong Cheng Xue Za Zhi. 2012 Dec;29(6):1109-13.
Stimulation of the round window (RW) for coupling an implantable hearing system to the cochlea has gained increasing clinical importance. To compare the vibration transfer to the cochlear fluids and partition in response to normal acoustic stimulation and to mechanical stimulation of the RW, we carried out an acoustic-structure coupled finite element analysis using a recently developed finite element (FE) model in our laboratory, which consisted of external ear canal, middle ear and cochlea. Intracochlear pressures were derived during normal forward sound stimulation as well as reverse RW stimulation. A model was utilized to calculate the force required of an actuator at the RW to produce a differential intracochlear pressure that is equivalent to a stimulus produced in normal ear by a given external ear-canal pressure. The current results provided further information to support the optimization of the actuators and adapt existing prostheses for RW stimulation in order to insure sufficient acoustic output.
刺激圆窗以将可植入听力系统与耳蜗耦合，在临床上的重要性日益增加。为了比较正常声刺激和圆窗机械刺激下振动向耳蜗内淋巴液的传递以及分隔情况，我们使用实验室最近开发的有限元（FE）模型进行了声-结构耦合有限元分析，该模型包括外耳道、中耳和耳蜗。在正常正向声音刺激以及反向圆窗刺激过程中得出了耳蜗内压力。利用一个模型来计算圆窗处致动器产生与给定外耳道压力在正常耳朵中产生的刺激等效的耳蜗内压差所需的力。当前结果为支持致动器的优化以及使现有的假体适应圆窗刺激提供了更多信息，以确保有足够的声学输出。
