中耳结构数值模拟及传导振动分析  

Numerical Simulation and Transmitting Vibration Analysis for Middle-Ear Structure

作　　者：姚文娟[1] 李武[1] 付黎杰[1] 黄新生[2] 

机构地区：[1]上海大学土木系,上海大学应用数学和力学研究所,上海200072 [2]复旦大学附属中山医院耳鼻喉科,上海200032

出　　处：《系统仿真学报》2009年第3期651-654,共4页Journal of System Simulation

摘　　要：传导性耳聋多由鼓膜或听骨链病变所致。缘于中耳解剖结构和传音机制的复杂,目前通过临床治疗未能使患者获得理想的听力。基于临床CT扫描结果建立中耳有限元模型,并应用动力学的传导振动原理,对中耳结构进行数值计算分析,得到鼓膜振幅分布及听骨链结构的应力场。分析并得到结论:鼓膜与锤骨接触的边界区域是鼓膜最容易穿孔部位;砧镫骨关节的邻近区域是听骨链结构最容易破坏部位。该结论与临床统计的中耳易病变位置相吻合。此研究从力学机理解释了中耳的病变机理,可为耳临床医学提供新的研究视角。Transmission deafness is mainly caused by the pathological changes of eardrum or ossicular chain. Currently, audition transmission structure rebuilt by clinic-cure cannot reach the physiological state and the sufferer cannot gain the ideal audition. Based on clinic graphic results of CT, a three dimensional finite element model of human middle ear was established, and numerical analysis of dynamic property of middle-ear structure was carried out by adopting the principle of dynamic transmission and vibration. The swings distribution of the eardrum and stress field of the ossicular chain were obtained. The analytic conclusion, the contact boundary area between the eardrum and malleus is the most likely part to get perforation; the vicinity area of incus-stapes joing is the weakest part to the ossicular chain. This conclusion is in consistent with the clinic statistics of the pathological position of the middle ear. This research has explained the mechanism of pathological change fi＇om the angle of mechanics and will land new research insight into clinical otologic science.

关 键 词：中耳 数值模拟 传导振动 力学机理 病变机理 

分 类 号：TP391.9[自动化与计算机技术—计算机应用技术]