人耳鼓膜穿孔对中耳传声影响的数值模拟  

Numerical analysis for sound transmission of middle ear with perforations

作　　者：孙秀珍[1,2] 李生[2] 刘迎曦[2,1] 

机构地区：[1]大连医科大学第二临床附属医院耳鼻咽喉科,大连116025 [2]大连理工大学工业装备结构分析国家重点实验室,大连116024

出　　处：《计算力学学报》2010年第6期1102-1106,共5页Chinese Journal of Computational Mechanics

基　　金：国家自然科学基金(10872043,10902022,11032008)资助项目

摘　　要：鼓膜穿孔是一种非常普遍的中耳疾病,其对人中耳传声的影响并没有得到很全面的研究。本文根据健康志愿者(右耳)完整的CT数据,建立了包括外耳道、鼓膜、听骨链、中耳韧带/肌肉、中耳腔以及内耳液体在内的有限元模型,真实完整地再现了其复杂结构及边界约束。利用模型进行了外耳、中耳和内耳的声固耦合分析,研究了鼓膜穿孔位置和穿孔大小对中耳传声的影响。研究结果表明了本文建立的三维有限元模型对研究鼓膜穿孔对中耳系统传声的影响是可行的。Tympanic membrane perforations are common sequelae of middle ear disease. Sound transmission through middle ears with tympanic membrane perforations is not well understood. In this study, a three-dimensional finite element model of human ear with perforations is proposed that includes the ear canal, tympanic membrane, ossicular bones, middle ear suspensory ligaments/muscles, middle ear cavity, and inner ear fluid. The acoustic-structural coupling effect of the canal, tympanic membrane and the middle ear cavity is conducted and employed to predict the effects of perforation location and perforation size on sound transmission of the middle ear. The results show that the finite element model with perforations may be useful to predict the conductive hearing loss resulting from a tympanic membrane perforation.

关 键 词：有限元模型 耳力学 声固耦合 鼓膜穿孔 

分 类 号：R318.01[医药卫生—生物医学工程] O242.21[医药卫生—基础医学]