Equivalent Model of Cochlear Lymph Fluidin Middle Ear Finite Element Analysis
ZHU Yi zhou1; CHEN Li fen1; ZHANG Tian yu2; DAI Pei dong2; XIE Youz hou2; YANG Lin1; WANG Ke qiang3; WANG Zheng min2
(1.Department of mechanics and engineering science, Fudan University,Shanghai 200433,China;2.Eye and ENT hospital of Fudan University,Shanghai 200031, China;3.Zhongshan hospital of Fudan University,Shanghai 200032, China)
Abstract: A three-dimensional geometrical model of middle ear including tympanic membrane, ossicles, tendoms and muscles was built up here using the serial tissue sections method. The lymph fluid of cochlear could be equivalent to a mass-stiffness-damping model, the physical parameters of the equivalent model were determined according to the published physical properties. Harmonic response analysis was made for the middle ear finite element model. The displacements of the eardrum umbo and the stapes footplate were compared with the experimental data taken from the literature. The reliability of the FE model was confirmed with the comparison. A further study by changing the physical parameters of the equivalent model was made then to observe the effect of the lymph fluid on the sound transmission.