Effects of Different Stimulating Positions on the Hearing Compensation Performance of Piezoelectric Middle Ear Implant
Zhang Ying1, Liu Houguang1*, Rao Zhushi2, Huang Xinsheng3, Yang Jianhua1, Yang Shanguo1
1School of Mechatronic Engineering, China University of Mining and Technology, Xuzhou 221116, Jiangsu, China; 2State Key Laboratory of Mechanical System and Vibration, Shanghai Jiaotong University, Shanghai 200240, China; 3Department of Otorhinolaryngology, Zhongshan Hospital Affiliated to Fudan University, Shanghai 200032, China
Abstract：To study the influence of stimulating positions on the hearing compensation performance of piezoelectric middle ear implant (MEI) and ascertain the optimal position for this type ofMEIs, we established a finite element model of human ear, The reliability of the model was verified by comparing the model-predicted results with the experimental data. Based on the model, the displacement stimulation was applied to the umbo, incus body, incus long process and round window. Then, the stimulating positions on the piezoelectric MEI's performance was studied by analyzing the corresponding displacements of the stapes footplate and basilar membrane. Using the displacement of stapes as an evaluation criterion, the round-window stimulation's performance was underestimated at higher frequencies. Compared with the umbo and incus body, basilar membrane displacement at the characteristic place was greater under the incus long process excitation. Basilar membrane displacement at characteristic place was the smallest when under the excitation of incus body. Basilar membrane displacement of the round-window stimulation at the characteristic place was smaller than that at the other positions at lower frequencies, but the exciting effect was the best at middle and high frequencies. In conclusion, the hearing compensation effect of incus long process excitation was the optimum, and the hearing compensation effect of round window excitation was the worst at frequencies below 400 Hz. When the frequency was higher than 1 kHz, the hearing compensation effect of round window excitation was better than that at the other positions. The traditional evaluation criteria that use the stapes footplate displacement would underestimate the performance of the round-window stimulating type MEI.
张莹,刘后广,饶柱石,黄新生,杨建华,杨善国. 不同激振位置对压电式人工中耳听力补偿性能的影响[J]. 中国生物医学工程学报, 2017, 36(4): 426-433.
Zhang Ying, Liu Houguang, Rao Zhushi, Huang Xinsheng, Yang Jianhua, Yang Shanguo. Effects of Different Stimulating Positions on the Hearing Compensation Performance of Piezoelectric Middle Ear Implant. Chinese Journal of Biomedical Engineering, 2017, 36(4): 426-433.
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