Finite Element Modeling of Residual Hearing after Cochlear Implant Surgery in Chinchillas
Castle, N.; Liang, J.; Smith, M.; Petersen, B.; Matson, C.; Eldridge, T.; Zhang, K.; Lee, C.-H.; Liu, Y.; Dai, C.
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Cochlear implant (CI) surgery is one of the most utilized treatments for severe hearing loss. However, the effects of a successful scala tympani insertion on the mechanics of hearing are not yet fully understood. This paper presents a finite element (FE) model of the chinchilla inner ear for studying the interrelationship between the mechanical function and the insertion angle of a CI electrode. This FE model includes a three-chambered cochlea and full vestibular system, accomplished using -MRI and -CT scanning technology. This models first application found minimal loss of residual hearing due to insertion angle after CI surgery and indicates that it is a reliable and helpful tool for future application in CI design, surgical planning, and stimuli setup.
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