Performance considerations of prosthetic actuators for round-window stimulation.

Hearing Research
Hideko Heidi NakajimaJohn J Rosowski

Abstract

Round-window (RW) stimulation has improved speech perception in patients with mixed hearing loss. In cadaveric temporal bones, we recently showed that RW stimulation with an active prosthesis produced differential pressure across the cochlear partition (a measure related to cochlear transduction) similar to normal forward sound stimulation above 1 kHz, when contact area between the prosthesis and RW is secured. However, there is large variability in the hearing improvement in patients implanted with existing modified prosthesis. This is likely because the middle-ear prosthesis used for RW stimulation was designed for a very different application. In this paper, we utilize recently developed experimental techniques that allow for the calculation of performance specifications for a RW actuator. In cadaveric human temporal bones (N=3), we simultaneously measure scala vestibuli and scala tympani intracochlear pressures, as well as stapes velocity and ear-canal pressure, during normal forward sound stimulation as well as reverse RW stimulation. We then calculate specifications such as the impedance the actuator will need to oppose at the RW, the force with which it must push against the RW, and the velocity and distance by which it ...Continue Reading

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Citations

Nov 20, 2012·Hearing Research·Christof StiegerHideko Heidi Nakajima
Feb 7, 2014·Journal of the Royal Society, Interface·Thomas D WeddellAndrei N Lukashkin
Dec 3, 2014·Otolaryngologic Clinics of North America·Thomas BeleitesThomas Zahnert
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Jan 3, 2020·The Journal of the Acoustical Society of America·Jing ZhangZhushi Rao
Dec 8, 2017·BioMed Research International·Wouter Johannes van DrunenHannes Maier
Apr 3, 2020·The Journal of the Acoustical Society of America·Lin XueXinsheng Huang
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Jul 8, 2021·Computer Methods in Biomechanics and Biomedical Engineering·Houguang LiuXinsheng Huang

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