The Codacs™ direct acoustic cochlear implant actuator: exploring alternative stimulation sites and their stimulation efficiency

PloS One
Martin GrossöhmichenH Maier

Abstract

This work assesses the efficiency of the Codacs system actuator (Cochlear Ltd., Sydney Australia) in different inner ear stimulation modalities. Originally the actuator was intended for direct perilymph stimulation after stapedotomy using a piston prosthesis. A possible alternative application is the stimulation of middle ear structures or the round window (RW). Here the perilymph stimulation with a K-piston through a stapes footplate (SFP) fenestration (N = 10) as well as stimulation of the stapes head (SH) with a Bell prosthesis (N = 9), SFP stimulation with an Omega/Aerial prosthesis (N = 8) and reverse RW stimulation (N = 10) were performed in cadaveric human temporal bones (TBs). Codacs actuator output is expressed as equivalent sound pressure level (eq. SPL) using RW and SFP displacement responses, measured by Laser Doppler velocimetry as reference. The axial actuator coupling force in stimulation of stapes and RW was adjusted to ~5 mN. The Bell prosthesis and Omega/Aerial prosthesis stimulation generated similar mean eq. SPLs (Bell: 127.5-141.8 eq. dB SPL; Omega/Aerial: 123.6-143.9 eq. dB SPL), being significantly more efficient than K-piston perilymph stimulation (108.6-131.6 eq. dB SPL) and RW stimulation (108.3-128.2 ...Continue Reading

References

Jul 1, 1995·The Journal of the Acoustical Society of America·M Kringlebotn
Mar 6, 2004·The Journal of the Acoustical Society of America·Stefan StenfeltRichard L Goode
Nov 30, 2004·Hearing Research·Stefan StenfeltRichard L Goode
Apr 5, 2007·Audiology & Neuro-otology·J J RosowskiS N Merchant
Feb 9, 2008·Audiology & Neuro-otology·Rudolf HäuslerMartin Kompis
Sep 27, 2008·Otology & Neurotology : Official Publication of the American Otological Society, American Neurotology Society [and] European Academy of Otology and Neurotology·Karl-Bernd HüttenbrinkDirk Beutner
Aug 4, 2010·Otology & Neurotology : Official Publication of the American Otological Society, American Neurotology Society [and] European Academy of Otology and Neurotology·Arnaud DevèzeDaniel J Tollin
Sep 30, 2010·Acta Oto-laryngologica·Stéphane TringaliDaniel J Tollin
Oct 21, 2010·IEEE Transactions on Bio-medical Engineering·Hans BernhardYves Perriard
May 20, 2011·Otolaryngology--head and Neck Surgery : Official Journal of American Academy of Otolaryngology-Head and Neck Surgery·J Eric LupoDaniel J Tollin
Nov 19, 2011·Audiology & Neuro-otology·Sebastian P SchravenErnst Dalhoff
Jun 29, 2012·Audiology & Neuro-otology·Michail ChatzimichalisAlexander M Huber
Nov 20, 2012·Hearing Research·Christof StiegerHideko Heidi Nakajima
Dec 1, 2012·Otology & Neurotology : Official Publication of the American Otological Society, American Neurotology Society [and] European Academy of Otology and Neurotology·Arnaud DevèzeDaniel J Tollin
Aug 8, 2013·Otology & Neurotology : Official Publication of the American Otological Society, American Neurotology Society [and] European Academy of Otology and Neurotology·Thomas LenarzHamidreza Mojallal
Nov 16, 2013·Otology & Neurotology : Official Publication of the American Otological Society, American Neurotology Society [and] European Academy of Otology and Neurotology·Susan BuschThomas Lenarz
Oct 18, 2014·The Journal of the Acoustical Society of America·M LauxmannS Ihrle

❮ Previous
Next ❯

Citations

Sep 10, 2016·BioMed Research International·Martin GrossöhmichenHannes Maier
Apr 18, 2019·Otology & Neurotology : Official Publication of the American Otological Society, American Neurotology Society [and] European Academy of Otology and Neurotology·Ute A GammHannes Maier
Nov 13, 2019·HNO·S LailachT Zahnert
Dec 8, 2017·BioMed Research International·Wouter Johannes van DrunenHannes Maier
Jun 11, 2021·Otology & Neurotology : Official Publication of the American Otological Society, American Neurotology Society [and] European Academy of Otology and Neurotology·Ute A GammHannes Maier

❮ Previous
Next ❯

Methods Mentioned

BETA
Cochlear Implant
dissection

Software Mentioned

Codacs
VibSoft
DACS PI

Related Concepts

Related Feeds

Cajal Bodies & Gems

Cajal bodies or coiled bodies are dense foci of coilin protein. Gemini of Cajal bodies, or gems, are microscopically similar to Cajal bodies. It is believed that Cajal bodies play important roles in RNA processing while gems assist the Cajal bodies. Find the latest research on Cajal bodies and gems here.