Functional Validation Of A Novel Technique For Assembling High Density Polyimide Cochlear Implants
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Functional Validation Of A Novel Technique For Assembling High Density Polyimide Cochlear Implants
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Author : Alton Russell Sharpe
language : en
Publisher:
Release Date : 2012
Functional Validation Of A Novel Technique For Assembling High Density Polyimide Cochlear Implants written by Alton Russell Sharpe and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2012 with Finite element method categories.
It has been hypothesized that increasing the number of active sites on a cochlear implant electrode array will enable the recipient to distinguish a higher number of pitch precepts, thus creating a more natural sound. While DSP processing strategies for cochlear implants have evolved significantly to address this, technology for the actual electrode array has remained relatively constant and limits the number of physical electrodes possible. Previous work introduced the concept of using Thin-Film Array (TFA) technology to allow for much higher site densities, although the original devices proved unreliable during surgical insertion tests. This work presents a new method of combining polyimide-based TFA's with supporting silicone insertion platforms to create assembled electrode arrays that are a more viable option for surgical insertion. The electrical and mechanical properties of these assemblies are investigated with physical deformation tests and finite element analysis in COMSOL to quantify how they will perform upon insertion into the cochlea, and the preliminary results of a surgical insertion study into human cadaveric temporal bones will be discussed.
Validation Of High Density Electrode Arrays For Cochlear Implants
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Author : Jessica Dominique Falcone
language : en
Publisher:
Release Date : 2011
Validation Of High Density Electrode Arrays For Cochlear Implants written by Jessica Dominique Falcone and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2011 with Microelectromechanical systems categories.
Creating high resolution, or high-density, electrode arrays may be the key for improving cochlear implant users' speech perception in noise, comprehension of lexical languages, and music appreciation. Contemporary electrode arrays use multipolar stimulation techniques such as current steering (shifting the spread of neural excitation in between two physical electrodes) and current focusing (narrowing of the neural spread of excitation) to increase resolution and more specifically target the neural population. Another approach to increasing resolution incorporates microelectromechanical systems (MEMS) fabrication to create a thin film microelectrode (TFM) array with a series of high density electrodes. Validating the benefits of high density electrode arrays requires a systems-level approach. This hypothesis will be tested computationally via cochlea and auditory nerve simulations, and in vitro studies will provide structural proof-of-concept.