Effect of Dielectric Properties of Cochlea on Electrode Insertion Guidance Based on Impedance Variation
The cochlear neuromodulator provides substantial auditory perception to those with impaired hearing. The accurate insertion of electrodes into the cochlea is an important factor, as misplaced may lead to further damage. The impedance measurement may be used as a marker of the electrode insertion gui...
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2024-11-01
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| author | Enver Salkim |
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| description | The cochlear neuromodulator provides substantial auditory perception to those with impaired hearing. The accurate insertion of electrodes into the cochlea is an important factor, as misplaced may lead to further damage. The impedance measurement may be used as a marker of the electrode insertion guidance. It is feasible to investigate the impact of the dielectric properties of the cochlea tissue layers on the electrode insertion guidance using sophisticated bio-computational methods that are impractical or impossible to perform in cochlear implant (CI) patients. Although previous modeling approaches of the cochlea argued that the capacitive impact of the tissue layer can be neglected using the quasi-static (QS) approximation method, it is widely accepted that tissue acts as a frequency filter. Thus, the QS method may not always be appropriate due to short-duration pulses. This study aimed to investigate the impact of the frequency-dependent dielectric properties of the cochlea tissue layers on the impedance variation by following a systematic approach. The volume conductor model of the cochlea layers was developed, the dielectric properties of each tissue layer were attained, and the cochlea neuromodulator settings were applied to obtain the results based on both QS and transient solution (TS) methods. The results based on the QS and TS methods were compared to define to what extent these parameters affect the outcome. It was suggested that the capacitive impact of the cochlea layers should be considered after a certain frequency level. |
| format | Article |
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| institution | OA Journals |
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| spelling | doaj-art-86c026a8fcf44df7987e349c575c732d2025-08-20T02:26:47ZengMDPI AGApplied Sciences2076-34172024-11-0114221040810.3390/app142210408Effect of Dielectric Properties of Cochlea on Electrode Insertion Guidance Based on Impedance VariationEnver Salkim0Department of Electronic and Electrical Engineering, University College London (UCL), Torrington Place, London WC1E 7JE, UKThe cochlear neuromodulator provides substantial auditory perception to those with impaired hearing. The accurate insertion of electrodes into the cochlea is an important factor, as misplaced may lead to further damage. The impedance measurement may be used as a marker of the electrode insertion guidance. It is feasible to investigate the impact of the dielectric properties of the cochlea tissue layers on the electrode insertion guidance using sophisticated bio-computational methods that are impractical or impossible to perform in cochlear implant (CI) patients. Although previous modeling approaches of the cochlea argued that the capacitive impact of the tissue layer can be neglected using the quasi-static (QS) approximation method, it is widely accepted that tissue acts as a frequency filter. Thus, the QS method may not always be appropriate due to short-duration pulses. This study aimed to investigate the impact of the frequency-dependent dielectric properties of the cochlea tissue layers on the impedance variation by following a systematic approach. The volume conductor model of the cochlea layers was developed, the dielectric properties of each tissue layer were attained, and the cochlea neuromodulator settings were applied to obtain the results based on both QS and transient solution (TS) methods. The results based on the QS and TS methods were compared to define to what extent these parameters affect the outcome. It was suggested that the capacitive impact of the cochlea layers should be considered after a certain frequency level.https://www.mdpi.com/2076-3417/14/22/10408bio-impedancecapacitive effectcochlea implantcomputational modelingdielectric propertiesquasi-static simulation |
| spellingShingle | Enver Salkim Effect of Dielectric Properties of Cochlea on Electrode Insertion Guidance Based on Impedance Variation Applied Sciences bio-impedance capacitive effect cochlea implant computational modeling dielectric properties quasi-static simulation |
| title | Effect of Dielectric Properties of Cochlea on Electrode Insertion Guidance Based on Impedance Variation |
| title_full | Effect of Dielectric Properties of Cochlea on Electrode Insertion Guidance Based on Impedance Variation |
| title_fullStr | Effect of Dielectric Properties of Cochlea on Electrode Insertion Guidance Based on Impedance Variation |
| title_full_unstemmed | Effect of Dielectric Properties of Cochlea on Electrode Insertion Guidance Based on Impedance Variation |
| title_short | Effect of Dielectric Properties of Cochlea on Electrode Insertion Guidance Based on Impedance Variation |
| title_sort | effect of dielectric properties of cochlea on electrode insertion guidance based on impedance variation |
| topic | bio-impedance capacitive effect cochlea implant computational modeling dielectric properties quasi-static simulation |
| url | https://www.mdpi.com/2076-3417/14/22/10408 |
| work_keys_str_mv | AT enversalkim effectofdielectricpropertiesofcochleaonelectrodeinsertionguidancebasedonimpedancevariation |