Calculation of the Faradaic Impedance of the Electrode-Tissue Interface Improves Prediction of Behavioral T/C Levels in Cochlear Implant Patients.
Journal
The journal of international advanced otology
ISSN: 2148-3817
Titre abrégé: J Int Adv Otol
Pays: Turkey
ID NLM: 101522982
Informations de publication
Date de publication:
Oct 2023
Oct 2023
Historique:
medline:
1
11
2023
pubmed:
4
10
2023
entrez:
4
10
2023
Statut:
ppublish
Résumé
Fitting of cochlear implants is a labor-intensive process, and therefore automated fitting procedures are being sought. The objective of this study was to evaluate if decomposition of the complex impedance of the electrode-tissue interface could provide additional parameters that show improved correlation with the behavioral T/C levels. A new method for decomposing the complex impedance of the electrode-tissue interface was developed and tested in 18 patients in a prospective study in a tertiary otologic referral center. The averaged near-field Faradaic resistance (RF) calculated in study subjects shows a very strong correlation (R2=0.80) with the behavioral C levels and can be used for automated fitting in most patients. The standard deviation for the T levels and the C levels calculated for each of the electrode contacts in all study subjects is in the range of 10-15 CL and 15-20 CL, respectively. These higher values of the standard deviations are caused by a few outliers who require that additional parameters have to be added to the metric equation, allowing for the automated prediction of the T/C levels. A new method for deriving information from the electrode impedance measurements shows excellent correlation of the Faradaic resistance with the behavioral T/C levels in most patients and can be very useful for fitting cochlear implants based on objective measures. Since some patients still show discrepancies between the predicted T/C levels based on the RF calculation, additional parameters have to be added to the metric equation, allowing for automated prediction of the T/C levels.
Sections du résumé
BACKGROUND
BACKGROUND
Fitting of cochlear implants is a labor-intensive process, and therefore automated fitting procedures are being sought. The objective of this study was to evaluate if decomposition of the complex impedance of the electrode-tissue interface could provide additional parameters that show improved correlation with the behavioral T/C levels.
METHODS
METHODS
A new method for decomposing the complex impedance of the electrode-tissue interface was developed and tested in 18 patients in a prospective study in a tertiary otologic referral center.
RESULTS
RESULTS
The averaged near-field Faradaic resistance (RF) calculated in study subjects shows a very strong correlation (R2=0.80) with the behavioral C levels and can be used for automated fitting in most patients. The standard deviation for the T levels and the C levels calculated for each of the electrode contacts in all study subjects is in the range of 10-15 CL and 15-20 CL, respectively. These higher values of the standard deviations are caused by a few outliers who require that additional parameters have to be added to the metric equation, allowing for the automated prediction of the T/C levels.
CONCLUSION
CONCLUSIONS
A new method for deriving information from the electrode impedance measurements shows excellent correlation of the Faradaic resistance with the behavioral T/C levels in most patients and can be very useful for fitting cochlear implants based on objective measures. Since some patients still show discrepancies between the predicted T/C levels based on the RF calculation, additional parameters have to be added to the metric equation, allowing for automated prediction of the T/C levels.
Identifiants
pubmed: 37789622
doi: 10.5152/iao.2023.23695
pmc: PMC10645173
doi:
Types de publication
Journal Article
Langues
eng
Sous-ensembles de citation
IM
Pagination
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