ArticleIEEE transactions on bio-medical engineering2018
Impedance Measures During in vitro Cochlear Implantation Predict Array Positioning.
Article in IEEE transactions on bio-medical engineering, 2018. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 17 papers.
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Who cites it
17 citing papers in PubMed.
- Radiation-free cochlear implant position estimation in pediatric patients using impedance telemetry.BMC pediatrics · 2025Article
- Electrical equivalent circuit for analyzing the effect of signal shape on power distribution in cochlear implant electrodes and surrounding tissue.Scientific reports · 2025Article
- Electrode Impedance Subcomponent Analysis in Cochlear Implant Patients with Rising or Fluctuating Electrode Impedances.Audiology research · 2025Article
- Retrospective Analysis of Hearing Outcomes of Cochlear Implantation in Patients with Deafness Due to Congenital CMV Infection.Journal of clinical medicine · 2025Article
- Model-Based Inference of Electrode Distance and Neuronal Density from Measured Detection Thresholds in Cochlear Implant Listeners.Journal of the Association for Research in Otolaryngology : JARO · 2025Article
- Evaluation of an impedance-based method to monitor the insertion of the electrode array during cochlear implantation.European archives of oto-rhino-laryngology : official journal of the European Federation of Oto-Rhino-Laryngological Societies (EUFOS) : affiliated with the German Society for Oto-Rhino-Laryngology - Head and Neck Surgery · 2024Article
- Understanding the impact of modiolus porosity on stimulation of spiral ganglion neurons by cochlear implants.Scientific reports · 2024Article
- Tissue-Engineered Cochlear Fibrosis Model Links Complex Impedance to Fibrosis Formation for Cochlear Implant Patients.Advanced healthcare materials · 2023Article
- Robotic pullback technique of a precurved cochlear-implant electrode array using real-time impedance sensing feedback.International journal of computer assisted radiology and surgery · 2023Article
- Cochlear implant electrode impedance subcomponents as biomarker for residual hearing.Frontiers in neurology · 2023Article
- Real-Time Localization of Cochlear-Implant Electrode Arrays Using Bipolar Impedance Sensing.IEEE transactions on bio-medical engineering · 2022Article
- Access and Polarization Electrode Impedance Changes in Electric-Acoustic Stimulation Cochlear Implant Users with Delayed Loss of Acoustic Hearing.Journal of the Association for Research in Otolaryngology : JARO · 2022Article
- Insertion Guidance Based on Impedance Measurements of a Cochlear Electrode Array.Frontiers in computational neuroscience · 2022Article
- Using the electrically-evoked compound action potential (ECAP) interphase gap effect to select electrode stimulation sites in cochlear implant users.Hearing research · 2021Article
- Electrochemical impedance spectroscopy of human cochleas for modeling cochlear implant electrical stimulus spread.APL materials · 2020Article
- Measuring the Electrical Status of the Bionic Ear. Re-thinking the Impedance in Cochlear Implants.Frontiers in bioengineering and biotechnology · 2020Article
- Detection of Translocation of Cochlear Implant Electrode Arrays by Intracochlear Impedance Measurements.Ear and hearingArticle
Corrections and comments
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Authors and funding
4 authors.
Funding
Abstract
objectiveImproper electrode placement during cochlear implant (CI) insertion can adversely affect speech perception outcomes. However, the intraoperative methods to determine positioning are limited. Because measures of electrode impedance can be made quickly, the goal of this study was to assess the relationship between CI impedance and proximity to adjacent structures.
methodsAn Advanced Bionics CI array was inserted into a clear, plastic cochlea one electrode contact at a time in a saline bath (nine trials). At each insertion depth, response to biphasic current pulses was used to calculate access resistance (Ra), polarization resistance (Rp), and polarization capacitance (Cp). These measures were correlated to actual proximity as assessed by microscopy using linear regression models.
resultsImpedance increased with insertion depth and proximity to the inner wall. Specifically, Ra increased, Cp decreased, and Rp slightly increased. Incorporating all impedance measures afforded a prediction model (r = 0.88) while optimizing for sub-mm positioning afforded a model with 78.3% specificity.
conclusionImpedance in vitro greatly changes with electrode insertion depth and proximity to adjacent structures in a predicable manner. SIGNIFICANCE: Assessing proximity of the CI to adjacent structures is a significant first step in qualifying the electrode-neural interface. This information should aid in CI fitting, which should help maximize hearing and speech outcomes with a CI. Additionally, knowledge of the relationship between impedance and positioning could have utility in other tissue implants in the brain, retina, or spinal cord.
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