Evaluation of Real-Time Intracochlear Electrocochleography for Guiding Cochlear Implant Electrode Array Position

Rachel Scheperle; Christine Etler; Jacob Oleson; Camille Dunn; Rustin Kashani; Alexander Claussen; Bruce Gantz; Marlan Hansen

doi:10.3390/jcm12237409

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Evaluation of Real-Time Intracochlear Electrocochleography for Guiding Cochlear Implant Electrode Array Position

Journal article

Open access

Peer reviewed

Evaluation of Real-Time Intracochlear Electrocochleography for Guiding Cochlear Implant Electrode Array Position

Rachel Scheperle, Christine Etler, Jacob Oleson, Camille Dunn, Rustin Kashani, Alexander Claussen, Bruce Gantz and Marlan Hansen

Journal of clinical medicine, Vol.12(23), 7409

01/01/2023

DOI: 10.3390/jcm12237409

PMCID: PMC10707171

PMID: 38068461

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Abstract

This study evaluates intracochlear electrocochleography (ECochG) for real-time monitoring during cochlear implantation. One aim tested whether adjusting the recording electrode site would help differentiate between atraumatic and traumatic ECochG amplitude decrements. A second aim assessed whether associations between ECochG amplitude decrements and post-operative hearing loss were weaker when considering hearing sensitivity at the ECochG stimulus frequency compared to a broader frequency range. Eleven adult cochlear implant recipients who were candidates for electro-acoustic stimulation participated. Single-frequency (500-Hz) ECochG was performed during cochlear implantation; the amplitude of the first harmonic of the difference waveform was considered. Post-operative hearing preservation at 500 Hz ranged from 0 to 94%. The expected relationship between ECochG amplitude decrements and hearing preservation was observed, though the trend was not statistically significant, and predictions were grossly inaccurate for two participants. Associations did not improve when considering alternative recording sites or hearing sensitivity two octaves above the ECochG stimulus frequency. Intracochlear location of a moving recording electrode is a known confound to real-time interpretation of ECochG amplitude fluctuations, which was illustrated by the strength of the correlation with ECochG amplitude decrements. Multiple factors contribute to ECochG amplitude patterns and to hearing preservation; these results highlight the confounding influence of intracochlear recording electrode location on the ECochG.

Acoustics

Cochlear Implants

Physiology

Trauma

Electrodes

Feedback

Fourier transforms

Hearing loss

Signal to noise ratio

Details

Title: Subtitle: Evaluation of Real-Time Intracochlear Electrocochleography for Guiding Cochlear Implant Electrode Array Position
Creators: Rachel Scheperle - University of Iowa
Christine Etler - University of Iowa
Jacob Oleson - University of Iowa
Camille Dunn - University of Iowa Hospitals and Clinics
Rustin Kashani - University of Iowa Hospitals and Clinics
Alexander Claussen - University of Iowa
Bruce Gantz - University of Iowa
Marlan Hansen - University of Iowa
Resource Type: Journal article
Publication Details: Journal of clinical medicine, Vol.12(23), 7409
DOI: 10.3390/jcm12237409
PMID: 38068461
PMCID: PMC10707171
NLM abbreviation: J Clin Med
eISSN: 2077-0383
Publisher: MDPI AG
Grant note: name: National Institutes of Health, award: NIH/NIDCD P50 DC 000242
Language: English
Date published: 01/01/2023
Academic Unit: Communication Sciences and Disorders; Molecular Physiology and Biophysics; Biostatistics; Neurosurgery; Otolaryngology
Record Identifier: 9984521458902771

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