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Examining Local Network Processing using Multi-contact Laminar Electrode Recording

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Initial Experience With a Recently Developed Lateral Wall Electrode.

Zachary G Schwam^1,2, Vivian F Kaul^1,2, Enrique Perez^1,2

¹Department of Otolaryngology-Head and Neck Surgery, Icahn School of Medicine at Mount Sinai, New York, New York, U.S.A.

The Laryngoscope

|July 23, 2021

Summary

This study evaluated hearing preservation and speech recognition in cochlear implant patients using a new lateral wall electrode. While hearing preservation varied, patients showed significant speech understanding improvements post-implantation.

Keywords:

Cochlear implant advanced bionics hearing preservation residual hearing slim J

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Area of Science:

Otolaryngology
Biomedical Engineering
Auditory Neuroscience

Background:

Cochlear implantation is a key treatment for severe to profound hearing loss.
Evaluating new electrode designs is crucial for optimizing auditory rehabilitation outcomes.
Hearing preservation and speech recognition are primary metrics for assessing cochlear implant efficacy.

Purpose of the Study:

To assess hearing preservation rates with a novel lateral wall electrode (Advanced Bionics Hifocus™ SlimJ).
To evaluate speech recognition outcomes in patients implanted with this new electrode.
To identify any intra- and postoperative complications associated with the device.

Main Methods:

Retrospective cohort study of 61 patients (pediatric and adult) implanted between December 2017 and January 2020.
Hearing preservation was assessed using multiple definitions.
Speech recognition was measured using Arizona Biosciences (AzBio) and Consonant-Nucleus-Consonant (CNC) tests.

Main Results:

Hearing preservation rates ranged from 13.0% to 36.0% based on definition.
Significant improvements in speech recognition were observed (e.g., binaural AzBio from 46.1 to 65.9, P=.002).
Elderly patients exhibited the lowest hearing preservation rates; 5 explantations occurred due to infection or device failure.

Conclusions:

The new lateral wall electrode demonstrates significant speech recognition benefits despite variable hearing preservation.
Standardization of residual hearing and hearing preservation definitions is recommended.
Further research is needed to refine hearing preservation metrics in cochlear implant surgery.