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The Cochlea

The Cochlea

The cochlea is a coiled structure in the inner ear that contains hair cells—the sensory receptors of the auditory system. Sound waves are transmitted to the cochlea by small bones attached to the eardrum called the ossicles, which vibrate the oval window that leads to the inner ear. This causes fluid in the chambers of the cochlea to move, vibrating the basilar membrane.

Hearing

Hearing

When we hear a sound, our nervous system is detecting sound waves—pressure waves of mechanical energy traveling through a medium. The frequency of the wave is perceived as pitch, while the amplitude is perceived as loudness.

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Related Experiment Video

Updated: Jun 3, 2025

Author Spotlight: Advancements in Impedance Monitoring for Cochlear Implant Surgery

Author Spotlight: Advancements in Impedance Monitoring for Cochlear Implant Surgery

Published on: August 4, 2023

Cochlear reimplantation rate, causes, and outcomes: a multicenter study.

Alimohamad Asghari¹, Mohammad Farhadi², Ahmad Daneshi²

¹Skull Base Research Center, The Five Senses Health Institute, School of Medicine, Iran University of Medical Sciences, Tehran, Iran.

Cochlear Implants International

|January 8, 2025

Summary

This summary is machine-generated.

Cochlear reimplantation occurs in 2% of cases, primarily due to device failure within 4 years. Most patients maintain or improve hearing and speech outcomes after reimplantation.

Keywords:

Cochlear implantation audiological outcomes categories of auditory performance cochlear reimplantation device failure medical issues reimplantation rate speech intelligibility rating

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Last Updated: Jun 3, 2025

Author Spotlight: Advancements in Impedance Monitoring for Cochlear Implant Surgery

Author Spotlight: Advancements in Impedance Monitoring for Cochlear Implant Surgery

Published on: August 4, 2023

Cochlear Implantation in the Guinea Pig

Cochlear Implantation in the Guinea Pig

Published on: June 15, 2018

Author Spotlight: Optimizing EAS with Long Electrodes for Enhanced Cochlear Coverage and Hearing Preservation

Author Spotlight: Optimizing EAS with Long Electrodes for Enhanced Cochlear Coverage and Hearing Preservation

Published on: October 11, 2024

Area of Science:

Otolaryngology
Biomedical Engineering
Audiology

Background:

Cochlear implantation is a vital treatment for severe to profound hearing loss.
Reimplantation may be necessary due to device complications or evolving patient needs.

Purpose of the Study:

To determine the rate, causes, and audiological outcomes of cochlear reimplantation.
To analyze outcomes in a large, multicenter cohort.

Main Methods:

Retrospective analysis of 9,287 primary cochlear implantations from 2000-2022 across five centers.
Evaluation of reimplantation rates, reasons, and comparison of auditory/speech outcomes pre- and post-reimplantation.

Main Results:

A cochlear reimplantation rate of 2% (186/9,287) was observed.
Device failure was the primary reason (81.2%) for reimplantation, with highest risk 2-4 years post-primary surgery.
Auditory performance and speech intelligibility remained stable or improved in over 93% of patients.

Conclusions:

Cochlear reimplantation rates are low, predominantly driven by device failure.
Regular follow-ups are crucial, especially within the first four years post-implantation.
Reimplantation generally preserves or enhances audiological and speech outcomes.