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Cochlear implant boosts hearing in One-Eared hearing loss

NCT ID NCT03052920

Symptom relief Sponsor: Washington University School of Medicine Source: ClinicalTrials.gov ↗

What the study statuses mean

This study's is highlighted.

Recruitment status, easiest to join first

Recruiting now
This trial is taking on new participants right now.
Not yet recruiting
Registered, but not yet taking participants.
By invitation only
Not open to general applications. Only people the study team invites can take part.
Paused
Paused for now. It may or may not start again.
Ongoing
Running, but no longer taking on new participants.
Completed This study
The trial has finished. Results may not be published yet.
Stopped early
Stopped early, before it reached the end. That can be for many reasons, including safety.
Cancelled
Cancelled before anyone took part.

Expanded access (not trials)

Expanded access
Not a trial. This treatment can be requested outside a study, case by case, for people who qualify.
Expanded access (paused)
Not a trial. The treatment can normally be requested outside a study, but is unavailable right now.
Expanded access (ended)
Not a trial. The treatment could once be requested outside a study, but no longer can.
Approved
The treatment has been approved, so it is available normally rather than through this programme.

When the status isn't known

Details not published
The full record has not been published yet, so there is little to show here.
Status unknown
This status has not been confirmed recently, so it may be out of date.

First seen Jun 27, 2026 · Last updated Jun 27, 2026

Summary

This study looked at whether a cochlear implant in the poorer ear can help adults with hearing loss in one ear who already use a hearing aid in the better ear. Forty adults who had trouble with standard hearing aids received a cochlear implant. Researchers measured word understanding and sound localization before and after the implant. The goal was to see if the implant improves hearing and quality of life.

What this could mean

Our plain-language read of the trial. This is informational only, not medical advice or a prediction.

Active substance
cochlear implant device
What this could lead to
If successful, this could show that cochlear implants improve hearing and sound localization for people with hearing loss in one ear.
What could go wrong
This is a small, completed study with only 40 participants, so results may not apply to everyone. There are also risks from surgery, such as infection or device failure.

This is an AI summary of the original study and may miss details. Read our disclaimer.

Study facts

What this study's own registry entry says, in plain language.

Phase

Not a phased trial

Phase numbers describe drug development. The registry uses this when they do not apply, as it does for trials of devices, procedures or behaviour changes, and for observational studies.

Participants

40 people

The number who actually took part.

Started

Jul 2017

Finished

Mar 2021

Lead sponsor

Other sponsor

The registry's catch-all category, for sponsors it does not file as a company, a government agency, or a research network.

Who can take part

This study's own entry requirements. Only the study team can say for certain whether you qualify.

Ages

18 years and older

Sex

Anyone

Healthy volunteers

Not accepted

This study is not open to healthy volunteers. The entry requirements below say who it is open to.

Show the full entry requirements

Copied word for word from the study's registry entry, so the wording is the study team's rather than ours.

Inclusion Criteria: * 18 years of age or older * English as the native language * Have a desire for functional binaural hearing * Have failed a previous hearing aid (HA) treatment for asymmetric hearing loss (BiCROS or poor ear HA) or willing to complete a trial if necessary * Willingness to comply with all study requirements * Ability to provide informed consent * Poor ear (ear to be implanted): * Pure-tone average (PTA) at .5, 1 and 2 kilohertz (kHz) \> 70 dB HL (hereafter referred to as severe to profound hearing loss - SPHL) * Aided word recognition score (CNC Word Test) at 60 dB SPL ≤ 30% * Duration of SPHL ≥ 6 months * Onset of hearing loss ≥ 6 years of age * Better ear: * PTA at .5, 1, 2, 4 kHz of 40 to 70 dB HL * Currently using a HA * Aided word recognition score (CNC Word Test) at 60 dB SPL \> 40% * Stable hearing for the previous 1-year period. "Stable" is defined as thresholds that have not changed by more than 10 dB at 2 or more octave interval audiometric frequencies Exclusion Criteria: * Medical condition that contraindicates surgery * Actively using an implantable device in the ear to be implanted * Known cochlear malformation or obstruction that would preclude full insertion of the electrode array in the ear to be implanted * Hearing loss of neural or central origin * Unrealistic expectations related to the benefits and limitations of cochlear implantation * Unwillingness or inability to comply with all investigational requirements

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Conditions

The condition(s) this trial relates to.

deafness, unilateral hearing loss disorder

As listed by the trial registrant

The condition terms exactly as the trial's registrant entered them.

Hearing loss

Contacts and locations

Locations

  • House Clinic

    Los Angeles, California, 90057, United States

  • New York University School of Medicine

    New York, New York, 10016, United States

  • Saint Luke's Midwest Ear Institute

    Kansas City, Missouri, 64111, United States

  • Washington University School of Medicine

    St Louis, Missouri, 63110, United States

More trials for these conditions

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