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Brain wave test may reveal hidden hearing in implant users

NCT ID NCT03025386

Knowledge-focused Sponsor: University Hospital, Montpellier 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
The trial has finished. Results may not be published yet.
Stopped early This study
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This status has not been confirmed recently, so it may be out of date.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 brain wave test called mismatch negativity (MMN) can measure how well adult cochlear implant users can tell apart similar sounds. Researchers compared the brain wave results to a standard hearing test using made-up words (logatoms). The goal was to find an objective way to check hearing, especially for people who cannot easily respond, like infants. However, the study was terminated early, so the findings are incomplete.

What this could mean

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

What this could lead to
If successful, this could lead to an objective hearing test for cochlear implant users, especially helping infants who cannot describe what they hear.
What could go wrong
The study was terminated early, so results are limited. The approach is still experimental and may not prove reliable enough for routine use.

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

May 2017

Finished

Jun 2022

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 to 75 years

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: * Aged from 18 to 75 * Severe to profound deafness * Cochlear implant user for over a year * Affiliation or beneficiary of the social insurance Exclusion criteria: * Phonetically balanced kindergarten score less than 25% * No steady setting * Contralateral hearing aid * Electroacoustic stimulation device or bilateral cochlear implant user * Inactive electrodes \> 3 * Cochlear Implant wore less than 7 hours per day * Disorders of memory, attention or executive functions * Associated disorders with deafness * No informed consent * Patient participating in other biomedical research * Patient who has undergone cochlear reimplantation or brain surgery * Withdrawal of consents * Patient lost to follow-up * Death

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Conditions

The condition(s) this trial relates to.

sensorineural hearing loss disorder

As listed by the trial registrant

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

Cochlear implant

Contacts and locations

Locations

  • CHU Montpellier

    Montpellier, 34000, France

More trials for these conditions

Other studies related to the condition(s) this trial covers.