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Can using both ears boost speech understanding after a cochlear implant?

NCT ID NCT05325450

NEW Symptom relief Sponsor: University Hospital, Toulouse Source: ClinicalTrials.gov ↗

What the study statuses mean

This study's is highlighted.

Recruitment status, easiest to join first

Recruiting now This study
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 Results may not be published yet.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
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This status has not been confirmed recently, so it may be out of date.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 Sep 21, 2026 · Last updated Sep 21, 2026

Summary

Researchers at University Hospital, Toulouse are studying how adults with profound deafness in one ear and usable hearing in the other learn to understand speech after receiving a cochlear implant. The trial compares two training programs: listening with the implant alone versus listening with the implant plus the non-implanted ear. About 50 adults will take part, and the main measure is how many words they recognize correctly after training.

What this could mean

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

Active substance
speech training programs that use the cochlear implant alone or together with the other ear
What this could lead to
If combining the implanted ear with leftover natural hearing works better, it could shape how clinics train adults after cochlear implantation.
What could go wrong
This is a small, early study with no drug involved, so results may not hold for everyone or change practice on their own.

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

About 50 people

The number the study aims to enrol. It can still change while the study runs.

Started

May 2023

Expected to finish

Jan 2027

An estimate. End dates often move.

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: * Age\>18 * Unilaterally postlingually-deafened adult cochlear implanted candidates (IC-Uni) * Person with almost normal or moderate contralateral hearing ( under 60dB) * Cochlear implanted person whose activation has not yet been performed * Cochlear implanted subjects with bilateral post-lingual profound deafness, who already benefit from a unilateral cochlear implant and candidates to a bilateral cochlear implant * Affiliated to social security Exclusion Criteria: * \- Subjects under juridical protections or tutelage measure * Subjects with associated neurological or neurodegenerative conditions * Significant anatomical changes on CT scan of the temporal bone that may interfere with the insertion of the cochlear implant

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Conditions

The condition(s) this trial relates to.

Deafness hearing loss disorder

As listed by the trial registrant

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

Hearing loss

How to take part

Only the study team decides who joins. These are the ways to reach them.

  1. The places running it

    1 site. The list below names each one and where it is.

  2. The official record

    ClinicalTrials.gov lists the study team's own contact details, including names and phone numbers. We don't republish those.

    Open the record ↗

  3. A doctor treating you

    A doctor who knows your case can contact a study site on your behalf, and can tell you whether this study is worth pursuing at all.

Contacts and locations

Locations

  • Marx

    RECRUITING

    Toulouse, France

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