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Sleep apnea treatment not enough? study probes lingering drowsiness

NCT ID NCT07545421

Knowledge-focused Sponsor: Hospices Civils de Lyon 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 This study
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 Results may not be published yet.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This status has not been confirmed recently, so it may be out of date.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 Jun 27, 2026 · Last updated Jun 27, 2026

Summary

This study looks at why many people with obstructive sleep apnea still feel very sleepy during the day even after successful treatment with CPAP or other devices. Researchers will test 100 adults to see if the amount of oxygen drops during sleep before treatment predicts this leftover sleepiness. They will also compare simpler alertness tests to the standard, hard-to-get Maintenance of Wakefulness Test to find better ways to check driving safety.

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 100 people

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

Expected to start

May 2026

An estimate. Start dates often move.

Expected to finish

May 2029

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: * Adults aged 18 years or older. * Newly diagnosed moderate to severe obstructive sleep apnea, defined by an apnea-hypopnea index (AHI) ≥15 events/hour on diagnostic polysomnography. * Indication for obstructive sleep apnea treatment (continuous positive airway pressure, mandibular advancement device, positional therapy, or wake-promoting pharmacological treatment) as determined by the treating clinician. * Indication for Maintenance of Wakefulness Test due to reported sleepiness, declared or suspected accident risk, or professional driving or safety-related occupation. Exclusion Criteria: * Previous treatment for obstructive sleep apnea. * Major cognitive impairment or language barrier preventing valid completion of vigilance tests or questionnaires. * Refusal or inability to undergo the Maintenance of Wakefulness Test. * Comorbid sleep disorders associated with hypersomnolence, including narcolepsy or idiopathic hypersomnia. * Pregnant or breastfeeding women. * Persons deprived of liberty by judicial or administrative decision, persons under legal protection (guardianship or curatorship), persons admitted to a health or social institution for reasons other than research, persons receiving compulsory psychiatric care, or persons not affiliated with a social security system or equivalent.

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Conditions

The condition(s) this trial relates to.

obstructive sleep apnea syndrome

As listed by the trial registrant

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

Obstructive sleep apnea

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

  • Hopital Lyon Croix Rousse

    Lyon, 69004, France

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