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Breath test may predict sleep apnea severity without needles

NCT ID NCT07606898

Knowledge-focused Sponsor: Tanta University 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 This study
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 Results may not be published yet.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This status has not been confirmed recently, so it may be out of date.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 25, 2026 · Last updated Aug 26, 2026 · Updated 3 times

Summary

This study is testing whether a simple breath test, called fractional exhaled nitric oxide (FeNO), can help measure the severity of obstructive sleep apnea (OSA). Researchers will compare FeNO levels in 200 adults with different levels of sleep apnea to see if the test can predict moderate to severe cases. If it works, this could give doctors a non-invasive way to assess airway inflammation and improve how sleep apnea is managed.

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 a simple, non-invasive breath test to help diagnose and manage obstructive sleep apnea severity.
What could go wrong
This is an observational study, not a treatment trial. The breath test may not reliably predict sleep apnea severity, and results may not apply to smokers or people with other lung conditions.

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.

Participants

About 200 people

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

Started

May 2026

Expected to finish

Oct 2026

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.

Who is studied

Study Type: prospective observational cross sectional study. Sample Size: This study will be carried out on 200 patients' suspected for obstructive sleep apnea, following approval of medical research ethical committee of Tanta University, Faculty of Medicine. Sample size was calculated using this formula 2SD \^2 × (1.96 + 0.84)\^2 /d\^2 SD of FeNO 50 at moderate OSA 17.25 d is the difference between both means 21, 13.57 So at power of study 80% CI 95% Least Sample size will be 85 in each group

Ages

18 to 70 years

Sex

Anyone

Healthy volunteers

Accepted

You do not need to have the condition being studied to take part.

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: * Ages Eligible for study: 18 years till 70 years old. * Newly suspected OSA patients with Epworth Sleepiness Scale (ESS) ≥ 10. Exclusion Criteria: * Current smokers. * Any chronic Respiratory disorders other than OSA (asthma, COPD, allergic rhinitis, and atopic diseases). * Younger age than 18 years. * Recent inhaled or systemic corticosteroids within the pasr 4 weeks. * Recent respiratory infection less than 4 weeks. * Uncontrolled diabetes \& any chronic debilitating diseases (liver, renal, collagen diseases) Informed Consent will be taken from the participants before clinical examination.

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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 (OSA)

Contacts and locations

Locations

  • Tanta University

    Tanta, Egypt

More trials for these conditions

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