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Mouthpiece design may skew lung strength tests, study finds

NCT ID NCT06435793

Knowledge-focused Sponsor: Laboratory of Movement, Condorcet, Tournai, Belgium Source: ClinicalTrials.gov ↗

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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 Results may not be published yet.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This status has not been confirmed recently, so it may be out of date.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 the type of mouthpiece used during a breathing test changes the results. 49 healthy adults performed maximum exhale maneuvers with different mouthpieces while researchers measured mouth pressure and muscle activity. The goal is to understand how equipment design affects test accuracy.

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 help standardize breathing tests for more accurate lung health assessments.
What could go wrong
This is a small, completed study in healthy volunteers only. Findings may not apply to people with lung or muscle diseases.

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

49 people

The number who actually took part.

Started

Sep 2024

Finished

Oct 2025

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 65 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: * Age over 18 Exclusion Criteria: * Any neuromuscular disease or condition susceptible to interfere with the results * Pregnant women * Any contraindications to the realization of maximal expiratory maneuvers, as defined in the ATS Pulmonary Function Laboratory Management And Procedure Manual (3rd Edition) * Excessive abdominal gird, compromising ultrasonographic positioning of electrodes or altering signal quality

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As listed by the trial registrant

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

Respiratory physiology

Contacts and locations

Locations

  • Haute Ecole Provinciale du Hainaut Condorcet

    Tournai, Belgium

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