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Simple 75-Second breath test could revolutionize asthma and COPD diagnosis

NCT ID NCT07253883

Diagnosis Sponsor: Liverpool Heart and Chest Hospital NHS Foundation Trust 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 Results may not be published yet.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This status has not been confirmed recently, so it may be out of date.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 is testing a new, easy way to diagnose asthma and COPD using a handheld device that measures carbon dioxide in a person's breath. Instead of the current uncomfortable and time-consuming lung tests, participants simply breathe normally into the device for 75 seconds. The goal is to see if artificial intelligence can accurately identify the correct diagnosis from the breath patterns, which could make diagnosis faster and more accessible in community clinics.

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 1,200 people

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

Expected to start

Apr 2026

An estimate. Start dates often move.

Expected to finish

May 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.

Who is studied

Participants with a suspicion of asthma and/or COPD

Ages

18 to 110 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: * Age ≥ 18 years * Referred for respiratory diagnostic testing with a clinical suspicion of asthma or COPD * Participant is willing and able to provide informed consent Exclusion Criteria: * Referred for respiratory diagnostic testing for a condition other than asthma or COPD, with no mention in the referral of a clinical suspicion of COPD or asthma * Participants who, in the opinion of the chief investigator, or their delegate, are unlikely to comply with the requirements of the study * Inability to give written informed consent * Participants who are acutely unwell * Patients unable to breathe through their mouths e.g. tracheostomy patients

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Conditions

The condition(s) this trial relates to.

asthma chronic obstructive pulmonary disease COPD, severe early onset disease

As listed by the trial registrant

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

Asthma (diagnosis) COPD (chronic obstructive pulmonary disease)

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

  • Liverpool Heart and Chest Hospital NHS Foundation Trust

    Liverpool, Merseyside, L14 3PE, United Kingdom

More trials for these conditions

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