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Breath test may catch lung disease before standard tests do

NCT ID NCT05092035

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
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 Results may not be published yet.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This status has not been confirmed recently, so it may be out of date.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 tested a new way to find early signs of lung damage in people with COPD or ILD by analyzing carbon dioxide (CO2) in their breath in real time. Researchers aimed to detect changes before standard lung function tests show any problems. The study included 40 adults, including patients and healthy smokers and non-smokers. This is an early research step to see if the method works, not a treatment.

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

40 people

The number who actually took part.

Started

Mar 2020

Finished

Mar 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 years and older

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: * all male and female patients older than 18 years who have COPD, ILD or are smokers and non smokers without pulmonary diseases. * right heart catheterization performed due to to suspected pulmonary hypertension and further clinical investigation like echocardiography, lung function testing, 6-minute walk test, laboratory testing and blood gas analysis. * written informed consent Exclusion Criteria: * contraindication for lung function testing * acute life-threatening disease (including acute myocardiac infarction, pulmonary embolism, large aortic aneurysma, pneumothorax, opthalmic, brain, abdominal or thoracic surgery within the last 4 weeks, hemoptysis).

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Conditions

The condition(s) this trial relates to.

As listed by the trial registrant

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

Contacts and locations

Locations

  • Department of Internal Medicine, Pulmonology

    Graz, Styria, 8036, Austria

More trials for these conditions

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