New study aims to decode which lung test best predicts breathing relief
NCT ID NCT07364188
First seen Jun 24, 2026 · Last updated Jun 27, 2026 · Updated 1 time
Summary
This study will enroll 120 adults with asthma or COPD to see how changes in lung function tests (spirometry and impulse oscillometry) relate to how much their breathing improves after using a bronchodilator. Participants will take a standard reversibility test and report their symptom relief on a scale. The goal is to find the smallest meaningful change in these tests that matches real-world breathing improvement.
What this could mean
Our plain-language read of the trial. This is informational only, not medical advice or a prediction.
- Active substance
- Bronchodilator (beta-2-agonist)
- What this could lead to
- If successful, this study could help doctors better understand which lung function tests best reflect symptom relief after using a bronchodilator.
- What could go wrong
- This is an observational study that does not test a new treatment. Results may not change current practice or apply to all patients.
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
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About 120 people
The number the study aims to enrol. It can still change while the study runs.
- Expected to start
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Feb 2026
An estimate. Start dates often move.
- Expected to finish
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Dec 2027
An estimate. End dates often move.
- Lead sponsor
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A research network
The lead sponsor is a research network or cooperative group.
Who can take part
This study's own entry requirements. Only the study team can say for certain whether you qualify.
Who is studied
referred to Allergy and Lung Clinic Elsinore, Denmark for evaluation of Asthma and COPD (obstructive lung disease)
- Ages
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18 years and older
- Sex
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Anyone
- Healthy volunteers
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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 Hide 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: * Both asthma and COPD patients: 1. Written informed consent. 2. FEV1/Forced Vital Capacity (FVC) \<0.7 at baseline (7) 3. Visual Analog Scale (VAS) dyspnea score ≥10 (0-100, 100 max) (25,26). * Asthma: Doctor diagnosed asthma 1\. less than 10 packyears. * COPD: Doctor diagnosed COPD with FEV1/FVC \<0.7 post-bronchodilation 1. Smokers or ex-smokers with ≥10 packyears Exclusion Criteria: * Patients aged less than 18 years old. * Not able to perform spirometry or impulse oscillometry. * Cognitive disorders and not able to answer Asthma Control Questionnaire (ACQ), VAS dyspnea score, and COPD Assessment Test (CAT) score (25-28). * Short-acting beta-agonists 6 h, long-acting beta-agonists 2 days, short-acting anti-muscarinic agent 12 h, Long-acting anti-muscarinic agents 2 days. * Comorbidities with significant influence on dyspnea eg. bronchiectasis, ILS, mb. Cordis, lung resection, anemia, and active malignant disease * BMI ≥40 kg/m2.
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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.
How to take part
Only the study team decides who joins. These are the ways to reach them.
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The official record
ClinicalTrials.gov lists the study team's own contact details, including names and phone numbers. We don't republish those.
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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.
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