Bronchodilators and Lung Mechanics During Exercise in COPD

Recruiting now · Phase 4 · Has a placebo group

Conditions studied: COPD

In brief

Bronchodilators are medications that open the bronchi to help patients with COPD to breathe better. It is still not known exactly how this effect improves shortness of breath in people with COPD. The goal of this clinical trial is to determine whether bronchodilators lower resistance in the smallest airways in the lungs, and whether this will improve the feeling of breathlessness in these patients. The main questions the investigators attempt to answer are: * In patients with COPD, does treatment with a short-acting bronchodilator improve small airway resistance during exercise? * In patients with COPD, does acute treatment with short-acting bronchodilator improve breathlessness and exercise endurance? The investigators will compare short-acting bronchodilators to placebo (a substance that contains no drug) to see if the bronchodilator medications improve small airway resistance and breathlessness during exercise. Participants will: * Visit the research laboratory 3 visits to complete tests of lung function and exercise * Complete 2 identical visits (Visit 2 and 3), one in which the participant receives bronchodilator and one in which the participant receives placebo.

Key facts

Study ID: NCT06825013
Run by: Dr. J. Alberto Neder
People needed: 25
Starts: 2024-11-10
Expected to finish: 2027-01-01
Last updated by the study team: 2025-02-13

Who can join

Age: 40 and older. Sex: any. Healthy volunteers: not accepted.

You may qualify if…

Diagnosis of COPD
Male or female ≥40-years-of-age
Current or former smokers with ≥20 pack-year history
Forced expiratory volume in 1 second (FEV1)/ forced vital capacity (FVC)<lower limit of normal
Pre-Post Change of FVC ≥ 10% predicted after 400 mcg inhaled salbutamol
Functional residual capacity ≥120%predicted and/or the upper limit of normal
Modified Medical Research Council dyspnea scale ≥ 2
Clinically stable as defined by no exacerbations in the preceding 6 weeks
Ability to provide informed consent and perform all study procedures

You may not qualify if…

Major cardiopulmonary diseases other than COPD (asthma, interstitial lung disease, pulmonary hypertension, and congestive heart failure)
Neuromuscular or musculoskeletal disease
Use of daytime oxygen or exercise induced O2 desaturation to < 80% on room air;
Any other disorder that may contribute to exertional dyspnoea and/or exercise intolerance
Any contraindication to cardiopulmonary exercise testing

Where it is running

Respiratory Investigation Unit, Kingston Health Sciences Center — Kingston, Ontario, Canada (enrolling)

Full record on ClinicalTrials.gov

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