Bronchodilator Reversibility Test: How It Works and What to Expect

A breathing test that helps assess asthma

A bronchodilator reversibility (BDR) test is a lung function test that can help healthcare professionals assess whether your airways respond to medication. It is commonly performed together with spirometry as part of an asthma assessment.

In this short video, we demonstrate how the bronchodilator reversibility test is performed, from the initial breathing measurements through to the repeat assessment after taking a bronchodilator.

In this video, you’ll learn:

• What happens during a bronchodilator reversibility test
• How spirometry is performed as part of the assessment
• Why a bronchodilator may be given during the test
• How your breathing is measured before and after the medication
• What the healthcare professional is looking for in the results

What should I expect?

You will be asked to breathe into a spirometer and perform a series of breathing manoeuvres following instructions from the healthcare professional. Your lung function is measured before and after you use a bronchodilator.

Comparing these measurements helps your healthcare professional determine whether your airflow improves after the medication. The result is considered together with your symptoms, medical history, and other test results when assessing asthma.

Watch the video below to see how the test is performed and what you can expect.