FeNO Test for Asthma: What Is It and How Is It Performed?
A simple, non-invasive test to help assess airway inflammation
A FeNO (fractional exhaled nitric oxide) test is a quick, simple, and non-invasive breathing test that can help healthcare professionals assess inflammation in the airways and support the diagnosis and management of asthma.
In this short video, we demonstrate how a FeNO test is performed, so you can understand what to expect during the assessment.
In this video, you’ll learn:
- What happens during a FeNO test
- How to perform the breathing manoeuvre correctly
- What the test measures
- Why FeNO testing can be useful when assessing asthma
- What to expect during the procedure
What should I expect?
The test is straightforward and usually takes only a few minutes. You will be asked to breathe into a specialised device while following the instructions provided by your healthcare professional. The device measures the level of nitric oxide in your exhaled breath.
Watch the video below to see how the test works and how to perform it correctly.
Your healthcare professional will interpret your FeNO result alongside your symptoms, medical history, and other tests. A FeNO result on its own does not confirm or rule out asthma.
Please note: This video is for educational purposes and does not replace advice or assessment from a qualified healthcare professional.
