What is feno testing

and how can it help?

Understand your airways

Get clarity in just one breath

When you have asthma, your airways can get angry, swollen and irritated, making it harder to breathe.¹ When this happens, a natural gas called nitric oxide gets produced more and released out in your breath.² Depending on how irritated your lungs are, the amount of this can vary person to person. Nitric oxide is like the smoke to the fire.

A feno test simply measures this and helps you and your doctor understand your condition better.³

A feno test is as simple and as easy as inhaling and exhaling!³ It's just like blowing bubbles into a drink through a straw, and it's over in just 10 seconds. It's a bit like a blood pressure test, just for your airways!

Watch Anna's video to learn more!

Why is it important?

Asthma symptoms can often fluctuate or go unnoticed.⁴

This is why tests like feno are so important. By testing feno at your asthma reviews you can stay on top of your airway health, helping you to breathe better.

The reassurance you need.

A high feno score might mean that you have asthma and need treatment.⁵ If you already have asthma, feno tests can give you the reassurance that your treatment is working well for you and reduce the chance of you having an asthma attack.^3,4

Breathing with confidence

It can spot issues early and help add clarity and confidence to your asthma management.^4,5

Making feno understandable

Discover Nurse Karen

Nurse Karen walks us through the entire process of taking a FeNO test, showing exactly what happens step by step, so you know what to expect during a feno test.

Follow Nurse Karen

Feno is a vital part of asthma assessments and is recommended in asthma clinical guidelines. It is essential for me that patients have an accurate and timely diagnosis, and they have the correct inhalers to manage symptoms and prevent asthma attacks

Get tested

Ask your healthcare provider about feno testing.

Even if you think your asthma is controlled, there could be something going on below the surface.⁴

If you do have symptoms like wheezing, chest tightness or difficulty breathing, it is especially important that you get checked out.¹

References:

1. Asthma and Lung UK. What is asthma? Available at: https://www.asthmaandlung.org.uk/conditions/asthma/what-asthma.

2. Asthma and Lung UK. FeNO test. Available at: https://www.asthmaandlung.org.uk/symptoms-tests-treatments/tests/feno-test

3. Ali H et al. The Potential of Fractional Exhaled Nitric Oxide as a Biomarker in Predicting and Optimizing Use of Treatment in Asthma. South East European Journal of Immunology. 2023;6(1):18-23.

4. Loewenthal L et al. FeNO in asthma. Semin Respir Crit Care Med. 2022;43:635-645

5. Busse W et al. Baseline FeNO as a prognostic biomarker for subsequent severe asthma exacerbations in patients with uncontrolled, moderate-to-severe asthma receiving placebo in the LIBERTY ASTHMA QUEST study: a post-hoc analysis. The Lancet Respiratory Medicine. 2021;9(10):1165-73.