About
A FeNO test is a quick and easy way to measure swelling in the bronchial tubes (airways) of the lungs. The test may be done to diagnose asthma, check on chronic cough, or to see how well inhaled corticosteroid (ICS) treatment is working if you have already been diagnosed with asthma.
Need to know
-
What happens icon plus
- You'll be asked to sit down for the test. - You'll be asked to breath in as fully as possible and blow out at a steady pace for about 10 seconds. - The test normally takes about 5 minutes. -
How to prepare icon plus
No preparation is required before your FeNO test. -
Afterwards icon plus
You'll be able to resume your normal routine immediately following your FeNO test.
Our facilities
From complex surgery to straightforward procedures, we provide exceptional care across our network of hospitals, outpatient centres and specialist clinics.
Request an appointment
We're happy to help you make an appointment with one of our experienced consultants.
020 7079 4344
This content is intended for general information only and does not replace the need for personal advice from a qualified health professional.