Test for asthma
Fractional Exhaled Nitric Oxide (FeNO) test
Using the FeNO test to measure the level of nitric oxide in your lungs can give an indication of asthma
What is a FeNO test?
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
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What happens during the test? icon plus
Lung function tests usually take place in a consultation room or lung function laboratory area.
- 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.
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How to prepare icon plus
No preparation is required before your FeNO test. -
After the test icon plus
You'll be able to resume your normal routine immediately following your FeNO test.
Our lung specialist consultants
Our locations
From complex thoracic surgery to diagnostic lung tests and procedures, we provide exceptional respiratory diagnostic care across our network of hospitals, outpatient centres and specialist clinics.
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The Wellington Hospital
Wellington Place
St John's Wood
London NW8 9LE
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London Bridge Hospital
27 Tooley Street
London
SE1 2PR
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The Harley Street Clinic
35 Weymouth Street
London W1G 8BJ
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The Lister Hospital
Chelsea Bridge Road
London
SW1W 8RH
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The Portland Hospital
205 - 209 Great Portland Street
London W1W 5AH
Book an appointment
Our team can help with any enquiries or you can make an appointment with one of our experienced consultants.
Call us today
020 7079 4344