Fractional exhaled Nitric Oxide (FeNO) measurement is a modern, simple, and reliable test used to assess airway inflammation, primarily in children with asthma.
What is FeNO:
FeNO measures the levels of nitric oxide in exhaled air, which are elevated when eosinophilic inflammation is present in the bronchi.
It is a biomarker that helps in understanding the type of inflammation and in personalizing treatment.
When is it needed?
The test is indicated for:
- diagnosis and confirmation of asthma
- assessment of airway inflammation
- monitoring response to inhaled corticosteroids
- evaluation of treatment adherence.
How it is performed:
The child exhales slowly and steadily into a specialized device. The procedure is brief and requires cooperation (usually suitable for children aged 5-6 years and older).
Why it is important:
FeNO enables:
- targeted asthma treatment
- avoidance of over- or under-treatment
- better disease control
- long-term monitoring.
