When to use FeNO; understanding the clinical application of the test

FeNO is elevated in the presence of eosinophilic inflammation in the airways, commonly associated with allergic asthma.

There are three main indications for FeNO:

  1. to aid diagnosis
  2. in monitoring asthma control
  3. in monitoring inhaler compliance
Mark as Understood


All-Wales Asthma Diagnosis Guideline

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