FeNO Interpretation

FeNO Interpretation: Clinical assessment of fractional exhaled nitric oxide in airway disease.

FeNO Measurement

ppb

Parts per billion (ppb)

Interpret Breath Test

Enter the FeNO measurement in parts per billion (ppb) to assess the level of Type 2 (eosinophilic) inflammation.

Guidelines & Evidence

Verified

Last Review: 2026

Diagnosis of eosinophilic airway inflammation in patients with suspected asthma.

Monitoring response to inhaled corticosteroids (ICS).

Predicting likelihood of asthma exacerbations.

Identifying Type 2 (T2-high) inflammation for biologic treatment selection.

Differentiating asthma from non-eosinophilic respiratory conditions (e.g., COPD, bronchiectasis).

Last Comprehensive Review: 2026

Scanning Medical Journals

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