A FeNO of 62 ppb represents significant eosinophilic airway inflammation. At Pulmovista Clinics, this level of FeNO tells Dr. Dixit Kumar Thakur that: (1) asthma or eosinophilic bronchitis is very likely; (2) inhaled corticosteroid therapy is strongly indicated and should produce a good response; (3) if you are already on ICS and your FeNO remains this high, your inhaler technique or adherence may be suboptimal — or you may need a higher ICS dose; and (4) if your asthma remains uncontrolled despite optimised ICS, a FeNO of 62 ppb meets the threshold for Dupilumab biologic therapy eligibility.
