*The case study presented is for educational purposes only and does not represent a real patient case. Similar results cannot be guaranteed and should not be considered typical.
FeNO testing helped identify a nonasthma-related condition with poor response to an inhaled corticosteroid/long-acting beta agonist (ICS/LABA).
Had FeNO been measured at the onset of this patient’s dyspneic symptoms, the symptoms may not have been attributed to a pulmonary inflammatory process. He possibly could have then avoided unnecessary asthma medication trials, chest x-rays, and repeat pulmonary function tests.