Beyond Spirometry: The Role of FeNO and Methacholine Challenge Testing

Recorded live at the APAPP Conference in Las Vegas, Brian Bizik, MS, PA-C, DFAAPA, and Heather O’Connell, PA-C, discuss how FeNO testing and methacholine challenge testing can support asthma diagnosis and management when spirometry does not provide a clear answer. They explain how fractional exhaled nitric oxide, or FeNO, offers insight into type 2 airway inflammation and may help clinicians evaluate treatment response, inhaled corticosteroid use, and potential biologic therapy options. The ...