LOINC long common name : Fractional concentration of exhaled nitric oxide;
LOINC short name : FeNO VFr;
LOINC description : The fractional concentration of exhaled nitric oxide, or FeNO, is used to assess the
amount of inflammation present in the lungs. Inflammatory cells produce NO, so higher
levels of NO indicate the presence of inflammation. The FeNO test is used to help
diagnose allergic or eosinophilic asthma as well as monitor treatment efficacy. [https://www.aaaai.org/conditions-and-treatments/library/asthma-library/feno-test];