About Us News FeNO machine helps patients with asthma Thanks to your support, we are delighted to have funded a FeNO (Fractional Exhaled Nitric Oxide) machine that gives immediate and accurate results to speed up diagnosis and treatment for patients with asthma. A FeNO device is a novel medical technology used to help in the diagnosis of asthma. FeNO devices measure fractional exhaled nitric oxide in the breath of patients. Nitric oxide is a biomarker for asthma which provides an indication of the level of inflammation in the lungs. Although FeNO is primarily a diagnostic tool, it can also help in the ongoing monitoring of chronic asthma. Benefits of a FeNO include: Improved accuracy of diagnosis for patients suspected of having asthma Improved treatment due to a better understanding of a patient's condition Improved patient outcomes, reducing the risk of admissions to hospital Reduction in inappropriate treatment Reduction in the number of inappropriate referrals to secondary care clinics Manage Cookie Preferences