Exhaled Nitric Oxide Make an Appointment Patient Education Find a Doctor Download Patient Education Exhaled nitric oxide is a simple test to measure the amount of nitric oxide in your breath. Nitric oxide is one of the many gases people exhale. It is a marker of airway inflammation. The results from this test make it easier for you and your doctor to monitor your asthma and find the best treatment plan for you. Download PDF: Exhaled Nitric Oxide Download PDF: Exhaled Nitric Oxide View more information on Exhaled Nitric Oxide National Jewish Health authors free downloadable patient education materials to provide you and your family the information and tools to help manage your disease. They include Understanding Booklets, Med Facts, Test Facts, Medication handouts and more. Search Free Education Materials