2 The technologies
2.1 Three devices, NIOX MINO, NIOX VERO and NObreath, used for measuring fractional exhaled nitric oxide (FeNO) concentration in the diagnosis and management of asthma were evaluated. All 3 devices are CE marked. Additional details of the devices are provided in section 4.
2.2 The devices and methods in this guidance were identified as being relevant to this assessment. NICE is aware that the devices and methods are evolving, so modifications and new devices are likely to be developed in the future.