This new guideline from NICE looks at measuring exhaled Nitric Oxide (eNO) in asthma. I have never heard of this, so I’ll just lay out the guidance and then give a bit more of an explanation as to what this is all about.
Measuring eNO is recommended as an option to aid diagnosis of asthma in both adults and children if:
- There is an intermediate possibility of them having asthma (helpfully defined as where the diagnosis is uncertain)
- It is done in combination with other diagnostic options (eg clinical judgment / spirometry / reversibility testing etc).