Blood eosinophil count or FeNO test

at diagnosis (repeat as clinically needed)

tests per year, UK, at diagnosis (repeat as clinically needed)

“Measure the blood eosinophil count or fractional exhaled nitric oxide (FeNO) level in adults with a history suggestive of asthma.”

NICE NG245, Asthma: diagnosis, monitoring and chronic asthma management, objective tests for adults, 2024-11

Kind of source
Clinical guideline
Read on
2026-11-06
Daily check
Quote found at the source on 2026-11-06
What to know
FeNO is a breath test; recorded here as a test result. No repeat interval is given.

Used in

Kept as evidence; no figure on the platform is computed from it yet.