Value of diagnosis and management of the fractional concentration of exhale nitric oxide in children with asthma

Chronic airway inflammation was the essence of bronchial asthma.The clinical urgently need to get a objective marker of the airway inflammation to guide diagnosis and management of asthma.The fractional concentration of exhaled nitric oxide measurement was a practical and rapid test with immediate results.In this study,a review was performed in the research progress of diagnosis of asthma,airway inflammation monitoring,asthma severity rating and predicting asthma attack.