Measurement of fractional nitric oxide in exhaled air

What is the measurement of fractional nitric oxide in exhaled air?

Exhaled air composition analysis focuses on the determination of nitric oxide (NO) and pH levels in exhaled air and biomarkers in exhaled breath condensate. It is an effective and minimally invasive diagnostic test in the differential diagnosis of persistent cough, in particular to differentiate asthma from eosinophilic bronchitis.

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Measurement of fractional nitric oxide in exhaled air