Background Fractional exhaled nitric oxide (FeNO) is an acceptable and noninvasive
marker for defining eosinophilic airway inflammation. Further study is necessary to clarify the …

The value of fractional exhaled nitric oxide (FeNO) in patients with chronic obstructive
pulmonary disease (COPD) remains unclear. We aimed to assess whether FeNO is a more …

Background: The use of fractional exhaled nitric oxide (FeNO) has been proposed for
identifying and monitoring eosinophilic airway inflammation in chronic obstructive …

Background Fractional exhaled nitric oxide (FENO) is a useful and noninvasive biomarker
for eosinophilic airway inflammation, particularly in asthma. However, its utility in chronic …

Introduction Measurements of eosinophils in induced sputum and fractional exhaled nitric
oxide (FeNO) are noninvasive biomarkers for assessing airway inflammation phenotypes in …

Background The fractional exhaled nitric oxide (FENO) test is useful in asthma patients.
However, a few studies on its usefulness in chronic obstructive pulmonary disease (COPD) …

Background and objective: Fractional exhaled nitric oxide (FENO) has been implicated as a
pulmonary biomarker in various respiratory diseases, including COPD. In this longitudinal …

Background Fraction of exhaled nitric oxide (FeNO) is a noninvasive indicator of
eosinophilic airway inflammation and has been used for the diagnosis and treatment of …

Background Fractional exhaled nitric oxide (FeNO) is known to useful biomarker for
detecting eosinophilic airway inflammation. However, there is a lack of evidence regarding …

Background: Fractional exhaled Nitric Oxide concentration (FeNO) is a measure of airway
inflammation. It is being used increasingly in asthma as a biomarker for eosinophilic airway …