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Reference values for exhaled nitric oxide (reveno) study Olivieri M; Talamini G; Corradi M; Perbellini L; Mutti A; Tantucci C; Malerba MRespir Res 2006[Jun]; 7 (1): 94BACKGROUND: Despite the widespread use of fractional exhaled nitric oxide (FENO) as a biomarker of airways inflammation, there are no published papers describing normal FENO values in a large group of healthy adults. OBJECTIVE: The aim of this study was to establish adult FENO reference values according to the international guidelines. METHODS: FENO was measured in 204 healthy, non-smoking adults with normal spirometry values using the on-line single-breath technique, and the results were analysed chemiluminescently. RESULTS: The main result of the study was the significant difference in FENO values between men and women, thus indicating that gender-based reference FENO values are necessary. The FENO levels obtained at expiratory flows of 50 ml/s ranged from 2.6 to 28.8 ppb in men, and from 1.6 to 21.5 ppb in women. CONCLUSION: We propose reference FENO values for healthy adult men and women that could be used for clinical and research purposes.|*Breath Tests/methods[MESH]|Adult[MESH]|Female[MESH]|Humans[MESH]|Italy[MESH]|Male[MESH]|Middle Aged[MESH]|Nitric Oxide/*analysis[MESH]|Practice Guidelines as Topic[MESH]|Reference Values[MESH]|Reproducibility of Results[MESH]|Sex Factors[MESH]|Spirometry[MESH] |
