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Exhaled nitric oxide (eNO) is an endogenous gas involved in airway pathophysiology and is determined in orally exhaled air by various techniques. However, traditional single-breath technique (eNO(SB)) requires active cooperation and is not always easily practicable (especially in young children); simpler techniques including tidal breathing measurements (eNO(TB)) are not standardized. The aim of this study was to evaluate the possible correlation and correspondence between eNO(SB) and eNO(TB) and the impact of potential confounders in children with chronic adenotonsillar disease.

Head-to-head comparison of single-breath and tidal-breath exhaled nitric oxide measurements