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Exhaled carbon monoxide is not elevated in patients with asthma or cystic fibrosis
Increased levels of exhaled carbon monoxide (fractional concentration of CO in expired gas (FE,CO)), measured with an electrochemical sensor, have been reported in patients with inflammatory airwayExpand
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Origin of nitrite and nitrate in nasal and exhaled breath condensate and relation to nitric oxide formation
Background: Raised concentrations of nitrate and nitrite have been found in exhaled breath condensate (EBC) in airway disease, and it has been postulated that this reflects increased nitric oxideExpand
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Nasal and oral contribution to inhaled and exhaled nitric oxide: a study in tracheotomized patients
Nitric oxide (NO) is produced at different sites in the human airways and may have several physiological effects. Orally-produced NO seems to contribute to the levels found in exhaled air.Expand
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Oral bacteria--the missing link to ambiguous findings of exhaled nitrogen oxides in cystic fibrosis.
BACKGROUND Nitrite in exhaled breath condensate (EBC) has been shown to be elevated in cystic fibrosis (CF), while exhaled nitric oxide (FENO) is paradoxically low. This has been argued to reflectExpand
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Nitric oxide formation in the oropharyngeal tract: possible influence of cigarette smoking.
Cigarette smoking reduces the level of nitric oxide (NO) in exhaled air by an unknown mechanism. The view that part of the effect of cigarette smoking on NO production should occur in theExpand
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Increased exhaled nitrite in children with allergic asthma is not related to nitric oxide formation
Introduction:  Nitrite sampled from the upper airways could originate from inflammation‐induced nitric oxide (NO), as reports of elevated nitrite in exhaled breath condensate (EBC) from asthmaticsExpand
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Oropharyngeal origin of markers in exhaled breath