BMC pulmonary medicine
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BMC pulmonary medicine · Dec 2009
Effects of acute hypoventilation and hyperventilation on exhaled carbon monoxide measurement in healthy volunteers.
High levels of exhaled carbon monoxide (eCO) are a marker of airway or lung inflammation. We investigated whether hypo- or hyperventilation can affect measured values. ⋯ eCO measurements should not be performed during marked acute hyperventilation, like that induced in this study, but the influence of less pronounced hyperventilation or of hypoventilation is probably negligible in clinical practice.