Non-invasive screening of carboxyhemoglobin saturation (SpCO) in the emergency department to detect occult
exposure is increasingly common. The SpCO threshold to consider exposure in smokers is up to 9%. The literature supporting
this cutoff is inadequate, and the impact of active smoking on SpCO saturation remains unclear. The primary objective was to
characterize baseline SpCO in a cohort of smokers outdoors. Secondary objectives were to explore the impact of active smoking
on SpCO and to compare SpCO between smokers and non-smokers

EB00000003667K

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• Carboxyhemoglobin Levels Induced by Cigarette Smoking Outdoors in Smokers