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Carbon monoxide, CO, COHb, COH.
To identify the amount of carbon monoxide in the blood related to poisoning, toxicity from smoke inhalation, or exhaust from cars.
Whole blood collected in a green-top (heparin) or lavender-top (EDTA) tube, depending on laboratory requirement. Specimen should be transported tightly capped (anaerobic) and in an ice slurry if blood gases are to be performed simultaneously. Carboxyhemoglobin is stable at room temperature.
(Method: Spectrophotometry, co-oximetry)
|% Saturation of Hemoglobin|
|Nonsmokers||Up to 2%|
|Smokers||Up to 10%|