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Carboxyhemoglobin, Blood : 309
Test CodeCOHBQ or 309
Alias/See Also
Carbon monoxide poisoning
CPT Codes
82375
Instructions
Lavender (EDTA) or green (no gel) (sodium or lithium heparin). A full tube is preferred. Keep tube closed after collection.
Transport Container
Transport whole blood. Do not centrifuge whole blood. Do not uncap tube.
Transport Temperature
Refrigerated.
Specimen Stability
Ambient: 5 days; Refrigerated: 10 days; Frozen: Unacceptable
Reject Criteria (Eg, hemolysis? Lipemia? Thaw/Other?)
Fluoride oxalate (gray-top) tube; grossly clotted.
Methodology
Spectrophotometry
Setup Schedule
Sunday - Saturday
Report Available
3-4 days (From receipt at performing laboratory)
Reference Range
Non-Smoker less than 2 % of total Hgb Average Smoker 4-5 % of total Hgb Heavy Smoker 8-12 % of total Hgb Potentially Toxic greater than 15 % of total Hgb |
Clinical Significance
Carbon monoxide is the most common of the gaseous poisons. Malfunctioning or poorly ventilated heating appliances and internal combustion engines are frequent causes of carbon monoxide poisoning. Carbon monoxide combines reversibly with hemoglobin in a manner almost identical to oxygen resulting in a decrease in the amount of oxygen carried by hemoglobin. Accidental poisoning can occur even at low levels (greater than 0.01%) of CO in the atmosphere with prolonged exposure.
Performing Laboratory
Quest Diagnostics