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Test Code CRBXY Carboxyhemoglobin, LAB56

Performing Laboratory

St. Luke's Hospital Cedar Rapids

Specimen Requirements


Preferred: Heparinized Dark Green tube, whole blood

Acceptable: Heparinized syringe, whole blood

                      Cadaver blood also may be used for analysis.

Specimen Volume: 150 uL lithium heparin whole blood

Stability: Carboxyhemoglobin is stable in a refrigerated stored blood sample for several months.


Reference Values

Nonsmokers: 0.5-3.0%
Smokers: 1.5-9.0%

Critical value: >20%

Results ≥10% are reported to the Iowa Disease Surveillance System

Day(s) Test Set Up

Monday through Sunday

Useful For

Useful in the diagnosis of carbon monoxide poisoning.


Broad Spectrum Spectrometer Technology

Test Classification and CPT Coding