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List All Test Names Beginning With:
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Carboxyhemoglobin

Source Blood
Mnemonic COHB
Specimen Requirements

Test cannot be collected by Mobile Collection Service (MCS).

DO NOT use plasma separator tube (PST)

1 x 4 mL dark green top sodium heparin tube or 1 x 4 mL dark green lithium heparin tube. 
Whole blood.

Pediatric: 2.0 mL whole blood in a 1 x 4 dark green top sodium heparin tube or 1 x 4 mL dark green lithium heparin tube, or a dark green top lithium heparin non-PST microcollection tube filled completely.

Specimen Handling

Heparinized whole blood is stable for 72 hours at both room temperature and 4º C.
DO NOT freeze.
DO NOT centrifuge.
DO NOT open tube.

Additional Information CLS Accession:
If a specimen arrives from a non-CLS site, enter into PathNet before delivering to Chemistry.
Testing Location Chemistry-ACH, FMC, PLC, RGH, SHC
Rural: BMSH, CMGH, DDHS, HRH, SDHS
Testing Frequency As required
Alternate Name(s) Carbon Monoxide Exposure
Reference Interval

 8 - 150 years:  0.0  - 3.0 %

Click here for critical values.