Carboxyhemoglobin Quantitation, Whole Blood by Co-Oximetry
2005757
Ordering Recommendation
Use to diagnose increased carbon monoxide levels and its poisoning.
Mnemonic
CARBOXY HB
Methodology
Spectrophotometry
Performed
Varies
Reported
1-4 days
New York DOH Approval Status
This test is New York DOH approved.
Submit With Order
Specimen Required
- Patient Preparation
- Collect
- Green (sodium or lithium heparin). Do not collect by finger stick or heel stick. Collect Sunday-Thursday only.
- Specimen Preparation
- Keep specimen anaerobic; do not remove cap from collection tube. Refrigerate within 30 minutes after collection. Transport 5 mL whole blood. (Min: 0.5 mL) Specimen should be received within 24 hours of collection.
- Storage/Transport Temperature
- Refrigerated. Separate specimens must be submitted when multiple tests are ordered. Ship Sunday- Thursday only.
- Unacceptable Conditions
- Specimens collected in EDTA tubes or not anaerobically. Specimens that have been opened or exposed to room air. Frozen or room temperature specimens. Specimens containing air bubbles or clots.
- Remarks
- Stability
- Ambient: Unacceptable; Refrigerate: 72 hours; Frozen: Unacceptable
Reference Interval
Effective February 21, 2011
0.0-2.0 percent
0.0-2.0 percent
Interpretive Data
Individuals who smoke typically demonstrate higher Carboxyhemoglobin values than non-smokers.
| Non-smokers | 0-2.0 percent |
| 1-2 packs per day | 0-5.0 percent |
| 3-4 packs per day | 0-9.0 percent |
Components
| Component Test Code* | Component Chart Name | LOINC |
|---|---|---|
| 2005759 | Carboxyhemoglobin Quantitation | 20563-3 |
Aliases
- Carbon monoxide
- Co-ox
- Co-oximetry
- COHb concentration
- COHb levels
- COHb percent
- COHb%