| Ordering Code | 6532 |
|---|---|
| Test Name | Carboxyhemoglobin |
| Alias | Carbon Monoxide |
| Preferred Specimen | Whole Blood |
| Preferred Container | For QMC draws: Heparinized Syringe (Lithium Heparin) For other draw sites: Lithium Heparin |
| Other Specimen/Container | Whole Blood in Lithium Heparin (Green) Whole Blood in Lithium Heparin PST (Green) |
| Optimum Volume | 0.5 mL |
| Collection Instructions | If using heparinized syringe: Remove needle and place luer tip cap on end of syringe. |
| Handling Instructions | Do NOT centrifuge specimen QMC Punchbowl Hospital draws: Place tightly capped specimen on wet ice and forward to the lab within 2 hours of collection Other draw sites: Immediately after collection, place specimen in refrigerator. |
| Transport Requirements | Oahu: Refrigerated Airline: Refrigerated |
| Specimen Stability | Heparinized Syringe: 2 Hours Refrigerated Lithium Heparin or Lithium Heparin PST tube: 3 days (unopened) Refrigerated |
| Rejection Criteria | Ambient, Frozen, Hemolyzed, Specimen older than stability limits, Specimen uncapped. |
| Avail. Stat | YES |
| Analytic Time | 1 Day |
| Methodology | Co-oximetry |
Reference range(s)
The reference ranges listed below are valid on this date of November 22, 2025.
| Component | Age | Male Norm | Male Critical Low | Male Critical High | Female Norm | Female Critical High | Female Critical Low | Units | Add'l info |
|---|---|---|---|---|---|---|---|---|---|
| Source | ALL | See report. | |||||||
| Hemoglobin | ALL | 14.0-18.0 | <= 5.9 | 12.0-16.0 | <= 5.9 | g/dL | |||
| CarboxyHemoglobin | ALL | < 2.0 | >= 20.1 | < 2.0 | >= 20.1 | % |
