| Ordering Code | 148 |
|---|---|
| Test Name | CO2 |
| Alias | Carbon Dioxide Bicarbonate |
| Preferred Specimen | Serum |
| Preferred Container | SST (Gold) |
| Other Specimen/Container | Plasma in Lithium Heparin (Green), Serum in Plain (Red) |
| Optimum Volume | 0.5 mL |
| Handling Instructions | Keep specimen &/or aliquot samples capped. |
| Transport Requirements | Oahu: Ambient Airline: Refrigerated |
| Specimen Stability | Ambient: 24 Hours Refrigerated: 2 Days Frozen: 1 Month Once sample has been uncapped, it is stable refrigerated for 4 hours only. |
| Rejection Criteria | Grossly hemolyzed, Insufficient quantity, Specimen older than stability limits, Uncapped or loosely capped specimens/aliquots |
| Avail. Stat | YES |
| Analytic Time | 1 Day |
| Methodology | Enzymatic Colorimetric |
Reference range(s)
The reference ranges listed below are valid on this date of June 29, 2025.
| Component | Age | Male Norm | Male Critical Low | Male Critical High | Female Norm | Female Critical High | Female Critical Low | Units | Add'l info |
|---|---|---|---|---|---|---|---|---|---|
| CO2 | ALL | 21-30 | <= 10 | >= 40 | 21-30 | >= 40 | <= 10 | mEq/L |