General
Synonym/Acronym:
CO2 combining power, CO2, Tco2.
Common Use:
To assess the effect of total carbon dioxide levels on respiratory and metabolic acid-base balance.
Specimen:
Serum (1 mL) collected in a red- or tiger-top tube, plasma (1 mL) collected in a green-top (lithium or sodium heparin) tube; or whole blood (1 mL) collected in a green-top (lithium or sodium heparin) tube or heparinized syringe.
Normal Findings:
(Method: Colorimetry, enzyme assay, or Pco2 electrode)
| Carbon Dioxide | Conventional & SI Units |
|---|
| Plasma or serum (venous) | |
| Infant–2 yr | 13–29 mmol/L |
| 2 yr–older adult | 23–29 mmol/L |
| Whole blood (venous) | |
| Infant–2 yr | 18–28 mmol/L |
| 2 yr–older adult | 22–26 mmol/L |
Carbon Dioxide has been found in Davis's Lab & Diagnostic Tests
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