Laboratory: Clinical Biochemistry
Test Name:
Test Code: CO2
Clinical Information:
Bicarbonate measurements are used in the diagnosis and treatment of numerous potentially serious disorders associated with acid-base imbalance in the respiratory and metabolic systems. An elevated anion gap strongly suggests the presence of metabolic acidosis. The serum anion gap is calculated automatically on sera analyzed for Na+, Cl- and total CO2.
Anion gap = Na - (Cl + TCO2)
Collection Devices:
Specimen Required:

Plasma: 2.0 mL
Pediatric Plasma: 0.2 mL

Separate from cells and store tightly capped.
Stability 40 hours at room temperature, 7 days refrigerated, 6 months frozen
Serum: 2.0 mL

Samples must be transferred to an aliquot tube, tightly capped and stored frozen if analysis will not be complete within 48 hours (#110-10-05 Serum / Plasma Separation Procedure and Transport)
Reference Values:
22 – 30 mmol/L
Stat or Routine
See Also:
More Information: