CPT/HCPCS
82374
Order Code
CH131
Turnaround Time
24 hours
Test Includes
CO2
Specimen Requirements
Specimen Source
Serum/Plasma
Transport Container
(Specimen Container)
(Specimen Container)
SST (Tiger Top)
Lithium Heparin/ Sodium Heparin
Preferred Specimens
Serum
Minimum Volume (uL)
.5 mL
Collection Instructions
(Transport Temperature)
(Transport Temperature)
Keep tube tightly capped for storage. Decreased CO2 can occurin the course of an hour once the specimen has been exposed to ambient air.
Transport refrigerated.
Specimen Stability
| Temperature | Period |
|---|---|
| Room temperature | SST, Lithium Heparin (without gel), Sodium Heparin: 2 hours; Serum Tube, Plasma Separator Tube: 8 hours |
| Refrigerated | Lithium Heparin (without gel): 2 days; Serum Tube, SST, Plasma Separator Tube, Sodium Heparin: 3 days |
| Frozen | 2 weeks |
Test Details
Methodology
PEP Carboxylase
Clinical Significance
The determination of serum carbon dioxide total (CO2) in conjunction with other clinical and laboratory information is necessary for the evaluation of acid-base status. A high CO2 content may be observed in compensated respiratory acidosis and metabolic alkalosis. A low CO2 content may be observed in compensated respiratory alkalosis and metabolic acidosis. Additional laboratory determinations will permit differentiation between metabolic and respiratory conditions.
Reference Ranges
22 – 32 mmol/L
Alternative Names
Carbon Dioxide
