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Carbon Dioxide
Test Code38444
CPT Codes
82374<br>Limited Access Code
Preferred Specimen
1 full tube of serum collected in an unopened, spun serum separator tube
Minimum Volume
0.5 mL
Other Acceptable Specimens
5 mL plasma collected in sodium or lithium heparin (green-top) unopened tube or plasma separator tube
Instructions
Serum from a full unopened spun gel barrier tube. Do not open tube.
Transport Temperature
Room temperature
Specimen Stability
Room temperature: 72 hours
Refrigerated: 72 hours
Frozen: 31 days
Refrigerated: 72 hours
Frozen: 31 days
Reject Criteria (Eg, hemolysis? Lipemia? Thaw/Other?)
Anticoagulants other than heparin • Red top tube (no gel)
Methodology
Spectrophotometry
Setup Schedule
Set up: Daily; Report available: Next day
Reference Range
20-32 mmol/L
Clinical Significance
Measurements are used in the diagnosis and treatment of numerous potentially serious disorders associated with changes in body acid-base balance.
