Test Overview
Test Methodology
Colorimetric Enzymatic
Test Usage
Evaluation of acid-base balance
Reference Range *
1-4 years: 18 - 28 mmol/L, 5-11 years: 20 - 28 mmol/L, 12-150 years: 20 - 31 mmol/L.
* Reference ranges may change over time. Please refer to the original patient report when evaluating results.
Test Details
Days Set Up
Daily, 24 hours
Analytic Time
2 hours
Soft Order Code
CO2
MiChart Code
Carbon Dioxide, Blood
Synonyms
- Bicarbonate
- CO2
Laboratory
Chemical Pathology
Section
Automation
STAT Availability
STAT requests for this test will be performed on a STAT basis (supervisory staff approval is not required).
Specimen Requirements
Collection Instructions
Collect specimen in an SST tube. Centrifuge, aliquot serum into a plastic vial and refrigerate.
Alternate Specimen
Red top or Green top (sodium or lithium heparin) tube. [rev 11/09]
Normal Volume
0.5 mL serum
Minimum Volume
0.25 mL serum
Rejection Criteria
No add ons for specimens older than 4 hours in lab.
Billing
CPT Code
82374
Fee Code
20509
LOINC
2028-9