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: 22 - 34 mmol/L.

Test Details
Days Set Up
Daily, 24 hours
Analytic Time

2 hours

Soft Order Code
CO2
MiChart Code
Carbon Monoxide, 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]
Rejection Criteria
No add ons for specimens older than 4 hours in lab.
Yellow Top Tube
Normal Volume
0.5 mL serum
Minimum Volume
0.25 mL serum
Billing
CPT Code
82374
Fee Code
20509
LOINC
2028-9
NY State Approved
No