Jan 30, 2018




Clinical Hub,Tools & Resources,UWHC Lab Test Directory,Chemistry

Carbon Dioxide

Carbon Dioxide (CO2) Chemistry Lab Test

Name: Carbon Dioxide

Test Name: Carbon Dioxide

Health Link Test Code: CO2

LIS Test Code: CO2

CPT Code(s): 82374

Included In: Electrolytes Panel, Basic Metabolic Panel, Comprehensive Metabolic Panel

Methodology: PEP Carboxylase

Days Performed: Daily, 24 hours.

In-Lab Turnaround Time: 4 hours.

Stat In-Lab Turnaround Time: 1 hour.

Specimen: Blood

Collection Container: Green cap with yellow ring (PST)

Also Acceptable: Green top, Red cap with yellow ring (SST), Red top

Collection Instructions:

Tube must be at least one quarter full.

Collection Volume: 1 mL

Pediatric Collection Volume: 0.5 mL

Stability Ambient:

1 day

Stability Refridgerated:

7 days unopened

2 days if previously opened

Stability Frozen:

2 weeks

Sample Analyzed: Plasma or serum

Testing Volume: 0.5 mL

Pediatric Testing Volume: 0.2 mL

Specimen Processing:

Centrifuge. If a complete barrier has not formed, transfer cell-free plasma/serum to plastic vial. Tube or plastic vial must be 25% full and capped. Refrigerate.

Specimen Transport:

Transport specimen to the laboratory. Transport with coolant pack if coming from clinic location.



8 days and up: 22-29 mmol/L

Interpretation Type: Reference Interval