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Test Code LAB55 Carbon Dioxide (CO2)

Specimen Requirement

0.5 mL Serum or Lithium Heparin plasma; SSTand PST acceptable.

 

Tests performed on a fingerstick or heelstick specimen (capillary) will be noted as such.

Venous or arterial collection is the specimen of choice.

Samples should be tightly capped to prevent decreased CO2 levels.

Specimen Stability

Lithium Heparin and SST: 2 hours at 20-25° C

Plain Red and PST: 8 hours at 20-25° C

 

Lithium Heparin: 2 days at 2-8° C

Plain Red, SST, and PST: 3 days at 2-8° C

 

2 weeks at -20° C

 

Testing Schedule

Daily

Reference Range

23 – 33 mmol/L

Testing Department

Chemistry

Method

Enzymatic

CPT Code

82374

Additional Testing Locations

This test is also performed daily at the following Altru Clinics:

  • Crookston
  • Devils Lake

Please contact appropriate lab location for specific test information, as methodology varies by site.

Outpatient Turnaround Time

24 hours after receipt

Inpatient STAT Turnaround Time

40 minutes after receipt

Inpatient Routine Turnaround Time

4 hours after receipt