Test Code CO2 Carbon Dioxide, Total (CO2), Plasma or Serum
Methodology
Enzymatic
Performing Laboratory
Aspen Valley Hospital
Specimen Requirements
Submit only 1 of the following specimens:
Preferred:
Plasma
Container/Tube: Light green-top (lithium heparin gel) tube(s)
Specimen:  2 mL (minimum
volume:  0.5 mL) of lithium heparin plasma
Transport Temperature:  Ambient
Collection Instructions:  Spin down
immediately and send entire tube to laboratory. If there is a delay
in transport of >8 hours, send specimen refrigerated.
Note:  1. Indicate plasma on request
form.
2. Label specimen appropriately (plasma).
Alternate:
Serum
Container/Tube:  Gold-top serum gel tube(s)
- Plain, red-top tube is also acceptable.
Specimen:  2 mL (minimum
volume:  0.5 mL) of serum
Transport Temperature:  Ambient
Collection Instructions: Allow specimen to clot for approximately 10 minutes and spin down. If drawing gold-top serum gel tube, send entire tube to laboratory. If drawing orange-top tube or plain, red-top tube, remove serum and place in separate plastic vial. If there is a delay in transport of >8 hours, send specimen refrigerated.
Note:  1. Indicate serum on request
form.
2. Label specimen appropriately (serum).
Reference Values
21-32 mmol/L
Day(s) Test Set Up
Monday through Sunday
Test Classification and CPT Coding
82374
 
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