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Specimen Collection Manual and Test Catalog

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CO2

Geisinger Epic Procedure Code:  LAB2037    Geisinger Epic ID:  14325

SPECIMEN COLLECTION
Specimen type: 

Plasma or Serum


Preferred collection container: 
Specimen required: 

2 mL of serum or plasma; minimum 0.2 mL.


Special notes: 

DO NOT OPEN TUBE.



SPECIMEN PROCESSING
Processing instructions: 

Allow serum to clot. Centrifuge to separate serum or plasma within 2 hours of collection.


Transport temperature: 

Refrigerated.


Specimen stability: 

Recapped/capped and centrifuged specimens with gel separators are stable for 7 days refrigerated, 40 hours at room temperature. Specimens not centrifuged are stable for 16 hours.


Rejection criteria: 

Specimens beyond stability limits. Reject specimen if found uncapped for extended period of time. No add-ons to previously uncapped aliquot/short sample.



TEST DETAILS
Reference interval: 

22-32 mmol/L


Additional information: 

Specimens for add-on testing are to be processed and taken immediately to a technologist for analysis.


CPT code(s):  82374
Note: The billing party has sole responsibility for CPT coding.  Any questions regarding coding should be directed to the payer being billed.
The CPT codes provided by GML are based on AMA guidelines and are for informational purposes only.

Test includes: 

Carbon dioxide total.


Methodology: 
Spectrophotometric (Colorimetric)
Synonyms: 

Bicarbonate, CO2 Total, carbon, CO2


Clinical significance: 

Measurements are used in the diagnosis and treatment of numerous potentially serious disorders associated with changes in body acid-base balance.


Doctoral Director(s): 
Hoi-Ying Elsie Yu, PhD, DABCC, FADLM
Sheng-Ying (Margaret) Lo, PhD, DABCC
Review Date:  12/27/2024

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