Carbon Dioxide Lvl (CO2)

Department: Chemistry
Test Synonym(s): LAB55, CO2, Carbon Dioxide Blood, Carbon Dioxide Level
CPT Codes: 82374
Methodology: PEP Carboxylase
Reference Range: 0-14 days: 5-20 mmol/L; 15 days-< 1 yr: 10-24 mmol/L; 1-< 5 yrs: 14-24 mmol/L; 5-<15 yrs: 17-26 mmol/L; 15-< 19 yrs 17-28 mmol/L; 19-<60 yrs: 22-29 mmol/L; 60-150 yrs: 23-31 mmol/L (Pediatric Reference Ranges only verified for serum, see CALIPER Study in Colantonio DA, et.al Clin Chem 2012;58(5):854-868.)
Tube Type: Light green top PST (Lithium Heparin with gel)
Specimen: Plasma
Alternate Specimen: Red top (no gel)
Pediatric Requirements: 1 light green top microtainer
Volume: 0.5 mL plasma
Minimum Volume: 1 light green top
Temperature: Separate within 1 hour and store/ship @ ambient temperature until delivery.
Stability: Room temperature: 24 hrs; Refrigerated: 7 days; Frozen: 2 weeks
Reasons for Rejection: Hemolysis, improper collection
Days Performed: Daily
Times Performed: Continuous
TAT: STAT: 1 hour; ROUTINE: 2 hours after receiving in lab

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