Carbon Dioxide (CO2 Content)
| Label Mnemonic: | CO2 |
| Epic code: | LAB55 |
| Order form: | Laboratory Requisition |
| Supply order: | Supply Order Form |
| Billing: | Billing Policies |
| CPT code: | 82374 |
Specimen(s):
Plasma
Collection Medium:
 |
| Plasma Separator Tube 4.5 mL |
Alternate
Collection Media:
Call laboratory for additional acceptable specimen collection containers.
Minimum:
3 mL whole blood from light green top tube or ONE
Microtainer® for
pediatric patients
Testing
Schedule:
24 hrs/day, 7 days a week, including holidays.
Turn Around
Time:
1 hour (upon receipt in laboratory)
Reference Range:
13 years and older: 22-29 mEq/L
0-12 years old: 18-27 mEq/L
Cord blood: 15-20 mEq/L
Critical value: <10 mEq/L and >=50 mEq/L
0-12 years old: 18-27 mEq/L
Cord blood: 15-20 mEq/L
Critical value: <10 mEq/L and >=50 mEq/L
Comments:
This test measures bicarbonate + dissolved CO2.
Test
Limitations:
Plasma Icterus: No significant interference up to an I index of 60 (approximate conjugated and unconjugated bilirubin concentration: 60 mg/dL). Hemolysis: Significant negative interference at an H index greater than 600. Lipemia (Intralipid): Significant negative interference at an L index greater than 1800 (approximate triglycerides concentration: 3600 mg/dL). There is poor correlation between turbidity and triglycerides concentration.
Methodology:
Enzymatic
Sample
Processing:
Centrifuge at a speed and time necessary to get barrier separation of plasma/serum and cells within 1 hour of collection. Send specimen in original tube. Do Not transfer to another tube.
Each sample must be labeled with at least TWO full patient identifiers (First/Last Name & DOB are sufficient for non-UIHC affiliated clients) to avoid sample rejection/delays.
Each sample must be labeled with at least TWO full patient identifiers (First/Last Name & DOB are sufficient for non-UIHC affiliated clients) to avoid sample rejection/delays.
Sample
Storage:
Refrigerate.
All sample storage requirements are intended for delivery to UIHC within 24 hours of collection for testing. If samples won't arrive in this time period, please call the UIHC Core Lab for alternative storage/shipping instructions (319-356-3527).
All sample storage requirements are intended for delivery to UIHC within 24 hours of collection for testing. If samples won't arrive in this time period, please call the UIHC Core Lab for alternative storage/shipping instructions (319-356-3527).
Transport
Instructions:
Place labeled specimen into zip-lock type biohazard bag; seal bag.
Place completed requisition into outside pocket of bag.
Transport in cooler with refrigerated coolant packs.
Place completed requisition into outside pocket of bag.
Transport in cooler with refrigerated coolant packs.
CPT Code:
82374
See also:
Carbon Dioxide (CO2 Content)-Other, Body Fluid
Carbon Dioxide (CO2 Content)-Other, Body Fluid
See Additional Information:
Chemistry Critical Lab Values
Chemistry Critical Lab Values