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22244 Bicarbonate

Bicarbonate
Test Code: CO2
Synonyms/Keywords
HCO3, CO2, Total CO2​
Useful For
Carbon dioxide measurements are used in the diagnosis and treatment of numerous potentially serious disorders associated with changes in body acid-base balance.​
Specimen Requirements
Fasting Required Specimen Type Preferred Container/Tube Acceptable Container/Tube Specimen Volume Specimen Minimum Volume
(allows for 1 repeat)		 Pediatric Minimum Volume
(no repeat)
​No Plasma/Serum​
 
Lithium-heparin Plasma Separator  (PST)​, Serum Separator Tube (SST)
Lithium or Sodium-heparin Green Top (GTT),
Red Top Tube (RTT)
 
 1 mL​ 0.3 mL​ 0.6 mL whole blood​
Collection Processing Instructions
Full, unopened tube is preferred.​
Specimen Stability Information
Specimen Type Temperature Time
Plasma​/Serum ​ ​ Ambient​ 24 hours​
Refrigerate​ 1 week​
Frozen​ 3 months​
Rejection Criteria
Samples collected with potassium oxalate/sodium fluoride.​
Specimens on cells​
Performing Laboratory Information

Performing Location Day(s) Test Performed Analytical Time Methodology/Instrumentation
​Chippewa Falls ​​​Monday through Friday ​Less than 2 hours​ ​ISE/Siemens Dimension
Weston
 ​Monday through Sunday​ ​Less than 2 hours​ ​​ISE/Siemens Dimension
​Eau Claire ​Monday through Sunday​ ​Less than 2 hours​ ISE Assay/Beckman AU
​Park Falls
 ​Monday through Sunday​ ​Less than 2 hours​ ISE Assay/Beckman AU
​Ladysmith Medical Center ​​​Monday through Sunday ​Less than 2 hours​ ISE Assay/Beckman AU​
​Lakeview Medical Center ​Monday through Sunday​ Less than 2 hours​​ ​​ISE Assay/Beckman AU
Marshfield​ Monday through Sunday​ Less than 2 hours​ ISE Assay/Beckman AU
​Minocqua ​Monday through Sunday​ ​Less than 2 hours​ ISE Assay/Beckman AU
​Neillsville​Monday through Sunday​​Less than 2 hours​​​​ISE/Siemens Dimension​
​Stevens Point ​​​Monday through Friday ​Less than 2 hours​ ​​ISE Assay/Beckman AU​
​Wisconsin Rapids ​​​Monday through Friday ​Less than 2 hours​ ​​ISE/Siemens Dimension
Reference Range Information
Performing Location Reference Range
Marshfield​   0-2 months: 14-27 mmol/L
>= 2 months: 21-33 mmol/L ​
​See Critical Value List for list of current critical values ​
Outreach CPTs
CPT Modifier
(if needed)		 Quantity Description Comments
82374 ​ ​ ​ ​ ​
Synonyms/Keywords
HCO3, CO2, Total CO2​
Ordering Applications
Ordering Application Description
​Centricity

​a. Bicarbonate (CO2, HCO3)

b. CO2

Cerner​ ​Carbon Dioxide Level
If the ordering application you are looking for is not listed, contact your local laboratory for assistance.
Specimen Requirements
Fasting Required Specimen Type Preferred Container/Tube Acceptable Container/Tube Specimen Volume Specimen Minimum Volume
(allows for 1 repeat)		 Pediatric Minimum Volume
(no repeat)
​No Plasma/Serum​
 
Lithium-heparin Plasma Separator  (PST)​, Serum Separator Tube (SST)
Lithium or Sodium-heparin Green Top (GTT),
Red Top Tube (RTT)
 
 1 mL​ 0.3 mL​ 0.6 mL whole blood​
Collection Processing
Full, unopened tube is preferred.​
Specimen Stability Information
Specimen Type Temperature Time
Plasma​/Serum ​ ​ Ambient​ 24 hours​
Refrigerate​ 1 week​
Frozen​ 3 months​
Rejection Criteria
Samples collected with potassium oxalate/sodium fluoride.​
Specimens on cells​
Useful For
Carbon dioxide measurements are used in the diagnosis and treatment of numerous potentially serious disorders associated with changes in body acid-base balance.​
Reference Range Information
Performing Location Reference Range
Marshfield​   0-2 months: 14-27 mmol/L
>= 2 months: 21-33 mmol/L ​
​See Critical Value List for list of current critical values ​
For more information visit:
Performing Laboratory Information

Performing Location Day(s) Test Performed Analytical Time Methodology/Instrumentation
​Chippewa Falls ​​​Monday through Friday ​Less than 2 hours​ ​ISE/Siemens Dimension
Weston
 ​Monday through Sunday​ ​Less than 2 hours​ ​​ISE/Siemens Dimension
​Eau Claire ​Monday through Sunday​ ​Less than 2 hours​ ISE Assay/Beckman AU
​Park Falls
 ​Monday through Sunday​ ​Less than 2 hours​ ISE Assay/Beckman AU
​Ladysmith Medical Center ​​​Monday through Sunday ​Less than 2 hours​ ISE Assay/Beckman AU​
​Lakeview Medical Center ​Monday through Sunday​ Less than 2 hours​​ ​​ISE Assay/Beckman AU
Marshfield​ Monday through Sunday​ Less than 2 hours​ ISE Assay/Beckman AU
​Minocqua ​Monday through Sunday​ ​Less than 2 hours​ ISE Assay/Beckman AU
​Neillsville​Monday through Sunday​​Less than 2 hours​​​​ISE/Siemens Dimension​
​Stevens Point ​​​Monday through Friday ​Less than 2 hours​ ​​ISE Assay/Beckman AU​
​Wisconsin Rapids ​​​Monday through Friday ​Less than 2 hours​ ​​ISE/Siemens Dimension
For billing questions, see Contacts
Outreach CPTs
CPT Modifier
(if needed)		 Quantity Description Comments
82374 ​ ​ ​ ​ ​
For most current information refer to the Marshfield Laboratory online reference manual.