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22410 Carbon Monoxide

Carbon Monoxide
Test Code: CO
Synonyms/Keywords
​​CO, Carboxyhemoglobin​
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)
​NoWhole Blood​Non-Gel barrier tube, either:  Lithium-heparin Green Top Tube (GTT)​ or Sodium-heparin Green Top Tube (GTT)Heparinized Syringe​4 mL​1 mL​ ​
Collection Processing Instructions
Avoid exposure of sample to atmosphere (beyond several minutes). For pediatric samples, transfer of anticoagulated whole blood to a small polypropylene tube or microcollection tube filling the tube in its entirety (to minimize any air exchange) is acceptable.​
Specimen Stability Information
Specimen Type Temperature Time
Whole Blood​ ​ Ambient​ 12 hours​
Refrigerate​ 72 hours​
Rejection Criteria

​​Collection tube that is not two-thirds full or if analysis delayed more than 72 hours
​Samples collected in gel barrier tubes (PST)​

Performing Laboratory Information
Performing Location Day(s) Test Performed Analytical Time Methodology/Instrumentation
Diagnostic Treatment Center​ ​Monday through Sunday​ ​Less than 2 hours​ ​Co-oximeter Multi-wavelength Spectrophotometry/Radiometer
Eau Claire​ ​Monday through Sunday ​Less than 2 hours Co-oximeter Multi-wavelength Spectrophotometry/Gem 4000
​Flambeau Hospital ​Monday through Sunday​ ​Less than 2 hours​ ​Co-oximeter Multi-wavelength Spectrophotometry/Gem 4000 
​Ladysmith Medical Center ​Monday through Sunday ​Less than 2 hours ​Co-oximeter Multi-wavelength Spectrophotometry/Gem 4000 ​
MMC-Rice Lake ​Monday through Sunday​ ​Less than 2 hours​ ​Co-oximeter Multi-wavelength Spectrophotometry/Gem 4000 
Marshfield​ Monday through Sunday​ Less than 2 hours​ Co-oximeter Multi-wavelength Spectrophotometry/Gem 4000
​Minocqua​Monday through Sunday​Less than 2 hours​Co-oximeter Multi-wavelength Spectrophotometry/Gem 4000
​Neillsville​Monday through Sunday​Less than 2 hours​Co-oximeter Multi-wavelength Spectrophotometry/Gem 4000​
Reference Range Information
Performing Location Reference Range
All Performing Sites
- Non-smokers: < or = 2.0%
- Smokers: < or = 9.0%
- Symptomatic: 10 – 20%
- Toxic: >20%
​See Critical Value List for list of current critical values ​
Outreach CPTs
CPT Modifier
(if needed)		 Quantity Description Comments
82375   ​ ​ ​ ​ ​
Synonyms/Keywords
​​CO, Carboxyhemoglobin​
Ordering Applications
Ordering Application Description
​Centricity ​Carbon Monoxide
​Cerner ​Carboxyhemoglobin 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)
​NoWhole Blood​Non-Gel barrier tube, either:  Lithium-heparin Green Top Tube (GTT)​ or Sodium-heparin Green Top Tube (GTT)Heparinized Syringe​4 mL​1 mL​ ​
Collection Processing
Avoid exposure of sample to atmosphere (beyond several minutes). For pediatric samples, transfer of anticoagulated whole blood to a small polypropylene tube or microcollection tube filling the tube in its entirety (to minimize any air exchange) is acceptable.​
Specimen Stability Information
Specimen Type Temperature Time
Whole Blood​ ​ Ambient​ 12 hours​
Refrigerate​ 72 hours​
Rejection Criteria

​​Collection tube that is not two-thirds full or if analysis delayed more than 72 hours
​Samples collected in gel barrier tubes (PST)​

Reference Range Information
Performing Location Reference Range
All Performing Sites
- Non-smokers: < or = 2.0%
- Smokers: < or = 9.0%
- Symptomatic: 10 – 20%
- Toxic: >20%
​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
Diagnostic Treatment Center​ ​Monday through Sunday​ ​Less than 2 hours​ ​Co-oximeter Multi-wavelength Spectrophotometry/Radiometer
Eau Claire​ ​Monday through Sunday ​Less than 2 hours Co-oximeter Multi-wavelength Spectrophotometry/Gem 4000
​Flambeau Hospital ​Monday through Sunday​ ​Less than 2 hours​ ​Co-oximeter Multi-wavelength Spectrophotometry/Gem 4000 
​Ladysmith Medical Center ​Monday through Sunday ​Less than 2 hours ​Co-oximeter Multi-wavelength Spectrophotometry/Gem 4000 ​
MMC-Rice Lake ​Monday through Sunday​ ​Less than 2 hours​ ​Co-oximeter Multi-wavelength Spectrophotometry/Gem 4000 
Marshfield​ Monday through Sunday​ Less than 2 hours​ Co-oximeter Multi-wavelength Spectrophotometry/Gem 4000
​Minocqua​Monday through Sunday​Less than 2 hours​Co-oximeter Multi-wavelength Spectrophotometry/Gem 4000
​Neillsville​Monday through Sunday​Less than 2 hours​Co-oximeter Multi-wavelength Spectrophotometry/Gem 4000​
For billing questions, see Contacts
Outreach CPTs
CPT Modifier
(if needed)		 Quantity Description Comments
82375   ​ ​ ​ ​ ​
For most current information refer to the Marshfield Laboratory online reference manual.