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Test Code COHB or LAB56 Carboxyhemoglobin, whole blood

Specimen Requirements

Container Type:

Optimal:  Green Top

 

 

Acceptable: Mint Top or Heparinized syringe

 
Optimal Collection Volume: 

4 mL
Minimum Volume:

1 mL whole blood
Collection Instructions:
  1. Gently invert the sample 5-6 times after collection.
Specimen Transport:

Refrigerated
Processing Instructions: 
  1. Do not centrifuge
  2. Bring specimen directly to chemistry for testing.
  3. Place specimen on ice until testing can be performed.

Specimen Stability

Specimen Type Temperature Time
Whole blood

Refrigerated

7 days

Ambient 

7 days

Specimen Rejection Criteria

Quantity not sufficient

Useful For

Detecting the concentration of carbon monoxide in the blood.

Methodology

Radiometer ABL 800 systems - Optical system

Reference Ranges

 

 Test ID  

Classification

Reference Range and Reporting Units

COHB

Non-Smokers

0.0-2.5%

Smokers

1.5-5.0%

Heavy Smokers

up to 10%

 

Critical value: ≥ 15.0%*

 

*COHB is performed on any blood gas specimen whether or not the test is ordered

Interpretive

COHBB - Clinical & Interpretive: Carbon Monoxide, Blood (mayocliniclabs.com)

Day(s) Performed

24/7

Expected TAT

Same day

Performing Laboratory

Bronson Laboratory, Chemistry - Kalamazoo, Battle Creek, Paw Paw, South Haven

Sample Retention Time

7 days

CPT Code

82375

LOINC Code

20563-3