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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

7days

Ambient 

7days

Specimen Rejection Criteria

Quantity not sufficient

Useful For

Detecting the concentration of carbon monoxide in the blood.

Methodology

Radiometer ABL 825 - 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