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Test Code LAB56 Carboxyhemoglobin

Synonym

  • COHGB

Specimen Required

Clinical Lab UH:
Preferred Container/Tube: Dry Lithium Heparin Syringe
Acceptable Container/Tube: Dry Lithium Heparin Syringe, Mint Green Top, Green Top Tube
Specimen Volume: Full syringe, 3 mL Mint/Green Top Tube
Specimen Minimum Volume: Full syringe, 1 mL Mint/Green Top Tube

 

Respiratory Therapy: 
Preferred Container/Tube: Dry Lithium Heparin Syringe
Acceptable Container/Tube: Dry Lithium Heparin Syringe
Specimen Volume: Full Syringe
Specimen Minimum Volume: Full Syringe

Specimen Stability Information

Ambient: 30 minutes

Rejected Due To

  • Unacceptable container type
  • Quantity not sufficient
  • Clotted specimens
  • Received >30 minutes from collection time

Reference Values

≤1.5 %

Interpretation

Carboxyhemoglobin is elevated in patients exposed to high exogenous sources of carbon monoxide such as cigarette smoke, vehicle exhaust, etc. or increased endogenous production such as hemolysis.

Method Description

Co-oximetry; COHb% = 100 x (COHb/THb) %

Performing Lab

Clinical Lab UH
Respiratory Therapy East
Respiratory Therapy Martha Morehouse
Respiratory Therapy UH

Day(s) Performed

Monday through Sunday

Reporting Name

Carboxyhemoglobin

CPT Code Information

82375

LOINC Code Information

20563-3