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Carboxy Haemoglobin

Category Biochemistry
Test background

Carboxyhaemoglobin forms following exposure to carbon monoxide. Carbon monoxide binds much more avidly to haemoglobin than oxygen.

Clinical Indications

Determine whether high COHb levels are present decreasing oxygen availability to tissues

Reference range

< 1.5 % in non smokers
Concentrations in smokers are higher.

Sample & container required Preferably a blood gas syringe. If not, a lithium heparin
Sample volume Gas syringe 0.5 mL, Lithium Heparin tube 4 mL
Turnaround time Run daily