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 |
| 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 |