Carboxyhaemoglobin, Blood
Tests:Caboxyhaemoglobin, Blood
Overview | |
|---|---|
| Department | Biochemistry |
| Test Code | |
| Synonyms | CoHb
Carbon Monoxide FCOHb |
| Availability | Monday - Sunday, testing routinely available out of hours |
| Turnaround Time | 30min - 1 hour |
| Stability - Test add | Samples collected into a full Green top tube are stable for several days |
Specimen Requirements | |
| Specimen | Whole blood |
| Preferred | Minimum 1 mL in blood gas syringe |
| Acceptable | Full 4 mL Green-Top tube collected anaerobically, Mix well |
| Unacceptable | Clotted blood
Serum Plasma |
| Specimen Transportation | Blood gas syringes must be transported immediately and processed within 30 minutes. |
| Paediatric Requirements | 0.2 mL in blood gas capillary |
Aliquot Requirements | |
| Sample | heparinised blood - DO NOT OPEN. |
| Preferred Volume | 4 mL |
| Minimum Volume | |
| Aliquot Transportation | |
Clinical Information | |
| Reference Intervals | Non-smokers: <1.5%
Smokers: <9% |
| Test Method | Co-oximetry on Radiometer ABL90 FLEX blood gas analyser |
| Advanced Notice | Not required |
| Patient Preparation | Not required |
Comments | |
| Heparin tube of blood must be as full as possible.
Do not open the tube. | |
| Owner | Clair Crossley (Crossley1) |
|---|---|
| Last reviewed | 14.09.2026 |
| Next review | 14.09.2027 (OK) |