Osmolality, Blood
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Overview | |
|---|---|
| Department | Biochemistry |
| Test Code | OSM |
| Synonyms | Osmol |
| Availability | Monday - Sunday, testing routinely available out of hours |
| Turnaround Time | 1 – 6hrs |
| Stability – Add test | |
Specimen Requirements | |
| Specimen | Serum
Plasma |
| Preferred | Li-Heparin Green-Top tube |
| Acceptable | Yellow-Top or Red-Top tube |
| Unacceptable | Grossly haemolysed samples |
| Specimen Transportation | |
| Paediatric Requirements | 600 µl Li-Hep Green Microtainer |
Aliquot Requirements | |
| Sample | Plasma or Serum |
| Preferred Volume | 0.3 mL |
| Minimum Volume | |
| Aliquot Transportation | |
Clinical Information | |
| Reference Intervals | 280 - 300 mmol/kg |
| Test Method | Freezing point depression, using 3320 Advanced Osmometer |
| Advanced Notice | Not required |
| Patient Preparation | Not required |
Comments | |
| Haemolysis will cause unreliable results.
Osmolar Gap: An osmolar gap can be calculated on request, please contact the laboratory if required. | |