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Osmolality
MessagePerforming Lab: Lakeview, Regions
Test Code
0552
Alias/See Also
Sunquest: OSMOS
CPT Codes
83930
Preferred Specimen
0.5 mL Lithium Heparin Plasma (light green-top) tube
Minimum Volume
0.3 mL
Other Acceptable Specimens
Serum (gold-top, red-top, red/gray-top), Lithium Heparin (light green-top) on ICE
Transport Temperature
Refrigerated
Specimen Stability
Room Temperature: 1 days
Refrigerated: 2 days
Frozen: Not Recommended
Refrigerated: 2 days
Frozen: Not Recommended
Methodology
Freezing Point Thermodynamics
Setup Schedule
Daily
Report Available
Same day.
Reference Range
Female: 275 - 295 mOsm/kg
Male: 280 - 300 mOsm/kg
Male: 280 - 300 mOsm/kg
Clinical Significance
Used for the detection of unmeasured substances in plasma or as an assessment of the concentrating ability of the kidney. Serum is also often used to monitor hyperalimentation administration as well as mannitol therapy on neurology patients.
