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Osmolality, Serum
Test Code677
CPT Codes
83930
Preferred Specimen
1 mL serum
Minimum Volume
0.5 mL
Transport Temperature
Room temperature
Specimen Stability
Room temperature: 4 days
Refrigerated: 5 days
Frozen: 14 days
Refrigerated: 5 days
Frozen: 14 days
Reject Criteria (Eg, hemolysis? Lipemia? Thaw/Other?)
Gross hemolysis • Grossly lipemic • Grossly icteric • Heparinized plasma
Methodology
Freezing Point Depression
Setup Schedule
Night Sets up 3 days a week.
Clinical Significance
For the evaluation of fluid and electrolyte balance.