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Test Compendium

Test Name

  • OSMOLALITY

Test Code

  • 2048

Test Synonym

  • Osmolality, Serum

Minimum Volume

  • 2 mL

Specimen Type

  • Serum Or Plasma

Primary Container

  • Serum Separator Tube, Plain Red Top Tube, Green Top Tube, Transfer Tube- Serum, Transfer Tube- Plasma

Transport Temp

  • Refrigerated

TAT

  • 3 days

Specimen Requirements

  • 2 mL serum from an SST or Red Top tube, Heparinized plasma from green

Specimen Retention

  • Serum from an SST or Red Top Tube. Separate serum from cells as soon as possible after clot formation. Plasma from a Green Top is acceptable Transfer heparized plasma or red top serum to plastic transport tube.