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.