Osmolality, Serum

Specimen Tube Type Transport

Non Gel Red Top

Container Whole Blood Required

7 ml whole blood in a Non Gel Red Top or 4 ml whole blood in Gel Green top

Critical Value

Male/Female and all ages the same: <250 mOsm/kg or >330 mOsm/KG

Summary Test Name

Osmolality, Serum

Transport Time

Should be received in lab within 1 hour of collection

Specimen Preparation Outreach

Spin within 4 hours of collection, separate serum into plastic 12 X 75 pour-off tube. Cap with red plastic stopper. Refrigerate until courier pickup.

Specimen Stability

1 week if refrigerated

Minimum Volume

.7 ml whole blood in (2) Non Gel Red microtainers or 0.4 ml whole blood in a Gel Green microtainer

Specimen Transport

Refrigerate

Specimen Preparation In House

Spin/separate and refrigerate until analysis

Stat Availability

24 hours a day, seven days a week

Test Turnaround Time Routines And Stats

R 4 hours S 2 hours

Reference Value

Male/Female and all ages the same: 275 - 295 mOsm,/kg

Additional Test Information

Serum or plasma