Test directory: Osmolality

Ordering Code463
Test NameOsmolality
AliasSerum Osmolality
Preferred SpecimenPlasma
Preferred ContainerLithium Heparin PST (Green)
Other Specimen/ContainerPlasma in Lithium Heparin (Green), Serum in Plain (Red),
Serum in SST (Gold)
Optimum Volume2 mL
Handling InstructionsCentrifuge & aliquot specimen immediately.
Transport RequirementsOahu: Refrigerated
Airline: Refrigerated
Specimen StabilityAmbient: 48 Hours
Refrigerated: 1 Week
Rejection CriteriaContaminated, Insufficient quantity, Specimen older than stability limits
Avail. StatYES
Analytic Time1 Day
MethodologyFreezing point depression

Reference range(s)

ComponentAgeMale NormMale Critical LowMale Critical HighFemale NormFemale Critical HighFemale Critical LowUnitsAdd'l info
OsmolalityALL280-300280-300mOsm/kg