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Laboratory Medicine

Test catalogue

Osmolality, Urine Random

Test Name

Osmolality, Urine Random

Urine sample Specimen Type / Requirements

Container Type = Sterile Container

Minimum Volume = 5ml Urine

Specimen Handling

Collection Instructions: Random urine collected in red top vacutainer or sterile urine container, Ensure both sample and requisition are labelled properly.

Write your initials, date and time of collection on the collection label.

Stability:Stable for 1 week at 2-8°C..

Transportation:Transport at room temperature ASAP.

Laboratory Staff Instructions: No aliquoting is necessary for urine Osmolality. Samples are analyzed by the gas bench.

Sample Rejection Criteria: Unlabeled, leaking and/or Non sufficient quantity (Not Sufficient Quantity) will be rejected.

Required Documentation

Turnaround Time (TAT)

45 Mins for Trauma / Stat - 2 hours for routine

Test Utilization


Reference Value

Urine 50 – 1200 mOsm/kg

Test Code



Freezing-point depression osmometry

Testing Location


Other Information

Last Updated: February 10, 2020