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OSMOLALITY, URINE
MessageChemistry
Test Code
LAB420
CPT Codes
83935
Preferred Specimen
Urine specimen
Minimum Volume
Urine: 20 uL
Other Acceptable Specimens
Urine Cup/Red Top Tube
Instructions
Mix well and transfer 5 mL aliquot into plastic tube. Centrifuge urine specimen following collection. Can be refrigerated at 2 to 8°C or stored in room temperature for up to 24 hours. These specimens should be tested immediately or up to 24 hours of collection.
Transport Container
Urine Cup/Red Top Tube
Specimen Stability
Refrigerated: 24 hours
​Room temperature: 24 hours
​Room temperature: 24 hours
Reject Criteria (Eg, hemolysis? Lipemia? Thaw/Other?)
Noncompliant samples per specimen labeling, requirements, mislabeled samples, suspect contamination, and/or storage
Methodology
Freezing-Point Thermodynamics
FDA Status
Approved
Report Available
Same day
Reference Range
50 - 1200 MOSM/KG
Performing Laboratory
Hoag Newport/ Hoag Irvine
