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Osmolality, 24h Urine
Alternative Names/Synonyms
n/a
Laboratory
Core Laboratory & Transfusion Medicine
Sub-section
Biochemistry
Specimen Type
Urine
Test Code
OSMU
Clinical Significance (If applicable)
Assisting in the diagnosis and monitoring of electrolyte and/or water balance disorders.
Specimen Requirements (Sample Type)
Urine
Specimen Requirements (Volume (mL))
5 mL
Specimen Requirements (Tube Type)
24h Urine Collection Container (No Additive)
Collection Requirements
Collection Instructions
Cause for Rejection
Specimen Acceptability and Transport Guidance
Instrument, Methodology
Osmo1 Osmometer, freezing point depression
Test Availability
24 hours a day, 7 days a week
Routine Turnaround Time
3 hours
Reference Ranges
None - urine osmolality should always be interpreted in context of serum/plasma osmolality.
Laboratory Contact Information
416-586-4800 extension 4688
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