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HelpTest Code LAB4152 OSMOLALITY, URINE
Specimen Type
Preferred Specimen: Transparent Red Top Tube
Alternative Specimen: Yellow Urine Tube, Sterile Container
Collection Instructions
Collect a random urine specimen.
Specimen Volume
10 mL
Minimum Volume
1 mL
Turnaround Time
STAT: 1 hour
Routine: 4 hours
Test Schedule
Daily
Sample Stability
Refrigerated: 7 days
Specimen Processing
Micro-samples are more susceptible to contamination and evaporation that larger samples. Avoid leaving sample containers (small or large) open dureing testing. Always cap immediately after sampling.
Cold samples are susceptible to condensation; warmer samples are susceptable to evaporation. Make sure body fluid is at room temperature prior to testing.
Method
Freezing Point
Reference Ranges
Osmolality, Urine: mOsm/kg 300-800
Measuring Range: 0-2000 mOsm/kg H20
Reporting Range: 0-2000 mOsm/kg H20
Test Components
Osmolality, Urine, mOsm/kg.
CPT Codes
83935
Rejection Criteria
Room temperature. Any urine contaminated with fecal material or meconium.