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Test Code LAB4152 OSMOLALITY, URINE

Specimen Type

Preferred Specimen: Transparent Red Top Tube
Alternative Specimen: Yellow Urine Tube, Sterile Container

Specimen Volume

10 mL

Minimum Volume

0.5 mL

Turnaround Time

STAT: 1 hour
Routine: 4 hours

Test Schedule

Daily

Sample Stability

24 hours Refrigerated or Room Temperature

Method

Freezing Point

Reference Ranges

Osmolality, Urine: 50-1200 mOsm/kg

Reporting Range: 0-2000 mOsm/kg H20

 

CPT Codes

83935

Test Components

Osmolality, Urine, mOsm/kg.

Collection Instructions

Collect a random urine specimen.

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.

Rejection Criteria

 Any urine contaminated with fecal material or meconium.