ARUP's Laboratory Test Directory

Osmolality, Urine : 0020228

Mnemonic: UOSMO

Methodology: Freezing Point
Performed: Sun-Sat
Reported: Within 24 hours
Specimen Required: Collect: Random urine.

Specimen Preparation: Transfer 1 mL aliquot from a well-mixed random urine to an ARUP Standard Transport Tube. (Min: 0.5 mL)

Storage/Transport Temperature: Frozen.

Unacceptable Conditions: Urine collected with preservatives.

Stability (collection to initiation of testing): Ambient: 24 hours; Refrigerated: 1 week; Frozen: 6 months
Reference Interval:
0-30 days: 50-645 mOsm/kg
1 month-16 years: 50-1500 mOsm/kg
17 years and older: 50-800 mOsm/kg
CPT Code(s): 83935