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Vanderbilt Pathology Laboratory Services

Test Directory



OSMOLALITY URINE TIMED (TOU)

Department: Chemistry
Test Synonym(s): TOU
CPT Codes: 83935
Methodology: Freeze Point
Reference Range: 300 - 1100 MOSM/KG H20
Tube Type: 24 HR urine container with 1 mL HCL
Specimen: 24 hour urine-total 24 hour collection
Volume: 50 mL urine
Minimum Volume: 15 mL urine
Temperature: See Special Instructions
Days Performed: Daily
Times Performed: Continuous
Special Instructions: Refrigerate during collection - label with beginning and ending collection times and dates - indicate total volume if an aliquot is sent. Mix specimen well before aliquoting.

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