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Vanderbilt Pathology Laboratory Services

Test Directory



PHOSPHORUS 24 HR URINE (TPU)

Department: Chemistry
Test Synonym(s): TPU
CPT Codes: 84105
Methodology: Phosphomolybdate
Reference Range: 0-150yrs: 400-1300 mg/day
Tube Type: 24 hour urine container - plain
Specimen: 24 hour urine-total 24 hour collection
Alternate Specimen: Red top - 5 mL
Volume: 50 mL urine
Minimum Volume: 15 mL urine
Temperature: See Special Instructions.
Stability: 2 days at pH<5 at 20-25oC
Reasons for Rejection: Should be collected in 6mol/L HCL, 20-30 mL for a 24hr specimen, to aviod precipitation of phosphate complexes
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.

Click here to print the 24 Hour Urine Collection Guide.

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