| Test Name: |
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Phosphate, Urine, 24 Hour
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| Test Code(s): |
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UPO4 / HCUPO4
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| CPT Code(s): |
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84105
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| Methodology: |
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Phosphomolybdate, UV
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| Days Performed: |
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Daily, 24 hours.
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| Turnaround Time: |
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Stat: 2 hours.
Routine: 4 hours.
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Specimen Requirements
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| Specimen: |
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24 hour timed urine
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| Collection Instructions: |
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Timed urine collection accepted. No preservative necessary. For timed urine collections, collect all urine in container provided. Add "Refrigerate" sticker to 24-hour container.
For 24-hour urine test the collection period must be within 22-26 hours. Collection period starts after first void of the period. It is very important to refrigerate specimen during and after the collection. Indicate the date and time collection started and date and time collection finished. If questions about collection process or container does not have instructions attached, call (608) 263-7060 for assistance.
Patient instructions available at www.uwhealth.org. Search for 24-hour urine collection or UWH#4339.
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| Collection Container: |
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Preferred: 24 hour urine container
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| Collection Volume: |
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Preferred: Entire collection
Pediatrics: Entire collection
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| Sample Analyzed: |
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Urine aliquot
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| Volume Required: |
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Preferred: 1 mL
Pediatrics: 0.2 mL
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| Specimen Transport: |
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Transport entire specimen to UWHC Core Laboratory (B4/220) at close of collection. Transport with coolant pack if coming from outreach location.
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| Outreach Specimen Transport: |
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Mix urine well and note volume and period. Acidify with 6 N HCl to a pH of 2-3. A pH lower than 2 may cause assay interference. Mix well and let stand for one hour. Recheck pH. Transport 50 mL acidified aliquot with coolant pack to UWHC Core Laboratory (B4/220) along with volume and period information.
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| Stability: |
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Ambient: 5 days
Refrigerated: 5 days
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Interpretation
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Reference Interval:
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Age 18 years and up: 0.4-1.3 g/24 hour
Results calculated only for collections of 22-26 hours.
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