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Phosphate, Pediatric Urine with Creatinine
Test Code11215
Preferred Specimen
SECOND MORNING VOIDED URINE
In Sterile Cup
In Sterile Cup
Minimum Volume
0.5 mL
Other Acceptable Specimens
Unpreserved urine collected in a urinalysis transport tube (yellow-top, blue fill line, preservative tube) or preserved urine with 6N HCl acid submitted in a plastic, urine container
Instructions
Adjust pH to <3.0 with 6N HC1 prior to aliquotting for phosphate testing
Transport Temperature
Preserved: Room temperature
Unpreserved: Refrigerated (cold packs)
Unpreserved: Refrigerated (cold packs)
Specimen Stability
Preserved
Room temperature: 6 months
Refrigerated: 6 months
Frozen: 6 months
Unpreserved
Room temperature: 48 hours
Refrigerated: 7 days
Frozen: 28 days
Room temperature: 6 months
Refrigerated: 6 months
Frozen: 6 months
Unpreserved
Room temperature: 48 hours
Refrigerated: 7 days
Frozen: 28 days
Methodology
Spectrophotometry (SP)
Setup Schedule
P.M. Sets up 2 days a week.
Reference Range
See Laboratory Report
Clinical Significance
The urinary phosphorus concentration is useful to assess calcium and phosphorus balance. The thyroid and kidneys are key organs whose function influence urinary phosphorus concentration.
