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Phosphate, Pediatric Urine with Creatinine [11215X]
Test Code112158
CPT Codes
82570, 84105
Preferred Specimen
2 mL of a 2nd morning voided urine, collected in a plastic urine container
Minimum Volume
0.5 mL
Other Acceptable Specimens
Unpreserved urine collected in urinalysis transport tube (yellow-top, blue fill line, preservative tube) • Preserved urine with 6N HCl acid submitted in a plastic, urine container
Instructions
Adjust pH to <3.0 with 6N HCl prior to aliquoting for phosphate testing.
Please note: Reference range is based on second A.M. voided specimen
Please note: Reference range is based on second A.M. voided specimen
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
Set up: Daily; Report available: 1 day
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.
Performing Laboratory
Quest Diagnostics Nichols Institute
14225 Newbrook Drive
Chantilly, VA 20153
