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Phosphate, Random Urine without Creatinine
Test Code14579
CPT Codes
84105
Preferred Specimen
10 mL of a random urine, pH adjusted, collected in a plastic leak-proof container
Minimum Volume
2 mL
Other Acceptable Specimens
Random urine collected in a urinalysis transport tube (yellow-top, blue fill line, preservative) tube or unpreserved urine collected in a plastic leak-proof container
Instructions
Adjust pH to <3.0 with 6N HCl prior to aliquoting 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 moths
Unpreserved
Room temperature: 48 hours
Refrigerated: 7 days
Frozen: 28 days
Room temperature: 6 months
Refrigerated: 6 months
Frozen: 6 moths
Unpreserved
Room temperature: 48 hours
Refrigerated: 7 days
Frozen: 28 days
Methodology
Spectrophotometry (SP)
Setup Schedule
Set up: Daily; Report available: Next day
Reference Range
Not established
Clinical Significance
Phosphorus is present in many foods with a mean intake of approximately 1500 mg per day for adult males and about 1000 mg per day for adult females. Absorbed phosphate, under the influence of parathyroid hormone is readily excreted in the kidney. Measurement of urinary phosphorus generally reflects dietary intake hence day to day excretion may show considerable variation.
