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Phosphorus, Urine, Random

Mnemonic

U PHOS R

Synonym

Urine Phosphorus - Inorganic Phosphorus (Pi) - Phosphate (PO4)

Specimen Collection Requirements

Collect

Urine, one sterile container without preservatives

Handling

Remove particulates by centrifugation prior to analysis.

Preferred Volume

2.0 mL urine

Minimum Volume

0.5 mL urine

Transport

Refrigerated (2-8°C)

Rejection Criteria

Samples collected using cotton balls.

Stability

Room Temperature (18-26°C): 7 days; Refrigerated (2-8°C): 7 days; Frozen (≤-20°C): 7 days

Testing Information

Performed

7 days/week

Reported

24 hours

Method

Colorimetry

Reference Values

Reference Values

Not Established

Comments

There is a diurnal variation in urine phosphate excretion with the highest output occurring in the afternoon

 

Eltrombopag and its metabolites may interfere with this assay causing erroneously high patient results.

CPT Codes

84105

Last Updated: Wednesday, February 3, 2021 12:52:27 AM


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