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PHOSPHORUS, URINE, TIMED

Mnemonic

U PHOS T

Synonym

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

Includes

Urine Phosphorus, Urine Phosphorus/Day

Specimen Collection Requirements

Collect

Preferred: 24 hour urine without preservatives, refrigerate during collection. Also acceptable: Other timed urine collections.

Handling

Collect urine over 24 hours. Refrigerate during collection. Mix urine well before removing aliquot. Record collection time interval and total volume on transport tube and test requistion or order.

Preferred Volume

2.0 mL urine

Minimum Volume

0.5 mL urine

Transport

Refrigerated (2-8°C)

Stability

Ambient (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

400-1300 mg/day

Comments

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

CPT Codes

84105

Last Updated: Thursday, January 5, 2017 03:41:30 AM


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