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Lab Dept:
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Urine/Stool
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Test Name:
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PHOSPHORUS, TIMED URINE
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General Information
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Lab Order Codes:
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UPQ
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Synonyms:
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PO4 Quantitative Urine, P, Urine; Phosphate, Urine; Phosphorus, 24 hour urine
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CPT Codes:
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84105 – Phosphorus inorganic (phosphate)
81050 – Volume measurement for timed collection
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Test Includes:
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Urine phosphorus concentrations in mg/dL and mg/collection
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Logistics
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Test Indications:
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Useful in the follow-up of abnormal calcium values, kidney disease and uncontrolled diabetes.
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Lab Testing Sections:
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Chemistry
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Phone Numbers:
Minneapolis:
Saint Paul:
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612-813-6280
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651-220-6550
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Test Availability:
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Daily, 24 hours
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Turnaround Time:
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1 day
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Special Instructions:
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Submit an entire 24-hour urine collection. No preservative. Refrigerate specimen during and after collection.
Note: Starting and ending times of collection are required for a timed urine collection and must be documented electronically or on the proper request form.
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Specimen
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Specimen Type:
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Urine, timed collection
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Container:
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Plastic leakproof container (No preservative). Urine GUARD® collection container is preferred for a timed urine sample.
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Draw Volume:
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Submit an entire 24-hour urine collection
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Processed Volume:
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Minimum: 0.5 mL urine
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Collection:
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For timed urine collections, empty the bladder, discard the voided sample, and note the start time. Collect all urine voided for the specified time period. At the end of the period, note the finishing time, add the last voided sample to the container by emptying the bladder. Bring the refrigerated container to the lab. Make sure all specimens submitted to the laboratory are properly labeled with the patient’s name, medical record number and date of birth.
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Special Processing:
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Lab Staff: Acidify the urine aliquot before analysis to a pH of 1-2 with 6N HCL.
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Patient Preparation:
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None
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Sample Rejection:
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Mislabeled or unlabeled specimens
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Interpretive
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Reference Range:
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500 - 1500 mg/collection
Note: The reference values are for 24 hour collections. Specimens collected for other than a 24 hour time period have no reference values established.
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Critical Values:
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N/A
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Limitations:
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N/A
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Methodology:
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Phosphomolybdate
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References:
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PHOS Flex® reagent cartridge insert sheet Siemens Healthcare Diagnostics, Inc. 2008-03-27 717061.001 – US, Rev L
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Jacobs & DeMott Laboratory Test Handbook (2001) Lexi-Comp, Inc, Hudson, OH, 5th Edition
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Biorad Liquichek Unassayed Chemistry Control Product Insert, Bio-Rad Laboratories, Irvine, CA 92618
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Biorad Liquichek Urine Chemistry Control Product Insert, Bio-Rad Laboratories, Irvine, CA 92618
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