Phosphorus, Urine
Also known as: UPHOS
Use
This test measures the phosphorus concentration in urine, which can be significant for diagnosing and monitoring conditions associated with abnormal phosphorus levels such as nephrolithiasis (kidney stones), bone diseases, and other metabolic disorders. Evaluating phosphorus excretion in urine can provide insights into kidney function and the body's phosphate handling, assisting in the diagnostic assessment of potential underlying conditions.
Special Instructions
For optimal test results, ensure proper collection of 24-hour urine and follow pH adjustment instructions precisely. Note any deviations in collection time or volume, as these can affect test result interpretation.
Limitations
The test is dependent on accurate urine collection over a 24-hour period. Inaccuracies in recording collection time or volume may result in misleading interpretations. High or inadequate pH levels beyond the recommended range may compromise the integrity of test results. It is crucial to adhere to specimen preparation and storage protocols to ensure validity.
FDA ApprovedNew York Approved
Methodology
Automated Analyzer (Clinical Chemistry)
Biomarkers
LOINC Codes
- 35674-1
- 2162-6
- 35673-3
- 2779-7
- 13795-0
- 19153-6
- 30211-7
Result Turnaround Time
1 day
Related Documents
For more information, please review the documents below
Specimen
Urine
Volume
3 mL
Minimum Volume
0.5 mL
Container
ARUP Standard Transport Tube
Collection Instructions
Collect 24-hour urine. Refrigerate specimen during collection. Mix entire collection, adjust pH to 1.5-2.0 by adding 6M HCl in 1 mL increments, and record total volume, collection time interval, and pH on transport tube and test request form.
Storage Instructions
Frozen.
Stability Requirements
| Temperature | Period |
|---|---|
| Room Temperature | 24 hours |
| Refrigerated | 2 weeks |
| Frozen | 1 month |