Phosphorus, Urine

Also known as: UPHOS

Clinical Use

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

Not provided.

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.

Test Details

FDA Approved

New York Approved

Methodology

Automated Analyzer (Clinical Chemistry)

Biomarkers

Creatinine, Urine

Analyte

Creatinine, Urine - per volume

Concentration / Level • Quantitative (Continuous) (e.g., copies/mL, % expression)

Creatinine, Urine - per 24h

Concentration / Level • Quantitative (Continuous) (e.g., copies/mL, % expression)

Phosphorus, Urine

Analyte

Phosphorus, Urine - per volume

Concentration / Level • Quantitative (Continuous) (e.g., copies/mL, % expression)

Phosphorus, Urine - per 24h

Concentration / Level • Quantitative (Continuous) (e.g., copies/mL, % expression)

Phosphorus/Creatinine Ratio, Urine

Other • Quantitative (Continuous) (e.g., copies/mL, % expression)

LOINC Codes

Order Codes

35674-1 - Creat ?Tm Ur-mCnc
2162-6 - Creat 24h Ur-mRate
35673-3 - Phosphate ?Tm Ur-mCnc
2779-7 - Phosphate 24h Ur-mRate
13795-0 - Phosphate/Creat 24h Ur
19153-6 - Specimen vol ?Tm Ur
30211-7 - Specimen collect Time Spec

Result Turnaround Time

1 day

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.