Phosphorus, Urine

Casandra

Casandra Test Code AR64445Version 1 (DRAFT)

Performing Lab

Lab ARUP LaboratoriesLab Test ID 0020478CPT Code 84105

Also known as: UPHOS

Clinical Use

Order Test

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.

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
2162-6
35673-3
2779-7
13795-0
19153-6
30211-7

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.