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Test Code RPROT Urine Protein, Random

Important Note

If ordering a timed collection use order code URPR

Specimen and Container/Tube

Specimen Type: Urine, Random Collection

Preferred Specimen: Sterile Plastic Container

Other Acceptable specimens: Sterile Clean Glass Container

Specimen Stability

Storage Temperature

Stability

Room temperature

 1 day

Refrigerated

7 days

Frozen

1 month

Collection Instructions

  • Collect specimen per standard laboratory collection procedures. 
  • No preservatives or additives.

Specimen Handling and Transport Instructions

UCMC Onsite Instructions: 

  • Collect specimen per standard collection procedure and send to laboratory immediately. 
  • No preservatives or additives.

 

UCMC Offsite and UC MedLab Outreach Instructions: 

  • Samples should be centrifuged within 2 hours of collection
  • No preservatives or additives
  • Centrifuge specimens at >2500 x g for 10 minutes at room temperature.
  • Aliquot urine into plastic tube containing a minimum of 0.2 mL of specimen.
  • Urine samples must then be sent refrigerated at 2-8oC.

Rejection Criteria

  • Common specimen rejected situations include: incorrect specimen type, insufficient volume, missing or incomplete specimen identifiers, incorrect specimen transport, or specimens outside stability limits. 
  • Specimens that are collected with preservatives or additives.

Reference Values

Test

Age

Sex

Reference Range

Urine Protein

All

All

N/A

Critical Values

Not applicable 

Turnaround Time

Turnaround times are relative to the time the specimen is received in the test laboratory. 

STAT Turnaround Time: 1 hour

Routine Turnaround Time: 4 hours

Testing Schedule: 24/7

Clinical Indications

Protein measurements in urine may be used in the diagnosis and treatment of disease conditions such as renal or heart diseases, or thyroid disorders, which are characterized by proteinuria or albuminuria. If the Urine Protein/Urine Creatinine ratio is needed please order test code RPRCR.

Test Components

Urine Phosphorus

CPT Codes

84156

LOINC Codes

TBD

Methodology

Turbidimetric (Benzethonium Chloride) Method (Roche Diagnostics)

Synonyms/Keyword Search

Not applicable 

Additional Information

  • Results should always be assessed in conjunction with patient's medical history, clinical examination and other findings.
  • Reference ranges for random urine specimens have not been established; subject to ordering physician interpretation only.
  • Therapeutic concentrations of Ca-dobesilate, levodopa and phenazopyridine interfere with the assay. Radiopaque media containing organically bound iodine (e.g. Hexabrix) may cause false-high results. The administration of gelatin-based plasma replacements can lead to increased urine protein values. High homogentisic acid concentrations in urine samples lead to false results. Hemoglobin from hemolyzed red cells will interfere with the assay.

Last Review Date

4/3/2025

Volume

Preferred Volume: 0.5 mL

Minimum Volume: 0.2 mL