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Test Code UPCR or LAB743 Protein/Creatinine Ratio, Urine

Important Note

The urine albumin/creatinine ratio is more sensitive than the urine protein/creatinine ratio. Please see the December 2021 LabWire for details.

The National Kidney Foundation guidelines for the management of patients with diabetes and albuminuria recommend that all type 1 diabetic patients older than 12 years and all type 2 diabetic patients younger than 70 years have their urine tested for albuminuria yearly when they are under stable glucose control. The order Urine albumin/creatinine ratio (LAB689), is the appropriate request for this, not the Urine Protein Creatinine Ratio. 

Profile Information

Test ID

Reporting Name

Available Separately?

Always Performed?

UCRER

Creatinine, Urine, Random

Y

Y

UTPR

Total Protein, Urine, Random

Y

Y

UPCR

Protein/Creatinine, Urine, Ratio

NA

Y

Specimen Requirements

Container Type:

Sterile urine cup

 

or

 
Optimal Collection Volume: 

5 mL
Minimum Volume:

1 mL
Collection Instructions:

1. Collect a random urine specimen from the patient.

2. Ensure the lid is secured tightly before sending it to the lab.

3. Ensure that no preservatives are used.
Specimen Transport:

Refrigerate
Processing Instructions: 

1. Pour off urine into a labeled aliquot tube.

2. Centrifuge the urine aliquot.

3. Deliver the urine aliquot to the chemistry department.

Specimen Stability

Specimen Type Temperature Time
Urine Refrigerated 2 days
Room Temperature 1 day

Specimen Rejection Criteria

Quantity not sufficient

Useful For

Please see the important note section above.

Methodology

  • Urine protein - Roche Cobas: Immunoturbidimetric assay
  • Urine creatinine - Roche Cobas: Enzymatic colorimetric

Reference Ranges

Gender

 Reference Range and Reporting Units
Male < 0.11 mg/mg

Female

 < 0.16 mg/mg

Day(s) Performed

24/7

Expected TAT

Same day

Performing Laboratory

Bronson Laboratory, Chemistry - Kalamazoo, Battle Creek, Paw Paw, South Haven

Sample Retention Time

6 days

CPT Code

  • 84156: Total Protein, Random, Urine
  • 82570: Creatinine, Random, Urine

LOINC Code

  • 2888-6: Total Protein, Random, Urine
  • 2161-8: Creatinine, Random, Urine