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Test Code RPTU1 Protein/Creatinine Ratio, Random, Urine


Specimen Required


Patient Preparation: Specimens should be collected before fluorescein is given or not collected until at least 24 hour later.

Supplies: Sarstedt Aliquot Tube, 5 mL (T914)

Container/Tube: Plastic vial

Specimen Volume: 4 mL

Collection Instructions:

1. Collect a random urine specimen.

2. No preservative.

3. Invert well before taking 4 mL aliquot.

4. Do not over fill aliquot tube, 4 mL at most.


Useful For

Evaluation of renal disease

 

Screening for monoclonal gammopathy

Profile Information

Test ID Reporting Name Available Separately Always Performed
PTCON Protein, Total, Random, U No Yes
RATO3 Protein/Creatinine Ratio No Yes
CRETR Creatinine, Random, U No Yes

Method Name

PTCON: Turbidimetry

CRETR: Enzymatic Colorimetric Assay

RATO3: Calculation

Reporting Name

Protein/Creatinine Ratio, Random, U

Specimen Type

Urine

Specimen Minimum Volume

1 mL

Specimen Stability Information

Specimen Type Temperature Time Special Container
Urine Refrigerated (preferred) 14 days
  Frozen  30 days
  Ambient  24 hours

Reject Due To

All specimens will be evaluated at Mayo Clinic Laboratories for test suitability.

Reference Values

≥18 years: <0.18 mg/mg creatinine

Reference values have not been established for patients younger than 18 years of age.

Performing Laboratory

MCHS- Mankato

Test Classification

This test has been cleared, approved, or is exempt by the US Food and Drug Administration and is used per manufacturer's instructions. Performance characteristics were verified by Mayo Clinic in a manner consistent with CLIA requirements.

CPT Code Information

84156

82570

LOINC Code Information

Test ID Test Order Name Order LOINC Value
RPTU1 Protein/Creatinine Ratio, Random, U 87434-7

 

Result ID Test Result Name Result LOINC Value
PTCON Protein, Total, Random, U 2888-6
CRETR Creatinine, Random, U 2161-8
RATO3 Protein/Creatinine Ratio 2890-2

Day(s) Performed

Monday through Sunday

Report Available

Same day/1 day

Forms

If not ordering electronically, complete, print, and send a Renal Diagnostics Test Request (T830) with the specimen.