Home
HelpTest ID 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, USpecimen Type
UrineSpecimen Minimum Volume
1 mL
Specimen Stability Information
| Specimen Type | Temperature | Time | Special Container |
|---|---|---|---|
| Urine | Refrigerated (preferred) | 14 days | |
| Frozen | 30 days | ||
| Ambient | 24 hours |
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
Mayo Clinic Laboratories in Rochester
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 dayForms
If not ordering electronically, complete, print, and send a Renal Diagnostics Test Request (T830) with the specimen.