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HelpTest ID RB24 Retinol-Binding Protein, 24 Hour, Urine
Necessary Information
24-hour volume (in milliliters) is required.
Specimen Required
Container/Tube: Plastic, 5-mL tube
Specimen Volume: 5 mL
Collection Instructions:
1. Collect urine for 24 hours.
2. No preservative.
3. Mix well before taking 5-mL aliquot.
Additional Information:
See Urine Preservatives-Collection and Transportation for 24-Hour Urine Specimens for multiple collections.
Reporting Name
Retinol-Binding Protein, 24-Hour, USpecimen Type
UrineSpecimen Stability Information
| Specimen Type | Temperature | Time |
|---|---|---|
| Urine | Refrigerated (preferred) | 7 days |
| Frozen | 7 days |
Report Available
1 to 4 daysPerforming Laboratory
Mayo Clinic Laboratories in Rochester
LOINC Code Information
| Test ID | Test Order Name | Order LOINC Value |
|---|---|---|
| RB24 | Retinol-Binding Protein, 24-Hour, U | 96399-1 |
| Result ID | Test Result Name | Result LOINC Value |
|---|---|---|
| CR_A | Creatinine, 24 HR, U | 2162-6 |
| RBP1 | Retinol-Binding Protein, 24-Hour, U | 18362-4 |
| RBPCN | Retinol-Binding Protein Conc | 96406-4 |
| TM27 | Collection Duration (h) | 13362-9 |
| VL69 | Urine Volume (mL) | 3167-4 |
| CR_24 | Creatinine Concentration, 24 HR, U | 20624-3 |
Forms
If not ordering electronically, complete, print, and send a Renal Diagnostics Test Request (T830) with the specimen.
Useful For
Assessing renal tubular injury or dysfunction
Screening for other tubular abnormalities
Detecting chronic asymptomatic renal tubular dysfunction.(2)
Day(s) Performed
Monday, Wednesday, Friday
Test Classification
This test was developed and its performance characteristics determined by Mayo Clinic in a manner consistent with CLIA requirements. It has not been cleared or approved by the US Food and Drug Administration.CPT Code Information
83883
Specimen Minimum Volume
1 mL
Reference Values
Retinol-Binding Protein:
≥18 years of age: <273 mcg/24 hour
Reference values have not been established for patients who are less than 18 years.
Creatinine:
Males ≥18: 930-2955 mg/24 hours
Females ≥18: 603-1783 mg/24 hours
Reference values have not been established for patients who are less than 18 years.
Method Name
RBP1: Calculation
RBPCN: Immunonephelometry
CRT24: Enzymatic Colorimetric Assay
Profile Information
| Test ID | Reporting Name | Available Separately | Always Performed |
|---|---|---|---|
| RBP1 | Retinol-Binding Protein, 24-Hour, U | No | Yes |
| RBPCN | Retinol-Binding Protein Conc | No | Yes |
| CRT24 | Creatinine, 24 HR, U | Yes, (order CTU) | Yes |