Test Code 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.
Useful For
Assessing renal tubular injury or dysfunction
Screening for other tubular abnormalities
Detecting chronic asymptomatic renal tubular dysfunction.(2)
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 |
Special Instructions
Reporting Name
Retinol-Binding Protein, 24-Hour, USpecimen Type
UrineSpecimen Minimum Volume
1 mL
Specimen Stability Information
Specimen Type | Temperature | Time | Special Container |
---|---|---|---|
Urine | Refrigerated (preferred) | 7 days | |
Frozen | 7 days |
Reject Due To
All specimens will be evaluated at Mayo Clinic Laboratories for test suitability.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.
Day(s) Performed
Monday, Wednesday, Friday
Report Available
1 to 4 daysSpecimen Retention Time
7 daysPerforming Laboratory
Mayo Clinic Laboratories in RochesterCPT Code Information
83883
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.