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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.
Secondary ID
609449Useful For
Assessing renal tubular injury or dysfunction
Screening for other tubular abnormalities
Detecting chronic asymptomatic renal tubular dysfunction.(2)
Special Instructions
Specimen Type
UrineSpecimen Stability Information
| Specimen Type | Temperature | Time |
|---|---|---|
| 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 daysPerforming Laboratory
Mayo Clinic Laboratories in Rochester
CPT Code Information
83883
Forms
If not ordering electronically, complete, print, and send a Renal Diagnostics Test Request (T830) with the specimen.