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Test Code RBP24 Retinol-Binding Protein, 24 Hour, Urine


Necessary Information


24-Hour volume is required.



Specimen Required


Container/Tube: Plastic, 5-mL tube (T465)

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 in Special Instructions for multiple collections.


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)

Method Name

Immunonephelometry

Reporting Name

Retinol-Binding Protein, 24-Hour, U

Specimen Type

Urine

Specimen Minimum Volume

1 mL

Specimen Stability Information

Specimen Type Temperature Time Special Container
Urine Refrigerated (preferred) 7 days
  Frozen  7 days

Reference Values

<163 mcg/24 hours

Day(s) and Time(s) Performed

Varies; 8 a.m. to 4 p.m.

Performing Laboratory

Mayo Clinic Laboratories in Rochester

Test Classification

This test was developed and its performance characteristics determined by Mayo Clinic in a manner consistent with CLIA requirements. This test has not been cleared or approved by the U.S. Food and Drug Administration.

CPT Code Information

83883

LOINC Code Information

Test ID Test Order Name Order LOINC Value
RBP24 Retinol-Binding Protein, 24-Hour, U In Process

 

Result ID Test Result Name Result LOINC Value
RBP1 Retinol-Binding Protein, 24-Hour, U 18362-4
RBPC1 RBP/Creat Ratio In Process
DUR6 Collection Duration 13362-9
VL59 Urine Volume 3167-4
RBPCN Retinol-Binding Protein Conc 33782-4
CRCN Creatinine Concentration 20624-3

Urine Preservative Collection Options

Note: The addition of preservative or application of temperature controls must occur within 4 hours of completion of the collection.

Ambient

Preferred

Refrigerate

OK

Frozen

OK

50% Acetic Acid

No

Boric Acid

OK

Diazolidinyl Urea

No

6M Hydrochloric Acid

No

6M Nitric Acid

No

Sodium Carbonate

No

Thymol

OK

Toluene

No