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

Reporting Name

Retinol-Binding Protein, 24-Hour, U

Useful For

Assessing renal tubular injury or dysfunction

 

Screening for other tubular abnormalities

 

Detecting chronic asymptomatic renal tubular dysfunction(2)

Performing Laboratory

Mayo Medical Laboratories in Rochester

Specimen Type

Urine


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:

1. 24-Hour volume is required.

2. See Urine Preservatives-Collection and Transportation for 24-Hour Urine Specimens in Special Instructions for multiple collections.


Specimen Minimum Volume

1 mL

Specimen Stability Information

Specimen Type Temperature Time
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.

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 In Process
CRCN Creatinine Concentration 20624-3

Method Name

Immunonephelometry

Urine Preservative Collection Options

Ambient

Preferred

Refrigerated

Yes

Frozen

Yes

6N HCI

No

50% Acetic Acid

No

Na2CO3

No

Toluene

Yes

6N HNO3

No

Boric Acid

Yes

Thymol

Yes