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Test ID URCU Uric Acid, 24 Hour, Urine

Useful For

Assessment and management of patients with kidney stones, particularly uric acid stones

Method Name

Uricase

Reporting Name

Uric Acid, U

Specimen Type

Urine


Specimen Required


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

Specimen Volume: 5 mL

Collection Instructions:

1. Add 10 g of boric acid as preservative at start of collection.

2. Collect urine for 24 hours.

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) 14 days
  Frozen  14 days

Reference Values

>  or = 16 years: Diet-dependent: <750 mg/24 hours

Reference values have not been established for patients who are less than 16 years of age.

 

The reference value is for a 24-hour collection. Specimens collected for other than a 24-hour time period are reported in unit of mg/dL for which reference values are not established.

Day(s) and Time(s) Performed

Monday through Sunday; Continuously

Performing Laboratory

Mayo Clinic Laboratories in Rochester

CPT Code Information

84560

LOINC Code Information

Test ID Test Order Name Order LOINC Value
URCU Uric Acid, U 3087-4

 

Result ID Test Result Name Result LOINC Value
UACID Uric Acid, U 3087-4
TM29 Collection Duration 13362-9
VL27 Urine Volume 3167-4
UACN1 Uric Acid Concentration 21587-1

Test Classification

This test has been modified from the manufacturer's instructions. Its performance characteristics were 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.

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

No

Refrigerate

Yes

Frozen

Yes

50% Acetic Acid

No

Boric Acid

Preferred

Diazolidinyl Urea

Yes

6M Hydrochloric Acid

No

6M Nitric Acid

No

Sodium Carbonate

Yes

Thymol

Yes

Toluene

No