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Test Code UURC Uric Acid, Urine, Random, LAB

Performing Laboratory

St. Luke's Hospital Cedar Rapids

Specimen Requirements

Container/Tube:

Preferred: Random urine specimen

Specimen Volume: A minimum volume of 2.3 µL plus a dead volume from a random urine collection

Collection: To prevent ureate precipitation in urine samples, add sodium hydroxide to keep urine alkaline (pH >8.0). To achieve stated uric acid stability, add NaOH prior to sample collection for 24-hour collections.  Urine samples with no NaOH do not need a measured pH before testing. Urine samples are diluted 1 + 10 with distilled/deionized water or 0.9 % NaCl. This dilution is considered in the calculation of the results. If stabilizers are added to the sample, the sample index feature must not be used. Urine specimens should be run as soon as possible and not refrigerated.  A minimum volume of 2.3 µL plus a dead volume is required for testing. Samples should be centrifuged before preforming the assay.

 

Reference Values

1st Morning specimen

37 – 92 mg/dL

Day(s) Test Set Up

Monday through Sunday

Useful For

Urine uric acid increases are associated with end stage renal disease, renal tubular defects and nephrolithiasis.

Methodology

Uricase Enzymatic colorimetric test

Note: A 24-hour urine collection is the preferred specimen see, #UURC24 Uric Acid, 24 Hour, Urine.

Test Classification and CPT Coding

84560

Report Available

Within 1 hour of receipt