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Test Code URUR (timed), RUR (random) Uric Acid, Urine

Specimen Type

Urine, timed (24 hour) or random collection

Container/Tube

Urine,random or timed 24 hour

Preferred Volume

4 mL

UCMC Collection Instructions

Collect without additives.  Sample may be random or
timed
collection. 
If collection duration is not specified, specimen will be
considered a random sample.

Offsite Collection Instructions

  • Collect without additives.  Sample may be random or
    timed
    collection. Do not refrigerate.
  • Indicate start date/time and end date/time of 24 hour
    collection.
  • For timed specimens, send 10 mL of a well mixed sample.
    Indicate start and end time and total volume.
  • If collection duration is not specified, specimen will be
    considered a random sample.

Specimen Minimum Volume

2 mL

Reference Values

timed: 250 – 750 mg/24 hour
 

random: Reference ranges for random urine specimens have not
been established; subject to ordering physician interpretation
only.

DAY(S) AND TIME(S) PERFORMED

Random specimen: Sunday through Saturday 24/7; Timed
specimen:
Monday through Friday, 7:00 a.m. to 3:00 p.m.

CPT

URUR: 84560

RUR: 84560

Test Usage

Useful in the assessment and management of patients with
kidney
stones, particularly uric acid stones

Turnaround Time

Random specimen: 4 hours; Timed specimen: 24 – 72
hours

Critical Results

None

STAT DAY(S) AND TIME(S) PERFORMED

Not Available

Fee Code

URUR: 43446

RUR: 43446

Test Limitations

High homogentisic acid concentrations in urine samples lead
to
false results.

Test Includes

quantitative determination of uric acid in urine