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Test Code LAB2327 Uric Acid, Urine Random

Clinical System Name

Urine Uric Acid 


Uric acid


Sample Requirements

Specimen:  Urine

Container(s): Sterile screw-capped container, Clean container also acceptable.

Preferred Vol: 5 mL

Minimum Vol: 2 mL

Note: Timed collection is preferred.


Processing Instructions

Reject due to:  Spun sample, insufficient quantity

Spin: N

Aliquot: N

Temp: 2-8 C

Storage location: CPA refrigerator, FrigB bucket.

Off-site collection: Mix the primary container thoroughly and aliquot into a 15ml falcon tube using the appropriate aliquot label. The aliquot must be added to the transfer list for testing at main campus. Send sample refrigerated.

For questions on shared samples please call Chemistry East laboratory.




Specimen Type Temperature Time
Urine Room temp

3 d


14 d


14 d



STAT Performed TAT
N M - F, day shift 1 -3 d


Performing Laboratory

Seattle Children's Laboratory    


Department:  Chemistry

Location: Chem East

Phone Number: 206-987-2617

CPT Codes



Method:  Spectrophotometric, Rate methods by Vitros 4600

Analytical Volume:  2 mL

Reference Range


Urine Uric Acid/Creatinine Range AGE RATIO
  0-12 months <2.8
  1 year - 2 years <2.0
  3 years - 5 years <1.8
  6 years - 8 years <1.5
  9 years - 11 years <1.2
  = or > 12 years <0.8



Patients with Lesch-Nyhan typically have urine uric acid/creatinine ratio >2.0. Kaufman etal. J Pediatr. 73:583, 1968