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HelpTest Code LAB2327 Uric Acid, Urine Random
Clinical System Name
Urine Uric Acid
Synonyms
Uric acid
URIC U
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.
Stability
| Specimen Type | Temperature | Time |
|---|---|---|
| Urine | Room temp |
3 d |
| Refrigerated |
14 d |
|
| Frozen |
14 d |
Availability
| STAT | Performed | TAT |
|---|---|---|
| N | M - F, day shift | 1 -3 d |
Performing Laboratory
Seattle Children's Laboratory
Department
Department: Chemistry
Location: Chem East
Phone Number: 206-987-2617
CPT Codes
84560
Methodology
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