Clinics and Departments

Laboratory Services

Lab Dept:

Chemistry

Test Name:

URIC ACID

General Information

Lab Order Codes:

URIC

Synonyms:

Uric Acid

CPT Codes:

84550 – Uric acid; blood

Test Includes:

Uric acid concentration reported in mg/dL.

Logistics

Test Indications:

Uric acid is the end product of purine metabolism, either synthesized or dietary, and is normally cleared by the kidney. An increased level in joints is known as gout. Uric acid may also be increased with acidosis, uremia, and in conditions associated with tissue destruction, such as leukemia.

Lab Testing Sections:

Chemistry

Phone Numbers:

MIN Lab: 612-813-6280

STP Lab: 651-220-6550

Test Availability:

Daily, 24 hours

Turnaround Time:

4 hours

Special Instructions:

None

Specimen

Specimen Type:

Blood

Container:

Green top (Li Heparin) tube preferred
Alternate tube: Red top (plain, no gel) tube

Draw Volume:

0.6 mL blood

Processed Volume:

0.2 mL plasma/serum

Collection:

Routine venipuncture. Mix tubes containing anticoagulant by gentle inversion.

Special Processing:

Lab Staff: Centrifuge specimen, remove serum/plasma aliquot into a plastic sample cup. Store at refrigerated temperatures.

Patient Preparation:

None

Sample Rejection:

Mislabeled or unlabeled specimen, specimens other than heparinized plasma or serum

Interpretive

Reference Range:

2.0 - 5.5 mg/dL

Critical Values:

>10 mg/dL

Limitations:

Uric acid concentration is decreased with excessive lipemia.

Methodology:

Uricase

References:

URCA Flex® reagent cartridge insert sheet, Siemens Healthcare Diagnostics Inc, 2009-04-01 K PN 717077.001 - US

Jacobs & DeMott Laboratory Test Handbook (2001) Lexi-Comp, Inc, Hudson, OH, 5th Edition

Tietz Textbook of Clinical Chemistry (1999) 3rd Edition, W.B. Saunders Company, pp 50-51, 1245-1250

Biorad LiquichekÔ Unassayed Chemistry Control (Human) product insert, Irvine, CA

Biorad Liquichekä Urine Chemistry Control Product insert, Bio-Rad Laboratories, Irvine, CA 92618



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