Uric Acid

What it measures

• Uric AcidLOINC 3084-1

Before the visit

The assay manufacturer Beckman Coulter advises: N-Acetyl Cysteine (NAC), when administered in therapeutic concentrations (for the treatment of acetaminophen overdose), has been determined to interfere with assays for cholesterol and uric acid where "NAC interference may lead to falsely low results." According to Beckman Coulter, the NAC interference should be insignificant by 12 hours after completion of the initial loading dose of an IV infusion treatment regimen consisting of an initial loading dose of 150 mg/kg administered over 1 hour, a second dose of 50 mg/kg administered over 4 hours and a third dose of 100 mg/kg administered over 16 hours.

Specimen

Specimen

1 mL serum

Minimum volume

0.5 mL

Also accepted

Sodium heparin (green-top) tube • Lithium heparin (green-top) tube

Container

Serum separator tube (SST)

Temperature

Room temperature

Note: N-acetyl-p-benzoquinone imine (NAPQI) (metabolite of acetaminophen) will generate erroneously low results in samples for patients that have taken toxic doses of acetaminophen.

Turnaround

Set up: Mon-Sat; Report available: 3 days

Billing

CPT 84550