ARSENIC, URINE WITH REFLEX TO FRACTIONATED

Mnemonic

UARS

Specimen Collection Requirements

Patient Preparation

Diet, medication, and nutritional supplements may introduce interfering substances. Patients should be encouraged to discontinue nutritional supplements, vitamins, minerals, nonessential over-the-counter medications (upon the advice of their physician), and avoid shellfish and seafood for 48 to 72 hours. High concentrations of iodine may interfere with elemental testing. Collection of urine specimens from patients receiving iodinated or gadolinium-based contrast media should be avoided for a minimum of 72 hours post-exposure. Collection from patients with impaired kidney function should be avoided for a minimum of 14 days post contrast media exposure.

Collect

Urine, 24-hour or random urine collection

Handling

Specimen must be collected in a plastic container. ARUP studies indicate that refrigeration of urine alone, during and after collection, preserves specimens adequately if tested within 14 days of collection. Transfer 8 mL aliquot from a well-mixed collection to Trace Element-Free Transport Tubes. Available through Legacy Client Services. (Min: 2 mL)

Preferred Volume

8.0 mL

Minimum Volume

2.0 mL

Transport

Refrigerated

Rejection Criteria

Urine collected within 48 hours after administration of a gadolinium (Gd) containing contrast media (may occur with MRI studies). Acid preserved urine. Specimens contaminated with blood or fecal material. Specimens transported in non-trace element-free transport tube (with the exception of the original device).

Stability

Ambient: 1 week; Refrigerated (preferred): 2 weeks; Frozen: 1 year

Testing Information

Performed

Daily

Reported

2-6 days

Method

Inductively Coupled Plasma/Mass Spectrometry/High Pressure Liquid Chromatography

Referral Lab

ARUP (25000)

Reference Values

Reference Values

Random:    0-35.0 µg/L
24 hour:     0-50.0 µg/d

Comments

If total arsenic concentration is between 35-2000 µg/L, then Arsenic, Fractionated, will be added to determine the proportion of organic, inorganic, and methylated forms.  Additional charges apply.

CPT Codes

82175, If reflexed add 82175

Last Updated: Thursday, January 5, 2017 03:41:59 AM