ARSENIC, URINE WITH REFLEX TO FRACTIONATED
Specimen Collection Requirements
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.
Urine, 24-hour or random urine collection
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)
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).
Ambient: 1 week; Refrigerated (preferred): 2 weeks; Frozen: 1 year
Inductively Coupled Plasma/Mass Spectrometry/High Pressure Liquid Chromatography
Random: 0-35.0 µg/L
24 hour: 0-50.0 µg/d
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.
82175, If reflexed add 82175
Thursday, January 5, 2017 03:41:59 AM