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Chromium, 24 hour Urine

Centralized Core Laboratory : Chemistry

Test ID/Workstation :
CHRU MAYO
Specimen Type:
Urine
Tube Type:
Clean, plastic urine container with no metal cap or glued insert
Collection Volume:
24 hour urine collection
Cause for Rejection:
Urine collected within 72 hours after administration of iodinated or gadolinium based contrast media and acid preserved samples are unacceptable. Specimens contaminated with blood or fecal matter are not acceptable. Specimens transported in non-trace element free transport tubes are unacceptable.
Storage:
Refrigerated
Availability:
Sent to Reference Laboratory. Days Performed: Sun -Sat.
Methodology:
Dynamic Reaction Cell-Inductively Coupled Plasma-Mass Spectrometry (DRC-ICP-MS)
Special Instructions:
10.0 mL (minimum 5.0 mL) aliquot from a well-mixed 24 hour urine collection in a clean plastic container. Instruct patient on 24 hour urine collection. To begin the urine collection, have the patient void. DISCARD THIS URINE SPECIMEN. This is best done with the first morning specimen. Note the time and record on the requisition. From then on collect all that is voided and place in container. If more than one container is needed, please mark the first as #1 of 2 and retain on the floor until the collection is complete. The final void should be made 24 hours after the first void described earlier. The specimen should be included with the collection. Sample must be refrigerated during collection. Submit specimen in two trace element free containers. Note total volume and collection interval. ARUP studies indicate that refrigeration of urine alone, during and after collection, preserves specimens adequately, if tested within 14 days of collection. 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 advice of their physician). High concentrations of iodine may interfere with elemental testing. Collection of urine specimens from patients receiving iodinated and 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. Include total volume and collection interval with specimen.
Lab/Phone:
330-543-8418
TAT:
1-4 days
Additional Info:
Reference range available on patient report
CPT Code:
82495
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