Gadolinium, 24 Hour, Urine

Test Code

37317

CPT Codes
83018

Preferred Specimen

10 mL urine collected in a 10 mL urine tube (T068) or clean, plastic aliquot container with no metal cap or glued insert

Patient Preparation
High concentrations of gadolinium and iodine are known to interfere with most metal tests. If either gadolinium- or iodine-containing contrast media has been administered, a specimen should not be collected for 96 hours.

Minimum Volume

0.3 mL

Other Acceptable Specimens

24-hour urine preserved with: 6N HCl, Toluene, or 6N HNO3

Instructions

1. Collect urine for 24 hours.
2. Refrigerate specimen within 4 hours of completion of 24-hour collection.
3. See Trace Metals Analysis Specimen Collection and Transport in Special Instructions for complete instructions.

Additional Information:
See Urine Preservatives-Collection and Transportation for 24-Hour Urine Specimens in Special Instructions for multiple collections.

Notes: 24-Hour volume is required.

Transport Temperature

Refrigerated (cold packs)

Specimen Stability

Room temperature: 28 days
Refrigerated: 28 days
Frozen: 28 days

Methodology
Inductively Coupled Plasma/Mass Spectrometry (ICP/MS)

FDA Status
This test was developed and its performance characteristics determined by Mayo Clinic in a manner consistent with CLIA requirements. This test has not been cleared or approved by the U.S. Food and Drug Administration.

Setup Schedule

Sets up 1 day a week.

Report Available

Reports in 2 to 9 days.

Clinical Significance

Assessing chronic exposure and monitoring effectiveness of dialysis in 24-hour urine collection.

The CPT Codes provided in this document are based on AMA guidelines and are for informational purposes only. CPT coding is the sole responsibility of the billing party. Please direct any questions regarding coding to the payor being billed. Any Profile/panel component may be ordered separately. Reflex tests are performed at an additional charge.