Aluminum/Creatinine Ratio, Urine
Use
Measurement of aluminum concentration as a part of assessing for aluminum exposure. Useful for monitoring aluminum exposure when a 24‑hour urine cannot be collected, and for monitoring metallic prosthetic implant wear under the same constraint. Not an acceptable substitute for serum aluminum measurements and not recommended for routine aluminum screening.
Special Instructions
Only orderable as part of a profile, specifically the profile including ALCU and CRETR (Creatinine, Random, U).
Limitations
This test was developed and its performance characteristics determined by Mayo Clinic in a manner consistent with CLIA requirements; it has not been cleared or approved by the US Food and Drug Administration. Falsely increased results may be obtained if specimen is collected in non‑acid washed polypropylene vessels or if metal caps are used. Preanalytical steps are most likely to affect trace metals analysis quality.
New York Approved
Methodology
Mass Spectrometry (LC‑MS/MS)
Biomarkers
LOINC Codes
- 13470‑0
- 13470‑0
Result Turnaround Time
2-8 days
Related Documents
For more information, please review the documents below
Specimen
Urine
Volume
3 mL
Minimum Volume
0.7 mL
Container
Clean, plastic urine collection container with no metal cap or glued insert; submission in plastic urine tube or clean plastic aliquot container with no metal cap or glued insert
Collection Instructions
Collect a random urine specimen. Patient should not have had gadolinium‑ or iodine‑containing contrast media administered within the prior 96 hours.
Patient Preparation
Avoid gadolinium‑ or iodine‑containing contrast media for 96 hours before collection.
Causes for Rejection
All specimens will be evaluated at Mayo Clinic Laboratories for test suitability.
Stability Requirements
| Temperature | Period |
|---|---|
| Room Temperature | 14 days |
| Refrigerated | 28 days |
| Frozen | 28 days |