Aluminum/Creatinine Ratio, Random, Urine
Use
Monitoring aluminum exposure when a 24‑hour urine cannot be collected. Monitoring metallic prosthetic implant wear when a 24‑hour urine cannot be collected. This test is not an acceptable substitute for serum aluminum measurements and is not recommended for routine aluminum screening.
Special Instructions
Patient preparation: High concentrations of gadolinium and iodine may interfere with ICP‑MS metal tests; do not collect specimen for 96 hours after gadolinium‑ or iodine‑contrast administration. Use clean plastic urine collection container (no metal cap or glued insert); submission container must also be plastic with no metal components. Requires random urine specimen; see Metals Analysis Specimen Collection and Transport PDF for complete instructions.
Limitations
Falsely increased results may occur if specimen is collected in non‑acid‑washed polypropylene vessel or metal‑capped tube. Preanalytical steps are most likely to affect trace metals analysis in clinical samples. This test was developed and validated per CLIA and has not been FDA cleared or approved.
New York Approved
Methodology
Mass Spectrometry (LC-MS/MS)
Biomarkers
LOINC Codes
- 13470-0
- 2161-8
- 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 and submission container (no metal cap or glued insert)
Collection Instructions
Collect a random urine specimen. See Metals Analysis Specimen Collection and Transport for complete instructions.
Patient Preparation
Do not collect specimen for 96 hours after gadolinium- or iodine-containing contrast administration.
Causes for Rejection
All specimens will be evaluated for test suitability; improper collection vessels (non‑acid‑washed or metal caps) may cause erroneous results.
Stability Requirements
| Temperature | Period |
|---|---|
| Room Temperature | 14 days |
| Refrigerated | 28 days |
| Frozen | 28 days |