Aluminum, 24‑Hour Urine without Creatinine

Casandra

Casandra Test Code QD54330Version 1 (DRAFT)

Performing Lab

Lab Quest DiagnosticsLab Test ID 14451CPT Code 82108

Aluminum, 24‑Hour Urine without Creatinine

Clinical Use

Use

Determines total aluminum excreted in a 24‑hour urine collection, useful for monitoring aluminum exposure in settings such as dialysis patients or those with occupational/environmental exposure; evaluation of prosthetic implant wear; cannot be substituted with serum aluminum measurements. Clinical interpretation should consider renal function and context. (Source: Mayo Clinic Laboratory description)

Special Instructions

Requires collection of total 24‑hour urine volume (in milliliters). Specimens for metal analysis must be collected in acid‑washed or metal‑free containers to avoid contamination. Avoid collection after administration of gadolinium‑ or iodine‑containing contrast media within prior 96 hours. Record total volume on container and requisition. (Sources: Mayo Clinic Labs spec instructions, Medfusion instructions)

Limitations

Falsely elevated results may occur if non‑acid‑washed or metal‑cap containers are used. Preanalytical contamination is a major source of error in trace metals assays. Results should always be interpreted in clinical context. (Source: Mayo Clinic limitations and cautions)

Test Details

New York Approved

Methodology

Mass Spectrometry

Biomarkers

Aluminum

Analyte

Aluminum • Concentration / Level • Quantitative (Continuous) (e.g., copies/mL, % expression)

Total Volume

Other

Total Volume • Concentration / Level • Quantitative (Continuous) (e.g., copies/mL, % expression)

Result Turnaround Time

2-8 days

Specimen

Urine

Volume

10 mL aliquot (well‑mixed 24‑hour urine)

Minimum Volume

3 mL

Container

Plastic acid‑washed or metal‑free container (transport), clean plastic urine container with no metal cap (collection)

Collection Instructions

Collect urine for 24 hours; record total volume on container and requisition; transport an aliquot in acid‑washed/metal‑free container; refrigerate within 4 hours of completion; avoid gadolinium/iodine contrast within previous 96 hours.