Casandra
Casandra Test Code MC48383Version 1 (DRAFT)
Performing Lab
Zinc/Creatinine Ratio, Random, Urine
Clinical Use
Order TestUse
Measurement of urinary zinc normalized to creatinine to help identify cause of abnormal serum zinc concentrations, using a random urine specimen.
Special Instructions
Not provided.
Limitations
Interference by high barium levels; uses unpublished Mayo ICP‑MS/MS method for zinc, enzymatic colorimetric assay for creatinine.
Test Details
New York Approved
Methodology
Mass Spectrometry (LC-MS/MS)
Biomarkers
Zinc/Creatinine Ratio
AnalyteZinc/Creatinine Ratio
Concentration / Level • Quantitative (Continuous) (e.g., copies/mL, % expression)
LOINC Codes
Order Codes
- 13473-4 - Zinc/Creat Ur
Result Codes
- 2161-8 - Creat Ur-mCnc
- 13473-4 - Zinc/Creat Ur
Result Turnaround Time
2-5 days
Related Documents
For more information, please review the documents below
Specimen Requirements
Specimen
Urine
Volume
3 mL
Minimum Volume
2 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 Preparation
If barium‑containing contrast media was administered, do not collect specimen for at least 96 hours.
Stability Requirements
| Temperature | Period |
|---|---|
| Room Temperature | 14 days |
| Refrigerated | 28 days |
| Frozen | 28 days |