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Test ID ZNUCR Zinc/Creatinine Ratio, Random, Urine


Ordering Guidance


The use of blood testing is recommended for children younger than 10 years. Order ZN_S / Zinc, Serum.



Specimen Required


Patient Preparation: High concentrations of barium are known to interfere with this test. If barium-containing contrast media has been administered, the specimen should not be collected for at least 96 hours.

 

Supplies: Urine Tubes, 10 mL (T068)

Collection Container/Tube: Clean, plastic urine collection container with no metal cap or glued insert

Submission Container/Tube: Plastic urine tube or clean, plastic aliquot container with no metal cap or glued insert

Specimen Volume: 3 mL

Collection Instructions:

1. Collect a random urine specimen.

2. See Metals Analysis Specimen Collection and Transport for complete instructions.


Reporting Name

Zinc/Creat Ratio, Random, U

Specimen Type

Urine

Specimen Stability Information

Specimen Type Temperature Time
Urine Refrigerated (preferred) 28 days
  Frozen  28 days
  Ambient  14 days

Report Available

2 to 5 days

Performing Laboratory

Mayo Clinic Laboratories in Rochester

LOINC Code Information

Test ID Test Order Name Order LOINC Value
ZNUCR Zinc/Creat Ratio, Random, U 13473-4

 

Result ID Test Result Name Result LOINC Value
615260 Zinc/Creat Ratio, U 13473-4
CRETR Creatinine, Random, U 2161-8

Useful For

Identifying the cause of abnormal serum zinc concentrations using a random urine specimen

Day(s) Performed

Monday, Thursday

Test Classification

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.

CPT Code Information

84630

82570

Specimen Minimum Volume

2 mL

Reference Values

ZINC/CREATININE:

0-17 years: Not established

≥18 years: 89-910 mcg/g creatinine

 

CREATITINE:

≥18 years old: 16-326 mg/dL

Reference values have not been established for patients who are younger than 18 years.

Method Name

ZNCU: Triple-Quadrupole Inductively-Coupled Plasma Mass Spectrometry (ICP-MS/MS)

CRETR: Enzymatic Colorimetric Assay

Profile Information

Test ID Reporting Name Available Separately Always Performed
ZNCU Zinc/Creat Ratio, U No Yes
CRETR Creatinine, Random, U No Yes