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Test Code ZN_S Zinc, Serum

Additional Codes

Torrance Memorial Laboratories Test Code:  65453448


Specimen Required


Patient Preparation: High concentrations of gadolinium, iodine, and barium are known to interfere with most metal tests. If gadolinium-, iodine, or barium-containing contrast media has been administered, the specimen should not be collected for 96 hours.

Supplies:

-Metal Free Specimen Vial (T173)

-Metal Free B-D Tube (No Additive), 6 mL (T184)

Collection Container/Tube: 6-mL Plain, royal blue-top Vacutainer plastic trace element blood collection tube

Submission Container/Tube: 7-mL Mayo metal-free, screw-capped, polypropylene vial

Specimen Volume: 0.8 mL

Collection Instructions:

1. This specimen must always be drawn first.

2. Do not collect specimen from a line.

3. Allow the specimen to clot for 30 minutes; then centrifuge the specimen to separate serum from the cellular fraction. Serum must be removed from cellular fraction within 4 hours of specimen collection. Avoid hemolysis.

4. Remove the stopper. Carefully pour specimen into a Mayo metal-free, polypropylene vial, avoiding transfer of the cellular components of blood. Do not insert a pipet into the serum to accomplish transfer, and do not ream the specimen with a wooden stick to assist with serum transfer.

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


Useful For

Detecting zinc deficiency

Method Name

Dynamic Reaction Cell-Inductively Coupled Plasma-Mass Spectrometry (DRC-ICP-MS)

Reporting Name

Zinc, S

Specimen Type

Serum

Specimen Stability Information

Specimen Type Temperature Time Special Container
Serum Refrigerated (preferred) 28 days METAL FREE
  Ambient  28 days METAL FREE
  Frozen  28 days METAL FREE

Reject Due To

Gross hemolysis Reject
Gross lipemia OK
Gross icterus OK

Reference Values

0-10 years: 60-120 mcg/dL

11-17 years: 66-110 mcg/dL

≥18 years: 60-106 mcg/dL

Day(s) Performed

Monday through Saturday

Report Available

1 to 3 days

Performing Laboratory

Mayo Clinic Laboratories in Rochester

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

LOINC Code Information

Test ID Test Order Name Order LOINC Value
ZN_S Zinc, S 5763-8

 

Result ID Test Result Name Result LOINC Value
7735 Zinc, S 5763-8

Forms

If not ordering electronically, complete, print, and send General Test Request (T239) with the specimen.