Zinc, Plasma

Test Code

945X

CPT Codes
84630

Preferred Specimen

2 mL Trace Element Collection plasma (0.5 mL minimum)

Minimum Volume

0.7 mL

Other Acceptable Specimens

Serum collected in: No additive (royal blue-top) tube

Instructions

Be sure to gently mix the specimen promptly after phlebotomy. Centrifuge the tube at 1000G for 10 minutes, separate plasma from cells immediately, pour the plasma into a plastic trace element shipping container. Hemolysis is unacceptable. Use powder-less gloves. Firmly replace the cap on the vial and ship the specimen at room temperature. Do not use royal-blue top tube tubes containing heparin since the specimen frequently will gel or develop microclots overtime. Separate plasma from cells within 2 hours. Transfer separated plasma to a plastic transfer vial from Quest Diagnostics trace element collection system.

Transport Container

EDTA (royal blue-top)

Transport Temperature

Room temperature, stable 5 days

Specimen Stability

Room temperature: 5 days
Refrigerated: 10 days
Frozen: 30 days

Reject Criteria (Eg, hemolysis? Lipemia? Thaw/Other?)

Gel barrier tube; Moderate to gross hemolysis

Methodology
Inductively-Coupled Plasma/Optical Emission Spectroscopy

FDA Status
This test was developed and its analytical performance characteristics have been determined by Quest Diagnostics. It has not been cleared or approved by the U.S. Food and Drug Administration. This assay has been validated pursuant to the CLIA regulations and is used for clinical purposes.

Setup Schedule

Set up: Mon-Sat; Report available: 1-2 days

Reference Range

Pediatrics
<6 months:	26 - 141 mcg/dL
6-11 months:	29 - 131 mcg/dL
1 year:	31 - 120 mcg/dL
2-3 years:	29 - 115 mcg/dL
4-5 years:	48 - 119 mcg/dL
6-9 years:	48 - 129 mcg/dL
10-13 years:	25 - 148 mcg/dL
14-17 years:	46 - 130 mcg/dL
Adult:	60 - 130 mcg/dL

Clinical Significance

This assay may be useful in supporting or ruling out a diagnosis of Sjögren’s syndrome.

Performing Laboratory
Quest Diagnostics Nichols Institute
14225 Newbrook Drive
Chantilly, VA 20153

The CPT Codes provided in this document are based on AMA guidelines and are for informational purposes only. CPT coding is the sole responsibility of the billing party. Please direct any questions regarding coding to the payor being billed. Any Profile/panel component may be ordered separately. Reflex tests are performed at an additional charge.