Test Details

Mnemonic

MERWB

Ordering Code

3707110

CPT-4 Code(s)

83825

Specimen Information

Collect

Dark blue EDTA

Specimen Preparation

Send 4.0 mL whole blood in original tube or in a Quest trace element blood transport tube (lavender label).

Alternate Specimen

Whole blood: Dark blue sodium heparin

Minimum Volume

2.0 mL

Transport Temperature

Refrigerated

Rejection Criteria

Clotted specimen

Stability

Room temperature: 5 days
Refrigerated: 7 days
Frozen: Unacceptable

Methodology

Inductively Coupled Plasma/Mass Spectrometry
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Reference Range

<10 mcg/L
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Performing Laboratory

Quest Valencia
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DUE TO A NATIONWIDE SHORTAGE OF DARK BLUE EDTA TRACE ELEMENT TUBES, WARDE LAB IS TEMPORARILY ACCEPTING LAVENDER EDTA TUBES.