Test Details

Mnemonic

PORPT

Ordering Code

3688000

CPT-4 Code(s)

84311

Specimen Information

Collect

Plain red-top
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Specimen Preparation

Centrifuge, separate serum from cells within one hour and send 2.0 mL serum frozen in an amber screw-capped plastic vial. PROTECT FROM LIGHT during centrifuge, storage and collection.
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Alternate Specimen

Plasma: Green sodium or lithium heparin, lavender EDTA
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Minimum Volume

1.0 mL
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Transport Temperature

Frozen
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Rejection Criteria

Hemolyzed specimen, body fluid other than serum
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Stability

Room temperature: Unacceptable
Refrigerated: 4 days
Frozen: 30 days
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Methodology

Scanning Fluorometry
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Reference Range

0 - 15 nmol/L
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Performing Laboratory

ARUP Reference Laboratory
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New York DOH Approval Status

Yes
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