Test Details

Mnemonic

PORPT

Ordering Code

3688000

CPT-4 Code(s)

84311

Specimen Information

Collect

Red top

Specimen Preparation

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

Alternate Specimen

Plasma: Green sodium or lithium heparin, lavender EDTA

Minimum Volume

1.0 mL

Transport Temperature

Frozen

Rejection Criteria

Hemolyzed specimen, body fluid other than serum

Stability

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

Methodology

Scanning Fluorometry
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Reference Range

0 - 15 nmol/L
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Performing Laboratory

ARUP
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New York DOH Approval Status

Yes
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