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
Refrigerated: 4 days
Frozen: 30 days
Methodology
Scanning Fluorometry
Reference Range
0 - 15 nmol/L
Performing Laboratory
ARUP
New York DOH Approval Status
Yes