PORPHYRINS, TOTAL, SERUM

Specimen Required
Draw blood in a plain red-top tube. Centrifuge, separate serum from cells within one hour and send 2.0 mL serum (1.0 mL minimum) frozen in an amber screw-capped plastic vial. PROTECT FROM LIGHT.

Alternate Specimen
Plasma: Sodium or lithium heparin, EDTA

Rejection Criteria
Hemolyzed specimen, body fluid other than serum

Methodology
Scanning Fluorometry

Stability
Room Temperature: Unacceptable; Refrigerated: 4 days; Frozen: 1 month

Reference Range
0-15 nmol/L

Performed
Sunday, Tuesday, Thursday

Turnaround Time5-7 days
Test CodePORPT
CPT-4 Code (s)
84311
LOINC Codes
Porphyrin Total   33311-2  
Porphyrin, Total, Interpretation   14883-3  

Warde
Medical
Laboratory