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Porphyrins, Total, Plasma
Test Code10290
CPT Codes
82542
Preferred Specimen
2 mL plasma collected in a sodium heparin (green-top) tube - protect from light
Minimum Volume
0.6 mL
Other Acceptable Specimens
Plasma collected in an EDTA (lavender-top) tube • Serum collected in a red-top tube (no gel)
Instructions
Light protection is required; collect blood sample with foil-wrapped tube. Separate plasma or serum specimens by centrifugation. Avoid hemolysis. Remove 2 mL plasma or serum to a light-protected tube.
Freeze immediately after separation and ship frozen samples on dry ice.
Freeze immediately after separation and ship frozen samples on dry ice.
Transport Container
Transport tube - protected from light
Transport Temperature
Frozen
Specimen Stability
Room temperature: 8 hours
Refrigerated: 8 hours
Frozen: 90 days
Refrigerated: 8 hours
Frozen: 90 days
Reject Criteria (Eg, hemolysis? Lipemia? Thaw/Other?)
Not protected from light • Hemolysis • Serum separator tube (SST®)
Methodology
High Performance Liquid Chromatography (HPLC)
Setup Schedule
Set up: Tues, Thurs; Report available: 6-11 days
Reference Range
1.0-5.6 mcg/L
Clinical Significance
To diagnose patients with chronic renal failure who may be suspected of primary or secondary porphyria.
Performing Laboratory
Quest Diagnostics Nichols Inst San Juan Capistrano
33608 Ortega Highway
San Juan Capistrano, CA 92690-6130