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Porphyrins, Total, Plasma
Message.
Test Code
Q10290
Preferred Specimen
2 mL plasma (0.4 mL minimum).
Alternate specimen: 2 mL serum (0.4 mL minimum).
Alternate specimen: 2 mL serum (0.4 mL minimum).
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
Sodium heparin (green-top) or EDTA (lavender-top)
Alternate specimen: No additive (red-top)
Alternate specimen: No additive (red-top)
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?)
Serum in SST tube; not protected from light, hemolyzed
Methodology
High Performance Liquid Chromatography (HPLC)
Setup Schedule
Set up: Tues, Thurs; Report available: 6-11 days
Clinical Significance
To diagnose patients with chronic renal failure who may be suspected of primary or secondary porphyria.
