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Porphyrins, Urine Fractionated
Test CodeLAB433
CPT Codes
84120
Includes
Porphyrins, Fractionated, Quantitative, 24-Hour Urine (Coproporphyrin I, Coproporphyrin III, Heptacarboxyporphyrin, Hexacarboxyporphyrin, Pentacarboxyporphyrin, Total Porphyrins, Uroporphyrin I, Uroporphyrin III) and Porphobilinogen, Quantitative, 24-Hour Urine
Preferred Specimen
24 Hour Urine container
Minimum Volume
3 mL
Instructions
Protect sample from light: 2 mL random urine in 5 grams sodium carbonate (Na2CO3) container or no preservative container. Random urine collected with 5 grams of sodium carbonate, refrigerated, and protected from light during collection is preferred. Collection with no preservative is acceptable, if properly refrigerated and light protected. Transport refrigerated (cold packs): Okay to thaw Catheterized urine or First void clean catch urine or Random clean catch urine are also acceptable.
Transport Temperature
Refrigerated
Specimen Stability
Room temperature: Unacceptable
Refrigerated: 7 days
Frozen: 30 days
Refrigerated: 7 days
Frozen: 30 days
Methodology
High Performance Liquid Chromatography (HPLC)
