Porphyrin Screen (PORPHYRIN)
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| Synonyms:
| Uroporphyrin, Coproporphyrin |
| Specimen: | Urine; random 2 mL in a urine container protected from light. |
| Volume: | 2 mL urine |
| Minimum Volume: | 1.5 mL urine |
| Collection: | Submit urine in an amber colored container or wrap completely in tin foil.
Refrigerate 1t 2-8°C. |
| Rejection Criteria: | Stored specimen not refrigerated; specimen exposed to light; acid preservative; pH less than 3; improper labeling. |
| Reference Range: | Negative |
| Methodology: | High-pressure liquid chromatography (HPLC) with fluorometric detection. |
| Test Use: | Diagnosis of porphyrias |
| Additional Information: | Clinician may elect to order a 24 hour urine quantitation if screen is positive. |
| Testing Includes: | Specimen sent to LabCorp. LabCorp test # 120980.
Coproporphyrins I and III; uroporphyrins; hepatocarboxylporphyrins; hexacarboxylporphyrins;
pentacarboxylporphyrins.
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| Testing Facility: | LabCorp |