Porphyrins, Fractionation and Quantitation, Urine
| Abbrev Code: | PORPU | ||
| Order Code: | LAB6057 | Order Name: | Porphyrins, Quantitative Urine |
| Synonyms: | Uroporphyrins, Urine; Porphyrins, Total Urinary | ||
| Methodology: | High performance liquid chromatography | ||
| CPT Codes: | 84120 x1 | ||
| Turnaround Time: | Specimens are sent to reference laboratory Mon-Sat; results are reported within 1-5 days. | ||
| Special Instructions: | Total volume and collection time interval is required. Protect specimen from light during collection, processing and shipping. | ||
| Compliance: | This test was developed and its performance characteristics determined by ARUP Laboratories. It has not been cleared or approved by the U.S. Food and Drug Administration. This test was performed in a CLIA certified laboratory and is intended for clinical purposes. |
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Collection Instructions
| Specimen: | Urine, random or timed collection, protected from light |
| Optimal Volume: | Submit entire collection; analysis requires 2 mL |
| Container: | Plastic leakproof container, sterile Alternate Containers: 3 L plastic jug |
| Collection Instructions: | Protect sample from light and refrigerate during collection. 24 hour collection preferred. |
| Causes for Rejection: | Not protected from light; stored at room temperature. Body fluids other than urine. |
Processing and Shipping
| Specimen Processing: | Aliquot 4 mL, 2 mL minimum. Protect from light. Store in freezer. Record total volume and collection time interval on transport tube. |
| Shipping Instructions: | Ship on dry ice. |
| Stability: | 4 days at refrigerated temperature, 1 month frozen. |
| Test Performed at or Referral Lab | Lab Sendouts (ARUP) |
| Referral Lab number: | 2002058 |
Interpretive
| Reference Range: |
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| Use: | Urine prophyrins are useful for the evaluation of cutaneous photosensitivity to exclude porphyria cutanea tarda (PCT). Evaluation of neurologic and/or psychiatric symptoms associated with acute porphyrias such as acute intermittent porphyria (AIP) requires urine porphobilinogen (PBG) testing. |
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