Porphyrins Quant Urine, Random
Order Name
PORPH QT RU
Test Number: 3812201
Revision Date 12/09/2022
Test Number: 3812201
Revision Date 12/09/2022
| Test Name | Methodology | LOINC Code |
|---|---|---|
|
Porphyrins Quant Urine, Random
|
High-pressure liquid chromatography (HPLC) with fluorometric detection |
| SPECIMEN REQUIREMENTS | ||||
|---|---|---|---|---|
| Specimen | Specimen Volume (min) | Specimen Type | Specimen Container | Transport Environment |
| Preferred | 2 mL (1.5 mL) | Urine, Random | Sterile Screwtop Container | Refrigerated |
| Instructions | Specimen Type: 12-mL plastic transport tube (without preservative) Specimen Storage: Refrigerate and PROTECT FROM LIGHT. Specimen Collection: Transfer required aliquot into a LabCorp amber plastic transport tube with amber cap (LabCorp No. 23598). (If amber transport tubes are unavailable, cover transport tube completely, top and bottom, with aluminum foil. Identify specimen with patient's name directly on the amber transport tube AND on the outside of the aluminum foil. Secure with tape.) Specimen must be kept refrigerated during transport. Specimen Stability: Ambient: Unstable, Refrigerated : 7 days, Frozen: 14 days |
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| GENERAL INFORMATION | |
|---|---|
| Expected TAT | 3 - 5 days week days. |
| Clinical Use | Excess urinary porphyrin excretion, or porphyrinuria, results from inhibition of key enzymatic steps in such clinical conditions as genetic deficiencies in heme production enzymes, hepatitis, renal disease, and erythroid disease, as well as by heavy metal inhibition of heme enzyme synthesis. Both in experimental animals and in humans exposed to heavy metals, elevated levels of porphyrins have been found in urine. Uroporphyrins (UP) Coproporphyrin (CP) I Coproporphyrin (CP) III Heptacarboxylporphyrins (7-CP) Hexacarboxylporphyrins (6-CP) Pentacarboxylporphyrins (5-CP) |
| Performing Labcorp Test Code | 120980 |
| Notes | Labcorp Test Code: 120980 |
| CPT Code(s) | 84120 |
| Lab Section | Reference Lab |