Erythrocyte Porphyrin (EP), Whole Blood
| Abbrev Code: | EPORWB | ||
| Order Code: | LAB6889 | Order Name: | Erythrocyte Porphyrin |
| Synonyms: | Erythrocyte Protoporphyrin; RBC Protoporphyrin | ||
| Methodology: | Fluorometry | ||
| CPT Codes: | 84202 x1 | ||
| Turnaround Time: | Specimens are sent to reference laboratory Mon-Sat; results are reported within 2-5 days. | ||
| Special Instructions: | Protect specimen from light. | ||
Collection Instructions
| Specimen: | Whole blood |
| Optimal Volume: | 1 mL |
| Minimum\Peds Volume: | 0.5 mL |
| Container: | Purple (EDTA) protect from light |
| Collection Instructions: | Protect from light during collection, storage and shipment. |
Processing and Shipping
| Specimen Processing: | Do not centrifuge. Transfer 1 mL; 0.5 mL minimum whole blood into an ARUP amber aliquot tube. Store refrigerated. |
| Shipping Instructions: | Ship at refrigerated temperature. |
| Stability: | Stability: 2 weeks refrigerated. |
| Test Performed at or Referral Lab | Lab Sendouts (ARUP) |
| Referral Lab number: | 20610 |
Interpretive
| Reference Range: | By report. |
| Use: | Elevated EP results are seen in early and late iron deficiency, in the anemia of chronic disease and in chronic lead poisoning (typically when blood lead is greater than 25 ug/dL.) Elevated protoporphyrin (as in erythropoietic protoporphyria) and zinc coproporphyrin (usually associated with childbirth) can increase the apparent EP signal. |
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