Erythrocyte Porphyrin (EP)
| Label Mnemonic: | FEP |
| Epic code: | LAB942 |
| Downtime form: | A-1a Doctor/Provider Orders - Pathology Core and Specialty Care Nursery |
Commercial Mailout Laboratory
6240-8 RCP
356-8593
6240-8 RCP
356-8593
Specimen(s):
Whole Blood
Specimen
Instructions:
Protect from light during collection,
storage, and shipment.
Collection Medium:
 |
| Lavender top tube 3 mL (EDTA) |
Minimum:
Recommended Minimum: 1.0 mL whole blood
Absolute Minimum: 0.5 mL whole blood
Absolute Minimum: 0.5 mL whole blood
Rejection Criteria:
Specimens not collected in EDTA. Clotted specimens.
Delivery Instructions:
Wrap specimen in aluminum foil to protect from light.
Turn Around
Time:
1-4 days upon receipt at reference laboratory
Reference Range:
0-35 μg/dL
Test
Limitations:
Elevated Erythrocyte Porphyrin (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 Elevated
protoporphyrin (as in erythropoietic protoporphyria) and zinc
coproporphyrin (usually associated with childbirth) can increase the
apparent EP signal.
Specimens which are hemolyzed, clotted, or improperly aliquoted may show false elevations.
Specimens which are hemolyzed, clotted, or improperly aliquoted may show false elevations.
Methodology:
Fluorometry
CPT Code:
84202