Erythrocyte Porphyrin (EP)
Order Code: FEP
Epic Lab Code: LAB942
Order Form: A-1a Miscellaneous Request or Epic Req
Commercial Mail-out Laboratory
6240 RCP
356-3527
Specimen:
Whole Blood
Collection Medium:
Lavender top tube 3 mL (EDTA)
Alternate Collection Media:
Pink top tube, Royal Blue K2 EDTA tube
Minimum:
Recommended minimum: 1.0 mL whole blood from lavender top tube Absolute minimum: 0.5 mL whole blood from lavender top tube
Rejection Criteria:
Specimens not collected in EDTA. Clotted specimens.
Delivery Instructions:
Wrap specimen in aluminum foil to protect from light.
Analytic Time:
5 days upon receipt at reference laboratory
Reference Range:
0 - 35 mcg/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.
Methodology:
Extraction/Fluorometry
CPT Code:
84202