Erythrocyte Porphyrin (EP), Whole Blood


Sunquest Code:EPORWB  
Epic Code:LAB6889Epic Name:Erythrocyte Porphyrin
Synonyms:Erythrocyte Protoporphyrin; RBC Protoporphyrin
Methodology:Fluorometry
CPT Code:84202
Turnaround Time:Specimens are sent to reference laboratory Mon-Sat; results are reported within 1-4 days.
Special Instructions:Protect specimen from light.


Collection Instructions

Specimen:Whole blood
Optimal Volume:1 mL
Minimum\Peds Volume:0.5 mL
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.
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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