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Test Code Billings Clinic: 8941 Mayo: EPO Erythropoietin, Serum

Reporting Name

Erythropoietin (EPO), S

Performing Laboratory

Mayo Clinic Laboratories in Rochester

Useful For

An aid in distinguishing between primary and secondary polycythemia

 

Differentiating between appropriate secondary polycythemia (eg, high-altitude living, pulmonary disease, tobacco use) and inappropriate secondary polycythemia (eg, tumors)

 

Identifying candidates for erythropoietin (EPO) replacement therapy (eg, those with chronic renal failure)

 

Evaluating patients undergoing EPO replacement therapy who demonstrate an inadequate hematopoietic response

Method Name

Immunoenzymatic Assay


Specimen Required


Collection Container/Tube:

Preferred: Serum gel

Acceptable: Red top

Submission Container/Tube: Plastic vial

Specimen Volume: 0.6 mL

Collection Instructions:

1. Morning collection, 7:30 a.m.-12 p.m. is preferred due to diurnal variation. For more information see Cautions.

2. Centrifuge and aliquot serum into a plastic vial.


Specimen Type

Serum

Specimen Minimum Volume

0.5 mL

Specimen Stability Information

Specimen Type Temperature Time Special Container
Serum Refrigerated (preferred) 14 days
  Frozen  14 days
  Ambient  7 days

Reject Due To

Gross hemolysis Reject
Gross lipemia OK
Gross Icterus OK

Reference Values

2.6-18.5 mIU/mL

Interpretation

In the appropriate clinical setting (eg, confirmed elevation of hemoglobin >18.5 g/dL, persistent leukocytosis, persistent thrombocytosis, unusual thrombosis, splenomegaly, and erythromelalgia), polycythemia vera is unlikely when erythropoietin (EPO) levels are elevated but is likely when EPO levels are suppressed.

 

EPO levels are also increased in patients with anemia of bone marrow failure, iron deficiency, or thalassemia.

 

Patients, who have either a poor or no erythropoietic response to EPO therapy, but high-normal or high EPO levels, may have additional, unrecognized causes for their anemia. If no contributing factors can be identified after adequate further study, the possibility that the patient may have developed EPO-antibodies should be considered. This can be a serious clinical situation that can result in red cell aplasia and should prompt expeditious referral to hematologists or immunologists skilled in diagnosing and treating this disorder.

Day(s) Performed

Monday through Friday

Report Available

1 to 3 days

Test Classification

This test has been cleared, approved, or is exempt by the US Food and Drug Administration and is used per manufacturer's instructions. Performance characteristics were verified by Mayo Clinic in a manner consistent with CLIA requirements.

CPT Code Information

82668

LOINC Code Information

Test ID Test Order Name Order LOINC Value
EPO Erythropoietin (EPO), S 15061-5

 

Result ID Test Result Name Result LOINC Value
EPO Erythropoietin (EPO), S 15061-5

Forms

If not ordering electronically, complete, print, and send 1 of the following forms with the specimen:

-General Request (T239)

-Benign Hematology Test Request (T755)