The evaluation of suspected iron-deficiency in patients who may have inflammation, infection, or chronic disease and other conditions in which ferritin concentration does not correlate with iron status, and also used in the evaluation of insulin-dependent diabetics for iron-deficiency resulting from gastric autoimmunity and atrophic gastritis.
1.8 - 4.6 mg/L
The sTfR immunoassay should not be used for the routine clinical evaluation of patients for iron status when ferritin immunoassay would be appropriate, such as in the absence of confounding pathologies (inflammation, infection, chronic disease, or malignancy). Patients with hemolysis and recent blood loss may have falsely elevated sTfR levels. sTfR is elevated in patients with thalassemia and sickle cell disease. Caution should be exercised in managing anemia in these individuals based on sTfR test results.
2 - 4 days
- Soluble Transferrin Receptor
Collect specimen in an SST or Red top tube. Centrifuge, aliquot serum into a plastic vial and freeze within 2 hours.
Test sent to Mayo Medical Laboratories.