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Beaumont Laboratory

Soluble Transferrin Receptor

sTfR, MAYO: STFR, EPIC: LAB6152, SOFT: XSTR

Specimen Collection Criteria

Collect (preferred specimen): One Gold-top SST tube.
Also acceptable: One plain Red-top tube.

Physician Office/Drawsite Specimen Preparation

Let specimen clot completely then centrifuge to separate serum from cells within two hours of collection. Transfer serum to a plastic transport tube and freeze (-20°C/-4°F or below).

Preparation for Courier Transport

Transport: 1.0 mL serum, frozen (-20°C/-4°F or below). (Min: 0.25 mL)

Rejection Criteria

  • Grossly hemolyzed specimens.
  • Specimens not collected and processed as indicated.

Storage

Specimen Stability for Testing:

Room Temperature (20-26°C or 68-78.8°F): 72 hours
Refrigerated (2-8°C or 36-46°F): 7 days
Frozen (-20°C/-4°F or below): 90 days

Specimen Storage in Department Prior to Disposal:

Specimen retention time is determined by the policy of the reference laboratory. Contact the Sendout Laboratory with any questions.

Laboratory

Sent to Mayo Medical Laboratory Rochester, MN.

Performed

Saturday - Sunday.
Results available in 2-4 days.

Reference Range

1.8-4.6 mg/L.

It is reported that African Americans may have slightly higher values.

Test Methodology

Immunoturbidimetric Assay.

Clinical Utility

The concentration of Soluble Transferrin Receptor (sTfR) is an indicator of iron status. Iron deficiency causes overexpression of transferrin receptor and sTfR levels, while iron repletion results in decreased sTfR levels. sTfR levels should be used to evaluate 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.

CPT Code

84238.

Test Codes

MAYO: STFR, EPIC: LAB6152, SOFT: XSTR

Last Updated

10/13/2016

Microtainer® and Vacutainer® are registered trademarks of Becton, Dickinson and Company.
UroVysion® is a registered trademark of Abbott Laboratories. ThinPrep® is a registered trademark of Hologic, Incorporated.

This directory currently reflects information only for specimens collected and/or processed at the Farmington Hills, Grosse Pointe, Royal Oak, and Troy campuses.