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Test Code STFR1 sTfR (Soluble Transferrin Receptor), Serum


Ordering Guidance


This test should not be used for routine iron status evaluation for patients without confounding pathologies (such as inflammation, infection, chronic disease, or malignancy). For such cases order FERR1 / Ferritin, Serum.



Specimen Required


Supplies: Sarstedt Aliquot Tube, 5 mL (T914)

Collection Container/Tube:

Preferred: Serum gel

Acceptable: Red top

Submission Container/Tube: Plastic vial

Specimen Volume: 1 mL Serum

Collection Instructions:

1. Within 2 hours of collection, centrifuge the specimen.

2. For red-top tubes, aliquot serum into a plastic vial prior to sending.


Specimen Type

Serum

Specimen Minimum Volume

Serum: 0.6 mL

Specimen Stability Information

Specimen Type Temperature Time
Serum Refrigerated (preferred) 7 days
  Frozen  90 days
  Ambient  7 days

Reject Due To

Gross hemolysis Reject

Reference Values

0.63-2.64 mg/L

 

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

Day(s) Performed

Monday through Friday

Report Available

1 to 3 days

Specimen Retention Time

1 week

Performing Laboratory

Mayo Clinic Laboratories in Rochester

CPT Code Information

84238