Test ID 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.
Secondary ID
623578Useful For
Aiding in the diagnosis of iron deficiency anemia in patients with chronic disease
Specimen Type
SerumSpecimen 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 daysPerforming Laboratory
Mayo Clinic Laboratories in Rochester
CPT Code Information
84238