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HelpOrderable Name STFR Soluble Transferrin Receptor (sTfR), Serum
Additional Codes
CNE Order Code: sTfR
Useful For
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, including:
-Cystic fibrosis patients who frequently have inflammation or infections(2-3)
-Evaluating insulin-dependent diabetics who may have iron-deficiency resulting from gastric autoimmunity and atrophic gastritis(4)
Specimen Type
SerumSpecimen 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
Collection Instructions:
1. Serum gel tubes should be centrifuged within 2 hours of collection.
2. Red-top tubes should be centrifuged, and the serum aliquoted into a plastic vial within 2 hours of collection.
Specimen Minimum Volume
0.25 mL
Specimen Stability Information
| Specimen Type | Temperature | Time | Special Container |
|---|---|---|---|
| Serum | Frozen (preferred) | 90 days | |
| Refrigerated | 7 days | ||
| Ambient | 72 hours |
Reference Values
1.8-4.6 mg/L
It is reported that African Americans may have slightly higher values.
Day(s) Performed
Monday through Sunday
CPT Code Information
84238
Report Available
Same day/1 to 2 daysReject Due To
| Gross hemolysis | Reject |
Method Name
Immunoturbidimetric Assay