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HelpTest Code STFR Soluble Transferrin Receptor (sTfR), Serum
Performing Laboratory
Mayo Clinic Laboratories in Rochester
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 daysSpecimen Retention Time
1 weekReject Due To
| Gross hemolysis | Reject |