Soluble Transferrin Receptor Level
| Label Mnemonic: | STR |
| Epic code: | LAB8683 |
| Order form: | Laboratory Requisition |
| Supply order: | Supply Order Form |
| Billing: | Billing Policies |
| CPT code: | 84238 |
Specimen(s):
Serum
Collection Medium:
 |
| Red top tube 5 mL (Clot Activator) |
Minimum:
Preferred Minimum: 1 mL plasma
Absolute Minimum: 0.3 mL plasma
Turn Around
Time:
1 – 2 days upon receipt at reference laboratory (upon receipt in laboratory)
Reference Range:
1.8-4.6 mg/L
It is reported that African Americans may have slightly higher values.
Interpretive Data:
Soluble transferrin receptor (sTfR) concentrations are inversely related to iron status; sTfR elevates in response to iron deficiency and decreases in response to iron repletion.
Methodology:
Immunoturbidimetric Assay
Sample
Processing:
Centrifuge within two hours of draw time.
Label transport tube with patient last name, first name, identification number, date and time of collection.
Separate plasma into screw-capped plastic vial.
Label transport tube with patient last name, first name, identification number, date and time of collection.
Separate plasma into screw-capped plastic vial.
Sample
Storage:
Store frozen.
Transport
Instructions:
Place labeled specimen into zip-lock type biohazard bag; seal bag.
Place completed requisition into outside pocket of bag.
Place dry ice on top of specimen in Styrofoam container to maintain frozen temperature.
Place completed requisition into outside pocket of bag.
Place dry ice on top of specimen in Styrofoam container to maintain frozen temperature.