Beta-2 Transferrin
Test Mnemonic
B2TRAN
CPT Codes
- 86335 - QTY (1)
LOINC ®
13876-8
Aliases
- CSF specific transferrin
- Tau Protein
Includes
- Beta-2 Transferrin
Performing Laboratory
ARUP
FDA Category
In Vitro Diagnostic
Specimen Requirements
| Volume | Type | Container | Collect Temperature | Transport Temperature | Special Instructions |
|---|---|---|---|---|---|
| 2 mL | Fluid, aural or nasal | Sterile container | Frozen |
Minimum Specimen Requirements
| Volume | Type | Container | Collect Temperature | Transport Temperature | Special Instructions |
|---|---|---|---|---|---|
| 1 mL |
Stability
| Environmental Condition | Description |
|---|---|
| Ambient | 2 weeks |
| Refrigerated | 2 weeks |
| Frozen | 2 weeks |
Days Performed
Sun - Sat
Turnaround Time
2 - 5 days
Methodology
| Name | Description |
|---|---|
| Qualitative Immunofixation Electrophoresis |
Reference Range
Special Info
If direct collection is not feasible, specimen may be collected using a plain cotton swab or gauze and submitted in a sterile container (plain test tube, collection container, microtube, or syringe). Do not collect with a culture swab. Specimens collected with additives or grossly contaminated with blood will be rejected. This test is New York State approved.
Clinical Info
Detection of a beta-2 transferrin band by immunofixation is indicative of the presence of cerebrospinal fluid.
Clinical Limitation
Aural or nasal specimens may be contaminated with saliva, which can degrade transferrin protein. Specimens should be frozen immediately after collection.