Beta-2 Transferrin
| Label Mnemonic: | B2TD |
| Epic code: | LAB2708 |
| Downtime form: | A-1a Doctor/Provider Orders - Pathology Core and Specialty Care Nursery |
Commercial Mailout Laboratory
6240-8 RCP
356-8593
6240-8 RCP
356-8593
Specimen(s):
Aural or Nasal Fluid
Collection Medium:
| Sterile container |
Minimum:
Preferred Minimum: 2 mL aural or nasal fluid in a sterile
container
Absolute Minimum: 1 mL aural or nasal fluid in a sterile container
Absolute Minimum: 1 mL aural or nasal fluid in a sterile container
Turn Around
Time:
1-4 days upon receipt at reference laboratory
Reference Range:
None detected
Interpretive Data:
Detection of a beta-2 transferrin band by IFE is diagnostic for the
presence of cerebrospinal fluid (CSF). This test is useful in the
differential diagnosis for CSF otorrhea or CSF rhinorrhea. Beta-2
transferrin is not detected by this methodology in normal serum, tears,
saliva, sputum, nasal, or aural fluid.
Test
Limitations:
The beta-2 transferrin protein assay by IFE methodology is not a
reliable method for detecting human perilymph due to the low
sensitivity of the assay.
Methodology:
Qualitative Immunofixation Electrophoresis
CPT Code:
86335 IFE Fluid