Laboratory Services
Coagulation Factor XI Activity Assay, Plasma
Print this pageUpdated Test Information:
| Test Description |
Coagulation Factor XI Activity Assay, Plasma
|
|
|---|---|---|
| Synonym(s) |
Factor 11, UOW1218 |
|
| Test ID |
F11
|
|
| General Information |
Clinical assay interference and limitations: Patients on bivalirudin (Angiomax), dabigatran (Pradaxa), argatroban (Novastan), rivaroxaban (Xarelto), apixaban (Eliquis), and edoxaban (Savaysa) may show prolonged clotting times. This may cause an under- estimation of the factor concentrations. Emicizumab (Hemlibra) will affect all PTT-based assays and will overestimate the factor concentrations. Outside clients should fill and submit Coagulation Patient Clinical History Form |
|
| Container Type |
3 or 5 mL Blue Top (Citrate) tube |
|
| Specimen Type |
Blood |
|
| Specimen Requirements |
Entire Specimen |
|
| Specimen Collection / Processing Instructions |
The Laboratory MUST process specimen, within 4 hrs of blood collection. Centrifuge for 10 minutes, remove plasma & re-spin plasma for another 10 minutes. Decant & Freeze plasma (minimum 1.0 mL) @ -20°C to -80°C. Send frozen on dry ice. |
|
| Department (code) |
Coagulation (COAG) |
|
| Methodology |
Stago STA Clottable Factor assay |
|
| Estimated TAT |
By end of next business day |
|
| Testing Schedule |
Monday - Friday |
|
| CPT Code(s) |
85270 |
|
| Reference Range File | View/Download File | |
| STAT Orderable (Y/N) |
Yes |
|
| Performing Lab |
UW |
|
| LOINC Code(s) |
