Factor XI Assay
Tube Type
| Test ID |
LAB309 |
| EPIC Order |
FACTOR 11 ACTIVITY |
| CPT Code(s) |
85270 |
| Group/Individual Test |
Individual |
| Laboratory |
Core Laboratory |
| Tube Station |
30 Routine: 888 STAT |
| Specimen |
Routine: |
2.7 mL Blood/Lt Blue Sodium Citrate tube; See Comments |
| Pediatric: |
1.8 mL Blood Pediatric Lt Blue Sodium Citrate tube |
| Stability |
Unspun: |
4 hours |
| Room Temperature: |
4 hours |
| Refrigerated: |
NO |
| Frozen: |
14 days (plasma only) |
| Availability |
Routine: |
24 Hours/Day |
| STAT: |
YES |
| Turnaround Time |
Stat 90 minutes; Routine 3 hrs |
| Reference Range |
Normal: |
70-159% of Normal |
| Critical: |
<10% of Normal |
| Comments |
- Deliver Immediately
- If more than 2 Factor Assays are ordered: 2 Light Blue Top Tubes need to be drawn.
- Draw tube must be allowed to fill completely.
- Short draws will be rejected.
|
Reviewed by J. Carr on November 19, 2025
