ARUP's Laboratory Test Directory
| 0030110: Factor XI, Activity |
| Test Mnemonic: F11 | |
|
Methodology: Clotting
Performed: Mon, Wed, Fri Reported: 1-4 days |
| Specimen Required: | |
|
Collect: One 5 mL lt. blue (sodium citrate). Refer to the Hemostasis/Thrombosis Specimens section in the front of this User's Guide for special collection instructions.
Transport: 2 mL platelet-poor plasma (lt. blue, sodium citrate), frozen. (Min: 1 mL) Submit specimen in an ARUP Standard Transport Tube. Pediatric Collection/Transport: 1 mL platelet-poor plasma, frozen. Remarks: CRITICAL FROZEN. Separate specimens must be submitted when multiple tests are ordered. Unacceptable Conditions: Serum. Nonfrozen or hemolyzed specimens. Stability: Ambient: 4 hours; Refrigerated: 4 hours; Frozen: 2 weeks |
|
| Reference Interval: |
|
1-4 days: 10-66% 5-29 days: 23-87% 30-89 days: 27-79% 90-179 days: 41-97% 180-364 days: 38-134% 1-6 years: 56-150% 7-9 years: 70-138% 10-11 years: 63-137% 12-13 years: 65-130% 14-15 years: 57-125% 16-17 years: 64-160% 18 years and older: 56-153% |
| CPT Code(s): | |
| 85270 |