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Factor XI, Activity
0030110
Ordering Recommendation

Order to diagnose factor XI deficiency (hemophilia C).

Mnemonic
F11
Methodology
Electromagnetic Mechanical Clot Detection
Performed
Mon-Sat
Reported
1-3 days
New York DOH Approval Status
This test is New York DOH approved.
Submit With Order
ARUP Consult®
Disease Topics
Specimen Required
Patient Preparation
 
Collect
Lt. blue (sodium citrate). Refer to Specimen Handling at aruplab.com for hemostasis/thrombosis specimen handling guidelines.  
Specimen Preparation
Transfer 2 mL platelet-poor plasma to an ARUP Standard Transport Tube. (Min: 1 mL)  
Storage/Transport Temperature
CRITICAL FROZEN. Separate specimens must be submitted when multiple tests are ordered.  
Unacceptable Conditions
Serum. EDTA plasma, clotted or hemolyzed specimens.  
Remarks
 
Stability
Ambient: 4 hours; Refrigerated: Unacceptable; 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%
1-5 years: 56-150%
6 years:  52-120%
7-9 years: 70-138%
10-11 years: 66-137%
12-13 years: 68-138%
14-15 years:  57-129%
16-17 years: 65-159%
18 years and older: 56-153%
Interpretive Data


Note
CPT Code(s)
85270
Components
Component Test Code*Component Chart NameLOINC
0030110Factor XI, Activity3226-8
* Component test codes cannot be used to order tests. The information provided here is not sufficient for interface builds; for a complete test mix, please click the sidebar link to access the Interface Map.
Aliases
  • Antihemophilic Factor C
  • Coagulation Factor XI Activity Assay, Plasma
  • F11
  • Factor XI Activity Assay
  • Intrinsic Factor Proteins
  • Intrinsic Factors
  • Plasma Thromboplastin Antecedent (PTA)