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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
AgeReference IntervalAgeReference Interval
1-4 days10-66%7-9 years70-138%
5-29 days23-87%10-11 years66-137%
30-89 days27-79%12-13 years68-138%
90-179 days41-97%14-15 years57-129%
180-364 days38-134%16-17 years65-159%
1-5 years56-150%18 years and older56-153%
6 years52-120%

Interpretive Data


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)