Factor XI Activity
Alternate Names
086314 LC, Antihemophilic Factor C, Thromboplastin Antecedent (PTA)
SoftLab Order Code
FXI
Epic Order Name
FACTOR XI ACTIVITY, REF LAB LC 086314
Epic Order ID
LAB309
Laboratory
Reference lab
Sample Type
Plasma
Collection Container
Blue Top (Sodium Citrate - Light blue)
Collecting Volume
One full light blue tube
Minimum Collecting Volume
One full light blue tube
Storage or Stability
Frozen
Causes for Rejection
Hemolysis, clotted specimen, samples thawed in transit
Patient Preparation
Ideally, the patient should not be on anticoagulant therapy. Avoid warfarin (Coumadin®) therapy for two weeks prior to the test and heparin, direct Xa, and thrombin inhibitor therapies for about three days prior to testing. Do not draw from an arm with a heparin lock or heparinized catheter.