Anticoagulants · Pharmacology

What is the clinical significance of the 'Lupus Anticoagulant' in the context of anticoagulation?

  1. It is a drug that treats Lupus
  2. It is an antibody that prolongs aPTT but increases the risk of thrombosis
  3. It is a specific reversal agent for low-molecular-weight heparin
  4. It is a coagulation factor that increases the anticoagulant effect of Warfarin
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Correct answer: It is an antibody that prolongs aPTT but increases the risk of thrombosis

Despite its name, the Lupus Anticoagulant is prothrombotic. It interferes with phospholipid-dependent clotting tests in the lab (prolonging aPTT), but in the body, it increases the risk of venous and arterial clots.

Difficulty: Medium Question 18 of 20

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