Related Experiment Video
Updated: Mar 20, 2026

Tail Vein Transection Bleeding Model in Fully Anesthetized Hemophilia A Mice
Published on: September 30, 2021
Low-dose activated factor IX complex concentrates (FEIBA(R) ) for post-operative haemostasis in a patient with high
A Bhave1, A Srivastava1, V Lee1
1Departments of Haematology, Orthopaedics and Clinical Pathology CMC Hospital, Vellore, India.
Abstract:
Replacement therapy in patients with severe haemophilia A is associated with the development of inhibitory antibodies in about 15% [1,2]. The presence of inhibitors of factor VIII greatly complicates and compromises the treatment of these patients because of the lack of any completely satisfactory product to treat them. Haemostatic management for surgery in patients with inhibitors is very difficult. A product frequently used to treat bleeding episodes in such patients is prothrombin complex concentrate (PCC) [3] or its activated derivative (APCC) [4]. Activated recombinant human factor VII is another option [5]. For both these modalities of treatment, there are no laboratory tests that can be used to monitor clinical efficacy [5, 6]. Porcine factor VII is therefore the preferred product for surgery in patients with high-responding factor VIII inhibitors [7]. Unfortunately, none of these products are readily available in most developing countries, including India. We report the management of a patient with high-responding factor VIII inhibitor using low doses of FEIBA(R) (Immuno, Austria) in the post-operative period.
Related Concept Videos
Anticoagulant Drugs: Low-Molecular-Weight Heparins
Venous Thrombosis III: Interprofessional Care
Anticoagulant Drugs: Vitamin K Antagonists and Direct Oral Anticoagulants
Warfarin, a prominent vitamin K antagonist family member, exerts its effect by inhibiting the enzyme VKORC1 (vitamin K epoxide reductase complex 1). By hindering this enzyme, warfarin...
Clot Retraction and Fibrinolysis
Extrinsic and Intrinsic Pathways of Hemostasis
The Extrinsic Pathway
The extrinsic pathway of coagulation is typically initiated by tissue damage that exposes blood to tissue factor (TF), a protein released by the damaged tissue cells outside the blood vessels—this interaction with TF triggers biochemical reactions involving specific clotting factors. The key player here is Factor VII, which...
Introduction to Hemostasis
The three phases of hemostasis involve many clotting factors present in plasma and several substances released by platelets and injured tissue cells. It is a fast, localized,...

