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Disorders of Hemostasis

Disorders of Hemostasis

Hemostasis, the process that stops bleeding after a blood vessel injury, is crucial for maintaining the integrity of the circulatory system. However, disorders of hemostasis can disrupt this delicate balance, leading to either excessive clotting or bleeding. These disorders can be broadly classified into thromboembolic disorders and bleeding disorders.
Thromboembolic Disorders
Two factors primarily cause thromboembolic conditions.

Blood Transfusion and Agglutination

Blood Transfusion and Agglutination

Blood transfusion is a therapeutic measure to restore the blood volume after extensive blood loss due to an accident or a medical procedure. Blood transfusion involves drawing a certain amount of blood from a suitable donor and infusing it into the recipient.
History
The history of blood transfusion dates back to the 17th century, when early attempts were made in animals. In 1818 James Blundell, a British doctor, performed the first successful human blood transfusion. Later in 1900, Karl...

Anticoagulant Drugs: Low-Molecular-Weight Heparins

Anticoagulant Drugs: Low-Molecular-Weight Heparins

Hemostasis is a crucial process that prevents excessive blood loss from damaged blood vessels. It involves various mechanisms such as vasoconstriction, platelet adhesion and activation, and fibrin formation. The importance of each mechanism depends on the type of vessel injury. In contrast, thrombosis is the abnormal formation of a blood clot within the blood vessels, leading to potential complications if the clot obstructs blood flow. Thrombosis can be caused by increased coagulability of the...

Hemorrhagic Stroke l: Introduction

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A hemorrhagic stroke is an acute neurological event that occurs when a weakened cerebral blood vessel ruptures, allowing blood to accumulate within or around the brain. The sudden release of blood forms a focal hematoma that increases intracranial pressure, displaces neural tissue, and can obstruct cerebrospinal fluid pathways. These effects may be compounded by intraventricular extension of the hemorrhage, cerebral edema, or compression of adjacent structures, all of which contribute to...

Rh Blood Group

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Related Experiment Video

Updated: May 17, 2026

Tail Vein Transection Bleeding Model in Fully Anesthetized Hemophilia A Mice

Tail Vein Transection Bleeding Model in Fully Anesthetized Hemophilia A Mice

Published on: September 30, 2021

[Acquired haemophilia A].

P Smejkal¹, A Buliková, G Chlupová

¹Oddeleni klinicke hematologie FN Brno. psmejkal@fnbrno.cz

Vnitrni Lekarstvi

|October 17, 2012

Summary

Acquired haemophilia A, an autoimmune disorder targeting factor VIII, causes severe bleeding. Effective management involves prompt diagnosis, bleeding control with factor concentrates, and immunosuppression to eradicate the inhibitor.

Area of Science:

Autoimmune disorders
Hematology
Immunology

Context:

Acquired haemophilia A (AHA) is a rare, life-threatening autoimmune condition.
Characterized by autoantibodies against coagulation factor VIII (FVIII).
Significant risk of severe, spontaneous bleeding episodes.

Purpose:

To outline current management strategies for acquired haemophilia A.
To discuss diagnostic approaches and therapeutic options.
To review methods for inhibitor eradication and bleeding control.

Summary:

Diagnosis requires prompt identification of FVIII inhibitors.
Bleeding cessation primarily utilizes recombinant factor VIIa (rFVIIa) or activated prothrombin complex concentrate (aPCC).
Immunosuppression with steroids, cyclophosphamide, rituximab, or cyclosporine A aims for inhibitor remission.

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Constitutive and Inducible Systems for Genetic In Vivo Modification of Mouse Hepatocytes Using Hydrodynamic Tail Vein Injection

Constitutive and Inducible Systems for Genetic In Vivo Modification of Mouse Hepatocytes Using Hydrodynamic Tail Vein Injection

Published on: February 2, 2018

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Last Updated: May 17, 2026

Tail Vein Transection Bleeding Model in Fully Anesthetized Hemophilia A Mice

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Published on: September 30, 2021

The Nijmegen Hemostasis Assay: Simultaneous Fluorogenic Measurement of Thrombin and Plasmin Generation in a Single Well

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Constitutive and Inducible Systems for Genetic In Vivo Modification of Mouse Hepatocytes Using Hydrodynamic Tail Vein Injection

Constitutive and Inducible Systems for Genetic In Vivo Modification of Mouse Hepatocytes Using Hydrodynamic Tail Vein Injection

Published on: February 2, 2018

Impact:

Improved patient outcomes through timely intervention and tailored therapy.
Reduced morbidity and mortality associated with severe bleeding.
Potential for enhanced remission rates with combination immunosuppressive therapies.