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Related Concept Videos

Anticoagulant Drugs: Low-Molecular-Weight Heparins01:30

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...
Venous Thrombosis III: Interprofessional Care01:29

Venous Thrombosis III: Interprofessional Care

Venous thrombosis requires effective prevention and treatment strategies to improve patient outcomes and reduce potential complications.Prevention StrategiesHealthcare providers must prioritize preventing venous thromboembolism (VTE) for all adult patients upon admission. Interventions depend on bleeding and thrombosis risk, medical history, current medications, diagnoses, planned procedures, and patient preferences. Patients on bed rest should change positions every two hours and, if not...
Disorders of Hemostasis01:24

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.
Introduction to Hemostasis01:05

Introduction to Hemostasis

Hemostasis is a complex physiological process that prevents excessive bleeding when a blood vessel is injured. It's crucial for maintaining the integrity of the circulatory system, as it ensures that our blood remains fluid while still within the vascular network and yet clots to prevent blood loss upon vessel injury.
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, and...
Antiplatelet Drugs: Prostaglandin Synthesis, P2Y12 and Glycoprotein IIb/IIIa Inhibitors01:20

Antiplatelet Drugs: Prostaglandin Synthesis, P2Y12 and Glycoprotein IIb/IIIa Inhibitors

Antiplatelet drugs emerge as frontline defenders against the insidious threat of thromboembolic diseases, where abnormal clots obstruct vital blood vessels. These drugs stand as bulwarks, inhibiting platelet aggregation and clot formation, thereby mitigating the risk of life-threatening conditions like myocardial infarction, coronary artery disease, and thrombotic strokes.
Prostaglandin synthesis inhibitors, exemplified by the widely known aspirin, wield their power by irreversibly acetylating...
Venous Thrombosis I: Introduction01:30

Venous Thrombosis I: Introduction

Venous thrombosis, the most common disorder of the veins, involves the formation of a thrombus or blood clot associated with vein inflammation. It can be classified as either superficial vein thrombosis or deep vein thrombosis.Superficial Vein Thrombosis: This involves the formation of a thrombus in a superficial vein, usually the greater or lesser saphenous vein. Though less severe than deep vein thrombosis (DVT), SVT can lead to complications if untreated.Deep Vein Thrombosis (DVT): This...

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Related Experiment Video

Updated: Jun 18, 2026

Rapid Point-of-Care Assay of Enoxaparin Anticoagulant Efficacy in Whole Blood
11:17

Rapid Point-of-Care Assay of Enoxaparin Anticoagulant Efficacy in Whole Blood

Published on: October 12, 2012

[Heparin-induced thrombocytopenia].

Ch Baccus1, P Hans, J F Brichant

  • 1Service d'Anesthésie-Réanimation, CHU de Liège, Belgique. c.baccus@skynet.be

Revue Medicale De Liege
|December 2, 2009
PubMed
Summary

Heparin-induced thrombocytopenia (HIT) is a rare but severe immune complication of heparin therapy. Early diagnosis and prompt treatment are crucial for reducing patient morbidity and mortality.

Area of Science:

  • Hematology
  • Immunology
  • Pharmacology

Context:

  • Heparin therapy can lead to heparin-induced thrombocytopenia (HIT), a serious complication.
  • HIT is more common with unfractionated heparin than low molecular weight heparin.
  • It can cause severe thromboembolic and hemorrhagic events.

Purpose:

  • To describe the two types of HIT: Type I (non-immunologic) and Type II (immunologic).
  • To highlight the diagnostic criteria and management of Type II HIT.
  • To emphasize the importance of early diagnosis and treatment.

Summary:

  • Type I HIT is non-immunologic, asymptomatic, and resolves upon heparin cessation.
  • Type II HIT is immunologic, involving IgG antibodies against the heparin-platelet factor 4 complex, leading to platelet activation and thrombocytopenia.

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A Uniform Shear Assay for Human Platelet and Cell Surface Receptors via Cone-plate Viscometry
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Last Updated: Jun 18, 2026

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Published on: October 12, 2012

Comprehensive Analysis of Procoagulant Platelets Exhibiting Features of Necrosis, Apoptosis and Platelet Activation
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Comprehensive Analysis of Procoagulant Platelets Exhibiting Features of Necrosis, Apoptosis and Platelet Activation

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A Uniform Shear Assay for Human Platelet and Cell Surface Receptors via Cone-plate Viscometry

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  • Diagnosis involves excluding other causes and confirming anti-PF4 antibodies; treatment requires stopping heparin and initiating alternative anticoagulation.

    • Impact:

    • Prompt diagnosis and management of HIT significantly reduce associated morbidity and mortality.
    • Understanding HIT's mechanisms aids in developing safer anticoagulation strategies.
    • This knowledge supports clinical decision-making in patients receiving heparin.