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Related Concept Videos

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...
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.
Extrinsic and Intrinsic Pathways of Hemostasis01:20

Extrinsic and Intrinsic Pathways of Hemostasis

Blood clotting or coagulation involves extrinsic and intrinsic pathways, which ultimately merge into the common pathway, forming a fibrin clot.
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 forms a...
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...
Clot Retraction and Fibrinolysis01:16

Clot Retraction and Fibrinolysis

After a fibrin clot is formed, the next step is clot retraction, a vital process facilitated by platelet contractile proteins, such as actin and myosin. These proteins pull the fibrin strands closer together and condense the clot. This action reduces the size of the clot, creating a smaller, denser structure that effectively seals off the damaged vessel. Clot retraction consolidates the clot and helps with wound healing by bringing the edges of the damaged blood vessel closer together.

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Related Experiment Video

Updated: Jun 7, 2026

Leveraging Turbidity and Thromboelastography for Complementary Clot Characterization
06:28

Leveraging Turbidity and Thromboelastography for Complementary Clot Characterization

Published on: June 4, 2020

Critical factors contributing to the thromboelastography trace.

Stephen G MacDonald1, Roger J Luddington

  • 1Haemostasis Unit, Haematology Department, Addenbrooke's Hospital, Cambridge, United Kingdom.

Seminars in Thrombosis and Hemostasis
|October 28, 2010
PubMed
Summary

Thromboelastography (TEG) analyzes blood

Area of Science:

  • Hemostasis and thrombosis research
  • Point-of-care diagnostics
  • Clinical pathology

Background:

  • Thromboelastography (TEG) provides a graphical and numerical analysis of blood viscoelastic changes.
  • The TEG trace is influenced by cellular components, fibrinogen, coagulation factors, and pharmacological agents.
  • Historically, TEG has guided blood component transfusions, particularly in cardiac and hepatic surgery.

Purpose of the Study:

  • To provide a comprehensive overview of thromboelastography applications.
  • To examine factors influencing TEG trace characteristics.
  • To explore emerging uses in pharmaceutical monitoring and patient screening.

Main Methods:

  • Review of existing literature on thromboelastography.
  • Analysis of factors affecting TEG trace interpretation (preanalytical, analytical, clinical).

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Thrombus Profiling Assay: A Microfluidics-Based Platform for Comprehensively Characterizing Biomechanical Thrombogenesis
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Thrombus Profiling Assay: A Microfluidics-Based Platform for Comprehensively Characterizing Biomechanical Thrombogenesis

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A Microfluidic Flow Chamber Model for Platelet Transfusion and Hemostasis Measures Platelet Deposition and Fibrin Formation in Real-time
09:38

A Microfluidic Flow Chamber Model for Platelet Transfusion and Hemostasis Measures Platelet Deposition and Fibrin Formation in Real-time

Published on: February 14, 2017

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Last Updated: Jun 7, 2026

Leveraging Turbidity and Thromboelastography for Complementary Clot Characterization
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Leveraging Turbidity and Thromboelastography for Complementary Clot Characterization

Published on: June 4, 2020

Thrombus Profiling Assay: A Microfluidics-Based Platform for Comprehensively Characterizing Biomechanical Thrombogenesis
08:50

Thrombus Profiling Assay: A Microfluidics-Based Platform for Comprehensively Characterizing Biomechanical Thrombogenesis

Published on: January 9, 2026

A Microfluidic Flow Chamber Model for Platelet Transfusion and Hemostasis Measures Platelet Deposition and Fibrin Formation in Real-time
09:38

A Microfluidic Flow Chamber Model for Platelet Transfusion and Hemostasis Measures Platelet Deposition and Fibrin Formation in Real-time

Published on: February 14, 2017

  • Discussion of current and novel applications of TEG technology.
  • Main Results:

    • TEG is a versatile tool reflecting the complex hemostatic system.
    • Trace characteristics are sensitive to a wide array of physiological and pathological conditions.
    • TEG's utility is expanding beyond traditional surgical settings.

    Conclusions:

    • Thromboelastography is a valuable point-of-care technology for assessing hemostasis.
    • Understanding influencing factors is crucial for accurate interpretation.
    • New applications in drug monitoring and patient screening show significant promise.