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Related Concept Videos

Anticoagulant Drugs: Low-Molecular-Weight Heparins01:30

Anticoagulant Drugs: Low-Molecular-Weight Heparins

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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...
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Coagulation01:06

Coagulation

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Colloidal solids are solid particles suspended in solution. They are usually negatively charged, attracting a compact primary layer of positively charged ions, which attract more counterions to form an electrical double layer. Electrostatic repulsion between the charged double layers prevents the particles from colliding, stabilizing the colloids. These solids are often undesirable because they can contain toxins that are difficult to remove. Coagulation is a technique that helps aggregate and...
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Extrinsic and Intrinsic Pathways of Hemostasis01:20

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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...
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Anticoagulant Drugs: Vitamin K Antagonists and Direct Oral Anticoagulants01:18

Anticoagulant Drugs: Vitamin K Antagonists and Direct Oral Anticoagulants

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Oral anticoagulants are vital tools in preventing and treating blood clotting disorders. This diverse class of medications can be categorized as vitamin K antagonists, exemplified by warfarin, and direct thrombin inhibitors (DTIs), such as dabigatran, as well as factor Xa inhibitors, including rivaroxaban.
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...
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Related Experiment Video

Updated: Sep 30, 2025

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

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A Rational Approach to Coagulation Testing.

Maximo James Marin1, Neil Harris1, William Winter1

  • 1Department of Pathology, Immunology and Laboratory Medicine, University of Florida, Gainesville, FL, USA.

Laboratory Medicine
|March 14, 2022
PubMed
Summary
This summary is machine-generated.

Selecting the right laboratory tests is crucial for quality patient care. This review guides appropriate coagulation test selection for general patients and those with COVID-19, alongside rational anticoagulant monitoring.

Keywords:
activated partial thomboplastin timecoagulationfibrinogenplatelet countprothrombin timetest selectionviscoelastic testing

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Related Experiment Videos

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

  • Clinical Pathology
  • Hematology
  • Infectious Diseases

Background:

  • Appropriate laboratory test selection is vital for effective patient care.
  • Avoiding irrelevant testing while ensuring pertinent tests are performed is essential.
  • Coagulation disorders can significantly impact patient outcomes.

Purpose of the Study:

  • To outline appropriate coagulation test selection for medical and surgical patients.
  • To detail specific coagulation testing strategies for individuals with COVID-19.
  • To define the rational use of anticoagulant monitoring.

Main Methods:

  • Literature review of coagulation testing guidelines.
  • Analysis of diagnostic approaches for SARS-CoV-2 associated coagulopathy.
  • Review of evidence-based practices for anticoagulant therapy monitoring.

Main Results:

  • Established criteria for selecting coagulation tests in diverse patient populations.
  • Highlighted unique coagulation profiles and testing needs in COVID-19 patients.
  • Provided recommendations for optimizing anticoagulant monitoring.

Conclusions:

  • Judicious use of coagulation tests improves diagnostic accuracy and patient management.
  • Tailored coagulation testing is necessary for patients with COVID-19.
  • Rational anticoagulant monitoring enhances therapeutic efficacy and safety.