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Related Concept Videos

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...
Formation of the Platelet Plug01:22

Formation of the Platelet Plug

The platelet phase, the second stage of hemostasis, commences around 15-20 seconds after an injury. It follows and overlaps with the vascular phase, during which blood vessels constrict to minimize blood loss.
As the injured blood vessel contracts, endothelial cells undergo contraction, revealing collagen fibers in the basement membrane and underlying connective tissue. Furthermore, the plasma membrane of endothelial cells becomes adhesive, preparing the site for platelet adhesion. Platelets...
Structure and Function of Platelets01:18

Structure and Function of Platelets

The cell fragments known as platelets are disc-shaped, with an average diameter of about 3 μm and a thickness of roughly 1 μm. They play a crucial role in the body's vascular clotting system, which also involves plasma proteins, blood cells, and blood vessel tissues.
Platelets are continually replenished, circulating in the bloodstream for 9-12 days before being removed by phagocytes, primarily in the spleen. A microliter of circulating blood contains between 150,000 and 450,000 platelets, with...
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...
Peripheral Artery Disease III: Interprofessional Care01:27

Peripheral Artery Disease III: Interprofessional Care

Peripheral Artery Disease (PAD) is characterized by narrowed arteries that diminish blood flow to the extremities. Effective management of PAD requires an interprofessional approach involving various healthcare professionals. The critical aspects of interprofessional care for PAD patients focus on risk factor modification, drug therapy, exercise therapy, nutrition therapy, critical limb ischemia care, and interventional radiology and surgical procedures.The primary treatment goal for PAD...
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: Jul 14, 2026

Dynamic Multiparameter Platelet Function Assessment Using a Capacitive Biosensor
06:32

Dynamic Multiparameter Platelet Function Assessment Using a Capacitive Biosensor

Published on: May 2, 2025

Platelet function and antiplatelet therapy.

M Troxler1, K Dickinson, S Homer-Vanniasinkam

  • 1Leeds Vascular Institute, The General Infirmary at Leeds, Great George Street, Leeds LS1 3EX, UK. maxtrox@supanet.com

The British Journal of Surgery
|May 22, 2007
PubMed
Summary

Platelets are crucial beyond blood clotting, impacting inflammation, immunity, and cancer. Understanding platelet roles is vital for surgical practice and antiplatelet therapy.

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Last Updated: Jul 14, 2026

Dynamic Multiparameter Platelet Function Assessment Using a Capacitive Biosensor
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Published on: September 5, 2016

Area of Science:

  • Hematology
  • Surgical Science
  • Immunology

Background:

  • Platelets are primarily known for hemostasis and thrombosis.
  • Emerging evidence highlights diverse platelet functions beyond coagulation.
  • These functions have significant implications for surgical practice.

Purpose of the Study:

  • To review the pathophysiology of platelets in hemostasis and thrombosis.
  • To explore other clinically relevant roles of platelets.
  • To examine current evidence for antiplatelet therapy.

Main Methods:

  • Conducted a comprehensive literature review using Medline.
  • Included studies on platelet functions in inflammation, atherothrombosis, antimicrobial defense, and tumor growth.
  • Reviewed current clinical evidence regarding antiplatelet therapy.

Main Results:

  • Platelet functions are multifaceted and extend beyond hemostasis.
  • Platelets play roles in inflammatory processes, such as atherothrombosis.
  • Platelets are involved in antimicrobial defense and tumor progression.

Conclusions:

  • Platelet functions are complex and not confined to hemostasis.
  • Growing understanding of platelet pathophysiology is essential for surgical practice.
  • Clinical application of antiplatelet therapy is a key area of relevance.