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Related Concept Videos

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...
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...

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Related Experiment Video

Updated: May 13, 2026

Microfluidics in Assessing Platelet Function
06:47

Microfluidics in Assessing Platelet Function

Published on: November 8, 2024

Platelet function testing and prediction of procedural bleeding risk.

E L Grove1, R Hossain, R F Storey

  • 1Department of Cardiovascular Science, University of Sheffield, Beech Hill Road, Sheffield, UK.

Thrombosis and Haemostasis
|March 8, 2013
PubMed
Summary
This summary is machine-generated.

Platelet function testing can personalize antiplatelet therapy and predict bleeding risk, especially with drugs like clopidogrel. However, more research is needed to establish its role in guiding patient care and optimizing treatment strategies.

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

Published on: February 14, 2017

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

Related Experiment Videos

Last Updated: May 13, 2026

Microfluidics in Assessing Platelet Function
06:47

Microfluidics in Assessing Platelet Function

Published on: November 8, 2024

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

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

Area of Science:

  • Cardiovascular Medicine
  • Hematology
  • Pharmacology

Background:

  • Platelets are crucial for hemostasis, linking platelet function to bleeding risk.
  • Antiplatelet therapy is widely used but carries a bleeding risk.
  • Individualized antiplatelet therapy guided by platelet function testing (PFT) is a potential strategy.

Purpose of the Study:

  • To evaluate the predictive value of PFT for hemostasis and bleeding risk.
  • To assess the role of PFT in guiding antiplatelet therapy management.
  • To explore the relationship between PFT, antiplatelet drug response, and clinical outcomes.

Main Methods:

  • Review of studies investigating antiplatelet drugs (aspirin, P2Y12 inhibitors) and their effect on platelet function and bleeding.
  • Analysis of studies examining PFT in patients undergoing procedures like coronary artery bypass grafting (CABG) and percutaneous coronary intervention (PCI).
  • Investigation of genetic factors (e.g., CYP2C19 *17 allele) influencing clopidogrel response and bleeding risk.

Main Results:

  • Inhibition of platelet function by antiplatelet drugs increases bleeding risk.
  • PFT may predict bleeding risk in specific contexts, such as post-CABG surgery after clopidogrel discontinuation.
  • Evidence for PFT's ability to predict bleeding risk in PCI is conflicting; genetic factors show variable associations with bleeding risk.

Conclusions:

  • PFT holds potential for tailoring antiplatelet therapy and managing bleeding risk.
  • Current evidence is insufficient to establish routine clinical practice for PFT in antiplatelet therapy management.
  • Large-scale studies are required to define the optimal application of PFT for individual patient care.