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Related Concept Videos

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...
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...

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Related Experiment Video

Updated: Jul 4, 2026

A Simple Double Centrifugation Tube Method to Obtain Platelet-rich Plasma from Equine Blood
06:10

A Simple Double Centrifugation Tube Method to Obtain Platelet-rich Plasma from Equine Blood

Published on: August 15, 2025

Platelet rich concentrate: basic science and current clinical applications.

Samir Mehta1, J Tracy Watson

  • 1Department of Orthopaedic Surgery, University of Pennsylvania Health System, Philadelphia, Pennsylvania 19104, USA.samir.mehta@uphs.upenn.edu

Journal of Orthopaedic Trauma
|July 3, 2008
PubMed
Summary
This summary is machine-generated.

Platelet-rich concentrate, a concentration of growth factors, enhances bone and soft tissue healing in orthopaedic injuries. Understanding platelet function is key to optimizing its clinical use for better patient outcomes.

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Characterization of Leukocyte-platelet Rich Fibrin, A Novel Biomaterial
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Characterization of Leukocyte-platelet Rich Fibrin, A Novel Biomaterial

Published on: September 29, 2015

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Last Updated: Jul 4, 2026

A Simple Double Centrifugation Tube Method to Obtain Platelet-rich Plasma from Equine Blood
06:10

A Simple Double Centrifugation Tube Method to Obtain Platelet-rich Plasma from Equine Blood

Published on: August 15, 2025

Characterization of Leukocyte-platelet Rich Fibrin, A Novel Biomaterial
08:14

Characterization of Leukocyte-platelet Rich Fibrin, A Novel Biomaterial

Published on: September 29, 2015

Area of Science:

  • Orthopaedic Surgery
  • Regenerative Medicine
  • Biomaterials

Background:

  • Advances in trauma care and medical management have improved patient survival and life expectancy.
  • Orthopaedic fracture care traditionally relies on mechanical stabilization.
  • Orthobiologics, including platelet-rich concentrate, are increasingly vital for complex orthopaedic injuries.

Purpose of the Study:

  • To explore the role of platelet-rich concentrate in orthopaedic clinical applications.
  • To highlight the potential of platelet-rich plasma in enhancing tissue healing.
  • To emphasize the importance of understanding platelet function for optimal outcomes.

Main Methods:

  • Review of basic science and clinical studies on platelet-rich concentrate.
  • Analysis of platelet components and their role in healing.
  • Discussion of platelet-rich plasma's potential effects on cellular recruitment and proliferation.

Main Results:

  • Platelet-rich concentrate contains growth factors like TGF-beta, VEGF, and PDGF.
  • Supraphysiologic concentrations of autologous platelets can enhance bone and soft tissue healing.
  • Platelet-rich plasma may promote the recruitment and proliferation of tenocytes, stem cells, and endothelial cells.

Conclusions:

  • Platelet-rich concentrate shows promise in enhancing healing for orthopaedic injuries.
  • Further understanding of platelet function is essential for effective clinical application.
  • Optimizing the use of platelet-rich concentrate can lead to improved outcomes in orthopaedic surgery.