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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...
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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...

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Updated: Jun 1, 2026

Microfluidics in Assessing Platelet Function
06:47

Microfluidics in Assessing Platelet Function

Published on: November 8, 2024

Platelet function following trauma. A multiple electrode aggregometry study.

Cristina Solomon1, Stefan Traintinger, Bernhard Ziegler

  • 1Department of Anaesthesiology and Intensive Care Medicine, AUVA Trauma Centre, Salzburg, Austria.

Thrombosis and Haemostasis
|June 10, 2011
PubMed
Summary
This summary is machine-generated.

Impaired platelet function, even minor decreases, upon emergency room admission for trauma patients is linked to higher mortality. These platelet defects indicate coagulopathy and warrant further investigation for trauma care.

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Area of Science:

  • Hematology
  • Trauma Medicine
  • Coagulation Research

Background:

  • Platelets are crucial for hemostasis and coagulation.
  • Limited data exists on platelet function in trauma patients.
  • Understanding platelet behavior post-trauma is vital for patient outcomes.

Purpose of the Study:

  • To analyze platelet function in trauma patients admitted to the emergency room.
  • To compare platelet function between trauma survivors and non-survivors.
  • To investigate the association between platelet function defects and mortality.

Main Methods:

  • Retrospective analysis of 163 trauma patients.
  • Blood samples analyzed for complete blood counts, standard coagulation tests, and platelet function using multiplate electrode aggregometry (MEA) with ADP, collagen, and TRAP activators.
  • Thromboelastometric assessment of platelet contribution to clot elasticity (ROTEM).

Main Results:

  • Non-survivors had significantly lower median platelet counts compared to survivors.
  • Impaired platelet function, particularly in ADP and TRAP tests, was more frequent in non-survivors.
  • Decreased platelet function upon ER admission correlated with increased mortality in trauma patients.

Conclusions:

  • Minor reductions in platelet function at ER admission are associated with coagulopathy and higher mortality in trauma.
  • Platelet function testing may offer prognostic value in trauma care.
  • Further research is needed to explore the therapeutic role of platelet function management in trauma.