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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...
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.
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...
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...
Coagulation01:09

Coagulation

The coagulation phase is a critical part of the body's process to prevent blood loss following injury to blood vessels. It involves chemical reactions that form a clot to seal the injured area. The clotting process begins shortly after injury, within 15-20 seconds for severe damage and 1-2 minutes for minor injuries.
During the coagulation phase, clotting factors, or procoagulants, play a vital role in initiating and progressing the coagulation cascade. This cascade is a series of reactions...

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Related Experiment Video

Updated: May 19, 2026

Microfluidics in Assessing Platelet Function
06:47

Microfluidics in Assessing Platelet Function

Published on: November 8, 2024

Platelet function in the postprandial period.

Helmut Sinzinger1, Robert Berent

  • 1Institute for Diagnosis and Treatment of Lipid Disorders and Atherosclerosis (ATHOS), Vienna, Austria. helmut.sinzinger@chello.at.

Thrombosis Journal
|September 5, 2012
PubMed
Summary
This summary is machine-generated.

Postprandial hyperlipidemia does not significantly activate platelet function, based on current tests. Standardized testing requires a fasting period of at least 6 hours for reliable results.

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Procoagulant Platelet Characterization by Measuring Phosphatidylserine Exposure and Microvesicle Release from Human Purified Platelets
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Procoagulant Platelet Characterization by Measuring Phosphatidylserine Exposure and Microvesicle Release from Human Purified Platelets

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Related Experiment Videos

Last Updated: May 19, 2026

Microfluidics in Assessing Platelet Function
06:47

Microfluidics in Assessing Platelet Function

Published on: November 8, 2024

Procoagulant Platelet Characterization by Measuring Phosphatidylserine Exposure and Microvesicle Release from Human Purified Platelets
05:49

Procoagulant Platelet Characterization by Measuring Phosphatidylserine Exposure and Microvesicle Release from Human Purified Platelets

Published on: November 29, 2024

Area of Science:

  • Cardiovascular research
  • Hematology
  • Lipid metabolism

Background:

  • Postprandial hyperlipidemia and hyperglycemia are linked to cardiovascular events.
  • Platelet activation is a potential underlying mechanism.
  • Limited comparative data exists on platelet function tests after a fat meal.

Purpose of the Study:

  • To compare nine platelet function tests in normolipidemic versus hyperlipidemic individuals.
  • To assess test performance at various time points after a fat meal.
  • To evaluate the influence of postprandial hyperlipidemia on platelet activation.

Main Methods:

  • Comparison of nine platelet function tests.
  • Inclusion of normolipidemic and hyperlipidemic subjects.
  • Measurements taken at multiple time intervals post-fat meal.

Main Results:

  • Some tests showed baseline differences, but hyperlipidemia had variable effects.
  • Platelet aggregation tests showed only mild enhancement, not significant changes.
  • Severe hypertriglyceridemia (>400 mg/dl) showed more pronounced, prolonged platelet function changes.
  • Most platelet function tests did not significantly respond to postprandial hyperlipidemia.

Conclusions:

  • Current platelet function tests do not support significant activation in the postprandial period.
  • Fasting duration recommendations vary by test and patient group.
  • Standardization requires consistent timing and a fasting period >6 hours.