Related Experiment Video
Updated: May 29, 2026
06:47
Microfluidics in Assessing Platelet Function
Published on: November 8, 2024
Platelet reactivity in chronic venous insufficiency.
Nicoleta Alexandru1, Adriana Georgescu, Manuela Amuzescu
1Petru Poni, Institute of Macromolecular Chemistry, Iasi, Romania. nicoleta.alexandru@icbp.ro
Clinical Laboratory
|September 6, 2011
Summary
Platelets in chronic venous insufficiency (CVI) are activated, showing shape changes and increased adhesion. This platelet activation may contribute to venous wall dysfunction and the development of CVI.
Area of Science:
- Vascular Biology
- Hematology
- Pathophysiology
Background:
- Chronic venous insufficiency (CVI) is a prevalent condition with significant health implications.
- The precise role of platelets in venous thrombosis development within CVI remains debated.
Purpose of the Study:
- To investigate platelet properties in patients with CVI.
- To examine platelet interaction with the venular endothelium in CVI.
Main Methods:
- Explantation of human peripheral venules from CVI patients and healthy controls.
- Isolation of platelets from blood samples.
- Utilized fluorescence and electron microscopy, and Western-blotting techniques.
Main Results:
- Platelets from CVI patients exhibited activated states compared to controls.
- Observed cellular changes included altered shape and ultrastructure.
- Biochemical analysis revealed enhanced protein levels indicative of alphaIIbbeta3 signaling activation.
- Demonstrated increased platelet adhesion to the venular endothelium.
- Significant ultrastructural modifications were noted in the venular wall cells of CVI patients.
Conclusions:
- Platelets circulate in an activated state in CVI.
- Activated platelets may contribute to venous wall dysfunction.
- Platelet activation is implicated in the pathogenesis of CVI.
More Related Videos
Related Concept Videos
01:22Formation 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...
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...
01:30Venous Thrombosis I: Introduction
Venous thrombosis, the most common disorder of the veins, involves the formation of a thrombus or blood clot associated with vein inflammation. It can be classified as either superficial vein thrombosis or deep vein thrombosis.Superficial Vein Thrombosis: This involves the formation of a thrombus in a superficial vein, usually the greater or lesser saphenous vein. Though less severe than deep vein thrombosis (DVT), SVT can lead to complications if untreated.Deep Vein Thrombosis (DVT): This...
01:20Venous Thrombosis II: Clinical Manifestations and Diagnostic Studies
The key difference between Superficial Vein Thrombosis (SVT) and Deep Vein Thrombosis (DVT) lies in their location and severity.Clinical ManifestationsSVT typically presents with localized pain, tenderness, and redness along the course of a superficial vein, often accompanied by a palpable, cord-like structure under the skin. This condition is usually less dangerous than DVT but can be uncomfortable and may lead to complications such as cellulitis or, rarely, a clot extension into the deep...
01:29Venous Thrombosis III: Interprofessional Care
Venous thrombosis requires effective prevention and treatment strategies to improve patient outcomes and reduce potential complications.Prevention StrategiesHealthcare providers must prioritize preventing venous thromboembolism (VTE) for all adult patients upon admission. Interventions depend on bleeding and thrombosis risk, medical history, current medications, diagnoses, planned procedures, and patient preferences. Patients on bed rest should change positions every two hours and, if not...
01:16Clot 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.
01:27Assessment of the Cardiovascular System III: Palpation
Palpation involves feeling the body to evaluate texture, size, consistency, and tenderness for assessing cardiovascular health. The following steps are organized in a head-to-toe order:
Jugular Venous Pressure (JVP) Measurement
Position the patient at a thirty- to forty-five-degree angle or in a semi-fowler's position. Look for the highest point of pulsation in the internal jugular vein and measure the vertical distance to the angle of Loius or sternal angle. A normal JVP is 3-4 cm above the...
Jugular Venous Pressure (JVP) Measurement
Position the patient at a thirty- to forty-five-degree angle or in a semi-fowler's position. Look for the highest point of pulsation in the internal jugular vein and measure the vertical distance to the angle of Loius or sternal angle. A normal JVP is 3-4 cm above the...