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Related Concept Videos

Disorders of Hemostasis01:24

Disorders of Hemostasis

Hemostasis, the process that stops bleeding after a blood vessel injury, is crucial for maintaining the integrity of the circulatory system. However, disorders of hemostasis can disrupt this delicate balance, leading to either excessive clotting or bleeding. These disorders can be broadly classified into thromboembolic disorders and bleeding disorders.
Thromboembolic Disorders
Two factors primarily cause thromboembolic conditions.
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...
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...
Disorders of Erythrocytes01:27

Disorders of Erythrocytes

Disorders of erythrocytes, or red blood cells (RBCs), include a range of conditions affecting their number, shape, or function.
Erythrocyte disorders can be broadly categorized into two main types: anemic and polycythemic conditions.
A low oxygen-carrying capacity of the blood due to the loss, lower production, or destruction of erythrocytes is termed anemia. Hemorrhagic anemia, for example, occurs when bleeding from an external wound or internal ulcer reduces erythrocyte counts.
On the other...
Anticoagulant Drugs: Low-Molecular-Weight Heparins01:30

Anticoagulant Drugs: Low-Molecular-Weight Heparins

Hemostasis is a crucial process that prevents excessive blood loss from damaged blood vessels. It involves various mechanisms such as vasoconstriction, platelet adhesion and activation, and fibrin formation. The importance of each mechanism depends on the type of vessel injury. In contrast, thrombosis is the abnormal formation of a blood clot within the blood vessels, leading to potential complications if the clot obstructs blood flow. Thrombosis can be caused by increased coagulability of the...

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Related Experiment Video

Updated: Jun 8, 2026

Megakaryocyte Differentiation and Platelet Formation from Human Cord Blood-derived CD34+ Cells
09:46

Megakaryocyte Differentiation and Platelet Formation from Human Cord Blood-derived CD34+ Cells

Published on: December 27, 2017

Platelet disorders in adolescents.

Claire S Philipp1

  • 1University of Medicine and Dentistry of New Jersey-Robert Wood Johnson Medical School, New Brunswick, New Jersey, USA. philipp@umdnj.edu

Journal of Pediatric and Adolescent Gynecology
|September 28, 2010
PubMed
Summary
This summary is machine-generated.

Adolescent bleeding symptoms like heavy periods can signal platelet disorders affecting platelet number or function. Diagnosis involves platelet aggregometry, requiring combined hematologic and gynecologic management.

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Microfluidics in Assessing Platelet Function
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Megakaryocyte Differentiation and Platelet Formation from Human Cord Blood-derived CD34+ Cells
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A Microfluidic Flow Chamber Model for Platelet Transfusion and Hemostasis Measures Platelet Deposition and Fibrin Formation in Real-time
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Microfluidics in Assessing Platelet Function
06:47

Microfluidics in Assessing Platelet Function

Published on: November 8, 2024

Area of Science:

  • Hematology
  • Adolescent Medicine
  • Gynecology

Background:

  • Platelet disorders, encompassing issues with platelet count and function, can manifest with bleeding in adolescents.
  • Menorrhagia is a frequent initial symptom in adolescent females with these conditions.
  • Mucocutaneous bleeding, such as nosebleeds and bruising, is also common, alongside excessive bleeding post-hemostatic challenges.

Purpose of the Study:

  • To summarize the presentation and diagnostic approaches for platelet disorders in adolescents.
  • To highlight the specific challenges in managing menorrhagia in this demographic.
  • To emphasize the multidisciplinary approach needed for effective treatment.

Main Methods:

  • Review of acquired and inherited platelet disorders.
  • Description of common bleeding symptoms in adolescents.
  • Explanation of diagnostic tools, including light transmission platelet aggregometry.
  • Outline of management strategies for menorrhagia.

Main Results:

  • Platelet disorders present with varied bleeding symptoms in adolescents, notably menorrhagia in females.
  • Diagnosis often relies on functional platelet tests like aggregometry.
  • Effective management necessitates integrated hematologic and gynecologic interventions.

Conclusions:

  • Adolescent menorrhagia can be a key indicator of underlying platelet dysfunction.
  • Accurate diagnosis of platelet disorders is crucial for appropriate patient care.
  • A combined medical and surgical approach is essential for managing bleeding complications in adolescents with platelet disorders.