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Related Concept Videos

Disorders of Hemostasis01:24

Disorders of Hemostasis

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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
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Clot Retraction and Fibrinolysis01:16

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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.
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Anticoagulant Drugs: Low-Molecular-Weight Heparins01:30

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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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Venous Thrombosis III: Interprofessional Care01:29

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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...
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Inborn Errors of Metabolism01:20

Inborn Errors of Metabolism

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Phenylketonuria (PKU) is a protein metabolism disorder characterized by high blood levels of the amino acid phenylalanine. This results from a mutation in the gene responsible for phenylalanine hydroxylase, an enzyme that converts phenylalanine into tyrosine. When this enzyme is deficient, phenylalanine builds up in the blood, leading to symptoms such as vomiting, rashes, seizures, growth deficiency, and severe mental retardation. An early diagnosis and a diet restricting phenylalanine intake...
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Venous Thrombosis II: Clinical Manifestations and Diagnostic Studies01:20

Venous Thrombosis II: Clinical Manifestations and Diagnostic Studies

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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...
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Related Experiment Video

Updated: Feb 23, 2026

Measurement of Factor V Activity in Human Plasma Using a Microplate Coagulation Assay
13:08

Measurement of Factor V Activity in Human Plasma Using a Microplate Coagulation Assay

Published on: September 9, 2012

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[Factor V congenital deficiency: about a case].

Saloua Boujrad1, Brahim El Hasbaoui1, Hanae Echahdi1

  • 1Service de Pédiatrie, Hôpital Militaire d'Instruction Mohamed V, Faculté de Médecine et de Pharmacie, Université Mohammed V, Rabat, Maroc.

The Pan African Medical Journal
|September 15, 2017
PubMed
Summary
This summary is machine-generated.

Congenital Factor V deficiency, a rare autosomal-recessive bleeding disorder, impairs thrombin generation. This case highlights the condition in an infant with recurrent nosebleeds.

Keywords:
Factor V congenital deficiencycircumcisionepistaxisfresh frozen plasma

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Area of Science:

  • Hematology
  • Coagulation Disorders
  • Genetics

Background:

  • Factor V deficiency, also known as parahemophilia, is a rare inherited coagulation disorder.
  • It follows an autosomal-recessive inheritance pattern, with homozygous individuals typically exhibiting symptoms.
  • Factor V is crucial for converting prothrombin to thrombin, a key step in blood clotting.

Observation:

  • The study reports a case involving an infant presenting with recurrent epistaxis (nosebleeds).
  • This clinical presentation suggests a potential underlying bleeding diathesis.

Findings:

  • The infant was diagnosed with congenital Factor V deficiency.
  • This deficiency leads to a significant reduction in thrombin generation.
  • Consequently, fibrin formation is delayed, resulting in an increased tendency to bleed.

Implications:

  • Early diagnosis of Factor V deficiency is critical for managing bleeding risks in infants.
  • Understanding the pathophysiology aids in developing targeted therapeutic strategies.
  • This case underscores the importance of recognizing rare bleeding disorders in pediatric patients.