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Related Concept Videos

Extrinsic and Intrinsic Pathways of Hemostasis01:20

Extrinsic and Intrinsic Pathways of Hemostasis

Blood clotting or coagulation involves extrinsic and intrinsic pathways, which ultimately merge into the common pathway, forming a fibrin clot.
The Extrinsic Pathway
The extrinsic pathway of coagulation is typically initiated by tissue damage that exposes blood to tissue factor (TF), a protein released by the damaged tissue cells outside the blood vessels—this interaction with TF triggers biochemical reactions involving specific clotting factors. The key player here is Factor VII, which forms a...
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Venous 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...
Hemorrhagic Stroke ll: Pathophysiology01:29

Hemorrhagic Stroke ll: Pathophysiology

A hemorrhagic stroke develops when a cerebral blood vessel ruptures, allowing blood to escape into the surrounding brain tissue, as in intracerebral hemorrhage (ICH), or into the subarachnoid space, as in subarachnoid hemorrhage (SAH). Because the skull is a rigid compartment, the sudden presence of extravascular blood rapidly increases intracranial pressure and compresses adjacent neural structures, leading to immediate tissue injury and impaired cerebral perfusion.Mass Effect and Primary...
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
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Hemorrhagic Stroke l: Introduction01:17

Hemorrhagic Stroke l: Introduction

A hemorrhagic stroke is an acute neurological event that occurs when a weakened cerebral blood vessel ruptures, allowing blood to accumulate within or around the brain. The sudden release of blood forms a focal hematoma that increases intracranial pressure, displaces neural tissue, and can obstruct cerebrospinal fluid pathways. These effects may be compounded by intraventricular extension of the hemorrhage, cerebral edema, or compression of adjacent structures, all of which contribute to...
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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 12, 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

Factor X deficiency presenting with bilateral chronic subdural hematoma.

Senem Senturk1, Ebru Guzel, Aylin Hasanefendioglu Bayrak

  • 1Department of Radiology, Medical School, Dicle University, Diyarbakir, Turkey. snmsenturk@gmail.com

Pediatric Neurosurgery
|June 3, 2010
PubMed
Summary

Factor X deficiency, a rare bleeding disorder, can cause brain bleeds in children. This case highlights imaging of subdural hematomas in an infant with Factor X deficiency, successfully treated with plasma and surgery.

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Determination of the Procoagulant Activity of Extracellular Vesicle (EV) Using EV-Activated Clotting Time (EV-ACT)

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Related Experiment Videos

Last Updated: Jun 12, 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

Determination of the Procoagulant Activity of Extracellular Vesicle (EV) Using EV-Activated Clotting Time (EV-ACT)
04:56

Determination of the Procoagulant Activity of Extracellular Vesicle (EV) Using EV-Activated Clotting Time (EV-ACT)

Published on: August 4, 2023

Area of Science:

  • Pediatric Hematology
  • Diagnostic Imaging
  • Neurology

Background:

  • Factor X deficiency is a rare inherited coagulation disorder.
  • Hemorrhagic complications, including central nervous system hematomas, can occur.
  • Infants and children are particularly vulnerable to these manifestations.

Observation:

  • A 7-month-old male infant presented with hypoactivity and right hemiparesis.
  • Cranial computed tomography (CT) and magnetic resonance (MR) imaging revealed bilateral chronic subdural hematomas.
  • Laboratory results indicated a severe Factor X deficiency (0.7%).

Findings:

  • Imaging demonstrated bilateral chronic subdural hematomas at varying stages of development.
  • The patient had a confirmed diagnosis of severe Factor X deficiency.
  • Successful surgical evacuation of the left-sided hematoma was performed post-plasma replacement.

Implications:

  • This case underscores the importance of considering coagulation disorders in pediatric intracranial hemorrhages.
  • CT and MR imaging are crucial for diagnosing and characterizing subdural hematomas.
  • Prompt diagnosis and treatment, including factor replacement and surgical intervention, lead to favorable outcomes in Factor X deficiency.