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Disorders of Hemostasis

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.

Venous Thrombosis III: Interprofessional Care

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...

Extrinsic and Intrinsic Pathways of Hemostasis

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...

Clot Retraction and Fibrinolysis

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.

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: Jan 9, 2026

Tail Vein Transection Bleeding Model in Fully Anesthetized Hemophilia A Mice

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Published on: September 30, 2021

Recurrent Intramuscular Hematoma Revealing Moderate Congenital Factor XIII Deficiency.

Nada Ben Halima¹, Salma Riahi², Ines Mazlout³

¹Laboratory of Hematology and Blood Bank/Laboratory of Parasitology, Sahloul Hospital, Faculty of Medicine of Sousse, University of Sousse, Sousse, TUN.

|December 2, 2025

Summary

This case report highlights a delayed diagnosis of moderate factor XIII deficiency after postoperative bleeding. Early identification of this rare bleeding disorder is crucial for effective management and better patient outcomes.

Area of Science:

Hematology
Coagulation Disorders
Rare Diseases

Background:

Congenital factor XIII deficiency is a rare bleeding disorder.
Severe deficiency risks life-threatening bleeding.

Keywords:

diagnosis factor xiii hematoma hemorrhage treatment

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Mild/moderate deficiency often presents with delayed or provoked bleeding.