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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.
Venous Thrombosis IV: Nursing Management01:30

Venous Thrombosis IV: Nursing Management

Nursing management begins with a thorough assessment of the patient's health history. Key factors include trauma to veins, peripherally inserted central catheters, varicose veins, recent pregnancy or childbirth, surgery, bacteremia, prolonged bed rest, atrial fibrillation, COPD, heart failure, cancer, coagulation disorders, myocardial infarction, spinal cord injury, stroke, prolonged travel, recent bone fractures, and dehydration. Review medication intake, particularly oral contraceptives,...
Epistaxis01:30

Epistaxis

Epistaxis, or nosebleeds, occurs when small, swollen blood vessels in the nasal mucous membrane rupture. Typically, the anterior septum is the primary site of occurrence.
Etiology
Possible causes of this condition include high blood pressure, trauma, low humidity, upper respiratory tract infections, allergies, foreign bodies, nasal inhalation of corticosteroids or illicit drugs, excessive use of decongestant nasal sprays, facial or nasal surgery, anatomic malformation, tumors, or systemic...
Introduction to Hemostasis01:05

Introduction to Hemostasis

Hemostasis is a complex physiological process that prevents excessive bleeding when a blood vessel is injured. It's crucial for maintaining the integrity of the circulatory system, as it ensures that our blood remains fluid while still within the vascular network and yet clots to prevent blood loss upon vessel injury.
The three phases of hemostasis involve many clotting factors present in plasma and several substances released by platelets and injured tissue cells. It is a fast, localized, and...
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...
Esophageal Varices-II: Clinical Features and Management01:28

Esophageal Varices-II: Clinical Features and Management

Esophageal varices often manifest as gastrointestinal bleeding episodes, presenting symptoms like hematemesis (vomiting of blood), hematochezia (passing fresh blood via the rectum), and melena (black, tarry stools). Other signs can include weight loss, anorexia, abdominal discomfort, jaundice, pruritus, altered mental status, and muscle cramps.
In the initial assessment, a thorough review of the patient's medical history is vital to identify risk factors such as liver disease, alcohol abuse, or...

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Evaluation of the determinants of FVIII/FIX levels, bleeding score, and health-related quality of life in the Canadian hemophilia carriers (CHiC) study.

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Venous Thromboembolism Prophylaxis and Postoperative Outcomes in Persons with Bleeding Disorders Undergoing Major Surgery: A Canadian Pilot Feasibility Study.

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Related Experiment Video

Updated: May 23, 2026

Microfluidics in Assessing Platelet Function
06:47

Microfluidics in Assessing Platelet Function

Published on: November 8, 2024

Why is my patient bleeding or bruising?

Natalia Rydz1, Paula D James

  • 1Department of Pathology and Molecular Medicine, Queen's University, Room 2025, Etherington Hall, Kingston, ON, Canada K7L 3N6.

Hematology/Oncology Clinics of North America
|April 3, 2012
PubMed
Summary

Evaluating bleeding symptoms is complex due to overlap with normal populations and various disorders. Bleeding assessment tools aid in quantifying severity for better diagnosis and individualized patient management.

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Area of Science:

  • Hematology
  • Clinical Diagnostics

Background:

  • Evaluating patients with bleeding symptoms presents diagnostic challenges.
  • Bleeding symptoms are common in the general population, complicating the identification of true bleeding disorders.
  • Conditions like type 1 Von Willebrand disease share symptoms with non-pathological bleeding.

Purpose of the Study:

  • To highlight the difficulties in diagnosing bleeding disorders.
  • To emphasize the utility of bleeding assessment tools in quantifying bleeding severity.
  • To discuss the broad differential diagnosis and management strategies for patients with bleeding symptoms.

Main Methods:

  • Review of clinical presentation and diagnostic challenges in bleeding disorders.
  • Discussion of the role of bleeding assessment tools in objective evaluation.
  • Exploration of the differential diagnosis, including primary hemostasis defects, coagulation deficiencies, and connective tissue disorders.

Main Results:

  • Bleeding symptoms frequently occur in healthy individuals, making differentiation difficult.
  • Bleeding assessment tools improve the objective quantification of bleeding severity.
  • A significant number of patients exhibit bleeding symptoms without an identifiable underlying disorder.

Conclusions:

  • Accurate diagnosis of bleeding disorders requires careful evaluation and objective tools.
  • Bleeding assessment tools are crucial for quantifying bleeding severity and guiding management.
  • Individualized patient management is essential, especially when no specific disorder is identified.