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Related Concept Videos

Introduction to Hemostasis01:05

Introduction to Hemostasis

17.2K
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,...
17.2K
Extrinsic and Intrinsic Pathways of Hemostasis01:20

Extrinsic and Intrinsic Pathways of Hemostasis

15.5K
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...
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Venous Thrombosis III: Interprofessional Care01:29

Venous Thrombosis III: Interprofessional Care

466
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...
466
Disorders of Hemostasis01:24

Disorders of Hemostasis

2.8K
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.
2.8K
Anticoagulant Drugs: Low-Molecular-Weight Heparins01:30

Anticoagulant Drugs: Low-Molecular-Weight Heparins

2.4K
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...
2.4K
Vascular Spasm01:16

Vascular Spasm

4.8K
The vascular phase, also known as vasospasm, is the initial stage of hemostasis, crucial for preventing excessive bleeding when a blood vessel is injured. After a vessel is cut, nerves in the damaged area trigger pain and other sensory impulses. Simultaneously, the smooth muscles in the vessel wall contract, resulting in a vascular spasm. This contraction reduces the vessel's diameter at the injury site, slowing or stopping blood loss through the vessel wall. Vascular spasms typically last...
4.8K

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Related Experiment Video

Updated: Apr 5, 2026

Application of Hemostatic Devices in Laparoscopic Hepatectomy
04:23

Application of Hemostatic Devices in Laparoscopic Hepatectomy

Published on: April 19, 2022

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Surgery and hemostasis.

Janice W Lawson1, Craig S Kitchens

  • 1aCollege of Medicine, Florida State University bTallahassee Memorial Hospital, Tallahassee cDepartment of Medicine, University of Florida, Gainesville, Florida, USA.

Current Opinion in Hematology
|August 7, 2015
PubMed
Summary
This summary is machine-generated.

Perioperative care balances bleeding and clotting risks. Evidence supports venous thromboembolism (VTE) prophylaxis in surgical patients, even with comorbidities, to prevent major complications.

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Area of Science:

  • Anesthesiology
  • Hematology
  • Surgical Sciences

Background:

  • Surgery and trauma present dual risks of hemorrhage and thrombosis.
  • Managing hemostasis in complex surgical patients requires careful consideration.

Purpose of the Study:

  • To review evidence guiding contemporary perioperative care.
  • To address the balance between hemorrhagic and thrombotic risks in surgery.

Main Methods:

  • Review of available scientific evidence.
  • Analysis of contemporary approaches to perioperative management.

Main Results:

  • Factor-specific products aid congenital hemostatic defects.
  • Venous thromboembolism (VTE) prevention is crucial in hospitalized surgical patients.
  • Antithrombotic prophylaxis demonstrates a favorable risk:benefit ratio for most surgical patients.

Conclusions:

  • Perioperative hemorrhage requires prompt evaluation and intervention.
  • Implementing evidence-based VTE prophylaxis guidelines is essential for surgical patient safety.