Related Experiment Video
Updated: Dec 10, 2025
06:47
Microfluidics in Assessing Platelet Function
Published on: November 8, 2024
1.4K
Hemostatic abnormalities in COVID-19: A guided review
1Programa de Pós-graduação em Ciências Farmacêuticas, Universidade Federal do Rio de Janeiro, Rio de Janeiro, RJ, Brazil.
Anais Da Academia Brasileira De Ciencias
|August 27, 2020
Summary
This review explores how COVID-19 (Coronavirus Disease 2019) disrupts blood clotting, leading to hypercoagulability and bleeding risks. Understanding these hemostatic changes is crucial for managing severe cases.
Area of Science:
- Infectious Diseases
- Hematology
- Pathophysiology
Background:
- Severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) has caused a global pandemic.
- Hemostatic disorders are increasingly recognized in patients with Coronavirus Disease 2019 (COVID-19).
Purpose of the Study:
- To review the pathophysiological mechanisms underlying hemostatic changes in COVID-19.
- To correlate infection dynamics with observed coagulation abnormalities.
Main Methods:
- Literature review of studies on COVID-19 and hemostasis.
- Analysis of reported clinical and laboratory findings in COVID-19 patients.
Main Results:
- COVID-19 patients exhibit prolonged prothrombin time (PT) and activated partial thromboplastin time (APTT).
- Elevated D-dimer, reduced antithrombin (AT) activity, and thrombocytopenia are common.
- Downregulation of angiotensin-converting enzyme 2 (ACE2) and cytokine storm are linked to hypercoagulability.
Conclusions:
- COVID-19 triggers complex hemostatic alterations, including hypercoagulability and hyperfibrinolysis.
- Understanding these mechanisms is vital for clinical management and therapeutic strategies.
Related Concept Videos
01:24Disorders of Hemostasis
1.7K
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.
Thromboembolic Disorders
Two factors primarily cause thromboembolic conditions.
1.7K
01:30Anticoagulant Drugs: Low-Molecular-Weight Heparins
1.4K
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...
1.4K
01:20Extrinsic and Intrinsic Pathways of Hemostasis
11.2K
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...
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...
11.2K
01:30Venous Thrombosis IV: Nursing Management
128
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,...
128
01:05Introduction to Hemostasis
12.2K
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,...
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,...
12.2K
01:29Venous Thrombosis III: Interprofessional Care
177
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...
177