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Related Concept Videos

Disorders of Hemostasis01:24

Disorders of Hemostasis

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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.
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Abnormal Proliferation02:23

Abnormal Proliferation

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Under normal conditions, most adult cells remain in a non-proliferative state unless stimulated by internal or external factors to replace lost cells. Abnormal cell proliferation is a condition in which the cell's growth exceeds and is uncoordinated with normal cells. In such situations, cell division persists in the same excessive manner even after cessation of the stimuli, leading to persistent tumors. The tumor arises from the damaged cells that replicate to pass the damage to the...
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Introduction to Hemostasis01:05

Introduction to Hemostasis

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

Extrinsic and Intrinsic Pathways of Hemostasis

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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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Respiratory System Abnormal Finding I: Inspection and Percussion01:30

Respiratory System Abnormal Finding I: Inspection and Percussion

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Respiratory system abnormalities are a significant concern in healthcare due to their potential to indicate underlying severe conditions like Chronic Obstructive Pulmonary Disease (COPD), asthma, and pneumonia. These abnormalities can often be detected through physical examination methods like inspection and percussion.
Inspection Findings
During an inspection, several findings may suggest the presence of respiratory distress or disease. Pursed-lip breathing, where exhalation is slowed by...
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Cardiovascular System Abnormal Findings I: Inspection and Palpation01:29

Cardiovascular System Abnormal Findings I: Inspection and Palpation

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In a cardiovascular examination, inspection and palpation are crucial for identifying abnormalities.
Abnormal findings observed during an inspection
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Related Experiment Video

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A Hepatocellular Cancer Patient&#45;Derived Organoid Xenograft Model to Investigate Impact of Liver Regeneration on Tumor Growth
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[ABNORMALITIES OF HEMOSTASIS IN PATIENTS WITH LIVER CIRRHOSIS].

Matea Majerović, Ana Boban, Marina Premužić

    Lijecnicki Vjesnik
    |August 28, 2018
    PubMed
    Summary

    Liver cirrhosis disrupts the hemostatic system, challenging the old belief of auto-anticoagulation. This review explores the complex balance between bleeding and thrombosis in cirrhosis patients.

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    Area of Science:

    • Hepatology and Hematology
    • Thrombosis and Hemostasis

    Background:

    • Previously, liver cirrhosis patients were thought to be protected from thromboembolic events due to auto-anticoagulation.
    • This paradigm has shifted, revealing complex hemostatic abnormalities in liver cirrhosis.
    • Reduced synthesis of procoagulants and anticoagulants, alongside disproportionate effects on extrahepatic factors, creates a fragile balance.

    Purpose of the Study:

    • To review the mechanisms of hemostatic and fibrinolytic abnormalities in liver cirrhosis.
    • To discuss the incidence of thromboembolic events in this patient population.
    • To explore prophylactic and therapeutic options for managing bleeding and thrombosis.

    Main Methods:

    • Review of existing literature on hemostasis and thrombosis in liver cirrhosis.
    • Analysis of mechanisms underlying hemostatic and fibrinolytic dysregulation.
    • Discussion of clinical challenges in risk assessment and treatment.

    Main Results:

    • Liver cirrhosis involves a rebalanced but fragile hemostatic system, susceptible to bleeding or thrombosis.
    • Conventional laboratory tests are insufficient for accurate bleeding risk evaluation.
    • Prothrombotic risk factors and antithrombotic drug safety in cirrhosis remain poorly understood due to trial exclusions.

    Conclusions:

    • The hemostatic system in liver cirrhosis is complex, influenced by hepatic and extrahepatic factors, hemodynamics, and comorbidities.
    • A multidisciplinary approach involving hepatologists, hematologists, and anesthesiologists is crucial for managing these patients.
    • Further research is needed to identify risk factors and evaluate treatment safety in cirrhotic patients.