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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.
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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.
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Related Experiment Video

Updated: Jul 1, 2025

A New Hybrid Quantitative Evaluation Model for Axillary Junctional Hemorrhage in Swine

A New Hybrid Quantitative Evaluation Model for Axillary Junctional Hemorrhage in Swine

Published on: December 6, 2024

Changing hemostatic management in post-partum hemorrhage.

Agnès Rigouzzo¹, Pierre-Antoine Froissant¹, Nicolas Louvet¹

¹Anesthesiology Intensive Care Department, Armand Trousseau Hospital, Assistance Publique Hôpitaux de Paris, Paris, France.

American Journal of Hematology

|March 7, 2024

Summary

Rapid point-of-care viscoelastic (VET) assays quickly assess hemostasis in postpartum hemorrhage (PPH). These tests identify low fibrinogen levels, guiding timely treatment to improve patient outcomes.

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Area of Science:

Obstetrics and Gynecology
Hematology
Critical Care Medicine

Background:

Postpartum hemorrhage (PPH) requires prompt hemostasis assessment for effective management.
Fibrinogen levels decrease early in PPH, serving as a key indicator of severity.
Coagulopathy in PPH necessitates rapid diagnostic tools.

Purpose of the Study:

To highlight the importance of early hemostasis assessment in PPH.
To emphasize the role of fibrinogen as an early marker of PPH progression.
To discuss the utility of point-of-care viscoelastic (VET) assays in managing PPH-related coagulopathy.

Main Methods:

Review of current evidence on hemostasis assessment in PPH.
Focus on the application of point-of-care viscoelastic (VET) hemostatic assays.
Analysis of fibrinogen levels as a critical parameter in PPH.

Main Results:

VET assays provide rapid assessment of hemostatic disorders during PPH.
Hypofibrinogenemia is an early and reliable marker of PPH severity.
VET-guided fibrinogen replacement is supported by evidence.

Conclusions:

Early and fast hemostasis assessment is crucial for improving outcomes in PPH.
VET assays are valuable tools for rapid diagnosis and management of PPH coagulopathy.
Further research is needed to establish thresholds for other coagulation parameters.