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Related Concept Videos

Anticoagulant Drugs: Low-Molecular-Weight Heparins01:30

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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...
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Disorders of Hemostasis01:24

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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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Introduction to Hemostasis01:05

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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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Extrinsic and Intrinsic Pathways of Hemostasis01:20

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Blood clotting or coagulation involves extrinsic and intrinsic pathways, which ultimately merge into the common pathway, forming a fibrin clot.
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Formation of the Platelet Plug01:22

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The platelet phase, the second stage of hemostasis, commences around 15-20 seconds after an injury. It follows and overlaps with the vascular phase, during which blood vessels constrict to minimize blood loss.
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Coagulation01:09

Coagulation

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The coagulation phase is a critical part of the body's process to prevent blood loss following injury to blood vessels. It involves chemical reactions that form a clot to seal the injured area. The clotting process begins shortly after injury, within 15-20 seconds for severe damage and 1-2 minutes for minor injuries.
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Related Experiment Video

Updated: Feb 24, 2026

A Microfluidic Flow Chamber Model for Platelet Transfusion and Hemostasis Measures Platelet Deposition and Fibrin Formation in Real-time
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Preanalytical Issues in Hemostasis and Thrombosis Testing.

Giuseppe Lippi1, Emmanuel J Favaloro2

  • 1Section of Clinical Biochemistry, University of Verona, Piazzale LA Scuro, 10, Verona, 37134, Italy. giuseppe.lippi@univr.it.

Methods in Molecular Biology (Clifton, N.J.)
|August 15, 2017
PubMed
Summary

Preanalytical errors significantly impact hemostasis testing quality, affecting diagnosis and treatment. This review highlights critical preanalytical variables to ensure reliable hemostasis and thrombosis test results.

Keywords:
Hemostasis testingPreanalytical issuesPreanalytical variablesThrombosis testing

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Area of Science:

  • Clinical diagnostics
  • Laboratory medicine
  • Hematology

Background:

  • Hemostasis testing is vital for diagnosing and managing hemorrhagic and thrombotic disorders.
  • Ensuring high-quality hemostasis testing requires standardization across all process phases.
  • The preanalytical phase is highly susceptible to errors, contributing up to 70% of diagnostic inaccuracies.

Purpose of the Study:

  • To provide an updated overview of critical preanalytical variables affecting hemostasis and thrombosis testing.
  • To emphasize the importance of quality control in the preanalytical phase of hemostasis diagnostics.

Main Methods:

  • Review of literature on preanalytical variables in hemostasis testing.
  • Identification of key factors impacting sample integrity and test reliability.

Main Results:

  • The preanalytical phase, involving manual processes like sample collection and handling, is the primary source of diagnostic errors.
  • Specific challenges exist for hemostasis testing due to its unique sample requirements (e.g., buffered sodium citrate plasma).
  • Numerous preanalytical variables can compromise the accuracy and reliability of hemostasis test results.

Conclusions:

  • Addressing preanalytical variables is crucial for improving the quality of hemostasis and thrombosis testing.
  • Standardization and monitoring of the preanalytical phase are essential for accurate laboratory diagnostics.
  • Minimizing preanalytical errors ensures reliable patient diagnosis, prognostication, and therapeutic monitoring.