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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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Mucosal Bleeding in a Newborn With Low Factor VIII Activity: An Unusual Combination of Type 2A and Type 2N von Willebrand Disease.

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Related Experiment Video

Updated: Apr 19, 2026

The Nijmegen Hemostasis Assay: Simultaneous Fluorogenic Measurement of Thrombin and Plasmin Generation in a Single Well
06:59

The Nijmegen Hemostasis Assay: Simultaneous Fluorogenic Measurement of Thrombin and Plasmin Generation in a Single Well

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Thromboelastography identifies children with rare bleeding disorders and predicts bleeding phenotype.

A N Zia1, M Chitlur, M Rajpurkar

  • 1Division of Hematology/Oncology, University of Texas Southwestern Medical Center, Dallas, Texas.

Haemophilia : the Official Journal of the World Federation of Hemophilia
|December 30, 2014
PubMed
Summary

Thromboelastography (TEG) effectively identifies rare bleeding disorders (RBDs) and correlates with bleeding severity. This global coagulation analysis offers a valuable screening tool for RBDs, often missed by conventional tests.

Keywords:
bleeding phenotypeglobal coagulation assaysinherited coagulation disorders

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Area of Science:

  • Hematology
  • Coagulation Science

Background:

  • Rare bleeding disorders (RBDs) represent 3-5% of congenital bleeding disorders.
  • RBDs can be challenging to diagnose with standard screening tests, showing poor correlation between lab results and bleeding severity.
  • Thromboelastography (TEG) offers a global assessment of blood coagulation.

Purpose of the Study:

  • To assess the utility of TEG as a supplementary diagnostic tool for RBDs.
  • To correlate TEG findings with the clinical bleeding phenotype in RBD patients.

Main Methods:

  • TEG parameters and clot kinetics were analyzed in 26 RBD patients and 30 healthy controls.
  • TEG results were compared against bleeding severity (asymptomatic, mild, moderate, severe).

Main Results:

  • Clot kinetics demonstrated a strong correlation with the presence of RBDs and bleeding severity.
  • Mean maximum rate of thrombus generation (MRTG) was significantly lower in RBD patients (6.0 mm/min) compared to controls (15.4 mm/min).
  • Patients with dysfibrinogenemia and platelet disorders showed distinct TEG patterns with reduced maximum amplitude (MA) and low MRTG.

Conclusions:

  • TEG abnormal clot kinetics were observed in all RBD patients, but none in controls, suggesting its efficacy as a screening test.
  • TEG provides valuable insights into coagulation abnormalities in RBDs, aiding in diagnosis and phenotype correlation.