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Related Concept Videos

Aneurysm II: Clinical Manifestations and Diagnostic Studies01:21

Aneurysm II: Clinical Manifestations and Diagnostic Studies

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Thoracic, aortic arch and abdominal aneurysms are significant vascular conditions that can present with various clinical manifestations and lead to serious complications. Understanding these manifestations and the appropriate diagnostic studies is essential for effective management and treatment.Thoracic Aortic AneurysmsThoracic aortic aneurysms often remain asymptomatic until they reach a size that impinges on adjacent structures. They typically cause deep, diffuse chest pain that radiates to...
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Related Experiment Video

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Manufacturing Abdominal Aorta Hydrogel Tissue-Mimicking Phantoms for Ultrasound Elastography Validation
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A non-invasive methodology for ATAA rupture risk estimation.

O Trabelsi1, M Gutierrez1, S Farzaneh1

  • 1Mines Saint-Étienne, CIS-EMSE, F-42023 Saint-Étienne, France; INSERM, U1059, SAINBIOSE, F-42023 Saint-Étienne, France; Université de Lyon, F-69000 Lyon, France.

Journal of Biomechanics
|November 29, 2017
PubMed
Summary

Ascending thoracic aortic aneurysms (ATAA) rupture is unpredictable. New methods correlating in vitro stretch with in vivo stiffness may improve rupture risk prediction for ATAA patients.

Keywords:
Ascending thoracic aortic aneurysmBrittlenessMaterial propertyRisk of rupture

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Area of Science:

  • Cardiovascular Research
  • Biomedical Engineering
  • Medical Imaging

Background:

  • Ascending thoracic aortic aneurysms (ATAA) pose a significant risk of fatal rupture or dissection.
  • Aneurysm diameter alone is an insufficient predictor of rupture, highlighting the need for alternative risk assessment factors.

Purpose of the Study:

  • To develop and validate a novel approach for predicting ATAA rupture risk.
  • To investigate the relationship between in vitro mechanical properties and in vivo distensibility of ATAA tissues.

Main Methods:

  • A bulge inflation bench was utilized to test patient-derived ATAA samples.
  • Preoperative dynamic CT scans from 13 patients were analyzed to assess volumetric and cross-sectional distensibility.
  • A failure criterion based on in vitro ultimate stretch was correlated with aortic membrane stiffness.

Main Results:

  • A significant correlation was found between the in vitro ultimate stretch-based failure criteria and the in vivo distensibility-derived aortic membrane stiffness.
  • This suggests that mechanical properties measured in vitro can reflect in vivo biomechanical behavior.

Conclusions:

  • Stretch-based rupture criteria show promise for improving ATAA rupture risk prediction.
  • These findings support the potential for non-invasive clinical assessment of ATAA rupture risk through biomechanical analysis.