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Related Concept Videos

Aneurysm III: Interprofessional Care01:26

Aneurysm III: Interprofessional Care

54
Aneurysm management involves either conservative medical therapy or surgical intervention, depending on the size and symptoms of the aneurysm. Conservative management is generally reserved for smaller, asymptomatic aneurysms, while larger or symptomatic aneurysms often necessitate surgical repair.Conservative Medical TherapyFor small, asymptomatic aneurysms, particularly abdominal aortic aneurysms (AAA) less than 5.5 centimeters in diameter, conservative medical therapy is recommended. This...
54

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Degradation Phenomena on "Homemade" Explanted Aortic Textile Endografts.

Sheng-Heng Cao1, Jennifer Canonge1, Julien Gaudric1,2

  • 1Groupe Européen de Recherche sur les Prothèses Appliquées à la Chirurgie Vasculaire, Strasbourg, France.

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Summary

Homemade endografts (EGs) used in endovascular abdominal aortic repair (EVAR) showed significant degradation over time. Explant analysis revealed fabric tears, broken stitches, and stent corrosion, highlighting the risks of using non-standardized materials for aortic repair.

Keywords:
Aortic endograftsDegradationPolyesterStentTextile

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Area of Science:

  • Biomaterials Science
  • Vascular Surgery
  • Medical Device Engineering

Background:

  • Homemade endografts (EGs) were developed in the 1990s for endovascular abdominal aortic repair (EVAR) using commercially available materials.
  • The long-term durability and aging characteristics of these devices were not well understood.

Purpose of the Study:

  • To analyze the aging phenomena of homemade endografts (EGs) through explant analysis.
  • To identify the mechanisms of degradation in textile EGs used for EVAR.

Main Methods:

  • Analysis of five explanted homemade EGs (implanted for 56-202 months).
  • Assessment included visual, microscopic, and endoscopic examinations following ISO 9001/13485 standards.
  • Evaluation focused on fabric cover, stitch filament, and stent integrity.

Main Results:

  • Explantation reasons included endoleak (3 cases) and aneurysm sac growth (2 cases).
  • Sixty-three percent of fabric lesions resulted from abrasion between fabric and stents.
  • Observed defects included broken stitches (up to 33%), suture rupture, and stent corrosion.

Conclusions:

  • Homemade textile EGs exhibit various aging phenomena, including fabric tears and holes due to abrasion.
  • Stitch ruptures and stent detachment contribute to device deformation and degradation.
  • Findings underscore the risks associated with non-standardized materials in endovascular aortic repair.