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Related Experiment Videos

Wallgraft endoprosthesis: initial canine evaluation

F M Hussain1, G Kopchok, M Heilbron

  • 1Division of Vascular Surgery, Harbor-University of California at Los Angeles Medical Center, Torrance 90509, USA.

The American Surgeon
|October 9, 1998
PubMed
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The Wallgraft (WG) Endoprosthesis demonstrated accurate deployment and excellent patency in canine aortas. Histology confirmed cell-lining, indicating successful healing of this endoluminal graft.

Area of Science:

  • Biomedical Engineering
  • Vascular Surgery
  • Medical Device Technology

Background:

  • Endoluminal grafts are crucial for treating aortic pathologies.
  • Evaluating the in vivo performance of novel endoprosthetic devices is essential for clinical advancement.

Purpose of the Study:

  • To assess the in vivo deployment accuracy and healing characteristics of the Wallgraft (WG) Endoprosthesis.
  • To evaluate the long-term patency and histological integration of the WG in a canine aorta model.

Main Methods:

  • Twenty-two Wallgraft (WG) Endoprostheses were deployed in canine aortas under fluoroscopic guidance.
  • Devices were assessed using intravascular ultrasound (IVUS), angiography, and histology at multiple time points up to 365 days.
  • Post-deployment balloon dilation was performed to ensure maximum expansion.

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Main Results:

  • Accurate deployment was achieved in 22 of 23 devices, with good apposition and immediate aortic flow.
  • All explanted grafts showed wide patency on IVUS and angiography at all time points.
  • Histological examination at 6 months and 1 year revealed cell-lined lumens with endothelial-like cells.

Conclusions:

  • The Wallgraft (WG) Endoprosthesis is accurately deployable and maintains excellent patency in vivo.
  • Post-deployment balloon expansion did not significantly increase the graft diameter.
  • The WG Endoprosthesis shows promising healing characteristics for endoluminal aortic repair.