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Updated: Jun 2, 2026

Monitoring the Wall Mechanics During Stent Deployment in a Vessel
08:28

Monitoring the Wall Mechanics During Stent Deployment in a Vessel

Published on: May 8, 2012

Bridging stent-graft pullout force analysis.

Jeffrey Grenville1, Kong T Tan, Leonard W Tse

  • 1Division of Interventional Radiology, Department of Medical Imaging, Toronto General Hospital, Toronto, Ontario, Canada. jgrenvil@med.wayne.edu

Journal of Endovascular Therapy : an Official Journal of the International Society of Endovascular Specialists
|April 28, 2011
PubMed
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Bridging stent-grafts show varied pullout forces, with Viabahn demonstrating strong performance. These forces are crucial for preventing type III endoleaks in complex endovascular repairs.

Area of Science:

  • Vascular Surgery
  • Endovascular Repair
  • Biomaterials Science

Background:

  • Complex endovascular repairs often involve fenestrated and branched stent-grafts.
  • Type III endoleaks can occur due to graft migration or dislodgement.
  • Bridging stent-grafts are used to secure branches in these complex repairs.

Purpose of the Study:

  • To assess and compare the pullout forces (POF) of various bridging stent-grafts.
  • To evaluate stent-grafts used in thoracoabdominal and iliac bifurcated grafts.

Main Methods:

  • Experimental measurement of POF for different stent-graft models (Viabahn, Fluency, i-Cast, with/without Zilver stent).
  • Deployment into renal, celiac, and internal iliac branches of Zenith and iliac bifurcated grafts.
  • At least 10 trials per stent in air at room temperature.

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Main Results:

  • Significant differences in POF were observed among stent-grafts across different branch sizes (renal, celiac, internal iliac).
  • Viabahn and Viabahn with Zilver stent generally exhibited higher POFs compared to Fluency alone.
  • Specific POF values varied by stent type, size, and the specific graft branch.

Conclusions:

  • A small but significant difference exists in the pullout forces of various bridging stent-grafts.
  • POF is a potential factor contributing to type III endoleaks in complex endovascular repairs.
  • Viabahn stent-graft shows theoretical advantages for minimizing branch dislocations in these procedures.