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Anchoring barbs and balloon expandable stents: what is the risk of perforation and failed stent deployment?
Bown, M J; Harrison, G J; How, T V; Brennan, J A; Fisher, R K; Vallabhaneni, S R; McWilliams, R G.
Afiliação
  • Bown MJ; Department of Cardiovascular Sciences, University of Leicester, UK.
Eur J Vasc Endovasc Surg ; 44(3): 327-31, 2012 Sep.
Article em En | MEDLINE | ID: mdl-22819740
ABSTRACT

PURPOSE:

Balloon expandable stents may on occasion be deployed in close proximity to the anchoring barbs of endovascular grafts. The aim of this study was to determine the risk and effect of balloon perforation by anchoring barbs and to assess whether these risks are different if the balloon is protected by a covered stent mounted upon it.

METHODS:

A bench-top model was developed to mimic the penetration of anchoring barbs into the lumen of medium sized blood vessels. The model allowed variation of angle and depth of vessel penetration. Both bare balloons and those with covered stents mounted upon them were tested in the model to determine whether there was a risk of perforation and which factors increased or decreased this risk.

RESULTS:

All combinations of barb angle and depth caused balloon perforation but this was most marked when the barb was placed perpendicular to the long axis of the balloon. When the deployment of covered stents was attempted balloon perforation occurred in some cases but full stent deployment was achieved in all cases where the perforation was in the portion of the balloon covered by the stent. The only situation in which stent deployment failed was where the barb was intentionally placed in the uncovered portion of the balloon. This resulted in only partial deployment of the stent.

CONCLUSIONS:

Balloon rupture is a distinct possibility when deploying balloon-expandable stents in close proximity to anchoring barbs. Care should be taken in this circumstance to ensure that the barb is well away from the uncovered portion of the balloon.
Assuntos

Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Artérias / Falha de Prótese / Prótese Vascular / Stents / Angioplastia com Balão / Implante de Prótese Vascular Tipo de estudo: Etiology_studies / Prognostic_studies / Risk_factors_studies Limite: Humans Idioma: En Revista: Eur J Vasc Endovasc Surg Assunto da revista: ANGIOLOGIA Ano de publicação: 2012 Tipo de documento: Article País de afiliação: Reino Unido

Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Artérias / Falha de Prótese / Prótese Vascular / Stents / Angioplastia com Balão / Implante de Prótese Vascular Tipo de estudo: Etiology_studies / Prognostic_studies / Risk_factors_studies Limite: Humans Idioma: En Revista: Eur J Vasc Endovasc Surg Assunto da revista: ANGIOLOGIA Ano de publicação: 2012 Tipo de documento: Article País de afiliação: Reino Unido