In Vitro Evaluation of Side-Branch Creation in Metal Stents by Balloon Dilatation

David Kirsch, Jorge Lopera, Zhong Qian, Awarat Janchai, Arturo Gonzales, Augusto Brazzini, Wilfrido Castaneda

Research output: Contribution to journalArticle

3 Scopus citations

Abstract

Purpose: To determine the effects of strut mesh dilatation in seven commonly used stents used in interventional radiology. Methods: Dilatation through the strut mesh opening on each stent was made by using balloons to artificially create a side branch in translucent plastic tubing. The stents used in the study included both balloon expandable stents (Palmaz stents, Omnilink, and Express) and self-expandable stents (Symphony, SMART, Memotherm, and Wallstents). Stent diameters tested in this study were 8 mm and 14 mm, except for the Omnilink and Express, which were 8 mm and 12 mm (commercially available up to 10 mm, but were overdilated to 12 mm). Side-branch dilation was made with 4-mm and 6-mm balloons for the 8-mm stents and 6-mm, 8-mm and 12-mm balloons for the 12/14-mm stents. Results: Of the self-expandable stents, the Wallstent demonstrated the greatest dilation and maintenance of enlarged mesh opening after dilatation. Side-branch dilatation of the Memotherm, Symphony, and Smart stents had little effect on the mesh opening. Of the balloon expandable stents, Palmaz stent did not respond to dilatation, resulting in balloon rupture and entrapment. The Omnilink and Express stents exhibited good malleability and progressive spherical enlargement in response to dilatation. Conclusion: The Wallstent was the most suitable self-expandable stent for creation of a side branch. The Memotherm, Symphony, and Smart stents are not amenable to side-branch formation due to their elastic nature. The Palmaz stent should not be used in situations where a creation of side branch is anticipated because of its rigid nature and fixed strut joint, which can lead to balloon entrapment. Both the Omnilink and Express stents can be used when creation of a side branch is planned.

Original languageEnglish (US)
Pages (from-to)380-387
Number of pages8
JournalJournal of Applied Research
Volume3
Issue number4
StatePublished - Sep 1 2003

Keywords

  • Deformation
  • Side-branch dilatation
  • Stent struts

ASJC Scopus subject areas

  • Pharmacology
  • Pharmacology (medical)

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    Kirsch, D., Lopera, J., Qian, Z., Janchai, A., Gonzales, A., Brazzini, A., & Castaneda, W. (2003). In Vitro Evaluation of Side-Branch Creation in Metal Stents by Balloon Dilatation. Journal of Applied Research, 3(4), 380-387.