The structural response of coronary stents

Williams, Mattthew. (2005). The structural response of coronary stents B.Sc Thesis, School of Engineering, The University of Queensland.

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Author Williams, Mattthew.
Thesis Title The structural response of coronary stents
School, Centre or Institute School of Engineering
Institution The University of Queensland
Publication date 2005
Thesis type B.Sc Thesis
Supervisor Professor. J. Lister
Total pages 85
Language eng
Subjects 0905 Civil Engineering
Formatted abstract

Heart disease is one of the most common causes of death in developed countries. Plaque deposits can accumulate on the walls of the arteries, this blockage restricts blood flow around the body. Traditionally this problem was addressed with invasive surgery that involved a long and uncomfortable recovery time. Coronary Stenting was developed as a non-invasive technique for opening the blockage, and providing on going support to the potential blockage.

The performance of a stent design is assessed with two different criteria, the medical performance and the structural performance. The structural performance of the stent is determined by:

The pressure required for expansion

The pressure it can withstand from the artery

The foreshortening of the stent during expansion

Finite element modelling is the industry standard method for assessing these performance characteristics. Simplifications of the stent geometry are common in this analysis.

The adequacy of these simplifications is assessed in this thesis by comparison against experimental data. A simple analytical analysis method is also compared in order to verify its suitability for this application. The findings from this investigation are presented, along with recommendations for the application of these methods.

The process know as ‘crimping’ is necessary in order for the stent to be restrained onto the balloon, unfortunately this process leaves all stents with an initial geometric imperfection. A study into the effect of stent imperfections is presented. The findings from this study suggest that imperfections in stent geometry could have a significant impact on the stent performance.

Recommendations are also presented for further study into stent deployment. The recommendations cover analysis techniques, experimental techniques and realistic modeling techniques.

Keyword Coronary stents
Heart - Diseases
Additional Notes Civil Engineering CIVL4580 research thesis, October 2005, call number THE18999 disk 2

Document type: Thesis
Collection: UQ Theses (non-RHD) - UQ staff and students only
Citation counts: Google Scholar Search Google Scholar
Created: Thu, 11 Apr 2013, 11:06:59 EST by Mr Yun Xiao on behalf of Scholarly Communication and Digitisation Service