Why the study?
Understanding stent expansion characteristics before implantation is essential, as factors such as stent geometry and inflating pressure influence deployment performance.
Curved strut connectors with a small radius of curvature improve the expansion characteristics and performance of coronary stents in computational and in vitro models.
Should not guide stent design or selection; leaves open human trials to assess connector geometry.
Coronary artery stents are tubular structures employed together with angioplasty. Stented angioplasty is a clinical procedure widely applied in the treatment of atherosclerosis to reopen the blocked artery. It is a simple and fast curing minimally invasive clinical procedure. However, it is essential to understand the expansion characteristics of a stent before implantation since the stent geometry, inflating pressure, etc., influence the performance of stents. Finite element analysis and in vitro experiments are simultaneously employed before clinical testing to predict the characteristics during deployment. In this paper, the expansion and deployment characteristics of Meril Osum 2.75 × 24 coronary stent and Envision 3.5 × 28 stent were investigated to study the influence of strut connector on the expansion behaviour of the stent by experimental and computational methods. The current study analyzes the real-time deployment characteristics such as rate of expansion, stress on stent, recoil, dog boning, and foreshortening. The stent expansion characteristics obtained from experiments and simulations were found matching and observed that strut connector has a significant effect on stent expansion. Further, the curved connector of small radius of curvature shows better performance with high patency rate.
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Hashim et al. (2022) studied this question.
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