Abstract
In this study the authors show a complex examination method which allow to determine the basic features of stents on one stent as possible.These tests have three big parts as non-destructive tests transforming tests and destructive tests. The non-destructive contains optical microscope, metallographic microscope and scanning electron microscope (SEM) investigations; while the mechanical part contains tests by tensile machine and hardness measurement on the sample. Based on these procedures the recoil the crossing profile the MSA the foreshortening were measured or calculated and the flexibility the trackability the retention and the hardness weremeasured and determined.We also defined the place of the measurement of the X-Ray visibility (radiopacity) and the radial stiffness in the row of tests.In this study we used two commercially available coronary stents for verify the test methods, one of the stents contain a Ta layer for a better X-Ray visibility. Our aim was to define and find the position, depth and the importance of this special layer.This article focuses on the features of stent design that make a specific stent more or less suitable for a particular type of lesion or anatomy.
Highlights
The first generations of stents were made of wire and the appearance was helical spiral or woven wire.The second generations of stents are produced by laser cutting from stainless steel tubes [5, 6]
Many of theengineering considerations in stent design were adopted to improve the global acceptability of the device, rather than making a stent design for a specific type of coronary lesion [9, 10].In clinical practice, the operator must decide which stent is most appropriate for the patient
Stents can be classified according to their mechanism of expansion, their composition, and their design
Summary
S. Food and Drug Administration (FDA)approved the balloon-expandable coronary stent (Fig. 1) for the prevention of restenosis [1]. Food and Drug Administration (FDA)approved the balloon-expandable coronary stent (Fig. 1) for the prevention of restenosis [1] It brings on many changes thedevelopment of the stents has paralleled the evolution of endovascular intervention as a new specialty [2]. The first generations of stents were made of wire and the appearance was helical spiral or woven wire.The second generations of stents are produced by laser cutting from stainless steel tubes [5, 6]. Stents can be classified according to their mechanism of expansion (selfexpanding or balloon expandable), their composition (stainless steel, cobalt-based alloy, tantalum, nitinol, inert coating, active coating, biodegradable, etc.), and their design (mesh structure, coil, slotted tube, ring, multi-design, custom design, etc.). The aim of this work was to determine as many properties of one stent as it possible before and after expansion
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
