Abstract
Stent conformability, the flexibility of a stent in its expanded state to naturally conform to the vessel wall, is one of remaining issues of percutaneous coronary intervention (PCI) with DES, because any quantitative evaluation method for the conformability has not been established although the stent conformability affects clinical outcomes after PCI with DES. Recently, however, an attempt to perform a quantitative evaluation of the conformability by finite element analysis (FEA) has been started. We reviewed a research paper reporting that considerable differences were observed between the stent designs and stent-induced vessel wall stress analyzed by FEA and discussed the relationship between stent designs and its conformability. In order to design a stent having an excellent conformability in the future, we discussed factors of stent design; number of rings per stent-length, number of the links per ring, shape of link connecting rings and number of crests between links. Viewed in this light, a stent having more rings per stent-length, less links per ring, shaped links and more crests between links can be considered factors for better stent conformability. Based on the assumption, we verified the stent conformability of Kaname CoCr Coronary Stent System, the latest coronary stent in Terumo Corporation.
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