AIMS: To classify and quantify post-expansion irregularities in durable polymer-based coatings of drug-eluting stents (DES). METHODS AND RESULTS: Taxus Liberté, Endeavor Sprint, Endeavor Resolute and Xience V DES (three samples of each) were explored by light microscopy and scanning electron microscopy (SEM) following expansion at 14 atm in water. Incidence and size of irregularities were measured during thorough quantitative examinations of a 360 SEM images. DES types examined showed a significant difference in the incidence of irregularities (p<0.0001; 6.6+/-4.2/image at 60-fold magnification) with typical patterns specific for each DES. All types showed areas with bare metal-aspects, but incidence, shape, and size differed largely: Sprint showed the largest areas. Cracks were only found in Sprint and Resolute, while wrinkles were seen exclusively in Taxus Liberté and Xience V (p<0.0001). The coating of each DES type showed some inhomogeneity of distribution, but the incidence differed (p<0.0001) and was least in Taxus Liberté, which, on the other hand, was the only DES that showed webbing with large bare-metal exposure. CONCLUSIONS: The incidence and size of various coating irregularities on different types of DES varied widely. These data may be considered in ongoing discussions on the differences between DES and may serve as reference to compare novel DES.
AIMS: To classify and quantify post-expansion irregularities in durable polymer-based coatings of drug-eluting stents (DES). METHODS AND RESULTS: Taxus Liberté, Endeavor Sprint, Endeavor Resolute and Xience V DES (three samples of each) were explored by light microscopy and scanning electron microscopy (SEM) following expansion at 14 atm in water. Incidence and size of irregularities were measured during thorough quantitative examinations of a 360 SEM images. DES types examined showed a significant difference in the incidence of irregularities (p<0.0001; 6.6+/-4.2/image at 60-fold magnification) with typical patterns specific for each DES. All types showed areas with bare metal-aspects, but incidence, shape, and size differed largely: Sprint showed the largest areas. Cracks were only found in Sprint and Resolute, while wrinkles were seen exclusively in Taxus Liberté and Xience V (p<0.0001). The coating of each DES type showed some inhomogeneity of distribution, but the incidence differed (p<0.0001) and was least in Taxus Liberté, which, on the other hand, was the only DES that showed webbing with large bare-metal exposure. CONCLUSIONS: The incidence and size of various coating irregularities on different types of DES varied widely. These data may be considered in ongoing discussions on the differences between DES and may serve as reference to compare novel DES.
Authors: M W Z Basalus; K Tandjung; K G van Houwelingen; M G Stoel; F H A F de Man; J W Louwerenburg; S A M Saïd; G C M Linssen; M A W J Kleijne; J van der Palen; J Huisman; P M J Verhorst; C von Birgelen Journal: Neth Heart J Date: 2010-08 Impact factor: 2.380
Authors: Adinarayana Andukuri; IlJae Min; Patrick Hwang; Grant Alexander; Lauren E Marshall; Joel L Berry; Timothy M Wick; Yoon Ki Joung; Young-Sup Yoon; Brigitta C Brott; Dong Keun Han; Ho-Wook Jun Journal: Biofabrication Date: 2014-07-22 Impact factor: 9.954
Authors: David E Kandzari; Pieter C Smits; Michael P Love; Ori Ben-Yehuda; Shmuel Banai; Simon D Robinson; Michael Jonas; Ran Kornowski; Rodrigo Bagur; Andres Iniguez; Haim Danenberg; Robert Feldman; Rajiv Jauhar; Harish Chandna; Manish Parikh; Gidon Y Perlman; Mercedes Balcells; Peter Markham; Melek Ozgu Ozan; Philippe Genereux; Elazer R Edelman; Martin B Leon; Gregg W Stone Journal: Circulation Date: 2017-08-09 Impact factor: 29.690