Quantitative surface defect analysis of drug-eluting coronary stents by scanning electron microscopy: coating integrity of the CYPHER® Sirolimus-eluting Coronary Stent

2012 ◽  
Vol 4 (12) ◽  
pp. 3968 ◽  
Author(s):  
Karin M. Balss ◽  
Vladimir Veselov ◽  
Hannah-Qiuhua Li ◽  
Eugena Akerman-Revis ◽  
Judith H. Cohen ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Surface Defect ◽  
Coronary Stents ◽  
Coronary Stent ◽  
Defect Analysis ◽  
Drug Eluting ◽  
Scanning Electron

scholarly journals Effect of Expansion Pressure on the Drug Eluting Coating and the Corrosion Characteristics of Coronary Stents

2018 ◽  
Vol 1 (1) ◽  
pp. 37-40
Author(s):  
Krisztina Horicsányi ◽  
Lilla Asztalos ◽  
Dóra Károly ◽  
Éva Fazakas
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Physiological Effects ◽  
Inflation Pressure ◽  
Corrosion Properties ◽  
Expansion Pressure ◽  
Nominal Pressure ◽  
Drug Eluting ◽  
Stent Coating ◽  
Scanning Electron

Abstract During implantation, stents are delivered in crimped state to the narrowed lesion, where they are expanded to the desired size by the balloon. Due to insufficient size selection or high resistance to plaque, the stent is often widened by the expansion pressure to a level greater than the nominal pressure specified by the manufacturer. Depending on the degree of overpressure, the nominal diameter of the stent may change by several tenths of a millimetre. Numerous studies have dealt with the physiological effects of overexposure and stenogenic stress, but so far no studies have been carried out to investigate the stent coating and corrosion properties of the stent. In our research a widely used drug-eluting, platinum-chromium alloyed steel stent was observed with an inflation pressure of 12 and 18 bar. Scanning electron microscopy revealed lesions of the coating and potentiodynamic tests were performed to determine the corrosion rate.

scholarly journals Coating irregularities of durable polymer-based drug-eluting stents as assessed by scanning electron microscopy

2009 ◽  
Vol 5 (1) ◽  
pp. 157-165 ◽  
Author(s):  
Mounir Basalus ◽  
Marc Ankone ◽  
Gert van Houwelingen ◽  
Frits de Man ◽  
Clemens von Birgelen
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Drug Eluting Stents ◽  
Durable Polymer ◽  
Drug Eluting ◽  
Scanning Electron

Scanning Electron Microscopy Analysis of Luminal Inflammation Induced by Different Types of Coronary Stent in an Animal Model

2011 ◽  
Vol 64 (2) ◽  
pp. 159-162
Author(s):  
Armando Pérez de Prado ◽  
Claudia Pérez-Martínez ◽  
Carlos Cuellas-Ramón ◽  
José M. Gonzalo-Orden ◽  
Marta Regueiro-Purriños ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Animal Model ◽  
Coronary Stent ◽  
Scanning Electron Microscopy Analysis ◽  
Different Types ◽  
Electron Microscopy Analysis ◽  
Microscopy Analysis ◽  
Scanning Electron

Investigation of Coated Coronary Stents

2007 ◽  
Vol 537-538 ◽  
pp. 307-314
Author(s):  
Eszter Bognár ◽  
György Ring ◽  
János Dobránszky
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Atomic Force Microscopy ◽  
Coronary Stents ◽  
Surface Features ◽  
Force Microscopy ◽  
Atomic Force ◽  
Eds Analysis ◽  
Scanning Electron

In this study the main properties of coated coronary stents are shown, such as recoil, foreshortening, surface features and failures and the expansion properties. The types and the effects of active and passive coatings are introduced. The results of our examinations with different coated coronary stents are shown as well. The quality and the changing of the coatings were examined by different methods (stereomicroscopy, atomic force microscopy, scanning electron microscopy and EDS analysis).

Pathogenesis of Human Hair Defects

1974 ◽  
Vol 32 ◽  
pp. 12-13
Author(s):  
P.S. Porter ◽  
T. Aoyagi ◽  
R. Matta
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Human Hair ◽  
Standard Techniques ◽  
Scanning Electron

Using standard techniques of scanning electron microscopy (SEM), over 1000 human hair defects have been studied. In several of the defects, the pathogenesis of the abnormality has been clarified using these techniques. It is the purpose of this paper to present several distinct morphologic abnormalities of hair and to discuss their pathogenesis as elucidated through techniques of scanning electron microscopy.

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