Chemical etching of Nitinol stents

• Autorzy: Katona B. , Bognar E. , Berta B. , Nagy P. , Hirschberg K.
• Języki publikacji: EN

Abstrakty

EN

At present the main cause of death originates from cardiovascular diseases. Primarily the most frequent cause is vessel closing thus resulting in tissue damage. The stent can help to avoid this. It expands the narrowed vessel section and allows free blood flow. The good surface quality of stents is important. It also must have adequate mechanical characteristics or else it can be damaged which can easily lead to the fracture of the implant. Thus, we have to consider the importance of the surface treatment of these implants. In our experiments the appropriate design was cut from a 1.041 mm inner diameter and 0.100 mm wall thickness nitinol tube by using Nd:YAG laser device. Then, the stent was subjected to chemical etching. By doing so, the burr created during the laser cutting process can be removed and the surface quality refined. In our research, we changed the time of chemical etching and monitored the effects of this parameter. The differently etched stents were subjected to microscopic analysis, mass measurement and in vivo environment tests. The etching times that gave suitable surface and mechanical features were identified.

Słowa kluczowe

EN

stent; nitinol; chemical etching; metallic surface area

PL

stent; nitinol

• Wydawca: Oficyna Wydawnicza Politechniki Wrocławskiej
• Czasopismo: Acta of Bioengineering and Biomechanics
• Rocznik: 2013
• Tom: Vol. 15, no. 4
• Strony: 3--8
• Opis fizyczny: Bibliogr. 22 poz., rys., wykr.

Twórcy

autor

Katona B.

• Department of Materials Science and Engineering, Budapest University of Technology and Economics, Budapest, Hungary

autor

Bognar E.

• Department of Materials Science and Engineering, Budapest University of Technology and Economics, Budapest, Hungary
• MTA–BME Research Group for Composite Science and Technology, Budapest, Hungary

autor

Berta B.

• Heart Center, Semmelweis University, Budapest, Hungary

autor

Nagy P.

• 1 Department of Materials Science and Engineering, Budapest University of Technology and Economics, Budapest, Hungary

autor

Hirschberg K.

• 4 Experimental Laboratory of Cardiac Surgery, University Hospital of Heidelberg, Heidelberg, Germany
• Department of Cardiology, University Hospital of Heidelberg, Heidelberg, Germany

Bibliografia

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