Self-expanding stents based on shape memory alloys and shape memory polymers
Publish place: Journal of Composites and Compounds، Vol: 2، Issue: 3
Publish Year: 1399
نوع سند: مقاله ژورنالی
زبان: English
View: 277
This Paper With 7 Page And PDF Format Ready To Download
- Certificate
- من نویسنده این مقاله هستم
استخراج به نرم افزارهای پژوهشی:
شناسه ملی سند علمی:
JR_JRCC-2-3_007
تاریخ نمایه سازی: 25 تیر 1400
Abstract:
A stenotic vessel can be opened using net-shape tubes called “stents” leading to the restoration of the bloodstream. Compared to the commonly-used stainless steel stent, self-expandable stents have some advantages. They do not suffer from the risks of damage to the vascular tissue due to the balloon expansion. Moreover, overexpansion for compensating the elastic recoil is not needed, and there is no constant force exerted on the artery until the occlusion of the device by the artery stops. However, the stent cannot restore the original dimensions of the vessel in the case of calcified plaques. Self-expandable stents can be utilized for the treatment of atherosclerotic lesions in the carotid, coronary, and peripheral arteries. Shape memory alloys (SMAs), mainly NiTi (nitinol), are employed for self-expandable vascular stent applications. Nitinol is widely applied for medical devices and implants due to its excellent fatigue performance, mechanical properties, and biocompatibility, which make this alloy suitable for long-term installations. Other materials used for self-expandable cardiovascular stents are shape memory polymers (SMPs). Shape memory effect is triggered by the hydration of polymers or temperature change preventing the collapse of small blood vessels. This review has focused on the mechanisms and properties of SMAs and SMPs as promising materials for stent application.©۲۰۱۹ jourcc. All rights reserved.
Keywords:
Authors
Samira Orouji Omid
Nursing Care Research Center, Iran University of Medical Sciences, Tehran, Iran
Zahra Goudarzi
Department of Mining and Metallurgical Engineering, Amirkabir University of Technology, Tehran, Iran
Leila Momeni Kangarshahi
Department of Materials and Metallurgical Engineering, Ferdowsi University of Mashhad, Mashhad, Iran
Ali Mokhtarzade
Department of biomedical engineering, Amirkabir University of Technology, Tehran, Iran
Fateme Bahrami
Department of Physics, Amirkabir University of Technology, Tehran, Iran