用于主动脉支架的NiTi合金丝材的性能改善

doi:10.3724/SP.J.1077.2011.00979

无机材料学报 ›› 2011, Vol. 26 ›› Issue (9): 979-982.DOI: 10.3724/SP.J.1077.2011.00979

用于主动脉支架的NiTi合金丝材的性能改善

朱清¹, 袁振宇¹, 冯睿²

(1. 微创医疗器械(上海)有限公司, 上海201203; 2. 上海长海医院血管外科, 上海200433)

收稿日期:2010-11-20 修回日期:2011-01-24 出版日期:2011-09-20 网络出版日期:2011-08-19
作者简介:朱清(1981-), 男, 高级工程师. E-mail: zhuq@microport.com
基金资助:
“十一五”国家高技术研究发展计划专题项目 (2006AA02Z4E2)

Performance Improvement of the NiTi Alloy Wire Used for Aortic Stent-graft

ZHU Qing¹, YUAN Zhen-Yu¹, FENG Rui²

(1. MicroPort Medical (Shanghai) Co., Ltd., Shanghai 201203, China; 2. Department of Vascular Surgery, Changhai Hospital, Shanghai 200433, China)

Received:2010-11-20 Revised:2011-01-24 Published:2011-09-20 Online:2011-08-19
Supported by:
“Eleventh Five-Year” National High Technology Research and Development Plan Special Projects (2006AA02Z4E2)

摘要/Abstract

摘要： 为了改善主动脉支架的物理性能和生物相容性, 对支架制备过程中的NiTi合金丝材热处理和电化学抛光过程进行研究. 结果表明, 热处理不仅可以有助于支架段的定型, 而且可以提高丝材机械性能. 热处理温度480℃×7min＋510℃×7min时最为理想, 可以获得较好的物理性能. 电化学抛光可以改善丝材表面质量, 显著提高丝材的疲劳寿命, 并减少附壁血栓形成和内皮增生.

关键词: NiTi合金, 主动脉支架, 热处理, 电化学抛光

Abstract: In order to improve the physical properties and biocompatibility of the aortic stent-graft, the effects of heat treatment and electrochemical polishing on nickel-titanium (NiTi) alloy wire during the stent-graft preparation were studied. It is found that heat treatment could help shaping the stent-graft and enhance the mechanical properties of the NiTi wire. The ideal heat-treatment process is heating at 480℃ and 510℃ for 7 min, respectively. By electrochemical polishing, the surface quality and fatigue life of the wire is highly improved. Meanwhile, electrochemical polishing results in reduction of the possibility of the mural thrombus formation and endothelial hyperplasy.

Key words: NiTi alloy, aortic stent-graft, heat treatment, electrochemical polishing

中图分类号:

TB331

朱清, 袁振宇, 冯睿. 用于主动脉支架的NiTi合金丝材的性能改善[J]. 无机材料学报, 2011, 26(9): 979-982.

ZHU Qing, YUAN Zhen-Yu, FENG Rui. Performance Improvement of the NiTi Alloy Wire Used for Aortic Stent-graft[J]. Journal of Inorganic Materials, 2011, 26(9): 979-982.

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用于主动脉支架的NiTi合金丝材的性能改善

Performance Improvement of the NiTi Alloy Wire Used for Aortic Stent-graft

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