A platinum-chromium steel for cardiovascular stents

被引：92

作者：

O'Brien, Barry J. ^{[1
]}

Stinson, Jon S. ^{[2
]}

Larsen, Steve R. ^{[2
]}

Eppihimer, Michael J. ^{[3
]}

Carroll, William M. ^{[1
]}

机构：

[1] Natl Univ Ireland, Natl Ctr Biomed Engn Sci, Galway, Ireland

[2] Boston Sci Corp, Maple Grove, MN 55311 USA

[3] Boston Sci Corp, Natick, MA 01760 USA

来源：

BIOMATERIALS | 2010年 / 31卷 / 14期

关键词：

Stent; Platinum; Chromium oxide; Endothelialization; STAINLESS-STEEL; TRIAL; IMPLANTATION; PASSIVATION; RESTENOSIS; ALLOYS; SYSTEM;

D O I：

10.1016/j.biomaterials.2010.01.146

中图分类号：

R318 [生物医学工程];

学科分类号：

0831 ;

摘要：

The desire to reduce the strut thickness of cardiovascular stents has driven the development of a new high strength radiopaque alloy, based on additions of platinum to a chromium-rich iron based matrix. This paper reports on initial development of the alloy and the rationale for selection of the composition. Data is presented for tensile and microstructural characterization, surface oxide analysis, corrosion resistance and endothelial cell response of the alloy. The results demonstrate the solid solution strengthening effect of the platinum, with an average yield strength of 480 MPa achieved. The material surface consists of primarily chromium oxide which contributes to the high corrosion resistance observed. The cell assay result suggests that surfaces of this Pt-enhanced alloy endothelialize in a manner comparable to stainless steel. (C) 2010 Elsevier Ltd. All rights reserved.

引用

页码：3755 / 3761

页数：7

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