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对多结构血管支架的结构机械和多孔性特征进行比较研究
Yao Lu1, Jingbo Xu2, Songbiao Xue3
1Zhejiang Pharmaceutical University,, Ningbo, 315100, Zhejiang, China. wyly891207@126.com.
Scientific reports
|January 6, 2026
概括
制造工艺显著影响血管支架的特性. 印花脚手架提供优越的机械强度和辐射支,而针织脚手架提供更好的合规性,揭示了关键的过程结构和属性关系.
科学领域:
- 生物材料工程 生物材料工程
- 医疗设备制造业 医疗设备制造业
- 血管组织工程 血管组织工程
背景情况:
- 血管支架的性能是由几何学决定的,但制造过程 (针织,织造,冲压) 提供了对结构参数的分离控制.
- 这些参数对机械性能的系统影响尚不清楚,阻碍了优化脚手架设计.
研究的目的:
- 在统一的框架内系统地比较通过针织,编织和冲压制造的多结构血管支架.
- 为了阐明316L不钢脚手架中"工艺结构-属性"的内在关系.
主要方法:
- 制造了三系列 (S1:针织,S2:织造,S3:印) 的管状脚手架,结构参数各不相同.
- 使用图像分析量化表征毛孔面积,形状 (面积比,圆形) 和金属覆盖.
- 使用电子通用测试机评估轴向压缩,轴向张力和辐射支特性.
主要成果:
- 在制造过程中实现了不同的结构参数,孔隙面积从0.22mm2到5.10mm2.
- 标记式脚手架 (S3) 呈现出异型形孔,而针织 (S1) 和织造 (S2) 脚手架呈现出近同型孔.
- 没有发现孔径大小和金属覆盖之间的直接相关性,证实了参数脱.
- 标记式支架 (S3) 显示出优异的辐射支 (>130 N),抗拉强度 (高达 2447.75 N) 和压力刚度 (高达 135.36 N/mm).
- 针织脚手架 (S1) 的刚度最低 (1.91 N/mm) 且符合要求最高.
- 织造的脚手架 (S2) 显示了中间特性,这些属性根据网格数量有系统的变化.
结论:
- 制造过程是血管支架结构和机械性能的关键决定因素.
- 冲压工艺产生具有高机械强度和辐射支的脚手架,适用于需要坚固支的应用.
- 针织工艺产生符合标准的支架,有利于灵活性,并最大限度地减少应力屏蔽.
- 该研究建立了明确的"过程结构-属性"关系,使得针对特定临床需求量身定制的支架设计成为可能.
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