
SMA形状记忆合金 - 在三类医疗器械中的应用 - 知乎
镍钛诺不寻常的弹性滞后作用允许作用在血管壁上的支架的持续打开力,即慢性向外力 (cof),即使在支架发生大变形和超大尺寸时也能保持非常低。 同时,支架产生的抵抗压缩的力,即径向 …
Understanding the requirements of self-expandable stents for …
Apr 1, 2017 · The terms chronic outward force (COF) and radial resistive force (RRF) have been coined by Duerig to describe the specific characteristics of nitinol stents (Duerig et al., 2000). …
超弹性镍钛合金支架的有限元分析和实验评估_材料_模型_应变
Apr 7, 2023 · rrf(径向阻力)和cof(慢性向外力)是镍钛合金超弹性支架特有的重要机械反应。 RRF是支架产生的抵抗其直径缩小的力,COF是支架从小直径向大直径自我膨胀时产生的力。
EUROFLEX镍钛合金材料-超弹性支架设计综述 - 搜狐
Jan 19, 2023 · 这种偏向刚度意味着作用在血管壁上的支架的持续打开力,或“慢性向外力”(cof)通过大变形和超大尺寸保持非常低。同时,支架产生的抵抗压缩的力或“径向阻力”(rrf) …
Effects of material properties on mechanical performance of …
Dec 1, 2012 · Results show that Nitinol stents with higher A f temperature have low COF, high RRF and large transformation strain. These are related to the greater martensitic phase …
CEC 2019|孙建明:低COF薄壁支架在股腘病变中的应用体会
Mar 2, 2019 · COF(Chronic outward force,慢性外向扩张力)定义为:支架对血管壁的持续作用力。 其影响因素包括:支架相对于目标血管的放大直径与支架自身的硬度。 下文以Pulsar-18 …
微创血管内治疗的镍钛合金支架:材料、设计和性能
Aug 18, 2023 · 径向阻力(rrf)和慢性向外力(cof)是决定血管壁与支架之间力平衡的两个主要特性。 RRF 是衡量径向压缩支架所需的力的大小,而 COF 则是衡量支架在展开构型时向外投 …
The terms chronic outward force (COF) and radial resistive force (RRF) have been coined by Duerig to describe the specific character-istics of nitinol stents (Duerig et...
Portico™ 经导管瓣膜由超弹性镍钛合金管制成 - 知乎
支架径向力的两个组成部分——径向阻力 (RRF) 和慢性向外径向力 (COF)——均在性能方面得到增强。RRF 经过优化,可在室温下加载 Portico 瓣膜,并可在体温下重新鞘合。此外,还增强了 …
Concept of radial resistive force (RRF) - ResearchGate
Once the stent is deployed it exerts a continuous force upon the vascular wall, termed chronic outward force (COF). Animal studies have found an increased neointimal hyperplasia in stents …
- Some results have been removed