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首页> 外文期刊>Annals of Biomedical Engineering: The Journal of the Biomedical Engineering Society >A novel shape memory alloy annuloplasty ring for minimally invasive surgery: design, fabrication, and evaluation.
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A novel shape memory alloy annuloplasty ring for minimally invasive surgery: design, fabrication, and evaluation.

机译：一种用于微创手术的新型形状记忆合金瓣环成形术环：设计，制造和评估。

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A novel annuloplasty ring with a shape memory alloy core has been developed to facilitate minimally invasive mitral valve repair. In its activated (austenitic) phase, this prototype ring has comparable mechanical properties to commercial semi-rigid rings. In its pre-activated (martensitic) phase, this ring is flexible enough to be introduced through an 8-mm trocar and easily manipulated with robotic instruments within the confines of a left atrial model. The core is constructed of 0.50 mm diameter NiTi, which is maintained below its martensitic transition temperature (24 degrees C) during deployment and suturing. After suturing, the ring is heated above its austenitic transition temperature (37 degrees C, normal human body temperature) enabling the NiTi core to attain its optimal geometry and stiffness characteristics indefinitely. This article summarizes the design, fabrication, and evaluation of this prototype ring. Experimental results suggest that the NiTi core ring could be a viable alternative to flexible bands in robot-assisted minimally invasive mitral valve repair.
机译：已开发出具有形状记忆合金芯的新型瓣环成形术环，以促进微创二尖瓣修复。在其活化（奥氏体）相中，该原型环具有与商用半刚性环相当的机械性能。在其预激活（马氏体）阶段，该环足够灵活，可以通过8毫米套管针引入，并且可以在左心房模型范围内轻松地通过机器人仪器进行操作。芯部由直径为0.50 mm的NiTi构成，在展开和缝合过程中，其保持在其马氏体转变温度（24摄氏度）以下。缝合后，将环加热到其奥氏体转变温度（37摄氏度，正常人体温度）以上，使NiTi磁芯无限期地达到其最佳几何形状和刚度特性。本文总结了该原型环的设计，制造和评估。实验结果表明，在机器人辅助的微创二尖瓣修复中，NiTi芯环可以替代弹性带。

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