A novel shape memory alloy annuloplasty ring for minimally invasive surgery: design, fabrication, and evaluation.
A novel shape memory alloy annuloplasty ring for minimally invasive surgery: design, fabrication, and evaluation.
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DOI：
10.1007/s10439-010-0126-z
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发表时间：
2011-01
影响因子：
3.8
通讯作者：
Buckner, Gregory D.
中科院分区：
文献类型：
--
作者：
Purser, Molly F.;Richards, Andrew L.;Cook, Richard C.;Osborne, Jason A.;Cormier, Denis R.;Buckner, Gregory D.
为便于二尖瓣微创修复术，研制了一种新型形状记忆合金瓣膜成形环。在其激活(奥氏体相)阶段，这种原型环具有与商业半刚性环相当的机械性能。在预激活(马氏相)阶段，这个环足够灵活，可以通过8毫米套管针引入，并可以在左房模型的范围内轻松地使用机器人仪器进行操作。芯子由直径0.50 mm的NiTi构成，在展开和缝合过程中保持在其马氏体转变温度(24°C)以下。缝合后，环被加热到其奥氏体相变温度(37°C，正常人体温度)以上，从而使NiTi芯能够无限期地达到其最佳的几何形状和硬度特性。本文总结了该样机环的设计、制造和评价。实验结果表明，在机器人辅助的二尖瓣微创修复术中，镍钛芯环可能是一种可行的替代软环的方法。
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 °C) during deployment and suturing. After suturing, the ring is heated above its austenitic transition temperature (37 °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.
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影响因子：
6
作者：
Dagum, P;Timek, T;Miller, DC
通讯作者：
Miller, DC
影响因子：
4.6
作者：
DAVID, TE;KOMEDA, M;BURNS, RJ
通讯作者：
BURNS, RJ
影响因子：
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作者：
Felger, JE;Chitwood, R;Holbert, D
通讯作者：
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影响因子：
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作者：
Purser, Molly F.;Richards, Andrew L.;Buckner, Gregory D.
通讯作者：
Buckner, Gregory D.
影响因子：
3.8
作者：
Richards, Andrew L.;Cook, Richard C.;Buckner, Gregory D.
通讯作者：
Buckner, Gregory D.