Evaluation of a Shape Memory Alloy Reinforced Annuloplasty Band for Minimally Invasive Mitral Valve Repair
Evaluation of a Shape Memory Alloy Reinforced Annuloplasty Band for Minimally Invasive Mitral Valve Repair
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DOI：
10.1016/j.athoracsur.2009.04.133
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发表时间：
2009-10-01
影响因子：
4.6
通讯作者：
Buckner, Gregory D.
中科院分区：
文献类型：
--
作者：
Purser, Molly F.;Richards, Andrew L.;Buckner, Gregory D.
目的。一项利用猪心脏进行的体外研究评估了一种新型环成形术带，该环成形术带由两相形状记忆合金加固，专门用于微创二尖瓣修复。在其刚性（奥氏体）相中，该带提供与商用半刚性带相同的机械性能。在其柔顺（马氏体）阶段，该带具有足够的柔韧性，可以通过8毫米套管针引入，并且易于在心脏内操作。在刚性阶段，原型带显示出与市售半刚性环相似的机械性能。动态血流测试显示，在减少二尖瓣反流方面没有统计学差异。在其柔性阶段，可以通过一个8毫米的套管针轻松展开，机器人操作并缝合到位。实验结果表明，形状记忆合金增强带在微创二尖瓣修复中可以替代柔性带和半刚性带。（中国胸外科杂志，2009;38:1312-6）(C) 2009由中国胸外科学会主办
Purpose. An in vitro study using explanted porcine hearts was conducted to evaluate a novel annuloplasty band, reinforced with a two-phase, shape memory alloy, designed specifically for minimally invasive mitral valve repair.Description. In its rigid (austenitic) phase, this band provides the same mechanical properties as the commercial semi-rigid bands. In its compliant (martensitic) phase, this band is flexible enough to be introduced through an 8-mm trocar and is easily manipulated within the heart.Evaluation. In its rigid phase, the prototype band displayed similar mechanical properties to commercially available semi-rigid rings. Dynamic flow testing demonstrated no statistical differences in the reduction of mitral valve regurgitation. In its flexible phase, the band was easily deployed through an 8-mm trocar, robotically manipulated and sutured into place.Conclusions. Experimental results suggest that the shape memory alloy reinforced band could be a viable alternative to flexible and semi-rigid bands in minimally invasive mitral valve repair. (Ann Thorac Surg 2009; 88: 1312-6) (C) 2009 by The Society of Thoracic Surgeons