Fabrication and Evaluation of Nitinol Thin Film Heart Valves

Fabrication and Evaluation of Nitinol Thin Film Heart Valves
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镍钛诺薄膜心脏瓣膜的制造和评估

DOI:
10.1007/s13239-014-0194-6
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发表时间:
2014
影响因子:
1.8
通讯作者:
Quandt E
Quandt E
中科院分区:
工程技术4区
文献类型:
--
作者:
Loger K;Lima de Miranda R;Engel A;Marczynski-Bühlow M;Lutter G;Quandt E

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近年来,新的创新改进了用于经导管心脏瓣膜置换的装置的技术。为了制造用于经导管植入的高效、耐用、血栓形成少且非常薄的心脏瓣膜支架,开发了镍钛合金(NiTi)薄膜的心脏瓣膜小叶。本工作提出了一种用于经导管主动脉瓣置换术的镍钛薄膜瓣叶的制备方法。通过磁控溅射沉积和后续成形工艺,以不同的膜厚(10、15和20µm)制造NiTi瓣膜瓣叶。进行脉动试验以研究收缩期和舒张期的跨瓣压差以及瓣膜的有效瓣口面积。此外,还计算了静水压力下的稳态回流泄漏率。将Edwards Lifescience的两个样本(SAV 19 mm和Perimount Magna 25 mm)作为参考。在这项实验研究中,我们提出了新开发的NiTi瓣叶的第一个体外试验结果。
In recent years new innovations improved the technology of devices for transcatheter heart valve replacement. In order to fabricate an efficient, durable, less thrombogenic and very thin heart valved stent for transcatheter implantation, heart valve leaflets of Nitinol (NiTi) thin film were developed. This work presents a method to fabricate NiTi thin film leaflets for transcatheter aortic valve replacements. NiTi valve leaflets were fabricated in different film thicknesses (10, 15 and 20µm) by magnetron sputter deposition and a subsequent forming process. Pulsatile testing was performed to investigate the transvalvular pressure differences during systole and diastole as well as the effective orifice area of the valves. Furthermore, the steady backflow leakage rate under hydrostatic pressure was evaluated. Two samples from Edwards Lifescience (SAV 19 mm, and Perimount Magna 25 mm) were taken as a reference. In this experimental study, we present firstin vitrotest results of the newly developed NiTi leaflets.
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