Mechanical Evaluation of Unobstructing Magnetic Microactuators for Implantable Ventricular Catheters.
Mechanical Evaluation of Unobstructing Magnetic Microactuators for Implantable Ventricular Catheters.
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DOI：
10.1109/jmems.2014.2321377
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发表时间：
2014-08
期刊：
影响因子：
--
通讯作者：
Judy JW
中科院分区：
文献类型：
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作者：
Lee H;Kolahi K;Bergsneider M;Judy JW
在这里，我们报告了一种新型的无阻碍磁微致动器的发展和评估，用于维持脑积水应用中可植入脑室导管的通畅。脑积水的治疗需要长期植入分流系统，将多余的脑脊液从大脑中分流出去。这些分流系统在植入的第一年有很高的故障率（bbb40 %），通常是由于生物积累。以前，我们已经证明磁性微致动器可以用来去除生物阻塞。本文提出的新型基于悬臂的磁性微致动器改进了以前的扭转设计，使用双晶片来诱导拉伸后的面外挠度，以防止设备在静止时阻塞孔。报告了制造装置的力学评估（即拉伸后挠度，静态和动态响应）并与理论值进行了比较。
Here, we report on the development and evaluation of novel unobstructing magnetic microactuators for maintaining the patency of implantable ventricular catheters used in hydrocephalus application. The treatment of hydrocephalus requires chronic implantation of a shunt system to divert excess cerebrospinal fluid from the brain. These shunt systems suffer from a high failure rate (>40%) within the first year of implantation, often due to biological accumulation. Previously, we have shown that magnetic microactuators can be used to remove biological blockage. The new cantilever-based magnetic microactuator presented in this paper improves upon the previous torsional design using a bimorph to induce a postrelease out-of-plane deflection that will prevent the device from occluding the pore at rest. The mechanical evaluations (i.e., postrelease deflection, static and dynamic responses) of fabricated devices are reported and compared with theoretical values.