Implantable Cardiac Kirigami-Inspired Lead-Based Energy Harvester Fabricated by Enhanced Piezoelectric Composite Film.
Implantable Cardiac Kirigami-Inspired Lead-Based Energy Harvester Fabricated by Enhanced Piezoelectric Composite Film.
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DOI：
10.1002/adhm.202002100
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发表时间：
2021-04
影响因子：
10
通讯作者：
Zhang JXJ
中科院分区：
文献类型：
--
作者：
Xu Z;Jin C;Cabe A;Escobedo D;Gruslova A;Jenney S;Closson AB;Dong L;Chen Z;Feldman MD;Zhang JXJ
近年来，利用生物机械能为植入式电子设备（如起搏器）提供动力一直备受关注，因为它取代了传统电池，并提供了一种可持续的能源解决方案。然而，目前直接与内脏相互作用的能量收集技术往往缺乏灵活性和一致性，并且通常需要额外的植入手术，这给患者带来了额外的负担。为了解决这个问题，这里报道了一种受Kirigami启发的能量收集器，它使用压电复合薄膜无缝地集成到起搏器引线中，不仅具有很大的灵活性，而且不需要额外的植入手术。这种以铅为基础的装置可以从心脏扩张收缩引起的铅的复杂运动中收集能量。设计和优化了器件的Kirigami模式，大大提高了器件的灵活性，并通过有限元模拟、机械拉伸测试和能量输出测试进行了验证，器件的输出功率为2.4 μW。最后，一项使用猪模型的体内试验表明，该装置可以直接植入心脏，并产生高达~ 0.7 V的电压。这项工作为设计可为植入式电子设备供电的柔性能量收集器提供了一种新策略。
Harvesting biomechanical energy to power implantable electronics such as pacemakers has been attracting great attention in recent years because it replaces conventional batteries and provides a sustainable energy solution. However, current energy harvesting technologies that directly interact with internal organs often lack flexibility and conformability, and they usually require additional implantation surgeries that impose extra burden to patients. To address this issue, here a Kirigami inspired energy harvester, seamlessly incorporated into the pacemaker lead using piezoelectric composite films is reported, which not only possesses great flexibility but also requires no additional implantation surgeries. This lead-based device allows for harvesting energy from the complex motion of the lead caused by the expansion-contraction of the heart. The device’s Kirigami pattern has been designed and optimized to attain greatly improved flexibility which is validated via finite element method (FEM) simulations, mechanical tensile test and energy output test where the device shows a power output of 2.4 μW. Finally, an in-vivo test using a swine model reveals that the device can be implanted into the heart straightforwardly and generate voltages up to ~ 0.7 V. This work offers a new strategy for designing flexible energy harvesters that power implantable electronics.
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