Shape memory thin film actuator for holding a fine blood vessel
Shape memory thin film actuator for holding a fine blood vessel
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用于固定细血管的形状记忆薄膜致动器
DOI：
10.1016/j.sna.2005.10.031
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发表时间：
2005
期刊：
影响因子：
--
通讯作者：
T. Shibata
中科院分区：
文献类型：
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作者：
T. Sugawara;K. Hirota;M. Watanabe;T. Mineta;E. Makino;S. Toh;T. Shibata
在本文中，我们描述了一种形状记忆合金（SMA）薄膜驱动器，可以保持一个良好的血管脉动监测器。该装置具有两步驱动功能，集成了微型加热器，可以局部加热SMA。采用闪蒸法在牺牲铜衬底上制备了TiNiCu三元形状记忆合金薄膜。相变温度可以被控制为高于人体温度，以便在一系列颗粒的闪蒸期间通过快门的定时操作来安全致动。致动器通过第一次致动牢固地保持血管，并允许在显微手术后进行连续监测。使用后，它可以通过第二次驱动轻松释放血管，并完全移除，无需任何额外的手术侵入。当SMA致动器被10mA的电流加热时，微加热器可以在10s内局部加热SMA致动器超过65°C。
In this paper, we describe a shape memory alloy (SMA) thin film actuator which can hold a fine blood vessel for a pulsation monitor. The device has a function of two-step actuation with integrated micro-heaters which can heat up the SMA locally. The TiNiCu ternary SMA thin film was deposited onto a sacrificial copper substrate by flash evaporation method. Phase transformation temperatures can be controlled to be higher than human body temperature for secure actuation by timed operation of a shutter during flash evaporation of a series of pellets. The actuator holds the vessel securely by the first actuation, and allows continuous monitoring after microsurgery. After using, it can release the blood vessel easily by the second actuation and is removed completely without any additional surgical invasions. The micro-heaters can heat up the SMA actuator over 65°C locally within 10s when it was heated by an electric current of 10mA.