Flexible, Structured MWCNT/PDMS Sensor for Chronic Vascular Access Monitoring.
Flexible, Structured MWCNT/PDMS Sensor for Chronic Vascular Access Monitoring.
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用于慢性血管通路监测的灵活、结构化 MWCNT/PDMS 传感器。
DOI：
10.1109/icsens.2016.7808630
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发表时间：
2016
期刊：
影响因子：
--
通讯作者：
Bogie,KathM
中科院分区：
文献类型：
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作者：
Majerus,SteveJA;Dunning,Jeremy;Potkay,JosephA;Bogie,KathM
移植物壁脉动幅度感测可以提供功能状态的测量，例如在血液透析通路移植物中。目前的植入式移植物监测传感器需要移植物修饰和直接血流接触。我们提出了一类新的压阻式柔性脉动传感器，它可以缠绕在移植物周围来测量壁运动。这些传感器必须高度柔性以防止移植物收缩;典型的应变传感器太刚性，并且应变感测范围对于该应用来说太有限。我们描述了一种用于打印具有内部多孔结构的聚二甲基硅氧烷（PDMS）的新型增材制造（AM）方法，使得可以针对给定的传感器几何形状各向异性地调整材料顺应性。原型柔性脉动传感器（FPS）组成的结构PDMS与嵌入式导电PDMS传感器层的制造和测试。初始测试表明，传感器对20%的1 Hz循环伸长率的响应可靠，传感器应变系数为1.0。
Graft wall pulsation amplitude sensing can provide a measure of functional status, e.g. in hemodialysis access grafts. Current implantable graft monitoring sensors require graft modification and direct bloodstream contact. We propose a new class of piezoresistive flexible pulsation sensors which can be wrapped around the graft to measure wall movement. These sensors must be highly flexible to prevent graft constriction; typical strain sensors are too rigid and the strain sensing range is too limited for this application. We describe a novel additive manufacturing (AM) method for printing polydimethylsiloxane (PDMS) with an internal porous structure, such that material compliance may be tuned anisotropically for a given sensor geometry. Prototype flexible pulsation sensors (FPS) consisting of structured PDMS with an embedded conductive PDMS sensor layer were fabricated and tested. Initial tests demonstrated reliable sensor response to 1-Hz cyclic elongation of 20%, and a sensor gauge factor of 1.0.