Soft Wearable Pressure Sensors for Beat-to-Beat Blood Pressure Monitoring
Soft Wearable Pressure Sensors for Beat-to-Beat Blood Pressure Monitoring
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DOI：
10.1002/adhm.201900109
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发表时间：
2019-07-01
影响因子：
10
通讯作者：
Khine, Michelle
中科院分区：
文献类型：
--
作者：
Kim, Joshua;Chou, En-Fan;Khine, Michelle
柔性电容式压力传感器采用弹性衬底上起皱的金薄膜作为平行板电极。起皱的结构与聚合物形成了牢固的结合，允许重复的法向力使薄膜变形而不会失败。通过结合支撑对电极的微凸起结构，在弹性介电层内形成气腔，压力灵敏度在高达10 kpa的宽动态范围内进一步提高到0.148 kpa(-1)。压力传感器的宽动态范围和压力灵敏度允许对位于腕部的桡动脉施加的压力进行一致测量。软电容式压力传感器在与FDA批准的测量节拍血压的设备(Clearsight，Edwards Lifesciences，加利福尼亚州欧文)进行测试时，显示出类似的结果。因此，这些使用褶皱薄膜的软压力传感器显示出持续监测节拍血压的相当大的潜力。
Wrinkled gold thin films on elastomeric substrates are used as robust parallel plate electrodes for soft capacitive pressure sensors. The wrinkled structures create a robust integration with the polymer, allowing repeated normal force to deform the thin film without failure. By incorporating microridged structures that support the counter electrodes to create air cavities within the elastomeric dielectric layer, pressure sensitivity is further increased to 0.148 kPa(-1) over a wide dynamic range of up to 10 kPa. The wide dynamic range and pressure sensitivity of the pressure sensor allow for consistent measurements of the pressure exerted by the radial artery located on the wrist. The soft capacitive pressure sensor displays comparable results when tested against an FDA approved device (Clearsight, Edwards Lifesciences, Irvine, CA) measuring beat-to-beat blood pressure. These soft pressure sensors using wrinkled thin films, therefore, illustrate considerable potential to continuously monitor beat-to-beat blood pressure.