SKIN-COUPLED PVDF MICROPHONES FOR NONINVASIVE VASCULAR BLOOD SOUND MONITORING.
SKIN-COUPLED PVDF MICROPHONES FOR NONINVASIVE VASCULAR BLOOD SOUND MONITORING.
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用于无创血管血音监测的皮肤耦合 PVDF 麦克风。
DOI：
10.1109/spmb.2018.8615606
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发表时间：
2018
期刊：
影响因子：
--
通讯作者：
Majerus,S
中科院分区：
文献类型：
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作者：
Panda,B;Chin,S;Mandal,S;Majerus,S
血管通路是血液透析的“阿喀琉斯之踵”，维持高流量特性（通道通畅）是实现有效透析治疗的关键。因此，监测血管通路对于维持长期透析的成功至关重要。在狭窄的情况下，血液声音会发生变化，可以通过数字声像图（pag）来分析血流动力学的变化。我们提出了一种多通道PAG记录传感器，适用于快速，无创血管通路监测。在这里，我们提出了传感器的初步设计和特性，适用于记录皮肤表面的pag。选择了优化的传感器尺寸和衬底材料，以提高灵敏度并提供中性频率响应。最后将传感器的性能与传统听诊器在受控血流狭窄的台式幻影上进行了比较。
Vascular access is the “Achilles Heel” of hemodialysis, as maintaining high flow characteristics (access patency) is critical to achieving efficient dialysis treatment. Thus, monitoring of vascular access is essential for maintaining long-term dialysis success. Blood sounds change in the presence of stenosis and can be analyzed digitally as phonoangiograms (PAGs) to determine changes in hemodynamic flow. We propose a multi-channel PAG recording sensor suitable for rapid, non-invasive vascular access monitoring. Here we present the initial design and characterization of sensors appropriate for recording PAGs from the skin surface. An optimized sensor size and backing material was selected to improve sensitivity and to provide a neutral frequency response. The sensor performance was finally compared with a conventional stethoscope on a controlled blood flow stenosis benchtop phantom.