Effects of Bio-Impedance Sensor Placement Relative to the Arterial Sites for Capturing Hemodynamic Parameters.
Effects of Bio-Impedance Sensor Placement Relative to the Arterial Sites for Capturing Hemodynamic Parameters.
复制标题
生物阻抗传感器相对于动脉部位的放置对捕获血流动力学参数的影响。
DOI：
10.1109/embc.2019.8857585
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发表时间：
2019
期刊：
影响因子：
--
通讯作者：
Jafari,Roozbeh
中科院分区：
文献类型：
--
作者：
Ibrahim,Bassem;Mrugala,Dariusz;Jafari,Roozbeh
基于动脉内血容量变化的心脏脉搏波形的精确测量对于可靠地估计血流动力学参数（如血压和心输出量）至关重要。将血容量传感器（如生物阻抗传感器）放置在靠近动脉部位的位置对于准确测量脉搏波形至关重要。相对于手腕动脉的传感器位置对脉冲波形的影响，以前没有在人类受试者中研究过。在本文中，我们探讨了生物阻抗传感器在动脉和非动脉位置对重要脉冲波形特征的影响，如脉冲传递时间（PTT），即动脉压力脉冲在两个传感器之间的传递时间，以及舒张峰值误差（DPE），一种测量脉冲信号清晰度的方法。将生物阻抗传感器的电流注入和电压感应电极放置在桡动脉上，可以提供更高的准确度。我们发现，与非动脉PTT相比，动脉PTT的标准差明显更低，表明信号质量更好。同样，我们观察到动脉生物阻抗的DPE要小得多，这证实了我们的预期。基于这些特征，可以使用放置在动脉周围的传感器阵列来确定动脉的位置。
Accurate measurement of the heart pulse waveform based on blood volume changes inside the arteries is crucial for reliable estimation of hemodynamic parameters such as blood pressure and cardiac output. Placement of blood volume sensors such as bio-impedance sensors close to the arterial sites is essential for the accurate measurement of the pulse waveform. The effect of sensor location relative to the wrist arteries on the pulse waveform had not been studied previously on human subjects. In this paper, we explore the effect of arterial and off-arterial placement of the bio-impedance sensor on important pulse waveform features such as pulse transit time (PTT), which is the travel time of the arterial pressure pulse between two sensors, and diastolic peak error (DPE), a measure of pulse signal sharpness. Placing the current injection and voltage sensing electrodes of a bio-impedance sensor on the radial artery provide greater accuracy for such features. We find that arterial PTT has a significantly lower standard deviation compared to off-arterial PTT indicating better signal quality. Similarly, we observe that DPE is much smaller for arterial bio-impedance which confirms our expectations. Based on these features, the location of the artery can be determined using an array of sensors placed around the artery.