Signal-to-motion artifact ratio versus frequency for impedance pneumography
Signal-to-motion artifact ratio versus frequency for impedance pneumography
复制标题
阻抗呼吸描记的信号与运动伪影比与频率的关系
DOI：
10.1109/10.364521
复制
发表时间：
1995
影响因子：
4.6
通讯作者：
J. Webster
中科院分区：
文献类型：
--
作者：
J. Rosell;J. Webster
作者在9名成人中测量了12.5 - 185 kHz之间的经胸阻抗。他们使用了一个有两个阻抗通道的系统，两个通道同时检测两个不同频率下阻抗的真实的部分。他们只在腋中线使用了两个电极，将两个通道平行连接。在不同的机动和频率下测量了两个通道之间的幅度关系。结果显示，对于正常呼吸，信号增加20%，运动伪影从12.5 kHz减少到185 kHz。得出的结论是，对于所研究的机动，最好工作在更高的频率比常用的。此外，作者提出了一种方法，以进一步增加信号与运动伪影比的基础上测量在两个频率。<<ETX>>
The authors measured transthoracic impedance between 12.5 and 185 kHz in nine adults. They used a system with two impedance channels, both simultaneously detecting the real part of impedance at two different frequencies. They used only two electrodes in the midaxillary line, connecting both channels in parallel. The amplitude relation between the two channels was measured for different maneuvers and frequencies. Results show for normal breathing an increase of the signal of 20% and a decrease in motion artifacts from 12.5 to 185 kHz. It is concluded that, for the maneuvers studied, it is better to work at higher frequencies than the ones commonly used. Also, the authors suggest a method to further increase the signal-to-motion artifact ratio based on measurement at two frequencies.<<ETX>>