Yamamoto Y, Yamamoto T, Oberg P A
Department of Electrical Engineering, Okayama University, Japan.
Med Biol Eng Comput. 1991 Jul;29(4):419-24. doi: 10.1007/BF02441664.
Electrode design and electrode positioning are important factors in blood flow measurements using impedance plethysmography. Optimal electrode type and accurate positioning will decrease measurement errors and improve the signal-to-noise-ratio. Disk electrodes were found to be superior to tape electrodes because of their better skin-electrode stability and because they prevent limb compression. The distance between current electrodes and potential electrodes should be greater than 2.3 R (disk electrodes) and 1.5 R (tape electrodes) to avoid the influence of the so-called diffusion resistance (R is the radius of the limb at the electrode site).
在使用阻抗体积描记法进行血流测量时，电极设计和电极定位是重要因素。最佳的电极类型和精确的定位将减少测量误差并提高信噪比。由于盘状电极具有更好的皮肤-电极稳定性且能防止肢体受压，因此发现其优于带状电极。电流电极和电位电极之间的距离应大于2.3R（盘状电极）和1.5R（带状电极），以避免所谓扩散电阻的影响（R是电极部位肢体的半径）。
