Krivitskiĭ N M
Med Tekh. 1986 Jan-Feb(1):11-5.
A model of a limb part represented as a multilayer cylindrical conduction section is considered. The impedance is measured by means of four electrodes, and the exact and approximate expressions for the impedance are derived. With the expressions, one can calculate the value of the pulse blood flow. Various factors affecting the measurement accuracy such as skin conditions, local depths of major vessels, and relative electrode positions are analyzed. Recommendations for the choice of the electrode spacing are given to calculate the pulse and specific blood flow depending upon dimensions of the body part under study, the accuracy being not less than the preset value.
考虑一个将肢体部分表示为多层圆柱形传导段的模型。通过四个电极测量阻抗，并推导了阻抗的精确表达式和近似表达式。利用这些表达式，可以计算脉冲血流的值。分析了影响测量精度的各种因素，如皮肤状况、主要血管的局部深度和电极相对位置。根据所研究身体部位的尺寸，给出了电极间距选择的建议，以计算脉冲血流和比血流量，精度不低于预设值。
