Talakov A A, Bogatinov V T
Eksp Med Morfol. 1980;19(2):115-20.
The role of specific electric resistance of blood (rho) in determining systolic cardiac volume by impedance plethysmography is discussed. It is pointed out that the known five mathematical equations for rho estimation by the hematocrit (Hct) and the temperature (T0) differ from one another and are moreover good for humans, but not for experimental animals. A suitable equipment and technique for direct (in vitro) measurement of rho is suggested. The obtained results enabled to deduce a mathematical dependence, allowing to determine the specific electric resistance of blood (rho) in dogs with sufficient accuracy, on the basis of the hematocrit and the temperature. The adequacy of this mathematical dependence for determination of rho in dogs has been confirmed by control studies.
讨论了血液比电阻（ρ）在通过阻抗体积描记法测定心脏收缩容积中的作用。指出已知的通过血细胞比容（Hct）和温度（T0）估算ρ的五个数学方程彼此不同，而且对人类适用，但对实验动物不适用。建议了一种用于直接（体外）测量ρ的合适设备和技术。所获得的结果能够推导出一种数学关系，从而能够基于血细胞比容和温度以足够的精度确定犬类血液的比电阻（ρ）。对照研究证实了这种数学关系对于确定犬类ρ的适用性。
