Guseĭnov B A, Shishin V I
Anesteziol Reanimatol. 1989 May-Jun(3):68-70.
A decrease in the amplifying ratio of inlet high-frequency amplifiers makes it possible to use PPG2-02 apparatus for tetrapolar modification of integral body impedance plethysmography (IBIP) without the currently used accessory device - divider. In 15 subjects impedance was measured using PPG-01 apparatus in the modification of M. I. Tischenko (intended for bipolar IBIP) or PPG2-02 apparatus. A direct close correlation (r = 0.982) has been established between impedance value, as measured by PPG2-02 apparatus and calculated according to linear regression equation, and impedance value, as measured by PPG2-02 apparatus. Mean deviation of the impedance value measured by PPG2-02 apparatus from that measured by PPG-01 apparatus was 2.8% and did not exceed 6%. The impedance value measured may be used for the determination of the cardiac output and extracellular fluid volume according to M. I. Tishchenko's formulas.
入口高频放大器放大率的降低使得无需使用当前所用的辅助设备——分频器，就能将PPG2 - 02设备用于整体身体阻抗体积描记法（IBIP）的四极改装。在15名受试者中，使用PPG - 01设备（用于M. I. 季先科改良法，适用于双极IBIP）或PPG2 - 02设备测量阻抗。通过PPG2 - 02设备测量并根据线性回归方程计算得出的阻抗值，与通过PPG2 - 02设备测量的阻抗值之间建立了直接的紧密相关性（r = 0.982）。PPG2 - 02设备测量的阻抗值与PPG - 01设备测量的阻抗值的平均偏差为2.8%，且未超过6%。所测得的阻抗值可根据M. I. 季先科的公式用于心输出量和细胞外液量的测定。
