Matsumoto T, Takahashi K, Kawakita T, Nishimura H
Department of Orthopaedic Surgery, Kanazawa University, School of Medicine, Ishikawa, Japan.
Nihon Seikeigeka Gakkai Zasshi. 1990 Apr;64(4):198-207.
Impedance plethysmography has been used clinically to measure the cardiac output. We have improved the apparatus of impedance plethysmography and applied it in the orthopaedic field. It is now possible to measure the blood flow in human fingers and in the extremities of rabbits. Experimentally, we measured the blood flow through the rabbit extremities with the measured values reflecting the ischemic condition. Clinically, we measured the blood flow through the fingers with arteriosclerosis obliterans with the measured values consistent with the angiographic findings. The measurement of blood flow in vascular injuries and attachment of fingers reflected the ischemic condition. By using the impedance plethysmography, we cannot obtain an absolute value because the measured value is affected by the type of electrode and the position of the electrode. We can nevertheless seek a relative value by comparing with the values at normal site. We can also identify any differences before and at the after change in blood flow. When the advantages and disadvantages of this method are better understood, this method will be of wide clinical use.
阻抗体积描记法已在临床上用于测量心输出量。我们改进了阻抗体积描记仪设备并将其应用于骨科领域。现在能够测量人体手指和兔子肢体的血流。在实验中，我们测量了通过兔子肢体的血流，测量值反映了缺血情况。在临床上，我们测量了患有闭塞性动脉硬化症患者手指的血流，测量值与血管造影结果一致。血管损伤和手指附着处血流的测量反映了缺血情况。使用阻抗体积描记法时，由于测量值受电极类型和电极位置的影响，我们无法获得绝对值。然而，我们可以通过与正常部位的值进行比较来寻求相对值。我们还可以识别血流变化前后的任何差异。当更好地理解这种方法的优缺点时，该方法将在临床上得到广泛应用。
