Blazek V, Schmitt H J, Schultz-Ehrenburg U, Rathmann M
Institut für Hochfrequenztechnik, RWTH Aachen.
Biomed Tech (Berl). 1995 Jul-Aug;40(7-8):200-4.
Venous occlusion plethysmography is a well-established noninvasive procedure for the investigation of venous outflow disorders. Various different sensor systems are available for the purpose, e.g. photoplethysmography, strain-gauge plethysmography and impedance plethysmography. The technique of microwave volumetry described in this paper is based on the interaction of the electromagnetic fields within the loss medium, tissue, and uses an air-filled resonant cavity as a sensor. As in the case of a microwave oven, this is excited by a high-frequency generator, but involves the use of far less power. As the volume of the measured objects (foot, arm) increases, the losses in the resonator also increase and can be analysed in a computer. The results can be represented in the form of a classical venous occlusion curve.
静脉阻塞体积描记法是一种成熟的用于研究静脉流出障碍的非侵入性检查方法。为此有各种不同的传感器系统可供使用，例如光电容积描记法、应变片体积描记法和阻抗体积描记法。本文所述的微波容积测量技术基于损耗介质（组织）内电磁场的相互作用，并使用充气谐振腔作为传感器。与微波炉的情况一样，它由高频发生器激发，但功率要小得多。随着被测物体（足部、手臂）体积的增加，谐振器中的损耗也会增加，并可在计算机中进行分析。结果可以以经典静脉阻塞曲线的形式呈现。
