Abstract
A new plethysmograph, called the electric impedancecuff, was designed for the indirect measurement of (1) blood flow (F), (2) systolic (Ps), mean (Pm) and diastolic (Pd) arterial pressure and (3) compliance (C) and volume elastic modulus (E.) of arteries and veins in various human limbs. The device comprises a compression chamber filled with NaCl solution and a tetrapolar electric impedance plethysmograph whose electrodes are placed inside the chamber; the former for controlling transmural arterial pressure (Pt) and the latter for detecting limb volume (VO), mean arterial volume (Va) and its pulsatile variation (AVa). We applied this method for the noninvasive evaluation of peripheral vascular dynamics in human finger wries.
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