The measuring principle bases on a mechanical scan of the human tissue motions which are proportional
to the pulse pressure fluctuations in the arterias. Two piezoelectric sensors are positioned above the examined
part of an arteria and are registrating the relative pressure curves. The time a pulse wave needs to pass both sensors
in addition with the sensor distance, makes it possible for the digital evaluation unit to compute the PWV. Fig. 1 shows
the principle of pulse wave velocity measuring at the forearm.
Fig. 1: Scheme of measuring the pulse wave velocity at the forearm