Acoustic method for measuring a signal propagation time in blood and device for using this method

摘要

Measuring the ultrasonic signal transit time within a fluid medium, e.g. blood, comprising capturing the oscillating received signal (12), scanning during at least one half-period (14,15) and rechecking by a selection criterion, is new. - Measuring the ultrasonic signal transit time within a fluid medium, e.g. blood, comprising capturing the oscillating received signal (12), scanning during at least one half-period (14,15) and rechecking by a selection criterion, is new. Only on a positive check is at least one inter- or extrapolated contact point (20,21) of the signal determined with a static level (11) in a reception/time diagram, to show the signal transit time or a change in the signal transit time.