The invention relates to a method for operating a blood pressure measuring device, comprising the method steps: performing a blood pressure measurement using the blood pressure measuring device, consisting of a cuff for placing around an extremity, a pump for inflating the sleeve and a pressure sensor for registering the cuff pressure, inflation of the cuff taking place in an inflation phase and release of the pressure in the sleeve taking place in a release phase, registering and storing the pressure profile in the cuff over time during the inflation phase and/or during the release phase in a control and storage unit, extracting a pulse-like signal component from the pressure profile over time of the measured cuff pressure during the inflation phase and/or the release phase by a signal analysis inside the control and storage unit, signal analysis of the extracted in pulse-like signal component.