Method of obtaining a respiratory signal and/or a heart failure signal from a physiological signal.

摘要

A method of deriving a respiration signal and/or a cardiac artifact signal is obtained from a physiological signal, in particular an impedance pneumography signal, is disclosed. After detection of the heartbeat moment, the amplitude of the physiological signal at the heartbeat moment is stored. From the difference of the instantaneous amplitude of the physiological signal and the stored amplitude thereof as well as on the basis of a previous learning signal, a learning signal is calculated and stored, which is either read out starting each time with the particular heartbeat moment for deriving the cardiac artifact signal, or which is subtracted from the physiological signal at each heartbeat moment for deriving the respiration signal.