Patent ID: 9307923
Filing Date: 2016-04-12
CPC Classification: A61B

Claim Text:
1. A signal processing arrangement for processing electrophysiological signals related to uterine contractions of a pregnant woman, the signal processing arrangement comprising: an input for receiving an electrophysiological signal that is measured on the abdomen of a pregnant woman, a band-pass filter for receiving the electrophysiological signal and for providing a filtered electrohysterogram signal, the filter being configured to allow a passage of frequencies of the electrophysiological signal in a frequency band and to attenuate frequencies of the electrophysiological signal outside the frequency band, the frequency band lying in a range from 0 Hz to 3 Hz, a window function applicator for receiving the filtered electrohysterogram signal from the band-pass filter and for providing an output waveform, the window function applicator being configured to generate the output waveform by continuously applying a window function to samples of the filtered electrohysterogram signal, wherein a single application of the window function comprises adding, according to weight values provided by the applied window function, only absolute values of samples of the filtered electrohysterogram signal which relate to a specific time interval that immediately precedes the moment in time at which the window function is applied, and an output for providing the output waveform, the output waveform simulating output data of a tocodynamometer or an intra-uterine pressure catheter, the output data representing data relating to uterine contractions.