Patent ID: 9510759
Filing Date: 2016-12-06
CPC Classification: A61B

Claim Text:
1. A pulse wave propagation time measurement device comprising: an electrocardiographic sensor including at least one electrocardiographic electrode configured to detect an electrocardiographic signal; a photoelectric pulse wave sensor including a light-emitting element and a light-receiving element configured to detect a photoelectric pulse wave signal; a first signal processor configured to filter the electrocardiographic signal; a second signal processor configured to filter the photoelectric pulse wave signal; a peak detector configured to detect a peak of the electrocardiographic signal filtered by the first signal processor and a peak of the photoelectric pulse wave signal filtered by the second signal processor; a delay time obtaining unit configured to obtain a delay time of at least one of the electrocardiographic signal filtered by the first signal processor and the photoelectric pulse wave signal filtered by the second signal processor; a correcting unit configured to correct at least one of the peak of the electrocardiographic signal and the peak of the photoelectric pulse wave signal detected by the peak detector based on at least one of the delay time of the electrocardiographic signal and the photoelectric pulse wave signal obtained by the delay time obtaining unit; and a calculating unit configured to calculate a pulse wave propagation time from a time difference between the peak of the photoelectric pulse wave signal and the peak of the electrocardiographic signal corrected by the correcting unit.