PULSE WAVE PROPAGATION TIME MEASUREMENT DEVICE
First Claim
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.
1 Assignment
0 Petitions
Accused Products
Abstract
A pulse wave propagation time measurement device including a first signal processor section that filters an electrocardiographic signal detected by an electrocardiographic sensor, a second signal processor section that filters a photoelectric pulse wave signal detected by a photoelectric pulse wave sensor, peak detectors respectively that detect peaks of the electrocardiographic signal and the photoelectric pulse wave signal, delay time obtaining sections respectively that obtain a delay time of the electrocardiographic signal and of the photoelectric pulse wave signal, peak correctors respectively that correct the peaks of the electrocardiographic signal and the photoelectric pulse wave signal based on the delay time of the electrocardiographic signal and the photoelectric pulse wave signal, and a pulse wave propagation time measurement section that obtains a pulse wave propagation time from a time difference between the corrected peaks of the electrocardiographic signal and the photoelectric pulse wave signal.
-
Citations
20 Claims
-
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. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
-
-
10. A method for determining a pulse wave propagation time, the method comprising:
-
detecting, by an electrocardiographic sensor, an electrocardiographic signal; detecting, by a photoelectric pulse wave sensor, a photoelectric pulse wave signal; filtering by at least one signal processor, the electrocardiographic signal and the photoelectric pulse wave signal; detecting a peak of the electrocardiographic signal and a peak of the photoelectric pulse wave signal; obtaining a delay time of at least one of the electrocardiographic signal and the photoelectric pulse wave signal; correcting at least one of the peak of the electrocardiographic signal and the peak of photoelectric pulse wave signal based on at least one of the delay time of the electrocardiographic signal and the delay time of the photoelectric pulse wave signal, respectively; and calculating 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. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18)
-
-
19. 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 plurality of filters configured to filter the electrocardiographic signal and the photoelectric pulse wave signal, respectively; and at least one hardware processor 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, 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, 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 delay time of the photoelectric pulse wave signal, and 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. - View Dependent Claims (20)
-
Specification