Apparatus for measuring pulse-wave propagation velocity
First Claim
1. An apparatus for measuring a propagation velocity of a pulse wave which is propagated through an artery of a living subject, the apparatus comprising:
- a blood-pressure measuring device which measures a blood pressure value of the subject;
an electrocardiographic-waveform detecting device which includes a plurality of electrodes adapted to contact a body surface of the subject and which detects an electrocardiographic waveform from the subject through said electrodes;
a pulse-wave sensor which is adapted to be worn on the subject and which detects the pulse wave from the subject;
time-difference determining means for determining a time difference between a first periodic point relating to the detected electrocardiographic waveform and a second periodic point relating to the detected pulse wave;
propagation-velocity determining means for determining the propagation velocity of the pulse wave based on the determined time difference; and
propagation-velocity modifying means for modifying the determined propagation-velocity value to a modified propagation-velocity value corresponding to a predetermined blood pressure value, based on the measured blood pressure value, according to a predetermined relationship between modified propagation velocity, and determined propagation velocity and measured blood pressure.
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Accused Products
Abstract
An apparatus for measuring a propagation velocity of a pulse wave which is propagated through an artery of a living subject, the apparatus including an electrocardiographic-waveform detecting device which detects an electrocardiographic waveform from the subject, a pulse-wave sensor which is adapted to be worn on the subject and which detects the pulse wave from the subject, a time-difference determining device for determining a time difference between a first periodic point relating to the detected electrocardiographic waveform and a second periodic point relating to the detected pulse wave, and a propagation-velocity determining means for determining the propagation velocity of the pulse wave based on the determined time difference.
20 Citations
4 Claims
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1. An apparatus for measuring a propagation velocity of a pulse wave which is propagated through an artery of a living subject, the apparatus comprising:
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a blood-pressure measuring device which measures a blood pressure value of the subject; an electrocardiographic-waveform detecting device which includes a plurality of electrodes adapted to contact a body surface of the subject and which detects an electrocardiographic waveform from the subject through said electrodes; a pulse-wave sensor which is adapted to be worn on the subject and which detects the pulse wave from the subject; time-difference determining means for determining a time difference between a first periodic point relating to the detected electrocardiographic waveform and a second periodic point relating to the detected pulse wave; propagation-velocity determining means for determining the propagation velocity of the pulse wave based on the determined time difference; and propagation-velocity modifying means for modifying the determined propagation-velocity value to a modified propagation-velocity value corresponding to a predetermined blood pressure value, based on the measured blood pressure value, according to a predetermined relationship between modified propagation velocity, and determined propagation velocity and measured blood pressure. - View Dependent Claims (2, 3, 4)
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Specification