PULSE WAVE VELOCITY MEASUREMENT DEVICE AND PULSE WAVE VELOCITY MEASUREMENT PROGRAM
First Claim
1. A pulse wave velocity measurement device comprising:
- a pulse wave detection unit (1) for detecting a pulse wave at one site in a living body,a reference time detection unit (2) for detecting reference time for identification of an ejection wave component included in the pulse wave at the one site that is detected by the pulse wave detection unit (1) and reference time for identification of a reflected wave component included in the pulse wave,a pulse wave amplitude detection unit (3) for detecting an amplitude of the pulse wave that corresponds to the reference time for the ejection wave component detected by the reference time detection unit (2) and detecting an amplitude of the pulse wave that corresponds to the reference time for the reflected wave component detected by the reference time detection unit,a pulse wave velocity detection unit (5) for finding a velocity of the pulse wave at which the pulse wave propagates, on basis of the reference time for the ejection wave component and the reference time for the reflected wave component that have been detected by the reference time detection unit (2) and the amplitude of the pulse wave that corresponds to the reference time for the ejection wave component and the amplitude of the pulse wave that corresponds to the reference time for the reflected wave component which amplitudes have been detected by the pulse wave amplitude detection unit (3).
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Accused Products
Abstract
In a pulse wave velocity measurement device (10), reference times (T1, T2) for an ejection wave component (S1) and a reflected component (S2) of a pulse wave S are detected by a reference time detection unit (2), and amplitudes (W1, W2) of the pulse wave (S) that correspond to the reference times (T1, T2) for the ejection wave component (S1) and the reflected wave component (S2) are detected by a pulse wave amplitude detection unit (3). A pulse wave velocity detection unit (5) finds a velocity (PWV1) of the pulse wave (S) on basis of the reference times (T1, T2) for the ejection wave component (S1) and the reflected wave component (S2) and the amplitudes (W1, W2) of the pulse wave (S) that correspond to the reference times (T1, T2) for the ejection wave component (S1) and the reflected wave component (S2). Thus the pulse wave velocity can be measured with high accuracy in consideration of a difference between the pulse wave velocities of the ejection wave and the reflected wave which difference is caused by a difference between the amplitude of the ejection wave component (S1) and the amplitude of the reflected wave component (S2).
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Citations
6 Claims
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1. A pulse wave velocity measurement device comprising:
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a pulse wave detection unit (1) for detecting a pulse wave at one site in a living body, a reference time detection unit (2) for detecting reference time for identification of an ejection wave component included in the pulse wave at the one site that is detected by the pulse wave detection unit (1) and reference time for identification of a reflected wave component included in the pulse wave, a pulse wave amplitude detection unit (3) for detecting an amplitude of the pulse wave that corresponds to the reference time for the ejection wave component detected by the reference time detection unit (2) and detecting an amplitude of the pulse wave that corresponds to the reference time for the reflected wave component detected by the reference time detection unit, a pulse wave velocity detection unit (5) for finding a velocity of the pulse wave at which the pulse wave propagates, on basis of the reference time for the ejection wave component and the reference time for the reflected wave component that have been detected by the reference time detection unit (2) and the amplitude of the pulse wave that corresponds to the reference time for the ejection wave component and the amplitude of the pulse wave that corresponds to the reference time for the reflected wave component which amplitudes have been detected by the pulse wave amplitude detection unit (3). - View Dependent Claims (2, 3)
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4. A pulse wave velocity measurement program that makes a computer execute:
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a reference time deriving function of finding reference time for identification of an ejection wave component included in a pulse wave at one site in a living body and reference time for identification of a reflected wave component included in the pulse wave, a pulse wave amplitude deriving function of finding an amplitude of the pulse wave that corresponds to the reference time for the ejection wave component and finding an amplitude of the pulse wave that corresponds to the reference time for the reflected wave component, and a pulse wave velocity deriving function of calculating a velocity of the pulse wave at which the pulse wave propagates, on basis of the reference time for the ejection wave component, the reference time for the reflected wave component, the amplitude of the pulse wave that corresponds to the reference time for the ejection wave component, and the amplitude of the pulse wave that corresponds to the reference time for the reflected wave component. - View Dependent Claims (5, 6)
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Specification