Pulse wave measuring apparatus that can calculate early systolic component and late systolic component properly from original waveform
First Claim
1. A pulse wave measuring apparatus comprising:
- a first calculation unit calculating a wave of multi-dimensional derivative from a pulse wave of one beat to obtain a characteristic point of multi-dimensional derivative, and a second calculation unit calculating, based on presence of a certain characteristic point of multi-dimensional derivative calculated by said first calculation unit in a predetermined interval of said pulse wave of one beat, one of an early systolic component and late systolic component corresponding to said predetermined interval, using said certain characteristic point of multi-dimensional derivative.
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Abstract
A pulse wave measuring apparatus obtains the N-th derivative of a measured pulse waveform. The pulse waveform is classified into waveforms α-δ in accordance with the presence/absence of a shoulder (inflection point) at a rising phase of a pulse waveform of one beat, and also in accordance with the presence/absence of a shoulder in a falling phase. In each classified waveform, each calculated characteristic point of the N-th derivative corresponds to a traveling wave or reflected wave. The pulse wave measuring apparatus can calculate an AI value or the like that is the characteristic value of a pulse wave using such characteristic points and calculation equation of each waveform.
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Citations
16 Claims
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1. A pulse wave measuring apparatus comprising:
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a first calculation unit calculating a wave of multi-dimensional derivative from a pulse wave of one beat to obtain a characteristic point of multi-dimensional derivative, and a second calculation unit calculating, based on presence of a certain characteristic point of multi-dimensional derivative calculated by said first calculation unit in a predetermined interval of said pulse wave of one beat, one of an early systolic component and late systolic component corresponding to said predetermined interval, using said certain characteristic point of multi-dimensional derivative. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A biological wave analysis program product causing a computer to execute analysis of a biological wave that is a superposition of a first waveform and second waveform, causing the computer to execute:
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a first calculation step of calculating a wave of multi-dimensional derivative from said biological wave of one beat to obtain a characteristic point of multi-dimensional derivative, and a second calculation step of calculating, based on presence of a certain characteristic point of multi-dimensional derivative calculated by said first step of calculating in a predetermined interval of said biological wave of one beat, one of said first waveform and second waveform corresponding to said predetermined interval, using said certain characteristic point of multi-dimensional derivative. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16)
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Specification