Pulse wave evaluation apparatus and pulse wave evaluation method
AssigneesKabushiki Kaisha Toshiba, Toshiba Electronic Devices & Storage Corporation
InventorKen Kawakami
Life of this patent
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Abstract
A pulse wave evaluation apparatus has a measurer to measure a pulse wave of a subject, a time detector to detect, per one beat of the measured pulse wave, a rising time of the pulse wave, a time when a first-order differentiation value of the pulse wave with time becomes maximum, and a maximum amplitude time of the pulse wave, a ratio detector to detect an acceleration ratio of mean acceleration from the rising time to the time when the first-order differentiation value becomes maximum and mean acceleration from the time when the first-order differentiation value becomes maximum to the maximum amplitude time, and an evaluator to evaluate the pulse wave based on the acceleration ratio.
Claims14
A pulse wave evaluation apparatus comprising:
- a measurer to measure a pulse wave of a subject;
- a time detector to detect, per one beat of the measured pulse wave, a rising time of the pulse wave, a time when a first-order differentiation value of the pulse wave with time becomes maximum, and a maximum amplitude time of the pulse wave;
- a ratio detector to detect an acceleration ratio of mean acceleration from the rising time to the time when the first-order differentiation value becomes maximum and mean acceleration from the time when the first-order differentiation value becomes maximum to the maximum amplitude time;
- and
- an evaluator to evaluate the pulse wave based on the acceleration ratio.
A pulse wave evaluation method to be executed on computer comprising:
- measuring a pulse wave of a subject;
- detecting, per one beat of the measured pulse wave, a rising time of the pulse wave, a time when a first-order differentiation value of the pulse wave with time becomes maximum, and a maximum amplitude time of the pulse wave;
- detecting an acceleration ratio of mean acceleration from the rising time to the time when the first-order differentiation value becomes maximum and mean acceleration from the time when the first-order differentiation value becomes maximum to the maximum amplitude time;
- and
- evaluating the pulse wave based on the acceleration ratio.
Dependencies are inferred from the claim text.