Blood circulation detection apparatus and blood circulation detection method
AssigneesKabushiki Kaisha Toshiba, Toshiba Electronic Devices & Storage Corporation
InventorKen Kawakami
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Abstract
A blood circulation detection apparatus has a measurer to measure a pulse wave of a subject based on a received optical signal diffused in a body of the subject and received when an optical signal in a predetermined frequency band is emitted to the subject, and a blood circulation detector to detect blood circulation of the subject based on a D. C. component of the received optical signal, a blood-volume change amount of the pulse wave from a rising time of the pulse wave to a time when a first-order differentiation value of the pulse wave with time becomes maximum, and a first-order differentiation value of the blood volume change amount with time.
Claims8
A blood circulation detection apparatus comprising:
- a measurer to measure a pulse wave of a subject based on a received optical signal diffused in a body of the subject and received when an optical signal in a predetermined frequency band is emitted to the subject;
- and
- a blood circulation detector to detect blood circulation of the subject based on a D. C. component of the received optical signal, a blood-volume change amount of the pulse wave from a rising time of the pulse wave to a time when a first-order differentiation value of the pulse wave with time becomes maximum, and a first-order differentiation value of the blood volume change amount with time.
A blood circulation detection method to be executed on computer comprising:
- measuring a pulse wave of a subject based on a received optical signal diffused in a body of the subject and received when an optical signal in a predetermined frequency band is emitted to the subject;
- and
- detecting blood circulation of the subject based on a D. C. component of the received optical signal, a blood-volume change amount of the pulse wave from a rising time of the pulse wave to a time when a first-order differentiation value of the pulse wave with time becomes maximum, and a first-order differentiation value of the blood-volume change amount with time, or based on a value obtained by dividing the blood-volume change amount of the pulse wave by a first-order differentiation value of the blood-volume change amount with time.
Dependencies are inferred from the claim text.