Method of deriving systolic blood pressure and/or diastolic blood pressure of a subject
AssigneeNitto Denko Corporation
InventorsVisit Thaveeprungsriporn, Somchai Baotong, Srisuda Aphaipanan, Amornsri Khitwongwattana
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Abstract
A method (200) of deriving systolic blood pressure and/or diastolic blood pressure of a subject is disclosed. The method comprises: (i) receiving (202) data related to at least one cardiac cycle of a bio-signal from the subject; (ii) calculating (208) a rise time and a fall time of the at least one cardiac cycle based on the received data; (iii) calculating (208) a parameter derived from a function of the rise time and fail time; and (iv) determining (210) the systolic blood pressure and/or diastolic blood pressure of the subject based on the calculated parameter. A related apparatus is also disclosed.
Claims16
A method of deriving systolic blood pressure and/or diastolic blood pressure of a subject, the method comprising:
- (i) measuring, by a single cuffless portable optical measurement device, one or more bio-signals including at least one cardiac cycle;
- (ii) calculating, by one or more processors based on the measured one or more bio-signals, a rise time and a fall time of the at least one cardiac cycle;
- (iii) calculating, by the one or more processors, a parameter according to the equation:
- f=(Tr)X×(Tf)Y,
- where ƒ is the parameter, Tr is the rise time, Tf is the fall time, and x and y are predetermined constants selected from a range of between −3 to 3, and exclusive of 0;
- (iv) determining, by the one or more processors based on the calculated parameter, at least one of the systolic blood pressure or the diastolic blood pressure of the subject;
- and
- (v) outputting, by a display, the determined at least one of the systolic blood pressure or the diastolic blood pressure.
A non-transitory computer readable medium storing instructions for deriving systolic blood pressure and/or diastolic blood pressure of a subject, which when executed by one or more processors of a single cuffless portable optical measurement device configured to capture one or more bio-signals cause the one or more processors to:
- (i) measure the one or more bio-signals including at least one cardiac cycle;
- (ii) calculate, based on the measured one or more bio-signals, a rise time and a fall time of the at least one cardiac cycle;
- (iii) calculate a parameter according to the equation:
- f=(Tr)X×(Tf)y,
- where ƒ is the parameter, Tr is the rise time, Tf is the fall time, and x and y are predetermined constants selected from a range of between −3 to 3, and exclusive of 0;
- (iv) determine, based on the calculated parameter, at least one of the systolic blood pressure or diastolic blood pressure;
- and
- (v) output to a display the determined at least one of the systolic blood pressure or the diastolic blood pressure.
A single cuffless optical measurement device for deriving systolic blood pressure and/or diastolic blood pressure of a subject, the single cuffless optical measurement device comprising:
- (i) a sensor configured to capture one or more bio-signals including at least one cardiac cycle;
- (ii) a display;
- and
- (iii) a processor configured to:
- (a) measure the one or more bio-signals;
- (b) calculate, based on the measured bio-signals, a rise time and a fall time of the at least one cardiac cycle;
- (c) calculate a parameter according to the equation:
- f=(Tr)X×(Tf)Y,
- where ƒ is the parameter, Tr is the rise time, Tf is the fall time, and x and y are predetermined constants selected from a range of between −3 to 3, and exclusive of 0;
- (d) determine, based on the calculated parameter, at least one of the systolic blood pressure or the diastolic blood pressure;
- and
- (e) output, to the display, the determined at least one of the systolic blood pressure or the diastolic blood pressure.
Dependencies are inferred from the claim text.