Wearable blood pressure monitoring system
First Claim
1. An apparatus, comprising:
- a first pulse wave sensor and a second pulse wave sensor; and
one or more memories storing computer readable code; and
one or more processors, the one or more processors, in response to loading and executing the computer readable code, causing the apparatus to perform operations comprising;
receiving first pulse wave data from the first pulse wave sensor,wherein the first pulse wave sensor is configured to be placed at a first location on a person,wherein first pulse wave data comprises data from one or more pulse waves from the first location on the person;
receiving second pulse wave data,wherein the second pulse wave sensor is configured to be placed at a first second location on the person,wherein at least one of the first pulse wave sensor and second pulse wave sensor comprises a pulse wave pressure sensor,wherein the pulse wave pressure sensor comprises a layered structure configured, in response to pulse waves in the person, to generate electronic pulse waves in a form of a capacitance versus time,wherein the first and second locations are different locations on the person,wherein second pulse wave data comprises data from one or more pulse waves from the second location of the person;
determining blood pressure using at least the first and second pulse wave data,wherein determining blood pressure using at least the first and second pulse wave data-further comprises determining a systolic blood pressure based on pulse transit time using the following;
SBPPTT=a*ln(h2/PTT2)+b, where h is the person'"'"'s height, a and b are constants which are empirically obtained, PTT is a pulse transit time determined using the first and second pulse wave data, and ln(⋅
) means natural logarithm, and wherein PTT is determined as a time between a maximum inclination in the first pulse wave data and a corresponding maximum inclination in the second pulse wave data; and
outputting an indication of the blood pressure.
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Abstract
An apparatus includes one or more memories storing computer readable code and processor(s). The processor(s), in response to loading and executing the computer readable code, cause the apparatus to perform operations including receiving electrocardiogram data from an electrocardiogram sensor. The electrocardiogram data includes data from an electrocardiogram from a person. The operations also include receiving pulse wave data from one or more pulse wave pressure sensors. The pulse wave data includes data from one or more pulse waves from the person. The operations further include determining blood pressure using the electrocardiogram data or the pulse wave data from the chest and the pulse wave data from the wrist or finger, and outputting an indication of the blood pressure. Another apparatus uses pulse wave data from two pulse wave sensors (e.g., pulse wave pressure sensor(s) and/or PPG sensor(s)) and blood pressure determinations are made using these pulse wave data.
3 Citations
17 Claims
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1. An apparatus, comprising:
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a first pulse wave sensor and a second pulse wave sensor; and one or more memories storing computer readable code; and
one or more processors, the one or more processors, in response to loading and executing the computer readable code, causing the apparatus to perform operations comprising;receiving first pulse wave data from the first pulse wave sensor, wherein the first pulse wave sensor is configured to be placed at a first location on a person, wherein first pulse wave data comprises data from one or more pulse waves from the first location on the person; receiving second pulse wave data, wherein the second pulse wave sensor is configured to be placed at a first second location on the person, wherein at least one of the first pulse wave sensor and second pulse wave sensor comprises a pulse wave pressure sensor, wherein the pulse wave pressure sensor comprises a layered structure configured, in response to pulse waves in the person, to generate electronic pulse waves in a form of a capacitance versus time, wherein the first and second locations are different locations on the person, wherein second pulse wave data comprises data from one or more pulse waves from the second location of the person; determining blood pressure using at least the first and second pulse wave data, wherein determining blood pressure using at least the first and second pulse wave data-further comprises determining a systolic blood pressure based on pulse transit time using the following;
SBPPTT=a*ln(h2/PTT2)+b,where h is the person'"'"'s height, a and b are constants which are empirically obtained, PTT is a pulse transit time determined using the first and second pulse wave data, and ln(⋅
) means natural logarithm, and wherein PTT is determined as a time between a maximum inclination in the first pulse wave data and a corresponding maximum inclination in the second pulse wave data; and
outputting an indication of the blood pressure.- View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
where c, d and e are constants which are empirically obtained, and T2 is determined using selected pulse wave data from either the first pulse wave data or the second pulse wave data and is a time interval between a peak point of a pulse wave in the selected pulse wave data and a baseline point where the pulse wave reaches to the baseline.
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10. The apparatus of claim 9, wherein the one or more processors, in response to loading and executing the computer readable code, further cause the apparatus to perform operations comprising:
- outputting one or more indications of one or more of the following;
the systolic blood pressure based on pulse transit time (PTT) (SBPPTT) and diastolic blood pressure, wherein the outputting is to one or more of a display or a wireless or wired network interface.
- outputting one or more indications of one or more of the following;
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11. The apparatus of claim 1, wherein determining blood pressure using at least the first and second pulse wave data further comprises:
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determining the systolic blood pressure using the following equation;
SBP=SBPPTT[1+α
×
SIDVP],where SBP is systolic blood pressure, SBPPTT is the systolic blood pressure based on the pulse transit time (PTT), α
is defined empirically, and SIDVP is a stiffness index.
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12. The apparatus of claim 11, wherein the one or more processors, in response to loading and executing the computer readable code, further cause the apparatus to perform operations comprising:
- outputting one or more indications of one or more of the following;
the systolic blood pressure based on pulse transit time (PTT) (SBPPTT), diastolic blood pressure, and the systolic blood pressure, wherein the outputting is to one or more of a display or a wireless or wired network interface.
- outputting one or more indications of one or more of the following;
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13. The apparatus of claim 11, wherein the stiffness index SIDVP is determined using the following:
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14. The apparatus of claim 13, wherein the one or more processors, in response to loading and executing the computer readable code, further cause the apparatus to perform operations comprising:
- outputting one or more indications of one or more of the following;
the systolic blood pressure based on pulse transit time (PTT) (SBPPTT), diastolic blood pressure, the systolic blood pressure, and the stiffness index, wherein the outputting is to one or more of a display or a wireless or wired network interface.
- outputting one or more indications of one or more of the following;
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15. An apparatus, comprising:
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a first pulse wave sensor configured to be placed at a first location on a person, wherein output of the first pulse wave sensor comprises data from one or more pulse waves; a second pulse wave sensor configured to be placed at a second location on the person, wherein at least one of the first pulse wave sensor and the second pulse wave sensor comprises a pulse wave pressure sensor, wherein the pulse wave pressure sensor comprises a layered structure configured, in response to pulse waves in the person, to generate electronic pulse waves in a form of a capacitance versus time, wherein the first and second locations are different locations on the person, wherein output of the second pulse wave sensor comprises data from one or more pulse waves; one or more memories storing computer readable code; and one or more processors, wherein the one or more processors, in response to loading and executing the computer readable code, are configured to cause the apparatus to perform operations comprising; determining blood pressure using at least the first and second pulse wave data, wherein determining blood pressure using at least the first and second pulse wave data-further comprises determining a systolic blood pressure (SBPPTT) based on pulse transit time using the following;
SBPPTT=a*ln(h2/PTT2)+b,where h is the person'"'"'s height, a and b are constants which are empirically obtained, PTT is a pulse transit time determined using the first and second pulse wave data, and ln(⋅
) means natural logarithm, and wherein PTT is determined as a time between a maximum inclination in the first pulse wave data and a corresponding maximum inclination in the second pulse wave data and outputting an indication of the blood pressure. - View Dependent Claims (16, 17)
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Specification