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1.发明申请公开(公告)号：US20200367767A1
公开(公告)日：2020-11-26
申请号：US16990650
申请日：2020-08-11
Applicant: Apple Inc.
Inventor： Thomas J. Sullivan , Wren Nancy Dougherty , Richard C. Kimoto , Erno Klaassen , Ravi K. Narasimhan , Stephen J. Waydo , Todd K. Whitehurst , Derek Park-Shing Young , Santiago Quijano , Zijing Zeng
IPC: A61B5/021 , A61B5/0408 , A61B5/1455 , A61B5/00
Abstract: A pulse transit time is measured non-invasively and used to calculate a blood pressure value. A method of determining one or more blood pressure values includes propagating an alternating drive current through a thorax of a subject via electrodes located on a wrist-worn device. Resulting voltage levels of the subject are sensed by the wrist-worn device. The voltage levels are processed to detect when a volume of blood is ejected from the left ventricle. Output from a pulse arrival sensor coupled to the wrist-worn device is processed to detect when a blood pressure pulse generated by ejection of the volume of blood from the left ventricle arrives at the wrist. A pulse transit time (PTT) for transit of the blood pressure pulse from the left ventricle to the wrist is calculated. One or more blood pressure values for the subject are determined based on the PTT.
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Patent Agency Ranking
公开(公告)号：US11918324B2
公开(公告)日：2024-03-05
申请号：US16990650
申请日：2020-08-11
Applicant: Apple Inc.
Inventor： Thomas J. Sullivan , Wren Nancy Dougherty , Richard C. Kimoto , Erno Klaassen , Ravi K. Narasimhan , Stephen J. Waydo , Todd K. Whitehurst , Derek Park-Shing Young , Santiago Quijano , Zijing Zeng
CPC classification number: A61B5/02125 , A61B5/14551 , A61B5/282 , A61B5/681 , A61B5/6824 , A61B5/02416 , A61B5/053
Abstract: A pulse transit time is measured non-invasively and used to calculate a blood pressure value. A method of determining one or more blood pressure values includes propagating an alternating drive current through a thorax of a subject via electrodes located on a wrist-worn device. Resulting voltage levels of the subject are sensed by the wrist-worn device. The voltage levels are processed to detect when a volume of blood is ejected from the left ventricle. Output from a pulse arrival sensor coupled to the wrist-worn device is processed to detect when a blood pressure pulse generated by ejection of the volume of blood from the left ventricle arrives at the wrist. A pulse transit time (PTT) for transit of the blood pressure pulse from the left ventricle to the wrist is calculated. One or more blood pressure values for the subject are determined based on the PTT.
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公开(公告)号：US10646121B2
公开(公告)日：2020-05-12
申请号：US15274183
申请日：2016-09-23
Applicant: Apple Inc.
Inventor： Ravi K. Narasimhan , Zijing Zeng , Zhipeng Zhang
Abstract: The present invention generally relates to the measuring and monitoring of blood pressure. More specifically, embodiments may apply the theory of applanation tonometry for the measurement of blood pressure. Some embodiments provide a method for measuring mean arterial pressure. Some embodiments provide a device that may be worn by a user that may non-invasively measure and monitor blood pressure of a user. In some embodiments, the invention generally relates to sensor arrays for use with a wrist-worn device to measure blood pressure. Embodiments of the sensor array designs described may be configured to improve resolution by decoupling nodes of the sensor array.
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公开(公告)号：US20200367760A1
公开(公告)日：2020-11-26
申请号：US16987851
申请日：2020-08-07
Applicant: Apple Inc.
Inventor： Erno H. Klaassen , Wren Nancy Dougherty , Richard C. Kimoto , Ravi K. Narasimhan , Thomas J. Sullivan , Stephen J. Waydo , Todd K. Whitehurst , Santiago Quijano , Derek Park-Shing Young , Zijing Zeng
Abstract: Methods and devices for obtaining a blood pressure measurement of a subject measure a transit time of a blood pulse of the subject. A method includes sensing, with a pulse ejection sensor of a wrist-worn device, ejection of blood from the left ventricle. Arrival of a resulting blood pressure pulse at the wrist is sensed via a pulse arrival sensor of the wrist-worn device. A transit time of the blood pressure pulse from the left ventricle to the wrist is determined. A relative blood pressure value of the subject is determined based on the transit time. A reference absolute blood pressure value associated with the relative blood pressure value is received. An absolute blood pressure value for the relative blood pressure value is determined based on the reference absolute blood pressure value and the relative blood pressure value.
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公开(公告)号：US12220213B2
公开(公告)日：2025-02-11
申请号：US16987851
申请日：2020-08-07
Applicant: Apple Inc.
Inventor： Erno H. Klaassen , Wren Nancy Dougherty , Richard C. Kimoto , Ravi K. Narasimhan , Thomas J. Sullivan , Stephen J. Waydo , Todd K. Whitehurst , Santiago Quijano , Derek Park-Shing Young , Zijing Zeng
Abstract: Methods and devices for obtaining a blood pressure measurement of a subject measure a transit time of a blood pulse of the subject. A method includes sensing, with a pulse ejection sensor of a wrist-worn device, ejection of blood from the left ventricle. Arrival of a resulting blood pressure pulse at the wrist is sensed via a pulse arrival sensor of the wrist-worn device. A transit time of the blood pressure pulse from the left ventricle to the wrist is determined. A relative blood pressure value of the subject is determined based on the transit time. A reference absolute blood pressure value associated with the relative blood pressure value is received. An absolute blood pressure value for the relative blood pressure value is determined based on the reference absolute blood pressure value and the relative blood pressure value.
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公开(公告)号：US20170086686A1
公开(公告)日：2017-03-30
申请号：US15274183
申请日：2016-09-23
Applicant: Apple Inc.
Inventor： Ravi K. Narasimhan , Zijing Zeng , Zhipeng Zhang
CPC classification number: A61B5/02141 , A61B5/02444 , A61B5/6824 , A61B5/6831 , A61B2562/0214 , A61B2562/0247 , A61B2562/046
Abstract: The present invention generally relates to the measuring and monitoring of blood pressure. More specifically, embodiments may apply the theory of applanation tonometry for the measurement of blood pressure. Some embodiments provide a method for measuring mean arterial pressure. Some embodiments provide a device that may be worn by a user that may non-invasively measure and monitor blood pressure of a user. In some embodiments, the invention generally relates to sensor arrays for use with a wrist-worn device to measure blood pressure. Embodiments of the sensor array designs described may be configured to improve resolution by decoupling nodes of the sensor array.
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