Physiologic response to posture
First Claim
1. An implantable or other ambulatory medical apparatus comprising:
- a posture sensing circuit configured to provide a time varying electrical posture signal representative of posture of a subject;
a physiologic sensing circuit configured to sense one or more time varying physiologic signals, wherein the physiologic signal includes physiologic information of the subject; and
a processor circuit, communicatively coupled to the posture sensing circuit and the physiologic sensing circuit, wherein the processor circuit includes;
a posture calculation circuit configured to determine a posture of the subject and that the posture of the subject is steady state using posture data obtained using the posture signal; and
a measurement circuit configured to derive a physiologic measurement indicative of heart failure (HF) status of the subject using physiologic data extracted from the physiologic signal, wherein the physiologic measurement is triggered by the posture calculation circuit determining that posture is steady state; and
a memory circuit, wherein the processor circuit is configured to store the physiologic measurement indicative of HF status in association with the determined corresponding steady state posture in response to the posture calculation circuit determining that posture is steady state, wherein the corresponding posture is substantially the same for the stored physiological measurement indicative of HF status and level of activity of the subject varies for the stored physiological measurement indicative of HF status, and provide the physiologic measurement indicative of HF status to at least one of a user or process in association with the determined corresponding steady state posture.
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Accused Products
Abstract
An implantable or other ambulatory medical apparatus comprises a posture sensing circuit, a physiologic sensing circuit that senses a time varying physiologic signal, and a processor circuit. The processor circuit includes a posture calculation circuit and a measurement circuit. The posture calculation circuit determines a posture of the subject using posture data obtained using the posture signal and determines when the posture of the subject is steady state. The measurement circuit derives a physiologic measurement using physiologic data extracted from the physiologic signal during at least one time period when posture is determined to be steady state and provides the physiologic measurement to at least one of a user and a process in association with the determined steady state posture.
66 Citations
16 Claims
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1. An implantable or other ambulatory medical apparatus comprising:
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a posture sensing circuit configured to provide a time varying electrical posture signal representative of posture of a subject; a physiologic sensing circuit configured to sense one or more time varying physiologic signals, wherein the physiologic signal includes physiologic information of the subject; and a processor circuit, communicatively coupled to the posture sensing circuit and the physiologic sensing circuit, wherein the processor circuit includes; a posture calculation circuit configured to determine a posture of the subject and that the posture of the subject is steady state using posture data obtained using the posture signal; and a measurement circuit configured to derive a physiologic measurement indicative of heart failure (HF) status of the subject using physiologic data extracted from the physiologic signal, wherein the physiologic measurement is triggered by the posture calculation circuit determining that posture is steady state; and a memory circuit, wherein the processor circuit is configured to store the physiologic measurement indicative of HF status in association with the determined corresponding steady state posture in response to the posture calculation circuit determining that posture is steady state, wherein the corresponding posture is substantially the same for the stored physiological measurement indicative of HF status and level of activity of the subject varies for the stored physiological measurement indicative of HF status, and provide the physiologic measurement indicative of HF status to at least one of a user or process in association with the determined corresponding steady state posture. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A method of operating an implantable or other ambulatory medical device comprising:
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obtaining posture data by sensing a time varying posture signal, wherein the posture signal is representative of posture of a subject; obtaining physiologic data by sensing a time varying physiologic signal, wherein the physiologic signal includes physiologic information of the subject; determining a posture of the subject and determining that the posture is steady state using the posture data; initiating, in response to a device-determination that the posture is steady state, a physiologic measurement indicative of heart failure (HF) status of the subject using the obtained physiologic data posture; storing, in response to the determination that the posture is steady state, the physiologic measurement indicative of HF status in association with the corresponding device-determined steady state posture, wherein the corresponding posture is substantially the same for the stored physiological measurement indicative of HF status and level of activity of the subject varies for the stored physiological measurement indicative of HF status; and providing the device-derived physiologic measurement to at least one of a user or process in association with the determined corresponding steady state posture. - View Dependent Claims (14, 15, 16)
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Specification