PHYSIOLOGICAL RESPONSE TO POSTURE CHANGE
First Claim
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1. A method comprising:
- using an implantable medical device to determine a change in a posture of a body;
determining a change in a physiological parameter in response to the change in posture, the physiological parameter including one or more of a heart rate, a heart rate variability, a heart sound, a respiration rate, and a blood pressure; and
generating a device response as a function of the change in the physiological parameter, wherein the change in the physiological parameter comprises at least one of;
a sensed change in heart rate that is less than a normal subject'"'"'s change in heart rate;
a sensed change in blood pressure that is more than a normal subject'"'"'s change in blood pressure;
a sensed change in heart sound energy that is less than a normal subject'"'"'s change in heart sound energy;
a sensed change in heart rate variability that is less than a normal subject'"'"'s change in heart rate variability; and
a sensed decrease in respiration rate.
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Abstract
In an embodiment, an implantable medical device includes a controller circuit, a posture sensing circuit, and a physiological sensing circuit. The controller circuit senses a change in a physiological signal as a result of a change in posture, and generates a response as a function of that change. In another embodiment, the controller circuit identifies a heart failure condition as a function of the change in the physiological signal.
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Citations
20 Claims
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1. A method comprising:
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using an implantable medical device to determine a change in a posture of a body; determining a change in a physiological parameter in response to the change in posture, the physiological parameter including one or more of a heart rate, a heart rate variability, a heart sound, a respiration rate, and a blood pressure; and generating a device response as a function of the change in the physiological parameter, wherein the change in the physiological parameter comprises at least one of; a sensed change in heart rate that is less than a normal subject'"'"'s change in heart rate; a sensed change in blood pressure that is more than a normal subject'"'"'s change in blood pressure; a sensed change in heart sound energy that is less than a normal subject'"'"'s change in heart sound energy; a sensed change in heart rate variability that is less than a normal subject'"'"'s change in heart rate variability; and a sensed decrease in respiration rate. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A method comprising:
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using an implantable medical device to determine a change in a posture of a body; determining a change in energy of a heart sound in response to the change in posture; and generating a device response when determining that the sensed change in heart sound energy is less than a normal subject'"'"'s change in heart sound energy, wherein the response includes at least one of; issuing an alert by the implantable medical device to an external device; adjusting pacing therapy delivered using the implantable medical device; adjusting neural stimulation therapy delivered using the implantable medical device; and adjusting delivery of a substance that is delivered by the implantable medical device. - View Dependent Claims (14)
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15. A method comprising:
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using an implantable medical device to determine a change in a posture of a body; determining a change in a heart rate variability in response to the change in posture; and generating a device response when the sensed change in heart rate variability is less than a normal subject'"'"'s change in heart rate variability, wherein the device response includes at least one of; issuing an alert by the implantable medical device to an external device; adjusting pacing therapy delivered using the implantable medical device; adjusting neural stimulation therapy delivered using the implantable medical device; and adjusting delivery of a substance that is delivered by the implantable medical device. - View Dependent Claims (16)
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17. A method comprising:
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using an implantable medical device to determine a change in a posture of a body; determining a change in a respiration rate in response to the change in posture, and generating a device response when determining a decrease in respiration rate, wherein the device response includes at least one of; issuing an alert by the implantable medical device to an external device; adjusting pacing therapy delivered using the implantable medical device; adjusting neural stimulation therapy delivered using the implantable medical device; and adjusting delivery of a substance that is delivered by the implantable medical device. - View Dependent Claims (18)
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19. A method comprising:
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using an implantable medical device to determine a change in a posture of a body; sensing a change in blood pressure in response to the change in posture; and generating a device response when sensing change in blood pressure that is more than a normal subject'"'"'s change in blood pressure wherein the device response includes at least one of; issuing an alert by the implantable medical device to an external device; adjusting pacing therapy delivered using the implantable medical device; adjusting neural stimulation therapy delivered using the implantable medical device; and adjusting delivery of a substance that is delivered by the implantable medical device.
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20. A method comprising:
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using an implantable medical device to determine a change in a posture of a body; sensing a change in heart rate in response to the change in posture; and generating a device response when sensing a change in heart rate that is less than a normal subject'"'"'s change in heart rate, wherein the device response includes at least one of; issuing an alert by the implantable medical device to an external device; adjusting pacing therapy delivered using the implantable medical device; adjusting neural stimulation therapy delivered using the implantable medical device; and adjusting delivery of a substance that is delivered by the implantable medical device.
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Specification