Method for monitoring trepopnea in heart failure patients
AssigneeCardiac Pacemakers, Inc.
InventorsJohn D. Hatlestad, Pramodsingh Hirasingh Thakur, Bin Mi, Jonathan Bennett Shute
Life of this patent
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Abstract
An ambulatory medical device includes a multi-axis posture sensor and processing circuitry. The multi-axis posture sensor is configured to provide an electrical posture sensor output representative of alignment of respective first, second, and third non-parallel axes of the ambulatory medical device with the gravitational field of the earth. The processing circuitry is configured to determine that the subject avoids lying on their left side using the posture sensor output, and compute a metric predictive of one or both of orthopnea and trepopnea in response to determining that the subject avoids lying on their left side.
Claims20
A method of operating an ambulatory medical device (AMD) wearable by a subject or implantable in the subject, the method comprising:
- determining that the subject avoids lying on their left side using a multi-axis posture sensor of the AMD, wherein the posture sensor is configured to provide an electrical posture sensor output representative of alignment of respective first, second, and third non-parallel axes of the AMD with a gravitational field of the earth;
- and
- computing a metric predictive of one or both of orthopnea and trepopnea in response to determining that the subject avoids lying on their left side.
An ambulatory medical device (AMD), the device comprising:
- a multi-axis posture sensor configured to provide an electrical posture sensor output representative of alignment of respective first, second, and third non-parallel axes of the AMD with the gravitational field of the earth;
- and
- processing circuitry communicatively coupled to the multi-axis posture sensor and configured to:
- determine that the subject avoids lying on their left side using the posture sensor output;
- and
- compute a metric predictive of one or both of orthopnea and trepopnea in response to determining that the subject avoids lying on their left side.
A programming device for an ambulatory medical device (AMD), the programming device comprising:
- a communication circuit configured to communicate information wirelessly with the AMD;
- a user interface;
- and
- a programming control circuit operatively coupled to the communication circuit and user interface;
- the programming control circuit configured to:
- receive orientation information of a subject from the AMD;
- compute a metric indicative of the subject avoiding lying on their left side using the orientation information;
- and
- produce an indication of heart failure status of the subject according to a comparison of the metric to a trepopnea detection threshold.
Dependencies are inferred from the claim text.