TEMPORAL CONFIGURATION OF A MOTION SENSOR IN AN IMPLANTABLE MEDICAL DEVICE
First Claim
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1. A method of operating an implantable device comprising:
- initializing an implantable device (ID) for disposition within the heart of a patient, the ID comprising a motion sensor for detecting movement of the patient, the initializing step being performed by;
contemporaneously collecting a set of data points from the motion sensor and from a cardiac electrical signal;
correlating time periods within the set of data points from the motion sensor to cardiac activity reflected by the cardiac electrical signal; and
configuring the ID to capture data from the motion sensor by reference to specific repeatable elements of the cardiac electrical signal;
using the ID as configured in the initializing step to capture cardiac signals of the patient and motion signals for the patient.
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Abstract
Methods and devices for configuring the use of a motion sensor in an implantable cardiac device. The electrical signals of the patient'"'"'s heart are observed and may be correlated to the physical motion of the heart as detected by the motion sensor of the implantable cardiac device in order to facilitate temporal configuration of motion sensor data collection that avoids detecting cardiac motion in favor of overall motion of the patient.
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Citations
20 Claims
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1. A method of operating an implantable device comprising:
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initializing an implantable device (ID) for disposition within the heart of a patient, the ID comprising a motion sensor for detecting movement of the patient, the initializing step being performed by; contemporaneously collecting a set of data points from the motion sensor and from a cardiac electrical signal; correlating time periods within the set of data points from the motion sensor to cardiac activity reflected by the cardiac electrical signal; and configuring the ID to capture data from the motion sensor by reference to specific repeatable elements of the cardiac electrical signal; using the ID as configured in the initializing step to capture cardiac signals of the patient and motion signals for the patient. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A method of operating a motion sensor in an implantable device (ID) for disposition within the heart of a patient, the ID comprising a motion sensor for detecting movement of the patient, the method comprising:
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the ID determining a predefined event has occurred in the heart of the patient; and the ID waiting a predetermined period of time after the predefined electrical event and sampling an output of the motion sensor. - View Dependent Claims (9, 10, 11, 12, 13, 14, 15, 16, 17)
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18. A method of determining whether a patient is active using an implantable device (ID) for disposition within the heart of a patient, the ID comprising a motion sensor for detecting movement of the patient, the method comprising:
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sampling a signal from a motion sensor in the ID; analyzing the sampled signal over time to generate a baseline; generating a present state indicator from the sampled signal; comparing the present state indicator to the baseline to yield a difference; and comparing the difference to one or more thresholds to characterize the patient'"'"'s activity level. - View Dependent Claims (19, 20)
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Specification