Automatic lead functionality testing
First Claim
1. A method comprising:
- determining whether a patient is within at least one of a target activity state or a target posture based on a physiological sensor signal, wherein determining whether the patient is within the target activity state comprises determining at least one of whether body movement of the patient exceeds a threshold, whether the patient is changing postures, or whether the patient is exercising;
automatically performing a lead functionality test for at least one electrical lead of a medical device in response to the physiological sensor signal indicating that the patient is within the target activity state or target posture, wherein the at least one electrical lead is implanted in the patient and the medical device is configured to deliver therapy to the patient using the at least one electrical lead, wherein automatically performing the lead functionality test comprises measuring an electrical parameter for at least two different combinations of electrodes of the medical device; and
generating information that indicates at least one of whether the functionality of the at least one electrical lead has degraded or whether the at least one electrical lead has failed based on the measurements of the electrical parameter for the at least two different combination of electrodes, wherein at least one of the determining, automatically performing, or generating is performed via a processor.
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Accused Products
Abstract
Techniques for performing lead functionality tests, e.g., lead impedance tests, for implantable electrical leads are described. In some of the described embodiments, an implantable medical device determines whether a patient is in a target activity state, e.g., an activity state in which lead impedance testing will be unobtrusive, such as when a patient is asleep, or capture information of particular interest, such as when the patient is active, in a particular posture, or changing postures. The implantable medical device performs the lead functionality test based on this determination. Additionally, in some embodiments, the implantable medical device may group a plurality of measurements for a single lead functionality test into a plurality of sessions, and perform the measurement sessions interleaved with delivery of therapeutic stimulation.
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Citations
25 Claims
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1. A method comprising:
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determining whether a patient is within at least one of a target activity state or a target posture based on a physiological sensor signal, wherein determining whether the patient is within the target activity state comprises determining at least one of whether body movement of the patient exceeds a threshold, whether the patient is changing postures, or whether the patient is exercising; automatically performing a lead functionality test for at least one electrical lead of a medical device in response to the physiological sensor signal indicating that the patient is within the target activity state or target posture, wherein the at least one electrical lead is implanted in the patient and the medical device is configured to deliver therapy to the patient using the at least one electrical lead, wherein automatically performing the lead functionality test comprises measuring an electrical parameter for at least two different combinations of electrodes of the medical device; and generating information that indicates at least one of whether the functionality of the at least one electrical lead has degraded or whether the at least one electrical lead has failed based on the measurements of the electrical parameter for the at least two different combination of electrodes, wherein at least one of the determining, automatically performing, or generating is performed via a processor. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A system comprising:
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a medical device including at least one electrical lead implanted within a patient, wherein the medical device is configured to deliver therapy to the patient using the at least one electrical lead; a physiological sensor that generates a physiological sensor signal; and a processor that; determines whether the patient is within at least one of a target activity state or a target posture based on the physiological sensor signal, wherein the processor determines whether the patient is within the target activity state based on determining at least one of whether body movement of the patient exceeds a threshold, whether the patient is changing postures, or whether the patient is exercising, initiates performance of a lead functionality test for the lead in response to the physiological sensor signal indicating that the patient is within the target activity state or target posture, wherein the processor measures an electrical parameter for at least two different combinations of electrodes of the medical device to perform the lead functionality test, and generates information that indicates at least one of whether the functionality of the at least one electrical lead has degraded or whether the at least one electrical lead has failed based on the measurements of the electrical parameter for the at least two different combination of electrodes. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20, 21, 22)
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23. A system comprising:
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means for determining whether a patient is within at least one of a target activity state or a target posture based on a physiological sensor signal, wherein the means for determining whether the patient is within the target activity state comprises means for determining at least one of whether body movement of the patient exceeds a threshold, whether the patient is changing postures, or whether the patient is exercising; means for performing a lead functionality test for at least one electrical lead of a medical device in response to the physiological sensor signal indicating that the patient is within the target activity state or target posture, wherein the at least one electrical lead is implanted in the patient and the medical device is configured to deliver therapy to the patient using the at least one electrical lead, wherein the means for performing the lead functionality test comprises means for measuring an electrical parameter for at least two different combinations of electrodes of the medical device; and means for generating information that indicates at least one of whether the functionality of the at least one electrical lead has degraded or whether the at least one electrical lead has failed based on the measurements of the electrical parameter for the at least two different combination of electrodes. - View Dependent Claims (24)
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25. A system comprising:
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a medical device including at least one electrical lead implanted within a patient, wherein the medical device is configured to deliver therapy to the patient using the at least one electrical lead; a physiological sensor that generates a physiological sensor signal; and a processor that; determines at least one of whether body movement of the patient exceeds a threshold, whether the patient is in a target posture, whether the patient is changing postures, or whether the patient is exercising, based on the physiological sensor signal, initiates performance of a lead functionality test for the lead in response to the physiological sensor signal indicating the at least one of whether the body movement of the patient exceeds the threshold, whether the patient is in the target posture, whether the patient is changing postures, or whether the patient is exercising, wherein the processor measures an electrical parameter for at least two different combinations of electrodes of the medical device to perform the lead functionality test, and generates information that indicates at least one of whether the functionality of the at least one electrical lead has degraded or whether the at least one electrical lead has failed based on the measurements of the electrical parameter for the at least two different combination of electrodes.
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Specification