Therapy system including cardiac rhythm therapy and neurostimulation capabilities
First Claim
1. A method for determining whether lead migration has occurred, the method comprising:
- delivering an electrical signal to a tissue site within a patient via a set of electrodes of a lead electrically connected to a neurostimulation therapy module;
sensing a baseline physiological response from a patient to produce an electromyogram (EMG) waveform;
storing the baseline physiological response into memory, the baseline physiological response comprising a baseline characteristic of the EMG waveform;
sensing a physiological response from a patient to produce a EMG waveform at a subsequent time to the baseline physiological response;
comparing the physiological response to the baseline physiological response by comparing a characteristic of the EMG waveform produced at the subsequent time to the baseline characteristic of the EMG waveform;
detecting lead migration if the characteristic of the EMG waveform increased from the baseline EMG waveform characteristic; and
decreasing intensity of neurostimulation in response to detecting the lead migration.
1 Assignment
0 Petitions
Accused Products
Abstract
An implantable medical system that includes a cardiac therapy module and a neurostimulation therapy module may identify when neurostimulation electrodes have migrated toward a patient'"'"'s heart. In some examples, the system may determine whether the neurostimulation electrodes have migrated toward the patient'"'"'s heart based on a physiological response to an electrical signal delivered to the patient via the neurostimulation electrodes. In addition, in some examples, the system may determine whether the neurostimulation electrodes have migrated toward the patient'"'"'s heart based on an electrical cardiac signal sensed via the neurostimulation electrodes.
117 Citations
30 Claims
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1. A method for determining whether lead migration has occurred, the method comprising:
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delivering an electrical signal to a tissue site within a patient via a set of electrodes of a lead electrically connected to a neurostimulation therapy module; sensing a baseline physiological response from a patient to produce an electromyogram (EMG) waveform; storing the baseline physiological response into memory, the baseline physiological response comprising a baseline characteristic of the EMG waveform; sensing a physiological response from a patient to produce a EMG waveform at a subsequent time to the baseline physiological response; comparing the physiological response to the baseline physiological response by comparing a characteristic of the EMG waveform produced at the subsequent time to the baseline characteristic of the EMG waveform; detecting lead migration if the characteristic of the EMG waveform increased from the baseline EMG waveform characteristic; and decreasing intensity of neurostimulation in response to detecting the lead migration. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A system comprising:
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a lead comprising a set of electrodes; a neurostimulation therapy module electrically connected to the set of electrodes of the lead, wherein neurostimulation therapy module generates and delivers an electrical signal to a tissue site within the patient via the set of electrodes to determine a baseline physiological response; a sensing module that senses a baseline physiological response to produce an electromyogram (EMG) waveform and a subsequent physiological signal to produce another EMG waveform of the patient; a processor that stores the baseline physiological response comprising a baseline characteristic of the EMG waveform, compares the baseline characteristic of the EMG waveform and a characteristic of the EMG waveform produced subsequent to the baseline physiological response to determine the lead has migrated if the characteristic of the EMG waveform has increased from the baseline characteristic of the EMG waveform and controls the neurostimulation therapy module to selectively deliver neurostimulation to the patient based on whether the lead has migrated. - View Dependent Claims (15, 16, 17, 18, 19, 20, 21, 22, 23, 24)
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25. A system for determining whether lead migration has occurred, the system comprising:
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a set of electrodes of a lead electrically connected to a neurostimulation therapy module; means for sensing a baseline physiological response from a patient to produce an electromyogram (EMG) waveform, the baseline physiological response comprising a baseline characteristic of the EMG waveform; means for storing the baseline physiological response into memory; means for sensing a physiological response from a patient to produce an EMG waveform at a subsequent time to the baseline physiological response; means for comparing the physiological response to the baseline physiological response by comparing a characteristic of the EMG waveform produced at the subsequent time to the baseline characteristic of the EMG waveform; means for detecting lead migration if the characteristic of the EMG waveform increased from the baseline EMG waveform characteristic; and means for decreasing intensity of neurostimulation if lead migration is detected. - View Dependent Claims (26, 27, 28, 29)
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30. A non-transitory computer-readable medium comprising instructions that cause a programmable processor to:
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control a cardiac therapy module to deliver cardiac rhythm therapy to a patient via a first set of electrodes of a first lead electrically connected to the cardiac therapy module; control a neurostimulation therapy module to deliver an electrical signal to a tissue site within a patient via a second set of electrodes of a second lead electrically connected to the neurostimulation therapy module; control a sensing module to sense a physiological signal; detect a baseline physiological response of the patient to the electrical signal based on the physiological signal, the baseline physiological response comprising a characteristic of an electromyogram (EMG) signal; store the characteristic of the EMG signal as a baseline physiological response; detect a physiological response comprising a characteristic of the EMG signal at a time subsequent to the baseline physiological response; determine the second lead has migrated if the characteristic of the EMG signal at the subsequent time increased from the baseline characteristic of the EMG signal; and suspend the neurostimulation therapy module to selectively deliver neurostimulation to the patient based on determining whether the second lead has migrated.
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Specification