Leakage detection within implantable medical system conduction paths
First Claim
1. A method of detecting a signal leakage from a conduction path within an implantable medical lead, comprising:
- providing a stimulation signal from a first electrode corresponding to a first conduction path of the implantable medical lead;
sensing the stimulation signal as a first sensed signal via a second electrode corresponding to a second conduction path of the implantable medical device and sensing the stimulation signal as a second sensed signal via a third electrode corresponding to a third conduction path of the implantable medical lead, with the second and third conduction paths being coupled to a sensing circuit of an implantable medical device; and
detecting whether there is leakage between the first and second conduction paths and/or between the first and third conduction paths based on the difference in amplitude of the first and second sensed signals.
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Accused Products
Abstract
Leakage of signal between conduction paths of an implantable medical lead or lead and lead extension combination is detected. A stimulation signal is provided via one electrode. Two other electrodes sense the stimulation signal. A difference in amplitude of the two sensed signals is determined and based on this difference, leakage is detected. A sensing circuit may use differential amplification of the two signals and compare a resulting output signal to a leakage threshold. When the amplitude of the output signal exceeds the leakage threshold, then leakage is occurring between the conduction path providing the stimulation and one of the conduction paths used for sensing. Other techniques for determining leakage from the difference may also be used such as comparing the amplitudes of the two sensed signals and providing a value that is based on the comparison to indicate whether leakage is present.
24 Citations
29 Claims
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1. A method of detecting a signal leakage from a conduction path within an implantable medical lead, comprising:
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providing a stimulation signal from a first electrode corresponding to a first conduction path of the implantable medical lead; sensing the stimulation signal as a first sensed signal via a second electrode corresponding to a second conduction path of the implantable medical device and sensing the stimulation signal as a second sensed signal via a third electrode corresponding to a third conduction path of the implantable medical lead, with the second and third conduction paths being coupled to a sensing circuit of an implantable medical device; and detecting whether there is leakage between the first and second conduction paths and/or between the first and third conduction paths based on the difference in amplitude of the first and second sensed signals. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. An implantable medical system, comprising:
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an implantable medical device having a stimulation engine, having a sensing circuit and having a controller; and at least one implantable medical lead providing first, second, and third conduction paths, wherein the controller is configured to electrically couple the first conduction path to the stimulation engine to provide a stimulation signal onto the first conduction path, to electrically couple the second and third conduction paths to the sensing circuit where the second conduction path provides a first sensed signal and the third conduction path provides a second sensed signal, and to monitor an output of the sensing circuit to detect whether there is leakage between the first and second conduction paths and/or between the first and third conduction paths based on a difference in amplitude of the first and second sensed signals. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20)
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21. An implantable medical device, comprising:
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a stimulation engine; a sensing circuit; a first, a second, and a third lead connectors corresponding to first, second, and third conduction paths; and a controller that is configured to electrically couple the first lead connector to the stimulation engine to provide a stimulation signal onto the first lead connector, to electrically couple the second and third lead connectors to the sensing circuit to produce first and second sensed signals, and to monitor the output of the sensing circuit to detect whether there is leakage between the first and second conduction paths and/or between the first and third conduction paths based on a difference in amplitude of the first and second sensed signals. - View Dependent Claims (22, 23, 24, 25, 26, 27, 28, 29)
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Specification