Identifying lead insulation breaches and externalization of lead conductors
First Claim
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1. A medical device system comprising:
- an external system comprising;
at least two electrodes configured to contact a body of a patient; and
a signal generator electrically coupled to the at least two electrodes, the signal generator configured to generate a first electrical signal to be delivered by the at least two electrodes;
an implantable medical system comprising;
an implantable medical device; and
at least one implantable medical lead coupled to the implantable medical device,wherein the implantable medical system senses a second electrical signal induced on the at least one implantable medical lead by the first electrical signal generated by the signal generator; and
a processor configured to;
identify a characteristic of the second electrical signal that is indicative of at least one of a breach of outer insulation of a lead body of the at least one implantable medical lead or an externalization of a conductor of the at least one implantable medical lead; and
identify the at least one of a breach of the outer insulation of the lead body or an externalization of the conductor based on the identification of the characteristic of the second electrical signal.
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Abstract
A technique for identifying lead-related conditions, such as insulation breaches and/or externalization of lead conductors, includes analyzing characteristics of electrical signals generated on one or more electrode sensing vectors of the lead by a test signal to determine whether a lead-related condition exists. The characteristics of the electrical signals induced on the lead by the test signal may be significantly different on a lead having an insulation breach or externalized conductor than on a lead not having such lead-related conditions. As such, the implantable medical device may be subject to a known test signal and analyze the signals on the lead to detect lead-related conditions.
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Citations
26 Claims
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1. A medical device system comprising:
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an external system comprising; at least two electrodes configured to contact a body of a patient; and a signal generator electrically coupled to the at least two electrodes, the signal generator configured to generate a first electrical signal to be delivered by the at least two electrodes; an implantable medical system comprising; an implantable medical device; and at least one implantable medical lead coupled to the implantable medical device, wherein the implantable medical system senses a second electrical signal induced on the at least one implantable medical lead by the first electrical signal generated by the signal generator; and a processor configured to; identify a characteristic of the second electrical signal that is indicative of at least one of a breach of outer insulation of a lead body of the at least one implantable medical lead or an externalization of a conductor of the at least one implantable medical lead; and identify the at least one of a breach of the outer insulation of the lead body or an externalization of the conductor based on the identification of the characteristic of the second electrical signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. A method comprising:
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providing a first electrical signal generated by an external signal generator to a body of a patient via a pair of electrodes in contact with the body of the patient; sensing a second electrical signal induced on at least one implantable medical lead by the first electrical signal generated by the signal generator; identifying a characteristic of the second electrical signal that is indicative of at least one of a breach of outer insulation of a lead body of the at least one implantable medical lead or an externalization of a conductor of the at least one implantable medical lead; and identifying the at least one of a breach of the outer insulation of the lead body or an externalization of the conductor based on the identification of the characteristic of the second electrical signal. - View Dependent Claims (17, 18, 19, 20, 21, 22, 23)
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24. A medical device system comprising:
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means for generating a first electrical signal to be delivered to a body of a patient via a pair of electrodes in contact with the body of the patient; means for sensing a second electrical signal induced on at least one implantable medical lead by the first electrical signal; means for identifying a characteristic of the second electrical signal that is indicative of at least one of a breach of outer insulation of a lead body of the at least one implantable medical lead or an externalization of a conductor of the at least one implantable medical lead; and means for identifying the at least one of a breach of the outer insulation of the lead body or an externalization of the conductor based on the identification of the characteristic of the second electrical signal. - View Dependent Claims (25, 26)
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Specification