Implantable system with improved RF tolerance
First Claim
1. An implantable lead, comprising:
- a lead body having a proximal end and a distal end;
a plurality of electrodes disposed along the distal end of the lead body;
a plurality of terminal contacts disposed along the proximal end of the lead body;
a plurality of stimulation conductors extending along the lead body and electrically coupling the plurality of electrodes to the plurality of terminal contacts;
at least one diversionary terminal contact disposed along the proximal end of the lead body; and
at least one diversionary conductor, disposed within the lead body, extending at least partially along the length of the lead body, conductively attached directly and solely to a one of the at least one diversionary terminal contact, and not coupled to any of the electrodes, wherein the at least one diversionary conductor is configured and arranged to capacitively couple to the stimulation conductors and each diversionary conductor is a single wire that presents a lower impedance to RF energy at a preselected MRI frequency than any of the stimulation conductors.
1 Assignment
0 Petitions
Accused Products
Abstract
One embodiment is an implantable lead including a lead body having a proximal end and a distal end; multiple electrodes disposed along the distal end of the lead body; multiple terminal contacts disposed along the proximal end of the lead body; multiple stimulation conductors extending along the lead body and electrically coupling the electrodes to the terminal contacts; at least one diversionary terminal contact disposed along the proximal end of the lead body; and at least one diversionary conductor extending at least partially along the length of the lead body and coupled to the at least one diversionary terminal contact and not coupled to any of the electrodes. The at least one diversionary conductor is configured and arranged to capacitively couple to the stimulation conductors.
19 Citations
20 Claims
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1. An implantable lead, comprising:
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a lead body having a proximal end and a distal end; a plurality of electrodes disposed along the distal end of the lead body; a plurality of terminal contacts disposed along the proximal end of the lead body; a plurality of stimulation conductors extending along the lead body and electrically coupling the plurality of electrodes to the plurality of terminal contacts; at least one diversionary terminal contact disposed along the proximal end of the lead body; and at least one diversionary conductor, disposed within the lead body, extending at least partially along the length of the lead body, conductively attached directly and solely to a one of the at least one diversionary terminal contact, and not coupled to any of the electrodes, wherein the at least one diversionary conductor is configured and arranged to capacitively couple to the stimulation conductors and each diversionary conductor is a single wire that presents a lower impedance to RF energy at a preselected MRI frequency than any of the stimulation conductors. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. An implantable stimulation system, comprising:
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an implantable lead comprising a lead body having a proximal end and a distal end, a plurality of electrodes disposed along the distal end of the lead body, a plurality of terminal contacts disposed along the proximal end of the lead body; a plurality of stimulation conductors extending along the lead body and electrically coupling the plurality of electrodes to the plurality of terminal contacts, at least one diversionary terminal contact disposed along the proximal end of the lead body, and at least one diversionary conductor, disposed within the lead body, extending at least partially along the length of the lead body, conductively attached directly and solely to a one of the at least one diversionary terminal contact, and not coupled to any of the electrodes, wherein the at least one diversionary conductor is configured and arranged to capacitively couple to the stimulation conductors and each diversionary conductor is a single wire that presents a lower impedance to RF energy at a preselected MRI frequency than any of the stimulation conductors; and a control module comprising a housing, stimulation electronics disposed within the housing of the control module, a connector configured and arranged to receive the proximal end of the lead, a plurality of conductive contacts disposed within the connector and configured and arranged for contacting the plurality of terminal contacts of the lead and coupling the lead to the stimulation electronics, and at least one diversionary conductive contact disposed within the connector and configured and arranged for contacting the at least one diversionary terminal contact of the lead. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16)
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17. An implantable stimulation system, comprising:
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i) an implantable lead comprising a lead body having a proximal end and a distal end, a plurality of electrodes disposed along the distal end of the lead body, a plurality of terminal contacts disposed along the proximal end of the lead body; a plurality of stimulation conductors extending along the lead body and electrically coupling the plurality of electrodes to the plurality of terminal contacts, at least one diversionary terminal contact disposed along the proximal end of the lead body, and at least one diversionary conductor, disposed within the lead body, extending at least partially along the length of the lead body, conductively attached directly and solely to a one of the at least one diversionary terminal contact, and not coupled to any of the electrodes, wherein the at least one diversionary conductor is configured and arranged to capacitively couple to the stimulation conductors and each diversionary conductor is a single wire that presents a lower impedance to RF energy at a preselected MRI frequency than any of the stimulation conductors; ii) an implantable lead extension having a proximal end and a distal end and comprising a connector disposed at the distal end of the lead extension and configured and arranged to receive the proximal end of the lead, a plurality of conductive contacts disposed within the connector and configured and arranged for contacting the plurality of terminal contacts of the lead, at least one diversionary conductive contact disposed within the connector and configured and arranged for contacting the at least one diversionary terminal contact of the lead, a plurality of terminal contacts disposed along the proximal end of the lead extension; at least one diversionary terminal contact disposed along the proximal end of the lead extension, and a plurality of conductors extending along the lead extension and electrically coupling the plurality of conductive contacts to the plurality of terminal contacts and the at least one diversionary conductive contact to the at least one diversionary terminal contact; and iii) a control module comprising stimulation electronics disposed within the control module, a connector configured and arranged to receive the proximal end of the lead extension, a plurality of conductive contacts disposed within the connector and configured and arranged for contacting the plurality of terminal contacts of the lead extension and coupling the lead and lead extension to the stimulation electronics, and at least one diversionary conductive contact disposed within the connector and configured and arranged for contacting the at least one diversionary terminal contact of the lead extension. - View Dependent Claims (18, 19, 20)
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Specification