Frequency selective passive component networks for implantable leads of active implantable medical devices utilizing an energy dissipating surface
First Claim
Patent Images
1. A passive component network for an implantable leadwire of an active implantable medical device (AIMD), comprising:
- at least one leadwire having a length extending between and to a proximal end and a tissue-stimulating or biological-sensing electrode at a distal tip end; and
a frequency selective energy diversion circuit for diverting high frequency energy away from the electrode to a point or an area spaced from the electrode for dissipation of said high-frequency energy, wherein the high frequency energy comprises an MRI frequency.
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Abstract
Decoupling circuits are provided which transfer energy induced from an MRI pulsed RF field to an energy dissipating surface. This is accomplished through broadband filtering or by resonant filtering. In a passive component network for an implantable leadwire of an active implantable medical device, a frequency selective energy diversion circuit is provided for diverting high-frequency energy away from a leadwire electrode to a point or an area spaced from the electrode, for dissipation of high-frequency energy.
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Citations
61 Claims
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1. A passive component network for an implantable leadwire of an active implantable medical device (AIMD), comprising:
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at least one leadwire having a length extending between and to a proximal end and a tissue-stimulating or biological-sensing electrode at a distal tip end; and a frequency selective energy diversion circuit for diverting high frequency energy away from the electrode to a point or an area spaced from the electrode for dissipation of said high-frequency energy, wherein the high frequency energy comprises an MRI frequency. - View Dependent Claims (2, 3)
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4. A passive component network for an implantable leadwire of an active implantable medical device (AIMD), comprising:
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at least one leadwire having a length extending between and to a proximal end and a tissue-stimulating or biological-sensing electrode at a distal tip end; and a frequency selective energy diversion circuit for diverting high frequency energy away from the electrode to a point or an area spaced from the electrode for dissipation of said high-frequency energy, wherein the frequency selective energy diversion circuit comprises a low pass filter. - View Dependent Claims (6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48)
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5. A passive component network for an implantable leadwire of an active implantable medical device (AIMD), comprising:
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at least one leadwire having a length extending between and to a proximal end and a tissue-stimulating or biological-sensing electrode at a distal tip end; and a frequency selective energy diversion circuit for diverting high frequency energy away from the electrode to a point or an area spaced from the electrode for dissipation of said high-frequency energy, wherein the frequency selective energy diversion circuit comprises at least one series resonant LC trap filter. - View Dependent Claims (49)
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50. A passive component network for an implantable leadwire of an active implantable medical device (AIMD), comprising:
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at least one leadwire having a length extending between and to a proximal end and a tissue-stimulating or biological-sensing electrode at a distal tip end; a frequency selective energy diversion circuit for diverting high frequency energy away from the electrode to a point or an area spaced from the electrode for dissipation of said high-frequency energy; and an energy dissipating surface disposed at a point or an area spaced from the electrode; wherein the energy dissipating surface comprises a conductive housing; wherein said diversion circuit is mounted within said conductive housing; and wherein said active implantable medical device (AIMD) comprises a deep brain stimulator. - View Dependent Claims (51, 52)
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53. A passive component network for an implantable leadwire of an active implantable medical device (AIMD), comprising:
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at least one leadwire having a length extending between and to a proximal end and a tissue-stimulating or biological-sensing electrode at a distal tip end; a frequency selective energy diversion circuit for diverting high frequency energy away from the electrode to a point or an area spaced from the electrode for dissipation of said high-frequency energy; a leadwire housing supporting said leadwire distal tip electrode at one end thereof, said leadwire housing including a conductive housing portion forming an energy dissipating surface, and an insulator housing portion between said leadwire distal tip electrode and said conductive housing portion, wherein said distal tip electrode cooperates with said conductive and insulator housing portions to define a hermetically sealed package having said diversion circuit mounted therein; and an impeding circuit associated with said diversion circuit and mounted within said hermetically sealed package; wherein said at least one inductor comprises an inductor wire wound onto a ferromagnetic or non-ferromagnetic mandrel.
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54. A passive component network for an implantable leadwire of an active implantable medical device (AIMD), comprising:
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at least one leadwire having a length extending between and to a proximal end and a tissue-stimulating or biological-sensing electrode at a distal tip end; a frequency selective energy diversion circuit for diverting high frequency energy away from the electrode to a point or an area spaced from the electrode for dissipation of said high-frequency energy; and a leadwire housing supporting said leadwire distal tip electrode at one end thereof, said leadwire housing including a conductive housing portion forming an energy dissipating surface, and an insulator housing portion between said leadwire distal tip electrode and said conductive housing portion; wherein said distal tip electrode cooperates with said conductive and insulator housing portions to define a hermetically sealed package having said diversion circuit mounted therein; and wherein said diversion circuit comprises at least one LC trap filter coupled between said leadwire and said energy dissipating surface.
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55. A passive component network for an implantable leadwire of an active implantable medical device (AIMD), comprising:
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at least one leadwire having a length extending between and to a proximal end and a tissue-stimulating or biological-sensing electrode at a distal tip end; a frequency selective energy diversion circuit for diverting high frequency energy away from the electrode to a point or an area spaced from the electrode for dissipation of said high-frequency energy; a leadwire housing supporting said leadwire distal tip electrode at one end thereof, said leadwire housing including a conductive housing portion forming an energy dissipating surface, and an insulator housing portion between said leadwire distal tip electrode and said conductive housing portion, wherein said distal tip electrode cooperates with said conductive and insulator housing portions to define a hermetically sealed package having said diversion circuit mounted therein; and an impeding circuit associated with said diversion circuit and mounted within said hermetically sealed package, wherein said impeding circuit comprises at least one inductor; wherein said at least one inductor comprises a pair of inductor elements, said diversion circuit being coupled between said pair of inductor elements and said energy dissipating surface; and wherein said diversion circuit comprises a plurality of LC trap filters resonant respectively at different MRI frequencies.
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56. A passive component network for an implantable leadwire of an active implantable medical device (AIMD), comprising:
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at least one leadwire having a length extending between and to a proximal end and a tissue-stimulating or biological-sensing electrode at a distal tip end; a frequency selective energy diversion circuit for diverting high frequency energy away from the electrode to a point or an area spaced from the electrode for dissipation of said high-frequency energy; and an energy dissipating surface disposed at a point or an area spaced from the electrode; wherein the electrode comprises a paddle electrode disposed on one side of a paddle. - View Dependent Claims (57, 58, 59, 60, 61)
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Specification