Frequency selective passive component networks for active implantable medical devices utilizing an energy dissipating surface
First Claim
Patent Images
1. A passive component network for an active implantable medical device, comprising:
- a) an active implantable medical device (AIMD) comprising an electrically or thermally conductive housing, wherein the AIMD is configured to be connectable to a lead, the connectable lead comprising a length extending between and to a proximal end adjacent to the AIMD housing and a tissue-stimulating or biological-sensing electrode at a distal tip end; and
b) a frequency selective energy diversion circuit housed inside the AIMD housing for diverting high-frequency energy away from the lead connectable to the AIMD housing for dissipation of the high-frequency energy;
c) 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 the housing for an active implantable medical device (AIMD) which serves as an energy dissipating surface. This is accomplished through broadband filtering or by resonant filtering. In a passive component network for an AIMD, a frequency selective energy diversion circuit is provided for diverting high-frequency energy away from an AIMD lead to the AIMD housing for dissipation of said high-frequency energy.
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Citations
56 Claims
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1. A passive component network for an active implantable medical device, comprising:
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a) an active implantable medical device (AIMD) comprising an electrically or thermally conductive housing, wherein the AIMD is configured to be connectable to a lead, the connectable lead comprising a length extending between and to a proximal end adjacent to the AIMD housing and a tissue-stimulating or biological-sensing electrode at a distal tip end; and b) a frequency selective energy diversion circuit housed inside the AIMD housing for diverting high-frequency energy away from the lead connectable to the AIMD housing for dissipation of the high-frequency energy; c) wherein the high frequency energy comprises an MRI frequency. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21)
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22. A passive component network for an active implantable medical device, comprising:
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a) an active implantable medical device (AIMD) comprising an electrically or thermally conductive housing, wherein the AIMD is configured to be connectable to a lead, the connectable lead comprising a length extending between and to a proximal end adjacent to the AIMD housing and a tissue-stimulating or biological-sensing electrode at a distal tip end; b) a frequency selective energy diversion circuit housed inside the AIMD housing for diverting high-frequency energy away from the connectable lead to the AIMD housing for dissipation of the high-frequency energy; and c) an impeding circuit associated with the diversion circuit, the impeding circuit providing for raising the high-frequency impedance of the connectable lead or a leadwire, the impeding circuit being disposed between the diversion circuit and AIMD electronic circuits; d) wherein the impeding circuit comprises at least one inductor; and e) wherein the at least one inductor comprises an inductor wire wound onto a ferromagnetic or non-ferromagnetic mandrel.
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23. A passive component network for an active implantable medical device, comprising:
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a) an active implantable medical device (AIMD) comprising an electrically or thermally conductive housing, wherein the AIMD is configured to be connectable to a lead, the connectable lead comprising a length extending between and to a proximal end adjacent to the AIMD housing and a tissue-stimulating or biological-sensing electrode at a distal tip end; and b) a frequency selective energy diversion circuit for diverting high-frequency energy away from the connectable lead to the AIMD housing for dissipation of the high-frequency energy; c) wherein the diversion circuit is disposed within the AIMD housing; and d) wherein the active implantable medical device (AIMD) comprises a deep brain stimulator.
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24. A passive component network for an active implantable medical. device, comprising:
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a) an active implantable medical device (AIMD) comprising an electrically or thermally conductive housing, wherein the AIMD is configured to be connectable to a lead, the connectable lead comprising a length extending between and to a proximal end adjacent to the AIMD housing and a tissue-stimulating or biological-sensing electrode at a distal tip end; and b) a frequency selective energy diversion circuit housed inside the AIMD for diverting high-frequency energy away from the connectable lead to the AIMD housing for dissipation of said high-frequency energy; c) wherein the frequency selective energy diversion circuit is selected from the group consisting of a capacitor, an inductor, a Pi filter, a T filter, an LL filter, and an “
n”
element filter.
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25. A decoupling circuit for an active implantable medical device, comprising:
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a) an active implantable medical device (AIMD) comprising an electrically or thermally conductive housing; b) a header block attached to the conductive housing; c) an implantable lead receptacle disposed within the header block; d) an AIMD electronic circuit disposed within the conductive housing and electrically coupled to the implantable lead receptacle by a conductor; and e) a frequency selective energy diversion circuit electrically coupled to the conductor for diverting high-frequency MRI energy away from the implantable lead receptacle or conductor to the AIMD housing for dissipation of the high-frequency MRI energy. - View Dependent Claims (26, 27, 28, 29, 30, 31)
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32. A decoupling circuit for an active implantable medical device, comprising:
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a) an active implantable medical device (AIMD) comprising an electrically or thermally conductive housing; b) a header block attached to the conductive housing; c) an implantable lead receptacle disposed within the header block; d) an AIMD electronic circuit disposed within the conductive housing and electrically coupled to the implantable lead receptacle by a conductor; e) a frequency selective energy diversion circuit electrically coupled to the conductor for diverting high-frequency MRI energy away from the implantable lead receptacle or conductor to the AMID housing for dissipation of the high-frequency MRI energy; and f) an impeding circuit electrically connected in series along the conductor and disposed between the diversion circuit and the AIMD electronic circuit for raising the high-frequency impedance of the implantable lead receptacle or the conductor. - View Dependent Claims (33, 34, 35, 36, 37)
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38. A decoupling circuit for an active implantable medical device, comprising:
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a) an active implantable medical device (AMID) comprising an electrically or thermally conductive housing and an implantable lead receptacle; and b) a frequency selective energy diversion circuit for diverting high-frequency MRI energy away from the implantable lead receptacle to the AIMD housing for dissipation of the high-frequency MRI energy. - View Dependent Claims (39, 40, 41, 42, 43, 44)
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45. A decoupling circuit for an active implantable medical device, comprising:
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a) an active implantable medical device (AIMD) comprising an electrically or thermally conductive housing and an implantable lead receptacle; b) an AIMD electronic circuit disposed within the conductive housing; c) a conductor electrically coupling the implantable lead receptacle to the AIMD electronic circuit, the conductor defined as comprising a first node and a second node disposed in series along the conductor, the first node disposed closer to the implantable lead receptacle and the second node disposed closer to the AIMD electronic circuit; d) a first frequency selective energy diversion circuit for diverting high-frequency MRI energy away from the implantable lead receptacle to the conductive housing for dissipation of high-frequency MRI energy, the first diversion circuit electrically connected between the first node and the conductive housing; e) an impeding circuit for raising the high-frequency impedance of the implantable lead receptacle or conductor, the impeding circuit electrically connected in series along the conductor disposed between the first and second nodes; and f) a second frequency selective energy diversion circuit electrically connected between the second node and the conductive housing. - View Dependent Claims (46, 47, 48, 49)
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50. An energy dissipating surface housing for an active implantable medical device, comprising:
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a) an active implantable medical device (AMID) comprising an electrically or thermally conductive housing, wherein the conductive housing comprises an energy dissipating surface; b) a header block attached to the conductive housing; c) an implantable lead receptacle disposed within the header block; d) an AIMD electronic circuit disposed within the conductive housing and electrically coupled to the implantable lead receptacle by a conductor; and e) a frequency selective energy diversion circuit electrically coupled between the conductor and the conductive housing for diverting high-frequency MRI energy away from the implantable lead receptacle or conductor to the AIMD housing for dissipation of the high-frequency MRI energy. - View Dependent Claims (51, 52, 53, 54, 55, 56)
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Specification