Implantable lead with a band stop filter having a capacitor in parallel with an inductor embedded in a dielectric body
First Claim
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1. An implantable lead, comprising:
- a) at least one lead wire having a length extending from a proximal end to a distal end, wherein the proximal end of the lead wire is electrically connectable to a medical device and the distal end is contactable with biological cells; and
b) at least one band stop filter in series with the lead wire somewhere along the length thereof, wherein the band stop filter comprises;
i) a dielectric body having a tubular shape comprising a dielectric length extending from a first end to a second end, and a dielectric thickness extending from an inner surface to an outer surface of the dielectric body, the inner and outer surfaces meeting the first and second ends, wherein a bore defined by the inner surface extends through the dielectric body from the first end to the second end thereof,ii) first and second metallizations in contact with the respective first and second dielectric ends,iii) a capacitor comprising at least one active electrode plate extending from the first metallization partway along the dielectric length without meeting the second metallization, and at least one ground electrode plate extending from the second metallization partway along the dielectric length without meeting the first metallization, wherein the active and ground electrode plates are disposed within the inner and outer surfaces of the dielectric body, andiv) an inductor comprising at least one conductive inductor trace disposed within the dielectric body and in electrical continuity from the first metallization at the first end to the second metallization at the second end of the dielectric body, the inductor being spaced from the active and ground electrode plates to thereby provide the inductor and capacitor electrically connected in parallel between the first and second metallizations contacting the respective first and second dielectric ends.
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Abstract
A TANK filter is provided for a lead wire of an active medical device (AMD). The TANK filter includes a capacitor in parallel with an inductor. The parallel capacitor and inductor are placed in series with the lead wire of the AMD, wherein values of capacitance and inductance are selected such that the TANK filter is resonant at a selected frequency. In a preferred form, the TANK filter reduces or even eliminates the use of ferro-magnetic materials, and instead uses non-ferromagnetic materials so as to reduce or eliminate MRI image artifacts or the force or torque otherwise associated during an MRI image scan.
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Citations
45 Claims
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1. An implantable lead, comprising:
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a) at least one lead wire having a length extending from a proximal end to a distal end, wherein the proximal end of the lead wire is electrically connectable to a medical device and the distal end is contactable with biological cells; and b) at least one band stop filter in series with the lead wire somewhere along the length thereof, wherein the band stop filter comprises; i) a dielectric body having a tubular shape comprising a dielectric length extending from a first end to a second end, and a dielectric thickness extending from an inner surface to an outer surface of the dielectric body, the inner and outer surfaces meeting the first and second ends, wherein a bore defined by the inner surface extends through the dielectric body from the first end to the second end thereof, ii) first and second metallizations in contact with the respective first and second dielectric ends, iii) a capacitor comprising at least one active electrode plate extending from the first metallization partway along the dielectric length without meeting the second metallization, and at least one ground electrode plate extending from the second metallization partway along the dielectric length without meeting the first metallization, wherein the active and ground electrode plates are disposed within the inner and outer surfaces of the dielectric body, and iv) an inductor comprising at least one conductive inductor trace disposed within the dielectric body and in electrical continuity from the first metallization at the first end to the second metallization at the second end of the dielectric body, the inductor being spaced from the active and ground electrode plates to thereby provide the inductor and capacitor electrically connected in parallel between the first and second metallizations contacting the respective first and second dielectric ends. - 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. An implantable lead, comprising:
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a) at least one implantable lead wire having a length extending from a proximal end to a distal end, wherein the proximal end of the lead wire is electrically connectable to a medical device and the distal end is contactable with biological cells; and b) at least one band stop filter in series with the lead wire somewhere along the length thereof, wherein the band stop filter comprises; i) a dielectric body having a tubular shape comprising a dielectric length extending from a proximal end to a distal end, and a dielectric thickness extending from an inner surface to an outer surface of the dielectric body, the inner and outer surfaces meeting the proximal and distal dielectric ends, wherein a bore extends through the dielectric body from the proximal end to the distal end thereof, ii) inner and outer metallizations in contact with the respective inner and outer dielectric surfaces, iii) a capacitor comprising at least one active electrode plate extending from the inner metallization partway along the dielectric thickness without meeting the outer metallization, and at least one ground electrode plate extending from the outer metallization partway along the dielectric thickness without meeting the inner metallization, or the capacitor comprising the at least one active electrode plate extending from the outer metallization partway along the dielectric thickness without meeting the inner metallization, and the at least one ground electrode plate extending from the inner metallization partway along the dielectric thickness without meeting the outer metallization, wherein the active and ground electrode plates are at an interior location in the dielectric length with respect to the proximal and distal dielectric ends, and iv) an inductor comprising at least one conductive inductor trace extending in the dielectric thickness within the inner and outer dielectric surfaces and in electrical continuity from the inner metallization to the outer metallization, the inductor being spaced from the active and ground electrode plates to thereby provide the inductor and capacitor electrically connected in parallel between the inner and outer metallizations contacting the respective inner and outer dielectric surfaces. - View Dependent Claims (23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34)
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35. A band stop filter, comprising:
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a) a dielectric body having a tubular shape comprising a dielectric length extending from a first end to a second end, and a dielectric thickness extending from an inner surface to an outer surface, the inner and outer surfaces meeting the first and second ends of the dielectric body, wherein a bore extends through the dielectric body from the first end to the second end thereof, b) first and second metallizations in contact with the respective first and second dielectric ends, c) a capacitor comprising at least one active plate extending from the first metallization partway along the dielectric length without meeting the second metallization, and at least one ground electrode plate extending from the second metallization partway along the dielectric length without meeting the second metallization, wherein the active and ground electrode plates are at an interior location in the dielectric thickness with respect to the inner and outer dielectric surfaces, and d) an inductor comprising at least one conductive inductor trace extending in the dielectric thickness between the inner and outer dielectric surfaces and in electrical continuity from the first metallization at the first dielectric end to the second metallization at the second dielectric end, the inductor being spaced from the active and ground electrode plates to thereby provide the inductor and capacitor electrically connected in parallel between the first and second metallizations contacting the respective first and second dielectric ends. - View Dependent Claims (36, 37, 38)
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39. A band stop filter, comprising:
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a) a dielectric body having a tubular shape comprising a dielectric length extending from a first end to a second end, and a dielectric thickness extending from an inner surface to an outer surface, the inner and outer surfaces meeting the proximal and distal ends of the dielectric body, wherein a bore extends through the dielectric body from the first end to the second end thereof, b) inner and outer metallizations in contact with the respective inner and outer dielectric surfaces, c) a capacitor comprising at least one active electrode plate extending from the inner metallization partway along the dielectric thickness without meeting the outer metallization, and at least one ground electrode plate extending from the outer metallization partway along the dielectric thickness without meeting the inner metallization, wherein the active and ground electrode plates are at an interior location in the dielectric length with respect to the first and second dielectric ends, and d) an inductor comprising at least one conductive inductor trace extending in the dielectric thickness between the inner and outer surfaces thereof and in electrical continuity from the inner metallization to the outer metallization, the inductor being spaced from the active and ground electrode plates to thereby provide the inductor and capacitor electrically connected in parallel between the first and second metallizations contacting the respective first and second dielectric ends. - View Dependent Claims (40, 41, 42)
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43. An implantable lead, comprising:
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a) at least one lead wire having a length extending from a proximal end to a distal end, wherein the proximal end of the lead wire is electrically connectable to a medical device and the distal end is contactable with biological cells; and b) at least one band stop filter in series with the lead wire somewhere along the length thereof, wherein the band stop filter comprises; i) a dielectric body having a tubular shape comprising a dielectric length extending from a first dielectric end to a second dielectric end, and a dielectric thickness extending from an inner dielectric surface to an outer dielectric surface of the dielectric body, the inner and outer dielectric surfaces meeting the first and second dielectric ends, wherein a bore extends through the dielectric body from the first end to the second end thereof, ii) first and second metallizations in contact with the respective first and second dielectric ends, iii) a capacitor comprising at least one active plate extending from the first metallization partway along the dielectric length without meeting the second metallization, and at least one ground electrode plate extending from the second metallization partway along the dielectric length without meeting the first metallization, wherein the active and ground electrode plates are at an interior location in the dielectric thickness with respect to the inner and outer dielectric surfaces, and iv) an inductor comprising at least one conductive inductor trace supported on at least one of the inner and outer dielectric surfaces and in electrical continuity from the first metallization at the first dielectric end to the second metallization at the second dielectric end, the inductor being spaced from the active and ground electrode plates to thereby provide the inductor and capacitor electrically connected in parallel between the first and second metallizations contacting the respective first and second dielectric ends.
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44. An implantable lead, comprising:
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a) at least one implantable lead wire having a length extending from a proximal end to a distal end, wherein the proximal end of the lead wire is electrically connectable to a medical device and the distal end is contactable with biological cells; and b) at least one band stop filter in series with the lead wire somewhere along the length thereof, wherein the band stop filter comprises; i) a dielectric body having a tubular shape comprising a dielectric length extending from a first end to a second end, and a dielectric thickness extending from an inner surface to an outer surface, the inner and outer surfaces meeting the proximal and distal ends of the dielectric body, wherein a bore extends through the dielectric body from the proximal end to the distal end thereof, ii) inner and outer metallizations in contact with the respective inner and outer dielectric surfaces, iii) a capacitor comprising at least one active electrode plate extending from the inner metallization partway along the dielectric thickness without meeting the outer metallization, and at least one ground electrode plate extending from the outer metallization partway along the dielectric thickness without meeting the inner metallization, or the capacitor comprising the at least one active electrode plate extending from the outer metallization partway along the dielectric thickness without meeting the inner metallization, and the at least one ground electrode plate extending from the inner metallization partway along the dielectric thickness without meeting the outer metallization, wherein the active and ground electrode plates are at an interior location in the dielectric length with respect to the first and second dielectric ends, and iv) an inductor comprising at least one conductive inductor trace supported on at least one of the first and second dielectric surfaces and in electrical continuity from the inner metallization to the outer metallization, the inductor being spaced from the active and ground electrode plates to thereby provide the inductor and capacitor electrically connected in parallel between the inner and outer metallizations contacting the respective inner and outer dielectric surfaces.
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45. An implantable lead, comprising:
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a) at least one lead wire having a length extending from a proximal end to a distal end, wherein the proximal end of the lead wire is electrically connectable to a medical device and the distal end is contactable with biological cells; and b) at least one band stop filter in series with the lead wire somewhere along the length thereof, wherein the band stop filter comprises; i) a dielectric body having a tubular shape comprising a dielectric length extending from a first end to a second end, and a dielectric thickness extending from an inner surface to an outer surface, the inner and outer surfaces meeting the proximal and distal ends of the dielectric body, wherein a bore extends through the dielectric body from the first end to the second end thereof, ii) proximal and distal metallizations in contact with the respective proximal and distal dielectric ends, iii) a capacitor comprising at least one active electrode plate extending from the inner metallization partway along the dielectric thickness without meeting the outer metallization, and at least one ground electrode plate extending from the outer metallization partway along the dielectric thickness without meeting the inner metallization, or the capacitor comprising the at least one active electrode plate extending from the outer metallization partway along the dielectric thickness without meeting the inner metallization, and the at least one ground electrode plate extending from the inner metallization partway along the dielectric thickness without meeting the outer metallization, wherein the active and ground electrode plates are at an interior location in the dielectric length with respect to the proximal and distal dielectric ends, and iv) at least one conductive trace coiling around the bore in the dielectric thickness between the inner and outer dielectric surfaces and in electrical continuity from the first metallization at the first dielectric end to the second metallization at the second dielectric end to thereby provide the inductor and capacitor electrically connected in parallel between the first and second metallizations contacting the respective first and second dielectric ends.
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Specification