Capacitor and inductor elements physically disposed in series whose lumped parameters are electrically connected in parallel to form a bandstop filter
First Claim
1. A lead wire system for use with an active implantable medical device, the lead wire system comprising:
- a) an implantable lead comprising at least one lead wire having a length extending to and meeting with a proximal lead end and a distal lead end;
b) a bandstop filter connected in series with the lead wire somewhere along the length thereof, the bandstop filter comprising a capacitor segment having a capacitor segment first end and a capacitor segment second end, and an inductor segment having an inductor segment first end and an inductor segment second end, wherein the capacitor segment first end is electrically conductively connected to the inductor segment first end, and the capacitor segment second end is electrically conductively connected to the inductor segment second end so that the inductor and the capacitor are electrically coupled to one another in parallel;
c) wherein the bandstop filter is electrically connected in series with the lead wire somewhere along the length thereof with one of the capacitor and the inductor residing at a proximal location along the length of the lead wire with respect to the other of the capacitor and the inductor residing at a distal location along the length; and
d) wherein the inductor segment has an inductor segment inductance and an inductor segment resistance, and the capacitor segment has a capacitor segment capacitance and a capacitor segment resistance.
6 Assignments
0 Petitions
Accused Products
Abstract
One or more inductors and one or more capacitors are physically disposed relative to one another in series and are electrically connected to one another in parallel to form a bandstop filter. Chip inductors and chip capacitors having spaced apart conductive terminals are physically arranged in end-to-end abutting relation to minimize electrical potential between adjacent conductive terminals. The bandstop filter may be hermetically sealed within a biocompatible container for use with an implantable lead or electrode of a medical device. The values of the inductors and the capacitors are selected such that the bandstop filter is resonant at one or more selected frequencies, such as an MRI pulsed frequency.
88 Citations
20 Claims
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1. A lead wire system for use with an active implantable medical device, the lead wire system comprising:
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a) an implantable lead comprising at least one lead wire having a length extending to and meeting with a proximal lead end and a distal lead end; b) a bandstop filter connected in series with the lead wire somewhere along the length thereof, the bandstop filter comprising a capacitor segment having a capacitor segment first end and a capacitor segment second end, and an inductor segment having an inductor segment first end and an inductor segment second end, wherein the capacitor segment first end is electrically conductively connected to the inductor segment first end, and the capacitor segment second end is electrically conductively connected to the inductor segment second end so that the inductor and the capacitor are electrically coupled to one another in parallel; c) wherein the bandstop filter is electrically connected in series with the lead wire somewhere along the length thereof with one of the capacitor and the inductor residing at a proximal location along the length of the lead wire with respect to the other of the capacitor and the inductor residing at a distal location along the length; and d) wherein the inductor segment has an inductor segment inductance and an inductor segment resistance, and the capacitor segment has a capacitor segment capacitance and a capacitor segment resistance. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
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19. A lead wire system, which comprises:
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a) at least one lead wire having length extending to and meeting with a proximal lead end and a distal lead end; b) a bandstop filter connected in series with the lead wire and comprising a capacitor segment having a capacitor segment first end and a capacitor segment second end, and an inductor segment having an inductor segment first end and an inductor segment second end, wherein the capacitor segment first end is electrically conductively connected to the inductor segment first end, and the capacitor segment second end is electrically conductively connected to the inductor segment second end so that the inductor and the capacitor are electrically coupled to one another in parallel; and c) wherein the bandstop filter is electrically connected in series with the lead wire somewhere along the length thereof with one of the capacitor and the inductor residing at a proximal location along the length of the lead wire with respect to the other of the capacitor and the inductor residing at a distal location along the length.
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20. An active implantable medical device lead wire system, which comprises:
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a) an implantable lead comprising at least one lead wire having a length extending to and meeting with a proximal lead end and a distal lead end; b) a bandstop filter connected to the lead wire and comprising a capacitor segment having a capacitor segment first end and a capacitor segment second end, and an inductor segment having an inductor segment first end and an inductor segment second end, wherein the capacitor segment first end is electrically conductively connected to the inductor segment first end, and the capacitor segment second end is electrically conductively connected to the inductor segment second end so that the inductor and the capacitor are electrically coupled to one another in parallel; c) wherein the bandstop filter is electrically connected in series with the lead wire somewhere along the length thereof with one of the capacitor and the inductor residing at a proximal location along the length of the lead wire with respect to the other of the capacitor and the inductor residing at a distal location along the length; d) wherein the inductor segment has an inductor segment inductance and an inductor segment resistance, and the capacitor segment has a capacitor segment capacitance and a capacitor segment resistance; and e) wherein the capacitor segment first end and the inductor segment first end are electrically conductively connectable to an external portion of a terminal pin of a hermetic seal, and the capacitor segment second end and the inductor segment second end are at the proximal end of the lead wire.
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Specification