Multi-polar feedthrough array for analog communication with implantable medical device circuitry
First Claim
1. A multi-polar array for an implantable medical device, comprising;
- a titanium ferrule surrounding the outer periphery of the array and adapted to mechanically couple to a corresponding inner periphery of a titanium surface of an implantable medical device, said ferrule having a plurality of conductive pin-receiving bores formed through a major surface thereof, and wherein said ferrule consists of one of grade 4 titanium and grade 5 titanium;
a plurality of electrically insulative members sealingly disposed within each said plurality of bores and wherein each of said members is adapted to receive at least one conductive feedthrough pin;
a plurality of conductive feedthrough pins, each said pin disposed within one of said plurality of electrically insulative members; and
a plurality of capacitive elements adapted to reduce or eliminate electromagnetic interference from at least some of the plurality of the conductive feedthrough pins, effectively disposed proximate said at some of the plurality of the conductive feedthrough pinswherein the plurality of conductive feedthrough pins exceeds the plurality of capacitive elements by at least one pin, so that an analog and/or digital signal coupled to a non-capacitively filtered feedthrough pin substantially completely conducts via said pin.
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Accused Products
Abstract
An improved multi-polar feedthrough assembly employs a particular metallic ferrule material for improved dimensional stability during initial fabrication and sustained hermetic operation. In one aspect, the disclosure relates to implantable medical devices (IMDs) including an IMD enclosure fabricated with grade 2 titanium and having a ferrule material fabricated with grade 4 titanium or grade 5 titanium. In one form, the multi-polar feedthrough assembly includes a filtered feedthrough array (e.g., employing capacitive filters coupled to the electrically conductive pins or serpentine conductors of the array). According to another aspect, the improved multi-polar feedthrough assembly incorporates additional pins, thus increasing the footprint of the assembly, and the additional pins provide analog electrical communication between operative circuitry inside an IMD and analog components external to the IMD.
59 Citations
13 Claims
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1. A multi-polar array for an implantable medical device, comprising;
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a titanium ferrule surrounding the outer periphery of the array and adapted to mechanically couple to a corresponding inner periphery of a titanium surface of an implantable medical device, said ferrule having a plurality of conductive pin-receiving bores formed through a major surface thereof, and wherein said ferrule consists of one of grade 4 titanium and grade 5 titanium; a plurality of electrically insulative members sealingly disposed within each said plurality of bores and wherein each of said members is adapted to receive at least one conductive feedthrough pin; a plurality of conductive feedthrough pins, each said pin disposed within one of said plurality of electrically insulative members; and a plurality of capacitive elements adapted to reduce or eliminate electromagnetic interference from at least some of the plurality of the conductive feedthrough pins, effectively disposed proximate said at some of the plurality of the conductive feedthrough pins wherein the plurality of conductive feedthrough pins exceeds the plurality of capacitive elements by at least one pin, so that an analog and/or digital signal coupled to a non-capacitively filtered feedthrough pin substantially completely conducts via said pin. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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Specification