Implantable medical device conductor insulation and process for forming
First Claim
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1. An implantable medical device, comprising:
- a lead body extending from a proximal end to a distal end;
a plurality of conductors extending within the lead body from the proximal end to the distal end; and
a composite redundant insulation formed about each of the plurality of conductors and including a first insulative layer, a second insulative layer having a lower durometer and a lower flexural modulus than the first insulative layer, and a third insulative layer having a higher durometer and a higher flexural modulus than the second insulative layer.
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Abstract
A composite redundant insulation is formed about each of a plurality of conductors extending within a lead body of an implantable medical device. The insulation includes a first insulative layer, a second insulative layer having a lower durometer and a lower flexural modulus than the first insulative layer, and a third insulative layer having a higher durometer and a higher flexural modulus than the second insulative layer.
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Citations
33 Claims
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1. An implantable medical device, comprising:
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a lead body extending from a proximal end to a distal end;
a plurality of conductors extending within the lead body from the proximal end to the distal end; and
a composite redundant insulation formed about each of the plurality of conductors and including a first insulative layer, a second insulative layer having a lower durometer and a lower flexural modulus than the first insulative layer, and a third insulative layer having a higher durometer and a higher flexural modulus than the second insulative layer. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. An implantable medical device, comprising:
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a lead body extending from a proximal end to a distal end;
a plurality of conductors extending within the lead body from the proximal end to the distal end;
a first insulative layer formed about each of the plurality of conductors by a dip coating process and comprised of a hydrolytically stable polyimide;
a second insulative layer formed about the first insulative layer by a co-extrusion process and having a lower durometer and a lower flexural modulus than the first insulative layer; and
a third insulative layer formed about the second insulative layer by a co-extrusion process and having a higher durometer and a higher flexural modulus than the second insulative layer. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20, 21, 22)
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23. An implantable medical device, comprising:
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a housing adapted to generate electrical signals and including a connector block;
a lead body extending from a proximal end to a distal end and including a connector assembly terminating the proximal end and adapted to be coupled to the connector block of the housing;
a plurality of conductors coupled to the connector assembly and extending within the lead body, the plurality of conductors adapted to deliver the electrical signals from the housing, via the connector assembly, to an implant site; and
a composite redundant insulation formed about each of the plurality of conductors and including a first insulative layer, a second insulative layer having a lower durometer and a lower flexural modulus than the first insulative layer, and a third insulative layer having a higher durometer and a higher flexural modulus than the second insulative layer. - View Dependent Claims (24, 25, 26, 27, 28, 29, 30, 31, 32, 33)
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Specification