Low resistance implantable electrical leads
First Claim
1. An implantable electrical lead, comprising:
- an electrically conductive wire core formed into a helical coil having individual coils with precompression between said coils, having distal and proximal ends;
a layer of an electrically conductive material formed around said wire core to provide electrical continuity between said wire core and said electrically conductive layer;
a biocompatible, electrically insulating sheath covering said layer of electrically conductive material formed on said wire core;
a first lead connector electrically connected to said proximal end of said wire core; and
an electrode electrically connected to said distal end of said wire core.
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Accused Products
Abstract
The present invention provides an implantable electrical lead having relatively low electrical resistance. The lead comprises: a wire core formed in a helical coil having pre-compression, and having distal and proximal ends; a layer of an electrically conductive material formed around the wire core such that there is electrical continuity between the wire core and the metal layer; a biocompatible, electrically insulating sheath covering the wire core; a first lead connector electrically connected to the proximal end of the wire core; and an electrode electrically connected to the distal end of the wire core. The wire core may have various cross-sectional configurations which increase the current conducting area of the wire core without increasing its outside diameter. In another embodiment, the electrical lead includes a wire core having a cross-sectional area which differs over the length of the core to enhance the fatigue resistance of the electrical lead. In yet another embodiment, the wire core may be wound in a helix having different pitches in different sections of the core.
458 Citations
13 Claims
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1. An implantable electrical lead, comprising:
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an electrically conductive wire core formed into a helical coil having individual coils with precompression between said coils, having distal and proximal ends; a layer of an electrically conductive material formed around said wire core to provide electrical continuity between said wire core and said electrically conductive layer; a biocompatible, electrically insulating sheath covering said layer of electrically conductive material formed on said wire core;
a first lead connector electrically connected to said proximal end of said wire core; andan electrode electrically connected to said distal end of said wire core. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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Specification