LEAD WITH MRI COMPATIBLE DESIGN FEATURES
First Claim
1. A medical device, comprising:
- a pulse generator;
a lead electrically coupled to the pulse generator, the lead including an inner electrode conductor wire helically disposed along all or a portion of a length of the lead, the inner electrode conductor wire having a hollowed, multifilar configuration including six or more co-radially wound wire filars;
an outer electrode conductor wire helically disposed about and spaced apart from the inner electrode conductor wire along all or a portion of the length of the lead, the outer electrode conductor wire having a single or double filar configuration;
at least one insulation layer disposed radially about the inner electrode conductor wire; and
wherein the outer electrode conductor wire is configured to dissipate electromagnetic energy received by the lead during a magnetic resonance imaging procedure.
1 Assignment
0 Petitions
Accused Products
Abstract
Implantable medical leads with magnetic shielding and methods of shielding implantable leads from magnetic fields during medical procedures such as magnetic resonance imaging (MRI) are disclosed. An exemplary implantable medical lead includes a helically coiled inner electrode conductor wire, a helically coiled outer electrode conductor wire disposed radially about the inner electrode conductor wire, and at least one layer of insulation that electrically isolates the inner and outer electrode conductor wires. The inner electrode conductor wire can have a hollowed, multifilar configuration including six or more co-radially wound wire filars. The outer electrode conductor wire is electrically isolated from the inner electrode conductor wire, and may have either a single or double filar configuration.
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Citations
20 Claims
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1. A medical device, comprising:
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a pulse generator; a lead electrically coupled to the pulse generator, the lead including an inner electrode conductor wire helically disposed along all or a portion of a length of the lead, the inner electrode conductor wire having a hollowed, multifilar configuration including six or more co-radially wound wire filars; an outer electrode conductor wire helically disposed about and spaced apart from the inner electrode conductor wire along all or a portion of the length of the lead, the outer electrode conductor wire having a single or double filar configuration; at least one insulation layer disposed radially about the inner electrode conductor wire; and wherein the outer electrode conductor wire is configured to dissipate electromagnetic energy received by the lead during a magnetic resonance imaging procedure. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. An implantable medical lead, comprising:
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an inner electrode conductor wire helically disposed along all or a portion of a length of the lead, the inner electrode conductor wire having a hollowed, multifilar configuration including six or more co-radially wound wire filars, each of the wire filars of the inner electrode conductor wire formed of a silver-filled MP35N material; an outer electrode conductor wire helically disposed about and spaced apart from the inner electrode conductor wire along all or a portion of the length of the lead, the outer electrode conductor wire having a single or double filar configuration, each of the wire filars of the outer electrode conductor wire formed of a silver-filled MP35N material having a different silver content than the inner electrode conductor wire; at least one insulation layer disposed radially about the inner electrode conductor wire; and wherein the outer electrode conductor wire is configured to dissipate electromagnetic energy received by the lead during a magnetic resonance imaging procedure. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19)
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20. An implantable medical lead, comprising:
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an inner electrode conductor wire helically disposed along all or a portion of a length of the lead, the inner electrode conductor wire having a hollowed, multifilar configuration including six or more co-radially wound wire filars; an outer electrode conductor wire helically disposed about and spaced apart from the inner electrode conductor wire along all or a portion of the length of the lead, the outer electrode conductor wire having a single or double filar configuration, each of the wire filars of the outer electrode conductor wire having a wire diameter of between about 0.001 to 0.006 inches; at least one insulation layer disposed radially about the inner electrode conductor wire; and wherein the outer electrode conductor wire is configured to dissipate electromagnetic energy received by the lead during a magnetic resonance imaging procedure.
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Specification