MRI conditionally safe lead with low-profile conductor for longitudinal expansion
First Claim
Patent Images
1. An implantable electrical lead comprising:
- a lead body; and
a coil conductor extending within the lead body, the coil conductor configured such that the coil conductor has an axial stiffness substantially equal to an axial stiffness of the lead body adjacent to the coil conductor.
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Abstract
An implantable electrical lead includes a lead body and a multi-layer coil conductor extending within the lead body. The multi-layer coil conductor includes a first coil layer and a second coil layer disposed about the first coil layer. The first and second coil layers are configured such that the multi-layer coil conductor has an axial stiffness substantially equal to an axial stiffness of the lead body adjacent to the multi-layer coil conductor.
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Citations
20 Claims
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1. An implantable electrical lead comprising:
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a lead body; and a coil conductor extending within the lead body, the coil conductor configured such that the coil conductor has an axial stiffness substantially equal to an axial stiffness of the lead body adjacent to the coil conductor. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. An implantable electrical lead, comprising:
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a lead body having a longitudinal body lumen; an electrode coupled to the flexible body in the distal region; and a conductor extending within the longitudinal body lumen and coupled to the electrode, wherein at least one parameter of the coil conductor is configured such that the lead exhibits a predetermined axial stiffness or bending stiffness, wherein the at least one parameter of the coil conductor is at least one of a coil filar thickness, a number of filars, a filar material, a coil winding direction, or a coil diameter, and wherein the coil conductor is configured such that the coil conductor has an axial stiffness substantially equal to an axial stiffness of the lead body adjacent to the coil conductor. - View Dependent Claims (11, 12, 13, 14)
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15. An implantable electrical lead, comprising:
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a lead body; and a coil conductor extending within the lead body, wherein at least one parameter of the coil conductor is configured such that the coil conductor has a pre-determined spring constant along at least a portion of its length, and wherein the coil conductor is configured such that the coil conductor has an axial stiffness substantially equal to an axial stiffness of the lead body adjacent to the coil conductor. - View Dependent Claims (16, 17, 18, 19, 20)
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Specification