MRI CONDITIONALLY SAFE LEAD WITH LOW-PROFILE MULTI-LAYER CONDUCTOR FOR LONGITUDINAL EXPANSION
First Claim
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1. An implantable electrical lead, comprising:
- a flexible body having a proximal region including a proximal end, a distal region, and a longitudinal body lumen extending from the proximal end through the distal region;
a connector assembly configured to mechanically and electrically connect the implantable electrical lead to an implantable pulse generator;
an electrode coupled to the flexible body in the distal region; and
a multi-layer coil conductor extending within the longitudinal body lumen from the connector assembly to at least the electrode, the multi-layer coil conductor including;
a first coil layer; and
a second coil layer disposed about the first coil layer, wherein 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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Abstract
An implantable electrical lead having a flexible body and including a multi-layer coil conductor extending within the longitudinal body lumen from the connector assembly to at least the electrode, the multi-layer coil conductor including a first coil layer a second coil layer disposed about the first coil layer, wherein at least one parameter of the first and the second coil layer is configured such that the lead exhibits a predetermined axial stiffness or bending stiffness.
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Citations
18 Claims
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1. An implantable electrical lead, comprising:
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a flexible body having a proximal region including a proximal end, a distal region, and a longitudinal body lumen extending from the proximal end through the distal region; a connector assembly configured to mechanically and electrically connect the implantable electrical lead to an implantable pulse generator; an electrode coupled to the flexible body in the distal region; and a multi-layer coil conductor extending within the longitudinal body lumen from the connector assembly to at least the electrode, the multi-layer coil conductor including; a first coil layer; and a second coil layer disposed about the first coil layer, wherein 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. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. An implantable electrical lead, comprising:
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a flexible body having a proximal region including a proximal end, a distal region, and a longitudinal body lumen extending from the proximal end through the distal region; a connector assembly configured to mechanically and electrically connect the implantable electrical lead to an implantable pulse generator; an electrode coupled to the flexible body in the distal region; and a multi-layer coil conductor extending within the longitudinal body lumen from the connector assembly to at least the electrode, the multi-layer coil conductor including a first coil layer a second coil layer disposed about the first coil layer, wherein at least one parameter of the first and the second coil layer is configured such that the lead exhibits a predetermined axial stiffness or bending stiffness. - View Dependent Claims (9, 10, 11, 12, 13, 14)
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15. An implantable electrical lead, comprising:
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a flexible body having a proximal region including a proximal end, a distal region, and a longitudinal body lumen extending from the proximal end through the distal region; a connector assembly configured to mechanically and electrically connect the implantable electrical lead to an implantable pulse generator; an electrode coupled to the flexible body in the distal region; and a multi-layer coil conductor extending within the longitudinal body lumen from the connector assembly to at least the electrode, the multi-layer coil conductor including a first coil layer and a second coil layer disposed about the first coil layer, wherein at least one parameter of the first and the second coil layer is configured such that the multi-layer coil conductor has a pre-determined spring constant along at least a portion of its length. - View Dependent Claims (16, 17, 18)
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Specification