MRI-compatible implantable lead having a heat spreader and method of using same
First Claim
1. An implantable lead, comprising:
- a lead body, having a distal end and a proximal end, configured to be implanted in a patient;
a header assembly provided at the distal end of the lead body, the header assembly including a tissue engaging end and a housing having an internal chamber and an outer surface that includes a peripheral recess extending thereabout;
an electrode provided on the header assembly, the electrode configured to deliver stimulating pulses;
a resonant inductor located within the chamber of the header housing; and
an electrically floating heat spreader being located in the peripheral recess about the exterior perimeter of the housing, the heat spreader being located proximate to the resonant inductor and positioned on the header assembly to cover at least a portion of the resonant inductor, the heat spreader being thermally coupled to the resonant inductor to convey thermal energy away from the resonant inductor and the header assembly.
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Accused Products
Abstract
An implantable lead is provided that comprises a lead body and a header assembly. The lead body has a distal end and a proximal end. The lead body is configured to be implanted in a patient. The header assembly is provided at the distal end of the lead body and includes an internal chamber and a tissue engaging end. An electrode is provided on the header assembly. The electrode is configured to deliver a stimulating pulse. A resonant inductor is located within the chamber in the header assembly. An electrically floating heat spreader is provided on the header assembly. The heat spreader is located proximate to the resonant inductor and is positioned on the header assembly to cover at least a portion of the resonant inductor. The heat spreader is thermally coupled to the resonant inductor to convey thermal energy away from the header assembly.
37 Citations
16 Claims
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1. An implantable lead, comprising:
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a lead body, having a distal end and a proximal end, configured to be implanted in a patient; a header assembly provided at the distal end of the lead body, the header assembly including a tissue engaging end and a housing having an internal chamber and an outer surface that includes a peripheral recess extending thereabout; an electrode provided on the header assembly, the electrode configured to deliver stimulating pulses; a resonant inductor located within the chamber of the header housing; and an electrically floating heat spreader being located in the peripheral recess about the exterior perimeter of the housing, the heat spreader being located proximate to the resonant inductor and positioned on the header assembly to cover at least a portion of the resonant inductor, the heat spreader being thermally coupled to the resonant inductor to convey thermal energy away from the resonant inductor and the header assembly. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 13, 14, 15)
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12. An implantable lead, comprising:
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a lead body, having a distal end and a proximal end, configured to be implanted in a patient; a header assembly provided at the distal end of the lead body, the header assembly including an internal chamber and a tissue engaging end; an electrode provided on the header assembly, the electrode configured to deliver stimulating pulses; a resonant inductor located within the chamber of the header assembly; and an electrically floating heat spreader provided on the header assembly, the heat spreader being located proximate to the resonant inductor and positioned on the header assembly to cover at least a portion of the resonant inductor, the heat spreader being thermally coupled to the resonant inductor to convey thermal energy away from the header assembly, wherein the resonant inductor includes an insulated coil wrapped about a dielectric core, the core having a cavity formed therein and extending along the resonant inductor, the cavity retaining an inner heat spreader.
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16. An implantable lead, comprising:
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a lead body, having a distal end and a proximal end, configured to be implanted in a patient; a header assembly provided at the distal end of the lead body, the header assembly including an internal chamber and a tissue engaging end; an electrode provided on the header assembly, the electrode configured to deliver stimulating pulses; a resonant inductor located within the chamber of the header assembly; and an electrically floating heat spreader provided on the header assembly, the heat spreader being located proximate to the resonant inductor and positioned on the header assembly to cover at least a portion of the resonant inductor, the heat spreader being thermally coupled to the resonant inductor to convey thermal energy away from the header assembly, wherein the header assembly has a housing with a cavity formed therein, the heat spreader being embedded within the cavity in the housing.
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Specification