Implantable electrical lead including a cooling assembly to dissipate MRI induced electrode heat
First Claim
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1. An implantable medical device lead comprising:
- an insulative lead body;
an outer conductive coil extending through the lead body, the outer conductive coil coupled to a proximal electrode at a distal end of the outer conductive coil;
an inner conductive coil extending coaxially with the outer conductive coil and coupled to a distal electrode at a distal end of the inner conductive coil; and
a cooling assembly thermally coupled to the distal electrode to dissipate heat generated at the distal electrode during exposure to magnetic resonance imaging (MRI) fields, wherein the cooling assembly comprises one or more thermoelectric elements encased in a thermally conductive biocompatible material, and wherein the one or more thermoelectric elements are configured to electrically couple to an energy storage device that stores energy generated by the one or more thermoelectric elements when dissipating heat from the distal electrode.
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Abstract
An implantable medical device lead includes an insulative lead body, an outer conductive coil extending through the lead body, and an inner conductive coil extending coaxially with the outer conductive coil. The outer conductive coil is coupled to a proximal electrode at a distal end of the outer conductive coil, and the inner conductive coil is coupled to a distal electrode at a distal end of the inner conductive coil. A cooling assembly is thermally coupled to the distal electrode to dissipate heat generated at the distal electrode during exposure to magnetic resonance imaging (MRI) fields.
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Citations
17 Claims
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1. An implantable medical device lead comprising:
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an insulative lead body; an outer conductive coil extending through the lead body, the outer conductive coil coupled to a proximal electrode at a distal end of the outer conductive coil; an inner conductive coil extending coaxially with the outer conductive coil and coupled to a distal electrode at a distal end of the inner conductive coil; and a cooling assembly thermally coupled to the distal electrode to dissipate heat generated at the distal electrode during exposure to magnetic resonance imaging (MRI) fields, wherein the cooling assembly comprises one or more thermoelectric elements encased in a thermally conductive biocompatible material, and wherein the one or more thermoelectric elements are configured to electrically couple to an energy storage device that stores energy generated by the one or more thermoelectric elements when dissipating heat from the distal electrode. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A medical device comprising:
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a pulse generator including an energy storage device; and a lead including a lead body, an outer conductive coil extending through the lead body, and an inner conductive coil extending coaxially with the outer conductive coil, the outer conductive coil coupled to a proximal electrode at a distal end of the outer conductive coil, and the inner conductive coil coupled to a distal electrode at a distal end of the inner conductive coil; a cooling assembly thermally coupled to the distal electrode and electrically coupled to the pulse generator to dissipate heat generated at the distal electrode during exposure to magnetic resonance imaging (MRI) fields, wherein the cooling assembly comprises one or more thermoelectric elements encased in a thermally conductive biocompatible material, and wherein the one or more thermoelectric elements are electrically coupled to the energy storage device to store energy generated by the one or more thermoelectric elements when dissipating heat from the distal electrode. - View Dependent Claims (9, 10, 11, 12, 13)
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14. A medical device comprising:
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a pulse generator including an energy storage device; and a lead comprising; an insulative lead body; a conductor assembly extending through the lead body and including at least first, second, and third filars, wherein the first filar is coupled to the pulse generator at a proximal end of the first filar and to a distal electrode at a distal end of the first filar; and a cooling assembly thermally coupled to the distal electrode to dissipate heat generated at the distal electrode during exposure to magnetic resonance imaging (MRI) fields, the cooling assembly electrically coupled to the energy storage device via the second and third filars, wherein the energy storage device drives the cooling assembly to pull heat from the distal electrode, wherein the cooling assembly comprises one or more thermoelectric elements encased in a thermally conductive biocompatible material, wherein the cooling assembly generates energy when dissipating heat from the distal electrode, and wherein the energy generated by the cooling assembly is stored in the energy storage device. - View Dependent Claims (15, 16, 17)
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Specification