Method and apparatus for shielding coating for MRI resistant electrode systems
First Claim
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1. A medical electrical lead, comprising:
- an elongated body;
a conductor extending within the elongated body; and
an electrically-conductive shield positioned adjacent at least a portion of the elongated body to shield the conductor from electromagnetic energy.
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Abstract
A medical electrical lead is disclosed comprising an electrically-conductive shield adjacent to at least a portion of the lead body. The shield is adapted to dissipate energy when the lead is subjected to an electromagnetic field. The shield may be further coupled to a housing of an implantable medical device to enhance energy dissipation capabilities. In another embodiment, a method comprises receiving electromagnetic energy within a shield coating surrounding a portion of the lead. The energy is then dissipated in a manner that protects tissue surrounding the lead from injury.
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Citations
22 Claims
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1. A medical electrical lead, comprising:
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an elongated body;
a conductor extending within the elongated body; and
an electrically-conductive shield positioned adjacent at least a portion of the elongated body to shield the conductor from electromagnetic energy. - View Dependent Claims (2, 3, 4, 5, 6, 8, 9, 11)
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- 7. The lead of claim 7, wherein the electrically-conductive shield is sized so that stiffness of the elongated body remains substantially unaffected by the electrically-conductive shield.
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12. An apparatus, comprising:
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an implantable medical device (IMD);
an electrical lead connected to the IMD; and
a shield coating adjacent to at least a portion of the exterior of the lead to reduce the effects of electromagnetic energy on the lead. - View Dependent Claims (13, 14)
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15. A method of shielding a medical electrical lead, comprising:
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providing an electrically-conductive shield proximate a portion of the lead;
subjecting the lead to electromagnetic energy; and
dissipating the energy with the electrically-conductive shield to thereby reduce the amount of energy received by the medical electrical lead.
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16. A method of shielding a medical electrical lead from radio-frequency energy, comprising:
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providing an electrical lead comprising at least one conductor surrounded by a layer of insulative material; and
applying a conductive shield coating to the lead covering at least a portion of the insulative material.
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17. A method of using a shielded medical electrical lead, comprising:
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inserting a lead comprising a conductive shield coating within a patient'"'"'s body;
exposing the shield coating to electromagnetic energy; and
utilizing the shield coating to dissipate the energy. - View Dependent Claims (18)
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19. A method of shielding a patient from the effects of electromagnetic energy absorbed by a medical electrical lead, comprising:
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providing a lead having at least one electrode wire surrounded by a layer of insulative material;
providing a shield coating over at least a portion of the insulative material, wherein the shield coating is adapted to receive electromagnetic energy, and wherein the shield coating is insulated from direct electrical communication with the electrode wire;
inserting the medical electrical lead within the body of a patient;
exposing the shield coating to electromagnetic energy; and
dissipating the energy received by the shield coating, thus reducing the quantity of electromagnetic energy absorbed by the at least one electrode wire.
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20. A method of manufacturing a shielded medical lead, comprising:
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providing a lead having at least one conductor surrounded by a layer of insulative material; and
applying a shield coating over at least a portion of the insulative material, wherein the shield coating is adapted to receive electromagnetic energy, and wherein the shield coating is insulated from direct electrical communication with the electrode wire. - View Dependent Claims (21, 22)
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Specification