Conductive polymer sheath on defibrillator shocking coils
First Claim
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1. A lead comprising:
- a proximal portion;
a distal portion comprising a first tissue-stimulating electrode having an outer surface and an inner surface, at least a portion of the outer surface of the first electrode being adapted to stimulate cardiac tissue; and
a first flexible tubular sheath having an outer surface and an inner surface disposed over and in contact with at least a portion of the outer surface of the first tissue-stimulating electrode, the first sheath comprising polysiloxane urethane or polyether urethane and a conductive material, the first sheath being adapted to minimize adhesion and tissue ingrowth while passing sufficient electrical current to stimulate cardiac tissue when the lead is implanted in, on or about a heart.
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Abstract
An implantable lead includes a distal portion carrying a tissue stimulating electrode, at least a portion of its outer surface being adapted to stimulate cardiac tissue, wherein the electrode is covered by a pliable, electrically conductive sheath. The sheath is made of an electrically conductive material that does not rely on porosity for electrical charge transfer. The sheath is constructed and arranged to minimize or eliminate tissue ingrowth while passing sufficient electrical energy to stimulate the tissue.
80 Citations
17 Claims
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1. A lead comprising:
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a proximal portion; a distal portion comprising a first tissue-stimulating electrode having an outer surface and an inner surface, at least a portion of the outer surface of the first electrode being adapted to stimulate cardiac tissue; and a first flexible tubular sheath having an outer surface and an inner surface disposed over and in contact with at least a portion of the outer surface of the first tissue-stimulating electrode, the first sheath comprising polysiloxane urethane or polyether urethane and a conductive material, the first sheath being adapted to minimize adhesion and tissue ingrowth while passing sufficient electrical current to stimulate cardiac tissue when the lead is implanted in, on or about a heart. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
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Specification