Epicardial screw-in lead
First Claim
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1. A bipolar cardiac lead, comprising:
- an elongated lead body having opposed proximal and distal end portions, and defining a longitudinal axis;
an electrode housing operatively associated with the distal end portion of the lead body for stimulating cardiac tissue;
a conductor coil extending through a lumen in the elongated lead body, the conductor coil being electrically connected to at least a connective portion of the electrode housing;
a helical fixation screw disposed within the electrode housing along an axis extending generally perpendicular to the longitudinal axis of the lead body and mounted for movement between an axially retracted position and an axially extended position for affixing the electrode housing to the cardiac tissue, wherein the helical fixation screw is electrically connected to the connective portion of the electrode housing; and
an insulating tube positioned radially outside of the helical fixation screw in the electrode housing for eluting at least one drug.
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Abstract
An epicardial screw-in lead is disclosed which includes an elongated lead body, an electrode housing at a distal end of the lead body for stimulating cardiac tissue, and a helical fixation screw within the electrode housing which can be extended to affix the electrode housing to the cardiac tissue. Preferably at least a portion of the helical fixation screw is electrically active. A lead implantation kit is also disclosed that can include the screw-in lead, a screwdriver tipped stylet for activating the screw, and a flexible guiding sheath for directing the tip of the stylet to the electrode housing.
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Citations
47 Claims
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1. A bipolar cardiac lead, comprising:
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an elongated lead body having opposed proximal and distal end portions, and defining a longitudinal axis; an electrode housing operatively associated with the distal end portion of the lead body for stimulating cardiac tissue; a conductor coil extending through a lumen in the elongated lead body, the conductor coil being electrically connected to at least a connective portion of the electrode housing; a helical fixation screw disposed within the electrode housing along an axis extending generally perpendicular to the longitudinal axis of the lead body and mounted for movement between an axially retracted position and an axially extended position for affixing the electrode housing to the cardiac tissue, wherein the helical fixation screw is electrically connected to the connective portion of the electrode housing; and an insulating tube positioned radially outside of the helical fixation screw in the electrode housing for eluting at least one drug. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22)
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23. A bipolar cardiac lead, comprising:
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an elongated lead body having opposed proximal and distal end portions, and defining a longitudinal axis; an electrode housing operatively associated with the distal end portion of the lead body, the electrode housing including a ring electrode for stimulating cardiac tissue; a helical fixation screw disposed within the electrode housing along an axis extending generally perpendicular to the longitudinal axis of the lead body and mounted for movement between an axially retracted position and an axially extended position for affixing the electrode housing to the cardiac tissue, wherein the helical fixation screw depends from an externally threaded plug supported within an internally threaded collar disposed within the electrode housing; an insulating tube positioned radially outside of the helical fixation screw in the electrode housing for eluting at least one drug; and
a screwdriver tipped stylet extended into the electrode housing and configured for engagement with the externally threaded plug. - View Dependent Claims (24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35)
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36. A cardiac lead implantation kit, comprising:
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a bipolar cardiac lead including; an elongated lead body having opposed proximal and distal end portions, and defining a longitudinal axis; an electrode housing operatively associated with the distal end portion of the lead body for stimulating cardiac tissue; a helical fixation screw disposed within the electrode housing along an axis extending generally perpendicular to the longitudinal axis of the lead body and mounted for movement between an axially retracted position and an axially extended position for affixing the electrode housing to the cardiac tissue; and an insulating tube positioned radially outside of this helical fixation screw in the electrode housing for eluting at least one drug; a screwdriver tipped stylet for facilitating movement of the helical fixation screw; and a flexible guide sheath for directing the tip of the stylet to the electrode housing. - View Dependent Claims (37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47)
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Specification