Fixation device for coronary venous lead
First Claim
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1. A cardiac lead system adapted for anchoring in a vessel, the system comprising:
- a lead body including at least one electrode and having a proximal end and a distal end, the lead body defining at least one lead lumen extending between the proximal and distal ends and a plurality of stops located on an outer surface of the lead body; and
an expandable fixation mechanism having an expanded position adapted to engage an inner surface of the vessel and including a structure slidable over an outer surface of the lead body between the plurality of stops, such that the lead body is adapted to move longitudinally relative to the fixation mechanism when the fixation mechanism is in the expanded position; and
wherein the plurality of stops are adapted to contact the structure to resist the longitudinal movement of the lead body relative to the fixation mechanism when the fixation mechanism is in the expanded position.
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Abstract
In one embodiment, the present invention provides a cardiac lead device including a fixation mechanism slidably attached to the lead such that when the fixation mechanism is expanded into contact with a body lumen, the lead may be moved relative to the fixation mechanism if desired. Such lead movement may be limited by complimentary structure on the lead body and the fixation mechanism that prevents the lead from moving unless sufficient force is applied to the lead.
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Citations
17 Claims
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1. A cardiac lead system adapted for anchoring in a vessel, the system comprising:
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a lead body including at least one electrode and having a proximal end and a distal end, the lead body defining at least one lead lumen extending between the proximal and distal ends and a plurality of stops located on an outer surface of the lead body; and an expandable fixation mechanism having an expanded position adapted to engage an inner surface of the vessel and including a structure slidable over an outer surface of the lead body between the plurality of stops, such that the lead body is adapted to move longitudinally relative to the fixation mechanism when the fixation mechanism is in the expanded position; and wherein the plurality of stops are adapted to contact the structure to resist the longitudinal movement of the lead body relative to the fixation mechanism when the fixation mechanism is in the expanded position. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A cardiac lead device comprising:
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a lead body having a proximal end and a distal end, the lead body defining at least one lead lumen extending between the proximal and distal ends; and an expandable fixation mechanism slidable on an outer surface of the lead body when the fixation member is in an expanded position such that the lead body can move relative to the fixation member when the fixation member engages an inner surface of a vessed; means for compressing the fixation mechanism from the expanded position such that the fixation mechanism is selectively deployable within a body lumen; and means for resisting the movement of the lead body relative to the fixation mechanism at a plurality of predetermined positions when the fixation mechanism is in the expanded position. - View Dependent Claims (12, 13, 14, 15)
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16. A cardiac lead system adapted for anchoring in a vessel, the system comprising:
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a lead body including at least one electrode and having a proximal end and a distal end, the lead body defining at least one lead lumen extending between the proximal and distal ends; an expandable fixation mechanism having an expanded position adapted to engage an inner surface of the vessel, the expandable fixation mechanism being slideable on an outer surface of the lead body; a first structure located on the lead body, wherein the first structure includes at least one curve, bend, coil, or ridge on the lead body; a second structure located on the fixation mechanism, wherein the first structure and the second structure are adapted to contact each other to resist longitudinal movement of the lead body relative to the fixation mechanism; and a stylet, wherein a diameter of the first structure is adapted to be substantially reduced upon inserting the stylet through the lead lumen. - View Dependent Claims (17)
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Specification