Expandable member for venous lead fixation
First Claim
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1. A cardiac lead comprising:
- a lead body having an outer surface and including a proximal end adapted to be connected to a pulse generator, a distal end, and a lumen adapted to receive a guiding member extending between the proximal end and the distal end;
at least one conductor extending within the lead body from the proximal end to the distal end;
at least one electrode located on the lead body operatively coupled to the at least one conductor;
a preformed, self-expanding helical fixation member positioned externally over a distal portion of the lead body adjacent to the at least one electrode, the fixation member including a distal end fixed to the outer surface of the lead body and an unattached, free proximal end slideably adjacent to the outer surface lead body such that the unattached free proximal end is adapted to slide along the outer surface of the lead body when the fixation member is transitioned from a collapsed configuration to an expanded configuration, wherein the fixation member is preformed such that in the expanded configuration the fixation member is biased to a side of the lead body.
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Abstract
The present invention is directed to a cardiac lead for delivery to the left side of a patient'"'"'s heart including a self-expanding fixation method positioned over the distal portion of the lead. The self-expanding fixation member is capable of automatically expanding from a collapsed state to an expanded state upon deployment at a target site in a cardiac vessel. The fixation member is configured such that in the expanded state it is biased to a side of the lead body.
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Citations
19 Claims
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1. A cardiac lead comprising:
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a lead body having an outer surface and including a proximal end adapted to be connected to a pulse generator, a distal end, and a lumen adapted to receive a guiding member extending between the proximal end and the distal end; at least one conductor extending within the lead body from the proximal end to the distal end; at least one electrode located on the lead body operatively coupled to the at least one conductor; a preformed, self-expanding helical fixation member positioned externally over a distal portion of the lead body adjacent to the at least one electrode, the fixation member including a distal end fixed to the outer surface of the lead body and an unattached, free proximal end slideably adjacent to the outer surface lead body such that the unattached free proximal end is adapted to slide along the outer surface of the lead body when the fixation member is transitioned from a collapsed configuration to an expanded configuration, wherein the fixation member is preformed such that in the expanded configuration the fixation member is biased to a side of the lead body. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A cardiac rhythm management system for delivering therapy to a heart, the system comprising:
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a lead body having an outer surface including a proximal end adapted to be connected to a pulse generator, a distal end, and a lumen extending there between, the lead body being configured to allow passage of a guiding member through the lead lumen; at least one conductor extending within the lead body from the proximal end to the distal end; at least one electrode located on a distal portion of the lead body and operatively coupled to the at least one conductor; a pulse generator electrically coupled to the at least one conductor at the proximal end of the lead body; a pre-formed, self-expanding helical fixation member positioned externally over the distal portion of the lead body adjacent to the at least one electrode, the fixation member including a distal end fixed to the distal end of the lead body and an unattached, free proximal end slideably adjacent to the lead body such that the unattached, free proximal end is adapted to slide along the outer surface of the lead body when the fixation member is transitioned from a collapsed configuration to an expanded configuration, the fixation member being preformed such that in an expanded configuration the fixation member is biased to a side of the lead body; and a delivery sheath adapted to be retracted in a proximal direction to deploy the self-expanding fixation member at a target site in a coronary vessel. - View Dependent Claims (9, 10, 11, 12, 13)
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14. A lead for placement in a coronary vessel of a human heart, the lead comprising:
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a lead body having an outer surface and including a proximal end adapted to be coupled to a pulse generator, a distal end, and a lumen extending there between; at least one conductor extending within the lead body from the proximal end to the distal end; at least one electrode located on the lead body and operatively coupled to the at least one conductor; and a fixation means for securing the distal end of the lead body in the coronary vessel disposed externally over the outer surface of the lead body, the fixation means having a distal end fixed to the distal end of the lead body and an unattached, free proximal end slideably adjacent to the lead body such that the unattached, free proximal end is adapted to slide along the outer surface of the lead body when the fixation means is transitioned from a collapsed configuration to an expanded configuration. - View Dependent Claims (15, 16, 17, 18, 19)
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Specification