Cardiac lead with retractible fixators
First Claim
Patent Images
1. An implantable lead comprising:
- an electrical conductor having a first end adapted to be connected to a cardiac arrhythmia management device and a second end, a sheath of insulative material covering said conductor, and an electrode and fixation assembly connected to the second end of the conductor and the sheath, said electrode and fixation assembly including a body having a chamber, said body being an electrical conductor member connected to the electrical conductor, said body having a distal end including and outer surface for directly containing the endocardium of the heart, a jacket of electrical insulation material covering the body except for said outer surface, carrier means located within the chamber for movement between first and second positions;
at least one fixation means moveable from a first position within the assembly to a second position extended away from the assembly for engagement with the endocardium of the human heart, means mounting said fixation means on the carrier means whereby the fixation means moves with the carrier means, said body and jacket having hole means open to the chamber accommodating the fixation means to allow the fixation means to be moved from the chamber outwardly of the body into the endocardium of the heart and moved inwardly into the body out of engagement with the endocardium of the heart, said carrier means cooperating with means operable to selectively move the carrier means to the first and second positions to extend and retract the fixation means relative to the body.
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Accused Products
Abstract
A cardiac lead has an electrode and fixation assembly including a plurality of fixation members movable to extended positions into heart tissue to retain the electrode in intimate engagement with heart tissue. An elongated stylet is used to move the fixation members to their extended positions into the heart tissue and retract the fixation members into the fixation assembly to allow the lead to be removed from the heart and body of a person.
170 Citations
37 Claims
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1. An implantable lead comprising:
- an electrical conductor having a first end adapted to be connected to a cardiac arrhythmia management device and a second end, a sheath of insulative material covering said conductor, and an electrode and fixation assembly connected to the second end of the conductor and the sheath, said electrode and fixation assembly including a body having a chamber, said body being an electrical conductor member connected to the electrical conductor, said body having a distal end including and outer surface for directly containing the endocardium of the heart, a jacket of electrical insulation material covering the body except for said outer surface, carrier means located within the chamber for movement between first and second positions;
at least one fixation means moveable from a first position within the assembly to a second position extended away from the assembly for engagement with the endocardium of the human heart, means mounting said fixation means on the carrier means whereby the fixation means moves with the carrier means, said body and jacket having hole means open to the chamber accommodating the fixation means to allow the fixation means to be moved from the chamber outwardly of the body into the endocardium of the heart and moved inwardly into the body out of engagement with the endocardium of the heart, said carrier means cooperating with means operable to selectively move the carrier means to the first and second positions to extend and retract the fixation means relative to the body. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
- an electrical conductor having a first end adapted to be connected to a cardiac arrhythmia management device and a second end, a sheath of insulative material covering said conductor, and an electrode and fixation assembly connected to the second end of the conductor and the sheath, said electrode and fixation assembly including a body having a chamber, said body being an electrical conductor member connected to the electrical conductor, said body having a distal end including and outer surface for directly containing the endocardium of the heart, a jacket of electrical insulation material covering the body except for said outer surface, carrier means located within the chamber for movement between first and second positions;
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18. An implantable lead comprising:
- an electrical conductor having a first end adapted to be connected to a cardiac arrhythmia management device and a second end, a sheath of insulative material covering said conductor, and an electrode and fixation assembly connected to the second end of the conductor and the sheath, said electrode and fixation assembly including an electrical conductive body means connected to the electrical conductor having an outer surface for directly contacting the endocardium of the heart, fixation means mounted on the body means for movement from a retracted position within the body means to an extended position away from the body means to retain the outer surface of the body means in contact with the endocardium of the heart, said body means having an internal chamber, and hole means in said body means open to the chamber to accommodate the fixation means, a member located within said chamber moveable between first and second positions, said fixation means being located within said chamber and having elongated portions located in said hole means, means mounting the fixation means on the member for movement with the member into said retracted position in the chamber and said extended position away form said body means into engagement with the endocardium of the heart, said means mounting the fixation means on the member comprises a sleeve located around the member, said member cooperating with the means operable to move the member between said first and second positions thereby selectively moving the fixation means to its extended position and retracted position.
- View Dependent Claims (19, 20, 21, 22, 25, 26, 27, 28, 29, 30)
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23. The lead of claim 23 wherein:
- the outer surface of the body means is an annular surface.
- View Dependent Claims (24)
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31. An implantable lead comprising:
- an electrical conductor having a first end adapted to be connected to a cardiac arrhythmia management device and a second end, a sheath of insulative material covering said conductor, and an electrode and fixation assembly connected to the second end of the conductor and the sheath, said electrode and fixation assembly including an electrical conductive body means connected to the electrical conductor having an outer surface for directly contacting the endocardium of the heart, fixation means mounted on the body means for movement from a retracted position in the body means and to an extended position away from the body means to retain the outer surface of the body means in contact with the endocardium of the heart, said body means having a cylindrical side wall surrounding an internal chamber, electrical insulation means surrounding the side wall, hole means in the side wall and electrical insulation means open to the chamber to accommodate the fixation means, a member located within said chamber moveable between first and second positions, said fixation means being located within said chamber and having elongated portions located in said hole means, means mounting the fixation means on the member for movement with the member into retracted position in the chamber and an extended position laterally away form said side wall of the body means into engagement with the endocardium of the heart, said member cooperating with means operable to move the member between said first and second position thereby moving the fixation means to its extended position and retracted position.
- View Dependent Claims (32, 33, 34, 35, 36, 37)
Specification