Percutaneous lead with distal fixation
First Claim
1. A lead comprising:
- an elongated body having a distal end, a proximal end, and a hollow interior extending longitudinally therein;
a plurality of electrodes on a distal portion of the elongated body adjacent the distal end, the plurality of electrodes being spaced from the distal end of the elongated body and from each other by electrically nonconductive segments, wherein the elongated body includes an anchor segment disposed between the distal end and a first electrode of the plurality of electrodes which is closest to the distal end, the anchor segment having a plurality of lobes which are separated from each other by slits and which are movable between a collapsed position and an expanded position, the first electrode being spaced from the distal end by a maximum distance in the collapsed position, the first electrode being spaced from the distal end by a reduced distance smaller than the maximum distance in the expanded position in which the lobes expand outwardly relative to a longitudinal axis of the elongated body;
a positioning mechanism disposed inside the hollow interior of the elongated body and at least partially within the anchor segment, the positioning mechanism having a distal positioning portion attached to the distal end of the elongated body and a proximal positioning portion which is movable relative to the distal positioning portion; and
a control member connected with the proximal positioning portion of the positioning mechanism and to move the proximal positioning portion relative to the distal positioning portion so as to control the positioning mechanism to pull the distal end in a proximal direction toward the proximal end so as to move the lobes of the anchor segment from the collapsed position to the expanded position and to push the distal end in a distal direction away from the proximal end so as to move the lobes of the anchor segment from the expanded position to the collapsed position.
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Accused Products
Abstract
A lead includes an elongated body and an anchor segment disposed between the distal end of the body and electrodes on a distal portion of the body. The anchor segment has lobes which are separated by slits and movable between a collapsed position and an expanded position. A positioning mechanism is disposed inside the hollow interior of the body and at least partially within the anchor segment. The positioning mechanism has a distal positioning portion attached to the distal end of the body and a proximal positioning portion. A control member is connected with the proximal positioning portion to control the positioning mechanism to pull the distal end toward the proximal end so as to move the lobes from the collapsed position to the expanded position and to push the distal end away from the proximal end so as to move the lobes from the expanded to the collapsed position.
10 Citations
20 Claims
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1. A lead comprising:
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an elongated body having a distal end, a proximal end, and a hollow interior extending longitudinally therein; a plurality of electrodes on a distal portion of the elongated body adjacent the distal end, the plurality of electrodes being spaced from the distal end of the elongated body and from each other by electrically nonconductive segments, wherein the elongated body includes an anchor segment disposed between the distal end and a first electrode of the plurality of electrodes which is closest to the distal end, the anchor segment having a plurality of lobes which are separated from each other by slits and which are movable between a collapsed position and an expanded position, the first electrode being spaced from the distal end by a maximum distance in the collapsed position, the first electrode being spaced from the distal end by a reduced distance smaller than the maximum distance in the expanded position in which the lobes expand outwardly relative to a longitudinal axis of the elongated body; a positioning mechanism disposed inside the hollow interior of the elongated body and at least partially within the anchor segment, the positioning mechanism having a distal positioning portion attached to the distal end of the elongated body and a proximal positioning portion which is movable relative to the distal positioning portion; and a control member connected with the proximal positioning portion of the positioning mechanism and to move the proximal positioning portion relative to the distal positioning portion so as to control the positioning mechanism to pull the distal end in a proximal direction toward the proximal end so as to move the lobes of the anchor segment from the collapsed position to the expanded position and to push the distal end in a distal direction away from the proximal end so as to move the lobes of the anchor segment from the expanded position to the collapsed position. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A lead comprising:
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an elongated body having a distal end, a proximal end, and a hollow interior extending longitudinally therein; a plurality of electrodes on a distal portion of the elongated body adjacent the distal end, the plurality of electrodes being spaced from the distal end of the elongated body and from each other by electrically nonconductive segments; and an internal lumen tubing disposed inside the hollow interior of the elongated body and being attached to the distal end; wherein the elongated body includes an anchor segment disposed between the distal end and a first electrode of the plurality of electrodes which is closest to the distal end, the anchor segment having a plurality of lobes which are separated from each other by slits and which are movable between a collapsed position and an expanded position, the first electrode being spaced from the distal end by a maximum distance in the collapsed position, the first electrode being spaced from the distal end by a reduced distance smaller than the maximum distance in the expanded position in which the lobes expand outwardly relative to a longitudinal axis of the elongated body; wherein the internal lumen tubing is movable relative to the elongated body to pull the distal end in a proximal direction toward the proximal end so as to move the lobes of the anchor segment from the collapsed position to the expanded position and to push the distal end in a distal direction away from the proximal end so as to move the lobes of the anchor segment from the expanded position to the collapsed position; and wherein the anchor segment has a diameter D in the collapsed position and has at least five lobes, each lobe has a width W, and W is smaller than about π
D/10. - View Dependent Claims (10, 11, 12, 13, 14)
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15. A lead comprising:
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an elongated body having a distal end, a proximal end, and a hollow interior extending longitudinally therein; a plurality of electrodes on a distal portion of the elongated body adjacent the distal end, the plurality of electrodes being spaced from the distal end of the elongated body and from each other by electrically nonconductive segments, wherein the elongated body includes an anchor segment disposed between the distal end and a first electrode of the plurality of electrodes which is closest to the distal end, the anchor segment having a plurality of lobes which are separated from each other by slits and which are movable between a collapsed position and an expanded position, the first electrode being spaced from the distal end by a maximum distance in the collapsed position, the first electrode being spaced from the distal end by a reduced distance smaller than the maximum distance in the expanded position in which the lobes expand outwardly relative to a longitudinal axis of the elongated body; a positioning mechanism disposed inside the hollow interior of the elongated body and at least partially within the anchor segment, the positioning mechanism having a first mating member attached to the distal end of the elongated body and a second mating member attached to the elongated body at a position proximal of the anchor segment, the first mating member and the second mating member being in frictional coupling with one another, wherein the frictional coupling is adjustable to move the second mating member relative to the first mating member; and a control member connected with the second mating member to move the second mating member relative to the first mating member to pull the distal end in a proximal direction toward the proximal end so as to move the lobes of the anchor segment from the collapsed position to the expanded position and to push the distal end in a distal direction away from the proximal end so as to move the lobes of the anchor segment from the expanded position to the collapsed position. - View Dependent Claims (16, 17, 18, 19, 20)
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Specification