Apparatus for removing an elongated structure implanted in biological tissue
First Claim
1. Apparatus for removing a pacemaker lead implanted in a heart, comprising:
- stylet means for inserting into a longitudinal passageway of said implanted lead;
first coil means attached about a distal end of said stylet means for radially expanding about said stylet means and securing said stylet means to said lead when said stylet means is inserted in said passageway; and
second coil means extending proximally from said first coil means and laterally from said stylet means for engaging with said lead and radially expanding said first coil means about said stylet means.
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Accused Products
Abstract
Heart lead removal apparatus and method are disclosed for removing a heart lead from the wall of a heart through a blood vessel leading to the heart. The apparatus comprises a flexible stylet wire with an expandable wire coil attached to the distal end for engaging the coiled structure of the heart lead. The wire coil includes first, second, and third pluralities of turns. The first plurality of turns is positioned around and about the distal end of the stylet wire for radially expanding when in the passageway of the lead to secure the stylet wire to the lead. The second plurality of turns extends proximally from the first plurality of turns and laterally from the stylet wire for engaging the lead and radially expanding the first plurality of turns. The third plurality of turns extends distally from the first plurality of turns and is attached around and about the distal end of the stylet wire for cooperating in the radial expansion of the first plurality of turns when in the passageway of the lead. An enhancement to the lead removal apparatus includes a flat portion in the stylet wire between first and third pluralities of turns. The width of the flat portion approximates that of the passageway of the lead to further secure and lock the first plurality of turns to the pacemaker lead.
155 Citations
20 Claims
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1. Apparatus for removing a pacemaker lead implanted in a heart, comprising:
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stylet means for inserting into a longitudinal passageway of said implanted lead; first coil means attached about a distal end of said stylet means for radially expanding about said stylet means and securing said stylet means to said lead when said stylet means is inserted in said passageway; and second coil means extending proximally from said first coil means and laterally from said stylet means for engaging with said lead and radially expanding said first coil means about said stylet means. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. Apparatus for removing a pacemaker lead implanted in a heart, comprising:
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stylet wire means for inserting into a longitudinal passageway of said lead; and wire coil means attached to said stylet wire means and radially expandable when in said longitudinal passageway of said lead for engaging said lead and securing said stylet wire means to said lead, said coil means having a first plurality of turns positioned around and about a distal end of said stylet wire means and a second plurality of turns extending proximally from said first plurality of turns and laterally from said stylet wire means. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17)
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18. Apparatus for removing a pacemaker lead implanted in a heart, comprising:
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a stylet wire insertable into a longitudinal passageway of said pacemaker lead; a wire coil having a first, a second, and a third plurality of turns, said first plurality of turns positioned around and about a distal end of said stylet wire and having a first predetermined spacing therebetween, said second plurality of turns extending proximally from said first plurality of turns and laterally from said stylet wire and cooperatively having with said stylet wire a cross-sectional dimension approximating that of said longitudinal passageway, said second plurality of turns also having a predetermined length and a maximum width therealong, said third plurality of turns extending distally from said first plurality of turns and attached around and about said distal end of said stylet wire, said first plurality of turns being radially expandable when in said passageway of said lead to secure said stylet wire to said lead, said second plurality of turns when in said passageway of said lead engaging said lead to radially expand said first plurality of turns; tin-silver solder attaching said third plurality of turns around and about said distal end of said stylet wire; and a silver solder bead attached about said distal end of said stylet wire. - View Dependent Claims (19, 20)
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Specification