Apparatus for removing an elongated structure implanted in biological tissue
First Claim
1. A lead removal apparatus for removing an implanted, lead from a patient, the lead including a coiled structure having a passageway extending longitudinally therein, comprising:
- a stylet having a distal end;
an expandable portion comprising a plurality of expandable members and having a first diameter sized for insertion into the passageway of the coiled structure, wherein the expandable portion is disposed over the stylet and attached about the distal portion of the stylet;
an actuator portion disposed proximal the expandable portion, wherein the expandable portion is longitudinally moveable and laterally expandable to a second diameter when the actuator portion is urged against the expandable portion, thereby resulting in one or more of the plurality of expandable members expanding laterally to engage the coiled structure when situated in the passageway thereof; and
wherein the expandable portion is adapted such that the second diameter is sufficiently large for the lead removal apparatus to engage with a plurality of different sizes of the lead in which the diameter of the coiled structure passageway ranges from approximately 0.4 mm to 0.9 mm.
2 Assignments
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Accused Products
Abstract
Disclosed is a heart lead removal apparatus for removing an range of different sized implanted cardiac pacemaker or defibrillator leads from the heart, typically through a blood vessel leading to the heart. The lead removal apparatus comprises a stylet, an expandable portion, and an actuator portion which is manually advanced by the operator to cause the expandable portion to engage the coils within a pacemaker coil lumen. In one preferred embodiment, the expandable portion comprises a multifilar wire bundle that is helically wound around the stylet and attached about the tip thereof. The actuator portion, which comprises an elongate metal cannula attached to a first handle, is urged forward to contact the proximal end of the expandable portion, thereby causing the individual wires of the multifilar wire bundle to deform outward in a random fashion.
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Citations
17 Claims
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1. A lead removal apparatus for removing an implanted, lead from a patient, the lead including a coiled structure having a passageway extending longitudinally therein, comprising:
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a stylet having a distal end;
an expandable portion comprising a plurality of expandable members and having a first diameter sized for insertion into the passageway of the coiled structure, wherein the expandable portion is disposed over the stylet and attached about the distal portion of the stylet;
an actuator portion disposed proximal the expandable portion, wherein the expandable portion is longitudinally moveable and laterally expandable to a second diameter when the actuator portion is urged against the expandable portion, thereby resulting in one or more of the plurality of expandable members expanding laterally to engage the coiled structure when situated in the passageway thereof; and
wherein the expandable portion is adapted such that the second diameter is sufficiently large for the lead removal apparatus to engage with a plurality of different sizes of the lead in which the diameter of the coiled structure passageway ranges from approximately 0.4 mm to 0.9 mm. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A lead removal apparatus for removing an implanted, cardiac lead from a patient the lead including a coiled structure having a passageway extending longitudinally therein, comprising:
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a stylet having a distal end;
an expandable portion comprising a multifilar wire bundle that includes a series of helical windings around the stylet, the expandable portion being attached about the distal end of the stylet, wherein the helical windings of the multifilar wire bundle of at least an intermediate section of the expandable portion include a series of gaps therebetween, the individual wires of the multifilar bundle being closely spaced together; and
an actuator portion disposed proximal the expandable portion, wherein the expandable portion is longitudinally moveable and laterally expandable to a second diameter when the actuator portion is urged against the expandable portion, thereby resulting in one or more of the plurality of expandable members plastically deforming to engage the coiled structure when situated in the passageway thereof. - View Dependent Claims (14, 15, 16)
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17. A lead removal apparatus for removing an implanted, cardiac lead from a patient, the lead including a coiled structure having a passageway extending longitudinally therein, comprising:
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a stylet having a distal end;
an expandable portion comprising a plurality of expandable members comprising a multifilar wire bundle comprising annealed stainless steel wires, the mulitfilar wire bundle including a series of helical windings around the stylet, the expandable portion being attached to the stylet, the stylet and expandable portion being sized for insertion into the passageway;
an actuator portion disposed proximal the expandable portion, wherein the expandable portion is longitudinally moveable and laterally expandable to a second diameter when the actuator portion is urged against the expandable portion, thereby resulting in one or more of the plurality of expandable members expanding laterally to engage the coiled structure when situated in the passageway thereof; and
wherein the expandable portion is adapted such that the second diameter is sufficiently large for the lead removal apparatus to engage a plurality of different sizes of the lead in which the diameter of the coiled structure passageway is approximately 0.4 mm to 0.9 mm.
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Specification