Implantable lead affixation structure for nerve stimulation to alleviate bladder dysfunction and other indication
First Claim
1. A method of anchoring an implanted neurostimulation lead of a neurostimulation system in a patient, the method comprising:
- providing a neurostimulation lead having one or more neurostimulation electrodes and an anchor proximal the one or more electrodes, wherein the anchor includes a helical body wrapped along a length of the lead and a plurality of tines attached to the helical body folded inward against a lead body and constrained by a sheath, wherein the helical body attaches to the lead body in a recessed portion thereof so as to allow for a reduced delivery profile;
advancing the lead through a tissue of a patient to a target location while the plurality of tines are folded inward against the lead body constrained by the sheath;
resiliently deploying the plurality of tines to a deployed configuration extended laterally outward from the helical body by withdrawing the sheath; and
anchoring the neurostimulation lead at the target location by engaging the plurality of tines in the deployed configuration against adjacent tissues thereby inhibiting axial movement of the implanted lead.
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Accused Products
Abstract
Anchoring devices and methods for affixing an implanted lead of a neurostimulation system at a target location in a patient are provided herein. Such anchoring devices includes a helical body having a plurality of tines extending laterally outward from the lead when deployed that engage tissue to inhibit axial movement of the implanted lead. The plurality of tines are biased towards the laterally extended deployed configuration and fold inward towards the lead to a delivery configuration to facilitate delivery of the lead through a sheath. The tines may be angled in a proximal direction or in both proximal and distal directions and may include various features to assist in visualization and delivery of the lead. The anchor may be formed according to various methods, including laser cutting of a tubular section along with heat or reflow to set the material with the anchor in the deployed configuration and injection molding.
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Citations
19 Claims
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1. A method of anchoring an implanted neurostimulation lead of a neurostimulation system in a patient, the method comprising:
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providing a neurostimulation lead having one or more neurostimulation electrodes and an anchor proximal the one or more electrodes, wherein the anchor includes a helical body wrapped along a length of the lead and a plurality of tines attached to the helical body folded inward against a lead body and constrained by a sheath, wherein the helical body attaches to the lead body in a recessed portion thereof so as to allow for a reduced delivery profile; advancing the lead through a tissue of a patient to a target location while the plurality of tines are folded inward against the lead body constrained by the sheath; resiliently deploying the plurality of tines to a deployed configuration extended laterally outward from the helical body by withdrawing the sheath; and anchoring the neurostimulation lead at the target location by engaging the plurality of tines in the deployed configuration against adjacent tissues thereby inhibiting axial movement of the implanted lead. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A method of anchoring an implanted neurostimulation lead of a neurostimulation system in a patient, the method comprising:
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providing a neurostimulation lead having one or more neurostimulation electrodes and a plurality of tines extending outwardly from a leady body of the lead; advancing the lead through a tissue of a patient to a target location while the plurality of tines are folded inward toward the lead body constrained by a sheath; resiliently deploying the plurality of tines to a deployed configuration extended laterally outward from the lead body by withdrawing the sheath; coupling neurostimulation lead to a pulse generator; and anchoring the neurostimulation lead at the target location by engaging the plurality of tines in the deployed configuration against adjacent tissues thereby inhibiting axial movement of the implanted lead and relieving strain within a proximal portion of the lead proximal of the one or more neurostimulation electrodes with a strain relief member comprising a helical element wrapped along the proximal portion of the lead adjacent a junction of the neurostimulation lead and the pulse generator. - View Dependent Claims (14)
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15. A method of anchoring an implanted neurostimulation lead of a neurostimulation system in a patient, the method comprising:
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providing a neurostimulation lead having one or more neurostimulation electrodes and an anchor proximal the one or more electrodes, wherein the anchor includes a helical body wrapped along a length of the lead and a plurality of tines attached to the helical body; advancing the lead through a tissue of a patient to a target location while the plurality of tines are folded inward toward the lead body; resiliently deploying the plurality of tines to a deployed configuration extended laterally outward from the helical body by twisting the lead body in one direction, the plurality of tines being configured to fold inward along a helical or inclined axis; and anchoring the neurostimulation lead at the target location by engaging the plurality of tines in the deployed configuration against adjacent tissues thereby inhibiting axial movement of the implanted lead. - View Dependent Claims (16, 17, 18)
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19. A method of anchoring an implanted neurostimulation lead of a neurostimulation system in a patient, the method comprising:
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providing a neurostimulation lead having one or more neurostimulation electrodes and an anchor proximal the one or more electrodes, wherein the anchor includes a helical body wrapped along a length of the lead and a plurality of tines attached to the helical body; advancing the lead through a tissue of a patient to a target location while the plurality of tines are folded inward toward the lead body; resiliently deploying the plurality of tines to a deployed configuration extended laterally outward from the helical body; and removing the lead after deployment of the anchor by retracting the plurality of tines from a deployed configuration by twisting the lead body in one direction, the plurality of tines being configured to fold inward along a helical or inclined axis.
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Specification