Implantable lead affixation structure for nerve stimulation to alleviate bladder dysfunction and other indication
First Claim
1. A neurostimulation lead comprising:
- an implantable lead having a plurality of conductors disposed within a lead body, the plurality of conductors extending from a proximal end of the lead to a plurality of neurostimulation electrodes disposed at or near a distal end of the lead, each conductor of the plurality corresponding to a respective neurostimulation electrode of the plurality of neurostimulation electrodes; and
a single anchor coupled with the lead body and configured for anchoring the implanted lead within a body of a patient, wherein the lead includes only the single anchor, the anchor comprising;
a helical body extending helically on the outside of the lead body along a longitudinal axis and disposed along a recessed portion of the lead body, anda plurality of tines extending from the helical body, wherein each of the plurality of tines is biased toward a deployed configuration, wherein in the deployed configuration, the plurality of tines extend laterally away from the longitudinal axis, and the plurality of tines are resiliently deflectable toward a delivery configuration in which the plurality of tines are folded inward toward the longitudinal axis to facilitate delivery of the neurostimulation lead during implantation,wherein the recessed portion, the helical body and the plurality of tines are dimensioned to facilitate fine-tuned placement of the lead in delivery and deployment.
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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.
289 Citations
25 Claims
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1. A neurostimulation lead comprising:
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an implantable lead having a plurality of conductors disposed within a lead body, the plurality of conductors extending from a proximal end of the lead to a plurality of neurostimulation electrodes disposed at or near a distal end of the lead, each conductor of the plurality corresponding to a respective neurostimulation electrode of the plurality of neurostimulation electrodes; and a single anchor coupled with the lead body and configured for anchoring the implanted lead within a body of a patient, wherein the lead includes only the single anchor, the anchor comprising; a helical body extending helically on the outside of the lead body along a longitudinal axis and disposed along a recessed portion of the lead body, and a plurality of tines extending from the helical body, wherein each of the plurality of tines is biased toward a deployed configuration, wherein in the deployed configuration, the plurality of tines extend laterally away from the longitudinal axis, and the plurality of tines are resiliently deflectable toward a delivery configuration in which the plurality of tines are folded inward toward the longitudinal axis to facilitate delivery of the neurostimulation lead during implantation, wherein the recessed portion, the helical body and the plurality of tines are dimensioned to facilitate fine-tuned placement of the lead in delivery and deployment. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 23)
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19. A neurostimulation lead comprising:
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an implantable lead having a lead body and one or more neurostimulation electrodes disposed at or near a distal end of the lead; and a single anchor coupled to the lead body, wherein the anchor is formed as a single integral component and configured for anchoring the implanted lead within a body of a patient, the anchor comprising; a spiral body wrapped on a portion of the lead body along a longitudinal axis thereof and disposed entirely within a recessed portion of the lead body, and a plurality of tines extending from the spiral body, wherein each of the plurality of tines extends laterally outward and is resiliently deflectable to allow for a reduced profile delivery configuration when constrained by a sheath to facilitate delivery of the neurostimulation lead during implantation, wherein the recessed portion, the spiral body and the plurality of tines are dimensioned to facilitate fine-tuned placement of the lead in delivery and deployment. - View Dependent Claims (22, 24)
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20. A neurostimulation lead comprising:
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an implantable lead having a lead body and at least four neurostimulation electrodes disposed at or near a distal end of the lead; and an anchor coupled with the lead body and configured for anchoring the lead within a body of a patient to maintain the at least four neurostimulation electrodes at or near a target tissue location, the anchor comprising; a helical body attached to the lead body along a recessed portion thereof and extending helically along a longitudinal axis thereof, and a plurality of tines extending from the helical body, wherein each of the plurality of tines extends laterally away from longitudinal axis of the helical body, when in a deployed configuration, so as to facilitate anchoring of the lead, and wherein each of the plurality of tines is deflectable inward towards the lead body in a constrained configuration to allow a reduced delivery profile to facilitate implantation of the lead wherein the anchor is dimensioned so that an outer surface of the helical body is substantially flush with an outer surface of the lead body outside of the recessed portion so as to improve ease and accuracy in delivery and positioning during deployment to facilitate fine-tuned lead placement. - View Dependent Claims (21, 25)
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Specification