Implantable Lead Affixation Structure for Nerve Stimulation to Alleviate Bladder Dysfunction and Other Indication

摘要

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.

主权项

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 lead of the plurality; 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, 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.