Asymmetric Electrode Implantable Lead Anchoring
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Solution Overview
Problem
Existing implantable pulse generator leads lack reliable anchoring mechanisms, leading to inconsistent stimulation of targeted anatomical structures and potential unintended stimulation of non-targeted tissues.
Innovation Solution
The design of an implantable lead with a paddle body featuring asymmetric electrodes and conductors that are offset from the center, allowing for secure embedding within anatomical structures using polymeric materials and sutures, ensuring precise delivery of electrical stimulation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional symmetric electrode configurations are used, then manufacturing is simpler, but anchoring reliability is insufficient
Solution Approach 1:
The patent applies asymmetry by offsetting the stem portions of electrodes from the central longitudinal axis of the paddle body. This asymmetric configuration allows the lead to anchor more reliably in anatomical structures by creating an uneven distribution of electrodes that better conforms to tissue geometry, while the conductors remain straight without bending, thus resolving the contradiction between improved anchoring and device complexity.
2Manufacturing precision
If conductors are bent to accommodate asymmetric electrodes, then electrode positioning is improved, but conductor integrity is compromised
Solution Approach 1:
The asymmetric positioning of stem portions relative to the central axis allows precise electrode placement without requiring conductor bending. The conductors extend straight from the proximal to distal end of the lead body, maintaining their structural integrity while the asymmetric electrode configuration achieves the desired positioning precision.
3Measurement precision
If electrodes are centrally aligned, then structural symmetry is maintained, but stimulation precision is reduced
Solution Approach 1:
The patent deliberately breaks symmetry by offsetting stem portions from the central axis, creating an asymmetric electrode configuration that enhances stimulation precision. This asymmetric arrangement allows for more accurate targeting of specific anatomical structures while the paddle body maintains its overall symmetric shape for manufacturing purposes.
Data Source
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AI summary
Various embodiments concern an implantable lead. The lead can comprise a lead body. At least two conductors can extend within the lead body, such as in respective lumens of the lead body. The lead can comprise at least two electrodes. Each electrode can be connected to a respective one of the at least two conductors. A paddle body can be connected to the lead body. The paddle body can comprise a longitudinal axis that divides the paddle body into left and right sides. The at least two electrodes can be partially embedded within the paddle body. The at least two electrodes can be arrayed along the longitudinal axis. Each electrode can be asymmetric about the longitudinal axis.