Segmented Electrode Array with Rail System for Radial Selectivity
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Solution Overview
Problem
Deep brain stimulation technologies face challenges in achieving radial selectivity of current, leading to unwanted stimulation of neighboring neural tissue and prolonged therapeutic effects due to the radial symmetry of traditional ring electrodes.
Innovation Solution
The use of a lead with a longitudinal rail and segmented electrodes, where the rail includes prongs to receive and position the electrodes, allowing for radial current steering and more precise targeting of neural tissue by varying the configuration and orientation of the electrodes along the lead.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If traditional ring electrodes are used for deep brain stimulation, then the device structure is simple, but radial selectivity of current is minimal leading to unwanted stimulation of neighboring neural tissue
Solution Approach 1:
The electrode array is divided into multiple radially segmented electrodes arranged around the lead shaft, with each electrode capable of independent current delivery. This segmentation allows selective stimulation of specific radial zones in the brain target, improving radial selectivity while maintaining manufacturing feasibility through modular assembly on the lead.
2Object-affected harmful factors
If radially segmented electrode arrays are used to improve radial selectivity, then unwanted stimulation of neighboring neural tissue is reduced, but device complexity increases due to the need for a rail system and multiple electrodes
Solution Approach 1:
A rail system is introduced as an intermediary structure that provides mechanical support and precise positioning for the radially segmented electrodes. The rail includes features such as electrode receptacles and alignment guides that simplify the assembly process and ensure proper spatial relationships between electrodes, thereby reducing overall device complexity despite the increased number of components.
3Ease of manufacture
If traditional ring electrodes are used, then manufacturing is easier, but the duration of time for proper therapeutic effect to be obtained is increased
Solution Approach 1:
Each radially segmented electrode is designed with specific local properties including optimized dimensions, spacing, and current delivery characteristics tailored to the specific brain target being stimulated. This local optimization allows for more precise and effective stimulation, reducing the time required to achieve therapeutic effects compared to uniform ring electrodes.
Data Source
AI summary
A device for brain stimulation includes a lead having a longitudinal surface and a distal end. The lead includes a longitudinal rail disposed within the distal end of the lead. The longitudinal rail includes at least two prongs, each prong being configured and arranged to receive at least one segmented electrode. The lead further includes a plurality of segmented electrodes disposed along the longitudinal surface of the lead near the distal end of the lead. Each of the plurality of segmented electrodes is coupled to one of the at least two prongs of the rail.