Segmented Electrodes for Directional Deep Brain Stimulation
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Solution Overview
Problem
Current electrical stimulation systems for deep brain stimulation lack precise directional control, as ring electrodes do not allow for targeted angular range stimulation, limiting the ability to accurately steer current to specific areas within the brain.
Innovation Solution
The use of segmented electrodes on leads, which allow for radial positioning and three-dimensional targeting by varying the location and configuration of electrodes along the lead, enabling precise delivery of stimulation current to neural target tissues while minimizing stimulation of other tissues.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If ring electrodes are used for deep brain stimulation, then the stimulation system can deliver electrical current to target neurons, but the directional control and precision of current steering are limited
Solution Approach 1:
The ring electrode is divided into multiple segmented electrodes arranged circumferentially around the lead body. Each segment can be independently controlled to deliver stimulation current, enabling precise angular range control and three-dimensional current steering by selectively activating specific segments based on the target location.
Solution Approach 2:
The electrode configuration transitions from a two-dimensional ring structure to a three-dimensional segmented arrangement around the lead body. This adds the angular dimension to current delivery, allowing stimulation in multiple directions (radially, longitudinally, and angularly) and enabling precise targeting of neural structures in three-dimensional space.
2Adaptability or versatility
If segmented electrodes are used to improve directional control, then current steering capability is enhanced, but the device structure becomes more complex
Solution Approach 1:
The segmented electrode configuration serves multiple functions: it enables current steering in three dimensions, provides adjustable angular range control, and can be programmed to deliver stimulation patterns tailored to different neural targets. The same segmented electrode structure adapts to various stimulation requirements without requiring additional specialized components.
Solution Approach 2:
The stimulation system incorporates programmable control that allows dynamic adjustment of which electrode segments are activated and at what intensity levels. This dynamic configurability enables the system to adapt to different clinical scenarios, target locations, and patient responses without physical reconfiguration of the device.
3Reliability
If precise three-dimensional targeting is achieved through segmented electrodes, then stimulation effectiveness is improved, but the programming and operation complexity increases
Solution Approach 1:
The system incorporates automated programming capabilities that utilize pre-established models of neural target locations and stimulation field characteristics. The programming software can automatically calculate optimal electrode segment combinations and stimulation parameters based on the desired target, reducing the burden on clinicians and ensuring consistent, effective programming.
Solution Approach 2:
The system includes mechanisms for monitoring stimulation effects and adjusting parameters accordingly. By incorporating feedback from patient response and clinical outcomes, the programming can be optimized over time, making the complex segmented electrode system easier to operate through data-driven adjustments rather than requiring expert manual configuration for each case.
Data Source
AI summary
Method and systems for determining a set of stimulation parameters for an implantable stimulation device include performing the following steps or actions: receiving a stimulation target; determining a target stimulation field based on the stimulation target; receiving a weighting for a plurality of spatial regions defined relative to a lead including a plurality of electrodes, where a weighting for at least one of the spatial regions is different from a weighting for another one of the spatial regions; and determining, using the weightings for the plurality of spatial regions, a set of stimulation parameters to produce a generated stimulation field that approximates the target stimulation field.