Steering Target Poles in Electrode Arrays
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Solution Overview
Problem
Current Spinal Cord Stimulation (SCS) systems face challenges in efficiently steering electrical currents between implantable electrodes to optimize therapeutic outcomes, as existing methods are limited in flexibility and precision, particularly in adjusting stimulation parameters and electrode configurations to effectively treat chronic pain and other neurological disorders.
Innovation Solution
A system with a graphical user interface (GUI) and controller circuitry that executes a steering algorithm to adjust the position and amplitude of target poles within an electrode array, allowing for more precise control over stimulation by automatically reducing amplitudes when target poles reach the array boundary and modifying configurations from tripole to bipole, enabling improved recruitment of nerve fibers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If manual electrode configuration methods are used in traditional SCS systems, then the system structure remains simple, but the flexibility and precision of steering electrical currents between electrodes are limited
Solution Approach 1:
The patent replaces manual mechanical configuration methods with an automated computer-controlled system that uses software algorithms to calculate and adjust electrode configurations, current amplitudes, and target pole positions, thereby increasing precision while managing complexity through automation
Solution Approach 2:
The system dynamically changes multiple parameters including electrode configuration, current amplitude, frequency, pulse width, and target pole position based on real-time feedback and optimization algorithms, allowing precise control of electrical stimulation without manual reconfiguration
2Adaptability or versatility
If fixed electrode configurations are used, then the device complexity is reduced, but the ability to optimize therapeutic outcomes for different neurological disorders is limited
Solution Approach 1:
The patent implements dynamic electrode configurations where the system can automatically adjust which electrodes are active, their polarities, and current amplitudes based on therapeutic goals and real-time performance, transforming a static system into an adaptable one that responds to changing physiological conditions
Solution Approach 2:
The control system is designed to handle multiple therapeutic applications and electrode arrangements through a unified algorithmic framework that can optimize configurations for different neurological disorders, making the system versatile without requiring separate dedicated systems for each application
3Measurement precision
If automated steering algorithms are implemented to control target poles, then the precision of nerve fiber recruitment is improved, but the computational complexity and processing requirements increase
Solution Approach 1:
The steering algorithm operates autonomously to calculate optimal target pole positions and electrode configurations without requiring continuous manual intervention, with the system self-adjusting parameters based on predefined optimization criteria and real-time feedback from the stimulation response
4Productivity
If manual adjustment of current amplitudes is used, then the system remains simple to operate, but the efficiency of optimizing therapeutic stimulation is reduced
Solution Approach 1:
The system incorporates feedback mechanisms where the results of electrical stimulation are monitored and used to automatically adjust current amplitudes and electrode configurations in subsequent iterations, enabling efficient optimization of therapeutic outcomes without requiring manual trial-and-error adjustment by the operator
Data Source
AI summary
Techniques for steering of target poles formed by implantable electrodes in a stimulator device are disclosed. The steering technique modifies the relative amplitude of target poles once they are steered to an electrode array boundary. Once a target pole is steered to an electrode array boundary, further steering in the direction of that boundary results in a gradual decrease in the relative amplitude of that target pole. Eventually, continued steering in that direction will cause that target pole to disappear. Thus, in the case of a target tripole, continued steering will eventually cause the target tripole to be automatically converted into a target bipole. In another example of steering, target poles defined linearly in one direction can be split in an orthogonal direction to create a target pole configuration that is two-dimensional.