Electrode Positioning for Inflammatory Reflex Stimulation
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Solution Overview
Problem
Current systems for stimulating the inflammatory reflex, such as the Vagus nerve, face challenges in precise localization and minimization of side effects due to non-homogeneous in-vivo electrical conductivity and organ activation characteristics, leading to unintended collateral stimulation and reduced efficacy.
Innovation Solution
The development of systems and methods that optimize electrode positioning and stimulation parameters by detecting and measuring stimulation artifacts in real-time, using sensors to minimize undesirable effects and maximize target response, including the use of high-bandwidth amplifiers and signal processing techniques to separate intentional and artifact signals.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If electrodes are positioned to stimulate the Vagus nerve for inflammation inhibition, then the therapeutic effect is improved, but unintended collateral stimulation and side effects occur
Solution Approach 1:
The patent applies local quality by using a multi-electrode array where different electrodes have different functions: some electrodes are configured for stimulation while others are configured for sensing. This allows localized stimulation of the target nerve while using adjacent electrodes to detect and avoid collateral stimulation of surrounding tissues.
Solution Approach 2:
The patent implements feedback by using sensing electrodes to continuously monitor the stimulation field and detect unintended activation of collateral nerves or muscles. This real-time feedback allows the system to adjust stimulation parameters to maintain therapeutic effect while minimizing side effects.
2Reliability
If stimulation parameters are increased to overcome non-homogeneous electrical conductivity, then the target response is improved, but side effects and artifacts increase
Solution Approach 1:
The patent applies dynamics by making the stimulation parameters adaptive rather than fixed. The system continuously adjusts stimulation intensity, pulse width, and frequency based on real-time feedback from sensing electrodes, allowing optimal target response while minimizing artifacts in non-homogeneous tissue environments.
Solution Approach 2:
The patent implements parameter changes by varying multiple stimulation parameters (amplitude, pulse duration, frequency, waveform shape) to achieve effective neural activation while staying below thresholds that cause collateral stimulation or visible artifacts.
3Object-affected harmful factors
If electrode position is adjusted to minimize side effects, then collateral stimulation is reduced, but precise localization becomes more difficult
Solution Approach 1:
The patent applies universality by designing electrodes that serve multiple functions: they can both deliver stimulation and sense electrical activity. This multi-functionality allows the same electrode structure to be used for therapy while simultaneously providing localization and safety monitoring capabilities.
Solution Approach 2:
The patent uses sensing electrodes as intermediaries between the stimulation electrodes and the target nerve. These intermediary electrodes detect the electrical field and provide information about electrode positioning and tissue response, enabling precise localization without requiring direct invasive measurement.
4Measurement precision
If real-time artifact detection is implemented, then stimulation optimization is improved, but device complexity increases
Solution Approach 1:
The patent applies merging by combining the stimulation and sensing functions into a single integrated electrode array and control system. This integration reduces the need for separate monitoring equipment and simplifies the overall system architecture while enabling real-time artifact detection and stimulation optimization.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This approach allows for precise modulation of the inflammatory reflex, reducing side effects like muscle twitch and cardiac effects, and enhancing the effectiveness of inflammation inhibition while minimizing collateral stimulation.
Implementation Method 1
A system for stimulating one or more nerves of the inflammatory reflex may include one or more electrical leads which may be implanted acutely or chronically, and may be positioned adjacent or in contact with the Vagus nerve or other nerves of the inflammatory reflex
Implementation Method 2
The practical significance of this non-homogeneity is that positional changes in the stimulating electrodes can shift the path of the activating current, or change the characteristics of the stimulating current itself
Data Source
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AI summary
Described herein are methods, devices and system for selecting an optimum position of a stimulation electrode, and particularly methods, devices and systems for optimizing the position of a stimulation electrode for stimulating the inflammatory reflex and thereby inhibiting inflammation. The methods, devices and systems described herein may generally include the analysis of one or more artifact modalities arising after the application of a stimulation pulse. One or more of these artifact modalities (e.g., EMG, ECG, etc.) may be detected and used to generate a comparable indicator of the fitness of the position of the electrode relative to a target, such as a portion of the inflammatory reflex like the vagus nerve.