Neuromodulation System Dynamic Electrode Impedance Selection
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Solution Overview
Problem
High-frequency neuromodulation therapies require relatively high energy levels, leading to frequent recharging needs, which is a drawback compared to low- to mid-frequency therapies, and there is a need to decrease energy requirements for effective neuromodulation.
Innovation Solution
The neuromodulation system automatically selects a second set of electrodes with lower combined impedance than the first set to deliver electrical energy at higher frequencies, either by adding electrodes or replacing them with electrodes of lower impedance, allowing for more efficient energy delivery.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If high-frequency neuromodulation is used to provide therapeutic effect, then therapeutic efficacy is improved, but energy consumption increases
Solution Approach 1:
The system dynamically adjusts electrode configuration based on operating frequency. At high frequencies, the controller automatically selects electrode combinations with lower combined impedance to reduce energy consumption, while at low frequencies it can use higher impedance configurations. This dynamic adaptation resolves the contradiction between maintaining therapeutic efficacy at high frequencies and reducing energy consumption.
Solution Approach 2:
The invention changes the electrical parameter (impedance) of the electrode configuration based on the operating frequency. By selecting different electrode combinations with specific impedance characteristics matched to the desired frequency range, the system optimizes energy efficiency while maintaining therapeutic effectiveness across different frequency regimes.
2Reliability
If high-frequency neuromodulation is used to block action potentials, then therapeutic effect is improved, but battery life decreases
Solution Approach 1:
The controller dynamically selects electrode configurations optimized for high-frequency operation, automatically switching to lower impedance combinations when high-frequency stimulation is required. This dynamic parameter adjustment extends battery life by minimizing energy consumption during high-frequency therapeutic sessions while maintaining the desired action potential blocking effect.
3Use of energy by moving object
If electrode impedance is reduced to decrease energy requirements, then energy efficiency is improved, but electrode configuration complexity increases
Solution Approach 1:
The system performs self-configuration by automatically selecting appropriate electrode combinations based on the desired operating frequency. The controller evaluates available electrode configurations and autonomously chooses the optimal set that provides the required impedance characteristics, eliminating the need for manual configuration and reducing the burden on users while maintaining energy efficiency.
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 reduces energy consumption during high-frequency neuromodulation, extending the battery life and reducing the frequency of recharging needs while maintaining therapeutic efficacy.
Implementation Method 1
electrical energy conveyed between at least one cathodic electrode and at least one anodic electrode creates an electrical field, which when strong enough, depolarizes (or 'stimulates') the neurons beyond a threshold level, thereby inducing the firing of action potentials
Implementation Method 2
electrical pulses can be delivered from the neuromodulation device to the electrode(s) to activate a volume of tissue
Implementation Method 3
the charger typically includes an alternating current (AC) charging coil that supplies energy to a similar charging coil located in or on the neuromodulation device
Data Source
AI summary
An electrical neuromodulation system and method of treating an ailment of a patient using a neuromodulation device. Electrical modulation energy is delivered at a first frequency from the neuromodulation device to a first set of electrodes having a first combined electrode impedance. A second set of electrodes having a second combined electrode impedance less than the first combined electrode impedance is automatically selected. The electrical modulation energy is delivered at a second frequency to the second set of electrodes, wherein the second frequency is greater than the first frequency.