Electrical Stimulation Frequency Cycling to Prevent Neural Tolerance
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Solution Overview
Problem
Existing electrical stimulation technologies face limitations due to neurological tolerance, leading to reduced efficacy over time, as patients accommodate to the constant stimulation frequency and electrode placement.
Innovation Solution
A system that employs rapid frequency cycling and random electrode configurations to deliver aperiodic or pseudo-aperiodic electrical signals, adjusting current and voltage amplitudes based on patient feedback, to prevent neurological accommodation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If constant frequency electrical stimulation is delivered through fixed electrode contacts, then initial pain relief is achieved, but neurological tolerance develops over time reducing treatment efficacy
Solution Approach 1:
The system dynamically varies stimulation frequency across multiple bands (e.g., 20-100 Hz, 100-200 Hz, 200-500 Hz, 500-1000 Hz) and randomly switches between different frequency band groupings, preventing the nervous system from adapting to a constant stimulus pattern. This dynamic parameter modulation maintains treatment efficacy over extended periods.
Solution Approach 2:
The system employs periodic cycling through different frequency band groupings in random sequences, delivering each grouping for predetermined time intervals (e.g., 10 seconds to 5 minutes). This periodic variation with random sequencing prevents neurological accommodation while maintaining continuous therapeutic effect.
2Ease of operation
If stimulation parameters are kept constant throughout therapy, then device operation is simple, but patient accommodation reduces long-term effectiveness
Solution Approach 1:
The system automatically varies stimulation parameters including frequency band groupings, amplitude levels, and pulse widths without requiring manual intervention. The controller autonomously selects from multiple pre-programmed frequency band groupings and adjusts parameters based on predetermined algorithms, maintaining complex therapy while preserving ease of operation.
Solution Approach 2:
The system changes multiple stimulation parameters simultaneously including frequency (across different bands), voltage amplitude, current amplitude, and pulse duration. These parameter variations occur in coordinated patterns that prevent accommodation while maintaining therapeutic effectiveness.
3Adaptability or versatility
If a wide frequency range is used in electrical stimulation, then treatment versatility is improved, but signal generation complexity increases
Solution Approach 1:
The wide frequency range (e.g., 20-1500 Hz) is segmented into multiple discrete frequency bands (e.g., 20-100 Hz, 100-200 Hz, 200-500 Hz, 500-1000 Hz, 1000-1500 Hz). The system selectively activates specific bands or combinations of bands in different groupings, managing complexity through structured segmentation while maintaining treatment versatility.
Solution Approach 2:
A single electrical stimulation device performs multiple functions by delivering different frequency band groupings for various therapeutic conditions. The same hardware platform supports treatment of diverse conditions including neuropathic pain, chronic pain, and other neurological disorders through parameter variation alone.
Data Source
AI summary
A method of rapid frequency cycling during electrical stimulation according to an embodiment may include determining, by a controller of an electrical stimulation system, a plurality of frequency band groupings of discrete frequency bands of an electrical stimulation signal having a frequency range, wherein each frequency band grouping includes at least one discrete frequency band, wherein a corresponding current or voltage amplitude of the electrical stimulation signal is independently tuned within each discrete frequency band based on feedback received from a patient, determining, by the controller, a random sequence of the frequency band groupings of the plurality of frequency band groupings, generating, by at least one signal generator controlled by the controller, the electrical stimulation signal according to the determined random sequence of the frequency band groupings, and delivering the generated electrical stimulation signal through an electrode array to the patient to provide therapy to the patient.