Multimodal Spinal Cord Stimulation Using Composite Electromagnetic Fields
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Solution Overview
Problem
Conventional Spinal Cord Stimulation (SCS) therapies for chronic pain management rely on a single frequency electric field, which lacks a full understanding of the mechanism and is not optimized for individual patient needs, leading to suboptimal pain relief and potential side effects.
Innovation Solution
A multimodal stimulation system using composite electromagnetic fields with varying frequencies, amplitudes, and phase polarities applied through an array of electrodes to modulate glial and neuronal interactions, specifically optimizing signal parameters for improved pain relief with minimal power consumption, and optionally combining with pharmacological agents for enhanced efficacy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional single-frequency electric field is used for spinal cord stimulation, then the device complexity is low and ease of operation is high, but the pain relief effectiveness is suboptimal and mechanism understanding is incomplete
Solution Approach 1:
The patent combines multiple electromagnetic signal components with different frequencies, amplitudes, and phase polarities into a composite stimulation pattern. This merging of multiple signal types creates a multimodal stimulation approach that targets both neuronal and glial cells simultaneously, thereby improving pain relief effectiveness while managing the increased complexity through systematic parameter integration.
Solution Approach 2:
The patent systematically varies multiple signal parameters including frequency, amplitude, pulse width, and phase polarity to optimize stimulation effects. By changing these parameters in coordinated patterns, the system achieves better pain management outcomes and enhances understanding of stimulation mechanisms without requiring overly complex device architecture.
2Reliability
If conventional tonic SCS at 40-250 Hz is used, then the therapy has been clinically utilized for half a century with established protocols, but the mechanism is not fully understood and pain relief may have side effects
Solution Approach 1:
The patent transitions from static, fixed-frequency tonic stimulation to dynamic, time-varying stimulation patterns. The system employs time-dependent modulation of signal parameters including frequency sweeps, amplitude modulation, and phase variations, allowing the stimulation to adapt over time and better match the dynamic nature of pain pathways and cellular responses.
Solution Approach 2:
The patent segments the stimulation signal into distinct temporal and spectral components, each targeting different cellular populations. By dividing the composite signal into separable frequency bands and temporal phases, the system can independently optimize parameters for neuronal activation versus glial cell modulation, thereby enhancing mechanism understanding while maintaining treatment versatility.
3Reliability
If higher amplitude and frequency signals are used to improve pain relief, then the analgesic effect is enhanced, but the power consumption increases
Solution Approach 1:
The patent employs periodic modulation of signal parameters rather than continuous high-amplitude stimulation. By using rhythmic variations in frequency and amplitude with optimized duty cycles, the system achieves effective pain relief through resonant effects and temporal summation while reducing average power consumption compared to sustained high-intensity stimulation.
Solution Approach 2:
The patent optimizes the relationship between signal parameters to achieve efficient stimulation. By carefully coordinating frequency, amplitude, and pulse width changes, the system maximizes neural and glial cell activation efficiency, thereby improving pain relief efficacy while minimizing the energy required per unit of therapeutic effect.
Data Source
AI summary
Apparatus and methods for managing pain uses a single composite modulation/stimulation signal with variable characteristics to achieve the same results as separate varying electromagnetic signals. The composite signal is utilized for modulating the expression of genes involved in diverse pathways including inflammatory/immune system mediators, ion channels and neurotransmitters, in both the Spinal Cord (SC) and Dorsal Root Ganglion (DRG) where such expression modulation is caused by spinal cord stimulation or peripheral nerve stimulation using the disclosed apparatus and techniques.