Charge-Balanced AC Neurostimulation for mTBI Treatment

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Solution Overview

Problem

Conventional transcranial electrostimulation (tCES) devices face limitations due to the presence of direct current (DC) components, which cause discomfort and restrict the power that can be delivered, making them less effective for treating mild traumatic brain injury (mTBI) and post-concussion symptoms.

Innovation Solution

A dual symmetric charge-balanced alternating current (AC) electrical signal is delivered to the frontal cortex region of the brain, using a stimulation current with specific frequency patterns and amplitude modulation to evoke metabolic responses, reducing discomfort and enhancing treatment efficacy.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If conventional tCES devices use DC component to break down skin resistance and allow current penetration, then current penetration capability is improved, but patient discomfort increases due to intense pain or burns

Engineering Contradiction:

Improvecurrent penetration capabilityVSAvoidpatient discomfort

Core Design Contradiction:

ReliabilityVSObject-affected harmful factors

Solution Approach 1:

The patent removes the DC component from the treatment current, extracting the harmful element while preserving the therapeutic benefits through AC-only stimulation. This eliminates skin breakdown and patient discomfort while maintaining current penetration through optimized AC waveforms.

Inventive Principle:

Principle #2Taking out (Extraction)

Solution Approach 2:

The patent converts the harmful rectified DC component (which causes discomfort) into a beneficial treatment approach by using AC-only stimulation with controlled waveforms that prevent rectification effects, thereby eliminating pain while maintaining therapeutic efficacy.

Inventive Principle:

Principle #22Blessing in disguise (Convert harm into benefit)

2Object-affected harmful factors

If conventional tCES devices limit DC current levels to reduce patient discomfort, then patient comfort is improved, but treatment efficacy decreases due to upper power limit

Engineering Contradiction:

Improvepatient discomfortVSAvoidtreatment power

Core Design Contradiction:

Object-affected harmful factorsVSPower

Solution Approach 1:

The patent employs periodic AC waveforms with specific frequencies and duty cycles that deliver therapeutic power without creating harmful DC offsets. The alternating nature of the current prevents rectification and associated discomfort while maintaining sufficient power delivery for effective treatment.

Inventive Principle:

Principle #19Periodic action

Solution Approach 2:

The patent changes the current waveform parameters from DC or rectified AC to pure AC with specific frequency and amplitude characteristics, enabling higher power delivery without the discomfort associated with DC components while maintaining treatment efficacy.

Inventive Principle:

Principle #35Parameter changes

3Object-affected harmful factors

If AC-only stimulation is used to avoid DC component discomfort, then patient comfort is improved, but skin impedance rectification still generates DC component causing discomfort

Engineering Contradiction:

Improvepatient comfortVSAvoidrectified DC component

Core Design Contradiction:

Object-affected harmful factorsVSObject-generated harmful factors

Solution Approach 1:

The patent introduces controlled electrode interfaces and waveform shaping as intermediaries that prevent the rectification of AC signals by skin impedance. These intermediaries ensure that the AC current passes through the skin without generating harmful DC offsets that would cause discomfort.

Inventive Principle:

Principle #24Intermediary (Mediator)

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 higher power delivery deep into the brain without discomfort, improving treatment outcomes for mTBI and post-concussion symptoms by promoting neural entrainment and metabolic cleansing.

Implementation Method 1

an electrostimulation system produces a dual symmetric charge balanced alternating current electrical signal for delivery to the frontal cortex region of a patient's brain

Methodology Applied

Scientific EffectElectrical stimulation: Electrical Impedance Tomography

Data Source

PatentUS20250099756A1Passive electrical neurofeedback treatment method for mild traumatic brain injury and post-concussion symptoms

Publication Date: 2025.03.27 NEXALIN TECHNOLOGY INC

AI summary

Electrostimulation systems and methods are contemplated in which a high current level, charge balanced alternating current electrical signal is generated for delivery to a patient's brain for the treatment of mild traumatic brain injury (mTBI) and post-concussion symptoms. By stimulating the brain with a charged balanced stimulation current with a stimulation current envelope defining one or more series of pulses at particular frequencies and durations designed to evoke metabolic response in the neurons, significant improvements in efficacy and reductions in symptoms and pain may be achieved relative to earlier treatment techniques. Further advantages, especially in promoting neural entrainment, may be realized as well via utilizing multiple series of pulses at different frequencies, and via the dynamic adjustment of the stimulation waveform via incorporation of feedback signals in order to maintain charge balance in real-time.