Transcranial Stimulation Electrode Enclosure with Conductive Fluid

Resolve Bottlenecks,
Find Innovative SolutionsGenerate Solutions

Solution Overview

Problem

Current transcranial direct current stimulation (tDCS) systems are limited by the potential for tissue damage and restricted application time due to direct electrode contact with the skin, which restricts the duration and power of electrical current delivery.

Innovation Solution

A system with electrodes positioned within an enclosure spaced from the skin, using conductive fluid to apply low frequency oscillatory or direct current to the brain, shielding the electrode from tissue contact and allowing for longer and higher power applications without collateral damage or excessive Faradic product concentration.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of operation

If electrodes are placed directly on the scalp for tDCS, then current delivery is simple and direct, but tissue damage and excessive Faradic product concentration occur limiting application time and power

Engineering Contradiction:

Improveelectrode placement simplicityVSAvoidtissue damage and Faradic product concentration

Core Design Contradiction:

Ease of operationVSObject-affected harmful factors

Solution Approach 1:

The patent introduces an intermediary conductive gel medium between the electrode and the scalp. This gel serves as a mediator that allows electrical current to pass through while preventing direct harmful contact between the electrode and tissue, thereby reducing tissue damage and controlling Faradic product concentration at the tissue interface.

Inventive Principle:

Principle #24Intermediary (Mediator)

Solution Approach 2:

The patent employs a flexible electrode cap or interface layer that distributes current more evenly across the scalp surface. This flexible interface acts as a protective barrier that prevents concentrated current density from damaging the underlying tissue while still allowing effective current delivery for neural modulation.

Inventive Principle:

Principle #30Flexible shells and thin films

2Power

If higher power levels are applied for longer durations to improve treatment efficacy, then neuronal modulation effectiveness increases, but tissue damage risk increases

Engineering Contradiction:

Improveelectrical current power levelVSAvoidtissue safety

Core Design Contradiction:

PowerVSReliability

Solution Approach 1:

The patent implements protective measures in advance by using a conductive gel interface and optimized electrode design that cushion against potential tissue damage before it occurs. This pre-protective approach allows the system to safely deliver higher power levels for extended durations by preventing the accumulation of harmful effects at the tissue-electrode interface.

Inventive Principle:

Principle #11Beforehand cushioning (Prior cushioning)

3Duration of action of moving object

If application time is extended to improve treatment outcomes, then neuronal modulation effectiveness increases, but Faradic product concentration becomes excessive causing tissue damage

Engineering Contradiction:

Improvestimulation durationVSAvoidFaradic product concentration

Core Design Contradiction:

Duration of action of moving objectVSObject-generated harmful factors

Solution Approach 1:

The conductive gel acts as an intermediary buffer that accumulates Faradic products away from the tissue interface during extended stimulation sessions. This mediator allows prolonged current delivery by capturing harmful electrochemical byproducts before they can concentrate at the sensitive tissue boundary, thereby enabling longer treatment durations without excessive Faradic product accumulation.

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

Enables safer and more effective modulation of neuronal activity for extended periods, reducing tissue damage risks and allowing for higher power levels, thereby improving treatment efficacy for neurological disorders such as schizophrenia and depression.

Implementation Method 1

using conductive fluid to apply low frequency oscillatory or direct current to the brain

Methodology Applied

Scientific EffectElectrical conduction: Conduction (electrical)

Implementation Method 2

shielding the electrode from tissue contact and allowing for longer and higher power applications without collateral damage or excessive Faradic product concentration

Methodology Applied

Scientific EffectPhysical barrier shielding: Physical Containment

Data Source

PatentUS8682449B2Methods and apparatus for transcranial stimulation

Publication Date: 2014.03.25 ELECTROCORE INC

AI summary

Systems, apparatus and methods are described for applying electric current to neurons in the brain to treat disorders and to improve motor and/or memory functions in a patient. In a method according to the invention, an electrode is positioned adjacent to and spaced from the skin surface of the patient's head and an electric current is applied through the electrode to a target region in the brain to modulate one or more neurons in the target region. The electrode is housed within an enclosure and spaced from the skin surface so that the electrode does not directly contact the patient's tissue, which reduces the potential for collateral tissue damage or necrosis and shields the electrode from the patient's tissue which substantially inhibits Faradic products (e.g., H+, OH−, H2O2) of the electrode from reaching the target site.