Multi-channel Electrostimulation Apparatus Using High-Frequency AC
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Solution Overview
Problem
Existing transcranial electrostimulation devices using direct current cause discomfort and potential harm due to skin resistance issues and iontophoresis, limiting their effectiveness and user comfort.
Innovation Solution
A system employing a unique triple waveform asymmetry with alternating current signals, modulated by high and low frequency generators, to provide effective transcranial and peripheral electrostimulation without direct current, reducing capacitive resistance and discomfort.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If direct current is used to break down skin resistance, then current penetration to the brain is enabled, but skin discomfort and potential burning occur
Solution Approach 1:
The patent applies periodic alternating current at high frequency (e.g., 100 kHz) to temporarily break down skin resistance capacitance, allowing current penetration without the need for continuous direct current. The periodic nature of the AC signal enables repeated breakdown and recovery cycles, maintaining penetration effectiveness while avoiding the harmful effects of sustained DC application.
Solution Approach 2:
The patent changes the electrical parameters from direct current to alternating current with specific high frequency characteristics. This parameter change transforms the interaction with skin resistance from a continuous breakdown process to a periodic capacitance discharge process, enabling current penetration while eliminating the burning and discomfort associated with DC.
2Reliability
If thick pads are used to reduce skin resistance, then current flow is improved, but device complexity and discomfort increase
Solution Approach 1:
The patent extracts and eliminates the need for thick conductive pads by using high frequency AC current that can penetrate skin capacitance directly. The high frequency signal's ability to bypass the capacitive reactance of thin or no pads removes the requirement for these additional components, simplifying the device while maintaining effective current delivery.
Solution Approach 2:
The patent replaces the mechanical approach of using thick physical pads to reduce resistance with an electrical approach using high frequency AC current. This substitution uses the capacitive properties of the skin at high frequencies to achieve current penetration without mechanical intervention in the form of thick conductive materials.
3Reliability
If direct current is used for treatment, then therapeutic effect is achieved, but iontophoresis causes harmful substance migration
Solution Approach 1:
The patent uses periodic alternating current instead of continuous direct current, which prevents the directional ion migration characteristic of iontophoresis. The alternating polarity reverses the driving force that would otherwise cause harmful substances to migrate into the bloodstream, while still maintaining therapeutic effects through the periodic stimulation.
Solution Approach 2:
The patent converts the potential harm of iontophoresis into a benefit by using high frequency AC current that prevents directional ion migration. The alternating nature of the current creates no net directional force for ion transport, thereby eliminating the harmful effect while preserving the beneficial therapeutic stimulation effects.
4Reliability
If high current amperage is used to overcome skin resistance, then current penetration is achieved, but patient discomfort and pain increase
Solution Approach 1:
The patent changes the current parameters from high amperage DC to high frequency AC with lower amperage. The high frequency characteristic enables effective skin penetration through capacitive coupling at much lower current levels, significantly reducing patient discomfort and pain while maintaining adequate current delivery for therapeutic effects.
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
The system achieves therapeutic efficacy with lower current levels, enhancing user comfort and treatment effectiveness by eliminating direct current-related issues, such as pain and iontophoresis, while maintaining treatment duration and efficacy.
Implementation Method 1
The current pulses at selected frequencies are applied to cause reaction with the central nervous system of the patient... reducing or controlling migraine headaches... The direct current was used to break down or lower skin resistance to allow the treatment alternating current signals to penetrate the brain and nervous systems
Implementation Method 2
A system employing a unique triple waveform asymmetry with alternating current signals, modulated by high and low frequency generators
Data Source
AI summary
A therapeutic electrostimulation apparatus and method operates to supply electrostimulation signals to three channels. The basic electrostimulation signal for each of the channels is the same; and this signal is applied to a transcranial electrostimulation set of output electrodes. A second channel provided with the same signal is further operated to modulate the signal with a dual frequency signal pattern for the application of the second channel signal to a second set of electrodes, typically applied to the body near the spinal area. A third channel supplied with the basic electrostimulation signal modulates the electrostimulation signal during a portion of a treatment session with a diapason of frequencies varying randomly, and the output of this channel is applied to a set of electrodes at a local area for therapeutic treatment.