Circular Electrode RF Therapy Device for Homogeneous Field Distribution
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Solution Overview
Problem
Existing radiofrequency therapy devices face challenges in achieving optimal electrode arrangement and distribution for capacitive RF methods, leading to uneven heating and potential burns due to high ohmic resistance and edge effects, particularly when using two electrodes of similar size in a handpiece.
Innovation Solution
A device with two electrically insulated, circularly arranged capacitor electrodes, one encircled by a ring-shaped electrode, allowing for a bell-shaped support that integrates vacuum therapy, optimizing the RF electric field distribution and reducing local maxima, while enabling simultaneous vacuum therapy for improved tissue contact and blood circulation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If two electrodes of similar size are used in a handpiece for capacitive RF therapy, then the applied RF voltage is considerably lower, but the distribution of electric field becomes uneven with local maximums appearing on edges causing potential burns
Solution Approach 1:
The patent employs circular electrodes instead of rectangular ones to eliminate sharp edges where electric field concentration occurs. The circular geometry ensures smooth field distribution across the electrode surface, preventing local maximums that would cause uneven heating and potential burns while maintaining the beneficial low-voltage operation of bipolar capacitive RF therapy.
2Temperature
If the contact surface of the electrode is decreased, then the current density increases causing desired heating in the body, but the voltage decrease due to high ohmic resistance causes heating in epidermis and upper skin layers leading to undesired burns
Solution Approach 1:
The patent utilizes capacitive RF therapy with high frequency (0.1-10 MHz) to change the electrical parameters of tissue interaction. This frequency-dependent capacitive coupling allows current to pass through the high-impedance epidermal layer without significant heating, while the subcutaneous tissue with its higher water content and different dielectric properties absorbs the RF energy efficiently, achieving deep heating without superficial burns.
3Device complexity
If electrodes are arranged one next to another, then the device structure is simplified, but the homogeneity of the RF field decreases
Solution Approach 1:
The patent employs a concentric circular arrangement where one electrode is positioned inside the other, forming nested circular patterns. This geometric configuration maintains rotational symmetry and ensures uniform electric field distribution across the treatment area, as each point on the skin surface experiences equivalent field conditions regardless of angular position, thereby achieving field homogeneity while keeping the structure relatively simple.
4Ease of manufacture
If rectangular electrodes are used, then manufacturing is easier, but huge electric fields appear on the edges causing uneven distribution of therapy effects and damages
Solution Approach 1:
The patent replaces rectangular electrode geometry with circular shapes to eliminate the edge effects inherent in rectangular designs. The curved boundaries of circular electrodes prevent the concentration of electric field lines at sharp corners, ensuring uniform field distribution across the entire electrode surface and eliminating the local maximums that would cause tissue damage, while the manufacturing complexity increase is minimal.
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 circular electrode arrangement ensures homogeneous RF field distribution, deeper tissue heating, and reduced risk of burns, enhancing therapy efficacy and comfort by maintaining even heating and improving blood circulation.
Implementation Method 1
capacitive - based on capacitive resistance... Only capacitive current not causing heating runs between the electrodes being capacitor panels. Its high frequency causes potent polarisation of dipolar water molecules in tissue. These try to follow the frequency of the forced voltage of the electric field in which they are present and consequently cause the heating of tissue.
Implementation Method 2
Its high frequency causes potent polarisation of dipolar water molecules in tissue. These try to follow the frequency of the forced voltage of the electric field in which they are present and consequently cause the heating of tissue.
Implementation Method 3
The bell-shaped support creates the conditions for vacuum therapy... allowing for simultaneous vacuum therapy for improved tissue contact and blood circulation
Data Source
AI summary
A device for radiofrequency (RF) circular deep therapy of the invention belongs to the field of devices for aesthetic medicine and cosmetics and solves a problem of construction of an application handpiece, in which both capacitor electrodes are mutually distanced and have such surface that the depth of operation of RF currents allows for a maximum yield of an RF source. Said device for radiofrequency circular deep therapy of the invention disposes apart from an application handpiece over a power supply, a generator of a radiofrequency signal and a vacuum pump and is characterised in that said handpiece houses two galvanically insulated electrodes of a capacitor arranged in a way that the first electrode of the capacitor of a circular shape is encircled by another electrode in the shape of a circular ring, wherein the circular electrode is housed within a dielectric housing and the second electrode is bent from the bottom upwards in the shape of a circular ring. Said device for radiofrequency circular deep therapy of the invention may also be without the vacuum pump.