RU2458652C2 - Device for radio-frequency polishing of face and body skin - Google Patents

Abstract

FIELD: medicine.

SUBSTANCE: invention relates to medical equipment and can be applied for rejuvenation of atrophic skin of face and body by method of coblation. Device contains generator of continuous high-frequency current, active electrode, made in form of at least one electrode, and passive electrode. Passive electrode is made with rectangular hole on its distal end, in which said active electrode is fixed. Active electrode has straight-line working part.

EFFECT: application of device will make it possible to increase quality of electrosurgical impact in carrying out polishing sections of skin due to construction of electrodes, creating uniform electric field.

4 cl, 1 dwg

Description

The invention relates to aesthetic medicine and may be applicable for rejuvenation of atrophic skin of the face and body (for example, to eliminate wrinkles on the face, especially around the mouth and eyes) by cobulation. To implement this method, an electroconductive solution is supplied between the electrodes and the tissue. When using a sufficiently high voltage difference between the electrodes, the electrically conductive liquid is converted into an ionized vapor layer - a plasma. During the procedure, a temperature is created that lies in the range (40-70) ° С, which leads not only to the effect of ablation, neocologenesis and activation of skin regeneration, but also to the coagulation of capillaries, which allows for bloodless coblation. This mechanism of action of coblation underlies the removal of the surface layers of the epidermis with minimal thermal burn of the underlying skin layers.

A device is known (US 5746746, "Electrosurgical electrode and method for skin resurfacing"), used to polish human skin, in which high-frequency current is supplied to the biological tissue through a monopolar (active) electrode applied directly to the skin in the zone of involutionally altered tissues. A device for implementing this method comprises a high-frequency current generator (HF current), a working tool connected by an electric cable to a high-frequency generator (HF generator). A wire electrode made in the form of a loop is fixed at the distal end of the working tool. The grinding method consists in moving the loop electrode to which the RF current is supplied over the surface of the biological tissue. The disadvantage of this method is the flow of high-frequency current from the active electrode to the passive electrode through the entire body of the patient.

Closest to the proposed invention relates to a device (US 6309387, "Systems and methods for electrosurgical skin resurfacing"). In this device, taken as a prototype consisting of a continuous RF current generator connected to the input connectors of a bipolar working tool, the biological tissue is exposed to the distal part of the working tool using an active and passive electrode. The active electrode is a set of needle electrodes (a single-electrode version is also possible), pressed into a dielectric matrix. The second, larger area, the passive electrode is a metal ring surrounding the active electrodes. The disadvantages of this method include:

1) the active electrodes are structurally combined and therefore are at different distances from the passive electrode, as a result of which, and therefore, the electric field between them is inhomogeneous. This leads to uneven depth of ablation of biological tissues in the field of electrosurgical exposure, the possibility of formation of marginal necrosis zones, and the possibility of disruption of the cobulation regime with the transition to the thermal regime of exposure;

2) the RF current generator operates in a continuous mode, which can lead to uncontrolled overheating of the biological tissue.

To eliminate the above disadvantages, a device and method for solving the problem of improving the quality of the electrosurgical effects when polishing skin areas is proposed.

To implement the impact of the RF current on the biological tissue in the proposed device using a special design of the electrodes that create a uniform electric field.

Figure 1 is a device for grinding leather according to the present invention.

Figure 2 is a sectional view of the distal end of the device according to the present invention.

Figure 3 represents the distal end of the device according to the present invention.

Figure 1 shows a device for grinding leather according to the present invention. The device is made in the form of a handle 3, to which an RF current 2 delivery cable and a flexible catheter for delivering an electrolyte solution 1, a rigid tube adapter 4 and a working part are connected. A rigid tube adapter 4 with an insulating outer shell is a continuation of the handle 3 and contains insulated current-carrying conductors and channels for supplying an electrolyte solution. The distal end of the adapter ends with a working part, which is a structure in the form of a metal “foot”, the lower plane of which is a passive electrode 5. At the same time, a dielectric U-shaped insert 7 with a rectilinear active electrode 6 is additionally fixed at the end of the “foot” (Figure 2 or 3) so that the passive electrode 5 has a rectangular hole at its distal end, and the active electrode 5 is fixed in said hole.

The proposed device for grinding leather works as follows. An RF current generator is connected to the electrodes through cable 2, and an electroconductive solution is supplied between the electrodes and the tissue using a catheter. When a high-frequency voltage is applied to the electrodes, the electrically conductive solution between them turns into a cold plasma, which destroys the intercellular bonds. To create a uniform electric field between the electrodes 9, the active electrode 6 is made rectilinear, in the form of a long straight thread (Figure 2, b), or in the form of a metal insulated plate with a bare edge 10 (Figure 2, a), and a passive flat electrode 5 has a working face parallel to the active electrode.

The active electrode 6 is fixed in a dielectric U-shaped insert 7, and the plane of the dielectric insert coincides with the plane of the passive electrode. In this case, the active electrode can move in height relative to the plane of the passive electrode in the range from 0 to 1.5 mm. This achieves the ability to work with skin 8, with different elasticities. In order to implement stable operation, the device provides for the possibility of supplying a forced and controlled flow of an electrically conductive solution supplied to the exposure area. The dielectric insert 7 is made of zirconia, which has high strength and wear resistance, absolute chemical inertness, biological compatibility with tissues of a living organism and electromagnetic inertness.

In contrast to the known method, human skin is polished using a pulse-periodic radio-frequency current supplied to the patient’s skin using a smoothly moving bipolar working tool with active and passive electrodes at the distal end, with a total exposure time of 15 to 20 minutes. The RF current generator operates in a pulse-periodic mode, allowing the biological tissue to cool during a pause between current pulses. The operating frequencies of the device are selected in the range of 0.10-29.04 MHz from the allowed frequencies. The duration of the RF current pulses is selected in the range of 50-500 μs, and their repetition frequency is in the range of 100-1000 Hz. In this case, the parameters of the RF current are used that do not cause the appearance of thermal erythema.

The duration of the session and the number of procedures depend on the area of the treated area and the problem being solved. Depending on age, skin condition and problem being solved, 1 to 4-5 procedures are required.

Claims (6)

1. Device for grinding atrophic skin of the face and body, containing a continuous high-frequency current generator, an active electrode made in the form of at least one electrode, and a passive electrode, characterized in that the passive electrode is made with a rectangular hole at its distal end, in which said active electrode is fixed, while the active electrode has a rectilinear working part. 2. The device according to claim 1, characterized in that the active electrode is made in the form of a thread that is parallel to the larger face of the aforementioned hole. 3. The device according to claim 1, characterized in that the active electrode is made in the form of a metal plate with a bare edge, which is parallel to the larger face of the hole. 4. The device according to any one of claims 1 to 3, characterized in that the active electrode is arranged to move along the height of the passive electrode in the range from 0 to 1.5 mm. 5. The device according to claim 1, characterized in that the passive electrode has a working face parallel to the active electrode. 6. The device according to claim 1, characterized in that the distal end of the passive electrode is made of crystalline nanostructured partially stabilized zirconia.

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