RU26004U1 - DEVICE FOR HIGH-FREQUENCY THERAPY AND ELECTRODE ORIENTATION SYSTEM FOR IT - Google Patents

Abstract

1. Device for high-frequency therapy, comprising a generator of an electric UHF field and at least two electrodes connected to it, each equipped with an applicator made in the form of a chamber filled with a liquid dielectric, having one of its walls in contact with the electrode and having an elastic working wall, characterized in that the chamber of at least one applicator is made in the form of a bellows, one end wall of which is in contact with the electrode, and its second end wall is working. The device according to claim 1, characterized in that the bellows has a cross section increasing towards the working wall. The device according to claim 1 or 2, characterized in that the bellows is made of elastic material. A device according to any one of claims 1 to 3, characterized in that each applicator, made in the form of a bellows, is additionally equipped with a second chamber of elastic material in contact with the specified first chamber on the surface of its working wall and filled with a liquid dielectric, while the volume of the second chamber is selected taking into account the fulfillment of the condition that, in a position where the distance between the opposite walls of the second chamber in the direction of the electric UHF field intensity lines ensures their sliding relative to each other, the cross-sectional area The second chamber in a plane perpendicular to the direction of the tension lines exceeds the area of the working wall of the first chamber. 5. The device according to claim 4, characterized in that the working wall of the first chamber in contact with each other and the wall of the second chamber are made integrally. The device according to claim 4 or 5, characterized in that as a liquid dielectric

Description

Device for high-frequency therapy and electrode orientation system for it

Technical field

The proposed utility model relates to medicine, and more specifically to a device for high-frequency tyranny.

The device can be successfully used in medical hospitals for local hyperthermia of malignant tumors: osteogenic sarcoma, larynx cancer, thyroid cancer, melanoma, breast cancer, Ewing sarcoma, chondrosarcoma, skin cancer, hypernephroid kidney cancer, lung cancer, lymphogranulomatosis, tumors gastrointestinal tract, as well as in the treatment of chronic diseases: late radiation injuries of tissues and organs, prostatitis, prostate adenoma, hepatitis, endometritis, pyelonephritis, ambition ei, progressive paralysis, non-specific inflammatory diseases of the lungs and other organs, polyarthritis, brucellosis, neuritis, neurodermatitis, psoriasis, eczema, streptoderma, infectious allergic asthma, cystitis, adnexitis.

State of the art

Currently, methods for treating chronic diseases and malignant tumors by overheating (hyperthermia) of the corresponding pathological focus inside the patient’s body (human or animal) to 43 ° -45 ° C by penetrating electromagnetic waves of ultrahigh frequency (UHF), magnetic and electric fields of ultrahigh and high frequencies.

A device for hyperthermia is known, comprising a generator of electric microwave oscillations and an antenna connected to this generator, emitting electromagnetic waves to a predetermined area of the patient’s body.

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electromagnetic oscillations of 0.4-2.4 GHz (Devyatkov ED and others, "Advances in Physical Sciences, 1981, v. 134, p. 158-163).

However, a device operating in the microwave range, allows you to overheat only not deep (1-3 cm) located tissue of the patient due to the low penetrating ability of electromagnetic radiation in this range.

For hyperthermia, tumors deeply located from the surface of the body concentrate energy due to the superposition of the electromagnetic field from several geometrically spaced emitting antennas. For the purpose of hyperthermic influence on the volume of a tumor of complex geometric shape, they control the localization of the concentration zone of microwave energy in the body area by changing the phase and amplitude of the exciting current supplied to the antennas. Here, the heterogeneity of the electrical properties of specific living tissues that are affected by the microwave field, in particular, the unevenness of the resistance, the uneven distribution of the dielectric and magnetic permeability in them, must be taken into account.

It is also known a device for supplying microwave energy to the patient’s body with heat removal of excess energy from surface layers, for example, fatty, with hyperthermia of deeply located tumors, containing an applicator in the form of a chamber with an elastic, adapted to the shape of the patient’s body surface, working wall filled with liquid cooled dielectric and inside which a radiating antenna is placed (US, A, 4756311).

With hyperthermia of extended tumors of complex geometric shape, this device provides the ability to move the antenna inside the applicator chamber, for which this camera is made 2-3 times larger than the antenna.

it is necessary to use several applicators with antennas and devices for controlling the movement of antennas relative to the body, in this case the patient becomes uncomfortable due to his low mobility, limited by several applicators, and also there is a need for time-division of a painful procedure for moving antennas with applicators.

In any case, the small depth of penetration of the microwave field into the tissue and the uncertainty of the combinations of electrical parameters of the tissues when the antenna moves relative to the body do not accurately localize the heat in the interior of the patient during microwave heating.

More promising is the method of local hyperthermic exposure to malignant tumors by the electric field of the ultra-high-frequency (UHF) range of 8-150 MHz.

The UHF field penetrates living tissues 10 and more times deeper and the distribution of heat in depth and volume is more uniform than with microwave hyperthermia.

The specified method is implemented by a device containing an electric UHF field generator, the output circuit of which is loaded on a capacitor consisting of electrodes, between which is located the area of the patient’s body in which the malignant tumor is the object of the therapeutic effect of the UHF electric field. Such UHF heating is called condenser or capacitive.

In particular, a device for high-frequency therapy is known, comprising an electric UHF field generator and at least two electrodes of conductive material connected to it, each equipped with an applicator made in the form of a chamber filled with a liquid cooled dielectric in contact with one of its walls with an electrode and having an elastic working wall opposite this adapted to interact with

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the surface of the patient’s body (US, A, 889010). This device is the closest to the proposed.

In this device, the side walls of the chambers of the applicators are rigid, therefore, not universal in shape, therefore, they are poorly adapted along the perimeter to the various surface curvatures and elasticities of the patient’s body in its various parts subject to therapeutic treatment.

In addition, when using the known device, there is a deterioration in patient comfort during the procedure as a result of deformation by the rigid walls of the applicator of the patient’s body with uneven pressure around the perimeter.

One of the possible ways to eliminate this drawback is the manufacture of multiple removable applicators with various rigid walls in shape that meet the requirements of adaptation to different curvatures of the patient's body. But he is very expensive.

The way to partially eliminate this drawback due to the gap provided between the patient’s body and the rigid walls of the applicator chamber is unacceptable due to the fact that under the influence of the pressure of the liquid dielectric in the chamber the elastic working wall bulges out beyond the geometric contours of the perimeter of the rigid walls and, thereby, impairs the accuracy of localization UHF electric field in a given area of the body.

In addition, the design of the applicator chamber of the known device does not allow the electrodes of the device to be moved relative to the surface of the patient’s body without terminating the active phase of the procedure, namely the generation of an UHF electric field and cooling the body with a liquid dielectric under pressure in the applicator chamber. This is due to the fact that the elastic working wall of the applicator chamber under the influence of the pressure of the liquid dielectric in it creates frictional forces on the contact surface with the patient’s body that impede movement.

in general, this leads to a lack of effectiveness of hyperthermia, a long time for carrying out a painful procedure in uncomfortable conditions, and a low coefficient of use of the known device due to the need to interrupt the active phase of the procedure for moving the electrodes to another position.

Utility Model Essence

The utility model is based on the task of creating a device for high-frequency therapy, in which the applicators would have a design that is highly adaptable to different reliefs of the patient’s body surface and allows the electrode to move relative to the patient’s body without interrupting the active phase of hyperthermia, which would maximize the accuracy of heat localization in a given area of the body and, ultimately, increase the effectiveness of treatment.

The problem is solved in that in a device for high-frequency therapy containing an electric UHF field generator and at least two electrodes connected to it, each equipped with an applicator made in the form of a chamber filled with a liquid cooled dielectric in contact with one of its walls with an electrode and having the elastic working wall opposite to this, according to the invention, the chamber of each applicator is made in the form of a bellows, one end wall of which is in contact with the electrode; and its second end wall is working.

The bellows can be made with increasing cross-section towards the working wall, it can also be made entirely of elastic material.

It is advisable that each applicator is additionally equipped with a second chamber of elastic material in contact with the specified first chamber on the surface of the working wall filled with liquid

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dielectric. In this case, the volume of the second chamber should be selected taking into account the fulfillment of the condition that in the position where the distance between the opposite walls of the second chamber in the direction of the electric UHF field intensity lines is I I μm, the cross-sectional area of this chamber in a plane perpendicular to the direction of the tension lines exceeds the area the working wall of the first chamber.

It is reasonable at the same time to contact the working wall of the first chamber and the wall of the second chamber in contact with each other.

You can fill the first chamber with water, and the second with castor oil.

The problem is also solved by the implementation of the electrode orientation system for the described device, comprising a dielectric bracket, at the ends of which are installed with the possibility of extension with the electrodes in the direction to each other, and which is connected with a rotation mechanism configured to ensure the rotation of the bracket around the Y axis and mounted on a housing mounted on the base with the possibility of linear movement along the X axis and rotation about the X axis, and the base is made with the possibility of linear movement along the Y axes and Z.

In addition, for linear movement along the Y and Z axes, the base can be made in the form of a cross installed in the glass with the ability to move along the Z axis, and the glass is placed on the bed with the ability to move along it along the Y axis.

In this case, the bed can be equipped with wheels for installing it in any position relative to the table for the patient.

List of drawings

figure 1 shows a General diagram of a device for high-frequency therapy;

Fig. 3 is a general diagram of another embodiment of the same device with an applicator equipped with a second camera (conventionally with one electrode);

Fig. 4 is a general diagram of an embodiment of the device of Fig. 3, in which the cameras have a common wall (conventionally with one electrode);

Fig. 3 shows a high-frequency therapy device according to the invention, together with an electrode orientation system and a patient table.

Utility Model Examples

The proposed device for high-frequency therapy, depicted in figure 1, contains electrodes 1 made in the form of metal plates, included in the electrical load circuit of the generator 2 of the electric UHF field. The electrodes 1 are each equipped with an individual applicator 3 in the form of a chamber 4 having an elastic working wall 5 adapted to interact with the surface 6 of the patient’s body 7 and filled with a liquid dielectric 8.

The chamber 4 of each applicator 3 has the shape of a bellows in contact with one of its end walls with the surface of the plate of the electrode 1, while its second end wall 5 is working. Due to the elasticity of the bellows corrugation, the applicator adapts well to various curvatures of the surface 6 of body 7 over the entire area of its working wall 5, without creating uneven and excessive pressure, thereby increasing patient comfort during a painful procedure and ensuring high accuracy of heat localization in the depths of the body.

Each chamber 4 of the applicator 3 is connected through a pipe 9 to a means for supplying a liquid cooled dielectric 8 (not shown in the drawing, since it is not the subject of the invention), due to which heat is exchanged through an elastic working wall 5 between the liquid dielectric 8 and the surface 6 of the body 7 the patient.

electrode 1 with individual applicators 3, superimposed by their elastic working walls 5 on the surface 6 of the patient’s body, between which the body region 10 is located, in which the malignant tumor 11 is the object of hyperthermic exposure to the UHF electric field.

Figure 2 shows the proposed device in which the bellows is made with a cross-sectional area increasing towards the surface 6 of the body, which makes it possible to move the electrode 1, and, therefore, vary the field of influence of the field in the location of the tumor 11, without terminating the active phase of the procedure . Figure 2 shows two conditional positions of the electrode: "A - initial," B - final (dashed line).

The amplitude of movement of the electrode is determined by the number and elastic properties of the bellows corrugations, the ratio of the lengths of the perimeters of the walls of the bellows adjacent to the electrode 1 and to the body 7 of the patient, as well as the pressure of the dielectric 8 in the chamber 4 of the applicator 3.

In the particular case, the bellows is made in the form of a truncated cone, the larger base of which serves as an elastic working wall 5.

Fig. 3 shows the proposed device, in which the applicator 3 is provided with an additional chamber 12 of elastic material that contacts its wall 13 with the first chamber 4 on the surface of the working wall 5 and fastened with it around the entire perimeter of the working wall 5. The opposite wall 14 of the chamber 12 is adapted to interact with the surface 6 of the body 7 of the patient. The chamber 12 is filled with a viscous liquid dielectric 15, and the volume of the chamber 12 is selected taking into account the condition that when the distance between the opposite walls 13 and 14 of the chamber 12 in the direction of the electric UHF field strength lines (essentially perpendicular to the plane of the electrode plate 1) is “ 1 μm, cross-sectional area

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chamber 12 in a plane perpendicular to the direction of the lines of tension exceeds the area of the wall 5 of the chamber 4.

That is, the walls 13 and 14 of the elastic chamber 12 have a “margin for mutual movement with low friction, i.e. the slip provided by the presence of a thin layer of liquid dielectric 15.

In dynamics, the movement of the device is conditionally illustrated by two positions in Fig. C: "C - initial; “D is the final one (dashed line). The directions of movement of the pair of electrodes can be different both around the center and along mutually perpendicular axes of the tumor.

The elastic chamber 12 allows you to increase the ability to move the electrodes 1 on the surface of the body 7 with low friction without stopping the active phase of the procedure during hyperthermia of a malignant tumor 11 of a complex configuration and ensuring the accuracy of heat localization in a given area 10 of the patient’s body.

The amplitude of the movement of the electrodes in this case is determined by the parameters of the bellows and the camera 12.

Figure 4 shows the proposed device, in which the elastic working wall 5 of the applicator chamber 4 in contact with each other and the wall of the elastic chamber 12 interacting with it are made as a whole in the form of a common wall 16, which greatly simplifies the design of the applicator and reduces the resistance to heat flux.

As the material for the walls of the chamber 4 - the bellows and the chamber 12 with the lubricant, you can use rubber, as a liquid dielectric 8 - distilled water, and as a liquid lubricating dielectric 15 - castor oil with S 4,5-4,8, tg5 0 , 08, viscosity 2-10 m / s at Hz and at T 40 ° С.

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The invention is intended to hold the electrodes 1 on the patient’s body and to ensure the drift of the electrodes 1 according to the program during the irradiation procedure.

The orientation system (Fig. 5) is a device, the main executive body of which is a bracket 17. On the brackets the brackets 18 are mounted, with the possibility of extension, supporting electrodes 1. The bracket 17 is kinematically (for example, by gearing) connected to the rotation mechanism 19, providing it with a scanning rotational movement at the required angle around the Y axis. A bracket 17 with a rotation mechanism 19 is mounted in the housing 20 with the possibility of rotation around the X axis from the drive 23, which is a known mechanism, for example, a motor uktor. The housing 20, in turn, is installed on the base - the crosspiece 21, which provides it with the possibility of linear movement along the X axis from the drive 22, which is, for example, a known screw-nut pair. The spider 21 is installed in a cup 24, which is a guide for the spider 21 and provides it with linear directional movement along the Z axis from the drive 25, which is analogous to the drive 22. The cup 24 can be moved on rollers along the frame 26 along the Y axis. The entire orientation system is mounted on the frame 26 equipped with wheels 27, which allows you to transport it, and also, if necessary, change its position relative to the table 28 for the patient.

The electrodes 1 by means of cables passing through the arms 18 are connected to a high-frequency generator (not shown in Fig.), In addition, the cameras 4 of the applicators 3 are connected by elastic pipes (not shown) to the refrigerant circulation system - a liquid dielectric.

The patient is placed on the table 32 (Fig. 5) and the electrodes 1 are set using the orientation system in which the region 10 (Fig. 1) of the patient’s body 7 with a malignant tumor 11 is between the electrodes 1, that is, in the volume of the electric field of the capacitor . Through the nozzles 9 of the chamber 4 of the individual applicators 3 are filled with dielectric fluid 8 and create excess pressure until the elastic working walls 5 are snug against the surface 6 of the patient’s body 7.

As dielectric fluid 8, purified water is usually used. Under the pressure of the liquid 8, the elastic working wall 5 takes the form of the surface 6 of the body 7, and the bellows along the perimeter of contact with the surface 6 due to the flexibility and elasticity of the corrugations follows the curvature of the body 7 of the patient with uniformly distributed pressure, thereby without painful and uncomfortable deformation of the body 7 the patient. The circulation of heat between the surface 6 of the body 7 and the dielectric fluid 8 through the working wall 5 is set using circulation.

Turn on the UHF electric current oscillation generator 2 for matching with nafuzu (tuning the resonant load circuit with a capacitor in the form of electrodes 1 with applicators 3 and region 10 of the patient’s body 7 in the interelectrode space). The generator power given to the load is increased with temperature control in the tumor 11. For a specified time interval (30130 min.), The active hyperthermic regime in the tumor 11 is maintained, providing the required heating level (43-45 ° С) throughout its volume. At the end of the active phase, the hyperthermia procedures reduce the power and turn off the UHF generator 2, remove the excess pressure of the dielectric fluid 8 in the chambers 4 of the applicators 3 and remove the electrodes 1 from zone 10 of the patient’s body 7.

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malignant tumors and chronic pathological foci.

The action of the proposed device in the embodiment of FIG. 2 differs from the above in that the bellows is made with the perimeter increasing towards the surface 6 of the patient’s body 7, for example, in the form of a truncated cone with a large base, which is an elastic working wall 5, due to deformation of the elastic corrugations and under the working pressure of the dielectric fluid 8 in the chamber 4 of the applicator 3 without stopping the active phase of the hyperthermic procedure allows you to move the electrode 1.

This movement of one or more electrodes makes it possible to increase the accuracy of heat localization in the tumor 11, changing the relative geometric position of zone 10 in the body 7, while increasing the efficiency of the hyperthermic procedure due to more complete overheating of the tumor.

The action of the proposed device in the embodiment of FIG. 3 differs from that described in FIG. 1 in that the applicator 3 is provided with an additional elastic chamber 12, one wall 13 of which is in contact with the working elastic wall 5 of the chamber 4 of the applicator 3, and the other wall 14 is in contact with surface 6 of the body 7 of the patient. Since the volume of the chamber 12 is filled with a viscous lubricant 15 and the chamber 12 extends beyond the outer contour of the working wall 5 of the chamber 4 of the applicator 3, that is, it has a “reserve, the movement of the electrode 1 occurs with little friction and becomes possible without terminating the active phase of the hyperthermic procedure (see . "US and" 10D).

The range of movement of the electrodes 1 of the proposed embodiment of the device is determined by the number and flexibility of the bellows corrugations at the working pressure of the dielectric fluid 8 in the chamber 3 of the applicator 4 and the size of the margin for the mutual movement of the walls 13 and 14 of the additional elastic chamber 12.

the execution of FIG. 4 is not given, since in principle it does not differ from its action in the embodiment of FIG. It differs only in the design form of the applicator 3, in which the elastic wall of the chamber 4 of the applicator 3 in contact with each other and the wall of the additional elastic chamber 12 are made as a single unit in the form of a common wall 16. Such a design of the applicator 3 allows to simplify its design and reduce heat resistance between surface 6 of the patient’s body 7 and dielectric fluid 8 in the chamber 4 of the applicator 3.

Thus, the new features in the proposed device can achieve high adaptability to different parts of the patient’s curvature and elasticity, improve patient comfort during a painful procedure, move the electrodes without interrupting the treatment procedure, accurately localizing heat in a given area of the body, which increases the effectiveness of treatment and device utilization.

Utility Model Efficiency

The device for high-frequency therapy and the electrode orientation system, made in accordance with the present invention, allow to achieve high adaptability to a diverse surface relief of the patient’s body, to ensure continuity of the active phase of the treatment procedure when moving the electrodes, to eliminate the formation of gaps between the patient’s body and the applicator, due to which, most importantly, to achieve the required accuracy of heat localization inside the body, as well as to increase the utilization rate of the device, improve comfort patient during the procedure and exclude overheating of healthy tissue sites.

Claims (9)

1. Device for high-frequency therapy, comprising a generator of an electric UHF field and at least two electrodes connected to it, each equipped with an applicator made in the form of a chamber filled with a liquid dielectric, having one of its walls in contact with the electrode and having an elastic working wall, characterized in that the chamber of at least one applicator is made in the form of a bellows, one end wall of which is in contact with the electrode, and its second end wall is working.  2. The device according to claim 1, characterized in that the bellows has a cross section increasing towards the working wall.  3. The device according to claim 1 or 2, characterized in that the bellows is made of elastic material.  4. The device according to any one of claims 1 to 3, characterized in that each applicator, made in the form of a bellows, is additionally equipped with a second chamber of elastic material in contact with said first chamber on the surface of its working wall and filled with a liquid dielectric, the volume being the second camera is selected taking into account the fulfillment of the condition that in a position where the distance between the opposite walls of the second camera in the direction of the electric UHF field intensity lines ensures their sliding relative to each other, the area with cheniya second chamber in a plane perpendicular to the direction line tension exceeds the working area of the wall of the first chamber.  5. The device according to claim 4, characterized in that the working wall of the first chamber in contact with each other and the wall of the second chamber are made integrally.  6. The device according to claim 4 or 5, characterized in that distilled water is used as the liquid dielectric for the first chamber, and castor oil is used for the second chamber.  7. The orientation system of the electrodes for the high-frequency therapy device, containing a bracket, at the ends of which are mounted with the possibility of extension in the direction of each other rods with electrodes and which is connected with a rotation mechanism made with the possibility of rotation of the bracket around the Y axis and connected with the housing installed based on the possibility of linear movement along the X axis and rotation around the X axis, and the base is made with the possibility of linear movement along the axes Y and Z.  8. The system according to claim 7, characterized in that for linear movement along the Y and Z axes, the base is made in the form of a cross installed in the glass with the ability to move along the Z axis, and the glass is placed on the bed with the ability to move along it along the Y axis. 9. The system of claim 8, characterized in that the frame is equipped with wheels for installing it in any position relative to the table for the patient.