RU2473318C2 - Device of plasma tissue coagulation - Google Patents

Abstract

FIELD: medicine.

SUBSTANCE: invention relates to field of medicine and medical equipment, in particular, to devices, used for non-contact coagulation of proteins of blood and wound surface tissues. Device transforms power source energy into high-frequency electromagnetic energy by means of plasma-generating electrode onto processed surface. Device contains LC contour with outlet from middle point. As inductance used is inductance coil with core or without it. As capacity used is coaxial cable, whose internal wire is connected with inductance by one end, the other end being high-voltage outlet, to which current-setting resistor with plasma-generating electrode. External wire of cable is connected with high-frequency generator.

EFFECT: application of invention will make it possible to reduce impact on electromagnetic irradiation operator and eliminate devices that are heated in the process of work in operator's hand.

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Description

The invention relates to the field of medicine and veterinary medicine, in particular to methods and devices used for non-contact coagulation of blood proteins and tissues of the wound surface.

A known method and device for plasma coagulation (RF patent No. 2261682, bull. No. 28, C2) by converting the energy of the power source into high-frequency electromagnetic energy in the high-frequency AC voltage converter, increasing its potential in a high-frequency transformer and transmitting electromagnetic energy in the form of plasma through a plasma needle electrode on the surface to be treated, while increasing the potential of high-frequency electromagnetic energy in a high-frequency transformer wire t at its resonance frequency, with the formation of standing current and voltage waves in it, phase-shifted by a quarter of the phase, and the creation of a high-frequency transformer connected to the plasma-forming electrode at the output of the high-voltage winding, a voltage antinode transmitted to the plasma-forming needle electrode introduced inside flasks made of a transparent dielectric, for example quartz, filled with metal vapor. A plasma glowing in the optical and ultraviolet ranges is formed in the flask with the transmission of the voltage of the high-frequency transformer to the flask shell, with the possibility of forming a cold plasma between the outer side of the flask and the treated surface of the working plume.

A known device for plasma coagulation includes a power source, a high-frequency AC voltage converter with an adjustable frequency, and a high-frequency transformer containing a low-voltage and high-voltage winding, while the outputs of the low-voltage winding are connected to the high-frequency AC voltage converter, one terminal of the high-voltage winding is connected to a needle plasma-forming electrode, and the second - isolated. A plasma-forming electrode is inserted inside a flask filled with metal vapor and made of a transparent dielectric, for example quartz, in the form of a cone or sphere. The plasma-forming electrode may also contain an LED. The use of the invention allows to increase the effectiveness of treatment by stabilizing the plasma torch, increasing its controllability, which increases the accuracy of surface treatment of the wound.

The disadvantage of this device is that the operator must hold in his hand a high-voltage, high-frequency transformer, which in addition to having a certain weight, also heats up during operation. As a result, the operator has in his hand a device that not only heats up, but also emits a harmful electromagnetic field.

Known plasma generator for radiosurgery (patent US 6958063 B1). In this invention, the plasma generator is equipped with a tunable high-frequency generator, in which the frequency is determined by the resonant frequency of the resonant transformer. The plasma current is limited by a capacitor located in the handle of the plasma head.

The disadvantage of this device is that to create a plasma it is necessary to produce a resonant transformer having at least two windings.

Closest to the technical nature of the present invention is a HIGH-FREQUENCY PLASMA GENERATOR, in which the plasma generator contains a plasma-forming electrode connected to an oscillating circuit, a generator lamp, capacitors, an RLC circuit inductor and a high-voltage direct current source. The generator lamp grid is connected to a grounded cathode through an RLC circuit. The electrode is connected to the inductance of the central residential triaxial cable, in which the inner shield is connected to the external grounded shield through a capacitance. The resistance in the mesh circuit is adjustable in magnitude. The connection point of the oscillatory circuit with the grid inductance is connected to the cathode through the capacitance (RF Patent No. 2035130 C1, 05/10/1995).

The disadvantage of this device is the need for a triaxial cable and the absence of a current limiter for the plasma head.

The objective of the invention is to simplify the design, reduce the impact on the operator of electromagnetic radiation and the exclusion of heating devices during operation in the hand.

The above technical result is achieved by the fact that the proposed device for plasma coagulation of tissues by converting the energy of the power source into high-frequency electromagnetic energy by means of a plasma-forming electrode on the surface to be treated, including the power source and high-frequency generator, contains an LC circuit with output from a midpoint where a coil is used as an inductance inductance with or without a core, and a coaxial cable, internal the wire of which is connected at one end to an inductance, and the other end is a high-voltage output, to which a current-sensing capacitor with a plasma-forming electrode is connected, and the external cable wire is connected to a high-frequency generator and is a screen from radiation.

The essence of the proposed plasma coagulation device is illustrated in the figure, which shows a general diagram of a device with an LC circuit, which includes a coaxial cable as a container.

The device contains a power source 1, a high-frequency generator 2, an inductor 3, a midpoint of circuit 4, a coaxial cable 5, an external wire of a coaxial cable 6, a plasma-forming head housing 7, a current-collecting capacitor 8 with a plasma-forming electrode 9.

The device operates as follows: from the power source 1, the voltage is supplied to the high-frequency generator 2, to which the inductor 3 is connected with one output, the inductance coil is connected to the internal wire of the coaxial cable 4 with the second output. which is connected to the plasma-forming electrode 9 by a second terminal, a part of the coaxial cable, a capacitor 8 and a part of the plasma-generating electrode are placed in the housing 7.

The resonance frequency of the plasma tissue coagulation device is 10 ... 150 kHz, and the voltage on the plasma-forming electrode is 1.5 ... 15 kV.

Claims (1)

A device for plasma coagulation of tissues by converting the energy of a power source into high-frequency electromagnetic energy by means of a plasma-forming electrode on a surface to be treated, including a power source and a high-frequency generator, characterized in that it contains an LC circuit with output from a midpoint where a core inductor is used as an inductance with or without it, and as a capacitance, a coaxial cable is used, the inner wire of which is connected at one end to an inductance vnostyu and the other end is the high-voltage output connected to the capacitor voltage driving plasma forming electrode, wherein the outer cable wire is connected to a high frequency generator.

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