RU2058164C1 - Device for microwave therapy - Google Patents

Abstract

FIELD: medical equipment. SUBSTANCE: device has frequency multiplier (multiplication ratio is equal to 30) and irradiator. Both are disposed inside removable withdrawal head, which is connected with stationary unit. The unit has power supply and microwave generator. Microwave units are introduced into the device, which units provide checking of parameters, amplitude modulation modes and annular polarization as well. EFFECT: improved therapeutic effect. 6 cl, 1 dwg

Description

 The invention relates to medical equipment, in particular to devices for reflexology, designed for non-contact effects on reflexogenic active zones and biologically active points with electromagnetic radiation of the microwave range, in particular EHF radiation of non-thermal intensity, in the wavelengths of the EHF range corresponds to the millimeter range.

 A device is known for microwave irradiation of reflexogenic zones [1] comprising a stationary power supply and control unit and antenna applicators connected to it by flexible cables with centimeter wave generators located at them operating at a frequency of about 10 GHz.

 This device has the following disadvantages: irradiation of patients is carried out in the centimeter wavelength range, while it is known that exposure to the EHF band is most effective; despite the fact that there is a set of interchangeable antenna applicators, the covered operating frequency range is limited to almost 1.25 GHz (from 9.5 to 10.75), while the resonant frequencies at which the therapeutic effect is observed are currently known; the need to use a separate generator for each operating frequency.

The closest technical solution for the technical nature and the achieved result, selected for the prototype, is the installation [2]
Working with a complex of these two units (Yav-1-5.6 and Yav-1-7.1) allows you to expand the range of resonant treatment frequencies and irradiate two sets of reflexogenic zones, thereby improving the therapeutic effect.

 The installation of EHF-therapy "Yav-1" contains a microwave generator, a power supply unit, an irradiator of the microwave range of wavelengths, facing the irradiated region of the body. The microwave wavelength generator is made on a millimeter avalanche-span diode (LPD) with varactor frequency tuning and is placed together with the power supply in a housing mounted on a bracket in the immediate vicinity of the patient.

 The disadvantages of the "Yav-1" installation are the need to use a complex of two devices to increase the therapeutic effect by expanding the applicable wavelength range, the difficulty of maintaining the installation due to the rigid connection of its stationary unit with a microwave irradiator, which leads to inconvenience of irradiation of various areas of the body, and manual periodic monitoring of functioning, as well as the absence of modes with amplitude-modulated and polarized signal.

 The aim of the invention is to increase the impact due to the use of expanding the wavelength range.

 The goal is achieved by the fact that the device for microwave therapy, containing a power supply in series, a microwave wavelength generator, a microwave wavelength irradiator, includes a frequency multiplier, the input of which is connected to the output of the specified generator, and the output to the input of the irradiator, moreover, the multiplier is rigidly connected with the irradiator.

 In addition, multipliers with a high multiplication factor of up to 30 are used for the same purpose.

 In order to simplify maintenance, the power supply and the microwave wavelength generator are placed in a stationary housing, and the multiplier and irradiator are in a removable removable head connected to the stationary block by a cable.

 In order to ensure a given exposure mode, a microwave coupler, a band-pass filter, an incident power detector, and a device automatic switch circuit connected to the generator output are introduced in series with each other, and the coupler is connected between the generator and the multiplier.

 In order to use the amplitude-modulated irradiation mode, an electrically controlled attenuator connected to the input of the generator and the output to the input of the multiplier is introduced into the device.

 In addition, a circular microwave polarizer is installed at the output of the multiplier.

 The drawing shows a diagram of a microwave therapy device.

 The device consists of a stationary unit 1, including a power supply unit 2 and a microwave generator 3 connected in series, a remote head 4, including a frequency multiplier 5 and an irradiator 6 of the microwave wavelength range and connected to the output of the generator 3 in the stationary unit 1 via cable 7.

 To improve the therapeutic effect, a microwave electric controlled attenuator 8, a circular microwave polarizer 9 installed at the output of the irradiator can be introduced into the circuit.

 To simplify maintenance, a coupler 10 of the microwave wavelength range, a band-pass filter 11, an incident power detector 12, an automatic device shutdown circuit 13, the output of which is connected to the input of the power supply unit 2, can be introduced in series with each other.

 The operation of the device is as follows.

 After the remote head 4 is directed to the excited body area in the device, the generator 3 is turned on, the microwave signal via cable 7 enters the remote head 4, is multiplied by the multiplier 5 and, through the irradiator 6, reaches a predetermined area of the body. When using an electrically controlled attenuator 8 in the circuit, the microwave signal at the irradiator output will be amplitude-modulated, as well as when using a circular microwave polarizer, the signal will be polarized.

 If during operation the microwave signal changes its parameters in power or frequency and at the same time they go beyond the specified limits, the signal received through the coupler 10 and the pass-pass filter 11 to the incident power detector 12 will differ from the signal according to which the circuit 13 of automatic turning off the device generates a signal that supports the device in operation, and the device will automatically turn off.

 The proposed technical solution allows, within the framework of one device, to significantly increase the therapeutic effect through the use of an extended wavelength range (over 20 operating frequencies). Moreover, this is not achieved through the use of a microwave generator in a relatively narrow frequency range (for example, from 6 to 7 GHz), followed by multiplication of the generation signal by multipliers of fixed multiplicity (up to 30). Due to this, even a single generator using a certain number of multipliers (up to 30) can provide irradiation, for example, at frequencies of the millimeter wave range corresponding to the number of multipliers of any multiplicity up to 30. Moreover, the implementation of the device can be based on one type of transistor and varactor and several types of multiplier diodes, overlapping due to the multiplicity of up to 30 the entire required frequency range of the generation.

 At the same time, the millimeter units used in this device do not contain high-quality contours, therefore, they do not require high-precision machining.

 Simplification of service and ease of operation are also achieved by the fact that the proposed design allows the stationary unit to be placed on the operator’s desktop, and irradiation of the required area of the patient’s body is ensured by the use of interchangeable heads connected to the stationary unit with a flexible cable of sufficient length, which makes it possible to irradiate almost anywhere in the body patient without moving the stationary unit.

 The use in the base unit of microwave circuits of generation and automated control of power and frequency simplifies the design of the device and reduces its cost due to the use of simpler technologies characteristic of lower wavelength ranges.

 In general, the design of the device on the basis of the proposed solution ensures its operability with minimal operator skills, provides the convenience of working with medical personnel.

 In the immediate vicinity of the patient, only a replaceable head is located. The absence of voltages above 30 V significantly increases the electrical safety of the patient, in contrast to the prototype design, which as a whole (with mains voltage) is located in close proximity to the irradiation zone of the patient's body.

 Introduction at the generator output of a microwave electrically controlled attenuator allows you to increase the therapeutic effect by creating an amplitude-modulated radiation regime. The use of an attenuator in the lower frequency range greatly simplifies the implementation of the amplitude-modulated exposure mode.

Claims (6)

 1. A device for microwave therapy containing a serially connected power supply unit, a microwave wavelength range generator and an irradiator, characterized in that, in order to increase the efficiency of the effect by expanding the wavelength range, a multiplier is inserted into it, included between the microwave range generator and the irradiator with which it is connected by a hard link.  2. The device according to claim 1, characterized in that the multiplier is made with a high multiplication factor up to 30.  3. The device according to claims 1 and 2, characterized in that, in order to simplify maintenance, the power supply unit and the microwave wavelength generator are located in the stationary unit, and the multiplier and irradiator in a portable removable head connected to the stationary unit by cable.  4. The device according to claims 1 and 2, characterized in that, in order to ensure a given exposure mode, a microwave coupler of a wavelength range, a band-pass filter, a falling power detector and an automatic shutdown circuit of the device, the output of which is connected, are introduced into it to the input of the power supply, while the power coupler is connected between the output of the microwave wavelength generator and the input of the multiplier.  5. The device according to claims 1 to 4, characterized in that, in order to use the amplitude-modulated irradiation mode, a controlled attenuator is introduced into it, the input connected to the output of the generator, and the output with the input of the multiplier.  6. The device according to PP.1 to 5, characterized in that it introduced a circular polarizer installed at the output of the irradiator.

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