RU1819635C - Device for shf-therapy - Google Patents

Abstract

Usage: in medical technology, namely in microwave therapy devices used to treat diseases of the urethra and prostate gland. SUMMARY OF THE INVENTION: the device contains two internal cavity electrodes, one of which is inserted into the urethra and the other into the ampoule of the rectum, with microwave power supplied from the generator to the power divider, in the microwave power paths between the divider and variable attenuators are turned on by the emitters, and a phase shifter in one of the paths. 1 ill. IV Ј 00 Yu DS s s

Description

The invention relates to medical equipment, in particular to microwave equipment used to treat diseases of the urethra and prostate gland.

In order to influence the entire volume of the prostate, control the structure of the electromagnetic field, and therefore the distribution of heat generation in the gland space, it is proposed to produce two cavity microwave emitters inserted: one emitter into the rectal ampoule, the second into the urethral cavity. In this case, microwave power is supplied from the generator to the power divider, variable attenuators are included in the microwave power paths between the divider and emitters, and a phase shifter is in one of the paths. This allows you to adjust the power emitted

each emitter and distribute the phases of the microwave fields summarizing in the prostate. It is known that the sum of two fields with the same frequencies and having an amplitude EI e | Eil e1 and 1Eg1 IE2J e1 (the field is conveniently expressed in complex form) gives an expression for the heat generation P at the considered volume point:

P | aMEil2-K + + 2I Ei 1 I EgI cosfy i),

where o is the conductivity of the medium; p, tpz are the phases of the radiated fields.

Thus, by changing .lEil, .. IE2l and the phase (- /%}, the maximum heat generation in a given volume can be shifted. The heat generation structures in a flat muscle layer are shown when it is irradiated from two directions in-phase, with the same amplitudes and frequency waves. Thus By adjusting the phase and amplitude of the waves, it is possible to control the heating of the region between the radiators.

The drawing shows a structural diagram of the device.

The numbers indicate: 1 - microwave power generator; 2 - microwave power divider; 3, 4 - attenuators; 5 - phase shifter, b, 7-microwave oven emitters; 8 - coaxial cable; 9 - temperature meter.

The microwave oscillator 1 is connected by a coaxial cable 8 with a power divider 2, with a power divider two coaxial cables go to attenuators 3 and 4, an intracavity emitter 6 is connected to one of the attenuators, an attenuator 4 is connected to a phase shifter by cable 8 5, the phase shifter 5 is connected via a cable to the intracavitary radiator.

The power from the generator 1 is transmitted through a coaxial cable to a power divider 2, where it is divided in a ratio of 1: 1, then two cables are supplied to the attenuators 3 and 4, from the attenuator 3 through the cable to the emitter 6, for example, to the penis urethra; From the attenuator 4, the microwave power is supplied to the phase shifter 5, then through the cable to the emitter 7 is inserted, respectively, into the ampoule of the rectum. The microwave power emitted by emitters b and 7 is summed up in the prostate gland. Temperature control is carried out by temperature meter 9.

In the installation, the Luch-3 physiotherapeutic apparatus was used as a generator, generating microwave power with a frequency of 2450 MHz and having a maximum output power of 20 W. A transition to an asymmetrical strip line is connected to the output connector of the generator. Since power divider, attenuators,

the phase shifter is made in strip design. The power divider is an annular bridge with outputs a quarter spaced from the input. The attenuator is made on a segment of an asymmetric strip line to the conductor of which is supplied, if necessary, to increase the attenuation, absorbing material (aquadag), mounted on a micrometer screw. Phase shifter

made on a segment of a strip line to the surface of which a diamond-shaped dielectric (Teflon) is supplied. At the inputs and outputs of the power divider, attenuators and phase shifter, transitions from an asymmetric strip line to a coaxial cable are installed. Elements of the microwave path are connected by pieces of coaxial cable. Intracavitary microwave emitters used to create tumor hyperthermia were used as emitters; the temperature was measured using the temperature measuring unit of the Yacht-5 hyperthermia unit (5, b). Intracavitary emitters also

included with this unit.

Microwave therapy procedures are performed with a power generated of 1015 watts. If necessary (temperature 41dC and above, unpleasant sensations in

rectum or urethra) in the appropriate microwave tract. additional power absorption is introduced by an attenuator. During the treatment session, if necessary,

the maximum heat generation can be shifted by changing the phase of the microwave power using a phase shifter.

A device for microwave therapy comprising a microwave generator, a temperature measuring unit, and an emitter made in the form of an intracavitary probe, as a whole - with the aim that, with the aim of increasing the effectiveness of crying due to the simultaneous

providing therapeutic effect on the entire volume of the prostate gland, serially connected power divider, attenuator, phase shifter and second emitter are introduced into it, made in the form

. cantilever probe, as well as a second attenuator connected between the first emitter and the second output of the power divider, the input of which is connected to the output of the microwave generator.

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Compiled by A. Gladky / Editor S. Kulakova Techred M. Morgenthal Corrector. Keretsman

Order 1994Pedys

VNIIIPI of the State Committee for Inventions and Discover at the State Committee for Science and Technology of the USSR 113035, Moscow, Zh-35, Rauska nab .. 4/5

Production and Publishing Plant Patent,. Uzhhorod, 101 Gagarina St.