DEVICE FOR TREATING TUMORS Russian patent published in 1998 - IPC

FIELD: medical engineering. SUBSTANCE: device has controllable high frequency oscillator bound to radiator which thermal electrode is built into catheter having also a temperature pickup inside and control unit which output is connected to corresponding input of the controllable high frequency oscillator and control desk with timer. Display unit has temperature indicator coupled with temperature pickup. The temperature indicator output is connected to corresponding input of the control unit. The device has reflectometer, and the controllable high frequency oscillator is made from high frequency oscillator, modulator, attenuator and power amplifier. Radiator has adjustment circuit with controllable member. Control unit has pulse-width modulator, means for changing the level of output signal and adjustment unit. The pulse-width modulator is connected to temperature indicator and modulator, control desk, timer, temperature indicator and adjustment unit. Corresponding outputs of the means for changing the level of output signal are connected to control input of attenuator and the first input of adjustment unit. Its inputs are connected to reflectometer output which signal is in proportional relation to incident wave magnitude, and the first input of the adjustment unit. Its second output is connected to controllable member of adjustment circuit. The third output is connected to control input of the pulse-width modulator. Control desk output is connected to the second input of the adjustment unit. Reflectometer output is connected to the third one, its signal being in proportional relation to the value of wave reflected from body area. The thermal electrode is composed of frame radiators, plane of each of which is radially directed with respect to longitudinal catheter axis so that one of longitudinal sides of each frame radiator in parallel to the mentioned axis. EFFECT: uniform distribution of radiation over a body area corresponding to load and selected program; permanent control of high frequency oscillator signal. 4 cl, 1 dwg