S.V. Alkov - Ph. D. (Eng.), Associate Professor, Department of Medical Engineering Information Technology (BMT-2), Bauman Moscow State Technical University. E-mail: alkov@bmstu.ru Yu.A. Ershov - Dr. Sc. (Chem.), Professor, Department of Medical Engineering Information Technology (BMT-2), Bauman Moscow State Technical University. E-mail: ershov_54@mail.ru S.P. Skvortsov - Ph. D. (Eng.), Assiciate Professor, Department of Biomedical Technical Systems (BMT-1), Bauman Moscow State Technical University. E-mail: bmt203@yandex.ru

Today cardiovascular diseases - the main reason for disability and premature death of residents of economically developed countries. Heart attacks and strokes occur mainly as a result of blood clots in the blood vessels that hinder the flow of blood to the heart and brain. To reduce the risk of death is necessary to increase the lumen of the occluded vessel and to restore a blood-groove. Modern methods of ultrasonic angiosurgery, along with methods of ultrasonic therapy and sterilization are based on application of low-frequency ultrasound in the range of 20-100 kHz. The shortcoming of the existing devices of ultrasonic surgery of vessels, is lack the continuous control of acoustic power and, in particular, of amplitude of mechanical oscillations. Therefore one of the purposes of researches was creation of the block biotechnical system of formation of the ultrasonic signal providing fine tuning of amplitude and frequency depending on fabric parameters with control of parameters of influence. Ultrasonic destruction of blood clots in this system is made by the special surgical tools entered into a gleam of vessel and the making longitudinal and cross fluctuations with a frequency from 20 to 40 kHz and amplitude on the working end of tool from 20 to 100 microns. The physical model consists in increase in a gleam of a vessel by ultrasonic tool without removal of the atherosclerotic hearth. The hardware-software complex is developed for this method of surgery. The feature of this unit is the presence of feedback unit for ultrasonic radiation intensity and the quality of operational procedures. Improvement of quality of operation control of ultrasonic unit is means continuous measurement of parameters of influence, visualization and possibility of their change. It should be noted that the block of feedback demands completion. For the functioning of all developed system, is necessary to provide interface of the acoustic tool and optical part of the infrared sensor. Improvement of the block of calculation of parameters of biofabric, and also study of block diagram of the device is the cornerstone of further development of work.

 

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