IMPACT OF NON-CONTACT ELECTROMAGNETIC RADIATION ON LIVING ORGANS AND TISSUES

Abstract

This study aims to create a laboratory unit for induction heating and assess how possible it is to use local induction heating in solving problems related to biotechnology and medicine. This article contains a description of a method for non-contact local hyperthermal heating of biological tissues using inductive electromagnetic radiation. The method is based on the introduction of a composite material consisting of a polymer base and incorporated ferromagnetic particles into living tissues. The authors present a simplified mathematical model of physical processes occurring during the heating of a polymer sample-implant. The results of mathematical modeling are further used to approximate the data obtained in experiments on a specially built laboratory unit. The materials for building the applicator included a mixture of a plastic polymer and a hardener. The plastic polymer was modified by adding finely dispersed ferromagnetic particles and thoroughly mixed. Since the further use of the polymer applicator will occur in the field of biotechnology and medicine, the material for the manufacture of the applicator was Speedex putty silicone impression mass. The authors have calculated the physical parameters of the simplest model of the heated applicator. The nature of the dependence of the efficiency of induction heat release has been established. An increase in the efficiency of induction heating with an increase in the size of electrically conductive particles has been proven. Another series of experiments has been organized with double power consumption. The authors see the prospect of further development of studies in the chosen area in the development and creation of an automated control system and long-term maintenance of the temperature of heated samples at the target level. To do this, it is necessary to compare various methods for controlling the thermal power: control of the duty cycle of the master oscillator pulses, frequency shift near the resonant frequency, periodic on/off switching of the master oscillator, etc. Besides, it is necessary to develop a technique and technology for monitoring the uniformity of the sample temperature, which is especially important due to the complexity of using conductors in the induction heating zone. Finally, an important task for further studies is the development of different inductors for different applications. The authors assume that an open external inductor with a ferrite core may become the most probable model.