A high-frequency electromagnetic system for biological tissues destruction

Abstract

The possibility of using an impacting electromagnetic radiation in the high-frequency range for ablation of biological tissues (soft and high density) is considered. A comparative analysis of the characteristics of ablation performed using electromagnetic radiation of the microwave range (microwave ablation method (MWA)) and high-frequency (HF) range is given. It was experimentally revealed that the characteristics of ablation performed by both methods are close to each other. HF ablation techniques performed by non-invasive and invasive methods are proposed and experimentally tested. Laser control of the degree of destruction of biological tissue is proposed which increases the reliability of control. The experiments were carried out using a high-frequency generator at a fixed frequency of 13.56 MHz created with the participation of the authors of this work. The use of an HF generator provided an effect on a biological tissue with a needle-type emitter (medical steel), without using a closed electrical circuit. Pig skin and muscles of cattle were used as biopsies. The processes of burning out the object of exposure, resection and coagulation were performed. It is shown that with HF ablation (HF), the tissue is heated to 120 ° C. A multimeter with the function of a thermal imager CEM DT-898 manufactured in Germany was used to study the temperature in the focus of exposure. This multimeter allows capturinge the area with the maximum temperature at the place of discharge, which occurs when the emitter approaches the skin and heats the skin to a certain temperature, as a result of which thermal ablation occurs. It was revealed that HF ablation occurs practically without affecting the surrounding tissues. A high-frequency electromagnetic system for conducting experimental studies has been developed and implemented. Based on the results of the work, it is proposed to ablate biological tissue using Russian HF generators.