Cybernetics and Computer Engineering, 2021, 3(205)
Senior Teacher of the Biomedical Engineering Department
SHLYKOV V.V.1, DSc (Engineering), Associate Professor,
Нead of the Biomedical Engineering Department
DUBKO A.G.2, PhD (Engineering), Associate Professor,
Researcher of Department of Welding and Related
Technologies in Medicine and Ecology
1National Technical University of Ukraine “Igor Sikorsky Kyiv Polytechnic Institute” 37, . Peremogy av., Kyiv, 03056, Ukraine
2 “E.O. Paton Electric Welding Institute” 11, Kazimir Malevich str., Kyiv, 03150, Ukraine
DETERMINATION OF PARAMETERS OF INFLUENCE OF HIGH FREQUENCY CURRENT ON LIVING TISSUES
Introduction. High-frequency electric welding of biological tissues is an effective method of treatment in surgery. This is an electrosurgical method that minimizes the possibility of the destructive effect of electric current on soft living tissues. The welding method is widely used in general surgery for joining soft tissues where a weld is created when a high frequency electric current is passed through the tissue. With this method, it is possible to carry out serious operations, such as welding of liver tissue, retina, resection of tumor tissue and many other operations. For operations in surgery, it is important to know the optimal parameters of HF- welding, such as welding temperature, mechanical stress on tissues, welding time and voltage.
The purpose of the article is to determinate the optimal conditions for high-frequency welding of living tissues, such as welding temperature, mechanical stress on tissues, welding time and voltage. To determine these parameters, the liver tissue fusion was simulated in the Sinda and Comsol software.
Results. As a result of modeling and research, model dependencies were obtained that determine the optimal parameters of high-frequency welding for performing surgical operations for resection and welding of liver tissue. In the place of direct contact of the electrodes with the tissue, the temperature does not exceed +70 ° C, and at a distance of 2 mm in the adjacent tissues does not exceed +50 °C, which provides a tissue-preserving electrosurgical effect.
Conclusions. The studies have shown that mathematical modeling of heating biological tissue by a split electrode, through which a high-frequency current passes, practically coincides with a real experiment. The optimal conditions for high-frequency welding of living tissues obtained as a result of modeling, such as welding temperature and welding time make it possible to reduce the recovery period after applying the HF-welding method by choosing the optimal coagulation modes.
Keywords: welding of biological tissues, mathematical modeling, temperature, liver, surgery, modeling in Sinda, modeling in Comsol
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