RESEARCH OF THE PROPERTIES OF COMPRESSED SOFT BIOLOGICAL TISSUES DURING HIGH-FREQUENCY WELDING
ДОСЛІДЖЕННЯ ВЛАСТИВОСТЕЙ СТИСНУТИХ М’ЯКИХ БІОЛОГІЧНИХ ТКАНИН ПРИ ВИСОКОЧАСТОТНОМУ ЗВАРЮВАННІ
| dc.creator | Соловйов, В. Г. | |
| dc.creator | Ланкін, Ю. М. | |
| dc.creator | Романова , І. Ю. | |
| dc.date | 2025-02-12 | |
| dc.date.accessioned | 2026-06-05T11:09:44Z | |
| dc.date.available | 2026-06-05T11:09:44Z | |
| dc.identifier | https://ojs.tdmu.edu.ua/index.php/here/article/view/14889 | |
| dc.identifier | 10.11603/mie.1996-1960.2024.1-2.14889 | |
| dc.identifier.uri | https://repository.tdmu.edu.ua//handle/123456789/19085 | |
| dc.description | Background. By means of physical and mathematical modeling to investigate the change in elec- trical and thermophysical properties of soft biological tissues during their compression for a more detailed study of the mechanism of high-frequency welding of such tissues.Materials and methods. Research was conducted on the tissues of pig and calf internal organs, taken no later than three and twelve hours, respectively, after slaughtering the animals. Prior to research, organs were stored at a temperature of +50 C. The following were research: aorta, small intestines, heart muscle, pancreas, liver, lungs.Results. A custom-made dual-frequency bioimpedance analyzer was created for the research. Multiphysical modeling of electrical and thermal processes during welding of the soft biological tis- sues was carried out. The modeling studied the heat distribution with changes in the geometry of the model, which are related to changes in the thickness of the soft biological tissues or the distance between the clamping electrodes. The dynamics of changes in electrical parameters and tempera- ture over time were studied. An analysis of the influence of the power source frequency and heating temperature on the impedance of the model was performed. Conclusions. The main consequence of compression by the electrodes of electrosurgical instru- ments during bipolar high-frequency welding is a significant reduction in tissue thickness even before the electric heating current flows through them. At the pressure levels of the electrodes used during welding, the thickness of fabrics decreases by 5...15 or more times. Further reduction in the thick- ness of the fabrics as a result of their heating by the welding current is much lower and is no more than 10...20 % of the thickness of the fabric at the beginning of its heating. Dehydration of tissues leads to a significant change in their electrophysical properties. Compression of fabrics primarily significantly changes their electrical and thermal conductivity. Comparing the influence of different types of power sources on the soft biological tissues heating temperature allows us to conclude that the use of stabilized power and stabilized current sources is more acceptable due to the smaller influence of the SBT compression ratio on the heating temperature compared to the stabilized volt- age source. Calculations showed that when the model is heated, the impedance first decreases and then increases. Increasing the degree of compression leads to a decrease in impedance and this is observed at different frequencies. | en-US |
| dc.description | Високий тиск електродів біполярних електрохірургічних інструментів призводить до значної деформації м’яких біологічних тканин, що спричиняє руйнування мембран клітин і зневоднення тканин. У результаті цих процесів суттєво змінюються електричні та теплофізичні характеристики м’яких біологічних тканин, знання яких потрібне для дослідження механізму зварювання тканин. Проведено фізичне та математичне моделювання, досліджено зміну електричних і теплофізичних властивостей м’яких біологічних тканин у процесі їх стиснення. Результати досліджень показали, що при стисненні тканин може відбуватися значна (у рази) зміна питомої електропровідності м’яких біологічних тканин. Досліджено вплив температури нагрівання та частоти джерела струму на імпеданс моделі. | uk-UA |
| dc.format | application/pdf | |
| dc.language | ukr | |
| dc.publisher | I. Horbachevsky Ternopil National Medical University | en-US |
| dc.relation | https://ojs.tdmu.edu.ua/index.php/here/article/view/14889/13875 | |
| dc.rights | Авторське право (c) 2024 Медична інформатика та інженерія | uk-UA |
| dc.source | Medical Informatics and Engineering; No. 1-2 (2024); 42-57 | en-US |
| dc.source | Медицинская информатика и инженерия; № 1-2 (2024); 42-57 | ru-RU |
| dc.source | Медична інформатика та інженерія; № 1-2 (2024); 42-57 | uk-UA |
| dc.source | 1997-7468 | |
| dc.source | 1996-1960 | |
| dc.source | 10.11603/mie.1996-1960.2024.1-2 | |
| dc.subject | compressed soft biological tissues | en-US |
| dc.subject | high-frequency welding of biological tissues | en-US |
| dc.subject | control of electrophysical and thermophysical parameters | en-US |
| dc.subject | стиснуті м’які біологічні тканини | uk-UA |
| dc.subject | високочастотне зварювання біологічних тканин | uk-UA |
| dc.subject | контроль електро- і теплофізичних параметрів | uk-UA |
| dc.title | RESEARCH OF THE PROPERTIES OF COMPRESSED SOFT BIOLOGICAL TISSUES DURING HIGH-FREQUENCY WELDING | en-US |
| dc.title | ДОСЛІДЖЕННЯ ВЛАСТИВОСТЕЙ СТИСНУТИХ М’ЯКИХ БІОЛОГІЧНИХ ТКАНИН ПРИ ВИСОКОЧАСТОТНОМУ ЗВАРЮВАННІ | uk-UA |
| dc.type | info:eu-repo/semantics/article | |
| dc.type | info:eu-repo/semantics/publishedVersion |
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