Abstract:

The method of welding biological tissues is widely used today in surgery. It reduces the negative consequences and speeds up recovery from surgery and provides timely assistance in cases where action is required quickly enough. The process of testing the tensile strength is one of the agreed indicators for comparative physical characteristics. It is still not established how exactly the physical processes occur during the stretching of the electrowelded interstitial anastomosis. Therefore, the most convenient is to use computer simulation. The SolidWorks environment fully meets the requirements, because it can be used to simulate various physical processes and it is possible to see the distribution of stress and other physical quantities within a given structure. In SolidWorks, 3-D models of the electrowelded anastomosis section and the gut section with welding electrodes were created. The created areas of the small intestine had dimensions of 22x10x0.2 mm and they were given the properties of the serous layer of the small intestine, which were obtained as a result of practical experiments performed earlier. In the SolidWorks environment, the processes occurring during welding of biological tissues were simulated and it was obtained that during the action on the tissue with a pressure of 0.5714 MPa the thickness of the welded anastomosis is 0.23 mm, during the action with a pressure of 0.7142 MPa the thickness is 0.19 mm, during action with a pressure of 1 MPa, the thickness of the anastomosis is 0.1 mm. During the deformations to which the area of the small intestine with the welded anastomosis was subjected, the tissue was not destroyed and when the pressure on the biological tissue increased, the thickness of the suture decreased. When stretching the samples, you can see that the stress is not distributed evenly and the greatest value of the stress has a welded anastomosis, ie the destruction during stretching occurs in this place.

Keywords: biological tissue welding, electrowelded anastomosis, computer simulation, SolidWorks