BACKGROUND

Currently, there are not enough works devoted to the study of bladder deformation under any influence. At the same time, the creation of new surgical techniques is impossible without the use of methods of preoperative prediction of surgical results.

OBJECTIVE

Numerical modeling of deformation of a filled human urinary bladder under static load.

MATERIAL AND METHODS

The problems of modeling the human urinary bladder and its stress-strain state under external static action were considered. A method for identifying anisotropic biomechanical characteristics of bladder tissue was proposed. A FEM model (finite element method) was created, which takes into account that the bladder is surrounded by fibers and is subject to the influence of surrounding organs, partially protected by pelvic bones. The model takes into account the presence of constant hydrostatic pressure on the walls of the bladder when it is full.

RESULTS

It is shown that isotropic mechanical characteristics of biological tissue can be used to study the deformed state of a filled bladder if a filled bladder with a volume of 300 ml is considered as the initial undeformed stage, which is shown when modeling and testing the effect of an external static force on the bladder.

CONCLUSION

Numerical experiments were conducted based on the constructed model. To validate the results obtained, a series of natural experiments on the effect of external pressure on the bladder under ultrasound control were conducted. In the future, there are plans to use the constructed model to study rupture deformations of the bladder under the influence of static and dynamic loads.