Determination of mechanical properties of human stomach tissues subjected to uniaxial stretching

The aim of the study was to determine the biomechanical properties of the walls of the human stomach. The samples were fragments of the human stomach obtained after sleeve gastrectomy. Samples cut parallel to the stomach curves and perpendicular to the stomach curves were tested in each series. All samples were subjected to uniaxial stretching. During the experiment, the length of the sample and the corresponding load (tensile force) were measured. In addition, at the beginning and end of each experiment, the average width and average thickness of the sample were determined. The collected measurement data make it possible to determine the coefficients of various models of incompressible and nearly incompressible hyperelastic materials (Neo-Hookean, Mooney-Rivlin, Ogden and others).