Surface Representation of the Urinary Bladder and Bio-mechanical Analysis by Linear Dynamic Model

This conference paper investigated biomechanical characterization of the urinary bladder using both three-dimensional surface reconstruction and tensile testing-based viscoelastic modeling. Three male bovine bladders were scanned to generate digital surface reconstructions with an average point cloud of about 9 × 10^6 elements, and tissue samples from upper, middle, and lower bladder regions were mechanically tested under tensile loading. A linear viscoelastic Voigt model was used to estimate elasticity and viscosity from the stress-strain response of the tissue. The authors reported average elasticity of 1.3 × 10^-3 N/mm and average viscosity of 89.33 × 10^-6 Ns/mm^2 across samples. Regionally, the lower bladder region showed the highest elastic response, while the upper region showed the highest viscous response under the isotropic conditions evaluated. The work establishes a combined digital and mechanical framework for representing bladder surface geometry together with regional tissue mechanics as a basis for future computational simulation of urinary bladder behaviour.