MODELING OF URINARY BLADDER DEFORMATION WITHIN PASSIVE AND ACTIVE REGIMES
I. Vlastelica, D. Veljković, V. Ranković, B. Stojanović, ... (UDC: 519.673:531.01)
Abstract
Finite element model for urinary bladder mechanical response during passive filling and muscle
activation is presented in the paper. The nonlinear elastic model for the tissue is used according
to the Fung potential for the strain energy. Filling of the bladder is simulated by the pressure
increase with the passive state of muscles. When the filling phase is completed, muscles are
activated with the tripled pressure increase. This modeling is in accordance with the real
physiological processes. Data are used from experiments on the rabbit urinary bladder.
The computed distribution of stresses reveals non-uniform increase of stresses within
muscle fibers during activation.
