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Related Concept Videos

Urinary Bladder01:23

Urinary Bladder

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The urinary bladder is a hollow, muscular sac that temporarily stores urine before it is expelled from the body. It can hold approximately 600 mL of urine prior to micturition. The bladder is retroperitoneal and located behind the pubic symphysis in the pelvic floor.
In males, the bladder is situated in front of the rectum, while in females, it is positioned anterior to the vagina and uterus. The bladder floor contains an inverted triangular area called the trigone, defined by the two ureteric...
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Related Experiment Video

Updated: Apr 5, 2026

Evaluation of Biomaterials for Bladder Augmentation using Cystometric Analyses in Various Rodent Models
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Bladder tissue biomechanical behavior: Experimental tests and constitutive formulation.

A N Natali1, A L Audenino2, W Artibani3

  • 1Centre for Mechanics of Biological Materials, University of Padova, Via F. Marzolo 9, I-35131 Padova, Italy; Department of Industrial Engineering, University of Padova, Via F. Marzolo 9, I-35131 Padova, Italy.

Journal of Biomechanics
|August 9, 2015
PubMed
Summary
This summary is machine-generated.

This study introduces a novel method to analyze bladder tissue mechanics using experiments and computational modeling. The findings reveal bladder tissue

Keywords:
BladderComputational approachExperimental testNon-linear mechanicsSoft tissue mechanics

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Area of Science:

  • Biomechanics
  • Biomaterials Science
  • Tissue Engineering

Background:

  • Understanding the mechanical properties of bladder tissue is crucial for diagnosing and treating bladder dysfunction.
  • Existing models often oversimplify the complex anisotropic and time-dependent behavior of biological tissues.
  • Porcine bladders serve as a suitable anatomical model for human bladder research due to structural similarities.

Purpose of the Study:

  • To develop and validate a robust constitutive model for bladder tissue.
  • To investigate the anisotropic, non-linear, and time-dependent mechanical behavior of bladder tissue.
  • To establish a reliable procedure for constitutive analysis of soft biological tissues.

Main Methods:

  • Experimental mechanical testing of porcine bladder specimens under uniaxial cyclic loading at varying strain rates and directions.
  • Development of a fiber-reinforced visco-hyperelastic constitutive model incorporating experimental observations.
  • Parameter identification for the constitutive model by minimizing the difference between experimental and simulated data.

Main Results:

  • Bladder tissue exhibits anisotropic, non-linear, and time-dependent stress-strain behavior.
  • Tissue stiffness is significantly greater in the transversal direction compared to other orientations.
  • Experimental data and the developed visco-hyperelastic model showed good agreement, validating the model's reliability.

Conclusions:

  • The coupled experimental and computational approach provides a reliable method for constitutive analysis of bladder tissue.
  • The developed fiber-reinforced visco-hyperelastic model accurately captures the complex mechanical characteristics of bladder tissue.
  • This methodology can be applied to other soft biological tissues requiring constitutive modeling.