Variation of Passive Mechanical Properties of the Ureter along Its Length

Mastrigt, Ron van; Glerum, J. J.; Tauecchio, E.A.

doi:10.1159/000280405

Cited by 8 publications

(1 citation statement)

References 2 publications

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“…Until now, mechanical tests on ureters have been performed in humans ( Rassoli et al, 2014 ; Shilo et al, 2014 ; Sokolis, 2019 ) and different animal models ( Yin and Fung, 1971 ; Weiss et al, 1972 ), but only few data were reported for porcine model. Uniaxial tests were performed along the circumferential and longitudinal directions to evaluate the tensile strength and longitudinal direction was stiffer than circumferential one ( Van Mastrigt et al, 1981 ).…”

Section: Introductionmentioning

confidence: 99%

Mechanical characterization of porcine ureter for the evaluation of tissue-engineering applications

Casarin,

Toniolo,

Todesco

et al. 2024

Front. Bioeng. Biotechnol.

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Introduction: Clinics increasingly require readily deployable tubular substitutes to restore the functionality of structures like ureters and blood vessels. Despite extensive exploration of various materials, both synthetic and biological, the optimal solution remains elusive. Drawing on abundant literature experiences, there is a pressing demand for a substitute that not only emulates native tissue by providing requisite signals and growth factors but also exhibits appropriate mechanical resilience and behaviour.Methods: This study aims to assess the potential of porcine ureters by characterizing their biomechanical properties in their native configuration through ring and membrane flexion tests. In order to assess the tissue morphology before and after mechanical tests and the eventual alteration of tissue microstructure that would be inserted in material constitutive description, histological staining was performed on samples. Corresponding computational analyses were performed to mimic the experimental campaign to identify the constitutive material parameters.Results: The absence of any damages to muscle and collagen fibres, which only compacted after mechanical tests, was demonstrated. The experimental tests (ring and membrane flexion tests) showed non-linearity for material and geometry and the viscoelastic behaviour of the native porcine ureter. Computational models were descriptive of the mechanical behaviour ureteral tissue, and the material model feasible.Discussion: This analysis will be useful for future comparison with decellularized tissue for the evaluation of the aggression of cell removal and its effect on microstructure. The computational model could lay the basis for a reliable tool for the prediction of solicitation in the case of tubular substitutions in subsequent simulations.

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Section: Introductionmentioning

confidence: 99%

Mechanical characterization of porcine ureter for the evaluation of tissue-engineering applications

Casarin,

Toniolo,

Todesco

et al. 2024

Front. Bioeng. Biotechnol.

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The mechanics of urine transport in the upper urinary tract: 1. The dynamics of the isolated bolus

Griffiths

Notschaele

1983

Neurourology and Urodynamics

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On the basis of theoretical and experimental results, a simple mechanical framework is developed in which the propagation of the isolated bolus can be understood. It is shown that the pressure in the bolus is determined primarily by the pressure needed to separate the walls of the collapsed ureter, and that the observed variations in the velocity of the leading edge can be accounted for by nonuniformity of the ureteric cross section.

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Elastic wall properties and collagen content in the ureter: An experimental study in pigs

Coolsaet

1994

Neurourology and Urodynamics

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Knudsen et al. Coolsaet B (1985): Bladder compliance and detrusor activity during the collection phase. Neurourol Urodyn 4:263-73. Djurhuus JC, Nerstrwn B. lversen Hansen R. Gyrd-Hansen M, Rask Andersen H (1977): Dynamic of the upper urinary tract. I. An electrophysiologic in vivo study of renal pelvis in pigs. Method and normal pattern. Invest Urol 14:465-71. Dobrin PB (1978): Mechanical properties of arteries. Physiol Rev S8:397-460. Gordon AR, Siegman MJ (1971): Mechanical properties of smooth muscle. I . Length-tension and force-velocity relations. Am J Physiol 22 I : 1243-9. Gosling JA. Dixon JS (1974): Species variation in the location of upper urinary tract pacemaker cells. Invest Urol I1:418-423. Gregersen H. Andersen MB ( 199 I ): Impedance measurement system for quantification of cross-sectional area in the gastrointestinal tract. Med Biol Eng Comput 29:IOX-I 10. Gregersen H. Jensen LS. Djurhuus JC ( 19X8a): Changes in oesophageal wall biomechanics after portal vein banding and variceal sclerotherapy measured by a new technique. An experimental study in rabbits. Gut 29:1699-1704. Gregerscn H. Stdkilde-Jmgensen H. Djurhuus J C (1988b): A methtxi for investigation of compliance in luminal organs. Clin Phys Physiol Meas 9(Suppl A):61-4. Gregersen H. Kraglund K. Djurhuus JC ( 1990): Variations in duodenal cross-sectional area during the interdigestive motility complex. Am J Physiol 2SY(Gastrointest Liver Physiol 2 2 ) : G 2 6 4 3 1 . Harris JH, Therkelsen EE. Zinner NR ( 1971 ): Electrical measurement of urethral flow. In "Urodynamics." London: Academic Press. pp 465--72. Johansson B ( 1984): Different types of smooth muscle hypertrophy. Hypertension 6:63-8. Kiil F (1957): "The Function of the Ureter and Renal Pelvis." Oslo: Oslo University Press. Lose G, Colstrup H, Saksager K, Kristensen JK (1986): New probe for measurement of related values o f cross-sectional area and pressure in a biological tube. Med Biol Eng Comput 24:488-92. Mortenscn SO. Djurhuus JC. Rask-Andersen H ( 1983): A system for measurements of micturition urethral cross-sectional areas and pressures. Med Biol Eng Comput 2 I :482-488. Mulvany MJ ( 1984): Determinants of v ular hcmtxiynamic characteristics. Hypertension h(Suppl Ill):

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Variation of Passive Mechanical Properties of the Ureter along Its Length

Cited by 8 publications

References 2 publications

Mechanical characterization of porcine ureter for the evaluation of tissue-engineering applications

Mechanical characterization of porcine ureter for the evaluation of tissue-engineering applications

The mechanics of urine transport in the upper urinary tract: 1. The dynamics of the isolated bolus

Elastic wall properties and collagen content in the ureter: An experimental study in pigs

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