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You have accessJournal of UrologyReconstruction: Urethral Reconstruction (including stricture) I (MP06)1 May 2024MP06-05 3-DIMENSIONAL SIMULATION OF URINE FLOW IN THE MALE LOWER URINARY TRACT: A COMPUTATIONAL ANALYSIS Seyed Sajjad Tabei, Benjamin Vaughan, and Wesley Baas Seyed Sajjad TabeiSeyed Sajjad Tabei , Benjamin VaughanBenjamin Vaughan , and Wesley BaasWesley Baas View All Author Informationhttps://doi.org/10.1097/01.JU.0001009452.79331.fd.05AboutPDF ToolsAdd to favoritesDownload CitationsTrack CitationsPermissionsReprints ShareFacebookLinked InTwitterEmail Abstract INTRODUCTION AND OBJECTIVE: Computational models could be employed as a method for simulating the lower urinary tract mechanics and fluid dynamics.The objective of this study is to investigate the variations in fluid characteristics throughout the urinary system by designing a computational model encompassing all components of the male lower urinary tract. METHODS: An idealized three-dimensional geometry representing the male urinary tract system was constructed using COMSOL v4.2a. Seven components included: bladder, bladder neck, prostatic urethra, membranous urethra, bulbous urethra, penile urethra, and external slit. The system assumes incompressible, homogeneous Newtonian fluid within the bladder and urethra, with steady flow, isothermal, and adiabatic conditions. RESULTS: We calculated velocity and pressure fields for two geometries. We discovered 36.2 ml/s volumetric outflow with a steady post-prostatic urethra diameter. Flow rate increased to 67.9 ml/s in the variable diameter modeling due to the greater average diameter. Figure 1. Flow is slower in the upper region of the bulbar urethra after the bend in the membranous urethra. Fluid streamlines in the prostatic, membranous, and bulbar urethra, show vortical flows near the entrance and exit of the prostatic urethra, as well as after the bend in the membranous urethra.The membranous urethra bend has significant axial and transverse pressure gradients. The bulbous and penile urethra have less pressure drop, especially at the bend of the penile urethra and near the external slit. Figure 2. CONCLUSIONS: A computerized flow model of the male lower urinary tract has successfully been created. Input and output data from this model more closely mimics in vivo values than previously published models. Practical implications of our model could be used in predicting stricture based on the urinary splash dynamics. Download PPTDownload PPT Source of Funding: None © 2024 by American Urological Association Education and Research, Inc.FiguresReferencesRelatedDetails Volume 211Issue 5SMay 2024Page: e52 Advertisement Copyright & Permissions© 2024 by American Urological Association Education and Research, Inc.Metrics Author Information Seyed Sajjad Tabei More articles by this author Benjamin Vaughan More articles by this author Wesley Baas More articles by this author Expand All Advertisement PDF downloadLoading ...
Tabei et al. (Mon,) studied this question.