A Three‐Dimensional Model of the Penis for Analysis of Tissue Stresses during Normal and Abnormal Erection
- 18 April 2007
- journal article
- research article
- Published by Wiley in Annals of the New York Academy of Sciences
- Vol. 1101 (1), 464-476
- https://doi.org/10.1196/annals.1389.027
Abstract
Approximately half of the males between the ages of 40 and 70 suffer erectile dysfunction. Because adequate mechanical interactions in the penis are necessary for functional erection it is important to analyze stresses in the erect penis. Previous penis models were limited to simplified or two‐dimensional geometry. Here we developed a three‐dimensional model for structural analysis of normal erection as well as erections of a penis with substantial asymmetry of the corporal bodies, and Peyronie's disease. The model was constructed based on anatomical images and included skin, tunica albuginea, corpus cavernosa, and spongiosum. The mechanical behavior of the tunica and skin were assumed to be three‐dimensional‐orthotropic, and other tissues as well as Peyronie's plaque was taken as linear elastic. Stresses and deformations during erection were analyzed using a commercial finite elements (FE) solver. Erection was simulated by raising blood pressure in the corporal bodies to 100 mmHg. The tunica was found to be the most highly loaded tissue in the erect penis. Peak von Mises stresses in the healthy tunica, tunica of the asymmetric corpora model, and tunica with Peyronie's disease were 114 kPa, 167 kPa, and 830 kPa, respectively. The angles of distortion of the penis with respect to the vertical axis were ∼4.5° and ∼2°, for the asymmetric and Peyronie's cases, respectively. The model's ability to determine internal stresses in the erect penis offers a new point of view on the mechanical factors involved with erection, and enables us to relate these data with different penile pathologies.Keywords
This publication has 15 references indexed in Scilit:
- Mechanical compression-induced pressure sores in rat hindlimb: muscle stiffness, histology, and computational modelsJournal of Applied Physiology, 2004
- Biomechanical aspects of Peyronie's disease in development stages and following reconstructive surgeriesInternational Journal Of Impotence Research, 2002
- Predicting penile size during erectionInternational Journal Of Impotence Research, 2000
- A biomechanical model of Peyronie's diseaseJournal of Biomechanics, 2000
- PENILE FRACTURE OF THE PROXIMAL CORPOREAL BODYJournal of Urology, 2000
- PENILE FRACTURE OF THE PROXIMAL CORPOREAL BODYJournal of Urology, 2000
- Optimization of design and surgical positioning of inflatable penile prostheses.Annals of Biomedical Engineering, 2000
- CORONAL CUFF: A PROBLEM SITE FOR BUCCAL MUCOSAL GRAFTSJournal of Urology, 1999
- CORONAL CUFF: A PROBLEM SITE FOR BUCCAL MUCOSAL GRAFTSJournal of Urology, 1999
- COMPARISON OF TUNICA ALBUGINEA SUBSTITUTES FOR THE TREATMENT OF PEYRONIE'S DISEASEJournal of Urology, 1998