Modeling on monitoring the growth and rupture assessment of saccular aneurysms

Du, Y. and Lü, C. (2017) Modeling on monitoring the growth and rupture assessment of saccular aneurysms. Theoretical and Applied Mechanics Letters, 7(2), pp. 117-120. (doi: 10.1016/j.taml.2017.01.007)

Abstract

The unpredictable rupture of saccular aneurysms especially of the intracerebral aneurysm is a knotty problem that always results in high mortality. Traditional diagnosis of medical images, which gives the aneurysm size and compares with a speculated critical size from clinical statistics, was demonstrated inadequate to forecasting rupture. Here, we propose a new detecting strategy that uses a dielectric elastomer (DE) capacitance sensor to monitor the growth of saccular aneurysms and deliver both the wall stress and geometric parameters. Based on the elastic growth theory together with the finite deformation analyses, the correlation between the real-time output capacitance of the DE sensor and the wall stress and/or geometry of an aneurysm is derived. Compared to clinic statistics and biomechanics simulations, the wall stress and geometric size may be used as combined indicators to assess the rupture risk of a saccular aneurysm. Numerical results show that an output relative capacitance of 30 indicates a high risk of rupture. Finally, the sensitivity and resolution of the DE sensor are proved adequately high for monitoring the growth state and evaluating the rupture risk of a saccular aneurysm.

• Item Type: Articles
• Additional Information: This work was supported by the National Natural Science Foundation of China (11322216, 11621062, and 11321202) and the Zhejiang Provincial Natural Science Foundation (LR13A020001).
• Status: Published
• Refereed: Yes
• Glasgow Author(s) Enlighten ID: Du, Dr Yangkun
• Authors: Du, Y., and Lü, C.
• College/School: College of Science and Engineering > School of Mathematics and Statistics > Mathematics
• Journal Name: Theoretical and Applied Mechanics Letters
• Publisher: Elsevier
• ISSN: 2095-0349
• Published Online: 27 February 2017
• Copyright Holders: Copyright © 2017 The Authors
• First Published: First published in Theoretical and Applied Mechanics Letters 7(2): 117-120
• Publisher Policy: Reproduced under a Creative Commons License