Abstract
This work is a contribution on the development of a computational model of lung parenchyma capable to simulate mechanical ventilation manoeuvres. This computational model should be able to represent adhesion caused by surface tension and be able suffer collapse and alveolar recruitment. Therefore, a contact finite element was developed and then simulated in a structure with structural properties of the same order of magnitude of a real alveolus. The simulation was performed with the non-linear finite element method. The implementation of the arc-length method was also necessary in order to prevent divergence at limit points. The numerical results of the simulation of a single alveolus, including the surface tension and adhesion, are qualitatively similar to experimental data obtained from whole excised lungs. Both present hysteresis and transmural pressures of the same order of magnitude.
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Acknowledgements
This work was supported by the National Counsel of Technological and Scientific Development (“Conselho Nacional de Desenvolvimento Cientfico e Tecnolgico” – CNPq) 135262/2007-0.
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Hellmuth, R.A.P., Lima, R.G. (2012). Contact Finite Element with Surface Tension Adhesion. In: Natal Jorge, R., Tavares, J., Pinotti Barbosa, M., Slade, A. (eds) Technologies for Medical Sciences. Lecture Notes in Computational Vision and Biomechanics, vol 1. Springer, Dordrecht. https://doi.org/10.1007/978-94-007-4068-6_2
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DOI: https://doi.org/10.1007/978-94-007-4068-6_2
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