In silico prototype of a human lung with a single airway to predict particle deposition
| Autor: | Raúl Barrio‐Perotti, Eduardo Blanco-Marigorta, Ana Fernandez-Tena, Adrián Pandal-Blanco |
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| Rok vydání: | 2020 |
| Předmět: |
Work (thermodynamics)
Computer science business.industry Applied Mathematics Flow (psychology) Biomedical Engineering Mechanics respiratory system Radiation Computational fluid dynamics Volumetric flow rate Trachea Computational Theory and Mathematics Modeling and Simulation Administration Inhalation Hydrodynamics Humans Particle Larynx Airway business Lung Molecular Biology Software Particle deposition |
| Zdroj: | International Journal for Numerical Methods in Biomedical Engineering. 36 |
| ISSN: | 2040-7947 2040-7939 |
| DOI: | 10.1002/cnm.3339 |
| Popis: | Background Experimental analyses of the flow of drug particles inside the human lung usually require that the patient be exposed to radiation and also of expensive equipment that often lack of enough accuracy. Numerical calculations based on CFD (computational fluid dynamics) have been proven to be a valuable tool to analyze flows in diverse applications. Methods The complexity of the human lung disallows running calculations on complete lung models due to the large number of cells that would be required. In this work, using a proprietary methodology, particle deposition in the lung is simulated by reducing its multiple branches to a single path. Results The tested flow rates were 18, 30, and 75 L min-1 , which are equivalent to different respiratory rates varying from light activity to heavy exercise. Most of the particles are accumulated in the upper airways, mainly at the mouth and also at the confluence of the larynx and the trachea (epiglottis), while the remaining particles travel across the lung. The reported procedure allowed simulating the operation of the entire lung by means of a single individual path. Conclusions The obtained calculations are in good agreement with the experimental results found in the technical literature, thus showing that the model can provide a realistic description of the lung operation, while avoiding high computational costs. Moreover, the calculations suggest that particle sizes above 15 μm and inspiratory flows higher than 30 L min-1 must be avoided in order to allow drug particles to reach the lower airways. |
| Databáze: | OpenAIRE |
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