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Stenotic geometry effects on airflow dynamics and respiration for central airway obstruction.
- Source :
-
Computer Methods & Programs in Biomedicine . Nov2023, Vol. 241, pN.PAG-N.PAG. 1p. - Publication Year :
- 2023
-
Abstract
- • 70% constriction of trachea marks the onset of a precipitous decrease in airflow. • The Myer-Cotton system can be interpreted in aerodynamics-derived description. • Bioengineering-informed evaluation for assessment of respiratory function. The quantitative relationship between tracheal anatomy and ventilation function can be analyzed by using engineering-derived methods, including mathematical modeling and numerical simulations. In order to provide quantitative functional evaluation for patients with tracheobronchial stenosis, we here propose an aerodynamics-based assessment method by applying computational fluid dynamics analysis on synthetic and patient-specific airway models. By using 3D reconstruction of tracheobronchial tree and computational fluid dynamics simulations, the aerodynamic environment from the stenotic central airway down to the 4th-6th bifurcation of the tracheobronchial tree is examined in both synthetic and patient-derived models. The effects of stenotic anatomy (the degree of stenosis, stenotic length and location) on the aerodynamic parameters, including pressure drop, area-average velocity, volume flow rate, wall shear stress and airflow resistance, are investigated on three-dimensional models of tracheobronchial tree. The results from 36 synthetic models demonstrate that 70% constriction marks the onset of a precipitous decrease in airflow relative to a normal airway. The analyses of simulation results of 8 patient-specific models indicate that the Myer-Cotton stenosis grading system can be interpreted in terms of aerodynamics-derived description, such as flow resistance. The tracheal stenosis significantly influences the resistance of peripheral bronchi, especially for patients with severe stenosis. The present study forms a systematic framework for future development of more robust, bioengineering-informed evaluation methods for quantitative assessment of respiratory function of patients with central airway obstruction. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 01692607
- Volume :
- 241
- Database :
- Academic Search Index
- Journal :
- Computer Methods & Programs in Biomedicine
- Publication Type :
- Academic Journal
- Accession number :
- 171899816
- Full Text :
- https://doi.org/10.1016/j.cmpb.2023.107760