The role of the combined use of experimental and computational methods in revealing the differences between the micron -size particle deposition patterns in healthy and asthmatic subjects

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216305%3A26210%2F20%3APU136810" target="_blank" >RIV/00216305:26210/20:PU136810 - isvavai.cz</a>

Alternative codes found

RIV/00216224:14160/20:00118115

Result on the web

<a href="https://www.sciencedirect.com/science/article/pii/S0021850220300719?via%3Dihub" target="_blank" >https://www.sciencedirect.com/science/article/pii/S0021850220300719?via%3Dihub</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.jaerosci.2020.105582" target="_blank" >10.1016/j.jaerosci.2020.105582</a>

Result language

angličtina

Original language name

The role of the combined use of experimental and computational methods in revealing the differences between the micron -size particle deposition patterns in healthy and asthmatic subjects

Original language description

Quantification of airway deposition of aerosol particles is essential for the assessment of health risks of detrimental particles. Knowledge of deposition distribution is important also in the case of treatment with aerosolised drugs. It is also worth considering that deposition of inhaled particles in severe asthmatics can be different from the deposition in healthy subjects due to the modified breathing parameters, airway geometry and lobar flow distribution. The aim of this study was to apply combined experimental and numerical techniques to quantify the upper airway and bronchial deposition of the inhaled microparticles in healthy individuals in comparison with asthma patients. Idealised and realistic physical and digital replicas of the human airways were constructed. Deposition fractions and efficiencies of inhaled polydisperse mannitol and chitosan particles in different airway sections were measured and calculated. Deposition fraction of polydisperse mannitol particles in the idealised airway geometry assuming breathing conditions of healthy subjects was 21.9% and 18.3% when determined experimentally and by numerical simulations, respectively. Experimental measurements of deposition fraction of chitosan particles in the same geometry, but assuming breathing parameters characteristic of severe asthmatics yielded 32%, while simulations provided 30.1% for the same conditions. Extrathoracic deposition fraction of mannitol particles in healthy subjects measured in the realistic geometry was 71.1%, while bronchial deposition fraction was 5.3%. The corresponding simulations yielded 76.2% and 8.9% deposition fractions in the upper and bronchial airways, respectively. There was a good agreement between the experimental and simulation deposition results also in the different predefined sections of the airways. Present pilot study proved that lobar flow redistribution due to severe asthma significantly modified the deposition distribution of micro-particles. Althoug

Czech name

—

Czech description

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Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

—

OECD FORD branch

20402 - Chemical process engineering

Project

<a href="/en/project/GA18-25618S" target="_blank" >GA18-25618S: Research of the effect of the non-stationary flow on the transport of fibers in successively bifurcating mini-channels</a><br>

Continuities

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year

2020

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

JOURNAL OF AEROSOL SCIENCE

ISSN

0021-8502

e-ISSN

1879-1964

Volume of the periodical

147

Issue of the periodical within the volume

1

Country of publishing house

GB - UNITED KINGDOM

Number of pages

16

Pages from-to

1-16

UT code for WoS article

000540032700004

EID of the result in the Scopus database

2-s2.0-85085237245