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2605914 
Journal Article 
Deposition of micrometer-sized aerosol particles in infant nasal airway replicas 
Storey-Bishoff, J; Noga, M; Finlay, WH 
2008 
Yes 
Journal of Aerosol Science
ISSN: 0021-8502
EISSN: 1879-1964 
39 
12 
1055-1065 
WOS:000261846100004 
In vitro measurements of particle filtration were made for nasal geometries of 11 infants aged 3-18 months. The geometries were obtained from computed tomography (CT) scans of seven males and four female infants and replicas were built using rapid prototyping. Particles ranging in aerodynamic diameter from 0.8 to 5.3 mu m were passed through these replicas with simulated tidal breathing. Filtration was determined from particle Counts upstream and downstream of the models Using an electrical low pressure impactor (ELPI). Mathematical fits were constructed to predict the measured deposition based on the relevant parameters. The fractional deposition, eta is found to depend on the Reynolds number of the flow (Re), the particle Stokes number (Stk). and an airway dimension D defined as airway volume divided by airway surface area. This dependence is well captured by the formula eta = 1 - (2.164 * 10(5)/(2.164 * 10(5) + (Re(1.118)Stk(1.057)(D/D(avg))(-2.840))))(0.8510). Here, D(avg) is the average value of the dimension D for the group studied and is equal to 1.20 mm. Re and Stk also use the dimension D as the length scale in their definitions. (C) 2008 Elsevier Ltd. All rights reserved. 
Nasal model; Human infant; Nasal aerosol deposition; Impaction; In vitro