A new method for measuring lung deposition efficiency of airborne nanoparticles in a single breath
Jakobsson, Jonas K F LU ; Hedlund, Johan ; Kumlin, John ; Wollmer, Per LU and Löndahl, Jakob LU
(2016)
In Scientific Reports
6.
- Abstract
Assessment of respiratory tract deposition of nanoparticles is a key link to understanding their health impacts. An instrument was developed to measure respiratory tract deposition of nanoparticles in a single breath. Monodisperse nanoparticles are generated, inhaled and sampled from a determined volumetric lung depth after a controlled residence time in the lung. The instrument was characterized for sensitivity to inter-subject variability, particle size (22, 50, 75 and 100 nm) and breath-holding time (3-20 s) in a group of seven healthy subjects. The measured particle recovery had an inter-subject variability 26-50 times larger than the measurement uncertainty and the results for various particle sizes and breath-holding times were in... (More)
Assessment of respiratory tract deposition of nanoparticles is a key link to understanding their health impacts. An instrument was developed to measure respiratory tract deposition of nanoparticles in a single breath. Monodisperse nanoparticles are generated, inhaled and sampled from a determined volumetric lung depth after a controlled residence time in the lung. The instrument was characterized for sensitivity to inter-subject variability, particle size (22, 50, 75 and 100 nm) and breath-holding time (3-20 s) in a group of seven healthy subjects. The measured particle recovery had an inter-subject variability 26-50 times larger than the measurement uncertainty and the results for various particle sizes and breath-holding times were in accordance with the theory for Brownian diffusion and values calculated from the Multiple-Path Particle Dosimetry model. The recovery was found to be determined by residence time and particle size, while respiratory flow-rate had minor importance in the studied range 1-10 L/s. The instrument will be used to investigate deposition of nanoparticles in patients with respiratory disease. The fast and precise measurement allows for both diagnostic applications, where the disease may be identified based on particle recovery, and for studies with controlled delivery of aerosol-based nanomedicine to specific regions of the lungs.
(Less)
- author
- Jakobsson, Jonas K F
LU
; Hedlund, Johan
; Kumlin, John
; Wollmer, Per
LU
and Löndahl, Jakob
LU
- organization
- publishing date
- 2016-11-07
- type
- Contribution to journal
- publication status
- published
- subject
- in
- Scientific Reports
- volume
- 6
- article number
- 36147
- publisher
- Nature Publishing Group
- external identifiers
-
- scopus:84994607166
- pmid:27819335
- wos:000387002400001
- ISSN
- 2045-2322
- DOI
- 10.1038/srep36147
- language
- English
- LU publication?
- yes
- id
- 7956e6d9-8a40-49ec-b9e3-9a53799917ab
- date added to LUP
- 2016-12-01 10:53:33
- date last changed
- 2024-01-04 17:37:36
@article{7956e6d9-8a40-49ec-b9e3-9a53799917ab,
abstract = {{<p>Assessment of respiratory tract deposition of nanoparticles is a key link to understanding their health impacts. An instrument was developed to measure respiratory tract deposition of nanoparticles in a single breath. Monodisperse nanoparticles are generated, inhaled and sampled from a determined volumetric lung depth after a controlled residence time in the lung. The instrument was characterized for sensitivity to inter-subject variability, particle size (22, 50, 75 and 100 nm) and breath-holding time (3-20 s) in a group of seven healthy subjects. The measured particle recovery had an inter-subject variability 26-50 times larger than the measurement uncertainty and the results for various particle sizes and breath-holding times were in accordance with the theory for Brownian diffusion and values calculated from the Multiple-Path Particle Dosimetry model. The recovery was found to be determined by residence time and particle size, while respiratory flow-rate had minor importance in the studied range 1-10 L/s. The instrument will be used to investigate deposition of nanoparticles in patients with respiratory disease. The fast and precise measurement allows for both diagnostic applications, where the disease may be identified based on particle recovery, and for studies with controlled delivery of aerosol-based nanomedicine to specific regions of the lungs.</p>}},
author = {{Jakobsson, Jonas K F and Hedlund, Johan and Kumlin, John and Wollmer, Per and Löndahl, Jakob}},
issn = {{2045-2322}},
language = {{eng}},
month = {{11}},
publisher = {{Nature Publishing Group}},
series = {{Scientific Reports}},
title = {{A new method for measuring lung deposition efficiency of airborne nanoparticles in a single breath}},
url = {{http://dx.doi.org/10.1038/srep36147}},
doi = {{10.1038/srep36147}},
volume = {{6}},
year = {{2016}},
}